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/memory/scoped_ptr.h"
13 #include "base/synchronization/lock.h"
14 #include "base/threading/thread.h"
15 #include "base/time/time.h"
16 #include "media/audio/audio_io.h"
17 #include "media/audio/audio_parameters.h"
21 class AudioManagerBase;
23 class MEDIA_EXPORT FakeAudioInputStream
24 : public AudioInputStream {
26 static AudioInputStream* MakeFakeStream(AudioManagerBase* manager,
27 const AudioParameters& params);
29 virtual bool Open() OVERRIDE;
30 virtual void Start(AudioInputCallback* callback) OVERRIDE;
31 virtual void Stop() OVERRIDE;
32 virtual void Close() OVERRIDE;
33 virtual double GetMaxVolume() OVERRIDE;
34 virtual void SetVolume(double volume) OVERRIDE;
35 virtual double GetVolume() OVERRIDE;
36 virtual void SetAutomaticGainControl(bool enabled) OVERRIDE;
37 virtual bool GetAutomaticGainControl() OVERRIDE;
39 // Generate one beep sound. This method is called by
40 // FakeVideoCaptureDevice to test audio/video synchronization.
41 // This is a static method because FakeVideoCaptureDevice is
42 // disconnected from an audio device. This means only one instance of
43 // this class gets to respond, which is okay because we assume there's
44 // only one stream for this testing purpose.
45 // TODO(hclam): Make this non-static. To do this we'll need to fix
46 // crbug.com/159053 such that video capture device is aware of audio
48 static void BeepOnce();
51 FakeAudioInputStream(AudioManagerBase* manager,
52 const AudioParameters& params);
54 virtual ~FakeAudioInputStream();
58 AudioManagerBase* audio_manager_;
59 AudioInputCallback* callback_;
60 scoped_ptr<uint8[]> buffer_;
62 AudioParameters params_;
64 base::TimeTicks last_callback_time_;
65 base::TimeDelta callback_interval_;
66 int beep_duration_in_buffers_;
67 int beep_generated_in_buffers_;
68 int beep_period_in_frames_;
71 DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream);
76 #endif // MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_