130 lines
4.6 KiB
C++
130 lines
4.6 KiB
C++
/*************************************************************************/
|
|
/* audio_effect_pitch_shift.h */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#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;
|
|
|
|
int fft_size;
|
|
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)
|
|
public:
|
|
enum FFT_Size {
|
|
FFT_SIZE_256,
|
|
FFT_SIZE_512,
|
|
FFT_SIZE_1024,
|
|
FFT_SIZE_2048,
|
|
FFT_SIZE_4096,
|
|
FFT_SIZE_MAX
|
|
};
|
|
|
|
public:
|
|
friend class AudioEffectPitchShiftInstance;
|
|
|
|
float pitch_scale;
|
|
int oversampling;
|
|
FFT_Size fft_size;
|
|
float wet;
|
|
float dry;
|
|
bool filter;
|
|
|
|
protected:
|
|
static void _bind_methods();
|
|
|
|
public:
|
|
Ref<AudioEffectInstance> instance();
|
|
|
|
void set_pitch_scale(float p_pitch_scale);
|
|
float get_pitch_scale() const;
|
|
|
|
void set_oversampling(int p_oversampling);
|
|
int get_oversampling() const;
|
|
|
|
void set_fft_size(FFT_Size);
|
|
FFT_Size get_fft_size() const;
|
|
|
|
AudioEffectPitchShift();
|
|
};
|
|
|
|
VARIANT_ENUM_CAST(AudioEffectPitchShift::FFT_Size);
|
|
|
|
#endif // AUDIO_EFFECT_PITCH_SHIFT_H
|