Line data    Source code

       1             : /* This Source Code Form is subject to the terms of the Mozilla Public
       2             :  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
       3             :  * You can obtain one at http://mozilla.org/MPL/2.0/. */
       4             : 
       5             : #ifndef AUDIOOUTPUTOBSERVER_H_
       6             : #define AUDIOOUTPUTOBSERVER_H_
       7             : 
       8             : #include "mozilla/StaticPtr.h"
       9             : #include "nsAutoPtr.h"
      10             : #include "AudioMixer.h"
      11             : 
      12             : namespace webrtc {
      13             : class SingleRwFifo;
      14             : }
      15             : 
      16             : namespace mozilla {
      17             : 
      18             : typedef struct FarEndAudioChunk_ {
      19             :   uint16_t mSamples;
      20             :   bool mOverrun;
      21             :   int16_t mData[1]; // variable-length
      22             : } FarEndAudioChunk;
      23             : 
      24             : // This class is used to packetize and send the mixed audio from an MSG, in
      25             : // int16, to the AEC module of WebRTC.org.
      26             : class AudioOutputObserver
      27             : {
      28             : public:
      29             :   AudioOutputObserver();
      30             : 
      31           0 :   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(AudioOutputObserver);
      32             : 
      33             :   void Clear();
      34             :   void InsertFarEnd(const AudioDataValue *aBuffer, uint32_t aFrames, bool aOverran,
      35             :                     int aFreq, int aChannels);
      36           0 :   uint32_t PlayoutFrequency() { return mPlayoutFreq; }
      37           0 :   uint32_t PlayoutChannels() { return mPlayoutChannels; }
      38             : 
      39             :   FarEndAudioChunk *Pop();
      40             :   uint32_t Size();
      41             : 
      42             : private:
      43             :   virtual ~AudioOutputObserver();
      44             :   uint32_t mPlayoutFreq;
      45             :   uint32_t mPlayoutChannels;
      46             : 
      47             :   nsAutoPtr<webrtc::SingleRwFifo> mPlayoutFifo;
      48             :   uint32_t mChunkSize;
      49             : 
      50             :   // chunking to 10ms support
      51             :   FarEndAudioChunk *mSaved; // can't be nsAutoPtr since we need to use free(), not delete
      52             :   uint32_t mSamplesSaved;
      53             : };
      54             : 
      55             : extern StaticRefPtr<AudioOutputObserver> gFarendObserver;
      56             : 
      57             : }
      58             : 
      59             : #endif