447 lines
11 KiB
C
447 lines
11 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 "AL/al.h"
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#include "AL/alc.h"
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#include "alMain.h"
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#include "alFilter.h"
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#include "alThunk.h"
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#include "alError.h"
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static void InitFilterParams(ALfilter *filter, ALenum type);
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DECL_VERIFIER(Filter, ALfilter, filter)
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AL_API ALvoid AL_APIENTRY alGenFilters(ALsizei n, ALuint *filters)
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{
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ALCcontext *Context;
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ALsizei i=0;
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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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// Check that enough memory has been allocted in the 'filters' array for n Filters
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if (!IsBadWritePtr((void*)filters, n * sizeof(ALuint)))
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{
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ALfilter *end;
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ALfilter **list = &device->FilterList;
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while(*list)
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list = &(*list)->next;
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end = *list;
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while(i < n)
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{
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*list = calloc(1, sizeof(ALfilter));
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if(!(*list))
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{
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while(end->next)
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{
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ALfilter *temp = end->next;
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end->next = temp->next;
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ALTHUNK_REMOVEENTRY(temp->filter);
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device->FilterCount--;
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free(temp);
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}
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alSetError(Context, AL_OUT_OF_MEMORY);
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break;
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}
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filters[i] = (ALuint)ALTHUNK_ADDENTRY(*list);
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(*list)->filter = filters[i];
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InitFilterParams(*list, AL_FILTER_NULL);
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device->FilterCount++;
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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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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alDeleteFilters(ALsizei n, ALuint *filters)
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{
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ALCcontext *Context;
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ALfilter *ALFilter;
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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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ALCdevice *device = Context->Device;
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// Check that all filters are valid
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for (i = 0; i < n; i++)
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{
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if(!filters[i])
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continue;
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if(!VerifyFilter(device->FilterList, filters[i]))
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{
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alSetError(Context, AL_INVALID_NAME);
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break;
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}
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}
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if (i == n)
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{
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// All filters are valid
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for (i = 0; i < n; i++)
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{
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// Recheck that the filter is valid, because there could be duplicated names
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if((ALFilter=VerifyFilter(device->FilterList, filters[i])) != NULL)
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{
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ALfilter **list;
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// Remove Source from list of Sources
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list = &device->FilterList;
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while(*list && *list != ALFilter)
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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(ALFilter->filter);
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memset(ALFilter, 0, sizeof(ALfilter));
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free(ALFilter);
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device->FilterCount--;
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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(Context, AL_INVALID_VALUE);
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ProcessContext(Context);
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}
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AL_API ALboolean AL_APIENTRY alIsFilter(ALuint filter)
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{
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ALCcontext *Context;
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ALboolean result = AL_TRUE;
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Context = GetContextSuspended();
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if(!Context) return AL_FALSE;
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if(filter)
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result = (VerifyFilter(Context->Device->FilterList, filter) ?
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AL_TRUE : AL_FALSE);
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ProcessContext(Context);
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return result;
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}
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AL_API ALvoid AL_APIENTRY alFilteri(ALuint filter, ALenum param, ALint iValue)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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ALfilter *ALFilter;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if((ALFilter=VerifyFilter(Device->FilterList, filter)) != NULL)
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{
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switch(param)
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{
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case AL_FILTER_TYPE:
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if(iValue == AL_FILTER_NULL ||
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iValue == AL_FILTER_LOWPASS)
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InitFilterParams(ALFilter, iValue);
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else
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alSetError(Context, AL_INVALID_VALUE);
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break;
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default:
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alSetError(Context, 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(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alFilteriv(ALuint filter, ALenum param, ALint *piValues)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if(VerifyFilter(Device->FilterList, filter) != NULL)
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{
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switch(param)
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{
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case AL_FILTER_TYPE:
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alFilteri(filter, param, piValues[0]);
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break;
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default:
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alSetError(Context, 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(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alFilterf(ALuint filter, ALenum param, ALfloat flValue)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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ALfilter *ALFilter;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if((ALFilter=VerifyFilter(Device->FilterList, filter)) != NULL)
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{
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switch(ALFilter->type)
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{
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case AL_FILTER_LOWPASS:
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switch(param)
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{
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case AL_LOWPASS_GAIN:
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if(flValue >= 0.0f && flValue <= 1.0f)
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ALFilter->Gain = flValue;
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else
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alSetError(Context, AL_INVALID_VALUE);
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break;
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case AL_LOWPASS_GAINHF:
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if(flValue >= 0.0f && flValue <= 1.0f)
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ALFilter->GainHF = flValue;
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else
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alSetError(Context, AL_INVALID_VALUE);
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break;
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default:
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alSetError(Context, AL_INVALID_ENUM);
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break;
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}
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break;
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default:
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alSetError(Context, 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(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alFilterfv(ALuint filter, ALenum param, ALfloat *pflValues)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if(VerifyFilter(Device->FilterList, filter) != NULL)
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{
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switch(param)
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{
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default:
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alFilterf(filter, param, pflValues[0]);
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break;
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}
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}
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else
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alSetError(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilteri(ALuint filter, ALenum param, ALint *piValue)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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ALfilter *ALFilter;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if((ALFilter=VerifyFilter(Device->FilterList, filter)) != NULL)
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{
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switch(param)
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{
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case AL_FILTER_TYPE:
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*piValue = ALFilter->type;
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break;
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default:
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alSetError(Context, 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(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilteriv(ALuint filter, ALenum param, ALint *piValues)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if(VerifyFilter(Device->FilterList, filter) != NULL)
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{
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switch(param)
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{
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case AL_FILTER_TYPE:
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alGetFilteri(filter, param, piValues);
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break;
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default:
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alSetError(Context, 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(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilterf(ALuint filter, ALenum param, ALfloat *pflValue)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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ALfilter *ALFilter;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if((ALFilter=VerifyFilter(Device->FilterList, filter)) != NULL)
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{
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switch(ALFilter->type)
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{
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case AL_FILTER_LOWPASS:
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switch(param)
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{
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case AL_LOWPASS_GAIN:
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*pflValue = ALFilter->Gain;
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break;
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case AL_LOWPASS_GAINHF:
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*pflValue = ALFilter->GainHF;
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break;
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default:
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alSetError(Context, AL_INVALID_ENUM);
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break;
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}
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break;
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default:
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alSetError(Context, 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(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilterfv(ALuint filter, ALenum param, ALfloat *pflValues)
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{
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ALCcontext *Context;
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ALCdevice *Device;
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Context = GetContextSuspended();
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if(!Context) return;
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Device = Context->Device;
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if(VerifyFilter(Device->FilterList, filter) != NULL)
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{
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switch(param)
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{
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default:
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alGetFilterf(filter, param, pflValues);
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break;
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}
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}
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else
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alSetError(Context, AL_INVALID_NAME);
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ProcessContext(Context);
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}
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ALvoid ReleaseALFilters(ALCdevice *device)
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{
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while(device->FilterList)
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{
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ALfilter *temp = device->FilterList;
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device->FilterList = temp->next;
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// Release filter structure
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ALTHUNK_REMOVEENTRY(temp->filter);
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memset(temp, 0, sizeof(ALfilter));
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free(temp);
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}
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device->FilterCount = 0;
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}
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static void InitFilterParams(ALfilter *filter, ALenum type)
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{
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filter->type = type;
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filter->Gain = 1.0;
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filter->GainHF = 1.0;
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}
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