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// Copyright (c) 2006-2008 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.
#include <windows.h>
#include "base/basictypes.h"
#include "media/audio/audio_output.h"
// A do-nothing audio stream. It behaves like a regular audio stream but does
// not have any side effect, except possibly the creation and tear-down of
// of a thread. It is useful to test code that uses audio streams such as
// audio sources.
class AudioOutputStreamWinMock : public AudioOutputStream {
public:
AudioOutputStreamWinMock()
: callback_(NULL),
buffer_(NULL),
packet_size_(0),
left_volume_(0.0),
right_volume_(0.0) {
}
virtual bool Open(size_t packet_size) {
if (packet_size < sizeof(int16))
return false;
packet_size_ = packet_size;
buffer_ = new char[packet_size_];
return true;
}
virtual void Start(AudioSourceCallback* callback) {
callback_ = callback;
callback_->OnMoreData(this, buffer_, packet_size_);
}
// TODO(cpu): flesh out Start and Stop methods. We need a thread to
// perform periodic callbacks.
virtual void Stop() {
}
virtual void SetVolume(double left_level, double right_level) {
left_volume_ = left_level;
right_volume_ = right_level;
}
virtual void GetVolume(double* left_level, double* right_level) {
*left_level = left_volume_;
*right_level = right_volume_;
}
virtual void Close() {
callback_->OnClose(this);
callback_ = NULL;
delete this;
}
protected:
virtual ~AudioOutputStreamWinMock() {
delete[] buffer_;
packet_size_ = 0;
}
private:
AudioSourceCallback* callback_;
char* buffer_;
size_t packet_size_;
double left_volume_;
double right_volume_;
};
class AudioManagerWin : public AudioManager {
public:
virtual AudioOutputStream* MakeAudioStream(Format format, int channels,
int sample_rate,
char bits_per_sample) {
if (format == AUDIO_MOCK)
return new AudioOutputStreamWinMock();
return NULL;
}
virtual void MuteAll() {
}
virtual void UnMuteAll() {
}
protected:
virtual ~AudioManagerWin() {
}
};
// TODO(cpu): Decide how to manage the lifetime of the AudioManager singleton.
// Right now we are leaking it.
AudioManager* GetAudioManager() {
static AudioManagerWin* audio_manager = NULL;
if (!audio_manager)
audio_manager = new AudioManagerWin();
return audio_manager;
}
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