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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
#ifndef _ALU_H_
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#define _ALU_H_
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#include "config.h"
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#include "AL/al.h"
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#include "AL/alc.h"
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#include "AL/alext.h"
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#include <limits.h>
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#include <math.h>
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#ifdef HAVE_FLOAT_H
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#include <float.h>
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#endif
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#ifndef M_PI
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#define M_PI 3.14159265358979323846 /* pi */
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#define M_PI_2 1.57079632679489661923 /* pi/2 */
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#endif
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#ifdef HAVE_POWF
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#define aluPow(x,y) (float2ALfp(powf(ALfp2float(x), ALfp2float(y))))
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#else
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#define aluPow(x,y) (float2ALfp((float)pow((double)ALfp2float(x), (double)ALfp2float(y))))
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#endif
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#ifdef HAVE_SQRTF
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#define aluSqrt(x) (float2ALfp(sqrtf(ALfp2float(x))))
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#else
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#define aluSqrt(x) (float2ALfp((float)sqrt((double)ALfp2float(x))))
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#endif
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#ifdef HAVE_ACOSF
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#define aluAcos(x) (float2ALfp(acosf(ALfp2float(x))))
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#else
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#define aluAcos(x) (float2ALfp((float)acos((double)ALfp2float(x))))
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#endif
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#ifdef HAVE_ATANF
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#define aluAtan(x) (float2ALfp(atanf(ALfp2float(x))))
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#else
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#define aluAtan(x) (float2ALfp((float)atan((double)ALfp2float(x))))
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#endif
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#ifdef HAVE_FABSF
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#define aluFabs(x) (float2ALfp(fabsf(ALfp2float(x))))
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#else
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#define aluFabs(x) (float2ALfp((float)fabs((double)ALfp2float(x))))
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#endif
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// FIXME make this better
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#if defined(max) && !defined(__max)
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#define __max(x,y) float2ALfp(max(ALfp2float(x),ALfp2float(y)))
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#endif
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#if defined(min) && !defined(__min)
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#define __min(x,y) float2ALfp(min(ALfp2float(x),ALfp2float(y)))
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#endif
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#define QUADRANT_NUM 128
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#define LUT_NUM (4 * QUADRANT_NUM)
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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FRONT_LEFT = 0,
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FRONT_RIGHT,
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FRONT_CENTER,
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LFE,
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BACK_LEFT,
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BACK_RIGHT,
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BACK_CENTER,
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SIDE_LEFT,
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SIDE_RIGHT,
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} Channel;
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#ifndef MAXCHANNELS
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#define MAXCHANNELS (SIDE_RIGHT+1)
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#error MAXCHANNELS
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#endif
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#define BUFFERSIZE 4096
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#define FRACTIONBITS (14)
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#define FRACTIONONE (1<<FRACTIONBITS)
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#define FRACTIONMASK (FRACTIONONE-1)
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/* Size for temporary stack storage of buffer data. Larger values need more
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* stack, while smaller values may need more iterations. The value needs to be
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* a sensible size, however, as it constrains the max stepping value used for
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* mixing.
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* The mixer requires being able to do two samplings per mixing loop. A 16KB
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* buffer can hold 512 sample frames for a 7.1 float buffer. With the cubic
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* resampler (which requires 3 padding sample frames), this limits the maximum
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* step to about 508. This means that buffer_freq*source_pitch cannot exceed
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* device_freq*508 for an 8-channel 32-bit buffer. */
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#ifndef STACK_DATA_SIZE
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#define STACK_DATA_SIZE 16384
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#endif
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//FIXME this code assumes ALfp==ALdfp
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static __inline ALdfp lerp(ALdfp val1, ALdfp val2, ALdfp mu)
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{
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ALdfp retval;
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retval = val1 + ALfpMult((val2-val1),mu);
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return retval;
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}
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static __inline ALdfp cubic(ALdfp val0, ALdfp val1, ALdfp val2, ALdfp val3, ALdfp mu)
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{
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ALdfp retval;
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ALdfp mu2;mu2 = ALfpMult(mu,mu);
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ALdfp a0;a0 = ALfpMult(float2ALfp(-0.5f),val0) + ALfpMult(float2ALfp( 1.5f),val1) + ALfpMult(float2ALfp(-1.5f),val2) + ALfpMult(float2ALfp( 0.5), val3);
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ALdfp a1;a1 = val0 + ALfpMult(float2ALfp(-2.5f),val1) + ALfpMult(float2ALfp( 2.0), val2) + ALfpMult(float2ALfp(-0.5f),val3);
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ALdfp a2;a2 = ALfpMult(float2ALfp(-0.5f),val0) + ALfpMult(float2ALfp( 0.5), val2);
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ALdfp a3;a3 = val1;
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retval = ALfpMult(ALfpMult(a0,mu),mu2) + ALfpMult(a1,mu2) + ALfpMult(a2,mu) + a3;
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return retval;
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}
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struct ALsource;
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ALvoid aluInitPanning(ALCdevice *Device);
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ALint aluCart2LUTpos(ALfp re, ALfp im);
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ALvoid CalcSourceParams(struct ALsource *ALSource, const ALCcontext *ALContext);
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ALvoid CalcNonAttnSourceParams(struct ALsource *ALSource, const ALCcontext *ALContext);
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ALvoid MixSource(struct ALsource *Source, ALCdevice *Device, ALuint SamplesToDo);
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ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size);
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ALvoid aluHandleDisconnect(ALCdevice *device);
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#ifdef __cplusplus
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}
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#endif
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#endif
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