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#ifndef AUDIO_EFFECT_PITCH_SHIFT_H
#define AUDIO_EFFECT_PITCH_SHIFT_H
#include "servers/audio/audio_effect.h"
class SMBPitchShift {
enum {
MAX_FRAME_LENGTH=8192
};
float gInFIFO[MAX_FRAME_LENGTH];
float gOutFIFO[MAX_FRAME_LENGTH];
float gFFTworksp[2*MAX_FRAME_LENGTH];
float gLastPhase[MAX_FRAME_LENGTH/2+1];
float gSumPhase[MAX_FRAME_LENGTH/2+1];
float gOutputAccum[2*MAX_FRAME_LENGTH];
float gAnaFreq[MAX_FRAME_LENGTH];
float gAnaMagn[MAX_FRAME_LENGTH];
float gSynFreq[MAX_FRAME_LENGTH];
float gSynMagn[MAX_FRAME_LENGTH];
long gRover;
void smbFft(float *fftBuffer, long fftFrameSize, long sign);
public:
void PitchShift(float pitchShift, long numSampsToProcess, long fftFrameSize, long osamp, float sampleRate, float *indata, float *outdata, int stride);
SMBPitchShift() {
gRover=0;
memset(gInFIFO, 0, MAX_FRAME_LENGTH*sizeof(float));
memset(gOutFIFO, 0, MAX_FRAME_LENGTH*sizeof(float));
memset(gFFTworksp, 0, 2*MAX_FRAME_LENGTH*sizeof(float));
memset(gLastPhase, 0, (MAX_FRAME_LENGTH/2+1)*sizeof(float));
memset(gSumPhase, 0, (MAX_FRAME_LENGTH/2+1)*sizeof(float));
memset(gOutputAccum, 0, 2*MAX_FRAME_LENGTH*sizeof(float));
memset(gAnaFreq, 0, MAX_FRAME_LENGTH*sizeof(float));
memset(gAnaMagn, 0, MAX_FRAME_LENGTH*sizeof(float));
}
};
class AudioEffectPitchShift;
class AudioEffectPitchShiftInstance : public AudioEffectInstance {
GDCLASS(AudioEffectPitchShiftInstance,AudioEffectInstance)
friend class AudioEffectPitchShift;
Ref<AudioEffectPitchShift> base;
SMBPitchShift shift_l;
SMBPitchShift shift_r;
public:
virtual void process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count);
};
class AudioEffectPitchShift : public AudioEffect {
GDCLASS(AudioEffectPitchShift,AudioEffect)
friend class AudioEffectPitchShiftInstance;
float pitch_scale;
int window_size;
float wet;
float dry;
bool filter;
protected:
static void _bind_methods();
public:
Ref<AudioEffectInstance> instance();
void set_pitch_scale(float p_adjust);
float get_pitch_scale() const;
AudioEffectPitchShift();
};
#endif // AUDIO_EFFECT_PITCH_SHIFT_H
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