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openal-soft/OpenAL32/alFilter.c
Chris Robinson f16ece6048 Move some inline functions into a header instead of copying them 
Unfortunately does not include the Lookup* functions, which need the full type
declaration to offset the pointer.
2018-01-27 21:16:24 -08:00

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/**
* OpenAL cross platform audio library
* Copyright (C) 1999-2007 by authors.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include <stdlib.h>
#include "alMain.h"
#include "alu.h"
#include "alFilter.h"
#include "alThunk.h"
#include "alError.h"
extern inline void LockFilterList(ALCdevice *device);
extern inline void UnlockFilterList(ALCdevice *device);
extern inline void ALfilterState_clear(ALfilterState *filter);
extern inline void ALfilterState_copyParams(ALfilterState *restrict dst, const ALfilterState *restrict src);
extern inline void ALfilterState_processPassthru(ALfilterState *filter, const ALfloat *restrict src, ALsizei numsamples);
extern inline ALfloat calc_rcpQ_from_slope(ALfloat gain, ALfloat slope);
extern inline ALfloat calc_rcpQ_from_bandwidth(ALfloat f0norm, ALfloat bandwidth);
static ALfilter *AllocFilter(ALCcontext *context);
static void FreeFilter(ALCdevice *device, ALfilter *filter);
static void InitFilterParams(ALfilter *filter, ALenum type);
static inline ALfilter *LookupFilter(ALCdevice *device, ALuint id)
{
FilterSubList *sublist;
ALuint lidx = (id-1) >> 6;
ALsizei slidx = (id-1) & 0x3f;
if(UNLIKELY(lidx >= VECTOR_SIZE(device->FilterList)))
return NULL;
sublist = &VECTOR_ELEM(device->FilterList, lidx);
if(UNLIKELY(sublist->FreeMask & (U64(1)<<slidx)))
return NULL;
return sublist->Filters + slidx;
}
AL_API ALvoid AL_APIENTRY alGenFilters(ALsizei n, ALuint *filters)
{
ALCcontext *context;
ALsizei cur = 0;
context = GetContextRef();
if(!context) return;
if(!(n >= 0))
alSetError(context, AL_INVALID_VALUE, "Generating %d filters", n);
else for(cur = 0;cur < n;cur++)
{
ALfilter *filter = AllocFilter(context);
if(!filter)
{
alDeleteFilters(cur, filters);
break;
}
filters[cur] = filter->id;
}
ALCcontext_DecRef(context);
}
AL_API ALvoid AL_APIENTRY alDeleteFilters(ALsizei n, const ALuint *filters)
{
ALCdevice *device;
ALCcontext *context;
ALfilter *filter;
ALsizei i;
context = GetContextRef();
if(!context) return;
device = context->Device;
LockFilterList(device);
if(!(n >= 0))
SETERR_GOTO(context, AL_INVALID_VALUE, done, "Deleting %d filters", n);
for(i = 0;i < n;i++)
{
if(filters[i] && LookupFilter(device, filters[i]) == NULL)
SETERR_GOTO(context, AL_INVALID_NAME, done, "Invalid filter ID %u", filters[i]);
}
for(i = 0;i < n;i++)
{
if((filter=LookupFilter(device, filters[i])) != NULL)
FreeFilter(device, filter);
}
done:
UnlockFilterList(device);
ALCcontext_DecRef(context);
}
AL_API ALboolean AL_APIENTRY alIsFilter(ALuint filter)
{
ALCcontext *Context;
ALboolean result;
Context = GetContextRef();
if(!Context) return AL_FALSE;
LockFilterList(Context->Device);
result = ((!filter || LookupFilter(Context->Device, filter)) ?
AL_TRUE : AL_FALSE);
UnlockFilterList(Context->Device);
ALCcontext_DecRef(Context);
return result;
}
AL_API ALvoid AL_APIENTRY alFilteri(ALuint filter, ALenum param, ALint value)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
if(param == AL_FILTER_TYPE)
{
if(value == AL_FILTER_NULL || value == AL_FILTER_LOWPASS ||
value == AL_FILTER_HIGHPASS || value == AL_FILTER_BANDPASS)
InitFilterParams(ALFilter, value);
else
alSetError(Context, AL_INVALID_VALUE, "Invalid filter type 0x%04x", value);
}
else
{
/* Call the appropriate handler */
V(ALFilter,setParami)(Context, param, value);
}
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
AL_API ALvoid AL_APIENTRY alFilteriv(ALuint filter, ALenum param, const ALint *values)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
switch(param)
{
case AL_FILTER_TYPE:
alFilteri(filter, param, values[0]);
return;
}
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
/* Call the appropriate handler */
V(ALFilter,setParamiv)(Context, param, values);
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
AL_API ALvoid AL_APIENTRY alFilterf(ALuint filter, ALenum param, ALfloat value)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
/* Call the appropriate handler */
V(ALFilter,setParamf)(Context, param, value);
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
AL_API ALvoid AL_APIENTRY alFilterfv(ALuint filter, ALenum param, const ALfloat *values)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
/* Call the appropriate handler */
V(ALFilter,setParamfv)(Context, param, values);
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
AL_API ALvoid AL_APIENTRY alGetFilteri(ALuint filter, ALenum param, ALint *value)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
if(param == AL_FILTER_TYPE)
*value = ALFilter->type;
else
{
/* Call the appropriate handler */
V(ALFilter,getParami)(Context, param, value);
}
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
AL_API ALvoid AL_APIENTRY alGetFilteriv(ALuint filter, ALenum param, ALint *values)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
switch(param)
{
case AL_FILTER_TYPE:
alGetFilteri(filter, param, values);
return;
}
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
/* Call the appropriate handler */
V(ALFilter,getParamiv)(Context, param, values);
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
AL_API ALvoid AL_APIENTRY alGetFilterf(ALuint filter, ALenum param, ALfloat *value)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
/* Call the appropriate handler */
V(ALFilter,getParamf)(Context, param, value);
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
AL_API ALvoid AL_APIENTRY alGetFilterfv(ALuint filter, ALenum param, ALfloat *values)
{
ALCcontext *Context;
ALCdevice *Device;
ALfilter *ALFilter;
Context = GetContextRef();
if(!Context) return;
Device = Context->Device;
LockFilterList(Device);
if((ALFilter=LookupFilter(Device, filter)) == NULL)
alSetError(Context, AL_INVALID_NAME, "Invalid filter ID %u", filter);
else
{
/* Call the appropriate handler */
V(ALFilter,getParamfv)(Context, param, values);
}
UnlockFilterList(Device);
ALCcontext_DecRef(Context);
}
void ALfilterState_setParams(ALfilterState *filter, ALfilterType type, ALfloat gain, ALfloat f0norm, ALfloat rcpQ)
{
ALfloat alpha, sqrtgain_alpha_2;
ALfloat w0, sin_w0, cos_w0;
ALfloat a[3] = { 1.0f, 0.0f, 0.0f };
ALfloat b[3] = { 1.0f, 0.0f, 0.0f };
// Limit gain to -100dB
assert(gain > 0.00001f);
w0 = F_TAU * f0norm;
sin_w0 = sinf(w0);
cos_w0 = cosf(w0);
alpha = sin_w0/2.0f * rcpQ;
/* Calculate filter coefficients depending on filter type */
switch(type)
{
case ALfilterType_HighShelf:
sqrtgain_alpha_2 = 2.0f * sqrtf(gain) * alpha;
b[0] = gain*((gain+1.0f) + (gain-1.0f)*cos_w0 + sqrtgain_alpha_2);
b[1] = -2.0f*gain*((gain-1.0f) + (gain+1.0f)*cos_w0 );
b[2] = gain*((gain+1.0f) + (gain-1.0f)*cos_w0 - sqrtgain_alpha_2);
a[0] = (gain+1.0f) - (gain-1.0f)*cos_w0 + sqrtgain_alpha_2;
a[1] = 2.0f* ((gain-1.0f) - (gain+1.0f)*cos_w0 );
a[2] = (gain+1.0f) - (gain-1.0f)*cos_w0 - sqrtgain_alpha_2;
break;
case ALfilterType_LowShelf:
sqrtgain_alpha_2 = 2.0f * sqrtf(gain) * alpha;
b[0] = gain*((gain+1.0f) - (gain-1.0f)*cos_w0 + sqrtgain_alpha_2);
b[1] = 2.0f*gain*((gain-1.0f) - (gain+1.0f)*cos_w0 );
b[2] = gain*((gain+1.0f) - (gain-1.0f)*cos_w0 - sqrtgain_alpha_2);
a[0] = (gain+1.0f) + (gain-1.0f)*cos_w0 + sqrtgain_alpha_2;
a[1] = -2.0f* ((gain-1.0f) + (gain+1.0f)*cos_w0 );
a[2] = (gain+1.0f) + (gain-1.0f)*cos_w0 - sqrtgain_alpha_2;
break;
case ALfilterType_Peaking:
gain = sqrtf(gain);
b[0] = 1.0f + alpha * gain;
b[1] = -2.0f * cos_w0;
b[2] = 1.0f - alpha * gain;
a[0] = 1.0f + alpha / gain;
a[1] = -2.0f * cos_w0;
a[2] = 1.0f - alpha / gain;
break;
case ALfilterType_LowPass:
b[0] = (1.0f - cos_w0) / 2.0f;
b[1] = 1.0f - cos_w0;
b[2] = (1.0f - cos_w0) / 2.0f;
a[0] = 1.0f + alpha;
a[1] = -2.0f * cos_w0;
a[2] = 1.0f - alpha;
break;
case ALfilterType_HighPass:
b[0] = (1.0f + cos_w0) / 2.0f;
b[1] = -(1.0f + cos_w0);
b[2] = (1.0f + cos_w0) / 2.0f;
a[0] = 1.0f + alpha;
a[1] = -2.0f * cos_w0;
a[2] = 1.0f - alpha;
break;
case ALfilterType_BandPass:
b[0] = alpha;
b[1] = 0;
b[2] = -alpha;
a[0] = 1.0f + alpha;
a[1] = -2.0f * cos_w0;
a[2] = 1.0f - alpha;
break;
}
filter->a1 = a[1] / a[0];
filter->a2 = a[2] / a[0];
filter->b0 = b[0] / a[0];
filter->b1 = b[1] / a[0];
filter->b2 = b[2] / a[0];
}
static void ALlowpass_setParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid low-pass integer property 0x%04x", param); }
static void ALlowpass_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, const ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid low-pass integer-vector property 0x%04x", param); }
static void ALlowpass_setParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat val)
{
switch(param)
{
case AL_LOWPASS_GAIN:
if(!(val >= AL_LOWPASS_MIN_GAIN && val <= AL_LOWPASS_MAX_GAIN))
SETERR_RETURN(context, AL_INVALID_VALUE,, "Low-pass gain %f out of range", val);
filter->Gain = val;
break;
case AL_LOWPASS_GAINHF:
if(!(val >= AL_LOWPASS_MIN_GAINHF && val <= AL_LOWPASS_MAX_GAINHF))
SETERR_RETURN(context, AL_INVALID_VALUE,, "Low-pass gainhf %f out of range", val);
filter->GainHF = val;
break;
default:
alSetError(context, AL_INVALID_ENUM, "Invalid low-pass float property 0x%04x", param);
}
}
static void ALlowpass_setParamfv(ALfilter *filter, ALCcontext *context, ALenum param, const ALfloat *vals)
{ ALlowpass_setParamf(filter, context, param, vals[0]); }
static void ALlowpass_getParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint *UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid low-pass integer property 0x%04x", param); }
static void ALlowpass_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid low-pass integer-vector property 0x%04x", param); }
static void ALlowpass_getParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *val)
{
switch(param)
{
case AL_LOWPASS_GAIN:
*val = filter->Gain;
break;
case AL_LOWPASS_GAINHF:
*val = filter->GainHF;
break;
default:
alSetError(context, AL_INVALID_ENUM, "Invalid low-pass float property 0x%04x", param);
}
}
static void ALlowpass_getParamfv(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat *vals)
{ ALlowpass_getParamf(filter, context, param, vals); }
DEFINE_ALFILTER_VTABLE(ALlowpass);
static void ALhighpass_setParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid high-pass integer property 0x%04x", param); }
static void ALhighpass_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, const ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid high-pass integer-vector property 0x%04x", param); }
static void ALhighpass_setParamf(ALfilter *filter, ALCcontext *context, ALenum param, ALfloat val)
{
switch(param)
{
case AL_HIGHPASS_GAIN:
if(!(val >= AL_HIGHPASS_MIN_GAIN && val <= AL_HIGHPASS_MAX_GAIN))
SETERR_RETURN(context, AL_INVALID_VALUE,, "High-pass gain out of range");
filter->Gain = val;
break;
case AL_HIGHPASS_GAINLF:
if(!(val >= AL_HIGHPASS_MIN_GAINLF && val <= AL_HIGHPASS_MAX_GAINLF))
SETERR_RETURN(context, AL_INVALID_VALUE,, "High-pass gainlf out of range");
filter->GainLF = val;
break;
default:
alSetError(context, AL_INVALID_ENUM, "Invalid high-pass float property 0x%04x", param);
}
}
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 param, ALint *UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid high-pass integer property 0x%04x", param); }
static void ALhighpass_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid high-pass integer-vector property 0x%04x", param); }
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:
alSetError(context, AL_INVALID_ENUM, "Invalid high-pass float property 0x%04x", param);
}
}
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 param, ALint UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid band-pass integer property 0x%04x", param); }
static void ALbandpass_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, const ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid band-pass integer-vector property 0x%04x", param); }
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))
SETERR_RETURN(context, AL_INVALID_VALUE,, "Band-pass gain out of range");
filter->Gain = val;
break;
case AL_BANDPASS_GAINHF:
if(!(val >= AL_BANDPASS_MIN_GAINHF && val <= AL_BANDPASS_MAX_GAINHF))
SETERR_RETURN(context, AL_INVALID_VALUE,, "Band-pass gainhf out of range");
filter->GainHF = val;
break;
case AL_BANDPASS_GAINLF:
if(!(val >= AL_BANDPASS_MIN_GAINLF && val <= AL_BANDPASS_MAX_GAINLF))
SETERR_RETURN(context, AL_INVALID_VALUE,, "Band-pass gainlf out of range");
filter->GainLF = val;
break;
default:
alSetError(context, AL_INVALID_ENUM, "Invalid band-pass float property 0x%04x", param);
}
}
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 param, ALint *UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid band-pass integer property 0x%04x", param); }
static void ALbandpass_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid band-pass integer-vector property 0x%04x", param); }
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:
alSetError(context, AL_INVALID_ENUM, "Invalid band-pass float property 0x%04x", param);
}
}
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 param, ALint UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
static void ALnullfilter_setParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, const ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
static void ALnullfilter_setParamf(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALfloat UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
static void ALnullfilter_setParamfv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, const ALfloat *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
static void ALnullfilter_getParami(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint *UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
static void ALnullfilter_getParamiv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALint *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
static void ALnullfilter_getParamf(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALfloat *UNUSED(val))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
static void ALnullfilter_getParamfv(ALfilter *UNUSED(filter), ALCcontext *context, ALenum param, ALfloat *UNUSED(vals))
{ alSetError(context, AL_INVALID_ENUM, "Invalid null filter property 0x%04x", param); }
DEFINE_ALFILTER_VTABLE(ALnullfilter);
static ALfilter *AllocFilter(ALCcontext *context)
{
ALCdevice *device = context->Device;
FilterSubList *sublist, *subend;
ALfilter *filter = NULL;
ALsizei lidx = 0;
ALsizei slidx;
almtx_lock(&device->FilterLock);
sublist = VECTOR_BEGIN(device->FilterList);
subend = VECTOR_END(device->FilterList);
for(;sublist != subend;++sublist)
{
if(sublist->FreeMask)
{
slidx = CTZ64(sublist->FreeMask);
filter = sublist->Filters + slidx;
break;
}
++lidx;
}
if(UNLIKELY(!filter))
{
const FilterSubList empty_sublist = { 0, NULL };
/* Don't allocate so many list entries that the 32-bit ID could
* overflow...
*/
if(UNLIKELY(VECTOR_SIZE(device->FilterList) >= 1<<25))
{
almtx_unlock(&device->FilterLock);
alSetError(context, AL_OUT_OF_MEMORY, "Too many filters allocated");
return NULL;
}
lidx = (ALsizei)VECTOR_SIZE(device->FilterList);
VECTOR_PUSH_BACK(device->FilterList, empty_sublist);
sublist = &VECTOR_BACK(device->FilterList);
sublist->FreeMask = ~U64(0);
sublist->Filters = al_calloc(16, sizeof(ALfilter)*64);
if(UNLIKELY(!sublist->Filters))
{
VECTOR_POP_BACK(device->FilterList);
almtx_unlock(&device->FilterLock);
alSetError(context, AL_OUT_OF_MEMORY, "Failed to allocate filter batch");
return NULL;
}
slidx = 0;
filter = sublist->Filters + slidx;
}
memset(filter, 0, sizeof(*filter));
InitFilterParams(filter, AL_FILTER_NULL);
/* Add 1 to avoid filter ID 0. */
filter->id = ((lidx<<6) | slidx) + 1;
sublist->FreeMask &= ~(U64(1)<<slidx);
almtx_unlock(&device->FilterLock);
return filter;
}
static void FreeFilter(ALCdevice *device, ALfilter *filter)
{
ALuint id = filter->id - 1;
ALsizei lidx = id >> 6;
ALsizei slidx = id & 0x3f;
memset(filter, 0, sizeof(*filter));
VECTOR_ELEM(device->FilterList, lidx).FreeMask |= U64(1) << slidx;
}
void ReleaseALFilters(ALCdevice *device)
{
FilterSubList *sublist = VECTOR_BEGIN(device->FilterList);
FilterSubList *subend = VECTOR_END(device->FilterList);
size_t leftover = 0;
for(;sublist != subend;++sublist)
{
ALuint64 usemask = ~sublist->FreeMask;
while(usemask)
{
ALsizei idx = CTZ64(usemask);
ALfilter *filter = sublist->Filters + idx;
memset(filter, 0, sizeof(*filter));
++leftover;
usemask &= ~(U64(1) << idx);
}
sublist->FreeMask = ~usemask;
}
if(leftover > 0)
WARN("(%p) Deleted "SZFMT" Filter%s\n", device, leftover, (leftover==1)?"":"s");
}
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;
}
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