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-rw-r--r--Alc/effects/vmorpher.cpp430
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diff --git a/Alc/effects/vmorpher.cpp b/Alc/effects/vmorpher.cpp
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-/**
- * OpenAL cross platform audio library
- * Copyright (C) 2019 by Anis A. Hireche
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- * Or go to http://www.gnu.org/copyleft/lgpl.html
- */
-
-#include "config.h"
-
-#include <cmath>
-#include <cstdlib>
-#include <algorithm>
-#include <functional>
-
-#include "alcmain.h"
-#include "alcontext.h"
-#include "alAuxEffectSlot.h"
-#include "alError.h"
-#include "alu.h"
-
-namespace {
-
-#define MAX_UPDATE_SAMPLES 128
-#define NUM_FORMANTS 4
-#define NUM_FILTERS 2
-#define Q_FACTOR 5.0f
-
-#define VOWEL_A_INDEX 0
-#define VOWEL_B_INDEX 1
-
-#define WAVEFORM_FRACBITS 24
-#define WAVEFORM_FRACONE (1<<WAVEFORM_FRACBITS)
-#define WAVEFORM_FRACMASK (WAVEFORM_FRACONE-1)
-
-inline ALfloat Sin(ALsizei index)
-{
- constexpr ALfloat scale{al::MathDefs<float>::Tau() / ALfloat{WAVEFORM_FRACONE}};
- return std::sin(static_cast<ALfloat>(index) * scale)*0.5f + 0.5f;
-}
-
-inline ALfloat Saw(ALsizei index)
-{
- return static_cast<ALfloat>(index) / ALfloat{WAVEFORM_FRACONE};
-}
-
-inline ALfloat Triangle(ALsizei index)
-{
- return std::fabs(static_cast<ALfloat>(index)*(2.0f/WAVEFORM_FRACONE) - 1.0f);
-}
-
-inline ALfloat Half(ALsizei)
-{
- return 0.5f;
-}
-
-template<ALfloat func(ALsizei)>
-void Oscillate(ALfloat *RESTRICT dst, ALsizei index, const ALsizei step, ALsizei todo)
-{
- for(ALsizei i{0};i < todo;i++)
- {
- index += step;
- index &= WAVEFORM_FRACMASK;
- dst[i] = func(index);
- }
-}
-
-struct FormantFilter
-{
- ALfloat f0norm{0.0f};
- ALfloat fGain{1.0f};
- ALfloat s1{0.0f};
- ALfloat s2{0.0f};
-
- FormantFilter() = default;
- FormantFilter(ALfloat f0norm_, ALfloat gain) : f0norm{f0norm_}, fGain{gain} { }
-
- inline void process(const ALfloat* samplesIn, ALfloat* samplesOut, const ALsizei numInput)
- {
- /* A state variable filter from a topology-preserving transform.
- * Based on a talk given by Ivan Cohen: https://www.youtube.com/watch?v=esjHXGPyrhg
- */
- const ALfloat g = std::tan(al::MathDefs<float>::Pi() * f0norm);
- const ALfloat h = 1.0f / (1 + (g / Q_FACTOR) + (g * g));
-
- for (ALsizei i{0};i < numInput;i++)
- {
- const ALfloat H = h * (samplesIn[i] - (1.0f / Q_FACTOR + g) * s1 - s2);
- const ALfloat B = g * H + s1;
- const ALfloat L = g * B + s2;
-
- s1 = g * H + B;
- s2 = g * B + L;
-
- // Apply peak and accumulate samples.
- samplesOut[i] += B * fGain;
- }
- }
-
- inline void clear()
- {
- s1 = 0.0f;
- s2 = 0.0f;
- }
-};
-
-
-struct VmorpherState final : public EffectState {
- struct {
- /* Effect parameters */
- FormantFilter Formants[NUM_FILTERS][NUM_FORMANTS];
-
- /* Effect gains for each channel */
- ALfloat CurrentGains[MAX_OUTPUT_CHANNELS]{};
- ALfloat TargetGains[MAX_OUTPUT_CHANNELS]{};
- } mChans[MAX_AMBI_CHANNELS];
-
- void (*mGetSamples)(ALfloat* RESTRICT, ALsizei, const ALsizei, ALsizei) {};
-
- ALsizei mIndex{0};
- ALsizei mStep{1};
-
- /* Effects buffers */
- ALfloat mSampleBufferA[MAX_UPDATE_SAMPLES]{};
- ALfloat mSampleBufferB[MAX_UPDATE_SAMPLES]{};
-
- ALboolean deviceUpdate(const ALCdevice *device) override;
- void update(const ALCcontext *context, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target) override;
- void process(const ALsizei samplesToDo, const FloatBufferLine *RESTRICT samplesIn, const ALsizei numInput, const al::span<FloatBufferLine> samplesOut) override;
-
- static std::array<FormantFilter,4> getFiltersByPhoneme(ALenum phoneme, ALfloat frequency, ALfloat pitch);
-
- DEF_NEWDEL(VmorpherState)
-};
-
-std::array<FormantFilter,4> VmorpherState::getFiltersByPhoneme(ALenum phoneme, ALfloat frequency, ALfloat pitch)
-{
- /* Using soprano formant set of values to
- * better match mid-range frequency space.
- *
- * See: https://www.classes.cs.uchicago.edu/archive/1999/spring/CS295/Computing_Resources/Csound/CsManual3.48b1.HTML/Appendices/table3.html
- */
- switch(phoneme)
- {
- case AL_VOCAL_MORPHER_PHONEME_A:
- return {{
- {( 800 * pitch) / frequency, 1.000000f}, /* std::pow(10.0f, 0 / 20.0f); */
- {(1150 * pitch) / frequency, 0.501187f}, /* std::pow(10.0f, -6 / 20.0f); */
- {(2900 * pitch) / frequency, 0.025118f}, /* std::pow(10.0f, -32 / 20.0f); */
- {(3900 * pitch) / frequency, 0.100000f} /* std::pow(10.0f, -20 / 20.0f); */
- }};
- case AL_VOCAL_MORPHER_PHONEME_E:
- return {{
- {( 350 * pitch) / frequency, 1.000000f}, /* std::pow(10.0f, 0 / 20.0f); */
- {(2000 * pitch) / frequency, 0.100000f}, /* std::pow(10.0f, -20 / 20.0f); */
- {(2800 * pitch) / frequency, 0.177827f}, /* std::pow(10.0f, -15 / 20.0f); */
- {(3600 * pitch) / frequency, 0.009999f} /* std::pow(10.0f, -40 / 20.0f); */
- }};
- case AL_VOCAL_MORPHER_PHONEME_I:
- return {{
- {( 270 * pitch) / frequency, 1.000000f}, /* std::pow(10.0f, 0 / 20.0f); */
- {(2140 * pitch) / frequency, 0.251188f}, /* std::pow(10.0f, -12 / 20.0f); */
- {(2950 * pitch) / frequency, 0.050118f}, /* std::pow(10.0f, -26 / 20.0f); */
- {(3900 * pitch) / frequency, 0.050118f} /* std::pow(10.0f, -26 / 20.0f); */
- }};
- case AL_VOCAL_MORPHER_PHONEME_O:
- return {{
- {( 450 * pitch) / frequency, 1.000000f}, /* std::pow(10.0f, 0 / 20.0f); */
- {( 800 * pitch) / frequency, 0.281838f}, /* std::pow(10.0f, -11 / 20.0f); */
- {(2830 * pitch) / frequency, 0.079432f}, /* std::pow(10.0f, -22 / 20.0f); */
- {(3800 * pitch) / frequency, 0.079432f} /* std::pow(10.0f, -22 / 20.0f); */
- }};
- case AL_VOCAL_MORPHER_PHONEME_U:
- return {{
- {( 325 * pitch) / frequency, 1.000000f}, /* std::pow(10.0f, 0 / 20.0f); */
- {( 700 * pitch) / frequency, 0.158489f}, /* std::pow(10.0f, -16 / 20.0f); */
- {(2700 * pitch) / frequency, 0.017782f}, /* std::pow(10.0f, -35 / 20.0f); */
- {(3800 * pitch) / frequency, 0.009999f} /* std::pow(10.0f, -40 / 20.0f); */
- }};
- }
- return {};
-}
-
-
-ALboolean VmorpherState::deviceUpdate(const ALCdevice* /*device*/)
-{
- for(auto &e : mChans)
- {
- std::for_each(std::begin(e.Formants[VOWEL_A_INDEX]), std::end(e.Formants[VOWEL_A_INDEX]),
- std::mem_fn(&FormantFilter::clear));
- std::for_each(std::begin(e.Formants[VOWEL_B_INDEX]), std::end(e.Formants[VOWEL_B_INDEX]),
- std::mem_fn(&FormantFilter::clear));
- std::fill(std::begin(e.CurrentGains), std::end(e.CurrentGains), 0.0f);
- }
-
- return AL_TRUE;
-}
-
-void VmorpherState::update(const ALCcontext *context, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target)
-{
- const ALCdevice *device{context->Device};
- const ALfloat frequency{static_cast<ALfloat>(device->Frequency)};
- const ALfloat step{props->Vmorpher.Rate / static_cast<ALfloat>(device->Frequency)};
- mStep = fastf2i(clampf(step*WAVEFORM_FRACONE, 0.0f, ALfloat{WAVEFORM_FRACONE-1}));
-
- if(mStep == 0)
- mGetSamples = Oscillate<Half>;
- else if(props->Vmorpher.Waveform == AL_VOCAL_MORPHER_WAVEFORM_SINUSOID)
- mGetSamples = Oscillate<Sin>;
- else if(props->Vmorpher.Waveform == AL_VOCAL_MORPHER_WAVEFORM_SAWTOOTH)
- mGetSamples = Oscillate<Saw>;
- else /*if(props->Vmorpher.Waveform == AL_VOCAL_MORPHER_WAVEFORM_TRIANGLE)*/
- mGetSamples = Oscillate<Triangle>;
-
- const ALfloat pitchA{fastf2i(std::pow(2.0f, props->Vmorpher.PhonemeACoarseTuning*100.0f / 2400.0f)*FRACTIONONE) * (1.0f/FRACTIONONE)};
- const ALfloat pitchB{fastf2i(std::pow(2.0f, props->Vmorpher.PhonemeBCoarseTuning*100.0f / 2400.0f)*FRACTIONONE) * (1.0f/FRACTIONONE)};
-
- auto vowelA = getFiltersByPhoneme(props->Vmorpher.PhonemeA, frequency, pitchA);
- auto vowelB = getFiltersByPhoneme(props->Vmorpher.PhonemeB, frequency, pitchB);
-
- /* Copy the filter coefficients to the input channels. */
- for(size_t i{0u};i < slot->Wet.Buffer.size();++i)
- {
- std::copy(vowelA.begin(), vowelA.end(), std::begin(mChans[i].Formants[VOWEL_A_INDEX]));
- std::copy(vowelB.begin(), vowelB.end(), std::begin(mChans[i].Formants[VOWEL_B_INDEX]));
- }
-
- mOutTarget = target.Main->Buffer;
- for(size_t i{0u};i < slot->Wet.Buffer.size();++i)
- {
- auto coeffs = GetAmbiIdentityRow(i);
- ComputePanGains(target.Main, coeffs.data(), slot->Params.Gain, mChans[i].TargetGains);
- }
-}
-
-void VmorpherState::process(const ALsizei samplesToDo, const FloatBufferLine *RESTRICT samplesIn, const ALsizei numInput, const al::span<FloatBufferLine> samplesOut)
-{
- /* Following the EFX specification for a conformant implementation which describes
- * the effect as a pair of 4-band formant filters blended together using an LFO.
- */
- for(ALsizei base{0};base < samplesToDo;)
- {
- alignas(16) ALfloat lfo[MAX_UPDATE_SAMPLES];
- const ALsizei td = mini(MAX_UPDATE_SAMPLES, samplesToDo-base);
-
- mGetSamples(lfo, mIndex, mStep, td);
- mIndex += (mStep * td) & WAVEFORM_FRACMASK;
- mIndex &= WAVEFORM_FRACMASK;
-
- ASSUME(numInput > 0);
- for(ALsizei c{0};c < numInput;c++)
- {
- for (ALsizei i{0};i < td;i++)
- {
- mSampleBufferA[i] = 0.0f;
- mSampleBufferB[i] = 0.0f;
- }
-
- auto& vowelA = mChans[c].Formants[VOWEL_A_INDEX];
- auto& vowelB = mChans[c].Formants[VOWEL_B_INDEX];
-
- /* Process first vowel. */
- vowelA[0].process(&samplesIn[c][base], mSampleBufferA, td);
- vowelA[1].process(&samplesIn[c][base], mSampleBufferA, td);
- vowelA[2].process(&samplesIn[c][base], mSampleBufferA, td);
- vowelA[3].process(&samplesIn[c][base], mSampleBufferA, td);
-
- /* Process second vowel. */
- vowelB[0].process(&samplesIn[c][base], mSampleBufferB, td);
- vowelB[1].process(&samplesIn[c][base], mSampleBufferB, td);
- vowelB[2].process(&samplesIn[c][base], mSampleBufferB, td);
- vowelB[3].process(&samplesIn[c][base], mSampleBufferB, td);
-
- alignas(16) ALfloat samplesBlended[MAX_UPDATE_SAMPLES];
-
- for (ALsizei i{0};i < td;i++)
- samplesBlended[i] = lerp(mSampleBufferA[i], mSampleBufferB[i], lfo[i]);
-
- /* Now, mix the processed sound data to the output. */
- MixSamples(samplesBlended, samplesOut, mChans[c].CurrentGains, mChans[c].TargetGains,
- samplesToDo-base, base, td);
- }
-
- base += td;
- }
-}
-
-
-void Vmorpher_setParami(EffectProps* props, ALCcontext *context, ALenum param, ALint val)
-{
- switch(param)
- {
- case AL_VOCAL_MORPHER_WAVEFORM:
- if(!(val >= AL_VOCAL_MORPHER_MIN_WAVEFORM && val <= AL_VOCAL_MORPHER_MAX_WAVEFORM))
- SETERR_RETURN(context, AL_INVALID_VALUE,, "Vocal morpher waveform out of range");
- props->Vmorpher.Waveform = val;
- break;
-
- case AL_VOCAL_MORPHER_PHONEMEA:
- if(!(val >= AL_VOCAL_MORPHER_MIN_PHONEMEA && val <= AL_VOCAL_MORPHER_MAX_PHONEMEA))
- SETERR_RETURN(context, AL_INVALID_VALUE,, "Vocal morpher phoneme-a out of range");
- props->Vmorpher.PhonemeA = val;
- break;
-
- case AL_VOCAL_MORPHER_PHONEMEB:
- if(!(val >= AL_VOCAL_MORPHER_MIN_PHONEMEB && val <= AL_VOCAL_MORPHER_MAX_PHONEMEB))
- SETERR_RETURN(context, AL_INVALID_VALUE,, "Vocal morpher phoneme-b out of range");
- props->Vmorpher.PhonemeB = val;
- break;
-
- case AL_VOCAL_MORPHER_PHONEMEA_COARSE_TUNING:
- if(!(val >= AL_VOCAL_MORPHER_MIN_PHONEMEA_COARSE_TUNING && val <= AL_VOCAL_MORPHER_MAX_PHONEMEA_COARSE_TUNING))
- SETERR_RETURN(context, AL_INVALID_VALUE,, "Vocal morpher phoneme-a coarse tuning out of range");
- props->Vmorpher.PhonemeACoarseTuning = val;
- break;
-
- case AL_VOCAL_MORPHER_PHONEMEB_COARSE_TUNING:
- if(!(val >= AL_VOCAL_MORPHER_MIN_PHONEMEB_COARSE_TUNING && val <= AL_VOCAL_MORPHER_MAX_PHONEMEB_COARSE_TUNING))
- SETERR_RETURN(context, AL_INVALID_VALUE,, "Vocal morpher phoneme-b coarse tuning out of range");
- props->Vmorpher.PhonemeBCoarseTuning = val;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid vocal morpher integer property 0x%04x", param);
- }
-}
-void Vmorpher_setParamiv(EffectProps*, ALCcontext *context, ALenum param, const ALint*)
-{ alSetError(context, AL_INVALID_ENUM, "Invalid vocal morpher integer-vector property 0x%04x", param); }
-void Vmorpher_setParamf(EffectProps *props, ALCcontext *context, ALenum param, ALfloat val)
-{
- switch(param)
- {
- case AL_VOCAL_MORPHER_RATE:
- if(!(val >= AL_VOCAL_MORPHER_MIN_RATE && val <= AL_VOCAL_MORPHER_MAX_RATE))
- SETERR_RETURN(context, AL_INVALID_VALUE,, "Vocal morpher rate out of range");
- props->Vmorpher.Rate = val;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid vocal morpher float property 0x%04x", param);
- }
-}
-void Vmorpher_setParamfv(EffectProps *props, ALCcontext *context, ALenum param, const ALfloat *vals)
-{ Vmorpher_setParamf(props, context, param, vals[0]); }
-
-void Vmorpher_getParami(const EffectProps* props, ALCcontext *context, ALenum param, ALint* val)
-{
- switch(param)
- {
- case AL_VOCAL_MORPHER_PHONEMEA:
- *val = props->Vmorpher.PhonemeA;
- break;
-
- case AL_VOCAL_MORPHER_PHONEMEB:
- *val = props->Vmorpher.PhonemeB;
- break;
-
- case AL_VOCAL_MORPHER_PHONEMEA_COARSE_TUNING:
- *val = props->Vmorpher.PhonemeACoarseTuning;
- break;
-
- case AL_VOCAL_MORPHER_PHONEMEB_COARSE_TUNING:
- *val = props->Vmorpher.PhonemeBCoarseTuning;
- break;
-
- case AL_VOCAL_MORPHER_WAVEFORM:
- *val = props->Vmorpher.Waveform;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid vocal morpher integer property 0x%04x", param);
- }
-}
-void Vmorpher_getParamiv(const EffectProps*, ALCcontext *context, ALenum param, ALint*)
-{ alSetError(context, AL_INVALID_ENUM, "Invalid vocal morpher integer-vector property 0x%04x", param); }
-void Vmorpher_getParamf(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *val)
-{
- switch(param)
- {
- case AL_VOCAL_MORPHER_RATE:
- *val = props->Vmorpher.Rate;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid vocal morpher float property 0x%04x", param);
- }
-}
-void Vmorpher_getParamfv(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *vals)
-{ Vmorpher_getParamf(props, context, param, vals); }
-
-DEFINE_ALEFFECT_VTABLE(Vmorpher);
-
-
-struct VmorpherStateFactory final : public EffectStateFactory {
- EffectState *create() override { return new VmorpherState{}; }
- EffectProps getDefaultProps() const noexcept override;
- const EffectVtable *getEffectVtable() const noexcept override { return &Vmorpher_vtable; }
-};
-
-EffectProps VmorpherStateFactory::getDefaultProps() const noexcept
-{
- EffectProps props{};
- props.Vmorpher.Rate = AL_VOCAL_MORPHER_DEFAULT_RATE;
- props.Vmorpher.PhonemeA = AL_VOCAL_MORPHER_DEFAULT_PHONEMEA;
- props.Vmorpher.PhonemeB = AL_VOCAL_MORPHER_DEFAULT_PHONEMEB;
- props.Vmorpher.PhonemeACoarseTuning = AL_VOCAL_MORPHER_DEFAULT_PHONEMEA_COARSE_TUNING;
- props.Vmorpher.PhonemeBCoarseTuning = AL_VOCAL_MORPHER_DEFAULT_PHONEMEB_COARSE_TUNING;
- props.Vmorpher.Waveform = AL_VOCAL_MORPHER_DEFAULT_WAVEFORM;
- return props;
-}
-
-} // namespace
-
-EffectStateFactory *VmorpherStateFactory_getFactory()
-{
- static VmorpherStateFactory VmorpherFactory{};
- return &VmorpherFactory;
-}
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