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/*
* 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:
*
* * Redistributions of source code must retain the above copyright
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* * 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
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* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef AudioDSPKernelProcessor_h
#define AudioDSPKernelProcessor_h
#include "AudioBus.h"
#include "AudioProcessor.h"
#include <wtf/Vector.h>
namespace WebCore {
class AudioBus;
class AudioDSPKernel;
class AudioProcessor;
// AudioDSPKernelProcessor processes one input -> one output (N channels each)
// It uses one AudioDSPKernel object per channel to do the processing, thus there is no cross-channel processing.
// Despite this limitation it turns out to be a very common and useful type of processor.
class AudioDSPKernelProcessor : public AudioProcessor {
public:
// numberOfChannels may be later changed if object is not yet in an "initialized" state
AudioDSPKernelProcessor(float sampleRate, unsigned numberOfChannels);
// Subclasses create the appropriate type of processing kernel here.
// We'll call this to create a kernel for each channel.
virtual std::unique_ptr<AudioDSPKernel> createKernel() = 0;
// AudioProcessor methods
void initialize() override;
void uninitialize() override;
void process(const AudioBus* source, AudioBus* destination, size_t framesToProcess) override;
void reset() override;
void setNumberOfChannels(unsigned) override;
unsigned numberOfChannels() const override { return m_numberOfChannels; }
double tailTime() const override;
double latencyTime() const override;
protected:
Vector<std::unique_ptr<AudioDSPKernel>> m_kernels;
bool m_hasJustReset;
};
} // namespace WebCore
#endif // AudioDSPKernelProcessor_h