Part 1: Plumb render view ID to render host

content/renderer/render_view_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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 58 matching lines @@
 #include "content/renderer/idle_user_detector.h"
 #include "content/renderer/input_tag_speech_dispatcher.h"
 #include "content/renderer/java/java_bridge_dispatcher.h"
 #include "content/renderer/load_progress_tracker.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/media_stream_dispatcher.h"
 #include "content/renderer/media/media_stream_impl.h"
 #include "content/renderer/media/render_audiosourceprovider.h"
 #include "content/renderer/media/render_media_log.h"
 #include "content/renderer/media/renderer_gpu_video_decoder_factories.h"
+#include "content/renderer/media/renderer_webaudiodevice_impl.h"
 #include "content/renderer/mhtml_generator.h"
 #include "content/renderer/notification_provider.h"
 #include "content/renderer/p2p/socket_dispatcher.h"
 #include "content/renderer/plugin_channel_host.h"
 #include "content/renderer/render_process.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/render_view_mouse_lock_dispatcher.h"
 #include "content/renderer/render_widget_fullscreen_pepper.h"
 #include "content/renderer/renderer_accessibility.h"
 #include "content/renderer/renderer_accessibility_complete.h"
@@ skipping 2270 matching lines @@
   media::FilterCollection* collection = new media::FilterCollection();
   RenderMediaLog* render_media_log = new RenderMediaLog();
 
   RenderAudioSourceProvider* audio_source_provider = NULL;
 
   // Add in any custom filter factories first.
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   if (!cmd_line->HasSwitch(switches::kDisableAudio)) {
     // audio_source_provider is a "provider" to WebKit, and a sink
     // from the perspective of the audio renderer.
-    audio_source_provider = new RenderAudioSourceProvider();
+    audio_source_provider = new RenderAudioSourceProvider(routing_id_);
 
     // Add the chrome specific audio renderer, using audio_source_provider
     // as the sink.
     media::AudioRendererImpl* audio_renderer =
         new media::AudioRendererImpl(audio_source_provider);
     collection->AddAudioRenderer(audio_renderer);
   }
 
   // Accelerated video decode is not enabled by default on Linux.
   // crbug.com/137247
@@ skipping 39 matching lines @@
 
 WebApplicationCacheHost* RenderViewImpl::createApplicationCacheHost(
     WebFrame* frame, WebApplicationCacheHostClient* client) {
   if (!frame || !frame->view())
     return NULL;
   return new RendererWebApplicationCacheHostImpl(
       FromWebView(frame->view()), client,
       RenderThreadImpl::current()->appcache_dispatcher()->backend_proxy());
 }
 
+
+WebKit::WebAudioDevice*
+RenderViewImpl::createAudioDevice(
+    size_t bufferSize,
+    unsigned numberOfChannels,
+    double sampleRate,
+    WebKit::WebAudioDevice::RenderCallback* callback) {
+  ChannelLayout layout = CHANNEL_LAYOUT_UNSUPPORTED;
+
+  // The |numberOfChannels| does not exactly identify the channel layout of the
+  // device. The switch statement below assigns a best guess to the channel
+  // layout based on number of channels.
+  // TODO(crogers): WebKit should give the channel layout instead of the hard
+  // channel count. See http://crbug.com/139882.
+  switch (numberOfChannels) {
+    case 1:
+      layout = CHANNEL_LAYOUT_MONO;
+      break;
+    case 2:
+      layout = CHANNEL_LAYOUT_STEREO;
+      break;
+    case 3:
+      layout = CHANNEL_LAYOUT_2_1;
+      break;
+    case 4:
+      layout = CHANNEL_LAYOUT_4_0;
+      break;
+    case 5:
+      layout = CHANNEL_LAYOUT_5_0;
+      break;
+    case 6:
+      layout = CHANNEL_LAYOUT_5_1;
+      break;
+    case 7:
+      layout = CHANNEL_LAYOUT_7_0;
+      break;
+    case 8:
+      layout = CHANNEL_LAYOUT_7_1;
+      break;
+    default:
+      layout = CHANNEL_LAYOUT_STEREO;
+      break;
+  }
+
+  media::AudioParameters params(
+      media::AudioParameters::AUDIO_PCM_LOW_LATENCY, layout,
+      static_cast<int>(sampleRate), 16, bufferSize);
+
+  return new RendererWebAudioDeviceImpl(
+      routing_id_, params, callback);
+}
+
 WebCookieJar* RenderViewImpl::cookieJar(WebFrame* frame) {
   return &cookie_jar_;
 }
 
 void RenderViewImpl::frameDetached(WebFrame* frame) {
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, FrameDetached(frame));
 }
 
 void RenderViewImpl::willClose(WebFrame* frame) {
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, FrameWillClose(frame));
@@ skipping 3276 matching lines @@
 bool RenderViewImpl::WebWidgetHandlesCompositorScheduling() const {
   return !!RenderThreadImpl::current()->compositor_thread();
 }
 
 void RenderViewImpl::OnJavaBridgeInit() {
   DCHECK(!java_bridge_dispatcher_);
 #if defined(ENABLE_JAVA_BRIDGE)
   java_bridge_dispatcher_ = new JavaBridgeDispatcher(this);
 #endif
 }