470 lines
12 KiB
C
470 lines
12 KiB
C
/**
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* OpenAL cross platform audio library
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* Copyright (C) 1999-2007 by authors.
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 <stdlib.h>
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#include <math.h>
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#include "AL/al.h"
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#include "AL/alc.h"
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#include "alMain.h"
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#include "alAuxEffectSlot.h"
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#include "alThunk.h"
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#include "alError.h"
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static ALvoid InitializeEffect(ALCcontext *Context, ALeffectslot *ALEffectSlot, ALeffect *effect);
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ALvoid AL_APIENTRY alGenAuxiliaryEffectSlots(ALsizei n, ALuint *effectslots)
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{
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ALCcontext *Context;
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ALsizei i, j;
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Context = GetContextSuspended();
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if(!Context) return;
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if (n > 0)
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{
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ALCdevice *Device = Context->Device;
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if(Context->AuxiliaryEffectSlotCount+n <= Device->AuxiliaryEffectSlotMax)
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{
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// Check that enough memory has been allocted in the 'effectslots' array for n Effect Slots
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if (!IsBadWritePtr((void*)effectslots, n * sizeof(ALuint)))
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{
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ALeffectslot **list = &Context->AuxiliaryEffectSlot;
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while(*list)
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list = &(*list)->next;
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i = 0;
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while(i < n)
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{
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*list = calloc(1, sizeof(ALeffectslot));
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if(!(*list))
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{
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// We must have run out or memory
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alDeleteAuxiliaryEffectSlots(i, effectslots);
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alSetError(AL_OUT_OF_MEMORY);
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break;
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}
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(*list)->Gain = 1.0;
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(*list)->AuxSendAuto = AL_TRUE;
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for(j = 0;j < BUFFERSIZE;j++)
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(*list)->WetBuffer[j] = 0.0f;
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(*list)->refcount = 0;
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effectslots[i] = (ALuint)ALTHUNK_ADDENTRY(*list);
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(*list)->effectslot = effectslots[i];
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Context->AuxiliaryEffectSlotCount++;
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i++;
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list = &(*list)->next;
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}
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}
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}
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else
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alSetError(AL_INVALID_OPERATION);
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}
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alDeleteAuxiliaryEffectSlots(ALsizei n, ALuint *effectslots)
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{
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ALCcontext *Context;
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ALeffectslot *ALAuxiliaryEffectSlot;
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ALsizei i;
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Context = GetContextSuspended();
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if(!Context) return;
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if (n >= 0)
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{
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// Check that all effectslots are valid
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for (i = 0; i < n; i++)
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{
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if (!alIsAuxiliaryEffectSlot(effectslots[i]))
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{
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alSetError(AL_INVALID_NAME);
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break;
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}
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else
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{
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ALAuxiliaryEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslots[i]);
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if(ALAuxiliaryEffectSlot->refcount > 0)
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{
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alSetError(AL_INVALID_NAME);
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break;
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}
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}
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}
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if (i == n)
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{
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// All effectslots are valid
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for (i = 0; i < n; i++)
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{
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// Recheck that the effectslot is valid, because there could be duplicated names
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if (alIsAuxiliaryEffectSlot(effectslots[i]))
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{
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ALeffectslot **list;
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ALAuxiliaryEffectSlot = ((ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslots[i]));
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// Remove Source from list of Sources
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list = &Context->AuxiliaryEffectSlot;
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while(*list && *list != ALAuxiliaryEffectSlot)
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list = &(*list)->next;
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if(*list)
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*list = (*list)->next;
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ALTHUNK_REMOVEENTRY(ALAuxiliaryEffectSlot->effectslot);
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if(ALAuxiliaryEffectSlot->EffectState)
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ALEffect_Destroy(ALAuxiliaryEffectSlot->EffectState);
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memset(ALAuxiliaryEffectSlot, 0, sizeof(ALeffectslot));
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free(ALAuxiliaryEffectSlot);
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Context->AuxiliaryEffectSlotCount--;
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}
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}
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}
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}
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else
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alSetError(AL_INVALID_VALUE);
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ProcessContext(Context);
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}
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ALboolean AL_APIENTRY alIsAuxiliaryEffectSlot(ALuint effectslot)
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{
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ALCcontext *Context;
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ALeffectslot **list;
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Context = GetContextSuspended();
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if(!Context) return AL_FALSE;
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list = &Context->AuxiliaryEffectSlot;
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while(*list && (*list)->effectslot != effectslot)
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list = &(*list)->next;
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ProcessContext(Context);
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return (*list ? AL_TRUE : AL_FALSE);
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}
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ALvoid AL_APIENTRY alAuxiliaryEffectSloti(ALuint effectslot, ALenum param, ALint iValue)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
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switch(param)
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{
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case AL_EFFECTSLOT_EFFECT:
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if(alIsEffect(iValue))
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{
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ALeffect *effect = (ALeffect*)ALTHUNK_LOOKUPENTRY(iValue);
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InitializeEffect(Context, ALEffectSlot, effect);
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}
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else
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alSetError(AL_INVALID_VALUE);
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break;
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case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
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if(iValue == AL_TRUE || iValue == AL_FALSE)
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ALEffectSlot->AuxSendAuto = iValue;
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else
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alSetError(AL_INVALID_VALUE);
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alAuxiliaryEffectSlotiv(ALuint effectslot, ALenum param, ALint *piValues)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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switch(param)
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{
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case AL_EFFECTSLOT_EFFECT:
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case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
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alAuxiliaryEffectSloti(effectslot, param, piValues[0]);
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alAuxiliaryEffectSlotf(ALuint effectslot, ALenum param, ALfloat flValue)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
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switch(param)
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{
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case AL_EFFECTSLOT_GAIN:
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if(flValue >= 0.0f && flValue <= 1.0f)
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ALEffectSlot->Gain = flValue;
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else
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alSetError(AL_INVALID_VALUE);
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alAuxiliaryEffectSlotfv(ALuint effectslot, ALenum param, ALfloat *pflValues)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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switch(param)
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{
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case AL_EFFECTSLOT_GAIN:
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alAuxiliaryEffectSlotf(effectslot, param, pflValues[0]);
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alGetAuxiliaryEffectSloti(ALuint effectslot, ALenum param, ALint *piValue)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
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switch(param)
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{
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case AL_EFFECTSLOT_EFFECT:
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*piValue = ALEffectSlot->effect.effect;
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break;
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case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
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*piValue = ALEffectSlot->AuxSendAuto;
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alGetAuxiliaryEffectSlotiv(ALuint effectslot, ALenum param, ALint *piValues)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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switch(param)
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{
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case AL_EFFECTSLOT_EFFECT:
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case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
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alGetAuxiliaryEffectSloti(effectslot, param, piValues);
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alGetAuxiliaryEffectSlotf(ALuint effectslot, ALenum param, ALfloat *pflValue)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
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switch(param)
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{
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case AL_EFFECTSLOT_GAIN:
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*pflValue = ALEffectSlot->Gain;
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid AL_APIENTRY alGetAuxiliaryEffectSlotfv(ALuint effectslot, ALenum param, ALfloat *pflValues)
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{
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ALCcontext *Context;
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Context = GetContextSuspended();
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if(!Context) return;
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if (alIsAuxiliaryEffectSlot(effectslot))
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{
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switch(param)
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{
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case AL_EFFECTSLOT_GAIN:
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alGetAuxiliaryEffectSlotf(effectslot, param, pflValues);
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break;
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default:
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alSetError(AL_INVALID_ENUM);
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break;
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}
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}
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else
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alSetError(AL_INVALID_NAME);
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ProcessContext(Context);
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}
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static ALvoid InitializeEffect(ALCcontext *Context, ALeffectslot *ALEffectSlot, ALeffect *effect)
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{
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if((!effect) || (effect->type != ALEffectSlot->effect.type))
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{
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ALeffectState *NewState = NULL;
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if(effect)
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{
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if(effect->type == AL_EFFECT_EAXREVERB)
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NewState = EAXVerbCreate(Context);
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else if(effect->type == AL_EFFECT_REVERB)
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NewState = VerbCreate(Context);
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else if(effect->type == AL_EFFECT_ECHO)
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NewState = EchoCreate(Context);
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/* No new state? An error occured.. */
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if(!NewState)
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return;
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}
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if(ALEffectSlot->EffectState)
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ALEffect_Destroy(ALEffectSlot->EffectState);
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ALEffectSlot->EffectState = NewState;
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}
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if(!effect)
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{
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memset(&ALEffectSlot->effect, 0, sizeof(ALEffectSlot->effect));
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return;
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}
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memcpy(&ALEffectSlot->effect, effect, sizeof(*effect));
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ALEffect_Update(ALEffectSlot->EffectState, Context, effect);
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}
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ALvoid ReleaseALAuxiliaryEffectSlots(ALCcontext *Context)
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{
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#ifdef _DEBUG
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if(Context->AuxiliaryEffectSlotCount > 0)
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AL_PRINT("alcDestroyContext(): deleting %d AuxiliaryEffectSlot(s)\n", Context->AuxiliaryEffectSlotCount);
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#endif
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while(Context->AuxiliaryEffectSlot)
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{
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ALeffectslot *temp = Context->AuxiliaryEffectSlot;
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Context->AuxiliaryEffectSlot = Context->AuxiliaryEffectSlot->next;
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// Release effectslot structure
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if(temp->EffectState)
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ALEffect_Destroy(temp->EffectState);
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ALTHUNK_REMOVEENTRY(temp->effectslot);
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memset(temp, 0, sizeof(ALeffectslot));
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free(temp);
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}
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Context->AuxiliaryEffectSlotCount = 0;
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}
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