Added initial set of logging for AudioOutputController.

content/browser/renderer_host/media/audio_output_delegate_impl.cc

 // Copyright 2016 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.
 
 #include "content/browser/renderer_host/media/audio_output_delegate_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "content/browser/media/audio_stream_monitor.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/renderer_host/media/audio_sync_reader.h"
+#include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/media_observer.h"
 #include "media/audio/audio_output_controller.h"
 
 namespace content {
 
 // This class trampolines callbacks from the controller to the delegate. Since
 // callbacks from the controller are stopped asynchronously, this class holds
 // a weak pointer to the delegate, allowing the delegate to stop callbacks
 // synchronously.
 class AudioOutputDelegateImpl::ControllerEventHandler
     : public media::AudioOutputController::EventHandler {
  public:
   explicit ControllerEventHandler(
       base::WeakPtr<AudioOutputDelegateImpl> delegate);
 
  private:
   void OnControllerCreated() override;
   void OnControllerPlaying() override;
   void OnControllerPaused() override;
   void OnControllerError() override;
 
+  void OnLog(const std::string& message) override;
+
   base::WeakPtr<AudioOutputDelegateImpl> delegate_;
 };
 
 AudioOutputDelegateImpl::ControllerEventHandler::ControllerEventHandler(
     base::WeakPtr<AudioOutputDelegateImpl> delegate)
     : delegate_(std::move(delegate)) {}
 
 void AudioOutputDelegateImpl::ControllerEventHandler::OnControllerCreated() {
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
@@ skipping 14 matching lines @@
       base::BindOnce(&AudioOutputDelegateImpl::UpdatePlayingState, delegate_,
                      false));
 }
 
 void AudioOutputDelegateImpl::ControllerEventHandler::OnControllerError() {
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::BindOnce(&AudioOutputDelegateImpl::OnError, delegate_));
 }
 
+void AudioOutputDelegateImpl::ControllerEventHandler::OnLog(
+    const std::string& message) {
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioOutputDelegateImpl::DoLog, delegate_, message));
+}
+
 std::unique_ptr<media::AudioOutputDelegate> AudioOutputDelegateImpl::Create(
     EventHandler* handler,
     media::AudioManager* audio_manager,
     std::unique_ptr<media::AudioLog> audio_log,
     AudioMirroringManager* mirroring_manager,
     MediaObserver* media_observer,
     int stream_id,
     int render_frame_id,
     int render_process_id,
     const media::AudioParameters& params,
@@ skipping 133 matching lines @@
   }
 }
 
 void AudioOutputDelegateImpl::OnError() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   audio_log_->OnError(stream_id_);
   subscriber_->OnStreamError(stream_id_);
 }
 
+void AudioOutputDelegateImpl::DoLog(const std::string& msg) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  std::ostringstream oss;
+  oss << "[stream_id=" << stream_id_ << "] " << msg;
+  const std::string message = oss.str();
+  content::MediaStreamManager::SendMessageToNativeLog(message);
+  DVLOG(1) << message;
+}
+
 media::AudioOutputController* AudioOutputDelegateImpl::GetControllerForTesting()
     const {
   return controller_.get();
 }
 
 }  // namespace content