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/**
* 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 "alMain.h"
#include "alcontext.h"
#include "alAuxEffectSlot.h"
#include "alError.h"
#include "alu.h"
struct ALdedicatedState 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 ALeffectProps *props, const EffectTarget target) override;
void process(ALsizei samplesToDo, const ALfloat (*RESTRICT samplesIn)[BUFFERSIZE], ALfloat (*RESTRICT samplesOut)[BUFFERSIZE], ALsizei numChannels) override;
DEF_NEWDEL(ALdedicatedState)
};
ALboolean ALdedicatedState::deviceUpdate(const ALCdevice *UNUSED(device))
{
std::fill(std::begin(mCurrentGains), std::end(mCurrentGains), 0.0f);
return AL_TRUE;
}
void ALdedicatedState::update(const ALCcontext* UNUSED(context), const ALeffectslot *slot, const ALeffectProps *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 int idx{!target.RealOut ? -1 : GetChannelIdxByName(*target.RealOut, LFE)};
if(idx != -1)
{
mOutBuffer = target.RealOut->Buffer;
mOutChannels = target.RealOut->NumChannels;
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 int idx{!target.RealOut ? -1 : GetChannelIdxByName(*target.RealOut, FrontCenter)};
if(idx != -1)
{
mOutBuffer = target.RealOut->Buffer;
mOutChannels = target.RealOut->NumChannels;
mTargetGains[idx] = Gain;
}
else
{
ALfloat coeffs[MAX_AMBI_COEFFS];
CalcAngleCoeffs(0.0f, 0.0f, 0.0f, coeffs);
mOutBuffer = target.Main->Buffer;
mOutChannels = target.Main->NumChannels;
ComputePanGains(target.Main, coeffs, Gain, mTargetGains);
}
}
}
void ALdedicatedState::process(ALsizei SamplesToDo, const ALfloat (*RESTRICT SamplesIn)[BUFFERSIZE], ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE], ALsizei NumChannels)
{
MixSamples(SamplesIn[0], NumChannels, SamplesOut, mCurrentGains,
mTargetGains, SamplesToDo, 0, SamplesToDo);
}
struct DedicatedStateFactory final : public EffectStateFactory {
EffectState *create() override;
};
EffectState *DedicatedStateFactory::create()
{ return new ALdedicatedState{}; }
EffectStateFactory *DedicatedStateFactory_getFactory(void)
{
static DedicatedStateFactory DedicatedFactory{};
return &DedicatedFactory;
}
void ALdedicated_setParami(ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALint UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer property 0x%04x", param); }
void ALdedicated_setParamiv(ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, const ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer-vector property 0x%04x", param); }
void ALdedicated_setParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val)
{
ALeffectProps *props = &effect->Props;
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:
alSetError(context, AL_INVALID_ENUM, "Invalid dedicated float property 0x%04x", param);
}
}
void ALdedicated_setParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals)
{ ALdedicated_setParamf(effect, context, param, vals[0]); }
void ALdedicated_getParami(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALint *UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer property 0x%04x", param); }
void ALdedicated_getParamiv(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid dedicated integer-vector property 0x%04x", param); }
void ALdedicated_getParamf(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val)
{
const ALeffectProps *props = &effect->Props;
switch(param)
{
case AL_DEDICATED_GAIN:
*val = props->Dedicated.Gain;
break;
default:
alSetError(context, AL_INVALID_ENUM, "Invalid dedicated float property 0x%04x", param);
}
}
void ALdedicated_getParamfv(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals)
{ ALdedicated_getParamf(effect, context, param, vals); }
DEFINE_ALEFFECT_VTABLE(ALdedicated);
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