Introduce AudioHardwareConfig for renderer side audio device info.

content/renderer/render_thread_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/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 37 matching lines @@
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "content/public/renderer/render_view_visitor.h"
 #include "content/renderer/devtools/devtools_agent_filter.h"
 #include "content/renderer/dom_storage/dom_storage_dispatcher.h"
 #include "content/renderer/dom_storage/webstoragearea_impl.h"
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
 #include "content/renderer/gpu/compositor_thread.h"
 #include "content/renderer/gpu/compositor_output_surface.h"
 #include "content/renderer/gpu/gpu_benchmarking_extension.h"
-#include "content/renderer/media/audio_hardware.h"
 #include "content/renderer/media/audio_input_message_filter.h"
 #include "content/renderer/media/audio_message_filter.h"
 #include "content/renderer/media/audio_renderer_mixer_manager.h"
 #include "content/renderer/media/media_stream_center.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/peer_connection_tracker.h"
+#include "content/renderer/media/renderer_audio_hardware_config.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
 #include "content/renderer/media/video_capture_message_filter.h"
 #include "content/renderer/p2p/socket_dispatcher.h"
 #include "content/renderer/plugin_channel_host.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
 #include "grit/content_resources.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_forwarding_message_filter.h"
@@ skipping 815 matching lines @@
             GURL("chrome://gpu/RenderThreadImpl::GetGpuVDAContext3D")));
     if (gpu_vda_context3d_.get())
       gpu_vda_context3d_->setContextLostCallback(context_lost_cb_.get());
   }
   return gpu_vda_context3d_.get();
 }
 
 AudioRendererMixerManager* RenderThreadImpl::GetAudioRendererMixerManager() {
   if (!audio_renderer_mixer_manager_.get()) {
     audio_renderer_mixer_manager_.reset(new AudioRendererMixerManager(
-        GetAudioOutputSampleRate(),
-        GetAudioOutputBufferSize()));
+        GetAudioHardwareConfig()));
   }
 
   return audio_renderer_mixer_manager_.get();
 }
 
+RendererAudioHardwareConfig* RenderThreadImpl::GetAudioHardwareConfig() {
+  if (!audio_hardware_config_)

[miu, 2013/01/29 04:55:43]

Nice.  I was wondering whether a render process had to block on start-up when
audio is never used.

+    audio_hardware_config_.reset(new RendererAudioHardwareConfig());
+
+  return audio_hardware_config_.get();
+}
+
 #if defined(OS_WIN)
 void RenderThreadImpl::PreCacheFontCharacters(const LOGFONT& log_font,
                                               const string16& str) {
   Send(new ViewHostMsg_PreCacheFontCharacters(log_font, str));
 }
 
 void RenderThreadImpl::PreCacheFont(const LOGFONT& log_font) {
   Send(new ChildProcessHostMsg_PreCacheFont(log_font));
 }
 
@@ skipping 235 matching lines @@
 RenderThreadImpl::GetFileThreadMessageLoopProxy() {
   DCHECK(message_loop() == MessageLoop::current());
   if (!file_thread_.get()) {
     file_thread_.reset(new base::Thread("Renderer::FILE"));
     file_thread_->Start();
   }
   return file_thread_->message_loop_proxy();
 }
 
 }  // namespace content