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