Introduce AudioOutputResampler for browser side resampling.

media/audio/audio_manager_base.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 "media/audio/audio_manager_base.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop_proxy.h"
 #include "base/threading/thread.h"
 #include "media/audio/audio_output_dispatcher_impl.h"
 #include "media/audio/audio_output_proxy.h"
+#include "media/audio/audio_output_resampler.h"
 #include "media/audio/fake_audio_input_stream.h"
 #include "media/audio/fake_audio_output_stream.h"
 #include "media/base/media_switches.h"
 
 // TODO(dalecurtis): Temporarily disabled while switching pipeline to use float,
 // http://crbug.com/114700
 #if defined(ENABLE_AUDIO_MIXER)
 #include "media/audio/audio_output_mixer.h"
 #endif
 
@@ skipping 131 matching lines @@
         base::TimeDelta::FromSeconds(kStreamCloseDelaySeconds);
     // TODO(dalecurtis): Browser side mixing has a couple issues that must be
     // fixed before it can be turned on by default: http://crbug.com/138098 and
     // http://crbug.com/140247
 #if defined(ENABLE_AUDIO_MIXER)
     const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
     if (cmd_line->HasSwitch(switches::kEnableAudioMixer))
       dispatcher = new AudioOutputMixer(this, params, close_delay);
     else
 #endif
-      dispatcher = new AudioOutputDispatcherImpl(this, params, close_delay);
+      //dispatcher = new AudioOutputDispatcherImpl(this, params, close_delay);

[scherkus (not reviewing), 2012/09/07 13:30:16]

remove or is this supposed to be a flag?

[DaleCurtis, 2012/09/07 14:17:35]

Good question. I think it'll be removed. Should probably have a flag just for
A/B testing for issues.

[DaleCurtis, 2012/09/10 12:06:24]

Done.

+    dispatcher = new AudioOutputResampler(this, params, close_delay);
   }
   return new AudioOutputProxy(dispatcher);
 #endif  // defined(OS_IOS)
 }
 
 bool AudioManagerBase::CanShowAudioInputSettings() {
   return false;
 }
 
 void AudioManagerBase::ShowAudioInputSettings() {
@@ skipping 78 matching lines @@
       DCHECK(dispatcher->HasOneRef()) << "AudioOutputProxies are still alive";
       dispatcher = NULL;
     }
   }
 
   output_dispatchers_.clear();
 #endif  // defined(OS_IOS)
 }
 
 }  // namespace media