Increase warning level in unit-test.

And fix the bug that the warning found, where loading the texture image
would fail if the read couldn't complete in a single call.

hello-neon/README.md

@@ -0,0 +1,6 @@
+# Sample removed
+
+This sample has been removed in favor of the new `vectorization` sample, which
+demonstrates more options for vectorization and includes a benchmark to
+highlight that performance decisions cannot be made correctly unless you measure
+them.

native-activity/README.md

@@ -1,8 +1,24 @@
 # Native Activity
 
-Native Activity is an Android sample that initializes a GLES 2.0 context and
-reads accelerometer data from C code using
-[Native Activity](http://developer.android.com/reference/android/app/NativeActivity.html).
+This is an Android sample that uses [NativeActivity] with `native_app_glue`,
+which enables building NDK apps without having to write any Java code. In
+practice most apps, even games which are predominantly native code, will need to
+call some Java APIs or customize their app's activity further.
+
+The more modern approach to this is to use [GameActivity], which has all the
+same benefits as `NativeActivity` and `native_app_glue`, while also making it
+easier to include Java code in your app without a rewrite later. It's also
+source compatible. This sample will likely migrate to `GameActivity` in the
+future.
+
+The app here is intentionally quite simple, aiming to show the core event and
+draw loop necessary for an app using `native_app_glue` without any extra
+clutter. It uses `AChoreographer` to manage the update/render loop, and uses
+`ANativeWindow` and `AHardwareBuffer` to update the screen with a simple color
+clear.
+
+[GameActivity]: https://developer.android.com/games/agdk/game-activity
+[NativeActivity]: http://developer.android.com/reference/android/app/NativeActivity.html
 
 This sample uses the new
 [Android Studio CMake plugin](http://tools.android.com/tech-docs/external-c-builds)

native-activity/app/src/main/cpp/CMakeLists.txt

@@ -32,12 +32,10 @@ target_include_directories(native-activity PRIVATE
 target_link_libraries(native-activity
     android
     $<LINK_LIBRARY:WHOLE_ARCHIVE,native_app_glue>
-    EGL
-    GLESv1_CM
     log
 )
 
-if (ANDROID_ABI STREQUAL riscv64)
+if(ANDROID_ABI STREQUAL riscv64)
     # This sample uses Sensor Manager and Choreographer APIs which are
     # deprecated in modern API levels. Our minSdkVersion is 21, but we also
     # build for riscv64, which isn't a supported ABI yet and so that
@@ -48,4 +46,4 @@ if (ANDROID_ABI STREQUAL riscv64)
     # now, just disable the deprecation warnings so we can get the riscv64
     # samples building in CI, and we can come back to clean that up later.
     target_compile_options(native-activity PRIVATE -Wno-deprecated-declarations)
-endif ()
+endif()

native-activity/app/src/main/cpp/main.cpp

@@ -15,23 +15,19 @@
  *
  */
 
-// BEGIN_INCLUDE(all)
-#include <EGL/egl.h>
-#include <GLES/gl.h>
 #include <android/choreographer.h>
+#include <android/hardware_buffer.h>
 #include <android/log.h>
-#include <android/sensor.h>
+#include <android/native_window.h>
 #include <android/set_abort_message.h>
 #include <android_native_app_glue.h>
-#include <jni.h>
 
-#include <cassert>
-#include <cerrno>
+#include <chrono>
 #include <cstdlib>
-#include <cstring>
-#include <initializer_list>
 #include <memory>
 
+using namespace std::literals::chrono_literals;
+
 #define LOG_TAG "native-activity"
 
 #define _LOG(priority, fmt, ...)                    \
@@ -66,46 +62,35 @@
     }                                                                   \
   } while (false)
 
-/**
- * Our saved state data.
- */
-struct SavedState {
-  float angle;
-  int32_t x;
-  int32_t y;
+// Note: little endian, the opposite of normal hex color codes. ABGR, rather
+// than RGBA.
+enum class Color : uint32_t {
+  kRed = 0x000000ff,
+  kGreen = 0x0000ff00,
+  kBlue = 0x00ff0000,
 };
 
 /**
  * Shared state for our app.
  */
-struct Engine {
-  android_app* app;
+class Engine {
+ public:
+  explicit Engine(android_app* app) : app_(app) {}
 
-  ASensorManager* sensorManager;
-  const ASensor* accelerometerSensor;
-  ASensorEventQueue* sensorEventQueue;
-
-  EGLDisplay display;
-  EGLSurface surface;
-  EGLContext context;
-  int32_t width;
-  int32_t height;
-  SavedState state;
-
-  void CreateSensorListener(ALooper_callbackFunc callback) {
-    CHECK_NOT_NULL(app);
-
-    sensorManager = ASensorManager_getInstance();
-    if (sensorManager == nullptr) {
+  void AttachWindow() {
+    if (ANativeWindow_setBuffersGeometry(
+            app_->window, 0, 0, AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM) < 0) {
+      LOGE("Unable to set window buffer geometry");
+      window_initialized = false;
       return;
     }
-
-    accelerometerSensor = ASensorManager_getDefaultSensor(
-        sensorManager, ASENSOR_TYPE_ACCELEROMETER);
-    sensorEventQueue = ASensorManager_createEventQueue(
-        sensorManager, app->looper, ALOOPER_POLL_CALLBACK, callback, this);
+    window_initialized = true;
+    color_ = Color::kRed;
+    last_update_ = std::chrono::steady_clock::now();
   }
 
+  void DetachWindow() { window_initialized = false; }
+
   /// Resumes ticking the application.
   void Resume() {
     // Checked to make sure we don't double schedule Choreographer.
@@ -122,7 +107,11 @@ struct Engine {
   void Pause() { running_ = false; }
 
  private:
-  bool running_;
+  android_app* app_;
+  bool window_initialized = false;
+  bool running_ = false;
+  Color color_ = Color::kRed;
+  std::chrono::time_point<std::chrono::steady_clock> last_update_;
 
   void ScheduleNextTick() {
     AChoreographer_postFrameCallback(AChoreographer_getInstance(), Tick, this);
@@ -150,9 +139,6 @@ struct Engine {
       return;
     }
 
-    // Input and sensor feedback is handled via their own callbacks.
-    // Choreographer ensures that those callbacks run before this callback does.
-
     // Choreographer does not continuously schedule the callback. We have to re-
     // register the callback each time we're ticked.
     ScheduleNextTick();
@@ -161,202 +147,73 @@ struct Engine {
   }
 
   void Update() {
-    state.angle += .01f;
-    if (state.angle > 1) {
-      state.angle = 0;
+    auto now = std::chrono::steady_clock::now();
+    if (now - last_update_ > 1s) {
+      switch (color_) {
+        case Color::kRed:
+          color_ = Color::kGreen;
+          break;
+        case Color::kGreen:
+          color_ = Color::kBlue;
+          break;
+        case Color::kBlue:
+          color_ = Color::kRed;
+          break;
+        default:
+          fatal("unexpected color %08x", static_cast<uint32_t>(color_));
+      }
+      last_update_ = now;
     }
   }
 
-  void DrawFrame() {
-    if (display == nullptr) {
-      // No display.
+  void DrawFrame() const {
+    if (app_->window == nullptr) {
+      LOGE("Attempted to draw frame but there is no window attached");
       return;
     }
 
-    // Just fill the screen with a color.
-    glClearColor(((float)state.x) / width, state.angle,
-                 ((float)state.y) / height, 1);
-    glClear(GL_COLOR_BUFFER_BIT);
+    ANativeWindow_Buffer buffer;
+    if (ANativeWindow_lock(app_->window, &buffer, nullptr) < 0) {
+      LOGE("Unable to lock window buffer");
+      return;
+    }
 
-    eglSwapBuffers(display, surface);
+    if (!window_initialized) {
+      // If for some reason we were not able to initialize the window geometry,
+      // then we can't assume the buffer format. We could detect the buffer's
+      // format and adjust our buffer fill here to accommodate that, but's a bit
+      // beyond the scope of this sample.
+      return;
+    }
+
+    for (auto y = 0; y < buffer.height; y++) {
+      for (auto x = 0; x < buffer.width; x++) {
+        size_t pixel_idx = y * buffer.stride + x;
+        reinterpret_cast<uint32_t*>(buffer.bits)[pixel_idx] =
+            static_cast<uint32_t>(color_);
+      }
+    }
+
+    ANativeWindow_unlockAndPost(app_->window);
   }
 };
 
-/**
- * Initialize an EGL context for the current display.
- */
-static int engine_init_display(Engine* engine) {
-  // initialize OpenGL ES and EGL
-
-  /*
-   * Here specify the attributes of the desired configuration.
-   * Below, we select an EGLConfig with at least 8 bits per color
-   * component compatible with on-screen windows
-   */
-  const EGLint attribs[] = {EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
-                            EGL_BLUE_SIZE,    8,
-                            EGL_GREEN_SIZE,   8,
-                            EGL_RED_SIZE,     8,
-                            EGL_NONE};
-  EGLint w, h, format;
-  EGLint numConfigs;
-  EGLConfig config = nullptr;
-  EGLSurface surface;
-  EGLContext context;
-
-  EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
-
-  eglInitialize(display, nullptr, nullptr);
-
-  /* Here, the application chooses the configuration it desires.
-   * find the best match if possible, otherwise use the very first one
-   */
-  eglChooseConfig(display, attribs, nullptr, 0, &numConfigs);
-  std::unique_ptr<EGLConfig[]> supportedConfigs(new EGLConfig[numConfigs]);
-  assert(supportedConfigs);
-  eglChooseConfig(display, attribs, supportedConfigs.get(), numConfigs,
-                  &numConfigs);
-  assert(numConfigs);
-  auto i = 0;
-  for (; i < numConfigs; i++) {
-    auto& cfg = supportedConfigs[i];
-    EGLint r, g, b, d;
-    if (eglGetConfigAttrib(display, cfg, EGL_RED_SIZE, &r) &&
-        eglGetConfigAttrib(display, cfg, EGL_GREEN_SIZE, &g) &&
-        eglGetConfigAttrib(display, cfg, EGL_BLUE_SIZE, &b) &&
-        eglGetConfigAttrib(display, cfg, EGL_DEPTH_SIZE, &d) && r == 8 &&
-        g == 8 && b == 8 && d == 0) {
-      config = supportedConfigs[i];
-      break;
-    }
-  }
-  if (i == numConfigs) {
-    config = supportedConfigs[0];
-  }
-
-  if (config == nullptr) {
-    LOGW("Unable to initialize EGLConfig");
-    return -1;
-  }
-
-  /* EGL_NATIVE_VISUAL_ID is an attribute of the EGLConfig that is
-   * guaranteed to be accepted by ANativeWindow_setBuffersGeometry().
-   * As soon as we picked a EGLConfig, we can safely reconfigure the
-   * ANativeWindow buffers to match, using EGL_NATIVE_VISUAL_ID. */
-  eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &format);
-  surface =
-      eglCreateWindowSurface(display, config, engine->app->window, nullptr);
-
-  /* A version of OpenGL has not been specified here.  This will default to
-   * OpenGL 1.0.  You will need to change this if you want to use the newer
-   * features of OpenGL like shaders. */
-  context = eglCreateContext(display, config, nullptr, nullptr);
-
-  if (eglMakeCurrent(display, surface, surface, context) == EGL_FALSE) {
-    LOGW("Unable to eglMakeCurrent");
-    return -1;
-  }
-
-  eglQuerySurface(display, surface, EGL_WIDTH, &w);
-  eglQuerySurface(display, surface, EGL_HEIGHT, &h);
-
-  engine->display = display;
-  engine->context = context;
-  engine->surface = surface;
-  engine->width = w;
-  engine->height = h;
-  engine->state.angle = 0;
-
-  // Check openGL on the system
-  auto opengl_info = {GL_VENDOR, GL_RENDERER, GL_VERSION, GL_EXTENSIONS};
-  for (auto name : opengl_info) {
-    auto info = glGetString(name);
-    LOGI("OpenGL Info: %s", info);
-  }
-  // Initialize GL state.
-  glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
-  glEnable(GL_CULL_FACE);
-  glShadeModel(GL_SMOOTH);
-  glDisable(GL_DEPTH_TEST);
-
-  return 0;
-}
-
-/**
- * Tear down the EGL context currently associated with the display.
- */
-static void engine_term_display(Engine* engine) {
-  if (engine->display != EGL_NO_DISPLAY) {
-    eglMakeCurrent(engine->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
-                   EGL_NO_CONTEXT);
-    if (engine->context != EGL_NO_CONTEXT) {
-      eglDestroyContext(engine->display, engine->context);
-    }
-    if (engine->surface != EGL_NO_SURFACE) {
-      eglDestroySurface(engine->display, engine->surface);
-    }
-    eglTerminate(engine->display);
-  }
-  engine->Pause();
-  engine->display = EGL_NO_DISPLAY;
-  engine->context = EGL_NO_CONTEXT;
-  engine->surface = EGL_NO_SURFACE;
-}
-
-/**
- * Process the next input event.
- */
-static int32_t engine_handle_input(android_app* app, AInputEvent* event) {
-  auto* engine = (Engine*)app->userData;
-  if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION) {
-    engine->state.x = AMotionEvent_getX(event, 0);
-    engine->state.y = AMotionEvent_getY(event, 0);
-    return 1;
-  }
-  return 0;
-}
-
 /**
  * Process the next main command.
  */
 static void engine_handle_cmd(android_app* app, int32_t cmd) {
   auto* engine = (Engine*)app->userData;
   switch (cmd) {
-    case APP_CMD_SAVE_STATE:
-      // The system has asked us to save our current state.  Do so.
-      engine->app->savedState = malloc(sizeof(SavedState));
-      *((SavedState*)engine->app->savedState) = engine->state;
-      engine->app->savedStateSize = sizeof(SavedState);
-      break;
     case APP_CMD_INIT_WINDOW:
-      // The window is being shown, get it ready.
-      if (engine->app->window != nullptr) {
-        engine_init_display(engine);
-      }
+      engine->AttachWindow();
       break;
     case APP_CMD_TERM_WINDOW:
-      // The window is being hidden or closed, clean it up.
-      engine_term_display(engine);
+      engine->DetachWindow();
       break;
     case APP_CMD_GAINED_FOCUS:
-      // When our app gains focus, we start monitoring the accelerometer.
-      if (engine->accelerometerSensor != nullptr) {
-        ASensorEventQueue_enableSensor(engine->sensorEventQueue,
-                                       engine->accelerometerSensor);
-        // We'd like to get 60 events per second (in us).
-        ASensorEventQueue_setEventRate(engine->sensorEventQueue,
-                                       engine->accelerometerSensor,
-                                       (1000L / 60) * 1000);
-      }
       engine->Resume();
       break;
     case APP_CMD_LOST_FOCUS:
-      // When our app loses focus, we stop monitoring the accelerometer.
-      // This is to avoid consuming battery while not being used.
-      if (engine->accelerometerSensor != nullptr) {
-        ASensorEventQueue_disableSensor(engine->sensorEventQueue,
-                                        engine->accelerometerSensor);
-      }
       engine->Pause();
       break;
     default:
@@ -364,45 +221,16 @@ static void engine_handle_cmd(android_app* app, int32_t cmd) {
   }
 }
 
-int OnSensorEvent(int /* fd */, int /* events */, void* data) {
-  CHECK_NOT_NULL(data);
-  Engine* engine = reinterpret_cast<Engine*>(data);
-
-  CHECK_NOT_NULL(engine->accelerometerSensor);
-  ASensorEvent event;
-  while (ASensorEventQueue_getEvents(engine->sensorEventQueue, &event, 1) > 0) {
-    LOGI("accelerometer: x=%f y=%f z=%f", event.acceleration.x,
-         event.acceleration.y, event.acceleration.z);
-  }
-
-  // From the docs:
-  //
-  // Implementations should return 1 to continue receiving callbacks, or 0 to
-  // have this file descriptor and callback unregistered from the looper.
-  return 1;
-}
-
 /**
  * This is the main entry point of a native application that is using
  * android_native_app_glue.  It runs in its own thread, with its own
  * event loop for receiving input events and doing other things.
  */
 void android_main(android_app* state) {
-  Engine engine{};
+  Engine engine{state};
 
-  memset(&engine, 0, sizeof(engine));
   state->userData = &engine;
   state->onAppCmd = engine_handle_cmd;
-  state->onInputEvent = engine_handle_input;
-  engine.app = state;
-
-  // Prepare to monitor accelerometer
-  engine.CreateSensorListener(OnSensorEvent);
-
-  if (state->savedState != nullptr) {
-    // We are starting with a previous saved state; restore from it.
-    engine.state = *(SavedState*)state->savedState;
-  }
 
   while (!state->destroyRequested) {
     // Our input, sensor, and update/render logic is all driven by callbacks, so
@@ -418,7 +246,4 @@ void android_main(android_app* state) {
       source->process(state, source);
     }
   }
-
-  engine_term_display(&engine);
 }
-// END_INCLUDE(all)

native-audio/app/src/main/cpp/CMakeLists.txt

@@ -1,10 +1,10 @@
 cmake_minimum_required(VERSION 3.22.1)
-project(NativeAudio LANGUAGES C)
+project(NativeAudio LANGUAGES CXX)
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+include(AppLibrary)
 
-add_library(native-audio-jni SHARED
-    native-audio-jni.c
+add_app_library(native-audio-jni SHARED
+    native-audio-jni.cpp
 )
 
 # Include libraries needed for native-audio-jni lib
@@ -13,3 +13,13 @@ target_link_libraries(native-audio-jni
     log
     OpenSLES
 )
+
+if(ANDROID_ABI STREQUAL riscv64)
+    # This sample uses OpenSLES, which was deprecated in API 26. Our
+    # minSdkVersion is 23, but we also build for riscv64, which isn't a
+    # supported ABI yet and so that configuration is built for the latest API
+    # level supported by the NDK.
+    #
+    # Longer term, this sample should migrate to Oboe.
+    target_compile_options(native-audio-jni PRIVATE -Wno-deprecated-declarations)
+endif()

native-audio/app/src/main/cpp/native-audio-jni.cpp

@@ -195,9 +195,9 @@ short* createResampledBuf(uint32_t idx, uint32_t srcRate, unsigned* size) {
 }
 
 // this callback handler is called every time a buffer finishes playing
-void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void* context) {
+void bqPlayerCallback([[maybe_unused]] SLAndroidSimpleBufferQueueItf bq,
+                      void*) {
   assert(bq == bqPlayerBufferQueue);
-  assert(NULL == context);
   // for streaming playback, replace this test by logic to find and fill the
   // next buffer
   if (--nextCount > 0 && NULL != nextBuffer && 0 != nextSize) {
@@ -218,9 +218,9 @@ void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void* context) {
 }
 
 // this callback handler is called every time a buffer finishes recording
-void bqRecorderCallback(SLAndroidSimpleBufferQueueItf bq, void* context) {
+void bqRecorderCallback([[maybe_unused]] SLAndroidSimpleBufferQueueItf bq,
+                        void*) {
   assert(bq == recorderBufferQueue);
-  assert(NULL == context);
   // for streaming recording, here we would call Enqueue to give recorder the
   // next buffer to fill but instead, this is a one-time buffer so we stop
   // recording
@@ -234,8 +234,8 @@ void bqRecorderCallback(SLAndroidSimpleBufferQueueItf bq, void* context) {
 }
 
 // create the engine and output mix objects
-JNIEXPORT void JNICALL Java_com_example_nativeaudio_NativeAudio_createEngine(
-    JNIEnv* env, jclass clazz) {
+extern "C" JNIEXPORT void JNICALL
+Java_com_example_nativeaudio_NativeAudio_createEngine(JNIEnv*, jclass) {
   SLresult result;
 
   // create engine
@@ -286,9 +286,9 @@ JNIEXPORT void JNICALL Java_com_example_nativeaudio_NativeAudio_createEngine(
 }
 
 // create buffer queue audio player
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_createBufferQueueAudioPlayer(
-    JNIEnv* env, jclass clazz, jint sampleRate, jint bufSize) {
+    JNIEnv*, jclass, jint sampleRate, jint bufSize) {
   SLresult result;
   if (sampleRate >= 0 && bufSize >= 0) {
     bqPlayerSampleRate = sampleRate * 1000;
@@ -395,14 +395,14 @@ Java_com_example_nativeaudio_NativeAudio_createBufferQueueAudioPlayer(
 }
 
 // create URI audio player
-JNIEXPORT jboolean JNICALL
+extern "C" JNIEXPORT jboolean JNICALL
 Java_com_example_nativeaudio_NativeAudio_createUriAudioPlayer(JNIEnv* env,
-                                                              jclass clazz,
+                                                              jclass,
                                                               jstring uri) {
   SLresult result;
 
   // convert Java string to UTF-8
-  const char* utf8 = (*env)->GetStringUTFChars(env, uri, NULL);
+  const char* utf8 = env->GetStringUTFChars(uri, NULL);
   assert(NULL != utf8);
 
   // configure audio source
@@ -429,7 +429,7 @@ Java_com_example_nativeaudio_NativeAudio_createUriAudioPlayer(JNIEnv* env,
   (void)result;
 
   // release the Java string and UTF-8
-  (*env)->ReleaseStringUTFChars(env, uri, utf8);
+  env->ReleaseStringUTFChars(uri, utf8);
 
   // realize the player
   result = (*uriPlayerObject)->Realize(uriPlayerObject, SL_BOOLEAN_FALSE);
@@ -471,9 +471,9 @@ Java_com_example_nativeaudio_NativeAudio_createUriAudioPlayer(JNIEnv* env,
 
 // set the playing state for the URI audio player
 // to PLAYING (true) or PAUSED (false)
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_setPlayingUriAudioPlayer(
-    JNIEnv* env, jclass clazz, jboolean isPlaying) {
+    JNIEnv*, jclass, jboolean isPlaying) {
   SLresult result;
 
   // make sure the URI audio player was created
@@ -488,9 +488,9 @@ Java_com_example_nativeaudio_NativeAudio_setPlayingUriAudioPlayer(
 }
 
 // set the whole file looping state for the URI audio player
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_setLoopingUriAudioPlayer(
-    JNIEnv* env, jclass clazz, jboolean isLooping) {
+    JNIEnv*, jclass, jboolean isLooping) {
   SLresult result;
 
   // make sure the URI audio player was created
@@ -515,9 +515,9 @@ static SLMuteSoloItf getMuteSolo() {
     return bqPlayerMuteSolo;
 }
 
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_setChannelMuteUriAudioPlayer(
-    JNIEnv* env, jclass clazz, jint chan, jboolean mute) {
+    JNIEnv*, jclass, jint chan, jboolean mute) {
   SLresult result;
   SLMuteSoloItf muteSoloItf = getMuteSolo();
   if (NULL != muteSoloItf) {
@@ -527,9 +527,9 @@ Java_com_example_nativeaudio_NativeAudio_setChannelMuteUriAudioPlayer(
   }
 }
 
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_setChannelSoloUriAudioPlayer(
-    JNIEnv* env, jclass clazz, jint chan, jboolean solo) {
+    JNIEnv*, jclass, jint chan, jboolean solo) {
   SLresult result;
   SLMuteSoloItf muteSoloItf = getMuteSolo();
   if (NULL != muteSoloItf) {
@@ -539,9 +539,9 @@ Java_com_example_nativeaudio_NativeAudio_setChannelSoloUriAudioPlayer(
   }
 }
 
-JNIEXPORT jint JNICALL
-Java_com_example_nativeaudio_NativeAudio_getNumChannelsUriAudioPlayer(
-    JNIEnv* env, jclass clazz) {
+extern "C" JNIEXPORT jint JNICALL
+Java_com_example_nativeaudio_NativeAudio_getNumChannelsUriAudioPlayer(JNIEnv*,
+                                                                      jclass) {
   SLuint8 numChannels;
   SLresult result;
   SLMuteSoloItf muteSoloItf = getMuteSolo();
@@ -570,9 +570,9 @@ static SLVolumeItf getVolume() {
     return bqPlayerVolume;
 }
 
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_setVolumeUriAudioPlayer(
-    JNIEnv* env, jclass clazz, jint millibel) {
+    JNIEnv*, jclass, jint millibel) {
   SLresult result;
   SLVolumeItf volumeItf = getVolume();
   if (NULL != volumeItf) {
@@ -582,9 +582,8 @@ Java_com_example_nativeaudio_NativeAudio_setVolumeUriAudioPlayer(
   }
 }
 
-JNIEXPORT void JNICALL
-Java_com_example_nativeaudio_NativeAudio_setMuteUriAudioPlayer(JNIEnv* env,
-                                                               jclass clazz,
+extern "C" JNIEXPORT void JNICALL
+Java_com_example_nativeaudio_NativeAudio_setMuteUriAudioPlayer(JNIEnv*, jclass,
                                                                jboolean mute) {
   SLresult result;
   SLVolumeItf volumeItf = getVolume();
@@ -595,9 +594,9 @@ Java_com_example_nativeaudio_NativeAudio_setMuteUriAudioPlayer(JNIEnv* env,
   }
 }
 
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_enableStereoPositionUriAudioPlayer(
-    JNIEnv* env, jclass clazz, jboolean enable) {
+    JNIEnv*, jclass, jboolean enable) {
   SLresult result;
   SLVolumeItf volumeItf = getVolume();
   if (NULL != volumeItf) {
@@ -607,9 +606,9 @@ Java_com_example_nativeaudio_NativeAudio_enableStereoPositionUriAudioPlayer(
   }
 }
 
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_setStereoPositionUriAudioPlayer(
-    JNIEnv* env, jclass clazz, jint permille) {
+    JNIEnv*, jclass, jint permille) {
   SLresult result;
   SLVolumeItf volumeItf = getVolume();
   if (NULL != volumeItf) {
@@ -620,8 +619,8 @@ Java_com_example_nativeaudio_NativeAudio_setStereoPositionUriAudioPlayer(
 }
 
 // enable reverb on the buffer queue player
-JNIEXPORT jboolean JNICALL
-Java_com_example_nativeaudio_NativeAudio_enableReverb(JNIEnv* env, jclass clazz,
+extern "C" JNIEXPORT jboolean JNICALL
+Java_com_example_nativeaudio_NativeAudio_enableReverb(JNIEnv*, jclass,
                                                       jboolean enabled) {
   SLresult result;
 
@@ -650,8 +649,9 @@ Java_com_example_nativeaudio_NativeAudio_enableReverb(JNIEnv* env, jclass clazz,
 }
 
 // select the desired clip and play count, and enqueue the first buffer if idle
-JNIEXPORT jboolean JNICALL Java_com_example_nativeaudio_NativeAudio_selectClip(
-    JNIEnv* env, jclass clazz, jint which, jint count) {
+extern "C" JNIEXPORT jboolean JNICALL
+Java_com_example_nativeaudio_NativeAudio_selectClip(JNIEnv*, jclass, jint which,
+                                                    jint count) {
   if (pthread_mutex_trylock(&audioEngineLock)) {
     // If we could not acquire audio engine lock, reject this request and client
     // should re-try
@@ -722,13 +722,13 @@ JNIEXPORT jboolean JNICALL Java_com_example_nativeaudio_NativeAudio_selectClip(
 }
 
 // create asset audio player
-JNIEXPORT jboolean JNICALL
+extern "C" JNIEXPORT jboolean JNICALL
 Java_com_example_nativeaudio_NativeAudio_createAssetAudioPlayer(
-    JNIEnv* env, jclass clazz, jobject assetManager, jstring filename) {
+    JNIEnv* env, jclass, jobject assetManager, jstring filename) {
   SLresult result;
 
   // convert Java string to UTF-8
-  const char* utf8 = (*env)->GetStringUTFChars(env, filename, NULL);
+  const char* utf8 = env->GetStringUTFChars(filename, NULL);
   assert(NULL != utf8);
 
   // use asset manager to open asset by filename
@@ -737,7 +737,7 @@ Java_com_example_nativeaudio_NativeAudio_createAssetAudioPlayer(
   AAsset* asset = AAssetManager_open(mgr, utf8, AASSET_MODE_UNKNOWN);
 
   // release the Java string and UTF-8
-  (*env)->ReleaseStringUTFChars(env, filename, utf8);
+  env->ReleaseStringUTFChars(filename, utf8);
 
   // the asset might not be found
   if (NULL == asset) {
@@ -811,9 +811,9 @@ Java_com_example_nativeaudio_NativeAudio_createAssetAudioPlayer(
 }
 
 // set the playing state for the asset audio player
-JNIEXPORT void JNICALL
+extern "C" JNIEXPORT void JNICALL
 Java_com_example_nativeaudio_NativeAudio_setPlayingAssetAudioPlayer(
-    JNIEnv* env, jclass clazz, jboolean isPlaying) {
+    JNIEnv*, jclass, jboolean isPlaying) {
   SLresult result;
 
   // make sure the asset audio player was created
@@ -830,9 +830,8 @@ Java_com_example_nativeaudio_NativeAudio_setPlayingAssetAudioPlayer(
 // create audio recorder: recorder is not in fast path
 //    like to avoid excessive re-sampling while playing back from Hello &
 //    Android clip
-JNIEXPORT jboolean JNICALL
-Java_com_example_nativeaudio_NativeAudio_createAudioRecorder(JNIEnv* env,
-                                                             jclass clazz) {
+extern "C" JNIEXPORT jboolean JNICALL
+Java_com_example_nativeaudio_NativeAudio_createAudioRecorder(JNIEnv*, jclass) {
   SLresult result;
 
   // configure audio source
@@ -892,8 +891,8 @@ Java_com_example_nativeaudio_NativeAudio_createAudioRecorder(JNIEnv* env,
 }
 
 // set the recording state for the audio recorder
-JNIEXPORT void JNICALL Java_com_example_nativeaudio_NativeAudio_startRecording(
-    JNIEnv* env, jclass clazz) {
+extern "C" JNIEXPORT void JNICALL
+Java_com_example_nativeaudio_NativeAudio_startRecording(JNIEnv*, jclass) {
   SLresult result;
 
   if (pthread_mutex_trylock(&audioEngineLock)) {
@@ -930,8 +929,8 @@ JNIEXPORT void JNICALL Java_com_example_nativeaudio_NativeAudio_startRecording(
 }
 
 // shut down the native audio system
-JNIEXPORT void JNICALL
-Java_com_example_nativeaudio_NativeAudio_shutdown(JNIEnv* env, jclass clazz) {
+extern "C" JNIEXPORT void JNICALL
+Java_com_example_nativeaudio_NativeAudio_shutdown(JNIEnv*, jclass) {
   // destroy buffer queue audio player object, and invalidate all associated
   // interfaces
   if (bqPlayerObject != NULL) {

native-codec/app/src/main/cpp/CMakeLists.txt

@@ -1,4 +1,5 @@
 cmake_minimum_required(VERSION 3.22.1)
+project(NativeCodec LANGUAGES CXX)
 
 include(AppLibrary)
 

native-media/README.md

@@ -1,73 +1,5 @@
-# Native Media
+# Sample removed
 
-Native Media is an Android sample that uses OpenMAX AL to play a video.
-
-Note: This sample requires an MPEG-2 Transport Stream file to be placed in
-app/src/main/assets/clips/NativeMedia.ts and encoded as:
-
-```
-  video: H.264 baseline profile
-  audio: AAC LC stereo
-```
-
-For demonstration purposes we have supplied such a .ts file, any actual stream
-must be created according to the MPEG-2 specification.
-
-This sample uses the new
-[Android Studio CMake plugin](http://tools.android.com/tech-docs/external-c-builds)
-with C++ support.
-
-## Pre-requisites
-
-- Android Studio 2.2+ with [NDK](https://developer.android.com/ndk/) bundle.
-
-## Getting Started
-
-1. [Download Android Studio](http://developer.android.com/sdk/index.html)
-1. Launch Android Studio.
-1. Open the sample directory.
-1. Open *File/Project Structure...*
-
-- Click *Download* or *Select NDK location*.
-
-1. Click *Tools/Android/Sync Project with Gradle Files*.
-1. Click *Run/Run 'app'*.
-
-## Screenshots
-
-![screenshot](screenshot.png)
-
-## Known Issues
-
-- Android-N preoview: native player path is not working, under debug now
-
-## Support
-
-If you've found an error in these samples, please
-[file an issue](https://github.com/googlesamples/android-ndk/issues/new).
-
-Patches are encouraged, and may be submitted by
-[forking this project](https://github.com/googlesamples/android-ndk/fork) and
-submitting a pull request through GitHub. Please see
-[CONTRIBUTING.md](../CONTRIBUTING.md) for more details.
-
-- [Stack Overflow](http://stackoverflow.com/questions/tagged/android-ndk)
-- [Android Tools Feedbacks](http://tools.android.com/feedback)
-
-## License
-
-Copyright 2015 Google, Inc.
-
-Licensed to the Apache Software Foundation (ASF) under one or more contributor
-license agreements. See the NOTICE file distributed with this work for
-additional information regarding copyright ownership. The ASF licenses this file
-to you under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software distributed
-under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-CONDITIONS OF ANY KIND, either express or implied. See the License for the
-specific language governing permissions and limitations under the License.
+This sample has been removed because we no longer recommend using OpenMAX AL in
+new code. See the `native-codec` sample instead for an example of how to use the
+Android Media APIs.

native-media/app/build.gradle

@@ -1,21 +0,0 @@
-plugins {
-    id "ndksamples.android.application"
-}
-
-android {
-    namespace 'com.example.nativemedia'
-
-    defaultConfig {
-        applicationId 'com.example.nativemedia'
-    }
-
-    externalNativeBuild {
-        cmake {
-            path 'src/main/cpp/CMakeLists.txt'
-        }
-    }
-
-    androidResources {
-        noCompress 'ts'
-    }
-}

native-media/app/src/main/AndroidManifest.xml

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-  <uses-feature android:glEsVersion="0x00020000" />
-  <!-- INTERNET is needed to use a URI-based media player, depending on the URI -->
-  <uses-permission android:name="android.permission.INTERNET"></uses-permission>
-  <application android:allowBackup="false"
-               android:fullBackupContent="false"
-               android:icon="@mipmap/ic_launcher"
-               android:label="@string/app_name">
-    <activity android:name=".NativeMedia"
-              android:label="@string/app_name"
-        android:exported="true">
-      <intent-filter>
-        <action android:name="android.intent.action.MAIN" />
-        <category android:name="android.intent.category.LAUNCHER" />
-      </intent-filter>
-    </activity>
-  </application>
-</manifest>

native-media/app/src/main/cpp/CMakeLists.txt

@@ -1,17 +0,0 @@
-cmake_minimum_required(VERSION 3.22.1)
-project(NativeMedia LANGUAGES C)
-
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -UNDEBUG")
-
-add_library(native-media-jni SHARED
-    android_fopen.c
-    native-media-jni.c
-)
-
-# Include libraries needed for native-media-jni lib
-target_link_libraries(native-media-jni
-    android
-    log
-    OpenMAXAL
-)
-

native-media/app/src/main/cpp/android_fopen.c

@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// The original code is from https://github.com/netguy204/gambit-game-lib
-#include "android_fopen.h"
-
-#include <android/asset_manager.h>
-#include <errno.h>
-
-static int android_read(void* cookie, char* buf, int size) {
-  return AAsset_read((AAsset*)cookie, buf, size);
-}
-
-static int android_write(void* cookie, const char* buf, int size) {
-  return EACCES;  // can't provide write access to the apk
-}
-
-static fpos_t android_seek(void* cookie, fpos_t offset, int whence) {
-  return AAsset_seek((AAsset*)cookie, offset, whence);
-}
-
-static int android_close(void* cookie) {
-  AAsset_close((AAsset*)cookie);
-  return 0;
-}
-
-// must be established by someone else...
-static AAssetManager* android_asset_manager = NULL;
-void android_fopen_set_asset_manager(AAssetManager* manager) {
-  android_asset_manager = manager;
-}
-
-FILE* android_fopen(const char* fname, const char* mode) {
-  if (mode[0] == 'w') return NULL;
-
-  AAsset* asset = AAssetManager_open(android_asset_manager, fname, 0);
-  if (!asset) return NULL;
-
-  return funopen(asset, android_read, android_write, android_seek,
-                 android_close);
-}

native-media/app/src/main/cpp/android_fopen.h

@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_FOPEN_H
-#define ANDROID_FOPEN_H
-#define __USE_BSD
-#include <android/asset_manager.h>
-#include <stdio.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* hijack fopen and route it through the android asset system so that
-   we can pull things out of our packagesk APK */
-
-void android_fopen_set_asset_manager(AAssetManager* manager);
-FILE* android_fopen(const char* fname, const char* mode);
-
-#define fopen(name, mode) android_fopen(name, mode)
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif

native-media/app/src/main/cpp/native-media-jni.c

@@ -1,560 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/* This is a JNI example where we use native methods to play video
- * using OpenMAX AL. See the corresponding Java source file located at:
- *
- *   src/com/example/nativemedia/NativeMedia/NativeMedia.java
- *
- * In this example we use assert() for "impossible" error conditions,
- * and explicit handling and recovery for more likely error conditions.
- */
-
-#include <assert.h>
-#include <jni.h>
-#include <pthread.h>
-#include <stdio.h>
-#include <string.h>
-
-// for __android_log_print(ANDROID_LOG_INFO, "YourApp", "formatted message");
-#include <android/log.h>
-#define TAG "NativeMedia"
-#define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, TAG, __VA_ARGS__)
-
-// for native media
-#include <OMXAL/OpenMAXAL.h>
-#include <OMXAL/OpenMAXAL_Android.h>
-
-// for native window JNI
-#include <android/asset_manager_jni.h>
-#include <android/native_window_jni.h>
-
-#include "android_fopen.h"
-
-// engine interfaces
-static XAObjectItf engineObject = NULL;
-static XAEngineItf engineEngine = NULL;
-
-// output mix interfaces
-static XAObjectItf outputMixObject = NULL;
-
-// streaming media player interfaces
-static XAObjectItf playerObj = NULL;
-static XAPlayItf playerPlayItf = NULL;
-static XAAndroidBufferQueueItf playerBQItf = NULL;
-static XAStreamInformationItf playerStreamInfoItf = NULL;
-static XAVolumeItf playerVolItf = NULL;
-
-// number of required interfaces for the MediaPlayer creation
-#define NB_MAXAL_INTERFACES \
-  3  // XAAndroidBufferQueueItf, XAStreamInformationItf and XAPlayItf
-
-// video sink for the player
-static ANativeWindow* theNativeWindow;
-
-// number of buffers in our buffer queue, an arbitrary number
-#define NB_BUFFERS 8
-
-// we're streaming MPEG-2 transport stream data, operate on transport stream
-// block size
-#define MPEG2_TS_PACKET_SIZE 188
-
-// number of MPEG-2 transport stream blocks per buffer, an arbitrary number
-#define PACKETS_PER_BUFFER 10
-
-// determines how much memory we're dedicating to memory caching
-#define BUFFER_SIZE (PACKETS_PER_BUFFER * MPEG2_TS_PACKET_SIZE)
-
-// where we cache in memory the data to play
-// note this memory is re-used by the buffer queue callback
-static char dataCache[BUFFER_SIZE * NB_BUFFERS];
-
-// handle of the file to play
-static FILE* file;
-static jobject android_java_asset_manager = NULL;
-
-// has the app reached the end of the file
-static jboolean reachedEof = JNI_FALSE;
-
-// constant to identify a buffer context which is the end of the stream to
-// decode
-static const int kEosBufferCntxt =
-    1980;  // a magic value we can compare against
-
-// For mutual exclusion between callback thread and application thread(s).
-// The mutex protects reachedEof, discontinuity,
-// The condition is signalled when a discontinuity is acknowledged.
-
-static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
-
-// whether a discontinuity is in progress
-static jboolean discontinuity = JNI_FALSE;
-
-static jboolean enqueueInitialBuffers(jboolean discontinuity);
-
-// AndroidBufferQueueItf callback to supply MPEG-2 TS packets to the media
-// player
-static XAresult AndroidBufferQueueCallback(
-    XAAndroidBufferQueueItf caller, void* pCallbackContext, /* input */
-    void* pBufferContext,                                   /* input */
-    void* pBufferData,                                      /* input */
-    XAuint32 dataSize,                                      /* input */
-    XAuint32 dataUsed,                                      /* input */
-    const XAAndroidBufferItem* pItems,                      /* input */
-    XAuint32 itemsLength /* input */) {
-  XAresult res;
-  int ok;
-
-  // pCallbackContext was specified as NULL at RegisterCallback and is unused
-  // here
-  assert(NULL == pCallbackContext);
-
-  // note there is never any contention on this mutex unless a discontinuity
-  // request is active
-  ok = pthread_mutex_lock(&mutex);
-  assert(0 == ok);
-
-  // was a discontinuity requested?
-  if (discontinuity) {
-    // Note: can't rewind after EOS, which we send when reaching EOF
-    // (don't send EOS if you plan to play more content through the same player)
-    if (!reachedEof) {
-      // clear the buffer queue
-      res = (*playerBQItf)->Clear(playerBQItf);
-      assert(XA_RESULT_SUCCESS == res);
-      // rewind the data source so we are guaranteed to be at an appropriate
-      // point
-      rewind(file);
-      // Enqueue the initial buffers, with a discontinuity indicator on first
-      // buffer
-      (void)enqueueInitialBuffers(JNI_TRUE);
-    }
-    // acknowledge the discontinuity request
-    discontinuity = JNI_FALSE;
-    ok = pthread_cond_signal(&cond);
-    assert(0 == ok);
-    goto exit;
-  }
-
-  if ((pBufferData == NULL) && (pBufferContext != NULL)) {
-    const int processedCommand = *(int*)pBufferContext;
-    if (kEosBufferCntxt == processedCommand) {
-      LOGV("EOS was processed\n");
-      // our buffer with the EOS message has been consumed
-      assert(0 == dataSize);
-      goto exit;
-    }
-  }
-
-  // pBufferData is a pointer to a buffer that we previously Enqueued
-  assert((dataSize > 0) && ((dataSize % MPEG2_TS_PACKET_SIZE) == 0));
-  assert(dataCache <= (char*)pBufferData &&
-         (char*)pBufferData < &dataCache[BUFFER_SIZE * NB_BUFFERS]);
-  assert(0 == (((char*)pBufferData - dataCache) % BUFFER_SIZE));
-
-  // don't bother trying to read more data once we've hit EOF
-  if (reachedEof) {
-    goto exit;
-  }
-
-  // note we do call fread from multiple threads, but never concurrently
-  size_t bytesRead;
-  bytesRead = fread(pBufferData, 1, BUFFER_SIZE, file);
-  if (bytesRead > 0) {
-    if ((bytesRead % MPEG2_TS_PACKET_SIZE) != 0) {
-      LOGV("Dropping last packet because it is not whole");
-    }
-    size_t packetsRead = bytesRead / MPEG2_TS_PACKET_SIZE;
-    size_t bufferSize = packetsRead * MPEG2_TS_PACKET_SIZE;
-    res = (*caller)->Enqueue(caller, NULL /*pBufferContext*/,
-                             pBufferData /*pData*/, bufferSize /*dataLength*/,
-                             NULL /*pMsg*/, 0 /*msgLength*/);
-    assert(XA_RESULT_SUCCESS == res);
-  } else {
-    // EOF or I/O error, signal EOS
-    XAAndroidBufferItem msgEos[1];
-    msgEos[0].itemKey = XA_ANDROID_ITEMKEY_EOS;
-    msgEos[0].itemSize = 0;
-    // EOS message has no parameters, so the total size of the message is the
-    // size of the key
-    //   plus the size if itemSize, both XAuint32
-    res = (*caller)->Enqueue(caller, (void*)&kEosBufferCntxt /*pBufferContext*/,
-                             NULL /*pData*/, 0 /*dataLength*/, msgEos /*pMsg*/,
-                             sizeof(XAuint32) * 2 /*msgLength*/);
-    assert(XA_RESULT_SUCCESS == res);
-    reachedEof = JNI_TRUE;
-  }
-
-exit:
-  ok = pthread_mutex_unlock(&mutex);
-  assert(0 == ok);
-  return XA_RESULT_SUCCESS;
-}
-
-// callback invoked whenever there is new or changed stream information
-static void StreamChangeCallback(XAStreamInformationItf caller,
-                                 XAuint32 eventId, XAuint32 streamIndex,
-                                 void* pEventData, void* pContext) {
-  LOGV("StreamChangeCallback called for stream %u", streamIndex);
-  // pContext was specified as NULL at RegisterStreamChangeCallback and is
-  // unused here
-  assert(NULL == pContext);
-  switch (eventId) {
-    case XA_STREAMCBEVENT_PROPERTYCHANGE: {
-      /** From spec 1.0.1:
-          "This event indicates that stream property change has occurred.
-          The streamIndex parameter identifies the stream with the property
-         change. The pEventData parameter for this event is not used and shall
-         be ignored."
-       */
-
-      XAresult res;
-      XAuint32 domain;
-      res = (*caller)->QueryStreamType(caller, streamIndex, &domain);
-      assert(XA_RESULT_SUCCESS == res);
-      switch (domain) {
-        case XA_DOMAINTYPE_VIDEO: {
-          XAVideoStreamInformation videoInfo;
-          res = (*caller)->QueryStreamInformation(caller, streamIndex,
-                                                  &videoInfo);
-          assert(XA_RESULT_SUCCESS == res);
-          LOGV(
-              "Found video size %u x %u, codec ID=%u, frameRate=%u, "
-              "bitRate=%u, duration=%u ms",
-              videoInfo.width, videoInfo.height, videoInfo.codecId,
-              videoInfo.frameRate, videoInfo.bitRate, videoInfo.duration);
-        } break;
-        default:
-          fprintf(stderr, "Unexpected domain %u\n", domain);
-          break;
-      }
-    } break;
-    default:
-      fprintf(stderr, "Unexpected stream event ID %u\n", eventId);
-      break;
-  }
-}
-
-// create the engine and output mix objects
-void Java_com_example_nativemedia_NativeMedia_createEngine(JNIEnv* env,
-                                                           jclass clazz) {
-  XAresult res;
-
-  // create engine
-  res = xaCreateEngine(&engineObject, 0, NULL, 0, NULL, NULL);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // realize the engine
-  res = (*engineObject)->Realize(engineObject, XA_BOOLEAN_FALSE);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // get the engine interface, which is needed in order to create other objects
-  res =
-      (*engineObject)->GetInterface(engineObject, XA_IID_ENGINE, &engineEngine);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // create output mix
-  res = (*engineEngine)
-            ->CreateOutputMix(engineEngine, &outputMixObject, 0, NULL, NULL);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // realize the output mix
-  res = (*outputMixObject)->Realize(outputMixObject, XA_BOOLEAN_FALSE);
-  assert(XA_RESULT_SUCCESS == res);
-}
-
-// Enqueue the initial buffers, and optionally signal a discontinuity in the
-// first buffer
-static jboolean enqueueInitialBuffers(jboolean discontinuity) {
-  /* Fill our cache.
-   * We want to read whole packets (integral multiples of MPEG2_TS_PACKET_SIZE).
-   * fread returns units of "elements" not bytes, so we ask for 1-byte elements
-   * and then check that the number of elements is a multiple of the packet
-   * size.
-   */
-  size_t bytesRead;
-  bytesRead = fread(dataCache, 1, BUFFER_SIZE * NB_BUFFERS, file);
-  if (bytesRead <= 0) {
-    // could be premature EOF or I/O error
-    return JNI_FALSE;
-  }
-  if ((bytesRead % MPEG2_TS_PACKET_SIZE) != 0) {
-    LOGV("Dropping last packet because it is not whole");
-  }
-  size_t packetsRead = bytesRead / MPEG2_TS_PACKET_SIZE;
-  LOGV("Initially queueing %zu packets", packetsRead);
-
-  /* Enqueue the content of our cache before starting to play,
-     we don't want to starve the player */
-  size_t i;
-  for (i = 0; i < NB_BUFFERS && packetsRead > 0; i++) {
-    // compute size of this buffer
-    size_t packetsThisBuffer = packetsRead;
-    if (packetsThisBuffer > PACKETS_PER_BUFFER) {
-      packetsThisBuffer = PACKETS_PER_BUFFER;
-    }
-    size_t bufferSize = packetsThisBuffer * MPEG2_TS_PACKET_SIZE;
-    XAresult res;
-    if (discontinuity) {
-      // signal discontinuity
-      XAAndroidBufferItem items[1];
-      items[0].itemKey = XA_ANDROID_ITEMKEY_DISCONTINUITY;
-      items[0].itemSize = 0;
-      // DISCONTINUITY message has no parameters,
-      //   so the total size of the message is the size of the key
-      //   plus the size if itemSize, both XAuint32
-      res = (*playerBQItf)
-                ->Enqueue(playerBQItf, NULL /*pBufferContext*/,
-                          dataCache + i * BUFFER_SIZE, bufferSize,
-                          items /*pMsg*/, sizeof(XAuint32) * 2 /*msgLength*/);
-      discontinuity = JNI_FALSE;
-    } else {
-      res = (*playerBQItf)
-                ->Enqueue(playerBQItf, NULL /*pBufferContext*/,
-                          dataCache + i * BUFFER_SIZE, bufferSize, NULL, 0);
-    }
-    assert(XA_RESULT_SUCCESS == res);
-    packetsRead -= packetsThisBuffer;
-  }
-
-  return JNI_TRUE;
-}
-
-// create streaming media player
-jboolean Java_com_example_nativemedia_NativeMedia_createStreamingMediaPlayer(
-    JNIEnv* env, jclass clazz, jobject assetMgr, jstring filename) {
-  XAresult res;
-
-  android_java_asset_manager = (*env)->NewGlobalRef(env, assetMgr);
-  android_fopen_set_asset_manager(
-      AAssetManager_fromJava(env, android_java_asset_manager));
-  // convert Java string to UTF-8
-  const char* utf8 = (*env)->GetStringUTFChars(env, filename, NULL);
-  assert(NULL != utf8);
-
-  // open the file to play
-  file = android_fopen(utf8, "rb");
-  if (file == NULL) {
-    return JNI_FALSE;
-  }
-
-  // configure data source
-  XADataLocator_AndroidBufferQueue loc_abq = {XA_DATALOCATOR_ANDROIDBUFFERQUEUE,
-                                              NB_BUFFERS};
-  XADataFormat_MIME format_mime = {XA_DATAFORMAT_MIME, XA_ANDROID_MIME_MP2TS,
-                                   XA_CONTAINERTYPE_MPEG_TS};
-  XADataSource dataSrc = {&loc_abq, &format_mime};
-
-  // configure audio sink
-  XADataLocator_OutputMix loc_outmix = {XA_DATALOCATOR_OUTPUTMIX,
-                                        outputMixObject};
-  XADataSink audioSnk = {&loc_outmix, NULL};
-
-  // configure image video sink
-  XADataLocator_NativeDisplay loc_nd = {
-      XA_DATALOCATOR_NATIVEDISPLAY,  // locatorType
-      // the video sink must be an ANativeWindow created from a Surface or
-      // SurfaceTexture
-      (void*)theNativeWindow,  // hWindow
-      // must be NULL
-      NULL  // hDisplay
-  };
-  XADataSink imageVideoSink = {&loc_nd, NULL};
-
-  // declare interfaces to use
-  XAboolean required[NB_MAXAL_INTERFACES] = {XA_BOOLEAN_TRUE, XA_BOOLEAN_TRUE,
-                                             XA_BOOLEAN_TRUE};
-  XAInterfaceID iidArray[NB_MAXAL_INTERFACES] = {
-      XA_IID_PLAY, XA_IID_ANDROIDBUFFERQUEUESOURCE, XA_IID_STREAMINFORMATION};
-
-  // create media player
-  res =
-      (*engineEngine)
-          ->CreateMediaPlayer(engineEngine, &playerObj, &dataSrc, NULL,
-                              &audioSnk, &imageVideoSink, NULL, NULL,
-                              NB_MAXAL_INTERFACES /*XAuint32 numInterfaces*/,
-                              iidArray /*const XAInterfaceID *pInterfaceIds*/,
-                              required /*const XAboolean *pInterfaceRequired*/);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // release the Java string and UTF-8
-  (*env)->ReleaseStringUTFChars(env, filename, utf8);
-
-  // realize the player
-  res = (*playerObj)->Realize(playerObj, XA_BOOLEAN_FALSE);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // get the play interface
-  res = (*playerObj)->GetInterface(playerObj, XA_IID_PLAY, &playerPlayItf);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // get the stream information interface (for video size)
-  res = (*playerObj)
-            ->GetInterface(playerObj, XA_IID_STREAMINFORMATION,
-                           &playerStreamInfoItf);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // get the volume interface
-  res = (*playerObj)->GetInterface(playerObj, XA_IID_VOLUME, &playerVolItf);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // get the Android buffer queue interface
-  res = (*playerObj)
-            ->GetInterface(playerObj, XA_IID_ANDROIDBUFFERQUEUESOURCE,
-                           &playerBQItf);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // specify which events we want to be notified of
-  res = (*playerBQItf)
-            ->SetCallbackEventsMask(playerBQItf,
-                                    XA_ANDROIDBUFFERQUEUEEVENT_PROCESSED);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // register the callback from which OpenMAX AL can retrieve the data to play
-  res = (*playerBQItf)
-            ->RegisterCallback(playerBQItf, AndroidBufferQueueCallback, NULL);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // we want to be notified of the video size once it's found, so we register a
-  // callback for that
-  res = (*playerStreamInfoItf)
-            ->RegisterStreamChangeCallback(playerStreamInfoItf,
-                                           StreamChangeCallback, NULL);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // enqueue the initial buffers
-  if (!enqueueInitialBuffers(JNI_FALSE)) {
-    return JNI_FALSE;
-  }
-
-  // prepare the player
-  res = (*playerPlayItf)->SetPlayState(playerPlayItf, XA_PLAYSTATE_PAUSED);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // set the volume
-  res = (*playerVolItf)->SetVolumeLevel(playerVolItf, 0);
-  assert(XA_RESULT_SUCCESS == res);
-
-  // start the playback
-  res = (*playerPlayItf)->SetPlayState(playerPlayItf, XA_PLAYSTATE_PLAYING);
-  assert(XA_RESULT_SUCCESS == res);
-
-  return JNI_TRUE;
-}
-
-// set the playing state for the streaming media player
-void Java_com_example_nativemedia_NativeMedia_setPlayingStreamingMediaPlayer(
-    JNIEnv* env, jclass clazz, jboolean isPlaying) {
-  XAresult res;
-
-  // make sure the streaming media player was created
-  if (NULL != playerPlayItf) {
-    // set the player's state
-    res = (*playerPlayItf)
-              ->SetPlayState(playerPlayItf, isPlaying ? XA_PLAYSTATE_PLAYING
-                                                      : XA_PLAYSTATE_PAUSED);
-    assert(XA_RESULT_SUCCESS == res);
-  }
-}
-
-// shut down the native media system
-void Java_com_example_nativemedia_NativeMedia_shutdown(JNIEnv* env,
-                                                       jclass clazz) {
-  // destroy streaming media player object, and invalidate all associated
-  // interfaces
-  if (playerObj != NULL) {
-    (*playerObj)->Destroy(playerObj);
-    playerObj = NULL;
-    playerPlayItf = NULL;
-    playerBQItf = NULL;
-    playerStreamInfoItf = NULL;
-    playerVolItf = NULL;
-  }
-
-  // destroy output mix object, and invalidate all associated interfaces
-  if (outputMixObject != NULL) {
-    (*outputMixObject)->Destroy(outputMixObject);
-    outputMixObject = NULL;
-  }
-
-  // destroy engine object, and invalidate all associated interfaces
-  if (engineObject != NULL) {
-    (*engineObject)->Destroy(engineObject);
-    engineObject = NULL;
-    engineEngine = NULL;
-  }
-
-  // close the file
-  if (file != NULL) {
-    fclose(file);
-    file = NULL;
-  }
-
-  if (android_java_asset_manager) {
-    (*env)->DeleteGlobalRef(env, android_java_asset_manager);
-    android_java_asset_manager = NULL;
-  }
-  // make sure we don't leak native windows
-  if (theNativeWindow != NULL) {
-    ANativeWindow_release(theNativeWindow);
-    theNativeWindow = NULL;
-  }
-}
-
-// set the surface
-void Java_com_example_nativemedia_NativeMedia_setSurface(JNIEnv* env,
-                                                         jclass clazz,
-                                                         jobject surface) {
-  // obtain a native window from a Java surface
-  theNativeWindow = ANativeWindow_fromSurface(env, surface);
-}
-
-// rewind the streaming media player
-void Java_com_example_nativemedia_NativeMedia_rewindStreamingMediaPlayer(
-    JNIEnv* env, jclass clazz) {
-  XAresult res;
-  XAuint32 state;
-
-  if (!playerPlayItf) {
-    return;
-  }
-  res = (*playerPlayItf)->GetPlayState(playerPlayItf, &state);
-  assert(XA_RESULT_SUCCESS == res);
-
-  if (state == XA_PLAYSTATE_PAUSED || state == XA_PLAYSTATE_STOPPED) {
-    discontinuity = JNI_TRUE;
-    return;
-  }
-
-  // make sure the streaming media player was created
-  if (NULL != playerBQItf && NULL != file) {
-    // first wait for buffers currently in queue to be drained
-    int ok;
-    ok = pthread_mutex_lock(&mutex);
-    assert(0 == ok);
-    discontinuity = JNI_TRUE;
-    // wait for discontinuity request to be observed by buffer queue callback
-    // Note: can't rewind after EOS, which we send when reaching EOF
-    // (don't send EOS if you plan to play more content through the same player)
-    while (discontinuity && !reachedEof) {
-      ok = pthread_cond_wait(&cond, &mutex);
-      assert(0 == ok);
-    }
-    ok = pthread_mutex_unlock(&mutex);
-    assert(0 == ok);
-  }
-}

native-media/app/src/main/java/com/example/nativemedia/MyGLSurfaceView.java

@@ -1,336 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.example.nativemedia;
-
-import android.graphics.SurfaceTexture;
-import android.util.Log;
-
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.FloatBuffer;
-
-import javax.microedition.khronos.egl.EGLConfig;
-import javax.microedition.khronos.opengles.GL10;
-
-import android.content.Context;
-
-import android.opengl.GLES20;
-import android.opengl.GLSurfaceView;
-import android.opengl.Matrix;
-
-import android.util.AttributeSet;
-
-public class MyGLSurfaceView extends GLSurfaceView {
-
-    MyRenderer mRenderer;
-
-    public MyGLSurfaceView(Context context) {
-        this(context, null);
-    }
-
-    public MyGLSurfaceView(Context context, AttributeSet attributeSet) {
-        super(context, attributeSet);
-        init();
-    }
-
-    private void init() {
-        setEGLContextClientVersion(2);
-        mRenderer = new MyRenderer();
-        setRenderer(mRenderer);
-    }
-
-    @Override
-    public void onPause() {
-        super.onPause();
-    }
-
-    @Override
-    public void onResume() {
-        super.onResume();
-    }
-
-    public SurfaceTexture getSurfaceTexture() {
-        return mRenderer.getSurfaceTexture();
-    }
-}
-
-class MyRenderer implements GLSurfaceView.Renderer, SurfaceTexture.OnFrameAvailableListener {
-
-    public MyRenderer() {
-        mVertices = ByteBuffer.allocateDirect(mVerticesData.length
-                * FLOAT_SIZE_BYTES).order(ByteOrder.nativeOrder()).asFloatBuffer();
-        mVertices.put(mVerticesData).position(0);
-
-        Matrix.setIdentityM(mSTMatrix, 0);
-        Matrix.setIdentityM(mMMatrix, 0);
-        Matrix.rotateM(mMMatrix, 0, 20, 0, 1, 0);
-    }
-
-    public void onDrawFrame(GL10 glUnused) {
-        synchronized(this) {
-            if (updateSurface) {
-                mSurface.updateTexImage();
-
-                mSurface.getTransformMatrix(mSTMatrix);
-                updateSurface = false;
-            }
-        }
-
-        // Ignore the passed-in GL10 interface, and use the GLES20
-        // class's static methods instead.
-        GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
-        GLES20.glUseProgram(mProgram);
-        checkGlError("glUseProgram");
-
-        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
-        GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureID);
-
-        mVertices.position(VERTICES_DATA_POS_OFFSET);
-        GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false,
-                VERTICES_DATA_STRIDE_BYTES, mVertices);
-        checkGlError("glVertexAttribPointer maPosition");
-        GLES20.glEnableVertexAttribArray(maPositionHandle);
-        checkGlError("glEnableVertexAttribArray maPositionHandle");
-
-        mVertices.position(VERTICES_DATA_UV_OFFSET);
-        GLES20.glVertexAttribPointer(maTextureHandle, 3, GLES20.GL_FLOAT, false,
-                VERTICES_DATA_STRIDE_BYTES, mVertices);
-        checkGlError("glVertexAttribPointer maTextureHandle");
-        GLES20.glEnableVertexAttribArray(maTextureHandle);
-        checkGlError("glEnableVertexAttribArray maTextureHandle");
-
-        Matrix.multiplyMM(mMVPMatrix, 0, mVMatrix, 0, mMMatrix, 0);
-        Matrix.multiplyMM(mMVPMatrix, 0, mProjMatrix, 0, mMVPMatrix, 0);
-
-        GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, mMVPMatrix, 0);
-        GLES20.glUniformMatrix4fv(muSTMatrixHandle, 1, false, mSTMatrix, 0);
-
-        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
-        checkGlError("glDrawArrays");
-    }
-
-    public void onSurfaceChanged(GL10 glUnused, int width, int height) {
-        // Ignore the passed-in GL10 interface, and use the GLES20
-        // class's static methods instead.
-        GLES20.glViewport(0, 0, width, height);
-        mRatio = (float) width / height;
-        Matrix.frustumM(mProjMatrix, 0, -mRatio, mRatio, -1, 1, 3, 7);
-    }
-
-    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {
-        // Ignore the passed-in GL10 interface, and use the GLES20
-        // class's static methods instead.
-
-        /* Set up alpha blending and an Android background color */
-        GLES20.glEnable(GLES20.GL_BLEND);
-        GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
-        GLES20.glClearColor(0.643f, 0.776f, 0.223f, 1.0f);
-
-        /* Set up shaders and handles to their variables */
-        mProgram = createProgram(mVertexShader, mFragmentShader);
-        if (mProgram == 0) {
-            return;
-        }
-        maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition");
-        checkGlError("glGetAttribLocation aPosition");
-        if (maPositionHandle == -1) {
-            throw new RuntimeException("Could not get attrib location for aPosition");
-        }
-        maTextureHandle = GLES20.glGetAttribLocation(mProgram, "aTextureCoord");
-        checkGlError("glGetAttribLocation aTextureCoord");
-        if (maTextureHandle == -1) {
-            throw new RuntimeException("Could not get attrib location for aTextureCoord");
-        }
-
-        muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");
-        checkGlError("glGetUniformLocation uMVPMatrix");
-        if (muMVPMatrixHandle == -1) {
-            throw new RuntimeException("Could not get attrib location for uMVPMatrix");
-        }
-
-        muSTMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uSTMatrix");
-        checkGlError("glGetUniformLocation uSTMatrix");
-        if (muMVPMatrixHandle == -1) {
-            throw new RuntimeException("Could not get attrib location for uSTMatrix");
-        }
-
-        checkGlError("glGetUniformLocation uCRatio");
-        if (muMVPMatrixHandle == -1) {
-            throw new RuntimeException("Could not get attrib location for uCRatio");
-        }
-
-        /*
-         * Create our texture. This has to be done each time the
-         * surface is created.
-         */
-
-        int[] textures = new int[1];
-        GLES20.glGenTextures(1, textures, 0);
-
-        mTextureID = textures[0];
-        GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureID);
-        checkGlError("glBindTexture mTextureID");
-
-        // Can't do mipmapping with camera source
-        GLES20.glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER,
-                GLES20.GL_NEAREST);
-        GLES20.glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER,
-                GLES20.GL_LINEAR);
-        // Clamp to edge is the only option
-        GLES20.glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S,
-                GLES20.GL_CLAMP_TO_EDGE);
-        GLES20.glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T,
-                GLES20.GL_CLAMP_TO_EDGE);
-        checkGlError("glTexParameteri mTextureID");
-
-        /*
-         * Create the SurfaceTexture that will feed this textureID, and pass it to the camera
-         */
-
-        mSurface = new SurfaceTexture(mTextureID);
-        mSurface.setOnFrameAvailableListener(this);
-
-        Matrix.setLookAtM(mVMatrix, 0, 0, 0, 4f, 0f, 0f, 0f, 0f, 1.0f, 0.0f);
-
-        synchronized(this) {
-            updateSurface = false;
-        }
-    }
-
-    synchronized public void onFrameAvailable(SurfaceTexture surface) {
-        /* For simplicity, SurfaceTexture calls here when it has new
-         * data available.  Call may come in from some random thread,
-         * so let's be safe and use synchronize. No OpenGL calls can be done here.
-         */
-        updateSurface = true;
-        //Log.v(TAG, "onFrameAvailable " + surface.getTimestamp());
-    }
-
-    private int loadShader(int shaderType, String source) {
-        int shader = GLES20.glCreateShader(shaderType);
-        if (shader != 0) {
-            GLES20.glShaderSource(shader, source);
-            GLES20.glCompileShader(shader);
-            int[] compiled = new int[1];
-            GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
-            if (compiled[0] == 0) {
-                Log.e(TAG, "Could not compile shader " + shaderType + ":");
-                Log.e(TAG, GLES20.glGetShaderInfoLog(shader));
-                GLES20.glDeleteShader(shader);
-                shader = 0;
-            }
-        }
-        return shader;
-    }
-
-    private int createProgram(String vertexSource, String fragmentSource) {
-        int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);
-        if (vertexShader == 0) {
-            return 0;
-        }
-        int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);
-        if (pixelShader == 0) {
-            return 0;
-        }
-
-        int program = GLES20.glCreateProgram();
-        if (program != 0) {
-            GLES20.glAttachShader(program, vertexShader);
-            checkGlError("glAttachShader");
-            GLES20.glAttachShader(program, pixelShader);
-            checkGlError("glAttachShader");
-            GLES20.glLinkProgram(program);
-            int[] linkStatus = new int[1];
-            GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0);
-            if (linkStatus[0] != GLES20.GL_TRUE) {
-                Log.e(TAG, "Could not link program: ");
-                Log.e(TAG, GLES20.glGetProgramInfoLog(program));
-                GLES20.glDeleteProgram(program);
-                program = 0;
-            }
-        }
-        return program;
-    }
-
-    private void checkGlError(String op) {
-        int error;
-        while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
-            Log.e(TAG, op + ": glError " + error);
-            throw new RuntimeException(op + ": glError " + error);
-        }
-    }
-
-    private static final int FLOAT_SIZE_BYTES = 4;
-    private static final int VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES;
-    private static final int VERTICES_DATA_POS_OFFSET = 0;
-    private static final int VERTICES_DATA_UV_OFFSET = 3;
-    private final float[] mVerticesData = {
-        // X, Y, Z, U, V
-        -1.0f, -1.0f, 0, 0.f, 0.f,
-        1.0f, -1.0f, 0, 1.f, 0.f,
-        -1.0f,  1.0f, 0, 0.f, 1.f,
-        1.0f,   1.0f, 0, 1.f, 1.f,
-    };
-
-    private FloatBuffer mVertices;
-
-    private final String mVertexShader =
-        "uniform mat4 uMVPMatrix;\n" +
-        "uniform mat4 uSTMatrix;\n" +
-        "attribute vec4 aPosition;\n" +
-        "attribute vec4 aTextureCoord;\n" +
-        "varying vec2 vTextureCoord;\n" +
-        "void main() {\n" +
-        "  gl_Position = uMVPMatrix * aPosition;\n" +
-        "  vTextureCoord = (uSTMatrix * aTextureCoord).xy;\n" +
-        "}\n";
-
-    private final String mFragmentShader =
-        "#extension GL_OES_EGL_image_external : require\n" +
-        "precision mediump float;\n" +
-        "varying vec2 vTextureCoord;\n" +
-        "uniform samplerExternalOES sTexture;\n" +
-        "void main() {\n" +
-        "  gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +
-        "}\n";
-
-    private float[] mMVPMatrix = new float[16];
-    private float[] mProjMatrix = new float[16];
-    private float[] mMMatrix = new float[16];
-    private float[] mVMatrix = new float[16];
-    private float[] mSTMatrix = new float[16];
-
-    private int mProgram;
-    private int mTextureID;
-    private int muMVPMatrixHandle;
-    private int muSTMatrixHandle;
-    private int maPositionHandle;
-    private int maTextureHandle;
-
-    private float mRatio = 1.0f;
-    private SurfaceTexture mSurface;
-    private boolean updateSurface = false;
-
-    private static final String TAG = "MyRenderer";
-
-    // Magic key
-    private static final int GL_TEXTURE_EXTERNAL_OES = 0x8D65;
-
-    public SurfaceTexture getSurfaceTexture() {
-        return mSurface;
-    }
-}

native-media/app/src/main/java/com/example/nativemedia/NativeMedia.java

@@ -1,421 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.example.nativemedia;
-
-import android.app.Activity;
-import android.content.res.AssetFileDescriptor;
-import android.content.res.AssetManager;
-import android.graphics.SurfaceTexture;
-import android.media.MediaPlayer;
-import android.os.Bundle;
-import android.util.Log;
-import android.view.Surface;
-import android.view.SurfaceHolder;
-import android.view.SurfaceView;
-import android.view.View;
-import android.widget.AdapterView;
-import android.widget.ArrayAdapter;
-import android.widget.Button;
-import android.widget.Spinner;
-
-import java.io.FileDescriptor;
-import java.io.IOException;
-
-public class NativeMedia extends Activity {
-    static final String TAG = "NativeMedia";
-
-    String mSourceString = null;
-    String mSinkString = null;
-
-    // member variables for Java media player
-    MediaPlayer mMediaPlayer;
-    boolean mMediaPlayerIsPrepared = false;
-    SurfaceView mSurfaceView1;
-    SurfaceHolder mSurfaceHolder1;
-
-    // member variables for native media player
-    boolean mIsPlayingStreaming = false;
-    SurfaceView mSurfaceView2;
-    SurfaceHolder mSurfaceHolder2;
-
-    VideoSink mSelectedVideoSink;
-    VideoSink mJavaMediaPlayerVideoSink;
-    VideoSink mNativeMediaPlayerVideoSink;
-
-    SurfaceHolderVideoSink mSurfaceHolder1VideoSink, mSurfaceHolder2VideoSink;
-    GLViewVideoSink mGLView1VideoSink, mGLView2VideoSink;
-
-    AssetManager  assetMgr;
-
-    /** Called when the activity is first created. */
-    @Override
-    public void onCreate(Bundle icicle) {
-        super.onCreate(icicle);
-        setContentView(R.layout.main);
-
-        // get application's assetManager to avoid being garbage-collected.
-        assetMgr = getApplication().getAssets();
-
-        mGLView1 = (MyGLSurfaceView) findViewById(R.id.glsurfaceview1);
-        mGLView2 = (MyGLSurfaceView) findViewById(R.id.glsurfaceview2);
-
-        // initialize native media system
-        createEngine();
-
-        // set up the Surface 1 video sink
-        mSurfaceView1 = (SurfaceView) findViewById(R.id.surfaceview1);
-        mSurfaceHolder1 = mSurfaceView1.getHolder();
-
-        mSurfaceHolder1.addCallback(new SurfaceHolder.Callback() {
-
-            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
-                Log.v(TAG, "surfaceChanged format=" + format + ", width=" + width + ", height="
-                        + height);
-            }
-
-            public void surfaceCreated(SurfaceHolder holder) {
-                Log.v(TAG, "surfaceCreated");
-                setSurface(holder.getSurface());
-            }
-
-            public void surfaceDestroyed(SurfaceHolder holder) {
-                Log.v(TAG, "surfaceDestroyed");
-            }
-
-        });
-
-        // set up the Surface 2 video sink
-        mSurfaceView2 = (SurfaceView) findViewById(R.id.surfaceview2);
-        mSurfaceHolder2 = mSurfaceView2.getHolder();
-
-        mSurfaceHolder2.addCallback(new SurfaceHolder.Callback() {
-
-            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
-                Log.v(TAG, "surfaceChanged format=" + format + ", width=" + width + ", height="
-                        + height);
-            }
-
-            public void surfaceCreated(SurfaceHolder holder) {
-                Log.v(TAG, "surfaceCreated");
-                setSurface(holder.getSurface());
-            }
-
-            public void surfaceDestroyed(SurfaceHolder holder) {
-                Log.v(TAG, "surfaceDestroyed");
-            }
-
-        });
-
-        // create Java media player
-        mMediaPlayer = new MediaPlayer();
-
-        // set up Java media player listeners
-        mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
-
-            public void onPrepared(MediaPlayer mediaPlayer) {
-                int width = mediaPlayer.getVideoWidth();
-                int height = mediaPlayer.getVideoHeight();
-                Log.v(TAG, "onPrepared width=" + width + ", height=" + height);
-                if (width != 0 && height != 0 && mJavaMediaPlayerVideoSink != null) {
-                    mJavaMediaPlayerVideoSink.setFixedSize(width, height);
-                }
-                mMediaPlayerIsPrepared = true;
-                mediaPlayer.start();
-            }
-
-        });
-
-        mMediaPlayer.setOnVideoSizeChangedListener(new MediaPlayer.OnVideoSizeChangedListener() {
-
-            public void onVideoSizeChanged(MediaPlayer mediaPlayer, int width, int height) {
-                Log.v(TAG, "onVideoSizeChanged width=" + width + ", height=" + height);
-                if (width != 0 && height != 0 && mJavaMediaPlayerVideoSink != null) {
-                    mJavaMediaPlayerVideoSink.setFixedSize(width, height);
-                }
-            }
-
-        });
-
-        // initialize content source spinner
-        Spinner sourceSpinner = (Spinner) findViewById(R.id.source_spinner);
-        ArrayAdapter<CharSequence> sourceAdapter = ArrayAdapter.createFromResource(
-                this, R.array.source_array, android.R.layout.simple_spinner_item);
-        sourceAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
-        sourceSpinner.setAdapter(sourceAdapter);
-        sourceSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
-
-            public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
-                mSourceString = parent.getItemAtPosition(pos).toString();
-                Log.v(TAG, "onItemSelected " + mSourceString);
-            }
-
-            public void onNothingSelected(AdapterView parent) {
-                Log.v(TAG, "onNothingSelected");
-                mSourceString = null;
-            }
-
-        });
-
-        // initialize video sink spinner
-        Spinner sinkSpinner = (Spinner) findViewById(R.id.sink_spinner);
-        ArrayAdapter<CharSequence> sinkAdapter = ArrayAdapter.createFromResource(
-                this, R.array.sink_array, android.R.layout.simple_spinner_item);
-        sinkAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
-        sinkSpinner.setAdapter(sinkAdapter);
-        sinkSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
-
-            public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
-                mSinkString = parent.getItemAtPosition(pos).toString();
-                Log.v(TAG, "onItemSelected " + mSinkString);
-                if ("Surface 1".equals(mSinkString)) {
-                    if (mSurfaceHolder1VideoSink == null) {
-                        mSurfaceHolder1VideoSink = new SurfaceHolderVideoSink(mSurfaceHolder1);
-                    }
-                    mSelectedVideoSink = mSurfaceHolder1VideoSink;
-                } else if ("Surface 2".equals(mSinkString)) {
-                    if (mSurfaceHolder2VideoSink == null) {
-                        mSurfaceHolder2VideoSink = new SurfaceHolderVideoSink(mSurfaceHolder2);
-                    }
-                    mSelectedVideoSink = mSurfaceHolder2VideoSink;
-                } else if ("SurfaceTexture 1".equals(mSinkString)) {
-                    if (mGLView1VideoSink == null) {
-                        mGLView1VideoSink = new GLViewVideoSink(mGLView1);
-                    }
-                    mSelectedVideoSink = mGLView1VideoSink;
-                } else if ("SurfaceTexture 2".equals(mSinkString)) {
-                    if (mGLView2VideoSink == null) {
-                        mGLView2VideoSink = new GLViewVideoSink(mGLView2);
-                    }
-                    mSelectedVideoSink = mGLView2VideoSink;
-                }
-            }
-
-            public void onNothingSelected(AdapterView parent) {
-                Log.v(TAG, "onNothingSelected");
-                mSinkString = null;
-                mSelectedVideoSink = null;
-            }
-
-        });
-
-        // initialize button click handlers
-
-        // Java MediaPlayer start/pause
-
-        ((Button) findViewById(R.id.start_java)).setOnClickListener(new View.OnClickListener() {
-
-            public void onClick(View view) {
-                if (mJavaMediaPlayerVideoSink == null) {
-                    if (mSelectedVideoSink == null) {
-                        return;
-                    }
-                    mSelectedVideoSink.useAsSinkForJava(mMediaPlayer);
-                    mJavaMediaPlayerVideoSink = mSelectedVideoSink;
-                }
-                if (!mMediaPlayerIsPrepared) {
-                    if (mSourceString != null) {
-                        try {
-                            AssetFileDescriptor clipFd = assetMgr.openFd(mSourceString);
-                            mMediaPlayer.setDataSource(clipFd.getFileDescriptor(),
-                                                       clipFd.getStartOffset(),
-                                                       clipFd.getLength());
-                            clipFd.close();
-                        } catch (IOException e) {
-                            Log.e(TAG, "IOException " + e);
-                        }
-                        mMediaPlayer.prepareAsync();
-                    }
-                } else if (mMediaPlayer.isPlaying()) {
-                    mMediaPlayer.pause();
-                } else {
-                    mMediaPlayer.start();
-                }
-            }
-
-        });
-
-        // native MediaPlayer start/pause
-
-        ((Button) findViewById(R.id.start_native)).setOnClickListener(new View.OnClickListener() {
-
-            boolean created = false;
-            public void onClick(View view) {
-                if (!created) {
-                    if (mNativeMediaPlayerVideoSink == null) {
-                        if (mSelectedVideoSink == null) {
-                            return;
-                        }
-                        mSelectedVideoSink.useAsSinkForNative();
-                        mNativeMediaPlayerVideoSink = mSelectedVideoSink;
-                    }
-                    if (mSourceString != null) {
-                        created = createStreamingMediaPlayer(assetMgr, mSourceString);
-                    }
-                }
-                if (created) {
-                    mIsPlayingStreaming = !mIsPlayingStreaming;
-                    setPlayingStreamingMediaPlayer(mIsPlayingStreaming);
-                }
-            }
-
-        });
-
-        // finish
-
-        ((Button) findViewById(R.id.finish)).setOnClickListener(new View.OnClickListener() {
-
-            public void onClick(View view) {
-                finish();
-            }
-
-        });
-
-        // Java MediaPlayer rewind
-
-        ((Button) findViewById(R.id.rewind_java)).setOnClickListener(new View.OnClickListener() {
-
-            public void onClick(View view) {
-                if (mMediaPlayerIsPrepared) {
-                    mMediaPlayer.seekTo(0);
-                }
-            }
-
-        });
-
-        // native MediaPlayer rewind
-
-        ((Button) findViewById(R.id.rewind_native)).setOnClickListener(new View.OnClickListener() {
-
-            public void onClick(View view) {
-                if (mNativeMediaPlayerVideoSink != null) {
-                    rewindStreamingMediaPlayer();
-                }
-            }
-
-        });
-
-    }
-
-    /** Called when the activity is about to be paused. */
-    @Override
-    protected void onPause()
-    {
-        mIsPlayingStreaming = false;
-        setPlayingStreamingMediaPlayer(false);
-        mGLView1.onPause();
-        mGLView2.onPause();
-        super.onPause();
-    }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        mGLView1.onResume();
-        mGLView2.onResume();
-    }
-
-    /** Called when the activity is about to be destroyed. */
-    @Override
-    protected void onDestroy()
-    {
-        shutdown();
-        super.onDestroy();
-    }
-
-    private MyGLSurfaceView mGLView1, mGLView2;
-
-    /** Native methods, implemented in jni folder */
-    public static native void createEngine();
-    public static native boolean createStreamingMediaPlayer(AssetManager assetManager,
-                                                            String filename);
-    public static native void setPlayingStreamingMediaPlayer(boolean isPlaying);
-    public static native void shutdown();
-    public static native void setSurface(Surface surface);
-    public static native void rewindStreamingMediaPlayer();
-
-    /** Load jni .so on initialization */
-    static {
-         System.loadLibrary("native-media-jni");
-    }
-
-    // VideoSink abstracts out the difference between Surface and SurfaceTexture
-    // aka SurfaceHolder and GLSurfaceView
-    static abstract class VideoSink {
-
-        abstract void setFixedSize(int width, int height);
-        abstract void useAsSinkForJava(MediaPlayer mediaPlayer);
-        abstract void useAsSinkForNative();
-
-    }
-
-    static class SurfaceHolderVideoSink extends VideoSink {
-
-        private final SurfaceHolder mSurfaceHolder;
-
-        SurfaceHolderVideoSink(SurfaceHolder surfaceHolder) {
-            mSurfaceHolder = surfaceHolder;
-        }
-
-        void setFixedSize(int width, int height) {
-            mSurfaceHolder.setFixedSize(width, height);
-        }
-
-        void useAsSinkForJava(MediaPlayer mediaPlayer) {
-            // Use the newer MediaPlayer.setSurface(Surface) since API level 14
-            // instead of MediaPlayer.setDisplay(mSurfaceHolder) since API level 1,
-            // because setSurface also works with a Surface derived from a SurfaceTexture.
-            Surface s = mSurfaceHolder.getSurface();
-            mediaPlayer.setSurface(s);
-            s.release();
-        }
-
-        void useAsSinkForNative() {
-            Surface s = mSurfaceHolder.getSurface();
-            setSurface(s);
-            s.release();
-        }
-
-    }
-
-    static class GLViewVideoSink extends VideoSink {
-
-        private final MyGLSurfaceView mMyGLSurfaceView;
-
-        GLViewVideoSink(MyGLSurfaceView myGLSurfaceView) {
-            mMyGLSurfaceView = myGLSurfaceView;
-        }
-
-        void setFixedSize(int width, int height) {
-        }
-
-        void useAsSinkForJava(MediaPlayer mediaPlayer) {
-            SurfaceTexture st = mMyGLSurfaceView.getSurfaceTexture();
-            Surface s = new Surface(st);
-            mediaPlayer.setSurface(s);
-            s.release();
-        }
-
-        void useAsSinkForNative() {
-            SurfaceTexture st = mMyGLSurfaceView.getSurfaceTexture();
-            Surface s = new Surface(st);
-            setSurface(s);
-            s.release();
-        }
-
-    }
-
-}

native-media/app/src/main/res/layout/main.xml

@@ -1,133 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
-    android:layout_width="fill_parent"
-    android:layout_height="fill_parent"
-    >
-<TextView
-    android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
-    android:text="@string/hello"
-    />
-<TextView
-    android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
-    android:text="@string/source_select"
-    />
-<Spinner
-    android:id="@+id/source_spinner"
-    android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
-    android:text="@string/source_prompt"
-    />
-<TextView
-    android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
-    android:text="@string/sink_select"
-    />
-<Spinner
-    android:id="@+id/sink_spinner"
-    android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
-    android:text="@string/sink_prompt"
-    />
-
-<LinearLayout
-    android:orientation="horizontal"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    >
-    <Button
-        android:id="@+id/start_java"
-        android:text="@string/start_java"
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        />
-    <Button
-        android:id="@+id/start_native"
-        android:text="@string/start_native"
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        />
-    <Button
-        android:id="@+id/finish"
-        android:text="@string/finish"
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        />
-</LinearLayout>
-
-<LinearLayout
-    android:orientation="horizontal"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    >
-    <Button
-        android:id="@+id/rewind_java"
-        android:text="@string/rewind_java"
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        />
-    <Button
-        android:id="@+id/rewind_native"
-        android:text="@string/rewind_native"
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        />
-</LinearLayout>
-
-<LinearLayout
-    android:orientation="horizontal"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    >
-    <TextView
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        android:text="S1"
-        />
-    <SurfaceView
-        android:id="@+id/surfaceview1"
-        android:layout_width="320px"
-        android:layout_height="240px"
-        />
-    <TextView
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        android:text="S2"
-        />
-    <SurfaceView
-        android:id="@+id/surfaceview2"
-        android:layout_width="400px"
-        android:layout_height="224px"
-        />
-</LinearLayout>
-
-<LinearLayout
-    android:orientation="horizontal"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    >
-    <TextView
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        android:text="ST1"
-        />
-    <com.example.nativemedia.MyGLSurfaceView
-        android:id="@+id/glsurfaceview1"
-        android:layout_width="320px"
-        android:layout_height="240px"
-        />
-    <TextView
-        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
-        android:text="ST2"
-        />
-    <com.example.nativemedia.MyGLSurfaceView
-        android:id="@+id/glsurfaceview2"
-        android:layout_width="320px"
-        android:layout_height="240px"
-        />
-</LinearLayout>
-
-</LinearLayout>

native-media/app/src/main/res/values/strings.xml

@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string name="hello">Hello, Android, using native media!</string>
-    <string name="app_name">NativeMedia</string>
-
-    <string name="start_java">Start/Pause\nJava MediaPlayer</string>
-    <string name="start_native">Start/Pause\nnative MediaPlayer</string>
-    <string name="finish">Finish</string>
-
-    <string name="rewind_java">Rewind\nJava MediaPlayer</string>
-    <string name="rewind_native">Rewind\nnative MediaPlayer</string>
-
-    <string name="source_select">Please select the media source</string>
-    <string name="source_prompt">Media source</string>
-    <string-array name="source_array">
-        <item>clips/NativeMedia.ts</item>
-    </string-array>
-
-    <string name="sink_select">Please select the video sink</string>
-    <string name="sink_prompt">Video sink</string>
-    <string-array name="sink_array">
-        <item>Surface 1</item>
-        <item>Surface 2</item>
-        <item>SurfaceTexture 1</item>
-        <item>SurfaceTexture 2</item>
-    </string-array>
-    <string name="error_creation">Error creating player:
-        check media file is copied to android device</string>
-</resources>

native-plasma/README.md

@@ -1,60 +0,0 @@
-# Native Plasma
-
-Native Plasma is an Android sample that renders a plasma effect in a Bitmap from
-C code using
-[Native Activity](http://developer.android.com/reference/android/app/NativeActivity.html).
-
-This sample uses the new
-[Android Studio CMake plugin](http://tools.android.com/tech-docs/external-c-builds)
-with C++ support.
-
-## Pre-requisites
-
-- Android Studio 2.2+ with [NDK](https://developer.android.com/ndk/) bundle.
-
-## Getting Started
-
-1. [Download Android Studio](http://developer.android.com/sdk/index.html)
-1. Launch Android Studio.
-1. Open the sample directory.
-1. Open *File/Project Structure...*
-
-- Click *Download* or *Select NDK location*.
-
-1. Click *Tools/Android/Sync Project with Gradle Files*.
-1. Click *Run/Run 'app'*.
-
-## Screenshots
-
-![screenshot](screenshot.png)
-
-## Support
-
-If you've found an error in these samples, please
-[file an issue](https://github.com/googlesamples/android-ndk/issues/new).
-
-Patches are encouraged, and may be submitted by
-[forking this project](https://github.com/googlesamples/android-ndk/fork) and
-submitting a pull request through GitHub. Please see
-[CONTRIBUTING.md](../CONTRIBUTING.md) for more details.
-
-- [Stack Overflow](http://stackoverflow.com/questions/tagged/android-ndk)
-- [Android Tools Feedbacks](http://tools.android.com/feedback)
-
-## License
-
-Copyright 2015 Google, Inc.
-
-Licensed to the Apache Software Foundation (ASF) under one or more contributor
-license agreements. See the NOTICE file distributed with this work for
-additional information regarding copyright ownership. The ASF licenses this file
-to you under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software distributed
-under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-CONDITIONS OF ANY KIND, either express or implied. See the License for the
-specific language governing permissions and limitations under the License.

native-plasma/app/build.gradle

@@ -1,17 +0,0 @@
-plugins {
-    id "ndksamples.android.application"
-}
-
-android {
-    namespace 'com.example.native_plasma'
-
-    defaultConfig {
-        applicationId 'com.example.native_plasma'
-    }
-
-    externalNativeBuild {
-        cmake {
-            path 'src/main/cpp/CMakeLists.txt'
-        }
-    }
-}

native-plasma/app/src/main/AndroidManifest.xml

@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    android:versionCode="1"
-          android:versionName="1.0">
-  <application
-      android:allowBackup="false"
-      android:fullBackupContent="false"
-      android:icon="@mipmap/ic_launcher"
-      android:label="@string/app_name"
-      android:hasCode="false">
-    <activity android:name="android.app.NativeActivity"
-              android:label="@string/app_name"
-        android:exported="true">
-      <meta-data android:name="android.app.lib_name"
-                 android:value="native-plasma" />
-      <intent-filter>
-        <action android:name="android.intent.action.MAIN" />
-        <category android:name="android.intent.category.LAUNCHER" />
-      </intent-filter>
-    </activity>
-  </application>
-</manifest>

native-plasma/app/src/main/cpp/CMakeLists.txt

@@ -1,41 +0,0 @@
-#
-# Copyright (C)  The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-cmake_minimum_required(VERSION 3.22.1)
-project(NativePlasma LANGUAGES C)
-
-# build native_app_glue as a static lib
-add_library(native_app_glue STATIC
-    ${ANDROID_NDK}/sources/android/native_app_glue/android_native_app_glue.c)
-
-# now build app's shared lib
-add_library(native-plasma SHARED
-    plasma.c)
-
-# Export ANativeActivity_onCreate(),

-# Refer to: https://github.com/android-ndk/ndk/issues/381.
-set(CMAKE_SHARED_LINKER_FLAGS
-    "${CMAKE_SHARED_LINKER_FLAGS} -u ANativeActivity_onCreate")
-
-target_include_directories(native-plasma PRIVATE
-    ${ANDROID_NDK}/sources/android/native_app_glue)
-
-# add lib dependencies
-target_link_libraries(native-plasma
-    android
-    native_app_glue
-    log
-    m)

native-plasma/app/src/main/cpp/plasma.c

@@ -1,480 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <android/log.h>
-#include <android_native_app_glue.h>
-#include <errno.h>
-#include <jni.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/time.h>
-#include <time.h>
-
-#define LOG_TAG "libplasma"
-#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
-#define LOGW(...) __android_log_print(ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)
-#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
-
-/* Set to 1 to enable debug log traces. */
-#define DEBUG 0
-
-/* Set to 1 to optimize memory stores when generating plasma. */
-#define OPTIMIZE_WRITES 1
-
-/* Return current time in milliseconds */
-static double now_ms(void) {
-  struct timeval tv;
-  gettimeofday(&tv, NULL);
-  return tv.tv_sec * 1000. + tv.tv_usec / 1000.;
-}
-
-/* We're going to perform computations for every pixel of the target
- * bitmap. floating-point operations are very slow on ARMv5, and not
- * too bad on ARMv7 with the exception of trigonometric functions.
- *
- * For better performance on all platforms, we're going to use fixed-point
- * arithmetic and all kinds of tricks
- */
-
-typedef int32_t Fixed;
-
-#define FIXED_BITS 16
-#define FIXED_ONE (1 << FIXED_BITS)
-#define FIXED_AVERAGE(x, y) (((x) + (y)) >> 1)
-
-#define FIXED_FROM_INT(x) ((x) << FIXED_BITS)
-#define FIXED_TO_INT(x) ((x) >> FIXED_BITS)
-
-#define FIXED_FROM_FLOAT(x) ((Fixed)((x) * FIXED_ONE))
-#define FIXED_TO_FLOAT(x) ((x) / (1. * FIXED_ONE))
-
-#define FIXED_MUL(x, y) (((int64_t)(x) * (y)) >> FIXED_BITS)
-#define FIXED_DIV(x, y) (((int64_t)(x) * FIXED_ONE) / (y))
-
-#define FIXED_DIV2(x) ((x) >> 1)
-#define FIXED_AVERAGE(x, y) (((x) + (y)) >> 1)
-
-#define FIXED_FRAC(x) ((x) & ((1 << FIXED_BITS) - 1))
-#define FIXED_TRUNC(x) ((x) & ~((1 << FIXED_BITS) - 1))
-
-#define FIXED_FROM_INT_FLOAT(x, f) (Fixed)((x) * (FIXED_ONE * (f)))
-
-typedef int32_t Angle;
-
-#define ANGLE_BITS 9
-
-#if ANGLE_BITS < 8
-#error ANGLE_BITS must be at least 8
-#endif
-
-#define ANGLE_2PI (1 << ANGLE_BITS)
-#define ANGLE_PI (1 << (ANGLE_BITS - 1))
-#define ANGLE_PI2 (1 << (ANGLE_BITS - 2))
-#define ANGLE_PI4 (1 << (ANGLE_BITS - 3))
-
-#define ANGLE_FROM_FLOAT(x) (Angle)((x) * ANGLE_PI / M_PI)
-#define ANGLE_TO_FLOAT(x) ((x) * M_PI / ANGLE_PI)
-
-#if ANGLE_BITS <= FIXED_BITS
-#define ANGLE_FROM_FIXED(x) (Angle)((x) >> (FIXED_BITS - ANGLE_BITS))
-#define ANGLE_TO_FIXED(x) (Fixed)((x) << (FIXED_BITS - ANGLE_BITS))
-#else
-#define ANGLE_FROM_FIXED(x) (Angle)((x) << (ANGLE_BITS - FIXED_BITS))
-#define ANGLE_TO_FIXED(x) (Fixed)((x) >> (ANGLE_BITS - FIXED_BITS))
-#endif
-
-static Fixed angle_sin_tab[ANGLE_2PI + 1];
-
-static void init_angles(void) {
-  int nn;
-  for (nn = 0; nn < ANGLE_2PI + 1; nn++) {
-    double radians = nn * M_PI / ANGLE_PI;
-    angle_sin_tab[nn] = FIXED_FROM_FLOAT(sin(radians));
-  }
-}
-
-static __inline__ Fixed angle_sin(Angle a) {
-  return angle_sin_tab[(uint32_t)a & (ANGLE_2PI - 1)];
-}
-
-static __inline__ Fixed angle_cos(Angle a) { return angle_sin(a + ANGLE_PI2); }
-
-static __inline__ Fixed fixed_sin(Fixed f) {
-  return angle_sin(ANGLE_FROM_FIXED(f));
-}
-
-static __inline__ Fixed fixed_cos(Fixed f) {
-  return angle_cos(ANGLE_FROM_FIXED(f));
-}
-
-/* Color palette used for rendering the plasma */
-#define PALETTE_BITS 8
-#define PALETTE_SIZE (1 << PALETTE_BITS)
-
-#if PALETTE_BITS > FIXED_BITS
-#error PALETTE_BITS must be smaller than FIXED_BITS
-#endif
-
-static uint16_t palette[PALETTE_SIZE];
-
-static uint16_t make565(int red, int green, int blue) {
-  return (uint16_t)(((red << 8) & 0xf800) | ((green << 3) & 0x07e0) |
-                    ((blue >> 3) & 0x001f));
-}
-
-static void init_palette(void) {
-  int nn, mm = 0;
-  /* fun with colors */
-  for (nn = 0; nn < PALETTE_SIZE / 4; nn++) {
-    int jj = (nn - mm) * 4 * 255 / PALETTE_SIZE;
-    palette[nn] = make565(255, jj, 255 - jj);
-  }
-
-  for (mm = nn; nn < PALETTE_SIZE / 2; nn++) {
-    int jj = (nn - mm) * 4 * 255 / PALETTE_SIZE;
-    palette[nn] = make565(255 - jj, 255, jj);
-  }
-
-  for (mm = nn; nn < PALETTE_SIZE * 3 / 4; nn++) {
-    int jj = (nn - mm) * 4 * 255 / PALETTE_SIZE;
-    palette[nn] = make565(0, 255 - jj, 255);
-  }
-
-  for (mm = nn; nn < PALETTE_SIZE; nn++) {
-    int jj = (nn - mm) * 4 * 255 / PALETTE_SIZE;
-    palette[nn] = make565(jj, 0, 255);
-  }
-}
-
-static __inline__ uint16_t palette_from_fixed(Fixed x) {
-  if (x < 0) x = -x;
-  if (x >= FIXED_ONE) x = FIXED_ONE - 1;
-  int idx = FIXED_FRAC(x) >> (FIXED_BITS - PALETTE_BITS);
-  return palette[idx & (PALETTE_SIZE - 1)];
-}
-
-/* Angles expressed as fixed point radians */
-
-static void init_tables(void) {
-  init_palette();
-  init_angles();
-}
-
-static void fill_plasma(ANativeWindow_Buffer* buffer, double t) {
-  Fixed yt1 = FIXED_FROM_FLOAT(t / 1230.);
-  Fixed yt2 = yt1;
-  Fixed xt10 = FIXED_FROM_FLOAT(t / 3000.);
-  Fixed xt20 = xt10;
-
-#define YT1_INCR FIXED_FROM_FLOAT(1 / 100.)
-#define YT2_INCR FIXED_FROM_FLOAT(1 / 163.)
-
-  void* pixels = buffer->bits;
-  // LOGI("width=%d height=%d stride=%d format=%d", buffer->width,
-  // buffer->height,
-  //         buffer->stride, buffer->format);
-
-  int yy;
-  for (yy = 0; yy < buffer->height; yy++) {
-    uint16_t* line = (uint16_t*)pixels;
-    Fixed base = fixed_sin(yt1) + fixed_sin(yt2);
-    Fixed xt1 = xt10;
-    Fixed xt2 = xt20;
-
-    yt1 += YT1_INCR;
-    yt2 += YT2_INCR;
-
-#define XT1_INCR FIXED_FROM_FLOAT(1 / 173.)
-#define XT2_INCR FIXED_FROM_FLOAT(1 / 242.)
-
-#if OPTIMIZE_WRITES
-    /* optimize memory writes by generating one aligned 32-bit store
-     * for every pair of pixels.
-     */
-    uint16_t* line_end = line + buffer->width;
-
-    if (line < line_end) {
-      if (((uint32_t)(uintptr_t)line & 3) != 0) {
-        Fixed ii = base + fixed_sin(xt1) + fixed_sin(xt2);
-
-        xt1 += XT1_INCR;
-        xt2 += XT2_INCR;
-
-        line[0] = palette_from_fixed(ii >> 2);
-        line++;
-      }
-
-      while (line + 2 <= line_end) {
-        Fixed i1 = base + fixed_sin(xt1) + fixed_sin(xt2);
-        xt1 += XT1_INCR;
-        xt2 += XT2_INCR;
-
-        Fixed i2 = base + fixed_sin(xt1) + fixed_sin(xt2);
-        xt1 += XT1_INCR;
-        xt2 += XT2_INCR;
-
-        uint32_t pixel = ((uint32_t)palette_from_fixed(i1 >> 2) << 16) |
-                         (uint32_t)palette_from_fixed(i2 >> 2);
-
-        ((uint32_t*)line)[0] = pixel;
-        line += 2;
-      }
-
-      if (line < line_end) {
-        Fixed ii = base + fixed_sin(xt1) + fixed_sin(xt2);
-        line[0] = palette_from_fixed(ii >> 2);
-        line++;
-      }
-    }
-#else  /* !OPTIMIZE_WRITES */
-    int xx;
-    for (xx = 0; xx < buffer->width; xx++) {
-      Fixed ii = base + fixed_sin(xt1) + fixed_sin(xt2);
-
-      xt1 += XT1_INCR;
-      xt2 += XT2_INCR;
-
-      line[xx] = palette_from_fixed(ii / 4);
-    }
-#endif /* !OPTIMIZE_WRITES */
-
-    // go to next line
-    pixels = (uint16_t*)pixels + buffer->stride;
-  }
-}
-
-/* simple stats management */
-typedef struct {
-  double renderTime;
-  double frameTime;
-} FrameStats;
-
-#define MAX_FRAME_STATS 200
-#define MAX_PERIOD_MS 1500
-
-typedef struct {
-  double firstTime;
-  double lastTime;
-  double frameTime;
-
-  int firstFrame;
-  int numFrames;
-  FrameStats frames[MAX_FRAME_STATS];
-} Stats;
-
-static void stats_init(Stats* s) {
-  s->lastTime = now_ms();
-  s->firstTime = 0.;
-  s->firstFrame = 0;
-  s->numFrames = 0;
-}
-
-static void stats_startFrame(Stats* s) { s->frameTime = now_ms(); }
-
-static void stats_endFrame(Stats* s) {
-  double now = now_ms();
-  double renderTime = now - s->frameTime;
-  double frameTime = now - s->lastTime;
-  int nn;
-
-  if (now - s->firstTime >= MAX_PERIOD_MS) {
-    if (s->numFrames > 0) {
-      double minRender, maxRender, avgRender;
-      double minFrame, maxFrame, avgFrame;
-      int count;
-
-      nn = s->firstFrame;
-      minRender = maxRender = avgRender = s->frames[nn].renderTime;
-      minFrame = maxFrame = avgFrame = s->frames[nn].frameTime;
-      for (count = s->numFrames; count > 0; count--) {
-        nn += 1;
-        if (nn >= MAX_FRAME_STATS) nn -= MAX_FRAME_STATS;
-        double render = s->frames[nn].renderTime;
-        if (render < minRender) minRender = render;
-        if (render > maxRender) maxRender = render;
-        double frame = s->frames[nn].frameTime;
-        if (frame < minFrame) minFrame = frame;
-        if (frame > maxFrame) maxFrame = frame;
-        avgRender += render;
-        avgFrame += frame;
-      }
-      avgRender /= s->numFrames;
-      avgFrame /= s->numFrames;
-
-      LOGI(
-          "frame/s (avg,min,max) = (%.1f,%.1f,%.1f) "
-          "render time ms (avg,min,max) = (%.1f,%.1f,%.1f)\n",
-          1000. / avgFrame, 1000. / maxFrame, 1000. / minFrame, avgRender,
-          minRender, maxRender);
-    }
-    s->numFrames = 0;
-    s->firstFrame = 0;
-    s->firstTime = now;
-  }
-
-  nn = s->firstFrame + s->numFrames;
-  if (nn >= MAX_FRAME_STATS) nn -= MAX_FRAME_STATS;
-
-  s->frames[nn].renderTime = renderTime;
-  s->frames[nn].frameTime = frameTime;
-
-  if (s->numFrames < MAX_FRAME_STATS) {
-    s->numFrames += 1;
-  } else {
-    s->firstFrame += 1;
-    if (s->firstFrame >= MAX_FRAME_STATS) s->firstFrame -= MAX_FRAME_STATS;
-  }
-
-  s->lastTime = now;
-}
-
-// ----------------------------------------------------------------------
-
-struct engine {
-  struct android_app* app;
-
-  Stats stats;
-
-  int animating;
-};
-
-static int64_t start_ms;
-static void engine_draw_frame(struct engine* engine) {
-  if (engine->app->window == NULL) {
-    // No window.
-    return;
-  }
-
-  ANativeWindow_Buffer buffer;
-  if (ANativeWindow_lock(engine->app->window, &buffer, NULL) < 0) {
-    LOGW("Unable to lock window buffer");
-    return;
-  }
-
-  stats_startFrame(&engine->stats);
-
-  struct timespec now;
-  clock_gettime(CLOCK_MONOTONIC, &now);
-  int64_t time_ms =
-      (((int64_t)now.tv_sec) * 1000000000LL + now.tv_nsec) / 1000000;
-  time_ms -= start_ms;
-
-  /* Now fill the values with a nice little plasma */
-  fill_plasma(&buffer, time_ms);
-
-  ANativeWindow_unlockAndPost(engine->app->window);
-
-  stats_endFrame(&engine->stats);
-}
-
-static void engine_term_display(struct engine* engine) {
-  engine->animating = 0;
-}
-
-static int32_t engine_handle_input(struct android_app* app,
-                                   AInputEvent* event) {
-  struct engine* engine = (struct engine*)app->userData;
-  if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION) {
-    engine->animating = 1;
-    return 1;
-  } else if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_KEY) {
-    LOGI("Key event: action=%d keyCode=%d metaState=0x%x",
-         AKeyEvent_getAction(event), AKeyEvent_getKeyCode(event),
-         AKeyEvent_getMetaState(event));
-  }
-
-  return 0;
-}
-
-static void engine_handle_cmd(struct android_app* app, int32_t cmd) {
-  static int32_t format = WINDOW_FORMAT_RGB_565;
-  struct engine* engine = (struct engine*)app->userData;
-  switch (cmd) {
-    case APP_CMD_INIT_WINDOW:
-      if (engine->app->window != NULL) {
-        // fill_plasma() assumes 565 format, get it here
-        format = ANativeWindow_getFormat(app->window);
-        ANativeWindow_setBuffersGeometry(
-            app->window, ANativeWindow_getWidth(app->window),
-            ANativeWindow_getHeight(app->window), WINDOW_FORMAT_RGB_565);
-        engine_draw_frame(engine);
-      }
-      break;
-    case APP_CMD_TERM_WINDOW:
-      engine_term_display(engine);
-      ANativeWindow_setBuffersGeometry(
-          app->window, ANativeWindow_getWidth(app->window),
-          ANativeWindow_getHeight(app->window), format);
-      break;
-    case APP_CMD_LOST_FOCUS:
-      engine->animating = 0;
-      engine_draw_frame(engine);
-      break;
-  }
-}
-
-void android_main(struct android_app* state) {
-  static int init;
-
-  struct engine engine;
-
-  memset(&engine, 0, sizeof(engine));
-  state->userData = &engine;
-  state->onAppCmd = engine_handle_cmd;
-  state->onInputEvent = engine_handle_input;
-  engine.app = state;
-
-  if (!init) {
-    init_tables();
-    init = 1;
-  }
-
-  struct timespec now;
-  clock_gettime(CLOCK_MONOTONIC, &now);
-  start_ms = (((int64_t)now.tv_sec) * 1000000000LL + now.tv_nsec) / 1000000;
-
-  stats_init(&engine.stats);
-
-  // loop waiting for stuff to do.
-
-  while (!state->destroyRequested) {
-    // If not animating, we will block forever waiting for events.
-    // If animating, we loop until all events are read, then continue
-    // to draw the next frame of animation.
-    struct android_poll_source* source = NULL;
-    int result = ALooper_pollOnce(engine.animating ? 0 : -1, NULL, NULL,
-                                  (void**)&source);
-    if (result == ALOOPER_POLL_ERROR) {
-      LOGE("ALooper_pollOnce returned an error");
-      abort();
-    }
-
-    // Process this event.
-    if (source != NULL) {
-      source->process(state, source);
-    }
-
-    if (engine.animating) {
-      engine_draw_frame(&engine);
-    }
-  }
-
-  LOGI("Engine thread destroy requested!");
-  engine_term_display(&engine);
-}

native-plasma/app/src/main/res/values/strings.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string name="app_name">Native Plasma</string>
-</resources>

nn-samples/.gitignore

@@ -1,9 +0,0 @@
-*.iml
-.gradle
-/local.properties
-/.idea
-.DS_Store
-/build
-/captures
-.externalNativeBuild
-.cxx

nn-samples/README.md

@@ -1,59 +1,7 @@
-# Android Neural Networks API Sample
+# Sample removed
 
-The samples demonstrate how to use Android NNAPI exported through Android NDK:
+This sample has been removed because the Android Neural Networks API has been
+deprecated. Apps should instead use TensorFlow Lite. For for information, see
+the [NNAPI Migration Guide].
 
-- basic: showcase the main NNAPI concept from Android 8
-- sequence: showcase the advanced features added in Android 11
-
-Check each module's README.md for additional descriptions and additional
-requirements.
-
-## Pre-requisites
-
-- Android Studio 4.0+.
-- NDK r16+.
-- Android API 27+.
-
-## Getting Started
-
-1. [Download Android Studio](http://developer.android.com/sdk/index.html)
-1. Launch Android Studio.
-1. Open the sample directory.
-1. Click *Tools/Android/Sync Project with Gradle Files*.
-1. Click *Run/Run 'app'*.
-
-## Screenshots
-
-<img src="basic/screenshot.png" width="360">
-<img src="sequence/screenshot.png" width="360">
-
-## Support
-
-If you've found an error in these samples, please
-[file an issue](https://github.com/android/ndk-samples/issues/new).
-
-Patches are encouraged, and may be submitted by
-[forking this project](https://github.com/android/ndk-samples/fork) and
-submitting a pull request through GitHub. Please see
-[CONTRIBUTING.md](../CONTRIBUTING.md) for more details.
-
-- [Stack Overflow](http://stackoverflow.com/questions/tagged/android-ndk)
-- [Android Tools Feedbacks](http://tools.android.com/feedback)
-
-## License
-
-Copyright 2020 Google LLC
-
-Licensed to the Apache Software Foundation (ASF) under one or more contributor
-license agreements. See the NOTICE file distributed with this work for
-additional information regarding copyright ownership. The ASF licenses this file
-to you under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software distributed
-under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-CONDITIONS OF ANY KIND, either express or implied. See the License for the
-specific language governing permissions and limitations under the License.
+[NNAPI Migration Guide]: https://developer.android.com/ndk/guides/neuralnetworks/migration-guide

nn-samples/basic/.gitignore

@@ -1 +0,0 @@
-/build

nn-samples/basic/README.md

@@ -1,44 +0,0 @@
-# Android Neural Networks API Sample: Basic
-
-Android Neural Networks API (NN API) Sample demonstrates basic usages of NN API
-with a simple model that consists of three operations: two additions and a
-multiplication.
-
-The sums created by the additions are the inputs to the multiplication. In
-essence, we are creating a graph that computes: (tensor0 + tensor1) * (tensor2 +
-tensor3).
-
-```java
-tensor0 ---+
-           +--- ADD ---> intermediateOutput0 ---+
-tensor1 ---+                                    |
-                                                +--- MUL---> output
-tensor2 ---+                                    |
-           +--- ADD ---> intermediateOutput1 ---+
-tensor3 ---+
-```
-
-Two of the four tensors, tensor0 and tensor2 being added are constants, defined
-in the model. They represent the weights that would have been learned during a
-training process, loaded from model_data.bin.
-
-The other two tensors, tensor1 and tensor3 will be inputs to the model. Their
-values will be provided when we execute the model. These values can change from
-execution to execution.
-
-Besides the two input tensors, an optional fused activation function can also be
-defined for ADD and MUL. In this example, we'll simply set it to NONE.
-
-The model then has 8 operands:
-
-- 2 tensors that are inputs to the model. These are fed to the two ADD
-  operations.
-- 2 constant tensors that are the other two inputs to the ADD operations.
-- 1 fuse activation operand reused for the ADD operations and the MUL operation.
-- 2 intermediate tensors, representing outputs of the ADD operations and inputs
-  to the MUL operation.
-- 1 model output.
-
-## Screenshots
-
-<img src="screenshot.png" width="480">

nn-samples/basic/build.gradle

@@ -1,35 +0,0 @@
-plugins {
-    id "ndksamples.android.application"
-    id 'ndksamples.android.kotlin'
-}
-
-android {
-    namespace 'com.example.android.basic'
-
-    defaultConfig {
-        applicationId "com.example.android.basic"
-        minSdkVersion 27
-        versionCode 1
-        versionName "1.0"
-    }
-
-    externalNativeBuild {
-        cmake {
-            path "src/main/cpp/CMakeLists.txt"
-        }
-    }
-
-    buildFeatures {
-        viewBinding true
-    }
-
-    androidResources {
-        noCompress 'bin'
-    }
-}
-
-dependencies {
-    implementation libs.androidx.constraintlayout
-    implementation libs.kotlinx.coroutines.core
-    implementation libs.kotlinx.coroutines.android
-}

nn-samples/basic/proguard-rules.pro

@@ -1,21 +0,0 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile

nn-samples/basic/src/main/AndroidManifest.xml

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <application
-        android:allowBackup="true"
-        android:icon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
-        android:supportsRtl="true"
-        android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-    </application>
-</manifest>

nn-samples/basic/src/main/cpp/CMakeLists.txt

@@ -1,15 +0,0 @@
-cmake_minimum_required(VERSION 3.22.1)
-project(NnSamplesBasic LANGUAGES CXX)
-
-add_library(basic
-    SHARED
-    nn_sample.cpp
-    simple_model.cpp
-)
-
-target_link_libraries(basic
-    # Link with libneuralnetworks.so for NN API
-    neuralnetworks
-    android
-    log
-)

nn-samples/basic/src/main/cpp/nn_sample.cpp

@@ -1,75 +0,0 @@
-/**
- * Copyright 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <android/asset_manager_jni.h>
-#include <android/log.h>
-#include <android/sharedmem.h>
-#include <fcntl.h>
-#include <jni.h>
-#include <sys/mman.h>
-
-#include <iomanip>
-#include <sstream>
-#include <string>
-
-#include "simple_model.h"
-
-extern "C" JNIEXPORT jlong JNICALL
-Java_com_example_android_basic_MainActivity_initModel(JNIEnv* env,
-                                                      jobject /* this */,
-                                                      jobject _assetManager,
-                                                      jstring _assetName) {
-  // Get the file descriptor of the model data file.
-  AAssetManager* assetManager = AAssetManager_fromJava(env, _assetManager);
-  const char* assetName = env->GetStringUTFChars(_assetName, NULL);
-  AAsset* asset =
-      AAssetManager_open(assetManager, assetName, AASSET_MODE_BUFFER);
-  if (asset == nullptr) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "Failed to open the asset.");
-    return 0;
-  }
-  env->ReleaseStringUTFChars(_assetName, assetName);
-  SimpleModel* nn_model = new SimpleModel(asset);
-  AAsset_close(asset);
-  if (!nn_model->CreateCompiledModel()) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "Failed to prepare the model.");
-    return 0;
-  }
-
-  return (jlong)(uintptr_t)nn_model;
-}
-
-extern "C" JNIEXPORT jfloat JNICALL
-Java_com_example_android_basic_MainActivity_startCompute(JNIEnv* env,
-                                                         jobject /* this */,
-                                                         jlong _nnModel,
-                                                         jfloat inputValue1,
-                                                         jfloat inputValue2) {
-  SimpleModel* nn_model = (SimpleModel*)_nnModel;
-  float result = 0.0f;
-  nn_model->Compute(inputValue1, inputValue2, &result);
-  return result;
-}
-
-extern "C" JNIEXPORT void JNICALL
-Java_com_example_android_basic_MainActivity_destroyModel(JNIEnv* env,
-                                                         jobject /* this */,
-                                                         jlong _nnModel) {
-  SimpleModel* nn_model = (SimpleModel*)_nnModel;
-  delete (nn_model);
-}

nn-samples/basic/src/main/cpp/simple_model.cpp

@@ -1,556 +0,0 @@
-/**
- * Copyright 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include "simple_model.h"
-
-#include <android/asset_manager_jni.h>
-#include <android/log.h>
-#include <android/sharedmem.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <string>
-
-namespace {
-
-// Create ANeuralNetworksMemory from an asset file.
-//
-// Note that, at API level 30 or earlier, the NNAPI drivers may not have the
-// permission to access the asset file. To work around this issue, here we will:
-// 1. Allocate a large-enough shared memory to hold the model data;
-// 2. Copy the asset file to the shared memory;
-// 3. Create the NNAPI memory with the file descriptor of the shared memory.
-ANeuralNetworksMemory* createMemoryFromAsset(AAsset* asset) {
-  // Allocate a large-enough shared memory to hold the model data.
-  off_t length = AAsset_getLength(asset);
-  int fd = ASharedMemory_create("model_data", length);
-  if (fd < 0) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ASharedMemory_create failed with size %d", length);
-    return nullptr;
-  }
-
-  // Copy the asset file to the shared memory.
-  void* data = mmap(nullptr, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-  if (data == nullptr) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "Failed to map a shared memory");
-    close(fd);
-    return nullptr;
-  }
-  AAsset_read(asset, data, length);
-  munmap(data, length);
-
-  // Create the NNAPI memory with the file descriptor of the shared memory.
-  ANeuralNetworksMemory* memory;
-  int status = ANeuralNetworksMemory_createFromFd(
-      length, PROT_READ | PROT_WRITE, fd, 0, &memory);
-
-  // It is safe to close the file descriptor here because
-  // ANeuralNetworksMemory_createFromFd will create a dup.
-  close(fd);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksMemory_createFromFd failed for trained weights");
-    return nullptr;
-  }
-  return memory;
-}
-
-}  // namespace
-
-/**
- * SimpleModel Constructor.
- *
- * Initialize the member variables, including the shared memory objects.
- */
-SimpleModel::SimpleModel(AAsset* asset)
-    : model_(nullptr), compilation_(nullptr), dimLength_(TENSOR_SIZE) {
-  tensorSize_ = dimLength_;
-  inputTensor1_.resize(tensorSize_);
-
-  // Create ANeuralNetworksMemory from a file containing the trained data.
-  memoryModel_ = createMemoryFromAsset(asset);
-
-  // Create ASharedMemory to hold the data for the second input tensor and
-  // output output tensor.
-  inputTensor2Fd_ = ASharedMemory_create("input2", tensorSize_ * sizeof(float));
-  outputTensorFd_ = ASharedMemory_create("output", tensorSize_ * sizeof(float));
-
-  // Create ANeuralNetworksMemory objects from the corresponding ASharedMemory
-  // objects.
-  int status =
-      ANeuralNetworksMemory_createFromFd(tensorSize_ * sizeof(float), PROT_READ,
-                                         inputTensor2Fd_, 0, &memoryInput2_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemory_createFromFd failed for Input2");
-    return;
-  }
-  status = ANeuralNetworksMemory_createFromFd(
-      tensorSize_ * sizeof(float), PROT_READ | PROT_WRITE, outputTensorFd_, 0,
-      &memoryOutput_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemory_createFromFd failed for Output");
-    return;
-  }
-}
-
-/**
- * Create a graph that consists of three operations: two additions and a
- * multiplication.
- * The sums created by the additions are the inputs to the multiplication. In
- * essence, we are creating a graph that computes:
- *        (tensor0 + tensor1) * (tensor2 + tensor3).
- *
- * tensor0 ---+
- *            +--- ADD ---> intermediateOutput0 ---+
- * tensor1 ---+                                    |
- *                                                 +--- MUL---> output
- * tensor2 ---+                                    |
- *            +--- ADD ---> intermediateOutput1 ---+
- * tensor3 ---+
- *
- * Two of the four tensors, tensor0 and tensor2 being added are constants,
- * defined in the model. They represent the weights that would have been learned
- * during a training process.
- *
- * The other two tensors, tensor1 and tensor3 will be inputs to the model. Their
- * values will be provided when we execute the model. These values can change
- * from execution to execution.
- *
- * Besides the two input tensors, an optional fused activation function can
- * also be defined for ADD and MUL. In this example, we'll simply set it to
- * NONE.
- *
- * The graph then has 10 operands:
- *  - 2 tensors that are inputs to the model. These are fed to the two
- *      ADD operations.
- *  - 2 constant tensors that are the other two inputs to the ADD operations.
- *  - 1 fuse activation operand reused for the ADD operations and the MUL
- * operation.
- *  - 2 intermediate tensors, representing outputs of the ADD operations and
- * inputs to the MUL operation.
- *  - 1 model output.
- *
- * @return true for success, false otherwise
- */
-bool SimpleModel::CreateCompiledModel() {
-  int32_t status;
-
-  // Create the ANeuralNetworksModel handle.
-  status = ANeuralNetworksModel_create(&model_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_create failed");
-    return false;
-  }
-
-  uint32_t dimensions[] = {dimLength_};
-  ANeuralNetworksOperandType float32TensorType{
-      .type = ANEURALNETWORKS_TENSOR_FLOAT32,
-      .dimensionCount = sizeof(dimensions) / sizeof(dimensions[0]),
-      .dimensions = dimensions,
-      .scale = 0.0f,
-      .zeroPoint = 0,
-  };
-  ANeuralNetworksOperandType scalarInt32Type{
-      .type = ANEURALNETWORKS_INT32,
-      .dimensionCount = 0,
-      .dimensions = nullptr,
-      .scale = 0.0f,
-      .zeroPoint = 0,
-  };
-
-  /**
-   * Add operands and operations to construct the model.
-   *
-   * Operands are implicitly identified by the order in which they are added to
-   * the model, starting from 0.
-   *
-   * These indexes are not returned by the model_addOperand call. The
-   * application must manage these values. Here, we use opIdx to do the
-   * bookkeeping.
-   */
-  uint32_t opIdx = 0;
-
-  // We first add the operand for the NONE activation function, and set its
-  // value to ANEURALNETWORKS_FUSED_NONE.
-  // This constant scalar operand will be used for all 3 operations.
-  status = ANeuralNetworksModel_addOperand(model_, &scalarInt32Type);
-  uint32_t fusedActivationFuncNone = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)",
-        fusedActivationFuncNone);
-    return false;
-  }
-
-  FuseCode fusedActivationCodeValue = ANEURALNETWORKS_FUSED_NONE;
-  status = ANeuralNetworksModel_setOperandValue(
-      model_, fusedActivationFuncNone, &fusedActivationCodeValue,
-      sizeof(fusedActivationCodeValue));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_setOperandValue failed for operand (%d)",
-        fusedActivationFuncNone);
-    return false;
-  }
-
-  // Add operands for the tensors.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t tensor0 = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", tensor0);
-    return false;
-  }
-  // tensor0 is a constant tensor that was established during training.
-  // We read these values from the corresponding ANeuralNetworksMemory object.
-  status = ANeuralNetworksModel_setOperandValueFromMemory(
-      model_, tensor0, memoryModel_, 0, tensorSize_ * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_setOperandValueFromMemory failed "
-                        "for operand (%d)",
-                        tensor0);
-    return false;
-  }
-
-  // tensor1 is one of the user provided input tensors to the trained model.
-  // Its value is determined pre-execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t tensor1 = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", tensor1);
-    return false;
-  }
-
-  // tensor2 is a constant tensor that was established during training.
-  // We read these values from the corresponding ANeuralNetworksMemory object.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t tensor2 = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", tensor2);
-    return false;
-  }
-  status = ANeuralNetworksModel_setOperandValueFromMemory(
-      model_, tensor2, memoryModel_, tensorSize_ * sizeof(float),
-      tensorSize_ * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_setOperandValueFromMemory failed "
-                        "for operand (%d)",
-                        tensor2);
-    return false;
-  }
-
-  // tensor3 is one of the user provided input tensors to the trained model.
-  // Its value is determined pre-execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t tensor3 = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", tensor3);
-    return false;
-  }
-
-  // intermediateOutput0 is the output of the first ADD operation.
-  // Its value is computed during execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t intermediateOutput0 = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)",
-        intermediateOutput0);
-    return false;
-  }
-
-  // intermediateOutput1 is the output of the second ADD operation.
-  // Its value is computed during execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t intermediateOutput1 = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)",
-        intermediateOutput1);
-    return false;
-  }
-
-  // multiplierOutput is the output of the MUL operation.
-  // Its value will be computed during execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t multiplierOutput = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)",
-        multiplierOutput);
-    return false;
-  }
-
-  // Add the first ADD operation.
-  std::vector<uint32_t> add1InputOperands = {
-      tensor0,
-      tensor1,
-      fusedActivationFuncNone,
-  };
-  status = ANeuralNetworksModel_addOperation(
-      model_, ANEURALNETWORKS_ADD, add1InputOperands.size(),
-      add1InputOperands.data(), 1, &intermediateOutput0);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_addOperation failed for ADD_1");
-    return false;
-  }
-
-  // Add the second ADD operation.
-  // Note the fusedActivationFuncNone is used again.
-  std::vector<uint32_t> add2InputOperands = {
-      tensor2,
-      tensor3,
-      fusedActivationFuncNone,
-  };
-  status = ANeuralNetworksModel_addOperation(
-      model_, ANEURALNETWORKS_ADD, add2InputOperands.size(),
-      add2InputOperands.data(), 1, &intermediateOutput1);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_addOperation failed for ADD_2");
-    return false;
-  }
-
-  // Add the MUL operation.
-  // Note that intermediateOutput0 and intermediateOutput1 are specified
-  // as inputs to the operation.
-  std::vector<uint32_t> mulInputOperands = {
-      intermediateOutput0, intermediateOutput1, fusedActivationFuncNone};
-  status = ANeuralNetworksModel_addOperation(
-      model_, ANEURALNETWORKS_MUL, mulInputOperands.size(),
-      mulInputOperands.data(), 1, &multiplierOutput);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_addOperation failed for MUL");
-    return false;
-  }
-
-  // Identify the input and output tensors to the model.
-  // Inputs: {tensor1, tensor3}
-  // Outputs: {multiplierOutput}
-  std::vector<uint32_t> modelInputOperands = {
-      tensor1,
-      tensor3,
-  };
-  status = ANeuralNetworksModel_identifyInputsAndOutputs(
-      model_, modelInputOperands.size(), modelInputOperands.data(), 1,
-      &multiplierOutput);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_identifyInputsAndOutputs failed");
-    return false;
-  }
-
-  // Finish constructing the model.
-  // The values of constant and intermediate operands cannot be altered after
-  // the finish function is called.
-  status = ANeuralNetworksModel_finish(model_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_finish failed");
-    return false;
-  }
-
-  // Create the ANeuralNetworksCompilation object for the constructed model.
-  status = ANeuralNetworksCompilation_create(model_, &compilation_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksCompilation_create failed");
-    return false;
-  }
-
-  // Set the preference for the compilation, so that the runtime and drivers
-  // can make better decisions.
-  // Here we prefer to get the answer quickly, so we choose
-  // ANEURALNETWORKS_PREFER_FAST_SINGLE_ANSWER.
-  status = ANeuralNetworksCompilation_setPreference(
-      compilation_, ANEURALNETWORKS_PREFER_FAST_SINGLE_ANSWER);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksCompilation_setPreference failed");
-    return false;
-  }
-
-  // Finish the compilation.
-  status = ANeuralNetworksCompilation_finish(compilation_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksCompilation_finish failed");
-    return false;
-  }
-
-  return true;
-}
-
-/**
- * Compute with the given input data.
- * @param modelInputs:
- *    inputValue1:   The values to fill tensor1
- *    inputValue2:   The values to fill tensor3
- * @return  computed result, or 0.0f if there is error.
- */
-bool SimpleModel::Compute(float inputValue1, float inputValue2, float* result) {
-  if (!result) {
-    return false;
-  }
-
-  // Create an ANeuralNetworksExecution object from the compiled model.
-  // Note:
-  //   1. All the input and output data are tied to the ANeuralNetworksExecution
-  //   object.
-  //   2. Multiple concurrent execution instances could be created from the same
-  //   compiled model.
-  // This sample only uses one execution of the compiled model.
-  ANeuralNetworksExecution* execution;
-  int32_t status = ANeuralNetworksExecution_create(compilation_, &execution);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksExecution_create failed");
-    return false;
-  }
-
-  // Set all the elements of the first input tensor (tensor1) to the same value
-  // as inputValue1. It's not a realistic example but it shows how to pass a
-  // small tensor to an execution.
-  std::fill(inputTensor1_.data(), inputTensor1_.data() + tensorSize_,
-            inputValue1);
-
-  // Tell the execution to associate inputTensor1 to the first of the two model
-  // inputs. Note that the index "0" here means the first operand of the
-  // modelInput list {tensor1, tensor3}, which means tensor1.
-  status = ANeuralNetworksExecution_setInput(
-      execution, 0, nullptr, inputTensor1_.data(), tensorSize_ * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksExecution_setInput failed for input1");
-    return false;
-  }
-
-  // Set the values of the second input operand (tensor3) to be inputValue2.
-  // In reality, the values in the shared memory region will be manipulated by
-  // other modules or processes.
-  float* inputTensor2Ptr = reinterpret_cast<float*>(
-      mmap(nullptr, tensorSize_ * sizeof(float), PROT_READ | PROT_WRITE,
-           MAP_SHARED, inputTensor2Fd_, 0));
-  for (int i = 0; i < tensorSize_; i++) {
-    *inputTensor2Ptr = inputValue2;
-    inputTensor2Ptr++;
-  }
-  munmap(inputTensor2Ptr, tensorSize_ * sizeof(float));
-
-  // ANeuralNetworksExecution_setInputFromMemory associates the operand with a
-  // shared memory region to minimize the number of copies of raw data. Note
-  // that the index "1" here means the second operand of the modelInput list
-  // {tensor1, tensor3}, which means tensor3.
-  status = ANeuralNetworksExecution_setInputFromMemory(
-      execution, 1, nullptr, memoryInput2_, 0, tensorSize_ * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksExecution_setInputFromMemory failed for input2");
-    return false;
-  }
-
-  // Set the output tensor that will be filled by executing the model.
-  // We use shared memory here to minimize the copies needed for getting the
-  // output data.
-  status = ANeuralNetworksExecution_setOutputFromMemory(
-      execution, 0, nullptr, memoryOutput_, 0, tensorSize_ * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksExecution_setOutputFromMemory failed for output");
-    return false;
-  }
-
-  // Start the execution of the model.
-  // Note that the execution here is asynchronous, and an ANeuralNetworksEvent
-  // object will be created to monitor the status of the execution.
-  ANeuralNetworksEvent* event = nullptr;
-  status = ANeuralNetworksExecution_startCompute(execution, &event);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksExecution_startCompute failed");
-    return false;
-  }
-
-  // Wait until the completion of the execution. This could be done on a
-  // different thread. By waiting immediately, we effectively make this a
-  // synchronous call.
-  status = ANeuralNetworksEvent_wait(event);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksEvent_wait failed");
-    return false;
-  }
-
-  ANeuralNetworksEvent_free(event);
-  ANeuralNetworksExecution_free(execution);
-
-  // Validate the results.
-  const float goldenRef = (inputValue1 + 0.5f) * (inputValue2 + 0.5f);
-  float* outputTensorPtr =
-      reinterpret_cast<float*>(mmap(nullptr, tensorSize_ * sizeof(float),
-                                    PROT_READ, MAP_SHARED, outputTensorFd_, 0));
-  for (int32_t idx = 0; idx < tensorSize_; idx++) {
-    float delta = outputTensorPtr[idx] - goldenRef;
-    delta = (delta < 0.0f) ? (-delta) : delta;
-    if (delta > FLOAT_EPISILON) {
-      __android_log_print(
-          ANDROID_LOG_ERROR, LOG_TAG,
-          "Output computation Error: output0(%f), delta(%f) @ idx(%d)",
-          outputTensorPtr[0], delta, idx);
-    }
-  }
-  *result = outputTensorPtr[0];
-  munmap(outputTensorPtr, tensorSize_ * sizeof(float));
-  return result;
-}
-
-/**
- * SimpleModel Destructor.
- *
- * Release NN API objects and close the file descriptors.
- */
-SimpleModel::~SimpleModel() {
-  ANeuralNetworksCompilation_free(compilation_);
-  ANeuralNetworksModel_free(model_);
-  ANeuralNetworksMemory_free(memoryModel_);
-  ANeuralNetworksMemory_free(memoryInput2_);
-  ANeuralNetworksMemory_free(memoryOutput_);
-  close(inputTensor2Fd_);
-  close(outputTensorFd_);
-}

nn-samples/basic/src/main/cpp/simple_model.h

@@ -1,64 +0,0 @@
-/**
- * Copyright 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef NNAPI_SIMPLE_MODEL_H
-#define NNAPI_SIMPLE_MODEL_H
-
-#include <android/NeuralNetworks.h>
-#include <android/asset_manager_jni.h>
-
-#include <vector>
-
-#define FLOAT_EPISILON (1e-6)
-#define TENSOR_SIZE 200
-#define LOG_TAG "NNAPI_BASIC"
-
-/**
- * SimpleModel
- * Build up the hardcoded graph of
- *   ADD_1 ---+
- *            +--- MUL--->output result
- *   ADD_2 ---+
- *
- *   Operands are all 2-D TENSOR_FLOAT32 of:
- *       dimLength x dimLength
- *   with NO fused_activation operation
- *
- */
-class SimpleModel {
- public:
-  explicit SimpleModel(AAsset* asset);
-  ~SimpleModel();
-
-  bool CreateCompiledModel();
-  bool Compute(float inputValue1, float inputValue2, float* result);
-
- private:
-  ANeuralNetworksModel* model_;
-  ANeuralNetworksCompilation* compilation_;
-  ANeuralNetworksMemory* memoryModel_;
-  ANeuralNetworksMemory* memoryInput2_;
-  ANeuralNetworksMemory* memoryOutput_;
-
-  uint32_t dimLength_;
-  uint32_t tensorSize_;
-
-  std::vector<float> inputTensor1_;
-  int inputTensor2Fd_;
-  int outputTensorFd_;
-};
-
-#endif  // NNAPI_SIMPLE_MODEL_H

nn-samples/basic/src/main/java/com/example/android/basic/MainActivity.kt

@@ -1,85 +0,0 @@
-/**
- * Copyright 2017 The Android Open Source Project
- *
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.example.android.basic
-
-import android.app.Activity
-import android.content.res.AssetManager
-import android.os.Bundle
-import android.widget.Toast
-import com.example.android.basic.databinding.ActivityMainBinding
-import kotlinx.coroutines.*
-
-/*
-  MainActivity to take care of UI and user inputs
- */
-class MainActivity : Activity() {
-    private var modelHandle = 0L
-
-    /*
-       3 JNI functions managing NN models, refer to basic/README.md
-       for model structure
-     */
-    private external fun initModel(assetManager: AssetManager?, assetName: String?): Long
-    private external fun startCompute(modelHandle: Long, input1: Float, input2: Float): Float
-    private external fun destroyModel(modelHandle: Long)
-
-    private lateinit var binding: ActivityMainBinding
-    private val activityJob = Job()
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        binding = ActivityMainBinding.inflate(layoutInflater)
-        setContentView(binding.root)
-        CoroutineScope(Dispatchers.IO + activityJob).async(Dispatchers.IO) {
-            modelHandle = this@MainActivity.initModel(assets, "model_data.bin")
-        }
-
-        binding.computButton.setOnClickListener {
-            if (modelHandle == 0L) {
-                Toast.makeText(applicationContext, "Model initializing, please wait",
-                        Toast.LENGTH_SHORT).show()
-            }
-
-            if (binding.tensorSeed0.text.isNotEmpty() && binding.tensorSeed2.text.isNotEmpty()) {
-                Toast.makeText(applicationContext, "Computing", Toast.LENGTH_SHORT).show()
-                binding.computeResult.text = runBlocking {
-                    val operand0 = binding.tensorSeed0.text.toString().toFloat()
-                    val operand2 = binding.tensorSeed2.text.toString().toFloat()
-                    startCompute(modelHandle, operand0, operand2).toString()
-                }.toString()
-            }
-        }
-    }
-
-    override fun onDestroy() {
-        activityJob.cancel()
-        if (modelHandle != 0L) {
-            destroyModel(modelHandle)
-            modelHandle = 0
-        }
-        super.onDestroy()
-    }
-
-    companion object {
-        init {
-            System.loadLibrary("basic")
-        }
-    }
-}
-

nn-samples/basic/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -1,34 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:aapt="http://schemas.android.com/aapt"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportHeight="108"
-    android:viewportWidth="108">
-    <path
-        android:fillType="evenOdd"
-        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1">
-        <aapt:attr name="android:fillColor">
-            <gradient
-                android:endX="78.5885"
-                android:endY="90.9159"
-                android:startX="48.7653"
-                android:startY="61.0927"
-                android:type="linear">
-                <item
-                    android:color="#44000000"
-                    android:offset="0.0" />
-                <item
-                    android:color="#00000000"
-                    android:offset="1.0" />
-            </gradient>
-        </aapt:attr>
-    </path>
-    <path
-        android:fillColor="#FFFFFF"
-        android:fillType="nonZero"
-        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1" />
-</vector>

nn-samples/basic/src/main/res/drawable/ic_launcher_background.xml

@@ -1,170 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportHeight="108"
-    android:viewportWidth="108">
-    <path
-        android:fillColor="#26A69A"
-        android:pathData="M0,0h108v108h-108z" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-</vector>

nn-samples/basic/src/main/res/layout/activity_main.xml

@@ -1,115 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context="com.example.android.basic.MainActivity">
-
-    <Button
-        android:id="@+id/computButton"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginBottom="52dp"
-        android:layout_marginTop="8dp"
-        android:text="@string/compute"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/computeResult"
-        tools:text="@string/compute" />
-
-    <EditText
-        android:id="@+id/tensorSeed0"
-        android:layout_width="161dp"
-        android:layout_height="wrap_content"
-        android:layout_marginEnd="96dp"
-        android:layout_marginTop="24dp"
-        android:ems="10"
-        android:inputType="numberDecimal"
-        android:textAlignment="center"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <EditText
-        android:id="@+id/tensorSeed2"
-        android:layout_width="161dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="20dp"
-        android:ems="10"
-        android:inputType="numberDecimal"
-        android:textAlignment="center"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/tensorSeed0"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="@+id/tensorSeed0"
-        app:layout_constraintTop_toBottomOf="@+id/tensorSeed0" />
-
-    <TextView
-        android:id="@+id/computeResult"
-        android:layout_width="161dp"
-        android:layout_height="32dp"
-        android:layout_marginEnd="8dp"
-        android:layout_marginTop="104dp"
-        android:text="@string/none"
-        android:textAlignment="center"
-        android:textAllCaps="false"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/tensorSeed2"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="@+id/tensorSeed2"
-        app:layout_constraintTop_toBottomOf="@+id/tensorSeed2"
-        tools:text="@string/none" />
-
-    <TextView
-        android:id="@+id/resultLabel"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="104dp"
-        android:text="@string/result"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/tensorLabel2"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="@+id/tensorLabel2"
-        app:layout_constraintTop_toBottomOf="@+id/tensorLabel2"
-        tools:text="@string/result" />
-
-    <TextView
-        android:id="@+id/tensorLabel0"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="16dp"
-        android:layout_marginTop="32dp"
-        android:layout_marginEnd="8dp"
-        android:text="@string/label0"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        android:visibility="visible"
-        app:layout_constraintEnd_toStartOf="@+id/tensorSeed0"
-        app:layout_constraintHorizontal_bias="0.446"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        tools:text="@string/label0" />
-
-    <TextView
-        android:id="@+id/tensorLabel2"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="36dp"
-        android:text="@string/label2"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        android:visibility="visible"
-        app:layout_constraintEnd_toEndOf="@+id/tensorLabel0"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="@+id/tensorLabel0"
-        app:layout_constraintTop_toBottomOf="@+id/tensorLabel0"
-        tools:text="@string/label2" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>

nn-samples/basic/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

nn-samples/basic/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

nn-samples/basic/src/main/res/values/colors.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="colorPrimary">#3F51B5</color>
-    <color name="colorPrimaryDark">#303F9F</color>
-    <color name="colorAccent">#FF4081</color>
-</resources>

nn-samples/basic/src/main/res/values/strings.xml

@@ -1,8 +0,0 @@
-<resources>
-    <string name="app_name">NN API Demo: basic</string>
-    <string name="compute">Compute</string>
-    <string name="result">Result: </string>
-    <string name="label0">Augend0: </string>
-    <string name="label2">Augend2: </string>
-    <string name="none">None</string>
-</resources>

nn-samples/basic/src/main/res/values/styles.xml

@@ -1,8 +0,0 @@
-<resources>
-
-    <!-- Base application theme. -->
-    <style name="AppTheme" parent="android:Theme.Material.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
-    </style>
-
-</resources>

nn-samples/sequence/.gitignore

@@ -1 +0,0 @@
-/build

nn-samples/sequence/README.md

@@ -1,42 +0,0 @@
-# Android Neural Networks API Sample: Sequence
-
-Android Neural Networks API (NN API) Sample demonstrates basic usages of NN API
-with a sequence model that consists of two operations: one addition and one
-multiplication. This graph is used for computing a single step of accumulating a
-geometric progression.
-
-```
-  sumIn ---+
-           +--- ADD ---> sumOut
-stateIn ---+
-           +--- MUL ---> stateOut
-  ratio ---+
-```
-
-The ratio is a constant tensor, defined in the model. It represents the weights
-that would have been learned during a training process. The sumIn and stateIn
-are input tensors. Their values will be provided when we execute the model.
-These values can change from execution to execution. To compute the sum of a
-geometric progression, the graph will be executed multiple times with inputs and
-outputs chained together.
-
-```
-                +----------+   +----------+         +----------+
-  initialSum -->| Simple   |-->| Simple   |-->   -->| Simple   |--> sumOut
-                | Sequence |   | Sequence |   ...   | Sequence |
-initialState -->| Model    |-->| Model    |-->   -->| Model    |--> stateOut
-                +----------+   +----------+         +----------+
-```
-
-## Additional Requirements
-
-- Android 11 SDK to compile
-- A device running Android 11
-
-Note: This sample uses its own wrapper to access new NNAPI features in Android
-11 due to an known issue. This will be updated after the issue is fixed with the
-next R SDK release.
-
-## Screenshots
-
-<img src="screenshot.png" width="480">

nn-samples/sequence/build.gradle

@@ -1,28 +0,0 @@
-plugins {
-    id "ndksamples.android.application"
-}
-
-android {
-    namespace 'com.example.android.sequence'
-
-    defaultConfig {
-        applicationId "com.example.android.sequence"
-        minSdkVersion 30
-        versionCode 1
-        versionName "1.0"
-    }
-
-    externalNativeBuild {
-        cmake {
-            path "src/main/cpp/CMakeLists.txt"
-        }
-    }
-
-    androidResources {
-        noCompress 'bin'
-    }
-}
-
-dependencies {
-    implementation libs.androidx.constraintlayout
-}

nn-samples/sequence/proguard-rules.pro

@@ -1,21 +0,0 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile

nn-samples/sequence/src/main/AndroidManifest.xml

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <application
-        android:allowBackup="true"
-        android:icon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
-        android:supportsRtl="true"
-        android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-    </application>
-</manifest>

nn-samples/sequence/src/main/cpp/CMakeLists.txt

@@ -1,15 +0,0 @@
-cmake_minimum_required(VERSION 3.22.1)
-project(NnSamplesSequence LANGUAGES CXX)
-
-add_library(sequence
-    SHARED
-    sequence.cpp
-    sequence_model.cpp
-)
-
-target_link_libraries(sequence
-    # Link with libneuralnetworks.so for NN API
-    neuralnetworks
-    android
-    log
-)

nn-samples/sequence/src/main/cpp/sequence.cpp

@@ -1,62 +0,0 @@
-/**
- * Copyright 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <android/asset_manager_jni.h>
-#include <android/log.h>
-#include <android/sharedmem.h>
-#include <fcntl.h>
-#include <jni.h>
-#include <sys/mman.h>
-
-#include <iomanip>
-#include <sstream>
-#include <string>
-
-#include "sequence_model.h"
-
-extern "C" JNIEXPORT jlong JNICALL
-Java_com_example_android_sequence_MainActivity_initModel(JNIEnv* env,
-                                                         jobject /* this */,
-                                                         jfloat ratio) {
-  auto model = SimpleSequenceModel::Create(ratio);
-  if (model == nullptr) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "Failed to create the model.");
-    return 0;
-  }
-
-  return (jlong)(uintptr_t)model.release();
-}
-
-extern "C" JNIEXPORT jfloat JNICALL
-Java_com_example_android_sequence_MainActivity_compute(JNIEnv* env,
-                                                       jobject /* this */,
-                                                       jfloat initialValue,
-                                                       jint steps,
-                                                       jlong _nnModel) {
-  SimpleSequenceModel* nn_model = (SimpleSequenceModel*)_nnModel;
-  float result = 0.0f;
-  nn_model->Compute(initialValue, static_cast<uint32_t>(steps), &result);
-  return result;
-}
-
-extern "C" JNIEXPORT void JNICALL
-Java_com_example_android_sequence_MainActivity_destroyModel(JNIEnv* env,
-                                                            jobject /* this */,
-                                                            jlong _nnModel) {
-  SimpleSequenceModel* nn_model = (SimpleSequenceModel*)_nnModel;
-  delete (nn_model);
-}

nn-samples/sequence/src/main/cpp/sequence_model.cpp

@@ -1,724 +0,0 @@
-/**
- * Copyright 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include "sequence_model.h"
-
-#include <android/log.h>
-#include <android/sharedmem.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <string>
-#include <utility>
-#include <vector>
-
-/**
- * A helper method to allocate an ASharedMemory region and create an
- * ANeuralNetworksMemory object.
- */
-static std::pair<int, ANeuralNetworksMemory*> CreateASharedMemory(
-    const char* name, uint32_t size, int prot) {
-  int fd = ASharedMemory_create(name, size * sizeof(float));
-
-  // Create an ANeuralNetworksMemory object from the corresponding ASharedMemory
-  // objects.
-  ANeuralNetworksMemory* memory = nullptr;
-  int32_t status = ANeuralNetworksMemory_createFromFd(size * sizeof(float),
-                                                      prot, fd, 0, &memory);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemory_createFromFd failed for %s",
-                        name);
-    close(fd);
-    return {-1, nullptr};
-  }
-
-  return {fd, memory};
-}
-
-/**
- * A helper method to fill the ASharedMemory region with the given value.
- */
-static void fillMemory(int fd, uint32_t size, float value) {
-  // Set the values of the memory.
-  // In reality, the values in the shared memory region will be manipulated by
-  // other modules or processes.
-  float* data =
-      reinterpret_cast<float*>(mmap(nullptr, size * sizeof(float),
-                                    PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0));
-  std::fill(data, data + size, value);
-  munmap(data, size * sizeof(float));
-}
-
-/**
- * Factory method of SimpleSequenceModel.
- *
- * Create and initialize the model, compilation, and memories associated
- * with the computation graph.
- *
- * @return A pointer to the created model on success, nullptr otherwise
- */
-std::unique_ptr<SimpleSequenceModel> SimpleSequenceModel::Create(float ratio) {
-  auto model = std::make_unique<SimpleSequenceModel>(ratio);
-  if (model->CreateSharedMemories() && model->CreateModel() &&
-      model->CreateCompilation() && model->CreateOpaqueMemories()) {
-    return model;
-  }
-  return nullptr;
-}
-
-/**
- * SimpleSequenceModel Constructor.
- */
-SimpleSequenceModel::SimpleSequenceModel(float ratio) : ratio_(ratio) {}
-
-/**
- * Initialize the shared memory objects. In reality, the values in the shared
- * memory region will be manipulated by other modules or processes.
- *
- * @return true for success, false otherwise
- */
-bool SimpleSequenceModel::CreateSharedMemories() {
-  // Create ASharedMemory to hold the data for initial state, ratio, and sums.
-  std::tie(initialStateFd_, memoryInitialState_) =
-      CreateASharedMemory("initialState", tensorSize_, PROT_READ);
-  std::tie(ratioFd_, memoryRatio_) =
-      CreateASharedMemory("ratio", tensorSize_, PROT_READ);
-  std::tie(sumInFd_, memorySumIn_) =
-      CreateASharedMemory("sumIn", tensorSize_, PROT_READ | PROT_WRITE);
-  std::tie(sumOutFd_, memorySumOut_) =
-      CreateASharedMemory("sumOut", tensorSize_, PROT_READ | PROT_WRITE);
-
-  // Initialize the ratio tensor.
-  fillMemory(ratioFd_, tensorSize_, ratio_);
-  return true;
-}
-
-/**
- * Create a graph that consists of two operations: one addition and one
- * multiplication. This graph is used for computing a single step of
- * accumulating a geometric progression.
- *
- *   sumIn ---+
- *            +--- ADD ---> sumOut
- * stateIn ---+
- *            +--- MUL ---> stateOut
- *   ratio ---+
- *
- * The ratio is a constant tensor, defined in the model. It represents the
- * weights that would have been learned during a training process.
- *
- * The sumIn and stateIn are input tensors. Their values will be provided when
- * we execute the model. These values can change from execution to execution.
- *
- * To compute the sum of a geometric progression, the graph will be executed
- * multiple times with inputs and outputs chained together.
- *
- *                 +----------+   +----------+         +----------+
- *   initialSum -->| Simple   |-->| Simple   |-->   -->| Simple   |--> sumOut
- *                 | Sequence |   | Sequence |   ...   | Sequence |
- * initialState -->| Model    |-->| Model    |-->   -->| Model    |--> stateOut
- *                 +----------+   +----------+         +----------+
- *
- * @return true for success, false otherwise
- */
-bool SimpleSequenceModel::CreateModel() {
-  int32_t status;
-
-  // Create the ANeuralNetworksModel handle.
-  status = ANeuralNetworksModel_create(&model_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_create failed");
-    return false;
-  }
-
-  uint32_t dimensions[] = {dimLength_, dimLength_};
-  ANeuralNetworksOperandType float32TensorType{
-      .type = ANEURALNETWORKS_TENSOR_FLOAT32,
-      .dimensionCount = sizeof(dimensions) / sizeof(dimensions[0]),
-      .dimensions = dimensions,
-      .scale = 0.0f,
-      .zeroPoint = 0,
-  };
-  ANeuralNetworksOperandType scalarInt32Type{
-      .type = ANEURALNETWORKS_INT32,
-      .dimensionCount = 0,
-      .dimensions = nullptr,
-      .scale = 0.0f,
-      .zeroPoint = 0,
-  };
-
-  /**
-   * Add operands and operations to construct the model.
-   *
-   * Operands are implicitly identified by the order in which they are added to
-   * the model, starting from 0.
-   *
-   * These indexes are not returned by the model_addOperand call. The
-   * application must manage these values. Here, we use opIdx to do the
-   * bookkeeping.
-   */
-  uint32_t opIdx = 0;
-
-  // We first add the operand for the NONE activation function, and set its
-  // value to ANEURALNETWORKS_FUSED_NONE.
-  // This constant scalar operand will be used for both ADD and MUL.
-  status = ANeuralNetworksModel_addOperand(model_, &scalarInt32Type);
-  uint32_t fusedActivationFuncNone = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)",
-        fusedActivationFuncNone);
-    return false;
-  }
-  FuseCode fusedActivationCodeValue = ANEURALNETWORKS_FUSED_NONE;
-  status = ANeuralNetworksModel_setOperandValue(
-      model_, fusedActivationFuncNone, &fusedActivationCodeValue,
-      sizeof(fusedActivationCodeValue));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_setOperandValue failed for operand (%d)",
-        fusedActivationFuncNone);
-    return false;
-  }
-
-  // sumIn is one of the user provided input tensors to the trained model.
-  // Its value is determined pre-execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t sumIn = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", sumIn);
-    return false;
-  }
-
-  // stateIn is one of the user provided input tensors to the trained model.
-  // Its value is determined pre-execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t stateIn = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", stateIn);
-    return false;
-  }
-
-  // ratio is a constant tensor that was established during training.
-  // We read these values from the corresponding ANeuralNetworksMemory object.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t ratio = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", ratio);
-    return false;
-  }
-  status = ANeuralNetworksModel_setOperandValueFromMemory(
-      model_, ratio, memoryRatio_, 0, tensorSize_ * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_setOperandValueFromMemory failed "
-                        "for operand (%d)",
-                        ratio);
-    return false;
-  }
-
-  // sumOut is the output of the ADD operation.
-  // Its value will be computed during execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t sumOut = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", sumOut);
-    return false;
-  }
-
-  // stateOut is the output of the MUL operation.
-  // Its value will be computed during execution.
-  status = ANeuralNetworksModel_addOperand(model_, &float32TensorType);
-  uint32_t stateOut = opIdx++;
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksModel_addOperand failed for operand (%d)", stateOut);
-    return false;
-  }
-
-  // Add the ADD operation.
-  std::vector<uint32_t> addInputOperands = {
-      sumIn,
-      stateIn,
-      fusedActivationFuncNone,
-  };
-  status = ANeuralNetworksModel_addOperation(
-      model_, ANEURALNETWORKS_ADD, addInputOperands.size(),
-      addInputOperands.data(), 1, &sumOut);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_addOperation failed for ADD");
-    return false;
-  }
-
-  // Add the MUL operation.
-  std::vector<uint32_t> mulInputOperands = {
-      stateIn,
-      ratio,
-      fusedActivationFuncNone,
-  };
-  status = ANeuralNetworksModel_addOperation(
-      model_, ANEURALNETWORKS_MUL, mulInputOperands.size(),
-      mulInputOperands.data(), 1, &stateOut);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_addOperation failed for MUL");
-    return false;
-  }
-
-  // Identify the input and output tensors to the model.
-  // Inputs: {sumIn, stateIn}
-  // Outputs: {sumOut, stateOut}
-  std::vector<uint32_t> modelInputs = {
-      sumIn,
-      stateIn,
-  };
-  std::vector<uint32_t> modelOutputs = {
-      sumOut,
-      stateOut,
-  };
-  status = ANeuralNetworksModel_identifyInputsAndOutputs(
-      model_, modelInputs.size(), modelInputs.data(), modelOutputs.size(),
-      modelOutputs.data());
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_identifyInputsAndOutputs failed");
-    return false;
-  }
-
-  // Finish constructing the model.
-  // The values of constant operands cannot be altered after
-  // the finish function is called.
-  status = ANeuralNetworksModel_finish(model_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksModel_finish failed");
-    return false;
-  }
-  return true;
-}
-
-/**
- * Compile the model.
- *
- * @return true for success, false otherwise
- */
-bool SimpleSequenceModel::CreateCompilation() {
-  int32_t status;
-
-  // Create the ANeuralNetworksCompilation object for the constructed model.
-  status = ANeuralNetworksCompilation_create(model_, &compilation_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksCompilation_create failed");
-    return false;
-  }
-
-  // Set the preference for the compilation_, so that the runtime and drivers
-  // can make better decisions.
-  // Here we prefer to get the answer quickly, so we choose
-  // ANEURALNETWORKS_PREFER_FAST_SINGLE_ANSWER.
-  status = ANeuralNetworksCompilation_setPreference(
-      compilation_, ANEURALNETWORKS_PREFER_FAST_SINGLE_ANSWER);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksCompilation_setPreference failed");
-    return false;
-  }
-
-  // Finish the compilation.
-  status = ANeuralNetworksCompilation_finish(compilation_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksCompilation_finish failed");
-    return false;
-  }
-  return true;
-}
-
-/**
- * Create and initialize the opaque memory objects.
- *
- * Opaque memories are suitable for memories that are internal to NNAPI,
- * e.g. state tensors or intermediate results. Using opaque memories may
- * reduce the data copying and transformation overhead.
- *
- * In this example, only the initial sum, the initial state, and the final sum
- * are interesting to us. We do not need to know the intermediate results. So,
- * we create two pairs of opaque memories for intermediate sums and states.
- *
- * @return true for success, false otherwise
- */
-bool SimpleSequenceModel::CreateOpaqueMemories() {
-  int32_t status;
-
-  // Create opaque memories for sum tensors.
-  // We start from creating a memory descriptor and describing all of the
-  // intended memory usages.
-  ANeuralNetworksMemoryDesc* sumDesc = nullptr;
-  status = ANeuralNetworksMemoryDesc_create(&sumDesc);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_create failed");
-    return false;
-  }
-
-  // Specify that the state memory will be used as the first input (sumIn)
-  // of the compilation. Note that the index "0" here means the first operand
-  // of the modelInputs list {sumIn, stateIn}, which means sumIn.
-  status =
-      ANeuralNetworksMemoryDesc_addInputRole(sumDesc, compilation_, 0, 1.0f);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_addInputRole failed");
-    ANeuralNetworksMemoryDesc_free(sumDesc);
-    return false;
-  }
-
-  // Specify that the state memory will also be used as the first output
-  // (sumOut) of the compilation. Note that the index "0" here means the
-  // first operand of the modelOutputs list {sumOut, stateOut}, which means
-  // sumOut.
-  status =
-      ANeuralNetworksMemoryDesc_addOutputRole(sumDesc, compilation_, 0, 1.0f);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_addOutputRole failed");
-    ANeuralNetworksMemoryDesc_free(sumDesc);
-    return false;
-  }
-
-  // Finish the memory descriptor.
-  status = ANeuralNetworksMemoryDesc_finish(sumDesc);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_finish failed");
-    ANeuralNetworksMemoryDesc_free(sumDesc);
-    return false;
-  }
-
-  // Create two opaque memories from the finished descriptor: one for input
-  // and one for output. We will swap the two memories after each single
-  // execution step.
-  status = ANeuralNetworksMemory_createFromDesc(sumDesc, &memoryOpaqueSumIn_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksMemory_createFromDesc failed for sum memory #1");
-    ANeuralNetworksMemoryDesc_free(sumDesc);
-    return false;
-  }
-  status = ANeuralNetworksMemory_createFromDesc(sumDesc, &memoryOpaqueSumOut_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksMemory_createFromDesc failed for sum memory #2");
-    ANeuralNetworksMemoryDesc_free(sumDesc);
-    return false;
-  }
-
-  // It is safe to free the memory descriptor once all of the memories have
-  // been created.
-  ANeuralNetworksMemoryDesc_free(sumDesc);
-
-  // Create opaque memories for state tensors.
-  // We start from creating a memory descriptor and describing all of the
-  // intended memory usages.
-  ANeuralNetworksMemoryDesc* stateDesc = nullptr;
-  status = ANeuralNetworksMemoryDesc_create(&stateDesc);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_create failed");
-    return false;
-  }
-
-  // Specify that the state memory will be used as the second input (stateIn)
-  // of the compilation. Note that the index "1" here means the second operand
-  // of the modelInputs list {sumIn, stateIn}, which means stateIn.
-  status =
-      ANeuralNetworksMemoryDesc_addInputRole(stateDesc, compilation_, 1, 1.0f);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_addInputRole failed");
-    ANeuralNetworksMemoryDesc_free(stateDesc);
-    return false;
-  }
-
-  // Specify that the state memory will also be used as the second output
-  // (stateOut) of the compilation. Note that the index "1" here means the
-  // second operand of the modelOutputs list {sumOut, stateOut}, which means
-  // stateOut.
-  status =
-      ANeuralNetworksMemoryDesc_addOutputRole(stateDesc, compilation_, 1, 1.0f);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_addOutputRole failed");
-    ANeuralNetworksMemoryDesc_free(stateDesc);
-    return false;
-  }
-
-  // Finish the memory descriptor.
-  status = ANeuralNetworksMemoryDesc_finish(stateDesc);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksMemoryDesc_finish failed");
-    ANeuralNetworksMemoryDesc_free(stateDesc);
-    return false;
-  }
-
-  // Create two opaque memories from the finished descriptor: one for input
-  // and one for output. We will swap the two memories after each single
-  // execution step.
-  status =
-      ANeuralNetworksMemory_createFromDesc(stateDesc, &memoryOpaqueStateIn_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksMemory_createFromDesc failed for state memory #1");
-    ANeuralNetworksMemoryDesc_free(stateDesc);
-    return false;
-  }
-  status =
-      ANeuralNetworksMemory_createFromDesc(stateDesc, &memoryOpaqueStateOut_);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksMemory_createFromDesc failed for state memory #2");
-    ANeuralNetworksMemoryDesc_free(stateDesc);
-    return false;
-  }
-
-  // It is safe to free the memory descriptor once all of the memories have
-  // been created.
-  ANeuralNetworksMemoryDesc_free(stateDesc);
-  return true;
-}
-
-/**
- * Dispatch a single computation step of accumulating the geometric progression.
- */
-static bool DispatchSingleStep(
-    ANeuralNetworksCompilation* compilation, ANeuralNetworksMemory* sumIn,
-    uint32_t sumInLength, ANeuralNetworksMemory* stateIn,
-    uint32_t stateInLength, ANeuralNetworksMemory* sumOut,
-    uint32_t sumOutLength, ANeuralNetworksMemory* stateOut,
-    uint32_t stateOutLength, const ANeuralNetworksEvent* waitFor,
-    ANeuralNetworksEvent** event) {
-  // Create an ANeuralNetworksExecution object from the compiled model.
-  ANeuralNetworksExecution* execution;
-  int32_t status = ANeuralNetworksExecution_create(compilation, &execution);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksExecution_create failed");
-    return false;
-  }
-
-  // Set the memory for the sumIn tensor.
-  // Note that the index "0" here means the first operand of the modelInputs
-  // list {sumIn, stateIn}, which means sumIn.
-  status = ANeuralNetworksExecution_setInputFromMemory(
-      execution, 0, nullptr, sumIn, 0, sumInLength * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksExecution_setInputFromMemory failed for sumIn");
-    return false;
-  }
-
-  // Set the memory for the stateIn tensor.
-  // Note that the index "1" here means the first operand of the modelInputs
-  // list {sumIn, stateIn}, which means stateIn.
-  status = ANeuralNetworksExecution_setInputFromMemory(
-      execution, 1, nullptr, stateIn, 0, stateInLength * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksExecution_setInputFromMemory failed for stateIn");
-    return false;
-  }
-
-  // Set the sumOut tensor that will be filled by executing the model.
-  status = ANeuralNetworksExecution_setOutputFromMemory(
-      execution, 0, nullptr, sumOut, 0, sumOutLength * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksExecution_setOutputFromMemory failed for sumOut");
-    return false;
-  }
-
-  // Set the stateOut tensor that will be filled by executing the model.
-  status = ANeuralNetworksExecution_setOutputFromMemory(
-      execution, 1, nullptr, stateOut, 0, stateOutLength * sizeof(float));
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(
-        ANDROID_LOG_ERROR, LOG_TAG,
-        "ANeuralNetworksExecution_setOutputFromMemory failed for stateOut");
-    return false;
-  }
-
-  // Dispatch the execution of the model.
-  // Note that the execution here is asynchronous with dependencies.
-  const ANeuralNetworksEvent* const* dependencies = nullptr;
-  uint32_t numDependencies = 0;
-  if (waitFor != nullptr) {
-    dependencies = &waitFor;
-    numDependencies = 1;
-  }
-  status = ANeuralNetworksExecution_startComputeWithDependencies(
-      execution, dependencies, numDependencies,
-      0,  // infinite timeout duration
-      event);
-  if (status != ANEURALNETWORKS_NO_ERROR) {
-    __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                        "ANeuralNetworksExecution_compute failed");
-    return false;
-  }
-
-  ANeuralNetworksExecution_free(execution);
-  return true;
-}
-
-/**
- * Compute the sum of a geometric progression.
- *
- * @param   initialValue  the initial value of the geometric progression
- * @param   steps         the number of terms to accumulate
- * @return  computed result, or 0.0f if there is error.
- */
-bool SimpleSequenceModel::Compute(float initialValue, uint32_t steps,
-                                  float* result) {
-  if (!result) {
-    return false;
-  }
-  if (steps == 0) {
-    *result = 0.0f;
-    return true;
-  }
-
-  // Setup initial values.
-  // In reality, the values in the shared memory region will be manipulated by
-  // other modules or processes.
-  fillMemory(sumInFd_, tensorSize_, 0);
-  fillMemory(initialStateFd_, tensorSize_, initialValue);
-
-  // The event objects for all computation steps.
-  std::vector<ANeuralNetworksEvent*> events(steps, nullptr);
-
-  for (uint32_t i = 0; i < steps; i++) {
-    // We will only use ASharedMemory for boundary step executions, and use
-    // opaque memories for intermediate results to minimize the data copying.
-    // Note that when setting an opaque memory as the input or output of an
-    // execution, the offset and length must be set to 0 to indicate the
-    // entire memory region is used.
-    ANeuralNetworksMemory* sumInMemory;
-    ANeuralNetworksMemory* sumOutMemory;
-    ANeuralNetworksMemory* stateInMemory;
-    ANeuralNetworksMemory* stateOutMemory;
-    uint32_t sumInLength, sumOutLength, stateInLength, stateOutLength;
-    if (i == 0) {
-      sumInMemory = memorySumIn_;
-      sumInLength = tensorSize_;
-      stateInMemory = memoryInitialState_;
-      stateInLength = tensorSize_;
-    } else {
-      sumInMemory = memoryOpaqueSumIn_;
-      sumInLength = 0;
-      stateInMemory = memoryOpaqueStateIn_;
-      stateInLength = 0;
-    }
-    if (i == steps - 1) {
-      sumOutMemory = memorySumOut_;
-      sumOutLength = tensorSize_;
-    } else {
-      sumOutMemory = memoryOpaqueSumOut_;
-      sumOutLength = 0;
-    }
-    stateOutMemory = memoryOpaqueStateOut_;
-    stateOutLength = 0;
-
-    // Dispatch a single computation step with a dependency on the previous
-    // step, if any. The actual computation will start once its dependency has
-    // finished.
-    const ANeuralNetworksEvent* waitFor = i == 0 ? nullptr : events[i - 1];
-    if (!DispatchSingleStep(compilation_, sumInMemory, sumInLength,
-                            stateInMemory, stateInLength, sumOutMemory,
-                            sumOutLength, stateOutMemory, stateOutLength,
-                            waitFor, &events[i])) {
-      __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
-                          "DispatchSingleStep failed for step %d", i);
-      return false;
-    }
-
-    // Swap the memory handles: the outputs from the current step execution
-    // will be fed in as the inputs of the next step execution.
-    std::swap(memoryOpaqueSumIn_, memoryOpaqueSumOut_);
-    std::swap(memoryOpaqueStateIn_, memoryOpaqueStateOut_);
-  }
-
-  // Since the events are chained, we only need to wait for the last one.
-  ANeuralNetworksEvent_wait(events.back());
-
-  // Get the results.
-  float* outputTensorPtr =
-      reinterpret_cast<float*>(mmap(nullptr, tensorSize_ * sizeof(float),
-                                    PROT_READ, MAP_SHARED, sumOutFd_, 0));
-  *result = outputTensorPtr[0];
-  munmap(outputTensorPtr, tensorSize_ * sizeof(float));
-
-  // Cleanup event objects.
-  for (auto* event : events) {
-    ANeuralNetworksEvent_free(event);
-  }
-  return true;
-}
-
-/**
- * SimpleSequenceModel Destructor.
- *
- * Release NN API objects and close the file descriptors.
- */
-SimpleSequenceModel::~SimpleSequenceModel() {
-  ANeuralNetworksCompilation_free(compilation_);
-  ANeuralNetworksModel_free(model_);
-
-  ANeuralNetworksMemory_free(memorySumIn_);
-  ANeuralNetworksMemory_free(memorySumOut_);
-  ANeuralNetworksMemory_free(memoryInitialState_);
-  ANeuralNetworksMemory_free(memoryRatio_);
-  close(initialStateFd_);
-  close(sumInFd_);
-  close(sumOutFd_);
-  close(ratioFd_);
-
-  ANeuralNetworksMemory_free(memoryOpaqueStateIn_);
-  ANeuralNetworksMemory_free(memoryOpaqueStateOut_);
-  ANeuralNetworksMemory_free(memoryOpaqueSumIn_);
-  ANeuralNetworksMemory_free(memoryOpaqueSumOut_);
-}

nn-samples/sequence/src/main/cpp/sequence_model.h

@@ -1,87 +0,0 @@
-/**
- * Copyright 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef NNAPI_SIMPLE_MODEL_H
-#define NNAPI_SIMPLE_MODEL_H
-
-// #include "neuralnetworks_wrapper.h"
-#include <android/NeuralNetworks.h>
-
-#include <memory>
-
-/**
- * SimpleSequenceModel
- * Build up the hardcoded graph of
- *
- *     sumIn ---+
- *              +--- ADD ---> sumOut
- *   stateIn ---+
- *              +--- MUL ---> stateOut
- *     ratio ---+
- *
- *   Operands are all 2-D TENSOR_FLOAT32 of:
- *       dimLength x dimLength
- *   with NO fused_activation operation
- *
- * This graph is used for computing a single step of accumulating a finite
- * geometry progression.
- *
- */
-class SimpleSequenceModel {
- public:
-  static std::unique_ptr<SimpleSequenceModel> Create(float ratio);
-
-  // Prefer using SimpleSequenceModel::Create.
-  explicit SimpleSequenceModel(float ratio);
-  ~SimpleSequenceModel();
-
-  bool Compute(float initialValue, uint32_t steps, float* result);
-
- private:
-  bool CreateSharedMemories();
-  bool CreateModel();
-  bool CreateCompilation();
-  bool CreateOpaqueMemories();
-
-  ANeuralNetworksModel* model_ = nullptr;
-  ANeuralNetworksCompilation* compilation_ = nullptr;
-
-  static constexpr uint32_t dimLength_ = 200;
-  static constexpr uint32_t tensorSize_ = dimLength_ * dimLength_;
-
-  const float ratio_;
-
-  // ASharedMemories. In reality, the values in the shared memory region will
-  // be manipulated by other modules or processes.
-  int initialStateFd_ = -1;
-  int ratioFd_ = -1;
-  int sumInFd_ = -1;
-  int sumOutFd_ = -1;
-  ANeuralNetworksMemory* memoryInitialState_ = nullptr;
-  ANeuralNetworksMemory* memoryRatio_ = nullptr;
-  ANeuralNetworksMemory* memorySumIn_ = nullptr;
-  ANeuralNetworksMemory* memorySumOut_ = nullptr;
-
-  // Opaque memories.
-  ANeuralNetworksMemory* memoryOpaqueStateIn_ = nullptr;
-  ANeuralNetworksMemory* memoryOpaqueStateOut_ = nullptr;
-  ANeuralNetworksMemory* memoryOpaqueSumIn_ = nullptr;
-  ANeuralNetworksMemory* memoryOpaqueSumOut_ = nullptr;
-};
-
-#define LOG_TAG "NNAPI_SEQUENCE"
-
-#endif  // NNAPI_SIMPLE_MODEL_H

nn-samples/sequence/src/main/java/com/example/android/sequence/MainActivity.java

@@ -1,139 +0,0 @@
-/**
- * Copyright 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.example.android.sequence;
-
-import android.app.Activity;
-import android.os.AsyncTask;
-import android.os.Bundle;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.EditText;
-import android.widget.TextView;
-import android.widget.Toast;
-
-public class MainActivity extends Activity {
-    // Used to load the 'native-lib' library on application startup.
-    static { System.loadLibrary("sequence"); }
-
-    private final String LOG_TAG = "NNAPI_SEQUENCE";
-    private long modelHandle = 0;
-
-    public native long initModel(float ratio);
-
-    public native float compute(float initialValue, int steps, long modelHandle);
-
-    public native void destroyModel(long modelHandle);
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-
-        Button resetButton = findViewById(R.id.reset_button);
-        resetButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                EditText ratioInput = findViewById(R.id.ratio_input);
-                String ratioStr = ratioInput.getText().toString();
-                if (ratioStr.isEmpty()) {
-                    Toast.makeText(getApplicationContext(), "Invalid ratio!", Toast.LENGTH_SHORT)
-                            .show();
-                    return;
-                }
-
-                if (modelHandle != 0) {
-                    destroyModel(modelHandle);
-                    modelHandle = 0;
-                }
-                TextView ratioText = findViewById(R.id.ratio_text);
-                TextView resultText = findViewById(R.id.result_text);
-                ratioText.setText(ratioStr);
-                resultText.setText(R.string.none);
-                new InitModelTask().execute(Float.valueOf(ratioStr));
-            }
-        });
-
-        Button computeButton = findViewById(R.id.compute_button);
-        computeButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                if (modelHandle != 0) {
-                    EditText initialValueInput = findViewById(R.id.initial_value_input);
-                    EditText stepsInput = findViewById(R.id.steps_input);
-                    String initialValueStr = initialValueInput.getText().toString();
-                    String stepsStr = stepsInput.getText().toString();
-                    if (initialValueStr.isEmpty() || stepsStr.isEmpty()) {
-                        Toast.makeText(getApplicationContext(), "Invalid initial value or steps!",
-                                     Toast.LENGTH_SHORT)
-                                .show();
-                        return;
-                    }
-                    new ComputeTask().execute(initialValueStr, stepsStr);
-                } else {
-                    Toast.makeText(getApplicationContext(), "Model has not been initialized!",
-                                 Toast.LENGTH_SHORT)
-                            .show();
-                }
-            }
-        });
-    }
-
-    @Override
-    protected void onDestroy() {
-        if (modelHandle != 0) {
-            destroyModel(modelHandle);
-            modelHandle = 0;
-        }
-        super.onDestroy();
-    }
-
-    private class InitModelTask extends AsyncTask<Float, Void, Long> {
-        @Override
-        protected Long doInBackground(Float... inputs) {
-            if (inputs.length != 1) {
-                Log.e(LOG_TAG, "Incorrect number of input values");
-                return 0L;
-            }
-            // Prepare the model in a separate thread.
-            return initModel(inputs[0]);
-        }
-
-        @Override
-        protected void onPostExecute(Long result) {
-            modelHandle = result;
-        }
-    }
-
-    private class ComputeTask extends AsyncTask<String, Void, Float> {
-        @Override
-        protected Float doInBackground(String... inputs) {
-            if (inputs.length != 2) {
-                Log.e(LOG_TAG, "Incorrect number of input values");
-                return 0.0f;
-            }
-            // Reusing the same prepared model with different inputs.
-            return compute(Float.valueOf(inputs[0]), Integer.valueOf(inputs[1]), modelHandle);
-        }
-
-        @Override
-        protected void onPostExecute(Float result) {
-            TextView tv = findViewById(R.id.result_text);
-            tv.setText(String.valueOf(result));
-        }
-    }
-}

nn-samples/sequence/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -1,34 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:aapt="http://schemas.android.com/aapt"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportHeight="108"
-    android:viewportWidth="108">
-    <path
-        android:fillType="evenOdd"
-        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1">
-        <aapt:attr name="android:fillColor">
-            <gradient
-                android:endX="78.5885"
-                android:endY="90.9159"
-                android:startX="48.7653"
-                android:startY="61.0927"
-                android:type="linear">
-                <item
-                    android:color="#44000000"
-                    android:offset="0.0" />
-                <item
-                    android:color="#00000000"
-                    android:offset="1.0" />
-            </gradient>
-        </aapt:attr>
-    </path>
-    <path
-        android:fillColor="#FFFFFF"
-        android:fillType="nonZero"
-        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1" />
-</vector>

nn-samples/sequence/src/main/res/drawable/ic_launcher_background.xml

@@ -1,170 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportHeight="108"
-    android:viewportWidth="108">
-    <path
-        android:fillColor="#26A69A"
-        android:pathData="M0,0h108v108h-108z" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-</vector>

nn-samples/sequence/src/main/res/layout/activity_main.xml

@@ -1,179 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context="com.example.android.sequence.MainActivity">
-
-    <Button
-        android:id="@+id/compute_button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="8dp"
-        android:layout_marginBottom="52dp"
-        android:text="@string/compute"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/result_text"
-        tools:text="@string/compute" />
-
-    <Button
-        android:id="@+id/reset_button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginBottom="52dp"
-        android:text="@string/reset"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.464"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="0.174"
-        tools:text="@string/reset" />
-
-    <EditText
-        android:id="@+id/initial_value_input"
-        android:layout_width="161dp"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="264dp"
-        android:layout_marginEnd="92dp"
-        android:ems="10"
-        android:inputType="numberDecimal"
-        android:textAlignment="center"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-    <EditText
-        android:id="@+id/steps_input"
-        android:layout_width="161dp"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="316dp"
-        android:layout_marginEnd="88dp"
-        android:ems="10"
-        android:inputType="number"
-        android:textAlignment="center"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-    <TextView
-        android:id="@+id/steps_label"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="248dp"
-        android:text="@string/steps"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/ratio_input_label"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="@+id/ratio_input_label"
-        app:layout_constraintTop_toBottomOf="@+id/ratio_input_label"
-        tools:text="@string/steps" />
-    <TextView
-        android:id="@+id/initial_value_label"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="196dp"
-        android:text="@string/initial_value"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/ratio_input_label"
-        app:layout_constraintHorizontal_bias="0.966"
-        app:layout_constraintStart_toStartOf="@+id/ratio_input_label"
-        app:layout_constraintTop_toBottomOf="@+id/ratio_input_label"
-        tools:text="@string/initial_value" />
-    <EditText
-        android:id="@+id/ratio_input"
-        android:layout_width="161dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="40dp"
-        android:ems="10"
-        android:inputType="numberDecimal"
-        android:textAlignment="center"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/initial_value_input"
-        app:layout_constraintStart_toStartOf="@+id/initial_value_input"
-        app:layout_constraintTop_toTopOf="parent" />
-    <TextView
-        android:id="@+id/ratio_input_label"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="84dp"
-        android:layout_marginTop="52dp"
-        android:text="@string/ratio"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        android:visibility="visible"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        tools:text="@string/ratio" />
-    <TextView
-        android:id="@+id/ratio_text"
-        android:layout_width="161dp"
-        android:layout_height="32dp"
-        android:layout_marginStart="18dp"
-        android:layout_marginTop="136dp"
-        android:layout_marginEnd="8dp"
-        android:text="@string/none"
-        android:textAlignment="center"
-        android:textAllCaps="false"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/ratio_input"
-        app:layout_constraintHorizontal_bias="0.652"
-        app:layout_constraintStart_toEndOf="@+id/result_label"
-        app:layout_constraintStart_toStartOf="@+id/ratio_input"
-        app:layout_constraintTop_toBottomOf="@+id/ratio_input"
-        tools:text="@string/none" />
-    <TextView
-        android:id="@+id/ratio_text_label"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="140dp"
-        android:text="@string/ratio"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/ratio_input_label"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="@+id/ratio_input_label"
-        app:layout_constraintTop_toBottomOf="@+id/ratio_input_label"
-        tools:text="@string/ratio" />
-    <TextView
-        android:id="@+id/result_text"
-        android:layout_width="161dp"
-        android:layout_height="32dp"
-        android:layout_marginStart="18dp"
-        android:layout_marginTop="292dp"
-        android:layout_marginEnd="8dp"
-        android:text="@string/none"
-        android:textAlignment="center"
-        android:textAllCaps="false"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/ratio_input"
-        app:layout_constraintHorizontal_bias="0.957"
-        app:layout_constraintStart_toEndOf="@+id/result_label"
-        app:layout_constraintStart_toStartOf="@+id/ratio_input"
-        app:layout_constraintTop_toBottomOf="@+id/ratio_input"
-        tools:text="@string/none" />
-    <TextView
-        android:id="@+id/result_label"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="296dp"
-        android:text="@string/result"
-        android:textAppearance="@android:style/TextAppearance"
-        android:textSize="18sp"
-        app:layout_constraintEnd_toEndOf="@+id/ratio_input_label"
-        app:layout_constraintHorizontal_bias="0.941"
-        app:layout_constraintStart_toStartOf="@+id/ratio_input_label"
-        app:layout_constraintTop_toBottomOf="@+id/ratio_input_label"
-        tools:text="@string/result" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>

nn-samples/sequence/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

nn-samples/sequence/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

nn-samples/sequence/src/main/res/values/colors.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="colorPrimary">#3F51B5</color>
-    <color name="colorPrimaryDark">#303F9F</color>
-    <color name="colorAccent">#FF4081</color>
-</resources>

nn-samples/sequence/src/main/res/values/strings.xml

@@ -1,10 +0,0 @@
-<resources>
-    <string name="app_name">NN API Demo: sequence</string>
-    <string name="compute">Compute</string>
-    <string name="reset">Reset</string>
-    <string name="result">Result: </string>
-    <string name="initial_value">Initial Value: </string>
-    <string name="ratio">Ratio: </string>
-    <string name="steps">Steps: </string>
-    <string name="none">None</string>
-</resources>

nn-samples/sequence/src/main/res/values/styles.xml

@@ -1,8 +0,0 @@
-<resources>
-
-    <!-- Base application theme. -->
-    <style name="AppTheme" parent="android:Theme.Material.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
-    </style>
-
-</resources>

orderfile/app/src/main/cpp/CMakeLists.txt

@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.22.1)
 project(OrderfileDemo CXX)
 
+include(AppLibrary)
+
 # We have setup build variables that you can just comment or uncomment to use.
 # Make sure to have only one build variable uncommented at a time.
 # If you want to generate profiles and mapping file, make sure GENERATE_PROFILES is uncommented.
@@ -10,16 +12,16 @@ project(OrderfileDemo CXX)
 set(GENERATE_PROFILES ON)
 #set(USE_PROFILE "${CMAKE_SOURCE_DIR}/demo.orderfile")
 
-add_library(orderfiledemo SHARED orderfile.cpp)
+add_app_library(orderfiledemo SHARED orderfile.cpp)
 target_link_libraries(orderfiledemo log)
 
 if(GENERATE_PROFILES)
     # Generating profiles requires any optimization flag aside from -O0.
     # The mapping file will not generate and the profile instrumentation does not work without an optimization flag. 
-    target_compile_options(orderfiledemo PRIVATE -forder-file-instrumentation -O1 -mllvm -orderfile-write-mapping=mapping.txt )
-    target_link_options(orderfiledemo PRIVATE -forder-file-instrumentation )
+    target_compile_options(orderfiledemo PRIVATE -forder-file-instrumentation -O1 -mllvm -orderfile-write-mapping=mapping.txt)
+    target_link_options(orderfiledemo PRIVATE -forder-file-instrumentation)
     target_compile_definitions(orderfiledemo PRIVATE GENERATE_PROFILES)
 elseif(USE_PROFILE)
-    target_compile_options(orderfiledemo PRIVATE -Wl,--symbol-ordering-file=${USE_PROFILE} -Wl,--no-warn-symbol-ordering )
-    target_link_options(orderfiledemo PRIVATE -Wl,--symbol-ordering-file=${USE_PROFILE} -Wl,--no-warn-symbol-ordering )
+    target_compile_options(orderfiledemo PRIVATE -Wl,--symbol-ordering-file=${USE_PROFILE} -Wl,--no-warn-symbol-ordering)
+    target_link_options(orderfiledemo PRIVATE -Wl,--symbol-ordering-file=${USE_PROFILE} -Wl,--no-warn-symbol-ordering)
 endif()

prefab/README.md

@@ -1,94 +1,15 @@
-# Prefab Samples
+# Sample removed
 
-The samples in this directory demonstrate how to create and consume
-[C/C++ dependencies] with the Android Gradle Plugin. Dependencies are packaged
-within AARs using the [Prefab] package format. The Android Gradle Plugin
-natively supports producing and consuming these, so you do not need to worry
-about the details of the packaging format.
+The samples that used to reside in this directory have been removed. The
+behaviors demonstrated here (publication and consumption of AARs with native
+APIs) are now used throughout the samples for code sharing, and were Android
+Gradle Plugin features rather than NDK features.
 
-The individual samples will explain in more detail, but the typical workflow for
-a consumer of a native dependency is:
+For an example of how to create an AAR that exposes a native library, see the
+`base` module, or any other with `buildFeatures { prefabPublishing = true }`.
 
-1. Enable the prefab build feature in your `build.gradle` file.
-1. Add the dependency to the dependencies block of your `build.gradle` file.
-1. Import the package in your `CMakeLists.txt` or `Android.mk` file.
-1. Link the dependencies to your libraries.
+For examples of how to consume native APIs from an AAR, see any of the other
+samples which set `buildFeatures { prefab = true }`.
 
-Linking the dependency to your library will automatically make the headers
-available, link the required libraries, and include the dependencies you use in
-your application or library.
-
-To produce an AAR that exposes C/C++ APIs:
-
-1. Enable the `prefabPublishing` build feature in your `build.gradle` file.
-1. Use `android.prefab` in your `build.gradle` file to declare the names of the
-   libraries you wish to export and the headers that define their interface.
-
-To test your packages, follow the steps for package consumers. Note that until
-https://issuetracker.google.com/120166563 is fixed it is not possible to depend
-on the native components of an AAR generated by another module of the same
-project when using Android Studio. Instead, test in a separate project. You can
-import the AAR into your test project either
-[directly](https://developer.android.com/studio/projects/android-library#AddDependency)
-or by publishing it to a Maven repository.
-
-With that in mind, the samples here collectively demonstrate prefab usage:
-
-- prefab-publishing shows how to create an AAR for distributing native libraries
-- prefab-dependency shows how to import native dependencies from [GMaven]
-- curl-ssl: for shows to use 2 very specific and important AARs (curl and ssl)
-
-## Prefab Availability
-
-Support for Prefab packages has been available Android Gradle Plugin since
-version 4.0:
-
-- Consuming native dependencies requires AGP 4.0+
-- Generating AARs that export native dependencies requires AGP 4.1+
-
-The AARs used by the samples here are hosted at [Google Maven], but you can host
-your AARs anywhere accessible to gradle.
-
-## Pre-requisites
-
-- Android Gradle Plugin 4.0+
-- The [Android NDK](https://developer.android.com/ndk/)
-
-Please check for the individial sample's README.md for anything specific to that
-sample.
-
-## Support
-
-If you've found an error in these samples, please
-[file an issue](https://github.com/android/ndk-samples/issues/new).
-
-Patches are encouraged, and may be submitted by
-[forking this project](https://github.com/android/ndk-samples/fork) and
-submitting a pull request through GitHub. Please see
-[CONTRIBUTING.md](../CONTRIBUTING.md) for more details.
-
-- [Stack Overflow](http://stackoverflow.com/questions/tagged/android-ndk)
-- [Android Tools Feedbacks](http://tools.android.com/feedback)
-
-## License
-
-Copyright 2020 Google, Inc.
-
-Licensed to the Apache Software Foundation (ASF) under one or more contributor
-license agreements. See the NOTICE file distributed with this work for
-additional information regarding copyright ownership. The ASF licenses this file
-to you under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software distributed
-under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-CONDITIONS OF ANY KIND, either express or implied. See the License for the
-specific language governing permissions and limitations under the License.
-
-[c/c++ dependencies]: https://developer.android.com/studio/build/native-dependencies?buildsystem=cmake&agpversion=4.0
-[gmaven]: (https://maven.google.com/web/index.html?q=ndk#com.android.ndk.thirdparty)
-[google maven]: https://maven.google.com/web/index.html#com.android.ndk.thirdparty
-[prefab]: https://google.github.io/prefab
+See https://developer.android.com/build/native-dependencies for the Android
+Gradle Plugin's documentation of these features.

prefab/curl-ssl/README.md

@@ -1,64 +0,0 @@
-# curl-ssl
-
-This sample shows how to import [curl] and [OpenSSL] from Google Maven to
-display a list of the most recent 10 reviews submitted to AOSP's code review
-system.
-
-One of the goals is demonstrate how to handle HTTPS certificates correctly as
-explained by
-[this Stack Overflow post](https://stackoverflow.com/a/30430033/632035): the
-root certificates presented by Android since ICS are not in the format OpenSSL
-expects, so we need to provide our own certificate file. We do this by
-downloading curl's cacert.pem and storing that in our assets directory, as
-described in
-[this Stack Overflow post](https://stackoverflow.com/a/31521185/632035).
-
-If you want to understand how to use C/C++ dependencies with AGP, refer to:
-
-- [prefab-dependency] and [prefab-publishing] samples in the same directory as
-  this one
-- [C/C++ dependencies] page for Android documentation for C/C++ dependencies
-
-## Pre-requisites
-
-- Android Gradle Plugin 4.0+
-- The [Android NDK](https://developer.android.com/ndk/).
-
-## Getting Started
-
-The C++ code in this sample can be built with either CMake (the default for this
-project) or ndk-build. To use ndk-build set the `ndkBuild` project property
-either in your `local.properties` file or on the command line by passing the
-`-PndkBuild` flag when building.
-
-To build with [Android Studio](http://developer.android.com/sdk/index.html):
-
-1. Open this project in Android Studio.
-1. Click *Run/Run 'app'*. If you want to debug/trace code, due to
-   [the SSL lib's known issue with lldb](https://github.com/android/ndk-samples/issues/740),
-   make sure to apply the recommendations there for a smooth debugging
-   experience.
-
-To build from the command line:
-
-1. Navigate to this directory in your terminal.
-1. Run `./gradlew installDebug` (or `gradlew.bat installDebug` on Windows).
-
-## Screenshots
-
-![screenshot](screenshot.png)
-
-## Support
-
-If you've found an error in these samples, please
-[file an issue](https://github.com/android/ndk-samples/issues/new).
-
-Patches are encouraged, and may be submitted by submitting a pull request
-through GitHub. Please see [CONTRIBUTING.md](../../CONTRIBUTING.md) for more
-details.
-
-[c/c++ dependencies]: https://developer.android.com/studio/build/native-dependencies?buildsystem=cmake&agpversion=4.0
-[curl]: https://curl.haxx.se/
-[openssl]: https://www.openssl.org/
-[prefab-dependency]: https://github.com/android/ndk-samples/blob/main/prefab/prefab-dependency
-[prefab-publishing]: https://github.com/android/ndk-samples/blob/main/prefab/prefab-publishing

prefab/curl-ssl/app/build.gradle

@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-plugins {
-    id "ndksamples.android.application"
-    id "ndksamples.android.kotlin"
-}
-
-android {
-    namespace 'com.example.curlssl'
-
-    defaultConfig {
-        applicationId "com.example.curlssl"
-        versionCode 1
-        versionName "1.0"
-
-        externalNativeBuild {
-            if (!project.hasProperty("ndkBuild")) {
-                cmake {
-                    arguments "-DANDROID_STL=c++_shared"
-                }
-            }
-        }
-
-        ndk {
-            // None of the ndkports libraries currently (August 2025) include
-            // riscv64 libraries.
-            abiFilters.remove("riscv64")
-        }
-    }
-
-    externalNativeBuild {
-        if (!project.hasProperty("ndkBuild")) {
-            cmake {
-                path "src/main/cpp/CMakeLists.txt"
-            }
-        } else {
-            ndkBuild {
-                path "src/main/cpp/Android.mk"
-            }
-        }
-    }
-
-    buildFeatures {
-        prefab = true
-    }
-}
-
-dependencies {
-    implementation libs.appcompat
-    implementation libs.androidx.constraintlayout
-    implementation libs.curl
-    implementation libs.jsoncpp
-    implementation libs.openssl
-}