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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 <stdlib.h>
#include "alMain.h"
#include "alFilter.h"
#include "alAuxEffectSlot.h"
#include "alError.h"
#include "alu.h"
typedef struct ALdedicatedState {
DERIVE_FROM_TYPE(ALeffectState);
ALfloat gains[MaxChannels];
} ALdedicatedState;
static ALvoid ALdedicatedState_Destruct(ALdedicatedState *UNUSED(state))
{
}
static ALboolean ALdedicatedState_deviceUpdate(ALdedicatedState *UNUSED(state), ALCdevice *UNUSED(device))
{
return AL_TRUE;
}
static ALvoid ALdedicatedState_update(ALdedicatedState *state, ALCdevice *device, const ALeffectslot *Slot)
{
ALfloat Gain;
ALuint i;
for(i = 0;i < MaxChannels;i++)
state->gains[i] = 0.0f;
Gain = Slot->Gain * Slot->EffectProps.Dedicated.Gain;
if(Slot->EffectType == AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT)
{
if(GetChannelIdxByName(device, LFE) != -1)
state->gains[LFE] = Gain;
}
else if(Slot->EffectType == AL_EFFECT_DEDICATED_DIALOGUE)
{
/* Dialog goes to the front-center speaker if it exists, otherwise it
* plays from the front-center location. */
if(GetChannelIdxByName(device, FrontCenter) != -1)
state->gains[FrontCenter] = Gain;
else
{
static const ALfloat front_dir[3] = { 0.0f, 0.0f, -1.0f };
ComputeDirectionalGains(device, front_dir, Gain, state->gains);
}
}
}
static ALvoid ALdedicatedState_process(ALdedicatedState *state, ALuint SamplesToDo, const ALfloat *restrict SamplesIn, ALfloat (*restrict SamplesOut)[BUFFERSIZE])
{
const ALfloat *gains = state->gains;
ALuint i, c;
for(c = 0;c < MaxChannels;c++)
{
if(!(gains[c] > GAIN_SILENCE_THRESHOLD))
continue;
for(i = 0;i < SamplesToDo;i++)
SamplesOut[c][i] = SamplesIn[i] * gains[c];
}
}
DECLARE_DEFAULT_ALLOCATORS(ALdedicatedState)
DEFINE_ALEFFECTSTATE_VTABLE(ALdedicatedState);
typedef struct ALdedicatedStateFactory {
DERIVE_FROM_TYPE(ALeffectStateFactory);
} ALdedicatedStateFactory;
ALeffectState *ALdedicatedStateFactory_create(ALdedicatedStateFactory *UNUSED(factory))
{
ALdedicatedState *state;
ALsizei s;
state = ALdedicatedState_New(sizeof(*state));
if(!state) return NULL;
SET_VTABLE2(ALdedicatedState, ALeffectState, state);
for(s = 0;s < MaxChannels;s++)
state->gains[s] = 0.0f;
return STATIC_CAST(ALeffectState, state);
}
DEFINE_ALEFFECTSTATEFACTORY_VTABLE(ALdedicatedStateFactory);
ALeffectStateFactory *ALdedicatedStateFactory_getFactory(void)
{
static ALdedicatedStateFactory DedicatedFactory = { { GET_VTABLE2(ALdedicatedStateFactory, ALeffectStateFactory) } };
return STATIC_CAST(ALeffectStateFactory, &DedicatedFactory);
}
void ALdedicated_setParami(ALeffect *UNUSED(effect), ALCcontext *context, ALenum UNUSED(param), ALint UNUSED(val))
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
void ALdedicated_setParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals)
{
ALdedicated_setParami(effect, context, param, vals[0]);
}
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 && isfinite(val)))
SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
props->Dedicated.Gain = val;
break;
default:
SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
}
}
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 UNUSED(param), ALint *UNUSED(val))
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
void ALdedicated_getParamiv(const ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals)
{
ALdedicated_getParami(effect, context, param, vals);
}
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:
SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
}
}
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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