blob: c1e1ba54ca1de67eec13d5e921d70b454ef794c8 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// A fake implementation of AudioInputStream, useful for testing purpose.
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "base/threading/thread.h"
#include "base/time.h"
#include "media/audio/audio_io.h"
#include "media/audio/audio_parameters.h"
namespace media {
class AudioManagerBase;
class MEDIA_EXPORT FakeAudioInputStream
: public AudioInputStream {
static AudioInputStream* MakeFakeStream(AudioManagerBase* manager,
const AudioParameters& params);
virtual bool Open() OVERRIDE;
virtual void Start(AudioInputCallback* callback) OVERRIDE;
virtual void Stop() OVERRIDE;
virtual void Close() OVERRIDE;
virtual double GetMaxVolume() OVERRIDE;
virtual void SetVolume(double volume) OVERRIDE;
virtual double GetVolume() OVERRIDE;
virtual void SetAutomaticGainControl(bool enabled) OVERRIDE;
virtual bool GetAutomaticGainControl() OVERRIDE;
// Generate one beep sound. This method is called by
// FakeVideoCaptureDevice to test audio/video synchronization.
// This is a static method because FakeVideoCaptureDevice is
// disconnected from an audio device. This means only one instance of
// this class gets to respond, which is okay because we assume there's
// only one stream for this testing purpose.
// TODO(hclam): Make this non-static. To do this we'll need to fix
// such that video capture device is aware of audio
// input stream.
static void BeepOnce();
FakeAudioInputStream(AudioManagerBase* manager,
const AudioParameters& params);
virtual ~FakeAudioInputStream();
void DoCallback();
AudioManagerBase* audio_manager_;
AudioInputCallback* callback_;
scoped_array<uint8> buffer_;
int buffer_size_;
AudioParameters params_;
base::Thread thread_;
base::Time last_callback_time_;
base::TimeDelta callback_interval_;
int beep_duration_in_buffers_;
int beep_generated_in_buffers_;
int beep_period_in_frames_;
int frames_elapsed_;
} // namespace media