michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef AUDIOOUTPUTOBSERVER_H_
michael@0: #define AUDIOOUTPUTOBSERVER_H_
michael@0: 
michael@0: #include "mozilla/StaticPtr.h"
michael@0: 
michael@0: namespace webrtc {
michael@0: class SingleRwFifo;
michael@0: }
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: typedef struct FarEndAudioChunk_ {
michael@0:   uint16_t mSamples;
michael@0:   bool mOverrun;
michael@0:   int16_t mData[1]; // variable-length
michael@0: } FarEndAudioChunk;
michael@0: 
michael@0: // XXX Really a singleton currently
michael@0: class AudioOutputObserver // : public MSGOutputObserver
michael@0: {
michael@0: public:
michael@0:   AudioOutputObserver();
michael@0:   virtual ~AudioOutputObserver();
michael@0: 
michael@0:   void Clear();
michael@0:   void InsertFarEnd(const AudioDataValue *aBuffer, uint32_t aSamples, bool aOverran,
michael@0:                     int aFreq, int aChannels, AudioSampleFormat aFormat);
michael@0:   uint32_t PlayoutFrequency() { return mPlayoutFreq; }
michael@0:   uint32_t PlayoutChannels() { return mPlayoutChannels; }
michael@0: 
michael@0:   FarEndAudioChunk *Pop();
michael@0:   uint32_t Size();
michael@0: 
michael@0: private:
michael@0:   uint32_t mPlayoutFreq;
michael@0:   uint32_t mPlayoutChannels;
michael@0: 
michael@0:   nsAutoPtr<webrtc::SingleRwFifo> mPlayoutFifo;
michael@0:   uint32_t mChunkSize;
michael@0: 
michael@0:   // chunking to 10ms support
michael@0:   nsAutoPtr<FarEndAudioChunk> mSaved;
michael@0:   uint32_t mSamplesSaved;
michael@0: };
michael@0: 
michael@0: // XXX until there's a registration API in MSG
michael@0: extern StaticAutoPtr<AudioOutputObserver> gFarendObserver;
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif