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#ifndef ENGINEBUFFERSCALEST_H
#define ENGINEBUFFERSCALEST_H
#include "engine/enginebufferscale.h"
#include "util/memory.h"
class ReadAheadManager;
namespace soundtouch {
class SoundTouch;
} // namespace soundtouch
// Uses libsoundtouch to scale audio.
class EngineBufferScaleST : public EngineBufferScale {
Q_OBJECT
public:
explicit EngineBufferScaleST(
ReadAheadManager* pReadAheadManager);
~EngineBufferScaleST() override;
void setScaleParameters(double base_rate,
double* pTempoRatio,
double* pPitchRatio) override;
void setSampleRate(SINT iSampleRate) override;
// Scale buffer.
double scaleBuffer(
CSAMPLE* pOutputBuffer,
SINT iOutputBufferSize) override;
// Flush buffer.
void clear() override;
private:
// The read-ahead manager that we use to fetch samples
ReadAheadManager* m_pReadAheadManager;
// SoundTouch time/pitch scaling lib
std::unique_ptr<soundtouch::SoundTouch> m_pSoundTouch;
// Temporary buffer for reading from the RAMAN.
SINT buffer_back_size;
CSAMPLE* buffer_back;
// Holds the playback direction.
bool m_bBackwards;
};
#endif
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