/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef AudioBuffer_h
#define AudioBuffer_h
#include "bindings/v8/ScriptWrappable.h"
#include "wtf/Float32Array.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
namespace WebCore {
class AudioBus;
class ExceptionState;
class AudioBuffer : public ScriptWrappable, public RefCounted<AudioBuffer> {
public:
static PassRefPtr<AudioBuffer> create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
// Returns 0 if data is not a valid audio file.
static PassRefPtr<AudioBuffer> createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate);
// Format
size_t length() const { return m_length; }
double duration() const { return length() / static_cast<double>(sampleRate()); }
float sampleRate() const { return m_sampleRate; }
// Channel data access
unsigned numberOfChannels() const { return m_channels.size(); }
PassRefPtr<Float32Array> getChannelData(unsigned channelIndex, ExceptionState&);
Float32Array* getChannelData(unsigned channelIndex);
void zero();
// Scalar gain
double gain() const { return m_gain; }
void setGain(double gain) { m_gain = gain; }
static float minAllowedSampleRate();
static float maxAllowedSampleRate();
protected:
AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
explicit AudioBuffer(AudioBus*);
bool createdSuccessfully(unsigned desiredNumberOfChannels) const;
double m_gain; // scalar gain
float m_sampleRate;
size_t m_length;
Vector<RefPtr<Float32Array> > m_channels;
};
} // namespace WebCore
#endif // AudioBuffer_h