1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef MEDIA_BASE_FAKE_AUDIO_RENDERER_SINK_H_
6#define MEDIA_BASE_FAKE_AUDIO_RENDERER_SINK_H_
7
8#include "media/audio/audio_parameters.h"
9#include "media/base/audio_renderer_sink.h"
10
11namespace media {
12
13class FakeAudioRendererSink : public AudioRendererSink {
14 public:
15  enum State {
16    kUninitialized,
17    kInitialized,
18    kStarted,
19    kPaused,
20    kPlaying,
21    kStopped
22  };
23
24  FakeAudioRendererSink();
25
26  virtual void Initialize(const AudioParameters& params,
27                          RenderCallback* callback) OVERRIDE;
28  virtual void Start() OVERRIDE;
29  virtual void Stop() OVERRIDE;
30  virtual void Pause() OVERRIDE;
31  virtual void Play() OVERRIDE;
32  virtual bool SetVolume(double volume) OVERRIDE;
33
34  // Attempts to call Render() on the callback provided to
35  // Initialize() with |dest| and |audio_delay_milliseconds|.
36  // Returns true and sets |frames_written| to the return value of the
37  // Render() call.
38  // Returns false if this object is in a state where calling Render()
39  // should not occur. (i.e., in the kPaused or kStopped state.) The
40  // value of |frames_written| is undefined if false is returned.
41  bool Render(AudioBus* dest, int audio_delay_milliseconds,
42              int* frames_written);
43  void OnRenderError();
44
45  State state() const { return state_; }
46
47 protected:
48  virtual ~FakeAudioRendererSink();
49
50 private:
51  void ChangeState(State new_state);
52
53  State state_;
54  RenderCallback* callback_;
55
56  DISALLOW_COPY_AND_ASSIGN(FakeAudioRendererSink);
57};
58
59}  // namespace media
60
61#endif  // MEDIA_BASE_FAKE_AUDIO_RENDERER_SINK_H_
62