diff options
Diffstat (limited to 'alc/effects/dedicated.cpp')
| -rw-r--r-- | alc/effects/dedicated.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/alc/effects/dedicated.cpp b/alc/effects/dedicated.cpp new file mode 100644 index 00000000..aa81e13b --- /dev/null +++ b/alc/effects/dedicated.cpp @@ -0,0 +1,160 @@ +/** + * OpenAL cross platform audio library + * Copyright (C) 2011 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 <cstdlib> +#include <cmath> +#include <algorithm> + +#include "al/auxeffectslot.h" +#include "alcmain.h" +#include "alcontext.h" +#include "alu.h" + + +namespace { + +struct DedicatedState final : public EffectState { + ALfloat mCurrentGains[MAX_OUTPUT_CHANNELS]; + ALfloat mTargetGains[MAX_OUTPUT_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 size_t samplesToDo, const al::span<const FloatBufferLine> samplesIn, const al::span<FloatBufferLine> samplesOut) override; + + DEF_NEWDEL(DedicatedState) +}; + +ALboolean DedicatedState::deviceUpdate(const ALCdevice*) +{ + std::fill(std::begin(mCurrentGains), std::end(mCurrentGains), 0.0f); + return AL_TRUE; +} + +void DedicatedState::update(const ALCcontext*, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target) +{ + std::fill(std::begin(mTargetGains), std::end(mTargetGains), 0.0f); + + const ALfloat Gain{slot->Params.Gain * props->Dedicated.Gain}; + + if(slot->Params.EffectType == AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT) + { + const ALuint idx{!target.RealOut ? INVALID_CHANNEL_INDEX : + GetChannelIdxByName(*target.RealOut, LFE)}; + if(idx != INVALID_CHANNEL_INDEX) + { + mOutTarget = target.RealOut->Buffer; + mTargetGains[idx] = Gain; + } + } + else if(slot->Params.EffectType == AL_EFFECT_DEDICATED_DIALOGUE) + { + /* Dialog goes to the front-center speaker if it exists, otherwise it + * plays from the front-center location. */ + const ALuint idx{!target.RealOut ? INVALID_CHANNEL_INDEX : + GetChannelIdxByName(*target.RealOut, FrontCenter)}; + if(idx != INVALID_CHANNEL_INDEX) + { + mOutTarget = target.RealOut->Buffer; + mTargetGains[idx] = Gain; + } + else + { + ALfloat coeffs[MAX_AMBI_CHANNELS]; + CalcDirectionCoeffs({0.0f, 0.0f, -1.0f}, 0.0f, coeffs); + + mOutTarget = target.Main->Buffer; + ComputePanGains(target.Main, coeffs, Gain, mTargetGains); + } + } +} + +void DedicatedState::process(const size_t samplesToDo, const al::span<const FloatBufferLine> samplesIn, const al::span<FloatBufferLine> samplesOut) +{ + MixSamples({samplesIn[0].data(), samplesToDo}, samplesOut, mCurrentGains, mTargetGains, + samplesToDo, 0); +} + + +void Dedicated_setParami(EffectProps*, ALCcontext *context, ALenum param, ALint) +{ context->setError(AL_INVALID_ENUM, "Invalid dedicated integer property 0x%04x", param); } +void Dedicated_setParamiv(EffectProps*, ALCcontext *context, ALenum param, const ALint*) +{ context->setError(AL_INVALID_ENUM, "Invalid dedicated integer-vector property 0x%04x", param); } +void Dedicated_setParamf(EffectProps *props, ALCcontext *context, ALenum param, ALfloat val) +{ + switch(param) + { + case AL_DEDICATED_GAIN: + if(!(val >= 0.0f && std::isfinite(val))) + SETERR_RETURN(context, AL_INVALID_VALUE,, "Dedicated gain out of range"); + props->Dedicated.Gain = val; + break; + + default: + context->setError(AL_INVALID_ENUM, "Invalid dedicated float property 0x%04x", param); + } +} +void Dedicated_setParamfv(EffectProps *props, ALCcontext *context, ALenum param, const ALfloat *vals) +{ Dedicated_setParamf(props, context, param, vals[0]); } + +void Dedicated_getParami(const EffectProps*, ALCcontext *context, ALenum param, ALint*) +{ context->setError(AL_INVALID_ENUM, "Invalid dedicated integer property 0x%04x", param); } +void Dedicated_getParamiv(const EffectProps*, ALCcontext *context, ALenum param, ALint*) +{ context->setError(AL_INVALID_ENUM, "Invalid dedicated integer-vector property 0x%04x", param); } +void Dedicated_getParamf(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *val) +{ + switch(param) + { + case AL_DEDICATED_GAIN: + *val = props->Dedicated.Gain; + break; + + default: + context->setError(AL_INVALID_ENUM, "Invalid dedicated float property 0x%04x", param); + } +} +void Dedicated_getParamfv(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *vals) +{ Dedicated_getParamf(props, context, param, vals); } + +DEFINE_ALEFFECT_VTABLE(Dedicated); + + +struct DedicatedStateFactory final : public EffectStateFactory { + EffectState *create() override { return new DedicatedState{}; } + EffectProps getDefaultProps() const noexcept override; + const EffectVtable *getEffectVtable() const noexcept override { return &Dedicated_vtable; } +}; + +EffectProps DedicatedStateFactory::getDefaultProps() const noexcept +{ + EffectProps props{}; + props.Dedicated.Gain = 1.0f; + return props; +} + +} // namespace + +EffectStateFactory *DedicatedStateFactory_getFactory() +{ + static DedicatedStateFactory DedicatedFactory{}; + return &DedicatedFactory; +} |