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#ifndef AudioDSPKernelProcessor_h
#define AudioDSPKernelProcessor_h
#include "platform/audio/AudioBus.h"
#include "platform/audio/AudioProcessor.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/ThreadingPrimitives.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 PLATFORM_EXPORT 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 PassOwnPtr<AudioDSPKernel> createKernel() = 0;
// AudioProcessor methods
virtual void initialize() OVERRIDE;
virtual void uninitialize() OVERRIDE;
virtual void process(const AudioBus* source, AudioBus* destination, size_t framesToProcess) OVERRIDE;
virtual void reset() OVERRIDE;
virtual void setNumberOfChannels(unsigned) OVERRIDE;
virtual unsigned numberOfChannels() const OVERRIDE { return m_numberOfChannels; }
virtual double tailTime() const OVERRIDE;
virtual double latencyTime() const OVERRIDE;
protected:
Vector<OwnPtr<AudioDSPKernel> > m_kernels;
mutable Mutex m_processLock;
bool m_hasJustReset;
};
} // namespace WebCore
#endif // AudioDSPKernelProcessor_h