Renderer side audio device change wip...

media/base/audio_renderer_mixer.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 "media/base/audio_renderer_mixer.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 
 namespace media {
 
 enum { kPauseDelaySeconds = 10 };
 
 AudioRendererMixer::AudioRendererMixer(
     const AudioParameters& input_params, const AudioParameters& output_params,
     const scoped_refptr<AudioRendererSink>& sink)
     : audio_sink_(sink),
       audio_converter_(input_params, output_params, true),
       pause_delay_(base::TimeDelta::FromSeconds(kPauseDelaySeconds)),
       last_play_time_(base::Time::Now()),
       // Initialize |playing_| to true since Start() results in an auto-play.
-      playing_(true) {
+      playing_(true),
+      input_params_(input_params),
+      output_params_(output_params) {
   audio_sink_->Initialize(output_params, this);
   audio_sink_->Start();
 }
 
 AudioRendererMixer::~AudioRendererMixer() {
   // AudioRendererSinks must be stopped before being destructed.
   audio_sink_->Stop();
 
   // Ensures that all mixer inputs have stopped themselves prior to destruction
   // and have called RemoveMixerInput().
@@ skipping 49 matching lines @@
 void AudioRendererMixer::OnRenderError() {
   base::AutoLock auto_lock(mixer_inputs_lock_);
 
   // Call each mixer input and signal an error.
   for (AudioRendererMixerInputSet::iterator it = mixer_inputs_.begin();
        it != mixer_inputs_.end(); ++it) {
     (*it)->OnRenderError();
   }
 }
 
+void AudioRendererMixer::OnDeviceChange() {
+  base::AutoLock auto_lock(mixer_inputs_lock_);
+
+  // Iterate and remove elements which receive an updated mixer.
+  for (AudioRendererMixerInputSet::iterator it = mixer_inputs_.begin();
+       it != mixer_inputs_.end(); ++it) {
+    (*it)->OnDeviceChange();
+  }
+}
+
+
 }  // namespace media