1 // Copyright (c) 2012 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.
5 // A fake implementation of AudioInputStream, useful for testing purpose.
7 #ifndef MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
8 #define MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
12 #include "base/files/file_path.h"
13 #include "base/memory/scoped_ptr.h"
14 #include "base/synchronization/lock.h"
15 #include "base/threading/thread.h"
16 #include "base/time/time.h"
17 #include "media/audio/audio_io.h"
18 #include "media/audio/audio_parameters.h"
19 #include "media/audio/sounds/wav_audio_handler.h"
24 class AudioManagerBase
;
26 // This class can either generate a beep sound or play audio from a file.
27 class MEDIA_EXPORT FakeAudioInputStream
28 : public AudioInputStream
{
30 static AudioInputStream
* MakeFakeStream(
31 AudioManagerBase
* manager
, const AudioParameters
& params
);
34 void Start(AudioInputCallback
* callback
) override
;
36 void Close() override
;
37 double GetMaxVolume() override
;
38 void SetVolume(double volume
) override
;
39 double GetVolume() override
;
40 bool IsMuted() override
;
41 void SetAutomaticGainControl(bool enabled
) override
;
42 bool GetAutomaticGainControl() override
;
44 // Generate one beep sound. This method is called by
45 // FakeVideoCaptureDevice to test audio/video synchronization.
46 // This is a static method because FakeVideoCaptureDevice is
47 // disconnected from an audio device. This means only one instance of
48 // this class gets to respond, which is okay because we assume there's
49 // only one stream for this testing purpose.
50 // TODO(hclam): Make this non-static. To do this we'll need to fix
51 // crbug.com/159053 such that video capture device is aware of audio
53 static void BeepOnce();
56 FakeAudioInputStream(AudioManagerBase
* manager
,
57 const AudioParameters
& params
);
58 ~FakeAudioInputStream() override
;
62 // Opens this stream reading from a |wav_filename| rather than beeping.
63 void OpenInFileMode(const base::FilePath
& wav_filename
);
65 // Returns true if the device is playing from a file; false if we're beeping.
66 bool PlayingFromFile();
68 void PlayFileLooping();
71 AudioManagerBase
* audio_manager_
;
72 AudioInputCallback
* callback_
;
73 scoped_ptr
<uint8
[]> buffer_
;
75 AudioParameters params_
;
76 const scoped_refptr
<base::SingleThreadTaskRunner
> task_runner_
;
77 base::TimeTicks last_callback_time_
;
78 base::TimeDelta callback_interval_
;
79 base::TimeDelta interval_from_last_beep_
;
80 int beep_duration_in_buffers_
;
81 int beep_generated_in_buffers_
;
82 int beep_period_in_frames_
;
83 scoped_ptr
<media::AudioBus
> audio_bus_
;
84 scoped_ptr
<uint8
[]> wav_file_data_
;
85 scoped_ptr
<media::WavAudioHandler
> wav_audio_handler_
;
86 int wav_file_read_pos_
;
88 // Allows us to run tasks on the FakeAudioInputStream instance which are
89 // bound by its lifetime.
90 base::WeakPtrFactory
<FakeAudioInputStream
> weak_factory_
;
92 DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream
);
97 #endif // MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_