/*************************************************************************/ /* audio_effect_pitch_shift.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2022 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: friend class AudioEffectPitchShiftInstance; enum FFT_Size { FFT_SIZE_256, FFT_SIZE_512, FFT_SIZE_1024, FFT_SIZE_2048, FFT_SIZE_4096, FFT_SIZE_MAX }; 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