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/*
* 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
* 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_MULTI_CHANNEL_RESAMPLER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_MULTI_CHANNEL_RESAMPLER_H_
#include <memory>
#include "third_party/blink/renderer/platform/audio/sinc_resampler.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/noncopyable.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class AudioBus;
class PLATFORM_EXPORT MultiChannelResampler {
USING_FAST_MALLOC(MultiChannelResampler);
WTF_MAKE_NONCOPYABLE(MultiChannelResampler);
public:
MultiChannelResampler(double scale_factor, unsigned number_of_channels);
// Process given AudioSourceProvider for streaming applications.
void Process(AudioSourceProvider*,
AudioBus* destination,
uint32_t frames_to_process);
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<std::unique_ptr<SincResampler>> kernels_;
unsigned number_of_channels_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_MULTI_CHANNEL_RESAMPLER_H_
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