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Diffstat (limited to 'Alc/effects/modulator.cpp')
| -rw-r--r-- | Alc/effects/modulator.cpp | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/Alc/effects/modulator.cpp b/Alc/effects/modulator.cpp deleted file mode 100644 index 086482d7..00000000 --- a/Alc/effects/modulator.cpp +++ /dev/null @@ -1,279 +0,0 @@ -/** - * OpenAL cross platform audio library - * Copyright (C) 2009 by Chris Robinson. - * 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 <cmath> -#include <algorithm> - -#include "alcmain.h" -#include "alcontext.h" -#include "alAuxEffectSlot.h" -#include "alError.h" -#include "alu.h" -#include "filters/biquad.h" -#include "vecmat.h" - - -namespace { - -#define MAX_UPDATE_SAMPLES 128 - -#define WAVEFORM_FRACBITS 24 -#define WAVEFORM_FRACONE (1<<WAVEFORM_FRACBITS) -#define WAVEFORM_FRACMASK (WAVEFORM_FRACONE-1) - -inline ALfloat Sin(ALsizei index) -{ - return std::sin(static_cast<ALfloat>(index) * - (al::MathDefs<float>::Tau() / ALfloat{WAVEFORM_FRACONE})); -} - -inline ALfloat Saw(ALsizei index) -{ - return static_cast<ALfloat>(index)*(2.0f/WAVEFORM_FRACONE) - 1.0f; -} - -inline ALfloat Square(ALsizei index) -{ - return static_cast<ALfloat>(((index>>(WAVEFORM_FRACBITS-2))&2) - 1); -} - -inline ALfloat One(ALsizei) -{ - return 1.0f; -} - -template<ALfloat func(ALsizei)> -void Modulate(ALfloat *RESTRICT dst, ALsizei index, const ALsizei step, ALsizei todo) -{ - ALsizei i; - for(i = 0;i < todo;i++) - { - index += step; - index &= WAVEFORM_FRACMASK; - dst[i] = func(index); - } -} - - -struct ModulatorState final : public EffectState { - void (*mGetSamples)(ALfloat*RESTRICT, ALsizei, const ALsizei, ALsizei){}; - - ALsizei mIndex{0}; - ALsizei mStep{1}; - - struct { - BiquadFilter Filter; - - ALfloat CurrentGains[MAX_OUTPUT_CHANNELS]{}; - ALfloat TargetGains[MAX_OUTPUT_CHANNELS]{}; - } mChans[MAX_AMBI_CHANNELS]; - - - 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; - - DEF_NEWDEL(ModulatorState) -}; - -ALboolean ModulatorState::deviceUpdate(const ALCdevice*) -{ - for(auto &e : mChans) - { - e.Filter.clear(); - std::fill(std::begin(e.CurrentGains), std::end(e.CurrentGains), 0.0f); - } - return AL_TRUE; -} - -void ModulatorState::update(const ALCcontext *context, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target) -{ - const ALCdevice *device{context->Device}; - - const float step{props->Modulator.Frequency / static_cast<ALfloat>(device->Frequency)}; - mStep = fastf2i(clampf(step*WAVEFORM_FRACONE, 0.0f, ALfloat{WAVEFORM_FRACONE-1})); - - if(mStep == 0) - mGetSamples = Modulate<One>; - else if(props->Modulator.Waveform == AL_RING_MODULATOR_SINUSOID) - mGetSamples = Modulate<Sin>; - else if(props->Modulator.Waveform == AL_RING_MODULATOR_SAWTOOTH) - mGetSamples = Modulate<Saw>; - else /*if(props->Modulator.Waveform == AL_RING_MODULATOR_SQUARE)*/ - mGetSamples = Modulate<Square>; - - ALfloat f0norm{props->Modulator.HighPassCutoff / static_cast<ALfloat>(device->Frequency)}; - f0norm = clampf(f0norm, 1.0f/512.0f, 0.49f); - /* Bandwidth value is constant in octaves. */ - mChans[0].Filter.setParams(BiquadType::HighPass, 1.0f, f0norm, - BiquadFilter::rcpQFromBandwidth(f0norm, 0.75f)); - for(size_t i{1u};i < slot->Wet.Buffer.size();++i) - mChans[i].Filter.copyParamsFrom(mChans[0].Filter); - - 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 ModulatorState::process(const ALsizei samplesToDo, const FloatBufferLine *RESTRICT samplesIn, const ALsizei numInput, const al::span<FloatBufferLine> samplesOut) -{ - for(ALsizei base{0};base < samplesToDo;) - { - alignas(16) ALfloat modsamples[MAX_UPDATE_SAMPLES]; - ALsizei td = mini(MAX_UPDATE_SAMPLES, samplesToDo-base); - ALsizei c, i; - - mGetSamples(modsamples, mIndex, mStep, td); - mIndex += (mStep*td) & WAVEFORM_FRACMASK; - mIndex &= WAVEFORM_FRACMASK; - - ASSUME(numInput > 0); - for(c = 0;c < numInput;c++) - { - alignas(16) ALfloat temps[MAX_UPDATE_SAMPLES]; - - mChans[c].Filter.process(temps, &samplesIn[c][base], td); - for(i = 0;i < td;i++) - temps[i] *= modsamples[i]; - - MixSamples(temps, samplesOut, mChans[c].CurrentGains, mChans[c].TargetGains, - samplesToDo-base, base, td); - } - - base += td; - } -} - - -void Modulator_setParamf(EffectProps *props, ALCcontext *context, ALenum param, ALfloat val) -{ - switch(param) - { - case AL_RING_MODULATOR_FREQUENCY: - if(!(val >= AL_RING_MODULATOR_MIN_FREQUENCY && val <= AL_RING_MODULATOR_MAX_FREQUENCY)) - SETERR_RETURN(context, AL_INVALID_VALUE,, "Modulator frequency out of range"); - props->Modulator.Frequency = val; - break; - - case AL_RING_MODULATOR_HIGHPASS_CUTOFF: - if(!(val >= AL_RING_MODULATOR_MIN_HIGHPASS_CUTOFF && val <= AL_RING_MODULATOR_MAX_HIGHPASS_CUTOFF)) - SETERR_RETURN(context, AL_INVALID_VALUE,, "Modulator high-pass cutoff out of range"); - props->Modulator.HighPassCutoff = val; - break; - - default: - alSetError(context, AL_INVALID_ENUM, "Invalid modulator float property 0x%04x", param); - } -} -void Modulator_setParamfv(EffectProps *props, ALCcontext *context, ALenum param, const ALfloat *vals) -{ Modulator_setParamf(props, context, param, vals[0]); } -void Modulator_setParami(EffectProps *props, ALCcontext *context, ALenum param, ALint val) -{ - switch(param) - { - case AL_RING_MODULATOR_FREQUENCY: - case AL_RING_MODULATOR_HIGHPASS_CUTOFF: - Modulator_setParamf(props, context, param, static_cast<ALfloat>(val)); - break; - - case AL_RING_MODULATOR_WAVEFORM: - if(!(val >= AL_RING_MODULATOR_MIN_WAVEFORM && val <= AL_RING_MODULATOR_MAX_WAVEFORM)) - SETERR_RETURN(context, AL_INVALID_VALUE,, "Invalid modulator waveform"); - props->Modulator.Waveform = val; - break; - - default: - alSetError(context, AL_INVALID_ENUM, "Invalid modulator integer property 0x%04x", param); - } -} -void Modulator_setParamiv(EffectProps *props, ALCcontext *context, ALenum param, const ALint *vals) -{ Modulator_setParami(props, context, param, vals[0]); } - -void Modulator_getParami(const EffectProps *props, ALCcontext *context, ALenum param, ALint *val) -{ - switch(param) - { - case AL_RING_MODULATOR_FREQUENCY: - *val = static_cast<ALint>(props->Modulator.Frequency); - break; - case AL_RING_MODULATOR_HIGHPASS_CUTOFF: - *val = static_cast<ALint>(props->Modulator.HighPassCutoff); - break; - case AL_RING_MODULATOR_WAVEFORM: - *val = props->Modulator.Waveform; - break; - - default: - alSetError(context, AL_INVALID_ENUM, "Invalid modulator integer property 0x%04x", param); - } -} -void Modulator_getParamiv(const EffectProps *props, ALCcontext *context, ALenum param, ALint *vals) -{ Modulator_getParami(props, context, param, vals); } -void Modulator_getParamf(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *val) -{ - switch(param) - { - case AL_RING_MODULATOR_FREQUENCY: - *val = props->Modulator.Frequency; - break; - case AL_RING_MODULATOR_HIGHPASS_CUTOFF: - *val = props->Modulator.HighPassCutoff; - break; - - default: - alSetError(context, AL_INVALID_ENUM, "Invalid modulator float property 0x%04x", param); - } -} -void Modulator_getParamfv(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *vals) -{ Modulator_getParamf(props, context, param, vals); } - -DEFINE_ALEFFECT_VTABLE(Modulator); - - -struct ModulatorStateFactory final : public EffectStateFactory { - EffectState *create() override { return new ModulatorState{}; } - EffectProps getDefaultProps() const noexcept override; - const EffectVtable *getEffectVtable() const noexcept override { return &Modulator_vtable; } -}; - -EffectProps ModulatorStateFactory::getDefaultProps() const noexcept -{ - EffectProps props{}; - props.Modulator.Frequency = AL_RING_MODULATOR_DEFAULT_FREQUENCY; - props.Modulator.HighPassCutoff = AL_RING_MODULATOR_DEFAULT_HIGHPASS_CUTOFF; - props.Modulator.Waveform = AL_RING_MODULATOR_DEFAULT_WAVEFORM; - return props; -} - -} // namespace - -EffectStateFactory *ModulatorStateFactory_getFactory() -{ - static ModulatorStateFactory ModulatorFactory{}; - return &ModulatorFactory; -} |