Refactor stopCapture to be asynchronous in VideoCapturerAndroid.

webrtc/api/android/java/src/org/webrtc/Camera2Capturer.java

 /*
  *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 759 matching lines @@
 
   @Override
   public List<CaptureFormat> getSupportedFormats() {
     synchronized (cameraState) {
       return Camera2Enumerator.getSupportedFormats(this.cameraManager, cameraName);
     }
   }
 
   @Override
   public void dispose() {
+    stopCapture();
+
     synchronized (cameraStateLock) {
       waitForCameraToStopIfStopping();
 
       if (cameraState != CameraState.IDLE) {
         throw new IllegalStateException("Unexpected camera state for dispose: " + cameraState);
       }
     }
   }
 
   // Blocks until camera is known to be stopped.
   @Override
   public void stopCapture() {
     final CountDownLatch cameraStoppingLatch = new CountDownLatch(1);
 
     Logging.d(TAG, "stopCapture");
     checkNotOnCameraThread();
 
     synchronized (cameraStateLock) {
       waitForCameraToStartIfStarting();
 
       if (cameraState != CameraState.RUNNING) {
-        Logging.w(TAG, "stopCapture called for already stopped camera.");
+        Logging.d(TAG, "stopCapture called for already stopped camera.");
         return;
       }
 
       postOnCameraThread(new Runnable() {
         @Override
         public void run() {
           Logging.d(TAG, "stopCaptureOnCameraThread");
 
           // Stop capture.
           closeAndRelease();
@@ skipping 69 matching lines @@
     rotation = (360 + rotation % 360) % 360;
 
     // Undo camera orientation - we report it as rotation instead.
     transformMatrix = RendererCommon.rotateTextureMatrix(transformMatrix, -cameraOrientation);
 
     cameraStatistics.addFrame();
     capturerObserver.onTextureFrameCaptured(captureFormat.width, captureFormat.height, oesTextureId,
         transformMatrix, rotation, timestampNs);
   }
 }