Implements camera error reporting.

Change-Id: I5f4f4cd1baab60053e827e0605a92a123c7a086f

tools/emulator/system/camera/CallbackNotifier.cpp

@@ -257,6 +257,13 @@ void CallbackNotifier::onNextFrameAvailable(const void* frame,
     }
 }
 
+void CallbackNotifier::onCameraDeviceError(int err)
+{
+    if (isMessageEnabled(CAMERA_MSG_ERROR) && mNotifyCB != NULL) {
+        mNotifyCB(CAMERA_MSG_ERROR, err, 0, mCBOpaque);
+    }
+}
+
 /****************************************************************************
  * Private API
  ***************************************************************************/

tools/emulator/system/camera/CallbackNotifier.h

@@ -159,6 +159,12 @@ public:
                               nsecs_t timestamp,
                               EmulatedCameraDevice* camera_dev);
 
+    /* Entry point for notifications that occur in camera device.
+     * Param:
+     *  err - CAMERA_ERROR_XXX error code.
+     */
+    void onCameraDeviceError(int err);
+
     /* Sets, or resets taking picture state.
      * This state control whether or not to notify the framework about compressed
      * image, shutter, and other picture related events.

tools/emulator/system/camera/EmulatedCamera.cpp

@@ -149,6 +149,12 @@ void EmulatedCamera::onNextFrameAvailable(const void* frame,
     mCallbackNotifier.onNextFrameAvailable(frame, timestamp, camera_dev);
 }
 
+void EmulatedCamera::onCameraDeviceError(int err)
+{
+    /* Errors are reported through the callback notifier */
+    mCallbackNotifier.onCameraDeviceError(err);
+}
+
 /****************************************************************************
  * Camera API implementation.
  ***************************************************************************/
@@ -559,7 +565,8 @@ status_t EmulatedCamera::doStartPreview()
         mPreviewWindow.stopPreview();
         return EINVAL;
     }
-    LOGD("Starting camera: %dx%d -> %.4s", width, height, pix_fmt);
+    LOGD("Starting camera: %dx%d -> %.4s(%s)",
+         width, height, reinterpret_cast<const char*>(&org_fmt), pix_fmt);
     res = camera_dev->startDevice(width, height, org_fmt);
     if (res != NO_ERROR) {
         mPreviewWindow.stopPreview();

tools/emulator/system/camera/EmulatedCamera.h

@@ -94,6 +94,12 @@ public:
                                       nsecs_t timestamp,
                                       EmulatedCameraDevice* camera_dev);
 
+    /* Entry point for notifications that occur in camera device.
+     * Param:
+     *  err - CAMERA_ERROR_XXX error code.
+     */
+    virtual void onCameraDeviceError(int err);
+
     /****************************************************************************
      * Camera API implementation
      ***************************************************************************/

tools/emulator/system/camera/EmulatedQemuCameraDevice.cpp

@@ -249,12 +249,13 @@ bool EmulatedQemuCameraDevice::inWorkerThread()
         /* Timestamp the current frame, and notify the camera HAL. */
         mCurFrameTimestamp = systemTime(SYSTEM_TIME_MONOTONIC);
         mCameraHAL->onNextFrameAvailable(mCurrentFrame, mCurFrameTimestamp, this);
+        return true;
     } else {
         LOGE("%s: Unable to get current video frame: %s",
              __FUNCTION__, strerror(query_res));
+        mCameraHAL->onCameraDeviceError(CAMERA_ERROR_SERVER_DIED);
+        return false;
     }
-
-    return true;
 }
 
 }; /* namespace android */