Plumb render view ID to media observer

content/renderer/pepper/pepper_platform_audio_output_impl.cc

 // Copyright (c) 2012 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/renderer/pepper/pepper_platform_audio_output_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "build/build_config.h"
 #include "content/common/child_process.h"
 #include "content/common/media/audio_messages.h"
 #include "content/renderer/media/audio_hardware.h"
 #include "content/renderer/render_thread_impl.h"
+#include "content/renderer/render_view_impl.h"
 
 namespace content {
 
 // static
 PepperPlatformAudioOutputImpl* PepperPlatformAudioOutputImpl::Create(
+    RenderViewImpl* render_view,
     int sample_rate,
     int frames_per_buffer,
     webkit::ppapi::PluginDelegate::PlatformAudioOutputClient* client) {
   scoped_refptr<PepperPlatformAudioOutputImpl> audio_output(
       new PepperPlatformAudioOutputImpl);
-  if (audio_output->Initialize(sample_rate, frames_per_buffer, client)) {
+  if (audio_output->Initialize(render_view,
+                               sample_rate,
+                               frames_per_buffer,
+                               client)) {
     // Balanced by Release invoked in
     // PepperPlatformAudioOutputImpl::ShutDownOnIOThread().
     return audio_output.release();
   }
   return NULL;
 }
 
 bool PepperPlatformAudioOutputImpl::StartPlayback() {
   if (filter_) {
     ChildProcess::current()->io_message_loop()->PostTask(
@@ skipping 60 matching lines @@
 }
 
 PepperPlatformAudioOutputImpl::PepperPlatformAudioOutputImpl()
     : client_(NULL),
       stream_id_(0),
       main_message_loop_proxy_(base::MessageLoopProxy::current()) {
   filter_ = RenderThreadImpl::current()->audio_message_filter();
 }
 
 bool PepperPlatformAudioOutputImpl::Initialize(
+    RenderViewImpl* render_view,
     int sample_rate,
     int frames_per_buffer,
     webkit::ppapi::PluginDelegate::PlatformAudioOutputClient* client) {
   DCHECK(client);
   // Make sure we don't call init more than once.
   DCHECK_EQ(0, stream_id_);
 
+  render_view_ = render_view;
   client_ = client;
 
   media::AudioParameters::Format format;
   const int kMaxFramesForLowLatency = 2400;
   // Use the low latency back end if the client request is compatible, and
   // the sample count is low enough to justify using AUDIO_PCM_LOW_LATENCY.
   if (sample_rate == audio_hardware::GetOutputSampleRate() &&
       frames_per_buffer <= kMaxFramesForLowLatency &&
       frames_per_buffer % audio_hardware::GetOutputBufferSize() == 0) {
     format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY;
   } else {
     format = media::AudioParameters::AUDIO_PCM_LINEAR;
   }
 
   media::AudioParameters params(format, CHANNEL_LAYOUT_STEREO, sample_rate, 16,
                                 frames_per_buffer);
 
   ChildProcess::current()->io_message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&PepperPlatformAudioOutputImpl::InitializeOnIOThread,
                  this, params));
   return true;
 }
 
 void PepperPlatformAudioOutputImpl::InitializeOnIOThread(
     const media::AudioParameters& params) {
   stream_id_ = filter_->AddDelegate(this);
-  filter_->Send(new AudioHostMsg_CreateStream(stream_id_, params));
+  filter_->Send(new AudioHostMsg_CreateStream(
+      render_view_->routing_id(), stream_id_, params));
 }
 
 void PepperPlatformAudioOutputImpl::StartPlaybackOnIOThread() {
   if (stream_id_)
     filter_->Send(new AudioHostMsg_PlayStream(stream_id_));
 }
 
 void PepperPlatformAudioOutputImpl::StopPlaybackOnIOThread() {
   if (stream_id_)
     filter_->Send(new AudioHostMsg_PauseStream(stream_id_));
 }
 
 void PepperPlatformAudioOutputImpl::ShutDownOnIOThread() {
   // Make sure we don't call shutdown more than once.
   if (!stream_id_)
     return;
 
   filter_->Send(new AudioHostMsg_CloseStream(stream_id_));
   filter_->RemoveDelegate(stream_id_);
   stream_id_ = 0;
 
   Release();  // Release for the delegate, balances out the reference taken in
               // PepperPluginDelegateImpl::CreateAudio.
 }
 
 }  // namespace content