1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59


media / audio / fake_audio_output_stream.h [blame]

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_
#define MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_

#include <memory>

#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "media/audio/android/muteable_audio_output_stream.h"
#include "media/audio/audio_io.h"
#include "media/base/audio_parameters.h"
#include "media/base/fake_audio_worker.h"

namespace media {

class AudioManagerBase;

// A fake implementation of AudioOutputStream.  Used for testing and when a real
// audio output device is unavailable or refusing output (e.g. remote desktop).
// Callbacks are driven on the AudioManager's message loop.
class MEDIA_EXPORT FakeAudioOutputStream : public MuteableAudioOutputStream {
 public:
  static AudioOutputStream* MakeFakeStream(AudioManagerBase* manager,
                                           const AudioParameters& params);

  FakeAudioOutputStream(const FakeAudioOutputStream&) = delete;
  FakeAudioOutputStream& operator=(const FakeAudioOutputStream&) = delete;

  // AudioOutputStream implementation.
  bool Open() override;
  void Start(AudioSourceCallback* callback) override;
  void Stop() override;
  void SetVolume(double volume) override;
  void GetVolume(double* volume) override;
  void Close() override;
  void Flush() override;
  void SetMute(bool muted) override;

 private:
  FakeAudioOutputStream(AudioManagerBase* manager,
                        const AudioParameters& params);
  ~FakeAudioOutputStream() override;

  // Task that periodically calls OnMoreData() to consume audio data.
  void CallOnMoreData(base::TimeTicks ideal_time, base::TimeTicks now);

  const raw_ptr<AudioManagerBase> audio_manager_;
  const base::TimeDelta fixed_data_delay_;
  raw_ptr<AudioSourceCallback> callback_;
  FakeAudioWorker fake_worker_;
  const std::unique_ptr<AudioBus> audio_bus_;
};

}  // namespace media

#endif  // MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_