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162 lines
6.0 KiB
162 lines
6.0 KiB
/**
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* OpenAL cross platform audio library
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* Copyright (C) 2011 by Chris Robinson.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* Or go to http://www.gnu.org/copyleft/lgpl.html
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*/
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#include "config.h"
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#include <cstdlib>
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#include <cmath>
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#include <algorithm>
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#include "alMain.h"
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#include "alcontext.h"
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#include "alAuxEffectSlot.h"
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#include "alError.h"
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#include "alu.h"
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namespace {
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struct DedicatedState final : public EffectState {
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ALfloat mCurrentGains[MAX_OUTPUT_CHANNELS];
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ALfloat mTargetGains[MAX_OUTPUT_CHANNELS];
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ALboolean deviceUpdate(const ALCdevice *device) override;
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void update(const ALCcontext *context, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target) override;
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void process(ALsizei samplesToDo, const ALfloat (*RESTRICT samplesIn)[BUFFERSIZE], const ALsizei numInput, ALfloat (*RESTRICT samplesOut)[BUFFERSIZE], const ALsizei numOutput) override;
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DEF_NEWDEL(DedicatedState)
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};
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ALboolean DedicatedState::deviceUpdate(const ALCdevice *UNUSED(device))
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{
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std::fill(std::begin(mCurrentGains), std::end(mCurrentGains), 0.0f);
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return AL_TRUE;
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}
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void DedicatedState::update(const ALCcontext* UNUSED(context), const ALeffectslot *slot, const EffectProps *props, const EffectTarget target)
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{
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std::fill(std::begin(mTargetGains), std::end(mTargetGains), 0.0f);
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const ALfloat Gain{slot->Params.Gain * props->Dedicated.Gain};
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if(slot->Params.EffectType == AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT)
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{
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const int idx{!target.RealOut ? -1 : GetChannelIdxByName(*target.RealOut, LFE)};
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if(idx != -1)
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{
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mOutBuffer = target.RealOut->Buffer;
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mOutChannels = target.RealOut->NumChannels;
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mTargetGains[idx] = Gain;
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}
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}
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else if(slot->Params.EffectType == AL_EFFECT_DEDICATED_DIALOGUE)
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{
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/* Dialog goes to the front-center speaker if it exists, otherwise it
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* plays from the front-center location. */
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const int idx{!target.RealOut ? -1 : GetChannelIdxByName(*target.RealOut, FrontCenter)};
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if(idx != -1)
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{
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mOutBuffer = target.RealOut->Buffer;
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mOutChannels = target.RealOut->NumChannels;
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mTargetGains[idx] = Gain;
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}
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else
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{
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ALfloat coeffs[MAX_AMBI_CHANNELS];
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CalcDirectionCoeffs({0.0f, 0.0f, -1.0f}, 0.0f, coeffs);
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mOutBuffer = target.Main->Buffer;
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mOutChannels = target.Main->NumChannels;
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ComputePanGains(target.Main, coeffs, Gain, mTargetGains);
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}
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}
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}
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void DedicatedState::process(ALsizei samplesToDo, const ALfloat (*RESTRICT samplesIn)[BUFFERSIZE], const ALsizei /*numInput*/, ALfloat (*RESTRICT samplesOut)[BUFFERSIZE], const ALsizei numOutput)
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{
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MixSamples(samplesIn[0], numOutput, samplesOut, mCurrentGains, mTargetGains, samplesToDo, 0,
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samplesToDo);
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}
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void Dedicated_setParami(EffectProps*, ALCcontext *context, ALenum param, ALint)
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{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer property 0x%04x", param); }
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void Dedicated_setParamiv(EffectProps*, ALCcontext *context, ALenum param, const ALint*)
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{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer-vector property 0x%04x", param); }
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void Dedicated_setParamf(EffectProps *props, ALCcontext *context, ALenum param, ALfloat val)
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{
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switch(param)
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{
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case AL_DEDICATED_GAIN:
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if(!(val >= 0.0f && std::isfinite(val)))
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SETERR_RETURN(context, AL_INVALID_VALUE,, "Dedicated gain out of range");
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props->Dedicated.Gain = val;
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break;
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default:
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alSetError(context, AL_INVALID_ENUM, "Invalid dedicated float property 0x%04x", param);
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}
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}
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void Dedicated_setParamfv(EffectProps *props, ALCcontext *context, ALenum param, const ALfloat *vals)
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{ Dedicated_setParamf(props, context, param, vals[0]); }
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void Dedicated_getParami(const EffectProps*, ALCcontext *context, ALenum param, ALint*)
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{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer property 0x%04x", param); }
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void Dedicated_getParamiv(const EffectProps*, ALCcontext *context, ALenum param, ALint*)
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{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer-vector property 0x%04x", param); }
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void Dedicated_getParamf(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *val)
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{
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switch(param)
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{
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case AL_DEDICATED_GAIN:
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*val = props->Dedicated.Gain;
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break;
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default:
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alSetError(context, AL_INVALID_ENUM, "Invalid dedicated float property 0x%04x", param);
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}
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}
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void Dedicated_getParamfv(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *vals)
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{ Dedicated_getParamf(props, context, param, vals); }
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DEFINE_ALEFFECT_VTABLE(Dedicated);
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struct DedicatedStateFactory final : public EffectStateFactory {
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EffectState *create() override { return new DedicatedState{}; }
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EffectProps getDefaultProps() const noexcept override;
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const EffectVtable *getEffectVtable() const noexcept override { return &Dedicated_vtable; }
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};
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EffectProps DedicatedStateFactory::getDefaultProps() const noexcept
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{
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EffectProps props{};
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props.Dedicated.Gain = 1.0f;
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return props;
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}
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} // namespace
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EffectStateFactory *DedicatedStateFactory_getFactory()
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{
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static DedicatedStateFactory DedicatedFactory{};
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return &DedicatedFactory;
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}
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