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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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, 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 {
// Must be first in all effects!
ALeffectState state;
ALfloat gains[MaxChannels];
} ALdedicatedState;
static ALvoid DedicatedDestroy(ALeffectState *effect)
{
ALdedicatedState *state = (ALdedicatedState*)effect;
free(state);
}
static ALboolean DedicatedDeviceUpdate(ALeffectState *effect, ALCdevice *Device)
{
(void)effect;
(void)Device;
return AL_TRUE;
}
static ALvoid DedicatedUpdate(ALeffectState *effect, ALCdevice *device, const ALeffectslot *Slot)
{
ALdedicatedState *state = (ALdedicatedState*)effect;
ALfloat Gain;
ALsizei s;
Gain = Slot->Gain * Slot->effect.Dedicated.Gain;
for(s = 0;s < MaxChannels;s++)
state->gains[s] = 0.0f;
if(Slot->effect.type == AL_EFFECT_DEDICATED_DIALOGUE)
ComputeAngleGains(device, atan2f(0.0f, 1.0f), 0.0f, Gain, state->gains);
else if(Slot->effect.type == AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT)
state->gains[LFE] = Gain;
}
static ALvoid DedicatedProcess(ALeffectState *effect, ALuint SamplesToDo, const ALfloat *RESTRICT SamplesIn, ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE])
{
ALdedicatedState *state = (ALdedicatedState*)effect;
const ALfloat *gains = state->gains;
ALuint i, c;
for(c = 0;c < MaxChannels;c++)
{
for(i = 0;i < SamplesToDo;i++)
SamplesOut[c][i] = SamplesIn[i] * gains[c];
}
}
ALeffectState *DedicatedCreate(void)
{
ALdedicatedState *state;
ALsizei s;
state = malloc(sizeof(*state));
if(!state)
return NULL;
state->state.Destroy = DedicatedDestroy;
state->state.DeviceUpdate = DedicatedDeviceUpdate;
state->state.Update = DedicatedUpdate;
state->state.Process = DedicatedProcess;
for(s = 0;s < MaxChannels;s++)
state->gains[s] = 0.0f;
return &state->state;
}
void ded_SetParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint val)
{ (void)effect;(void)param;(void)val; alSetError(context, AL_INVALID_ENUM); }
void ded_SetParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals)
{
ded_SetParami(effect, context, param, vals[0]);
}
void ded_SetParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val)
{
switch(param)
{
case AL_DEDICATED_GAIN:
if(val >= 0.0f && isfinite(val))
effect->Dedicated.Gain = val;
else
alSetError(context, AL_INVALID_VALUE);
break;
default:
alSetError(context, AL_INVALID_ENUM);
break;
}
}
void ded_SetParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals)
{
ded_SetParamf(effect, context, param, vals[0]);
}
void ded_GetParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint *val)
{ (void)effect;(void)param;(void)val; alSetError(context, AL_INVALID_ENUM); }
void ded_GetParamiv(ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals)
{
ded_GetParami(effect, context, param, vals);
}
void ded_GetParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val)
{
switch(param)
{
case AL_DEDICATED_GAIN:
*val = effect->Dedicated.Gain;
break;
default:
alSetError(context, AL_INVALID_ENUM);
break;
}
}
void ded_GetParamfv(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals)
{
ded_GetParamf(effect, context, param, vals);
}
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