Pass more detailed audio hardware configuration information to the renderer

content/renderer/renderer_webkitplatformsupport_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/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
@@ skipping 614 matching lines @@
 double RendererWebKitPlatformSupportImpl::audioHardwareSampleRate() {
   RenderThreadImpl* thread = RenderThreadImpl::current();
   return thread->GetAudioHardwareConfig()->GetOutputSampleRate();
 }
 
 size_t RendererWebKitPlatformSupportImpl::audioHardwareBufferSize() {
   RenderThreadImpl* thread = RenderThreadImpl::current();
   return thread->GetAudioHardwareConfig()->GetOutputBufferSize();
 }
 
+unsigned RendererWebKitPlatformSupportImpl::audioHardwareOutputChannels() {

[DaleCurtis, 2013/03/07 02:41:39]

Should this just be size_t?

[Chris Rogers, 2013/03/09 01:37:50]

It's part of the WebKit API, so it has to match that.  Also, it's consistent
with how we represent channels in WebKit

+  RenderThreadImpl* thread = RenderThreadImpl::current();
+  return thread->GetAudioHardwareConfig()->GetOutputChannels();
+}
+
 // TODO(crogers): remove deprecated API as soon as WebKit calls new API.
 WebAudioDevice*
 RendererWebKitPlatformSupportImpl::createAudioDevice(
     size_t buffer_size,
     unsigned channels,
     double sample_rate,
     WebAudioDevice::RenderCallback* callback) {
   return createAudioDevice(
       buffer_size, 0, channels, sample_rate, callback, "default");
 }
@@ skipping 204 matching lines @@
 //------------------------------------------------------------------------------
 
 bool RendererWebKitPlatformSupportImpl::processMemorySizesInBytes(
     size_t* private_bytes, size_t* shared_bytes) {
   content::RenderThread::Get()->Send(
       new ViewHostMsg_GetProcessMemorySizes(private_bytes, shared_bytes));
   return true;
 }
 
 }  // namespace content