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#ifndef AudioDSPKernel_h
#define AudioDSPKernel_h

#include "AudioDSPKernelProcessor.h"

namespace WebCore {

// AudioDSPKernel does the processing for one channel of an AudioDSPKernelProcessor.

class AudioDSPKernel {
public:
    AudioDSPKernel(AudioDSPKernelProcessor* kernelProcessor)
        : m_kernelProcessor(kernelProcessor)
        , m_sampleRate(kernelProcessor->sampleRate())
    {
    }

    AudioDSPKernel(double sampleRate)
        : m_kernelProcessor(0)
        , m_sampleRate(sampleRate)
    {
    }

    virtual ~AudioDSPKernel() { };

    // Subclasses must override process() to do the processing and reset() to reset DSP state.
    virtual void process(const float* source, float* destination, size_t framesToProcess) = 0;
    virtual void reset() = 0;

    double sampleRate() const { return m_sampleRate; }
    double nyquist() const { return 0.5 * sampleRate(); }

    AudioDSPKernelProcessor* processor() { return m_kernelProcessor; }
    const AudioDSPKernelProcessor* processor() const { return m_kernelProcessor; }

protected:
    AudioDSPKernelProcessor* m_kernelProcessor;
    double m_sampleRate;
};

} // namespace WebCore

#endif // AudioDSPKernel_h