d95794ec8a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
/**************************************************************************/
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/* audio_effect_pitch_shift.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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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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int fft_size;
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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) override;
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};
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class AudioEffectPitchShift : public AudioEffect {
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GDCLASS(AudioEffectPitchShift, AudioEffect);
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public:
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friend class AudioEffectPitchShiftInstance;
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enum FFTSize {
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FFT_SIZE_256,
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FFT_SIZE_512,
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FFT_SIZE_1024,
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FFT_SIZE_2048,
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FFT_SIZE_4096,
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FFT_SIZE_MAX
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};
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float pitch_scale;
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int oversampling;
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FFTSize fft_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> instantiate() override;
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void set_pitch_scale(float p_pitch_scale);
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float get_pitch_scale() const;
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void set_oversampling(int p_oversampling);
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int get_oversampling() const;
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void set_fft_size(FFTSize);
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FFTSize get_fft_size() const;
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AudioEffectPitchShift();
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};
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VARIANT_ENUM_CAST(AudioEffectPitchShift::FFTSize);
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#endif // AUDIO_EFFECT_PITCH_SHIFT_H
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