Renderer side audio device change wip...

content/renderer/media/audio_renderer_mixer_manager.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/media/audio_renderer_mixer_manager.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+// #include "content/renderer/media/audio_hardware.h"
 #include "content/renderer/media/audio_device_factory.h"
 #include "content/renderer/media/renderer_audio_output_device.h"
 #include "media/base/audio_renderer_mixer.h"
 #include "media/base/audio_renderer_mixer_input.h"
+#include "media/base/audio_hardware_config.h"
 
 namespace content {
 
-AudioRendererMixerManager::AudioRendererMixerManager(int hardware_sample_rate,
-                                                     int hardware_buffer_size)
-    : hardware_sample_rate_(hardware_sample_rate),
-      hardware_buffer_size_(hardware_buffer_size),
+// AudioRendererMixerManager::AudioRendererMixerManager(int hardware_sample_rate,
+//                                                      int hardware_buffer_size)
+//     : hardware_sample_rate_(hardware_sample_rate),
+//       hardware_buffer_size_(hardware_buffer_size),
+AudioRendererMixerManager::AudioRendererMixerManager(
+    media::AudioHardwareConfig* hardware_config)
+    : hardware_config_(hardware_config),
       sink_for_testing_(NULL) {
+  // TODO(dalecurtis): Fix this so that buffer size and sample rate are only
+  // passed in for testing.  Though RendererViewImpl still needs to initialize
+  // the AudioHardware cache...
 }
 
 AudioRendererMixerManager::~AudioRendererMixerManager() {
   DCHECK(mixers_.empty());
 }
 
 media::AudioRendererMixerInput* AudioRendererMixerManager::CreateInput(
     int source_render_view_id) {
   return new media::AudioRendererMixerInput(
       base::Bind(
           &AudioRendererMixerManager::GetMixer, base::Unretained(this),
           source_render_view_id),
       base::Bind(
           &AudioRendererMixerManager::RemoveMixer, base::Unretained(this),
           source_render_view_id));
 }
 
 void AudioRendererMixerManager::SetAudioRendererSinkForTesting(
     media::AudioRendererSink* sink) {
   sink_for_testing_ = sink;
 }
 
 media::AudioRendererMixer* AudioRendererMixerManager::GetMixer(
     int source_render_view_id,
     const media::AudioParameters& params) {
   const MixerKey key(source_render_view_id, params);
   base::AutoLock auto_lock(mixers_lock_);
 
-  AudioRendererMixerMap::iterator it = mixers_.find(key);
-  if (it != mixers_.end()) {
-    it->second.ref_count++;
-    return it->second.mixer;
-  }
+  // AudioRendererMixerMap::iterator it = mixers_.find(key);
+  // if (it != mixers_.end()) {
+  //   it->second.ref_count++;
+  //   return it->second.mixer;
+  // }
+
+  LOG(ERROR) << "Getting mixer...";
 
   // On Linux and ChromeOS we can rely on the playback device to handle
   // resampling, so don't waste cycles on it here.
-#if defined(OS_LINUX)
-  int sample_rate = params.sample_rate();
-#else
-  int sample_rate = hardware_sample_rate_;
-#endif
+// #if defined(OS_LINUX)
+//   int sample_rate = params.sample_rate();
+// #else
+//   int sample_rate = hardware_sample_rate_;
+// #endif
 
   // Create output parameters based on the audio hardware configuration for
   // passing on to the output sink.  Force to 16-bit output for now since we
   // know that works well for WebAudio and WebRTC.
   media::AudioParameters output_params(
       media::AudioParameters::AUDIO_PCM_LOW_LATENCY, params.channel_layout(),
-      sample_rate, 16, hardware_buffer_size_);
+      // hardware_sample_rate_, 16, hardware_buffer_size_);
+      hardware_config_->GetOutputSampleRate(), 16,
+      hardware_config_->GetOutputBufferSize());
+
+      // GetAudioOutputSampleRate(), 16, GetAudioOutputBufferSize());
+  // TODO(justinlin): Fix and uncomment the above.
+  LOG(ERROR) << "GetAudioOutputSampleRate() and GetAudioOutputBufferSize() will"
+             << " fail if no cache exists since we're not on the RenderThread!";
 
   // If we've created invalid output parameters, simply pass on the input params
   // and let the browser side handle automatic fallback.
   if (!output_params.IsValid())
     output_params = params;
 
+  IOParamsKey mixer_key = std::make_pair(params, output_params);
+  AudioRendererMixerMap::iterator it = mixers_.find(mixer_key);
+  if (it != mixers_.end()) {
+    it->second.ref_count++;
+    return it->second.mixer;
+  }
+
   media::AudioRendererMixer* mixer;
   if (sink_for_testing_) {
     mixer = new media::AudioRendererMixer(
         params, output_params, sink_for_testing_);
   } else {
     scoped_refptr<RendererAudioOutputDevice> device =
         AudioDeviceFactory::NewOutputDevice();
     device->SetSourceRenderView(source_render_view_id);
     mixer = new media::AudioRendererMixer(params, output_params, device);
   }
 
   AudioRendererMixerReference mixer_reference = { mixer, 1 };
-  mixers_[key] = mixer_reference;
+  // mixers_[key] = mixer_reference;
+  mixers_[mixer_key] = mixer_reference;
   return mixer;
 }
 
 void AudioRendererMixerManager::RemoveMixer(
     int source_render_view_id,
-    const media::AudioParameters& params) {
-  const MixerKey key(source_render_view_id, params);
+    media::AudioRendererMixer* mixer/*const media::AudioParameters& params*/) {
+// +void AudioRendererMixerManager::RemoveMixer(media::AudioRendererMixer* mixer) {
+   // base::AutoLock auto_lock(mixers_lock_);
+
+  // const MixerKey key(source_render_view_id, params);
   base::AutoLock auto_lock(mixers_lock_);
 
-  AudioRendererMixerMap::iterator it = mixers_.find(key);
+  // AudioRendererMixerMap::iterator it = mixers_.find(key);
+  IOParamsKey mixer_key = std::make_pair(
+      mixer->input_params(), mixer->output_params());
+
+  AudioRendererMixerMap::iterator it = mixers_.find(mixer_key);
   DCHECK(it != mixers_.end());
 
   // Only remove the mixer if AudioRendererMixerManager is the last owner.
   it->second.ref_count--;
   if (it->second.ref_count == 0) {
     delete it->second.mixer;
     mixers_.erase(it);
   }
 }
 
 }  // namespace content