Looking up device id by session id for AudioRendererMixerInput

content/renderer/media/audio_device_factory.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
+#include "media/base/audio_renderer_mixer_sink.h"
 #include "media/base/audio_renderer_sink.h"
 
 namespace media {
 class AudioInputDevice;
-class AudioOutputDevice;
 }
 
 namespace url {
 class Origin;
 }
 
 namespace content {
 
 // A factory for creating AudioOutputDevices and AudioInputDevices.  There is a
 // global factory function that can be installed for the purposes of testing to
 // provide specialized implementations.
 class CONTENT_EXPORT AudioDeviceFactory {
  public:
   // Types of audio sources.
   enum SourceType {
     kSourceNone = 0,
     kSourceMediaElement,
     kSourceWebRtc,
     kSourceNonRtcAudioTrack,
     kSourceWebAudio,
     kSourceLast = kSourceWebAudio  // Only used for validation of format.
   };
 
-  // Creates an AudioOutputDevice.
+  // Creates a sink for AudioRemdererMixer.

[Guido Urdaneta, 2016/03/08 14:53:09]

typo: s/Remderer/Renderer

[o1ka, 2016/04/05 15:13:37]

Done.

   // |render_frame_id| refers to the RenderFrame containing the entity
   // producing the audio. If |session_id| is nonzero, it is used by the browser
   // to select the correct input device ID and its associated output device, if
   // it exists. If |session_id| is zero, |device_id| and |security_origin|
   // identify the output device to use.
   // If |session_id| is zero and |device_id| and |security_origin| are empty,
   // the default output device will be selected.
-  static scoped_refptr<media::AudioOutputDevice> NewOutputDevice(
+  static scoped_refptr<media::AudioRendererMixerSink> NewAudioRendererMixerSink(
       int render_frame_id,
       int session_id,
       const std::string& device_id,
       const url::Origin& security_origin);
 
   // Creates an AudioRendererSink bound to an AudioOutputDevice.
   // Basing on |source_type| and build configuration, audio played out through
   // the sink goes to AOD directly or can be mixed with other audio before that.
   // TODO(olka): merge it with NewRestartableOutputDevice() as soon as
   // AudioOutputDevice is fixed to be restartable.
@@ skipping 28 matching lines @@
       int render_frame_id);
 
  protected:
   AudioDeviceFactory();
   virtual ~AudioDeviceFactory();
 
   // You can derive from this class and specify an implementation for these
   // functions to provide alternate audio device implementations.
   // If the return value of either of these function is NULL, we fall back
   // on the default implementation.
-  virtual media::AudioOutputDevice* CreateOutputDevice(
+  virtual media::AudioRendererMixerSink* CreateAudioRendererMixerSink(
       int render_frame_id,
       int sesssion_id,
       const std::string& device_id,
       const url::Origin& security_origin) = 0;
 
   virtual media::AudioRendererSink* CreateAudioRendererSink(
       SourceType source_type,
       int render_frame_id,
       int sesssion_id,
       const std::string& device_id,
@@ skipping 12 matching lines @@
   // The current globally registered factory. This is NULL when we should
   // create the default AudioRendererSinks.
   static AudioDeviceFactory* factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_