content/renderer/media/renderer_audio_output_device.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/media/renderer_audio_output_device.h"
   6
   7 #include "base/bind.h"
   8 #include "base/message_loop_proxy.h"
   9 #include "content/renderer/media/audio_message_filter.h"
  10
  11 namespace content {
  12
  13 RendererAudioOutputDevice::RendererAudioOutputDevice(
  14     AudioMessageFilter* message_filter,
  15     const scoped_refptr<base::MessageLoopProxy>& io_loop)
  16     : AudioOutputDevice(message_filter, io_loop),
  17       source_render_view_id_(MSG_ROUTING_NONE),
  18       is_after_stream_created_(false) {
  19 }
  20
  21 RendererAudioOutputDevice::~RendererAudioOutputDevice() {}
  22
  23 void RendererAudioOutputDevice::Start() {
  24   AudioOutputDevice::Start();
  25   message_loop()->PostTask(
  26       FROM_HERE,
  27       base::Bind(&RendererAudioOutputDevice::OnStart, this));
  28 }
  29
  30 void RendererAudioOutputDevice::Stop() {
  31   AudioOutputDevice::Stop();
  32   message_loop()->PostTask(
  33       FROM_HERE,
  34       base::Bind(&RendererAudioOutputDevice::OnStop, this));
  35 }
  36
  37 void RendererAudioOutputDevice::SetSourceRenderView(int render_view_id) {
  38   message_loop()->PostTask(
  39       FROM_HERE,
  40       base::Bind(&RendererAudioOutputDevice::OnSourceChange, this,
  41                  render_view_id));
  42 }
  43
  44 void RendererAudioOutputDevice::OnStart() {
  45   is_after_stream_created_ = true;
  46   OnSourceChange(source_render_view_id_);
  47 }
  48
  49 void RendererAudioOutputDevice::OnStop() {
  50   is_after_stream_created_ = false;
  51 }
  52
  53 void RendererAudioOutputDevice::OnSourceChange(int render_view_id) {
  54   source_render_view_id_ = render_view_id;
  55   if (is_after_stream_created_ && source_render_view_id_ != MSG_ROUTING_NONE) {
  56     AudioMessageFilter* const filter =
  57         static_cast<AudioMessageFilter*>(audio_output_ipc());
  58     if (filter)
  59       filter->AssociateStreamWithProducer(stream_id(), source_render_view_id_);
  60   }
  61 }
  62
  63 }  // namespace content