dom/media/AudioCaptureTrack.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   4  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef MOZILLA_AUDIOCAPTURETRACK_H_
   7 #define MOZILLA_AUDIOCAPTURETRACK_H_
   8
   9 #include "MediaTrackGraph.h"
  10 #include "AudioMixer.h"
  11 #include <algorithm>
  12
  13 namespace mozilla {
  14
  15 class AbstractThread;
  16 class DOMMediaStream;
  17
  18 /**
  19  * See MediaTrackGraph::CreateAudioCaptureTrack.
  20  */
  21 class AudioCaptureTrack : public ProcessedMediaTrack,
  22                           public MixerCallbackReceiver {
  23  public:
  24   explicit AudioCaptureTrack(TrackRate aRate);
  25   virtual ~AudioCaptureTrack();
  26
  27   void Start();
  28
  29   void ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags) override;
  30
  31   uint32_t NumberOfChannels() const override;
  32
  33  protected:
  34   void MixerCallback(AudioDataValue* aMixedBuffer, AudioSampleFormat aFormat,
  35                      uint32_t aChannels, uint32_t aFrames,
  36                      uint32_t aSampleRate) override;
  37   AudioMixer mMixer;
  38   bool mStarted;
  39   bool mTrackCreated;
  40 };
  41 }  // namespace mozilla
  42
  43 #endif /* MOZILLA_AUDIOCAPTURETRACK_H_ */