Switch AudioRenderSink::Callback to use AudioBus.

content/renderer/media/renderer_webaudiodevice_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/media/renderer_webaudiodevice_impl.h"
 
 #include "base/logging.h"
 #include "content/renderer/media/audio_device_factory.h"
 
 using content::AudioDeviceFactory;
@@ skipping 24 matching lines @@
   if (is_running_) {
     audio_device_->Stop();
     is_running_ = false;
   }
 }
 
 double RendererWebAudioDeviceImpl::sampleRate() {
   return 44100.0;
 }
 
-int RendererWebAudioDeviceImpl::Render(const std::vector<float*>& audio_data,
+int RendererWebAudioDeviceImpl::Render(media::AudioBus* audio_bus,
                                        int number_of_frames,
                                        int audio_delay_milliseconds) {
   // Make the client callback to get rendered audio.
   DCHECK(client_callback_);
   if (client_callback_) {
     // Wrap the pointers using WebVector.
-    WebVector<float*> web_audio_data(audio_data.size());
-    for (size_t i = 0; i < audio_data.size(); ++i)
-      web_audio_data[i] = audio_data[i];
+    WebVector<float*> web_audio_data(
+        static_cast<size_t>(audio_bus->channels()));
+    for (int i = 0; i < audio_bus->channels(); ++i)
+      web_audio_data[i] = audio_bus->channel(i);
 
     client_callback_->render(web_audio_data, number_of_frames);
   }
   return number_of_frames;
 }
 
 void RendererWebAudioDeviceImpl::OnRenderError() {
   // TODO(crogers): implement error handling.
 }