/*
* Copyright (C) 2011 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
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*/
#ifndef MultiChannelResampler_h
#define MultiChannelResampler_h
#include "platform/audio/SincResampler.h"
#include "wtf/Noncopyable.h"
#include "wtf/OwnPtr.h"
namespace WebCore {
class AudioBus;
class PLATFORM_EXPORT MultiChannelResampler {
WTF_MAKE_NONCOPYABLE(MultiChannelResampler);
public:
MultiChannelResampler(double scaleFactor, unsigned numberOfChannels);
// Process given AudioSourceProvider for streaming applications.
void process(AudioSourceProvider*, AudioBus* destination, size_t framesToProcess);
private:
// FIXME: the mac port can have a more highly optimized implementation based on CoreAudio
// instead of SincResampler. For now the default implementation will be used on all ports.
// https://bugs.webkit.org/show_bug.cgi?id=75118
// Each channel will be resampled using a high-quality SincResampler.
Vector<OwnPtr<SincResampler> > m_kernels;
unsigned m_numberOfChannels;
};
} // namespace WebCore
#endif // MultiChannelResampler_h