78cb70a5f9
The latter is a bit more descriptive as f0 is often used to denote the reference frequency of a filter, so f0norm indicates the normalized reference frequency (ref_freq / sample_rate).
684 lines
22 KiB
C
684 lines
22 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.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 "alMain.h"
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#include "alu.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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extern inline void LockFiltersRead(ALCdevice *device);
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extern inline void UnlockFiltersRead(ALCdevice *device);
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extern inline void LockFiltersWrite(ALCdevice *device);
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extern inline void UnlockFiltersWrite(ALCdevice *device);
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extern inline struct ALfilter *LookupFilter(ALCdevice *device, ALuint id);
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extern inline struct ALfilter *RemoveFilter(ALCdevice *device, ALuint id);
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extern inline void ALfilterState_clear(ALfilterState *filter);
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extern inline void ALfilterState_copyParams(ALfilterState *restrict dst, const ALfilterState *restrict src);
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extern inline void ALfilterState_processPassthru(ALfilterState *filter, const ALfloat *restrict src, ALsizei numsamples);
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extern inline ALfloat calc_rcpQ_from_slope(ALfloat gain, ALfloat slope);
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extern inline ALfloat calc_rcpQ_from_bandwidth(ALfloat f0norm, ALfloat bandwidth);
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static void InitFilterParams(ALfilter *filter, ALenum type);
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AL_API ALvoid AL_APIENTRY alGenFilters(ALsizei n, ALuint *filters)
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{
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ALCdevice *device;
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ALCcontext *context;
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ALsizei cur = 0;
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ALenum err;
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context = GetContextRef();
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if(!context) return;
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if(!(n >= 0))
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SET_ERROR_AND_GOTO(context, AL_INVALID_VALUE, done);
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device = context->Device;
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for(cur = 0;cur < n;cur++)
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{
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ALfilter *filter = al_calloc(16, sizeof(ALfilter));
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if(!filter)
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{
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alDeleteFilters(cur, filters);
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SET_ERROR_AND_GOTO(context, AL_OUT_OF_MEMORY, done);
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}
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InitFilterParams(filter, AL_FILTER_NULL);
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err = NewThunkEntry(&filter->id);
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if(err == AL_NO_ERROR)
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err = InsertUIntMapEntry(&device->FilterMap, filter->id, filter);
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if(err != AL_NO_ERROR)
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{
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FreeThunkEntry(filter->id);
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memset(filter, 0, sizeof(ALfilter));
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al_free(filter);
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alDeleteFilters(cur, filters);
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SET_ERROR_AND_GOTO(context, err, done);
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}
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filters[cur] = filter->id;
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}
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done:
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ALCcontext_DecRef(context);
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}
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AL_API ALvoid AL_APIENTRY alDeleteFilters(ALsizei n, const ALuint *filters)
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{
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ALCdevice *device;
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ALCcontext *context;
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ALfilter *filter;
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ALsizei i;
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context = GetContextRef();
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if(!context) return;
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device = context->Device;
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LockFiltersWrite(device);
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if(!(n >= 0))
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SET_ERROR_AND_GOTO(context, AL_INVALID_VALUE, done);
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for(i = 0;i < n;i++)
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{
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if(filters[i] && LookupFilter(device, filters[i]) == NULL)
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SET_ERROR_AND_GOTO(context, AL_INVALID_NAME, done);
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}
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for(i = 0;i < n;i++)
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{
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if((filter=RemoveFilter(device, filters[i])) == NULL)
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continue;
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FreeThunkEntry(filter->id);
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memset(filter, 0, sizeof(*filter));
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al_free(filter);
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}
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done:
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UnlockFiltersWrite(device);
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ALCcontext_DecRef(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;
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Context = GetContextRef();
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if(!Context) return AL_FALSE;
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LockFiltersRead(Context->Device);
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result = ((!filter || LookupFilter(Context->Device, filter)) ?
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AL_TRUE : AL_FALSE);
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UnlockFiltersRead(Context->Device);
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ALCcontext_DecRef(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 value)
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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 = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersWrite(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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if(param == AL_FILTER_TYPE)
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{
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if(value == AL_FILTER_NULL || value == AL_FILTER_LOWPASS ||
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value == AL_FILTER_HIGHPASS || value == AL_FILTER_BANDPASS)
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InitFilterParams(ALFilter, value);
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else
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alSetError(Context, AL_INVALID_VALUE);
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}
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,setParami)(Context, param, value);
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}
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}
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UnlockFiltersWrite(Device);
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ALCcontext_DecRef(Context);
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}
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AL_API ALvoid AL_APIENTRY alFilteriv(ALuint filter, ALenum param, const ALint *values)
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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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switch(param)
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{
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case AL_FILTER_TYPE:
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alFilteri(filter, param, values[0]);
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return;
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}
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Context = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersWrite(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,setParamiv)(Context, param, values);
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}
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UnlockFiltersWrite(Device);
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ALCcontext_DecRef(Context);
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}
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AL_API ALvoid AL_APIENTRY alFilterf(ALuint filter, ALenum param, ALfloat value)
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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 = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersWrite(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,setParamf)(Context, param, value);
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}
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UnlockFiltersWrite(Device);
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ALCcontext_DecRef(Context);
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}
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AL_API ALvoid AL_APIENTRY alFilterfv(ALuint filter, ALenum param, const ALfloat *values)
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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 = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersWrite(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,setParamfv)(Context, param, values);
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}
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UnlockFiltersWrite(Device);
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ALCcontext_DecRef(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilteri(ALuint filter, ALenum param, ALint *value)
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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 = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersRead(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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if(param == AL_FILTER_TYPE)
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*value = ALFilter->type;
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,getParami)(Context, param, value);
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}
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}
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UnlockFiltersRead(Device);
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ALCcontext_DecRef(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilteriv(ALuint filter, ALenum param, ALint *values)
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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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switch(param)
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{
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case AL_FILTER_TYPE:
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alGetFilteri(filter, param, values);
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return;
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}
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Context = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersRead(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,getParamiv)(Context, param, values);
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}
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UnlockFiltersRead(Device);
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ALCcontext_DecRef(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilterf(ALuint filter, ALenum param, ALfloat *value)
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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 = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersRead(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,getParamf)(Context, param, value);
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}
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UnlockFiltersRead(Device);
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ALCcontext_DecRef(Context);
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}
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AL_API ALvoid AL_APIENTRY alGetFilterfv(ALuint filter, ALenum param, ALfloat *values)
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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 = GetContextRef();
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if(!Context) return;
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Device = Context->Device;
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LockFiltersRead(Device);
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if((ALFilter=LookupFilter(Device, filter)) == NULL)
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alSetError(Context, AL_INVALID_NAME);
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else
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{
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/* Call the appropriate handler */
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V(ALFilter,getParamfv)(Context, param, values);
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}
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UnlockFiltersRead(Device);
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ALCcontext_DecRef(Context);
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}
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void ALfilterState_setParams(ALfilterState *filter, ALfilterType type, ALfloat gain, ALfloat f0norm, ALfloat rcpQ)
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{
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ALfloat alpha, sqrtgain_alpha_2;
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ALfloat w0, sin_w0, cos_w0;
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ALfloat a[3] = { 1.0f, 0.0f, 0.0f };
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ALfloat b[3] = { 1.0f, 0.0f, 0.0f };
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// Limit gain to -100dB
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assert(gain > 0.00001f);
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w0 = F_TAU * f0norm;
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sin_w0 = sinf(w0);
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cos_w0 = cosf(w0);
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alpha = sin_w0/2.0f * rcpQ;
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/* Calculate filter coefficients depending on filter type */
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switch(type)
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{
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case ALfilterType_HighShelf:
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sqrtgain_alpha_2 = 2.0f * sqrtf(gain) * alpha;
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b[0] = gain*((gain+1.0f) + (gain-1.0f)*cos_w0 + sqrtgain_alpha_2);
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b[1] = -2.0f*gain*((gain-1.0f) + (gain+1.0f)*cos_w0 );
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b[2] = gain*((gain+1.0f) + (gain-1.0f)*cos_w0 - sqrtgain_alpha_2);
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a[0] = (gain+1.0f) - (gain-1.0f)*cos_w0 + sqrtgain_alpha_2;
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a[1] = 2.0f* ((gain-1.0f) - (gain+1.0f)*cos_w0 );
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a[2] = (gain+1.0f) - (gain-1.0f)*cos_w0 - sqrtgain_alpha_2;
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break;
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case ALfilterType_LowShelf:
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sqrtgain_alpha_2 = 2.0f * sqrtf(gain) * alpha;
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b[0] = gain*((gain+1.0f) - (gain-1.0f)*cos_w0 + sqrtgain_alpha_2);
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b[1] = 2.0f*gain*((gain-1.0f) - (gain+1.0f)*cos_w0 );
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b[2] = gain*((gain+1.0f) - (gain-1.0f)*cos_w0 - sqrtgain_alpha_2);
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a[0] = (gain+1.0f) + (gain-1.0f)*cos_w0 + sqrtgain_alpha_2;
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a[1] = -2.0f* ((gain-1.0f) + (gain+1.0f)*cos_w0 );
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a[2] = (gain+1.0f) + (gain-1.0f)*cos_w0 - sqrtgain_alpha_2;
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break;
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case ALfilterType_Peaking:
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gain = sqrtf(gain);
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b[0] = 1.0f + alpha * gain;
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b[1] = -2.0f * cos_w0;
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b[2] = 1.0f - alpha * gain;
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a[0] = 1.0f + alpha / gain;
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a[1] = -2.0f * cos_w0;
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a[2] = 1.0f - alpha / gain;
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break;
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case ALfilterType_LowPass:
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b[0] = (1.0f - cos_w0) / 2.0f;
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b[1] = 1.0f - cos_w0;
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b[2] = (1.0f - cos_w0) / 2.0f;
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a[0] = 1.0f + alpha;
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a[1] = -2.0f * cos_w0;
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a[2] = 1.0f - alpha;
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break;
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case ALfilterType_HighPass:
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b[0] = (1.0f + cos_w0) / 2.0f;
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b[1] = -(1.0f + cos_w0);
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b[2] = (1.0f + cos_w0) / 2.0f;
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a[0] = 1.0f + alpha;
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a[1] = -2.0f * cos_w0;
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a[2] = 1.0f - alpha;
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break;
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case ALfilterType_BandPass:
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b[0] = alpha;
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b[1] = 0;
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b[2] = -alpha;
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a[0] = 1.0f + alpha;
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a[1] = -2.0f * cos_w0;
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a[2] = 1.0f - alpha;
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break;
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}
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filter->a1 = a[1] / a[0];
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filter->a2 = a[2] / a[0];
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filter->b0 = b[0] / a[0];
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filter->b1 = b[1] / a[0];
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filter->b2 = b[2] / a[0];
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}
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static void ALlowpass_setParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint UNUSED(val))
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{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
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static void ALlowpass_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), const ALint *UNUSED(vals))
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{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
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static void ALlowpass_setParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat val)
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{
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switch(param)
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{
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case AL_LOWPASS_GAIN:
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if(!(val >= AL_LOWPASS_MIN_GAIN && val <= AL_LOWPASS_MAX_GAIN))
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SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
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filter->Gain = val;
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break;
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case AL_LOWPASS_GAINHF:
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if(!(val >= AL_LOWPASS_MIN_GAINHF && val <= AL_LOWPASS_MAX_GAINHF))
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SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
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filter->GainHF = val;
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break;
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default:
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SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
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}
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}
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static void ALlowpass_setParamfv(ALfilter *filter, ALCcontext *context, ALenum param, const ALfloat *vals)
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{ ALlowpass_setParamf(filter, context, param, vals[0]); }
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static void ALlowpass_getParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(val))
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{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
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static void ALlowpass_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(vals))
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{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
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static void ALlowpass_getParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *val)
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{
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switch(param)
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{
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case AL_LOWPASS_GAIN:
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*val = filter->Gain;
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break;
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case AL_LOWPASS_GAINHF:
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*val = filter->GainHF;
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break;
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default:
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SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
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}
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}
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static void ALlowpass_getParamfv(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *vals)
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{ ALlowpass_getParamf(filter, context, param, vals); }
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DEFINE_ALFILTER_VTABLE(ALlowpass);
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static void ALhighpass_setParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint UNUSED(val))
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{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
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static void ALhighpass_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), const ALint *UNUSED(vals))
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{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
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static void ALhighpass_setParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat val)
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{
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switch(param)
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{
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case AL_HIGHPASS_GAIN:
|
|
if(!(val >= AL_HIGHPASS_MIN_GAIN && val <= AL_HIGHPASS_MAX_GAIN))
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
|
|
filter->Gain = val;
|
|
break;
|
|
|
|
case AL_HIGHPASS_GAINLF:
|
|
if(!(val >= AL_HIGHPASS_MIN_GAINLF && val <= AL_HIGHPASS_MAX_GAINLF))
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
|
|
filter->GainLF = val;
|
|
break;
|
|
|
|
default:
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
|
|
}
|
|
}
|
|
static void ALhighpass_setParamfv(ALfilter *filter, ALCcontext *context, ALenum param, const ALfloat *vals)
|
|
{ ALhighpass_setParamf(filter, context, param, vals[0]); }
|
|
|
|
static void ALhighpass_getParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(val))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALhighpass_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(vals))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALhighpass_getParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *val)
|
|
{
|
|
switch(param)
|
|
{
|
|
case AL_HIGHPASS_GAIN:
|
|
*val = filter->Gain;
|
|
break;
|
|
|
|
case AL_HIGHPASS_GAINLF:
|
|
*val = filter->GainLF;
|
|
break;
|
|
|
|
default:
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
|
|
}
|
|
}
|
|
static void ALhighpass_getParamfv(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *vals)
|
|
{ ALhighpass_getParamf(filter, context, param, vals); }
|
|
|
|
DEFINE_ALFILTER_VTABLE(ALhighpass);
|
|
|
|
|
|
static void ALbandpass_setParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint UNUSED(val))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALbandpass_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), const ALint *UNUSED(vals))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALbandpass_setParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat val)
|
|
{
|
|
switch(param)
|
|
{
|
|
case AL_BANDPASS_GAIN:
|
|
if(!(val >= AL_BANDPASS_MIN_GAIN && val <= AL_BANDPASS_MAX_GAIN))
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
|
|
filter->Gain = val;
|
|
break;
|
|
|
|
case AL_BANDPASS_GAINHF:
|
|
if(!(val >= AL_BANDPASS_MIN_GAINHF && val <= AL_BANDPASS_MAX_GAINHF))
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
|
|
filter->GainHF = val;
|
|
break;
|
|
|
|
case AL_BANDPASS_GAINLF:
|
|
if(!(val >= AL_BANDPASS_MIN_GAINLF && val <= AL_BANDPASS_MAX_GAINLF))
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
|
|
filter->GainLF = val;
|
|
break;
|
|
|
|
default:
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
|
|
}
|
|
}
|
|
static void ALbandpass_setParamfv(ALfilter *filter, ALCcontext *context, ALenum param, const ALfloat *vals)
|
|
{ ALbandpass_setParamf(filter, context, param, vals[0]); }
|
|
|
|
static void ALbandpass_getParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(val))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALbandpass_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(vals))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALbandpass_getParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *val)
|
|
{
|
|
switch(param)
|
|
{
|
|
case AL_BANDPASS_GAIN:
|
|
*val = filter->Gain;
|
|
break;
|
|
|
|
case AL_BANDPASS_GAINHF:
|
|
*val = filter->GainHF;
|
|
break;
|
|
|
|
case AL_BANDPASS_GAINLF:
|
|
*val = filter->GainLF;
|
|
break;
|
|
|
|
default:
|
|
SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
|
|
}
|
|
}
|
|
static void ALbandpass_getParamfv(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *vals)
|
|
{ ALbandpass_getParamf(filter, context, param, vals); }
|
|
|
|
DEFINE_ALFILTER_VTABLE(ALbandpass);
|
|
|
|
|
|
static void ALnullfilter_setParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint UNUSED(val))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALnullfilter_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), const ALint *UNUSED(vals))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALnullfilter_setParamf(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALfloat UNUSED(val))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALnullfilter_setParamfv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), const ALfloat *UNUSED(vals))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
|
|
static void ALnullfilter_getParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(val))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALnullfilter_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(vals))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALnullfilter_getParamf(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALfloat *UNUSED(val))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
static void ALnullfilter_getParamfv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum UNUSED(param), ALfloat *UNUSED(vals))
|
|
{ SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
|
|
|
|
DEFINE_ALFILTER_VTABLE(ALnullfilter);
|
|
|
|
|
|
ALvoid ReleaseALFilters(ALCdevice *device)
|
|
{
|
|
ALsizei i;
|
|
for(i = 0;i < device->FilterMap.size;i++)
|
|
{
|
|
ALfilter *temp = device->FilterMap.values[i];
|
|
device->FilterMap.values[i] = NULL;
|
|
|
|
// Release filter structure
|
|
FreeThunkEntry(temp->id);
|
|
memset(temp, 0, sizeof(ALfilter));
|
|
al_free(temp);
|
|
}
|
|
}
|
|
|
|
|
|
static void InitFilterParams(ALfilter *filter, ALenum type)
|
|
{
|
|
if(type == AL_FILTER_LOWPASS)
|
|
{
|
|
filter->Gain = AL_LOWPASS_DEFAULT_GAIN;
|
|
filter->GainHF = AL_LOWPASS_DEFAULT_GAINHF;
|
|
filter->HFReference = LOWPASSFREQREF;
|
|
filter->GainLF = 1.0f;
|
|
filter->LFReference = HIGHPASSFREQREF;
|
|
filter->vtbl = &ALlowpass_vtable;
|
|
}
|
|
else if(type == AL_FILTER_HIGHPASS)
|
|
{
|
|
filter->Gain = AL_HIGHPASS_DEFAULT_GAIN;
|
|
filter->GainHF = 1.0f;
|
|
filter->HFReference = LOWPASSFREQREF;
|
|
filter->GainLF = AL_HIGHPASS_DEFAULT_GAINLF;
|
|
filter->LFReference = HIGHPASSFREQREF;
|
|
filter->vtbl = &ALhighpass_vtable;
|
|
}
|
|
else if(type == AL_FILTER_BANDPASS)
|
|
{
|
|
filter->Gain = AL_BANDPASS_DEFAULT_GAIN;
|
|
filter->GainHF = AL_BANDPASS_DEFAULT_GAINHF;
|
|
filter->HFReference = LOWPASSFREQREF;
|
|
filter->GainLF = AL_BANDPASS_DEFAULT_GAINLF;
|
|
filter->LFReference = HIGHPASSFREQREF;
|
|
filter->vtbl = &ALbandpass_vtable;
|
|
}
|
|
else
|
|
{
|
|
filter->Gain = 1.0f;
|
|
filter->GainHF = 1.0f;
|
|
filter->HFReference = LOWPASSFREQREF;
|
|
filter->GainLF = 1.0f;
|
|
filter->LFReference = HIGHPASSFREQREF;
|
|
filter->vtbl = &ALnullfilter_vtable;
|
|
}
|
|
filter->type = type;
|
|
}
|