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https://github.com/love2d/megasource.git
synced 2026-08-20 04:30:45 +02:00
Added missing changes to the OpenAL-Soft update.
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@@ -16,31 +16,112 @@
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#include "hrtf.h"
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#include "align.h"
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#include "math_defs.h"
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#define F_PI (3.14159265358979323846f)
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#define F_PI_2 (1.57079632679489661923f)
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#define F_2PI (6.28318530717958647692f)
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#define MAX_PITCH (255)
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#ifndef FLT_EPSILON
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#define FLT_EPSILON (1.19209290e-07f)
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#endif
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/* Maximum number of buffer samples before the current pos needed for resampling. */
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#define MAX_PRE_SAMPLES 12
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#define DEG2RAD(x) ((ALfloat)(x) * (F_PI/180.0f))
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#define RAD2DEG(x) ((ALfloat)(x) * (180.0f/F_PI))
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#define SRC_HISTORY_BITS (6)
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#define SRC_HISTORY_LENGTH (1<<SRC_HISTORY_BITS)
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#define SRC_HISTORY_MASK (SRC_HISTORY_LENGTH-1)
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#define MAX_PITCH (10)
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/* Maximum number of buffer samples after the current pos needed for resampling. */
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#define MAX_POST_SAMPLES 12
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct ALsource;
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struct ALvoice;
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/* The number of distinct scale and phase intervals within the filter table. */
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#define BSINC_SCALE_BITS 4
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#define BSINC_SCALE_COUNT (1<<BSINC_SCALE_BITS)
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#define BSINC_PHASE_BITS 4
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#define BSINC_PHASE_COUNT (1<<BSINC_PHASE_BITS)
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/* Interpolator state. Kind of a misnomer since the interpolator itself is
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* stateless. This just keeps it from having to recompute scale-related
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* mappings for every sample.
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*/
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typedef struct BsincState {
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ALfloat sf; /* Scale interpolation factor. */
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ALuint m; /* Coefficient count. */
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ALint l; /* Left coefficient offset. */
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struct {
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const ALfloat *filter; /* Filter coefficients. */
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const ALfloat *scDelta; /* Scale deltas. */
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const ALfloat *phDelta; /* Phase deltas. */
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const ALfloat *spDelta; /* Scale-phase deltas. */
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} coeffs[BSINC_PHASE_COUNT];
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} BsincState;
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typedef union aluVector {
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alignas(16) ALfloat v[4];
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} aluVector;
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inline void aluVectorSet(aluVector *vector, ALfloat x, ALfloat y, ALfloat z, ALfloat w)
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{
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vector->v[0] = x;
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vector->v[1] = y;
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vector->v[2] = z;
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vector->v[3] = w;
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}
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typedef union aluMatrixf {
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alignas(16) ALfloat m[4][4];
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} aluMatrixf;
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inline void aluMatrixfSetRow(aluMatrixf *matrix, ALuint row,
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ALfloat m0, ALfloat m1, ALfloat m2, ALfloat m3)
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{
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matrix->m[row][0] = m0;
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matrix->m[row][1] = m1;
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matrix->m[row][2] = m2;
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matrix->m[row][3] = m3;
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}
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inline void aluMatrixfSet(aluMatrixf *matrix, ALfloat m00, ALfloat m01, ALfloat m02, ALfloat m03,
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ALfloat m10, ALfloat m11, ALfloat m12, ALfloat m13,
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ALfloat m20, ALfloat m21, ALfloat m22, ALfloat m23,
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ALfloat m30, ALfloat m31, ALfloat m32, ALfloat m33)
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{
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aluMatrixfSetRow(matrix, 0, m00, m01, m02, m03);
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aluMatrixfSetRow(matrix, 1, m10, m11, m12, m13);
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aluMatrixfSetRow(matrix, 2, m20, m21, m22, m23);
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aluMatrixfSetRow(matrix, 3, m30, m31, m32, m33);
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}
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typedef union aluMatrixd {
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alignas(16) ALdouble m[4][4];
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} aluMatrixd;
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inline void aluMatrixdSetRow(aluMatrixd *matrix, ALuint row,
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ALdouble m0, ALdouble m1, ALdouble m2, ALdouble m3)
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{
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matrix->m[row][0] = m0;
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matrix->m[row][1] = m1;
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matrix->m[row][2] = m2;
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matrix->m[row][3] = m3;
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}
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inline void aluMatrixdSet(aluMatrixd *matrix, ALdouble m00, ALdouble m01, ALdouble m02, ALdouble m03,
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ALdouble m10, ALdouble m11, ALdouble m12, ALdouble m13,
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ALdouble m20, ALdouble m21, ALdouble m22, ALdouble m23,
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ALdouble m30, ALdouble m31, ALdouble m32, ALdouble m33)
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{
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aluMatrixdSetRow(matrix, 0, m00, m01, m02, m03);
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aluMatrixdSetRow(matrix, 1, m10, m11, m12, m13);
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aluMatrixdSetRow(matrix, 2, m20, m21, m22, m23);
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aluMatrixdSetRow(matrix, 3, m30, m31, m32, m33);
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}
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enum ActiveFilters {
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AF_None = 0,
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AF_LowPass = 1,
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@@ -49,19 +130,6 @@ enum ActiveFilters {
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};
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typedef struct HrtfState {
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alignas(16) ALfloat History[SRC_HISTORY_LENGTH];
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alignas(16) ALfloat Values[HRIR_LENGTH][2];
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} HrtfState;
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typedef struct HrtfParams {
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alignas(16) ALfloat Coeffs[HRIR_LENGTH][2];
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alignas(16) ALfloat CoeffStep[HRIR_LENGTH][2];
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ALuint Delay[2];
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ALint DelayStep[2];
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} HrtfParams;
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typedef struct MixGains {
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ALfloat Current;
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ALfloat Step;
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@@ -71,11 +139,15 @@ typedef struct MixGains {
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typedef struct DirectParams {
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ALfloat (*OutBuffer)[BUFFERSIZE];
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ALuint OutChannels;
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/* If not 'moving', gain/coefficients are set directly without fading. */
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ALboolean Moving;
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/* Stepping counter for gain/coefficient fading. */
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ALuint Counter;
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/* Last direction (relative to listener) and gain of a moving source. */
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aluVector LastDir;
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ALfloat LastGain;
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struct {
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enum ActiveFilters ActiveType;
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@@ -83,17 +155,11 @@ typedef struct DirectParams {
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ALfilterState HighPass;
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} Filters[MAX_INPUT_CHANNELS];
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union {
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struct {
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HrtfParams Params[MAX_INPUT_CHANNELS];
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HrtfState State[MAX_INPUT_CHANNELS];
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ALuint IrSize;
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ALfloat Gain;
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ALfloat Dir[3];
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} Hrtf;
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MixGains Gains[MAX_INPUT_CHANNELS][MaxChannels];
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} Mix;
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struct {
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HrtfParams Params;
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HrtfState State;
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} Hrtf[MAX_INPUT_CHANNELS];
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MixGains Gains[MAX_INPUT_CHANNELS][MAX_OUTPUT_CHANNELS];
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} DirectParams;
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typedef struct SendParams {
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@@ -108,14 +174,15 @@ typedef struct SendParams {
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ALfilterState HighPass;
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} Filters[MAX_INPUT_CHANNELS];
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/* Gain control, which applies to all input channels to a single (mono)
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/* Gain control, which applies to each input channel to a single (mono)
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* output buffer. */
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MixGains Gain;
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MixGains Gains[MAX_INPUT_CHANNELS];
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} SendParams;
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typedef const ALfloat* (*ResamplerFunc)(const ALfloat *src, ALuint frac, ALuint increment,
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ALfloat *restrict dst, ALuint dstlen);
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typedef const ALfloat* (*ResamplerFunc)(const BsincState *state,
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const ALfloat *src, ALuint frac, ALuint increment, ALfloat *restrict dst, ALuint dstlen
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);
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typedef void (*MixerFunc)(const ALfloat *data, ALuint OutChans,
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ALfloat (*restrict OutBuffer)[BUFFERSIZE], struct MixGains *Gains,
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@@ -131,7 +198,7 @@ typedef void (*HrtfMixerFunc)(ALfloat (*restrict OutBuffer)[BUFFERSIZE], const A
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#define SPEEDOFSOUNDMETRESPERSEC (343.3f)
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#define AIRABSORBGAINHF (0.99426f) /* -0.05dB */
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#define FRACTIONBITS (14)
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#define FRACTIONBITS (12)
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#define FRACTIONONE (1<<FRACTIONBITS)
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#define FRACTIONMASK (FRACTIONONE-1)
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@@ -179,47 +246,75 @@ inline ALuint64 clampu64(ALuint64 val, ALuint64 min, ALuint64 max)
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{ return minu64(max, maxu64(min, val)); }
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union ResamplerCoeffs {
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ALfloat FIR4[FRACTIONONE][4];
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ALfloat FIR8[FRACTIONONE][8];
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};
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extern alignas(16) union ResamplerCoeffs ResampleCoeffs;
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extern alignas(16) const ALfloat bsincTab[18840];
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inline ALfloat lerp(ALfloat val1, ALfloat val2, ALfloat mu)
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{
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return val1 + (val2-val1)*mu;
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}
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inline ALfloat cubic(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALfloat mu)
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inline ALfloat resample_fir4(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALuint frac)
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{
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ALfloat mu2 = mu*mu;
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ALfloat a0 = -0.5f*val0 + 1.5f*val1 + -1.5f*val2 + 0.5f*val3;
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ALfloat a1 = val0 + -2.5f*val1 + 2.0f*val2 + -0.5f*val3;
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ALfloat a2 = -0.5f*val0 + 0.5f*val2;
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ALfloat a3 = val1;
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return a0*mu*mu2 + a1*mu2 + a2*mu + a3;
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const ALfloat *k = ResampleCoeffs.FIR4[frac];
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return k[0]*val0 + k[1]*val1 + k[2]*val2 + k[3]*val3;
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}
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inline ALfloat resample_fir8(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALfloat val4, ALfloat val5, ALfloat val6, ALfloat val7, ALuint frac)
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{
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const ALfloat *k = ResampleCoeffs.FIR8[frac];
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return k[0]*val0 + k[1]*val1 + k[2]*val2 + k[3]*val3 +
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k[4]*val4 + k[5]*val5 + k[6]*val6 + k[7]*val7;
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}
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void aluInitMixer(void);
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ALvoid aluInitPanning(ALCdevice *Device);
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/**
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* ComputeAngleGains
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* ComputeDirectionalGains
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*
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* Sets channel gains based on a given source's angle and its half-width. The
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* angle and hwidth parameters are in radians.
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* Sets channel gains based on a direction. The direction must be a 3-component
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* vector no longer than 1 unit.
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*/
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void ComputeAngleGains(const ALCdevice *device, ALfloat angle, ALfloat hwidth, ALfloat ingain, ALfloat gains[MaxChannels]);
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void ComputeDirectionalGains(const ALCdevice *device, const ALfloat dir[3], ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]);
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/**
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* SetGains
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* ComputeAngleGains
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*
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* Helper to set the appropriate channels to the specified gain.
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* Sets channel gains based on angle and elevation. The angle and elevation
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* parameters are in radians, going right and up respectively.
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*/
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inline void SetGains(const ALCdevice *device, ALfloat ingain, ALfloat gains[MaxChannels])
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{
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ComputeAngleGains(device, 0.0f, F_PI, ingain, gains);
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}
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void ComputeAngleGains(const ALCdevice *device, ALfloat angle, ALfloat elevation, ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]);
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/**
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* ComputeAmbientGains
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*
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* Sets channel gains for ambient, omni-directional sounds.
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*/
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void ComputeAmbientGains(const ALCdevice *device, ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]);
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/**
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* ComputeBFormatGains
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*
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* Sets channel gains for a given (first-order) B-Format channel. The matrix is
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* a 1x4 'slice' of the rotation matrix for a given channel used to orient the
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* coefficients.
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*/
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void ComputeBFormatGains(const ALCdevice *device, const ALfloat mtx[4], ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]);
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ALvoid CalcSourceParams(struct ALactivesource *src, const ALCcontext *ALContext);
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ALvoid CalcNonAttnSourceParams(struct ALactivesource *src, const ALCcontext *ALContext);
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ALvoid UpdateContextSources(ALCcontext *context);
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ALvoid MixSource(struct ALactivesource *src, ALCdevice *Device, ALuint SamplesToDo);
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ALvoid CalcSourceParams(struct ALvoice *voice, const struct ALsource *source, const ALCcontext *ALContext);
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ALvoid CalcNonAttnSourceParams(struct ALvoice *voice, const struct ALsource *source, const ALCcontext *ALContext);
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ALvoid MixSource(struct ALvoice *voice, struct ALsource *source, ALCdevice *Device, ALuint SamplesToDo);
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ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size);
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/* Caller must lock the device. */
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@@ -233,4 +328,3 @@ extern ALfloat ZScale;
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#endif
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#endif
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