mirror of
https://github.com/android/ndk-samples
synced 2025-11-12 04:00:01 +08:00
329 lines
9.5 KiB
C++
329 lines
9.5 KiB
C++
/*
|
|
* Copyright (C) 2014 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 the native AMedia* APIs.
|
|
* See the corresponding Java source file located at:
|
|
*
|
|
* src/com/example/nativecodec/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 <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
|
|
#include "looper.h"
|
|
#include "media/NdkMediaCodec.h"
|
|
#include "media/NdkMediaExtractor.h"
|
|
|
|
// for __android_log_print(ANDROID_LOG_INFO, "YourApp", "formatted message");
|
|
#include <android/log.h>
|
|
#define TAG "NativeCodec"
|
|
#define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, TAG, __VA_ARGS__)
|
|
|
|
// for native window JNI
|
|
#include <android/native_window_jni.h>
|
|
|
|
typedef struct {
|
|
int fd;
|
|
ANativeWindow* window;
|
|
AMediaExtractor* ex;
|
|
AMediaCodec *codec;
|
|
int64_t renderstart;
|
|
bool sawInputEOS;
|
|
bool sawOutputEOS;
|
|
bool isPlaying;
|
|
bool renderonce;
|
|
} workerdata;
|
|
|
|
workerdata data = {-1, NULL, NULL, NULL, 0, false, false, false, false};
|
|
|
|
enum {
|
|
kMsgCodecBuffer,
|
|
kMsgPause,
|
|
kMsgResume,
|
|
kMsgPauseAck,
|
|
kMsgDecodeDone,
|
|
kMsgSeek,
|
|
};
|
|
|
|
|
|
|
|
class mylooper: public looper {
|
|
virtual void handle(int what, void* obj);
|
|
};
|
|
|
|
static mylooper *mlooper = NULL;
|
|
|
|
int64_t systemnanotime() {
|
|
timespec now;
|
|
clock_gettime(CLOCK_MONOTONIC, &now);
|
|
return now.tv_sec * 1000000000LL + now.tv_nsec;
|
|
}
|
|
|
|
void doCodecWork(workerdata *d) {
|
|
|
|
ssize_t bufidx = -1;
|
|
if (!d->sawInputEOS) {
|
|
bufidx = AMediaCodec_dequeueInputBuffer(d->codec, 2000);
|
|
LOGV("input buffer %zd", bufidx);
|
|
if (bufidx >= 0) {
|
|
size_t bufsize;
|
|
uint8_t *buf = AMediaCodec_getInputBuffer(d->codec, bufidx, &bufsize);
|
|
ssize_t sampleSize = AMediaExtractor_readSampleData(d->ex, buf, bufsize);
|
|
if (sampleSize < 0) {
|
|
sampleSize = 0;
|
|
d->sawInputEOS = true;
|
|
LOGV("EOS");
|
|
}
|
|
int64_t presentationTimeUs = AMediaExtractor_getSampleTime(d->ex);
|
|
|
|
AMediaCodec_queueInputBuffer(d->codec, bufidx, 0, sampleSize, presentationTimeUs,
|
|
d->sawInputEOS ? AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM : 0);
|
|
AMediaExtractor_advance(d->ex);
|
|
}
|
|
}
|
|
|
|
if (!d->sawOutputEOS) {
|
|
AMediaCodecBufferInfo info;
|
|
ssize_t status = AMediaCodec_dequeueOutputBuffer(d->codec, &info, 0);
|
|
if (status >= 0) {
|
|
if (info.flags & AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM) {
|
|
LOGV("output EOS");
|
|
d->sawOutputEOS = true;
|
|
}
|
|
int64_t presentationNano = info.presentationTimeUs * 1000;
|
|
if (d->renderstart < 0) {
|
|
d->renderstart = systemnanotime() - presentationNano;
|
|
}
|
|
int64_t delay = (d->renderstart + presentationNano) - systemnanotime();
|
|
if (delay > 0) {
|
|
usleep(delay / 1000);
|
|
}
|
|
AMediaCodec_releaseOutputBuffer(d->codec, status, info.size != 0);
|
|
if (d->renderonce) {
|
|
d->renderonce = false;
|
|
return;
|
|
}
|
|
} else if (status == AMEDIACODEC_INFO_OUTPUT_BUFFERS_CHANGED) {
|
|
LOGV("output buffers changed");
|
|
} else if (status == AMEDIACODEC_INFO_OUTPUT_FORMAT_CHANGED) {
|
|
AMediaFormat *format = NULL;
|
|
format = AMediaCodec_getOutputFormat(d->codec);
|
|
LOGV("format changed to: %s", AMediaFormat_toString(format));
|
|
AMediaFormat_delete(format);
|
|
} else if (status == AMEDIACODEC_INFO_TRY_AGAIN_LATER) {
|
|
LOGV("no output buffer right now");
|
|
} else {
|
|
LOGV("unexpected info code: %zd", status);
|
|
}
|
|
}
|
|
|
|
if (!d->sawInputEOS || !d->sawOutputEOS) {
|
|
mlooper->post(kMsgCodecBuffer, d);
|
|
}
|
|
}
|
|
|
|
void mylooper::handle(int what, void* obj) {
|
|
switch (what) {
|
|
case kMsgCodecBuffer:
|
|
doCodecWork((workerdata*)obj);
|
|
break;
|
|
|
|
case kMsgDecodeDone:
|
|
{
|
|
workerdata *d = (workerdata*)obj;
|
|
AMediaCodec_stop(d->codec);
|
|
AMediaCodec_delete(d->codec);
|
|
AMediaExtractor_delete(d->ex);
|
|
d->sawInputEOS = true;
|
|
d->sawOutputEOS = true;
|
|
}
|
|
break;
|
|
|
|
case kMsgSeek:
|
|
{
|
|
workerdata *d = (workerdata*)obj;
|
|
AMediaExtractor_seekTo(d->ex, 0, AMEDIAEXTRACTOR_SEEK_NEXT_SYNC);
|
|
AMediaCodec_flush(d->codec);
|
|
d->renderstart = -1;
|
|
d->sawInputEOS = false;
|
|
d->sawOutputEOS = false;
|
|
if (!d->isPlaying) {
|
|
d->renderonce = true;
|
|
post(kMsgCodecBuffer, d);
|
|
}
|
|
LOGV("seeked");
|
|
}
|
|
break;
|
|
|
|
case kMsgPause:
|
|
{
|
|
workerdata *d = (workerdata*)obj;
|
|
if (d->isPlaying) {
|
|
// flush all outstanding codecbuffer messages with a no-op message
|
|
d->isPlaying = false;
|
|
post(kMsgPauseAck, NULL, true);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case kMsgResume:
|
|
{
|
|
workerdata *d = (workerdata*)obj;
|
|
if (!d->isPlaying) {
|
|
d->renderstart = -1;
|
|
d->isPlaying = true;
|
|
post(kMsgCodecBuffer, d);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
extern "C" {
|
|
|
|
jboolean Java_com_example_nativecodec_NativeCodec_createStreamingMediaPlayer(JNIEnv* env,
|
|
jclass clazz, jstring filename)
|
|
{
|
|
LOGV("@@@ create");
|
|
|
|
// convert Java string to UTF-8
|
|
const char *utf8 = env->GetStringUTFChars(filename, NULL);
|
|
LOGV("opening %s", utf8);
|
|
int fd = open(utf8, O_RDONLY);
|
|
env->ReleaseStringUTFChars(filename, utf8);
|
|
if (fd < 0) {
|
|
LOGV("failed: %d (%s)", fd, strerror(errno));
|
|
return JNI_FALSE;
|
|
}
|
|
|
|
data.fd = fd;
|
|
|
|
workerdata *d = &data;
|
|
|
|
AMediaExtractor *ex = AMediaExtractor_new();
|
|
media_status_t err = AMediaExtractor_setDataSourceFd(ex, d->fd, 0 , LONG_MAX);
|
|
close(d->fd);
|
|
if (err != AMEDIA_OK) {
|
|
LOGV("setDataSource error: %d", err);
|
|
return JNI_FALSE;
|
|
}
|
|
|
|
int numtracks = AMediaExtractor_getTrackCount(ex);
|
|
|
|
AMediaCodec *codec = NULL;
|
|
|
|
LOGV("input has %d tracks", numtracks);
|
|
for (int i = 0; i < numtracks; i++) {
|
|
AMediaFormat *format = AMediaExtractor_getTrackFormat(ex, i);
|
|
const char *s = AMediaFormat_toString(format);
|
|
LOGV("track %d format: %s", i, s);
|
|
const char *mime;
|
|
if (!AMediaFormat_getString(format, AMEDIAFORMAT_KEY_MIME, &mime)) {
|
|
LOGV("no mime type");
|
|
return JNI_FALSE;
|
|
} else if (!strncmp(mime, "video/", 6)) {
|
|
// Omitting most error handling for clarity.
|
|
// Production code should check for errors.
|
|
AMediaExtractor_selectTrack(ex, i);
|
|
codec = AMediaCodec_createDecoderByType(mime);
|
|
AMediaCodec_configure(codec, format, d->window, NULL, 0);
|
|
d->ex = ex;
|
|
d->codec = codec;
|
|
d->renderstart = -1;
|
|
d->sawInputEOS = false;
|
|
d->sawOutputEOS = false;
|
|
d->isPlaying = false;
|
|
d->renderonce = true;
|
|
AMediaCodec_start(codec);
|
|
}
|
|
AMediaFormat_delete(format);
|
|
}
|
|
|
|
mlooper = new mylooper();
|
|
mlooper->post(kMsgCodecBuffer, d);
|
|
|
|
return JNI_TRUE;
|
|
}
|
|
|
|
// set the playing state for the streaming media player
|
|
void Java_com_example_nativecodec_NativeCodec_setPlayingStreamingMediaPlayer(JNIEnv* env,
|
|
jclass clazz, jboolean isPlaying)
|
|
{
|
|
LOGV("@@@ playpause: %d", isPlaying);
|
|
if (mlooper) {
|
|
if (isPlaying) {
|
|
mlooper->post(kMsgResume, &data);
|
|
} else {
|
|
mlooper->post(kMsgPause, &data);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// shut down the native media system
|
|
void Java_com_example_nativecodec_NativeCodec_shutdown(JNIEnv* env, jclass clazz)
|
|
{
|
|
LOGV("@@@ shutdown");
|
|
if (mlooper) {
|
|
mlooper->post(kMsgDecodeDone, &data, true /* flush */);
|
|
mlooper->quit();
|
|
delete mlooper;
|
|
mlooper = NULL;
|
|
}
|
|
if (data.window) {
|
|
ANativeWindow_release(data.window);
|
|
data.window = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
// set the surface
|
|
void Java_com_example_nativecodec_NativeCodec_setSurface(JNIEnv *env, jclass clazz, jobject surface)
|
|
{
|
|
// obtain a native window from a Java surface
|
|
if (data.window) {
|
|
ANativeWindow_release(data.window);
|
|
data.window = NULL;
|
|
}
|
|
data.window = ANativeWindow_fromSurface(env, surface);
|
|
LOGV("@@@ setsurface %p", data.window);
|
|
}
|
|
|
|
|
|
// rewind the streaming media player
|
|
void Java_com_example_nativecodec_NativeCodec_rewindStreamingMediaPlayer(JNIEnv *env, jclass clazz)
|
|
{
|
|
LOGV("@@@ rewind");
|
|
mlooper->post(kMsgSeek, &data);
|
|
}
|
|
|
|
}
|