getUserMeida: report device starting states

media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera2.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.media;
 
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.ImageFormat;
 import android.graphics.Rect;
@@ skipping 79 matching lines @@
                 // notified of capture events, instead, CrImageReaderListener will trigger every
                 // time a downloaded image is ready. Since |handler| is null, we'll work on the
                 // current Thread Looper.
                 mPreviewSession.setRepeatingRequest(mPreviewRequest, null, null);
             } catch (CameraAccessException | SecurityException | IllegalStateException
                     | IllegalArgumentException ex) {
                 Log.e(TAG, "setRepeatingRequest: ", ex);
                 return;
             }
             // Now wait for trigger on CrImageReaderListener.onImageAvailable();
+            nativeOnStarted(mNativeVideoCaptureDeviceAndroid);
             changeCameraStateAndNotify(CameraState.STARTED);
         }
 
         @Override
         public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {
             // TODO(mcasas): When signalling error, C++ will tear us down. Is there need for
             // cleanup?
             changeCameraStateAndNotify(CameraState.STOPPED);
             nativeOnError(mNativeVideoCaptureDeviceAndroid, "Camera session configuration error");
         }
     };
 
     // Internal class implementing an ImageReader listener for Preview frames. Gets pinged when a
     // new frame is been captured and downloads it to memory-backed buffers.
     private class CrImageReaderListener implements ImageReader.OnImageAvailableListener {
         @Override
         public void onImageAvailable(ImageReader reader) {
+            synchronized (mCameraStateLock) {
+                if (mCameraState != CameraState.STARTED) return;
+            }
+
             try (Image image = reader.acquireLatestImage()) {
                 if (image == null) return;
 
                 if (image.getFormat() != ImageFormat.YUV_420_888 || image.getPlanes().length != 3) {
                     nativeOnError(mNativeVideoCaptureDeviceAndroid, "Unexpected image format: "
                             + image.getFormat() + " or #planes: " + image.getPlanes().length);
                     throw new IllegalStateException();
                 }
 
                 if (reader.getWidth() != image.getWidth()
@@ skipping 842 matching lines @@
             return false;
         }
         return true;
     }
 
     @Override
     public void deallocate() {
         Log.d(TAG, "deallocate");
     }
 }