android: Don't do a thread jump for incoming frames.

webrtc/api/java/jni/androidvideocapturer_jni.cc

 /*
  *  Copyright 2015 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 163 matching lines @@
 
   rtc::scoped_refptr<webrtc::VideoFrameBuffer> buffer =
       buffer_pool_.CreateBuffer(width, height);
   libyuv::NV21ToI420(
       y_plane, width,
       vu_plane, width,
       buffer->MutableData(webrtc::kYPlane), buffer->stride(webrtc::kYPlane),
       buffer->MutableData(webrtc::kUPlane), buffer->stride(webrtc::kUPlane),
       buffer->MutableData(webrtc::kVPlane), buffer->stride(webrtc::kVPlane),
       width, height);
-  AsyncCapturerInvoke("OnIncomingFrame",
-                      &webrtc::AndroidVideoCapturer::OnIncomingFrame,
-                      buffer, rotation, timestamp_ns);
+
+  rtc::CritScope cs(&capturer_lock_);
+  if (!capturer_) {
+    LOG(LS_WARNING) << "OnMemoryBufferFrame() called for closed capturer.";
+    return;
+  }
+  capturer_->OnIncomingFrame(buffer, rotation, timestamp_ns);
 }
 
 void AndroidVideoCapturerJni::OnTextureFrame(int width,
                                              int height,
                                              int rotation,
                                              int64_t timestamp_ns,
                                              const NativeHandleImpl& handle) {
   rtc::scoped_refptr<webrtc::VideoFrameBuffer> buffer(
       surface_texture_helper_->CreateTextureFrame(width, height, handle));
 
-  AsyncCapturerInvoke("OnIncomingFrame",
-                      &webrtc::AndroidVideoCapturer::OnIncomingFrame,
-                      buffer, rotation, timestamp_ns);
+  rtc::CritScope cs(&capturer_lock_);
+  if (!capturer_) {
+    LOG(LS_WARNING) << "OnTextureFrame() called for closed capturer.";
+    return;
+  }
+  capturer_->OnIncomingFrame(buffer, rotation, timestamp_ns);
 }
 
 void AndroidVideoCapturerJni::OnOutputFormatRequest(int width,
                                                     int height,
                                                     int fps) {
   AsyncCapturerInvoke("OnOutputFormatRequest",
                       &webrtc::AndroidVideoCapturer::OnOutputFormatRequest,
                       width, height, fps);
 }
 
@@ skipping 29 matching lines @@
 
 JOW(void, VideoCapturer_00024NativeObserver_nativeOnOutputFormatRequest)
     (JNIEnv* jni, jclass, jlong j_capturer, jint j_width, jint j_height,
         jint j_fps) {
   LOG(LS_INFO) << "NativeObserver_nativeOnOutputFormatRequest";
   reinterpret_cast<AndroidVideoCapturerJni*>(j_capturer)->OnOutputFormatRequest(
       j_width, j_height, j_fps);
 }
 
 }  // namespace webrtc_jni