Support external audio mixer.

webrtc/media/base/mediaengine.h

 /*
  *  Copyright (c) 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_MEDIA_BASE_MEDIAENGINE_H_
 #define WEBRTC_MEDIA_BASE_MEDIAENGINE_H_
 
 #if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
 #include <CoreAudio/CoreAudio.h>
 #endif
 
 #include <string>
 #include <vector>
 
+#include "webrtc/api/audio/audio_mixer.h"
 #include "webrtc/api/call/audio_state.h"
 #include "webrtc/api/rtpparameters.h"
 #include "webrtc/base/fileutils.h"
 #include "webrtc/base/sigslotrepeater.h"
 #include "webrtc/media/base/codec.h"
 #include "webrtc/media/base/mediachannel.h"
 #include "webrtc/media/base/videocommon.h"
 #include "webrtc/modules/audio_coding/codecs/audio_decoder_factory.h"
 
 #if defined(GOOGLE_CHROME_BUILD) || defined(CHROMIUM_BUILD)
@@ skipping 72 matching lines @@
  private:
   static MediaEngineCreateFunction create_function_;
 };
 #endif
 
 // CompositeMediaEngine constructs a MediaEngine from separate
 // voice and video engine classes.
 template<class VOICE, class VIDEO>
 class CompositeMediaEngine : public MediaEngineInterface {
  public:
-  CompositeMediaEngine(
-      webrtc::AudioDeviceModule* adm,
-      const rtc::scoped_refptr<webrtc::AudioDecoderFactory>&
-          audio_decoder_factory)
-      : voice_(adm, audio_decoder_factory) {}
+  CompositeMediaEngine(webrtc::AudioDeviceModule* adm,
+                       const rtc::scoped_refptr<webrtc::AudioDecoderFactory>&
+                           audio_decoder_factory,
+                       rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer)
+      : voice_(adm, audio_decoder_factory, audio_mixer) {}
   virtual ~CompositeMediaEngine() {}
   virtual bool Init() {
     video_.Init();
     return true;
   }
 
   virtual rtc::scoped_refptr<webrtc::AudioState> GetAudioState() const {
     return voice_.GetAudioState();
   }
   virtual VoiceMediaChannel* CreateChannel(webrtc::Call* call,
@@ skipping 44 matching lines @@
   virtual ~DataEngineInterface() {}
   virtual DataMediaChannel* CreateChannel(DataChannelType type) = 0;
   virtual const std::vector<DataCodec>& data_codecs() = 0;
 };
 
 webrtc::RtpParameters CreateRtpParametersWithOneEncoding();
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_BASE_MEDIAENGINE_H_