diff options
| -rw-r--r-- | Alc/ALc.c | 4 | ||||
| -rw-r--r-- | Alc/hrtf.c | 527 | ||||
| -rw-r--r-- | Alc/hrtf_tables.inc | 1685 | ||||
| -rw-r--r-- | Alc/mixer_c.c | 6 | ||||
| -rw-r--r-- | Alc/mixer_inc.c | 17 | ||||
| -rw-r--r-- | Alc/mixer_neon.c | 6 | ||||
| -rw-r--r-- | Alc/mixer_sse.c | 109 | ||||
| -rw-r--r-- | OpenAL32/Include/alMain.h | 6 | ||||
| -rw-r--r-- | hrtf.txt | 76 | ||||
| -rw-r--r-- | utils/makehrtf.c | 2705 |
10 files changed, 3492 insertions, 1649 deletions
@@ -836,8 +836,6 @@ static void alc_initconfig(void) } FillCPUCaps(capfilter); - InitHrtf(); - #ifdef _WIN32 RTPrioLevel = 1; #else @@ -1034,7 +1032,7 @@ static void alc_deinit_safe(void) { alc_cleanup(); - FreeHrtf(); + FreeHrtfs(); FreeALConfig(); ThunkExit(); @@ -27,56 +27,75 @@ #include "AL/alc.h" #include "alMain.h" #include "alSource.h" +#include "alu.h" +/* Current data set limits defined by the makehrtf utility. */ +#define MIN_IR_SIZE (8) +#define MAX_IR_SIZE (128) +#define MOD_IR_SIZE (8) -static const ALchar magicMarker[8] = "MinPHR00"; +#define MIN_EV_COUNT (5) +#define MAX_EV_COUNT (128) -#define HRIR_COUNT 828 -#define ELEV_COUNT 19 +#define MIN_AZ_COUNT (1) +#define MAX_AZ_COUNT (128) -static const ALushort evOffset[ELEV_COUNT] = { 0, 1, 13, 37, 73, 118, 174, 234, 306, 378, 450, 522, 594, 654, 710, 755, 791, 815, 827 }; -static const ALubyte azCount[ELEV_COUNT] = { 1, 12, 24, 36, 45, 56, 60, 72, 72, 72, 72, 72, 60, 56, 45, 36, 24, 12, 1 }; +struct Hrtf { + ALuint sampleRate; + ALuint irSize; + ALubyte evCount; + const ALubyte *azCount; + const ALushort *evOffset; + const ALshort *coeffs; + const ALubyte *delays; -static const struct Hrtf { - ALuint sampleRate; - ALshort coeffs[HRIR_COUNT][HRIR_LENGTH]; - ALubyte delays[HRIR_COUNT]; -} DefaultHrtf = { - 44100, -#include "hrtf_tables.inc" + struct Hrtf *next; }; -static struct Hrtf *LoadedHrtfs = NULL; -static ALuint NumLoadedHrtfs = 0; +static const ALchar magicMarker[8] = "MinPHR01"; + +/* Define the default HRTF: + * ALubyte defaultAzCount [DefaultHrtf.evCount] + * ALushort defaultEvOffset [DefaultHrtf.evCount] + * ALshort defaultCoeffs [DefaultHrtf.irCount * defaultHrtf.irSize] + * ALubyte defaultDelays [DefaultHrtf.irCount] + * + * struct Hrtf DefaultHrtf + */ +#include "hrtf_tables.inc" +static struct Hrtf *LoadedHrtfs = NULL; -// Calculate the elevation indices given the polar elevation in radians. -// This will return two indices between 0 and (ELEV_COUNT-1) and an -// interpolation factor between 0.0 and 1.0. -static void CalcEvIndices(ALfloat ev, ALuint *evidx, ALfloat *evmu) +/* Calculate the elevation indices given the polar elevation in radians. + * This will return two indices between 0 and (Hrtf->evCount - 1) and an + * interpolation factor between 0.0 and 1.0. + */ +static void CalcEvIndices(const struct Hrtf *Hrtf, ALfloat ev, ALuint *evidx, ALfloat *evmu) { - ev = (F_PI_2 + ev) * (ELEV_COUNT-1) / F_PI; + ev = (F_PI_2 + ev) * (Hrtf->evCount-1) / F_PI; evidx[0] = fastf2u(ev); - evidx[1] = minu(evidx[0] + 1, ELEV_COUNT-1); + evidx[1] = minu(evidx[0] + 1, Hrtf->evCount-1); *evmu = ev - evidx[0]; } -// Calculate the azimuth indices given the polar azimuth in radians. This -// will return two indices between 0 and (azCount [ei] - 1) and an -// interpolation factor between 0.0 and 1.0. -static void CalcAzIndices(ALuint evidx, ALfloat az, ALuint *azidx, ALfloat *azmu) +/* Calculate the azimuth indices given the polar azimuth in radians. This + * will return two indices between 0 and (Hrtf->azCount[ei] - 1) and an + * interpolation factor between 0.0 and 1.0. + */ +static void CalcAzIndices(const struct Hrtf *Hrtf, ALuint evidx, ALfloat az, ALuint *azidx, ALfloat *azmu) { - az = (F_PI*2.0f + az) * azCount[evidx] / (F_PI*2.0f); - azidx[0] = fastf2u(az) % azCount[evidx]; - azidx[1] = (azidx[0] + 1) % azCount[evidx]; + az = (F_PI*2.0f + az) * Hrtf->azCount[evidx] / (F_PI*2.0f); + azidx[0] = fastf2u(az) % Hrtf->azCount[evidx]; + azidx[1] = (azidx[0] + 1) % Hrtf->azCount[evidx]; *azmu = az - floorf(az); } -// Calculates the normalized HRTF transition factor (delta) from the changes -// in gain and listener to source angle between updates. The result is a -// normalized delta factor than can be used to calculate moving HRIR stepping -// values. +/* Calculates the normalized HRTF transition factor (delta) from the changes + * in gain and listener to source angle between updates. The result is a + * normalized delta factor that can be used to calculate moving HRIR stepping + * values. + */ ALfloat CalcHrtfDelta(ALfloat oldGain, ALfloat newGain, const ALfloat olddir[3], const ALfloat newdir[3]) { ALfloat gainChange, angleChange, change; @@ -106,10 +125,11 @@ ALfloat CalcHrtfDelta(ALfloat oldGain, ALfloat newGain, const ALfloat olddir[3], return minf(change, 1.0f); } -// Calculates static HRIR coefficients and delays for the given polar -// elevation and azimuth in radians. Linear interpolation is used to -// increase the apparent resolution of the HRIR dataset. The coefficients -// are also normalized and attenuated by the specified gain. +/* Calculates static HRIR coefficients and delays for the given polar + * elevation and azimuth in radians. Linear interpolation is used to + * increase the apparent resolution of the HRIR data set. The coefficients + * are also normalized and attenuated by the specified gain. + */ void GetLerpedHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat (*coeffs)[2], ALuint *delays) { ALuint evidx[2], azidx[2]; @@ -118,78 +138,90 @@ void GetLerpedHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azi ALuint i; // Claculate elevation indices and interpolation factor. - CalcEvIndices(elevation, evidx, &mu[2]); + CalcEvIndices(Hrtf, elevation, evidx, &mu[2]); // Calculate azimuth indices and interpolation factor for the first // elevation. - CalcAzIndices(evidx[0], azimuth, azidx, &mu[0]); + CalcAzIndices(Hrtf, evidx[0], azimuth, azidx, &mu[0]); // Calculate the first set of linear HRIR indices for left and right // channels. - lidx[0] = evOffset[evidx[0]] + azidx[0]; - lidx[1] = evOffset[evidx[0]] + azidx[1]; - ridx[0] = evOffset[evidx[0]] + ((azCount[evidx[0]]-azidx[0]) % azCount[evidx[0]]); - ridx[1] = evOffset[evidx[0]] + ((azCount[evidx[0]]-azidx[1]) % azCount[evidx[0]]); + lidx[0] = Hrtf->evOffset[evidx[0]] + azidx[0]; + lidx[1] = Hrtf->evOffset[evidx[0]] + azidx[1]; + ridx[0] = Hrtf->evOffset[evidx[0]] + ((Hrtf->azCount[evidx[0]]-azidx[0]) % Hrtf->azCount[evidx[0]]); + ridx[1] = Hrtf->evOffset[evidx[0]] + ((Hrtf->azCount[evidx[0]]-azidx[1]) % Hrtf->azCount[evidx[0]]); // Calculate azimuth indices and interpolation factor for the second // elevation. - CalcAzIndices(evidx[1], azimuth, azidx, &mu[1]); + CalcAzIndices(Hrtf, evidx[1], azimuth, azidx, &mu[1]); // Calculate the second set of linear HRIR indices for left and right // channels. - lidx[2] = evOffset[evidx[1]] + azidx[0]; - lidx[3] = evOffset[evidx[1]] + azidx[1]; - ridx[2] = evOffset[evidx[1]] + ((azCount[evidx[1]]-azidx[0]) % azCount[evidx[1]]); - ridx[3] = evOffset[evidx[1]] + ((azCount[evidx[1]]-azidx[1]) % azCount[evidx[1]]); + lidx[2] = Hrtf->evOffset[evidx[1]] + azidx[0]; + lidx[3] = Hrtf->evOffset[evidx[1]] + azidx[1]; + ridx[2] = Hrtf->evOffset[evidx[1]] + ((Hrtf->azCount[evidx[1]]-azidx[0]) % Hrtf->azCount[evidx[1]]); + ridx[3] = Hrtf->evOffset[evidx[1]] + ((Hrtf->azCount[evidx[1]]-azidx[1]) % Hrtf->azCount[evidx[1]]); - /* Calculate 4 blending weights for 2D bilinear interpolation */ + /* Calculate 4 blending weights for 2D bilinear interpolation. */ blend[0] = (1.0f-mu[0]) * (1.0f-mu[2]); blend[1] = ( mu[0]) * (1.0f-mu[2]); blend[2] = (1.0f-mu[1]) * ( mu[2]); blend[3] = ( mu[1]) * ( mu[2]); - // Calculate the normalized and attenuated HRIR coefficients using linear - // interpolation when there is enough gain to warrant it. Zero the - // coefficients if gain is too low. + /* Calculate the HRIR delays using linear interpolation. */ + delays[0] = fastf2u(Hrtf->delays[lidx[0]]*blend[0] + Hrtf->delays[lidx[1]]*blend[1] + + Hrtf->delays[lidx[2]]*blend[2] + Hrtf->delays[lidx[3]]*blend[3] + + 0.5f) << HRTFDELAY_BITS; + delays[1] = fastf2u(Hrtf->delays[ridx[0]]*blend[0] + Hrtf->delays[ridx[1]]*blend[1] + + Hrtf->delays[ridx[2]]*blend[2] + Hrtf->delays[ridx[3]]*blend[3] + + 0.5f) << HRTFDELAY_BITS; + + /* Calculate the sample offsets for the HRIR indices. */ + lidx[0] *= Hrtf->irSize; + lidx[1] *= Hrtf->irSize; + lidx[2] *= Hrtf->irSize; + lidx[3] *= Hrtf->irSize; + ridx[0] *= Hrtf->irSize; + ridx[1] *= Hrtf->irSize; + ridx[2] *= Hrtf->irSize; + ridx[3] *= Hrtf->irSize; + + /* Calculate the normalized and attenuated HRIR coefficients using linear + * interpolation when there is enough gain to warrant it. Zero the + * coefficients if gain is too low. + */ if(gain > 0.0001f) { gain *= 1.0f/32767.0f; - for(i = 0;i < HRIR_LENGTH;i++) + for(i = 0;i < Hrtf->irSize;i++) { - coeffs[i][0] = (Hrtf->coeffs[lidx[0]][i]*blend[0] + - Hrtf->coeffs[lidx[1]][i]*blend[1] + - Hrtf->coeffs[lidx[2]][i]*blend[2] + - Hrtf->coeffs[lidx[3]][i]*blend[3]) * gain; - coeffs[i][1] = (Hrtf->coeffs[ridx[0]][i]*blend[0] + - Hrtf->coeffs[ridx[1]][i]*blend[1] + - Hrtf->coeffs[ridx[2]][i]*blend[2] + - Hrtf->coeffs[ridx[3]][i]*blend[3]) * gain; + coeffs[i][0] = (Hrtf->coeffs[lidx[0]+i]*blend[0] + + Hrtf->coeffs[lidx[1]+i]*blend[1] + + Hrtf->coeffs[lidx[2]+i]*blend[2] + + Hrtf->coeffs[lidx[3]+i]*blend[3]) * gain; + coeffs[i][1] = (Hrtf->coeffs[ridx[0]+i]*blend[0] + + Hrtf->coeffs[ridx[1]+i]*blend[1] + + Hrtf->coeffs[ridx[2]+i]*blend[2] + + Hrtf->coeffs[ridx[3]+i]*blend[3]) * gain; } } else { - for(i = 0;i < HRIR_LENGTH;i++) + for(i = 0;i < Hrtf->irSize;i++) { coeffs[i][0] = 0.0f; coeffs[i][1] = 0.0f; } } - - // Calculate the HRIR delays using linear interpolation. - delays[0] = fastf2u(Hrtf->delays[lidx[0]]*blend[0] + Hrtf->delays[lidx[1]]*blend[1] + - Hrtf->delays[lidx[2]]*blend[2] + Hrtf->delays[lidx[3]]*blend[3] + - 0.5f) << HRTFDELAY_BITS; - delays[1] = fastf2u(Hrtf->delays[ridx[0]]*blend[0] + Hrtf->delays[ridx[1]]*blend[1] + - Hrtf->delays[ridx[2]]*blend[2] + Hrtf->delays[ridx[3]]*blend[3] + - 0.5f) << HRTFDELAY_BITS; } -// Calculates the moving HRIR target coefficients, target delays, and -// stepping values for the given polar elevation and azimuth in radians. -// Linear interpolation is used to increase the apparent resolution of the -// HRIR dataset. The coefficients are also normalized and attenuated by the -// specified gain. Stepping resolution and count is determined using the -// given delta factor between 0.0 and 1.0. +/* Calculates the moving HRIR target coefficients, target delays, and + * stepping values for the given polar elevation and azimuth in radians. + * Linear interpolation is used to increase the apparent resolution of the + * HRIR data set. The coefficients are also normalized and attenuated by the + * specified gain. Stepping resolution and count is determined using the + * given delta factor between 0.0 and 1.0. + */ ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat delta, ALint counter, ALfloat (*coeffs)[2], ALuint *delays, ALfloat (*coeffStep)[2], ALint *delayStep) { ALuint evidx[2], azidx[2]; @@ -200,45 +232,73 @@ ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat a ALuint i; // Claculate elevation indices and interpolation factor. - CalcEvIndices(elevation, evidx, &mu[2]); + CalcEvIndices(Hrtf, elevation, evidx, &mu[2]); // Calculate azimuth indices and interpolation factor for the first // elevation. - CalcAzIndices(evidx[0], azimuth, azidx, &mu[0]); + CalcAzIndices(Hrtf, evidx[0], azimuth, azidx, &mu[0]); // Calculate the first set of linear HRIR indices for left and right // channels. - lidx[0] = evOffset[evidx[0]] + azidx[0]; - lidx[1] = evOffset[evidx[0]] + azidx[1]; - ridx[0] = evOffset[evidx[0]] + ((azCount[evidx[0]]-azidx[0]) % azCount[evidx[0]]); - ridx[1] = evOffset[evidx[0]] + ((azCount[evidx[0]]-azidx[1]) % azCount[evidx[0]]); + lidx[0] = Hrtf->evOffset[evidx[0]] + azidx[0]; + lidx[1] = Hrtf->evOffset[evidx[0]] + azidx[1]; + ridx[0] = Hrtf->evOffset[evidx[0]] + ((Hrtf->azCount[evidx[0]]-azidx[0]) % Hrtf->azCount[evidx[0]]); + ridx[1] = Hrtf->evOffset[evidx[0]] + ((Hrtf->azCount[evidx[0]]-azidx[1]) % Hrtf->azCount[evidx[0]]); // Calculate azimuth indices and interpolation factor for the second // elevation. - CalcAzIndices(evidx[1], azimuth, azidx, &mu[1]); + CalcAzIndices(Hrtf, evidx[1], azimuth, azidx, &mu[1]); // Calculate the second set of linear HRIR indices for left and right // channels. - lidx[2] = evOffset[evidx[1]] + azidx[0]; - lidx[3] = evOffset[evidx[1]] + azidx[1]; - ridx[2] = evOffset[evidx[1]] + ((azCount[evidx[1]]-azidx[0]) % azCount[evidx[1]]); - ridx[3] = evOffset[evidx[1]] + ((azCount[evidx[1]]-azidx[1]) % azCount[evidx[1]]); + lidx[2] = Hrtf->evOffset[evidx[1]] + azidx[0]; + lidx[3] = Hrtf->evOffset[evidx[1]] + azidx[1]; + ridx[2] = Hrtf->evOffset[evidx[1]] + ((Hrtf->azCount[evidx[1]]-azidx[0]) % Hrtf->azCount[evidx[1]]); + ridx[3] = Hrtf->evOffset[evidx[1]] + ((Hrtf->azCount[evidx[1]]-azidx[1]) % Hrtf->azCount[evidx[1]]); // Calculate the stepping parameters. delta = maxf(floorf(delta*(Hrtf->sampleRate*0.015f) + 0.5f), 1.0f); step = 1.0f / delta; - /* Calculate 4 blending weights for 2D bilinear interpolation */ + /* Calculate 4 blending weights for 2D bilinear interpolation. */ blend[0] = (1.0f-mu[0]) * (1.0f-mu[2]); blend[1] = ( mu[0]) * (1.0f-mu[2]); blend[2] = (1.0f-mu[1]) * ( mu[2]); blend[3] = ( mu[1]) * ( mu[2]); - // Calculate the normalized and attenuated target HRIR coefficients using - // linear interpolation when there is enough gain to warrant it. Zero - // the target coefficients if gain is too low. Then calculate the - // coefficient stepping values using the target and previous running - // coefficients. + /* Calculate the HRIR delays using linear interpolation. Then calculate + * the delay stepping values using the target and previous running + * delays. + */ + left = (ALfloat)(delays[0] - (delayStep[0] * counter)); + right = (ALfloat)(delays[1] - (delayStep[1] * counter)); + + delays[0] = fastf2u(Hrtf->delays[lidx[0]]*blend[0] + Hrtf->delays[lidx[1]]*blend[1] + + Hrtf->delays[lidx[2]]*blend[2] + Hrtf->delays[lidx[3]]*blend[3] + + 0.5f) << HRTFDELAY_BITS; + delays[1] = fastf2u(Hrtf->delays[ridx[0]]*blend[0] + Hrtf->delays[ridx[1]]*blend[1] + + Hrtf->delays[ridx[2]]*blend[2] + Hrtf->delays[ridx[3]]*blend[3] + + 0.5f) << HRTFDELAY_BITS; + + delayStep[0] = fastf2i(step * (delays[0] - left)); + delayStep[1] = fastf2i(step * (delays[1] - right)); + + /* Calculate the sample offsets for the HRIR indices. */ + lidx[0] *= Hrtf->irSize; + lidx[1] *= Hrtf->irSize; + lidx[2] *= Hrtf->irSize; + lidx[3] *= Hrtf->irSize; + ridx[0] *= Hrtf->irSize; + ridx[1] *= Hrtf->irSize; + ridx[2] *= Hrtf->irSize; + ridx[3] *= Hrtf->irSize; + + /* Calculate the normalized and attenuated target HRIR coefficients using + * linear interpolation when there is enough gain to warrant it. Zero + * the target coefficients if gain is too low. Then calculate the + * coefficient stepping values using the target and previous running + * coefficients. + */ if(gain > 0.0001f) { gain *= 1.0f/32767.0f; @@ -247,14 +307,14 @@ ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat a left = coeffs[i][0] - (coeffStep[i][0] * counter); right = coeffs[i][1] - (coeffStep[i][1] * counter); - coeffs[i][0] = (Hrtf->coeffs[lidx[0]][i]*blend[0] + - Hrtf->coeffs[lidx[1]][i]*blend[1] + - Hrtf->coeffs[lidx[2]][i]*blend[2] + - Hrtf->coeffs[lidx[3]][i]*blend[3]) * gain; - coeffs[i][1] = (Hrtf->coeffs[ridx[0]][i]*blend[0] + - Hrtf->coeffs[ridx[1]][i]*blend[1] + - Hrtf->coeffs[ridx[2]][i]*blend[2] + - Hrtf->coeffs[ridx[3]][i]*blend[3]) * gain; + coeffs[i][0] = (Hrtf->coeffs[lidx[0]+i]*blend[0] + + Hrtf->coeffs[lidx[1]+i]*blend[1] + + Hrtf->coeffs[lidx[2]+i]*blend[2] + + Hrtf->coeffs[lidx[3]+i]*blend[3]) * gain; + coeffs[i][1] = (Hrtf->coeffs[ridx[0]+i]*blend[0] + + Hrtf->coeffs[ridx[1]+i]*blend[1] + + Hrtf->coeffs[ridx[2]+i]*blend[2] + + Hrtf->coeffs[ridx[3]+i]*blend[3]) * gain; coeffStep[i][0] = step * (coeffs[i][0] - left); coeffStep[i][1] = step * (coeffs[i][1] - right); @@ -275,82 +335,63 @@ ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat a } } - // Calculate the HRIR delays using linear interpolation. Then calculate - // the delay stepping values using the target and previous running - // delays. - left = (ALfloat)(delays[0] - (delayStep[0] * counter)); - right = (ALfloat)(delays[1] - (delayStep[1] * counter)); - - delays[0] = fastf2u(Hrtf->delays[lidx[0]]*blend[0] + Hrtf->delays[lidx[1]]*blend[1] + - Hrtf->delays[lidx[2]]*blend[2] + Hrtf->delays[lidx[3]]*blend[3] + - 0.5f) << HRTFDELAY_BITS; - delays[1] = fastf2u(Hrtf->delays[ridx[0]]*blend[0] + Hrtf->delays[ridx[1]]*blend[1] + - Hrtf->delays[ridx[2]]*blend[2] + Hrtf->delays[ridx[3]]*blend[3] + - 0.5f) << HRTFDELAY_BITS; - - delayStep[0] = fastf2i(step * (delays[0] - left)); - delayStep[1] = fastf2i(step * (delays[1] - right)); - - // The stepping count is the number of samples necessary for the HRIR to - // complete its transition. The mixer will only apply stepping for this - // many samples. + /* The stepping count is the number of samples necessary for the HRIR to + * complete its transition. The mixer will only apply stepping for this + * many samples. + */ return fastf2u(delta); } -const struct Hrtf *GetHrtf(ALCdevice *device) -{ - if(device->FmtChans == DevFmtStereo) - { - ALuint i; - for(i = 0;i < NumLoadedHrtfs;i++) - { - if(device->Frequency == LoadedHrtfs[i].sampleRate) - return &LoadedHrtfs[i]; - } - if(device->Frequency == DefaultHrtf.sampleRate) - return &DefaultHrtf; - } - ERR("Incompatible format: %s %uhz\n", - DevFmtChannelsString(device->FmtChans), device->Frequency); - return NULL; -} - -void InitHrtf(void) +static struct Hrtf *LoadHrtf(ALuint deviceRate) { - char *fnamelist=NULL, *next=NULL; - const char *val; + const char *fnamelist = NULL; + char rateStr[16 + 1]; + ALsizei rateLen; - if(ConfigValueStr(NULL, "hrtf_tables", &val)) - next = fnamelist = strdup(val); - while(next && *next) + rateLen = minu(snprintf(rateStr, 16, "%u", deviceRate), 16); + ConfigValueStr(NULL, "hrtf_tables", &fnamelist); + while(*fnamelist != '\0') { const ALubyte maxDelay = SRC_HISTORY_LENGTH-1; - struct Hrtf newdata; + struct Hrtf *Hrtf = NULL; ALboolean failed; ALchar magic[9]; ALsizei i, j; - char *fname; + ALuint rate = 0, irCount; + ALubyte irSize = 0, evCount = 0, *azCount, *delays; + ALushort *evOffset; + ALshort *coeffs; + char fname[256 + 1]; FILE *f; - fname = next; - next = strchr(fname, ','); - if(next) + while(isspace(*fnamelist) || *fnamelist == ',') + fnamelist++; + i = 0; + while(*fnamelist != '\0' && *fnamelist != ',') { - while(next != fname) + if(i < 256) { - next--; - if(!isspace(*next)) + if(*fnamelist == '%' && *(fnamelist+1) == 'r') + { + strncpy(&fname[i], rateStr, minu(rateLen, 256-i)); + i += minu(rateLen, 256-i); + fnamelist++; + } + else { - *(next++) = '\0'; - break; + fname[i] = *fnamelist; + i++; } } - while(isspace(*next) || *next == ',') - next++; + fnamelist++; } + while(isspace(fname[i-1])) + i--; + fname[i] = '\0'; - if(!fname[0]) + if(fname[0] == '\0') continue; + TRACE("Loading %s\n", fname); f = fopen(fname, "rb"); if(f == NULL) @@ -360,6 +401,10 @@ void InitHrtf(void) } failed = AL_FALSE; + azCount = NULL; + evOffset = NULL; + coeffs = NULL; + delays = NULL; if(fread(magic, 1, sizeof(magicMarker), f) != sizeof(magicMarker)) { ERR("Failed to read magic marker\n"); @@ -374,40 +419,55 @@ void InitHrtf(void) if(!failed) { - ALushort hrirCount, hrirSize; - ALubyte evCount; - - newdata.sampleRate = fgetc(f); - newdata.sampleRate |= fgetc(f)<<8; - newdata.sampleRate |= fgetc(f)<<16; - newdata.sampleRate |= fgetc(f)<<24; + rate = fgetc(f); + rate |= fgetc(f)<<8; + rate |= fgetc(f)<<16; + rate |= fgetc(f)<<24; - hrirCount = fgetc(f); - hrirCount |= fgetc(f)<<8; - - hrirSize = fgetc(f); - hrirSize |= fgetc(f)<<8; + irSize = fgetc(f); evCount = fgetc(f); - if(hrirCount != HRIR_COUNT || hrirSize != HRIR_LENGTH || evCount != ELEV_COUNT) + if(rate != deviceRate) + { + ERR("HRIR rate does not match device rate: rate=%d (%d)\n", + rate, deviceRate); + failed = AL_TRUE; + } + if(irSize < MIN_IR_SIZE || irSize > MAX_IR_SIZE || (irSize%MOD_IR_SIZE)) + { + ERR("Unsupported HRIR size: irSize=%d (%d to %d by %d)\n", + irSize, MIN_IR_SIZE, MAX_IR_SIZE, MOD_IR_SIZE); + failed = AL_TRUE; + } + if(evCount < MIN_EV_COUNT || evCount > MAX_EV_COUNT) + { + ERR("Unsupported elevation count: evCount=%d (%d to %d)\n", + evCount, MIN_EV_COUNT, MAX_EV_COUNT); + failed = AL_TRUE; + } + } + + if(!failed) + { + azCount = malloc(sizeof(azCount[0])*evCount); + evOffset = malloc(sizeof(evOffset[0])*evCount); + if(azCount == NULL || evOffset == NULL) { - ERR("Unsupported value: hrirCount=%d (%d), hrirSize=%d (%d), evCount=%d (%d)\n", - hrirCount, HRIR_COUNT, hrirSize, HRIR_LENGTH, evCount, ELEV_COUNT); + ERR("Out of memory.\n"); failed = AL_TRUE; } } if(!failed) { - for(i = 0;i < ELEV_COUNT;i++) + for(i = 0;i < evCount;i++) { - ALushort offset; - offset = fgetc(f); - offset |= fgetc(f)<<8; - if(offset != evOffset[i]) + azCount[i] = fgetc(f); + if(azCount[i] < MIN_AZ_COUNT || azCount[i] > MAX_AZ_COUNT) { - ERR("Unsupported evOffset[%d] value: %d (%d)\n", i, offset, evOffset[i]); + ERR("Unsupported azimuth count: azCount[%d]=%d (%d to %d)\n", + i, azCount[i], MIN_AZ_COUNT, MAX_AZ_COUNT); failed = AL_TRUE; } } @@ -415,24 +475,41 @@ void InitHrtf(void) if(!failed) { - for(i = 0;i < HRIR_COUNT;i++) + evOffset[0] = 0; + irCount = azCount[0]; + for(i = 1;i < evCount;i++) + { + evOffset[i] = evOffset[i-1] + azCount[i-1]; + irCount += azCount[i]; + } + + coeffs = malloc(sizeof(coeffs[0])*irSize*irCount); + delays = malloc(sizeof(delays[0])*irCount); + if(coeffs == NULL || delays == NULL) + { + ERR("Out of memory.\n"); + failed = AL_TRUE; + } + } + + if(!failed) + { + for(i = 0;i < (ALsizei)(irCount*irSize);i+=irSize) { - for(j = 0;j < HRIR_LENGTH;j++) + for(j = 0;j < (ALsizei)irSize;j++) { ALshort coeff; coeff = fgetc(f); coeff |= fgetc(f)<<8; - newdata.coeffs[i][j] = coeff; + coeffs[i+j] = coeff; } } - for(i = 0;i < HRIR_COUNT;i++) + for(i = 0;i < (ALsizei)irCount;i++) { - ALubyte delay; - delay = fgetc(f); - newdata.delays[i] = delay; - if(delay > maxDelay) + delays[i] = fgetc(f); + if(delays[i] > maxDelay) { - ERR("Invalid delay[%d]: %d (%d)\n", i, delay, maxDelay); + ERR("Invalid delays[%d]: %d (%d)\n", i, delays[i], maxDelay); failed = AL_TRUE; } } @@ -449,25 +526,81 @@ void InitHrtf(void) if(!failed) { - void *temp = realloc(LoadedHrtfs, (NumLoadedHrtfs+1)*sizeof(LoadedHrtfs[0])); - if(temp != NULL) + Hrtf = malloc(sizeof(struct Hrtf)); + if(Hrtf == NULL) { - LoadedHrtfs = temp; - TRACE("Loaded HRTF support for format: %s %uhz\n", - DevFmtChannelsString(DevFmtStereo), newdata.sampleRate); - LoadedHrtfs[NumLoadedHrtfs++] = newdata; + ERR("Out of memory.\n"); + failed = AL_TRUE; } } + + if(!failed) + { + Hrtf->sampleRate = rate; + Hrtf->irSize = irSize; + Hrtf->evCount = evCount; + Hrtf->azCount = azCount; + Hrtf->evOffset = evOffset; + Hrtf->coeffs = coeffs; + Hrtf->delays = delays; + Hrtf->next = LoadedHrtfs; + LoadedHrtfs = Hrtf; + TRACE("Loaded HRTF support for format: %s %uhz\n", + DevFmtChannelsString(DevFmtStereo), Hrtf->sampleRate); + return Hrtf; + } else + { + free(azCount); + free(evOffset); + free(coeffs); + free(delays); ERR("Failed to load %s\n", fname); + } + } + return NULL; +} + +const struct Hrtf *GetHrtf(ALCdevice *device) +{ + if(device->FmtChans == DevFmtStereo) + { + struct Hrtf *Hrtf = LoadedHrtfs; + while(Hrtf != NULL) + { + if(device->Frequency == Hrtf->sampleRate) + return Hrtf; + Hrtf = Hrtf->next; + } + + Hrtf = LoadHrtf(device->Frequency); + if(Hrtf != NULL) + return Hrtf; + + if(device->Frequency == DefaultHrtf.sampleRate) + return &DefaultHrtf; + } + ERR("Incompatible format: %s %uhz\n", + DevFmtChannelsString(device->FmtChans), device->Frequency); + return NULL; +} + +void FreeHrtfs(void) +{ + struct Hrtf *Hrtf = NULL; + + while((Hrtf=LoadedHrtfs) != NULL) + { + LoadedHrtfs = Hrtf->next; + free((void*)Hrtf->azCount); + free((void*)Hrtf->evOffset); + free((void*)Hrtf->coeffs); + free((void*)Hrtf->delays); + free(Hrtf); } - free(fnamelist); - fnamelist = NULL; } -void FreeHrtf(void) +ALuint GetHrtfIrSize (const struct Hrtf *Hrtf) { - NumLoadedHrtfs = 0; - free(LoadedHrtfs); - LoadedHrtfs = NULL; + return Hrtf->irSize; } diff --git a/Alc/hrtf_tables.inc b/Alc/hrtf_tables.inc index 4ba1416e..19e4c458 100644 --- a/Alc/hrtf_tables.inc +++ b/Alc/hrtf_tables.inc @@ -1,839 +1,850 @@ -/* This data is Copyright 1994 by the MIT Media Laboratory. It is provided free - * with no restrictions on use, provided the authors are cited when the data is - * used in any research or commercial application. */ -/* Bill Gardner <[email protected]> and Keith Martin <[email protected]> */ +/* Elevation metrics */ +static const ALubyte defaultAzCount[19] = { 1, 12, 24, 36, 45, 56, 60, 72, 72, 72, 72, 72, 60, 56, 45, 36, 24, 12, 1, }; +static const ALushort defaultEvOffset[19] = { 0, 1, 13, 37, 73, 118, 174, 234, 306, 378, 450, 522, 594, 654, 710, 755, 791, 815, 827, }; - /* HRIR Coefficients */ - { - { +5817, +7833, +3253, +2795, +1080, +403, +948, -690, -2207, -1110, +658, -33, -481, -949, -839, -287, -146, -103, +7, -47, -269, -105, -316, -221, -304, -497, -373, -231, -114, -14, +66, -62, }, - { +6586, +8107, +2781, +3167, +1095, +99, +922, -641, -2255, -1457, +602, +170, -469, -781, -818, -773, -258, +8, -111, -125, -368, -216, -345, -265, -298, -447, -408, -158, -22, +0, +63, -96, }, - { +5986, +7570, +2713, +2756, +1080, +403, +921, -758, -2112, -1067, +565, -93, -431, -738, -604, -361, -238, +10, +63, -88, -302, -101, -306, -243, -358, -488, -341, -224, -98, -1, +79, -55, }, - { +5571, +7005, +2499, +2549, +974, +438, +959, -688, -1966, -793, +755, -35, -305, -631, -545, -165, -118, -72, +26, -36, -228, -36, -253, -158, -261, -436, -311, -197, -85, +11, +82, -47, }, - { +5472, +6865, +2460, +2524, +978, +492, +1057, -561, -1857, -706, +813, -3, -353, -739, -587, -120, -98, -94, +21, -32, -228, -31, -232, -119, -204, -399, -293, -197, -124, -45, +34, -81, }, - { +5627, +7081, +2487, +2449, +858, +396, +981, -676, -2051, -899, +820, +82, -332, -774, -643, -127, -26, -14, +72, +27, -183, -16, -234, -142, -240, -422, -289, -151, -36, +63, +108, -65, }, - { +6172, +7677, +2541, +2564, +874, +397, +966, -927, -2421, -1117, +905, +38, -545, -990, -785, -200, -66, -60, +50, +17, -244, -35, -244, -146, -246, -433, -290, -139, -42, +40, +108, -37, }, - { +6521, +8320, +2827, +2690, +909, +230, +917, -1084, -2525, -1115, +652, -122, -480, -974, -823, -289, -150, +21, +73, -58, -296, -90, -299, -198, -317, -480, -327, -206, -64, +25, +103, -47, }, - { +6956, +8505, +2738, +3040, +1131, +209, +719, -1389, -2419, -516, +530, -857, -697, -801, -443, -77, -328, -117, +128, -70, -281, -49, -356, -233, -419, -579, -344, -271, -169, -16, +76, -98, }, - { +7928, +9215, +2040, +2470, +595, +264, +1348, -1308, -2698, -258, +1302, -836, -1179, -1210, -483, +125, -403, -370, +81, -61, -416, -45, -378, -208, -426, -708, -383, -223, -150, -20, +82, -119, }, - { +8205, +9593, +2241, +2306, +197, +241, +1480, -1080, -3081, -704, +1757, -153, -1144, -1906, -912, +311, -4, -441, -129, -99, -476, -104, -467, -207, -379, -660, -412, -194, -106, -31, +48, -172, }, - { +7822, +9388, +3008, +2690, +349, +155, +1066, -976, -3351, -1396, +1366, +202, -165, -1794, -1686, +63, +209, -110, -81, -164, -375, -114, -487, -174, -394, -771, -456, -312, -109, +27, +100, -71, }, - { +7342, +9001, +2833, +2968, +859, +118, +830, -1009, -2609, -1583, +1030, +177, -566, -888, -1564, -882, +55, +78, +62, +48, -275, -224, -531, -354, -242, -534, -487, -241, -107, +31, +92, -76, }, - { +7420, +8277, +2251, +3723, +1049, -308, +945, -518, -2311, -1945, +592, +496, -502, -565, -848, -1420, -265, +189, -293, -192, -468, -339, -342, -319, -275, -379, -474, -58, +77, -10, +55, -134, }, - { +6584, +7746, +2495, +3374, +1000, -52, +897, -756, -2030, -1406, +280, +34, -398, -477, -456, -856, -571, +107, +104, -158, -435, -199, -286, -253, -345, -425, -316, -178, -107, -66, +74, -62, }, - { +6049, +7215, +2251, +2809, +1129, +395, +858, -790, -1953, -1091, +399, -101, -343, -474, -371, -537, -334, +183, +103, -155, -328, -94, -287, -281, -418, -457, -307, -226, -82, +10, +91, -45, }, - { +5611, +6654, +2026, +2614, +1122, +421, +846, -730, -1795, -787, +486, -181, -199, -331, -331, -290, -184, +57, +64, -94, -264, -59, -241, -160, -276, -381, -321, -242, -63, +33, +98, -44, }, - { +5099, +6036, +1921, +2401, +945, +508, +937, -640, -1638, -506, +755, -23, -74, -266, -268, -108, -114, -39, +41, -26, -172, +33, -185, -102, -220, -366, -254, -174, -58, +33, +94, -28, }, - { +4863, +5622, +1644, +2154, +818, +547, +1098, -307, -1280, -210, +982, +96, -111, -376, -319, -58, -43, -22, +51, -10, -188, -3, -174, -47, -165, -316, -201, -114, -14, +20, +16, -134, }, - { +4874, +5742, +1871, +2357, +961, +630, +1147, -376, -1424, -337, +863, +34, -193, -499, -332, +8, -81, -97, +36, -13, -175, +46, -137, -17, -102, -297, -226, -178, -147, -83, +1, -91, }, - { +4960, +5827, +1797, +2194, +842, +622, +1162, -376, -1492, -421, +910, +56, -246, -568, -430, +32, +120, +83, +106, +18, -182, -19, -208, -85, -152, -240, -94, -64, -84, -82, -30, -123, }, - { +5228, +6194, +1872, +2175, +707, +445, +1001, -617, -1837, -723, +933, +227, -167, -586, -451, +10, +86, +68, +127, +106, -88, +66, -146, -70, -175, -339, -208, -74, +41, +139, +139, -76, }, - { +5697, +6722, +1953, +2283, +727, +469, +969, -882, -2258, -1037, +972, +175, -413, -806, -593, -28, +130, +87, +177, +163, -115, +43, -180, -84, -142, -297, -156, -24, +4, +49, +85, -29, }, - { +6473, +7408, +1826, +2417, +711, +442, +966, -1188, -2613, -1118, +1193, +107, -644, -1020, -716, -117, +16, -26, +92, +89, -223, +39, -164, -76, -190, -362, -208, -46, +24, +86, +145, -12, }, - { +7101, +8208, +1841, +2445, +711, +357, +985, -1505, -2879, -1121, +1181, +70, -658, -1173, -814, -168, -29, +29, +47, +36, -265, -40, -293, -166, -283, -429, -229, -63, +43, +81, +160, -20, }, - { +7271, +8783, +2298, +2617, +755, +48, +900, -1532, -2806, -1083, +615, -189, -449, -1001, -807, -311, -150, +184, +122, -88, -322, -71, -273, -179, -335, -451, -278, -188, -9, +60, +138, -32, }, - { +7519, +8972, +2519, +3099, +1077, -70, +527, -1818, -2665, -568, +208, -889, -424, -657, -398, -291, -483, +67, +222, -56, -219, -19, -307, -204, -436, -529, -306, -304, -126, +27, +128, -48, }, - { +8267, +9086, +2039, +3441, +1167, -66, +449, -2175, -2478, +261, +170, -1844, -741, -537, +19, +68, -620, -86, +289, -131, -285, +19, -414, -244, -560, -647, -289, -330, -230, -5, +89, -141, }, - { +9334, +10020, +1039, +2681, +800, -36, +1253, -2153, -2906, +675, +921, -2082, -1336, -748, +118, +362, -708, -352, +305, -89, -430, +16, -461, -267, -609, -817, -292, -288, -287, -70, +134, -107, }, - { +10490, +10443, +234, +2319, +106, +215, +1880, -2162, -3146, +928, +1870, -2011, -1861, -1339, +44, +548, -846, -647, +252, -93, -597, +65, -464, -180, -581, -943, -344, -209, -200, -20, +104, -191, }, - { +11090, +10859, +176, +1929, -492, +415, +2257, -1899, -3660, +617, +2693, -1436, -2083, -2245, -339, +944, -576, -854, +49, -173, -603, +64, -607, -194, -525, -910, -310, -113, -162, +10, +55, -268, }, - { +11123, +11231, +589, +1885, -762, +272, +2193, -1677, -4087, +10, +3036, -569, -1972, -2950, -747, +1099, +20, -922, -216, -122, -721, -53, -651, -153, -474, -845, -423, -135, -107, -57, +30, -304, }, - { +10803, +11222, +1474, +2265, -883, +91, +1845, -1667, -4470, -728, +2793, +190, -972, -3366, -1480, +1091, +471, -617, -486, -175, -639, -113, -591, -51, -507, -934, -502, -309, -106, -118, +53, -177, }, - { +10246, +10868, +2402, +2554, -531, +31, +1268, -1323, -4728, -1500, +2335, +359, +174, -2966, -2559, +743, +585, -219, -198, -287, -474, -103, -696, -72, -517, -1094, -493, -391, -81, +78, +133, -87, }, - { +9638, +10459, +2554, +3136, -109, -170, +1213, -1306, -4339, -2094, +2099, +264, +202, -1798, -3312, -170, +781, +126, +63, -260, -424, +20, -759, -504, -338, -983, -510, -236, -85, +153, +125, -96, }, - { +9150, +10114, +2114, +3243, +563, -199, +731, -1335, -3018, -2131, +1610, +397, -733, -785, -2524, -1463, +491, +266, +80, +156, -304, -383, -768, -471, -118, -592, -631, -225, -95, +87, +113, -96, }, - { +8454, +9243, +2047, +3497, +881, -249, +701, -1042, -2617, -2062, +1294, +712, -942, -676, -1397, -1797, -57, +250, -231, -14, -250, -237, -521, -454, -179, -387, -649, -192, -30, +13, +161, -121, }, - { +8323, +8323, +1685, +4494, 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}, - { +18333, +10203, -6584, +85, -1382, +1684, -563, -2346, -2049, +928, +1357, -671, +1226, -1413, +733, -229, -1009, -521, -666, +153, -618, -188, -102, +925, -315, +267, -79, -795, -334, -687, -385, +130, }, - { +16441, +9946, -5138, -473, -1669, +2005, -91, -2252, -1996, +837, +1093, -412, +1392, -1542, +535, -11, -1080, -203, -475, +134, -478, -260, -105, +753, -285, +165, +32, -670, -301, -515, -295, +22, }, - { +13089, +9529, -4017, -237, +483, +1183, -334, -1490, -1552, +647, +1264, -471, +629, -605, +562, -36, -643, -387, -501, +84, -371, -60, -86, +640, -100, +137, -1, -574, -350, -440, -324, -139, }, - { +11898, +9621, -3405, -1165, +243, +1679, +179, -1312, -1709, +64, +1140, -239, +692, -458, +479, +250, -561, -188, -174, +41, -320, -165, -304, +589, -101, -43, +124, -435, -309, -354, -282, -103, }, - { +10997, +9658, -2780, -1802, -26, +1783, +569, -947, -1662, -248, +967, -127, +729, -294, +466, +390, -354, -145, +46, +95, -329, -112, -479, +387, +17, -149, +90, -226, -277, -280, -149, -147, }, - { +10403, +9825, -2433, -2099, -53, +1814, +738, -808, -1574, -372, +873, -167, +701, -213, +490, +502, -294, -53, +103, +45, -399, -57, -537, +124, +113, -120, +21, -185, -188, -248, -114, -74, }, - { +10392, +9882, -2497, -2112, +324, +1944, +702, -937, -1618, -322, +898, -262, +449, -113, +460, +482, -188, -10, +186, -20, -556, -166, -451, +104, +9, -20, +13, -185, -148, -338, -76, +107, }, - { +10862, +9834, -2867, -1780, +884, +2063, +422, -1170, -1644, -165, +979, -389, +198, -268, +566, +314, -335, +218, +172, -127, -560, -306, -505, +230, +61, -85, -17, -114, -234, -393, -69, +141, }, - { +11578, +9958, -3241, -1267, +1305, +1835, +61, -1353, -1523, +172, +1158, -610, -59, -256, +501, +100, -434, +87, +156, -173, -554, -216, -452, +238, -8, +72, -57, -233, -279, -439, -54, +128, }, - { +12590, +10282, -3669, -831, +1213, +1299, -204, -1324, -1305, +642, +1310, -929, -150, -265, +378, -166, -511, -226, -25, -77, -591, -30, -316, +195, -77, +192, -79, -444, -281, -501, -173, +158, }, - { +13820, +10820, -4370, -641, +688, +719, -208, -1170, -1120, +1054, +1422, -1268, +60, -395, +126, -158, -785, -547, -55, -15, -622, +139, -270, +187, +11, +211, -203, -518, -250, -711, -272, +251, }, - { +14973, +10840, -5035, -319, +215, +327, -180, -1056, -1001, +1357, +1436, -1376, +373, -623, +75, -133, -1012, -696, -148, +89, -603, +166, -149, +257, +111, +201, -249, -478, -375, -806, -271, +241, }, - { +15155, +10582, -5238, +16, +115, +211, -361, -1141, -1066, +1374, +1522, -1325, +512, -561, +33, -137, -860, -968, -261, +174, -757, +281, -16, +297, +93, +272, -236, -631, -384, -770, -341, +145, }, - { +14475, +9926, -4814, +144, +323, +523, -528, -1336, -1319, +1198, +1433, -1025, +675, -646, +308, -70, -834, -739, -508, +86, -551, +161, +29, +400, +61, +248, -225, -631, -389, -587, -390, -22, }, - { +11096, +9607, -2841, -481, +1236, +612, -162, -1033, -885, +1058, +1197, -645, +47, -150, +202, +5, -433, -652, -254, -16, -605, +40, +33, +357, +315, +288, -273, -769, -633, -453, +2, +259, }, - }, +/* HRIR Coefficients */ +static const ALshort defaultCoeffs[848700] = +{ + +6245, +8418, +3440, +2877, +1077, +321, +880, -856, -2486, -1290, +621, -142, -628, -1106, -998, -404, -239, -201, -81, -135, -380, -198, -420, -329, -410, -617, -487, -329, -204, -95, -4, -149, + +7068, +8719, +2927, +3268, +1110, +3, +858, -795, -2531, -1655, +570, +83, -609, -924, -969, -915, -357, -74, -200, -216, -480, -309, -445, -371, -399, -558, -515, -245, -99, -75, -3, -178, + +6451, +8122, +2856, +2844, +1080, +328, +858, -917, -2379, -1238, +535, -199, -565, -867, -743, -480, -324, -73, -16, -174, -409, -186, -405, -349, -462, -601, -447, -313, -181, -75, +14, -136, + +6005, +7530, +2626, +2615, +965, +360, +889, -851, -2222, -945, +726, -137, -431, -766, -696, -280, -210, -171, -61, -128, -339, -128, -358, -270, -370, -557, -425, -296, -176, -72, +6, -139, + +5901, +7415, +2589, +2576, +975, +440, +1005, -724, -2103, -837, +800, -110, 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+197, -107, +203, +14, +189, -355, -777, -516, -924, -458, +58, + +15468, +10670, -5248, +0, +348, +441, -693, -1492, -1502, +1200, +1468, -1209, +625, -746, +219, -158, -964, -894, -624, +11, -688, +93, -44, +335, -3, +183, -326, -757, -508, -710, -494, -108, + +11864, +10339, -3078, -621, +1333, +598, -269, -1143, -1003, +1077, +1244, -765, -16, -194, +146, -60, -510, -758, -332, -71, -718, -16, -15, +315, +287, +251, -356, -886, -747, -549, -54, +217, +}; - /* HRIR Delays */ - { 12, 12, 13, 14, 14, 14, 13, 12, 11, 10, 10, 10, 11, 12, 13, 14, 15, 15, 16, 16, 16, 15, 15, 14, 13, 12, 11, 10, 9, 8, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16, 17, 18, 18, 18, 18, 18, 17, 16, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6, 6, 6, 6, 7, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 18, 19, 20, 20, 20, 20, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 8, 7, 6, 5, 5, 5, 4, 4, 4, 5, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 21, 22, 22, 22, 22, 22, 21, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 4, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 22, 23, 24, 24, 24, 24, 24, 23, 22, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 23, 24, 24, 25, 26, 26, 26, 26, 26, 25, 24, 24, 23, 22, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 26, 27, 28, 28, 28, 27, 26, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 26, 27, 28, 28, 28, 27, 26, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 23, 24, 24, 25, 26, 26, 26, 26, 26, 25, 24, 24, 23, 22, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 22, 23, 24, 24, 24, 24, 24, 23, 22, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 21, 22, 22, 22, 22, 22, 21, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 4, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 18, 19, 20, 20, 20, 20, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 8, 7, 6, 5, 5, 5, 4, 4, 4, 5, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16, 17, 18, 18, 18, 18, 18, 17, 16, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6, 6, 6, 6, 7, 7, 8, 9, 10, 11, 12, 13, 14, 15, 15, 16, 16, 16, 15, 15, 14, 13, 12, 11, 10, 9, 8, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 14, 14, 13, 12, 11, 10, 10, 10, 11, 12, } +/* HRIR Delays */ +static const ALubyte defaultDelays[828] = +{ + 12, 12, 13, 14, 14, 14, 13, 12, 11, 10, 10, 10, 11, 12, 13, 14, 15, 15, 16, 16, 16, 15, 15, 14, 13, 12, 11, 10, 9, 8, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16, 17, 18, 18, 18, 18, 18, 17, 16, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6, 6, 6, 6, 7, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 18, 19, 20, 20, 20, 20, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 8, 7, 6, 5, 5, 5, 4, 4, 4, 5, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 21, 22, 22, 22, 22, 22, 21, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 4, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 22, 23, 24, 24, 24, 24, 24, 23, 22, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 23, 24, 24, 25, 26, 26, 26, 26, 26, 25, 24, 24, 23, 22, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 6, + 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 26, 27, 28, 28, 28, 27, 26, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 26, 27, 28, 28, 28, 27, 26, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 23, 24, 24, 25, 26, 26, 26, 26, 26, 25, 24, 24, 23, 22, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6 +, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 22, 23, 24, 24, 24, 24, 24, 23, 22, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 21, 22, 22, 22, 22, 22, 21, 21, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 4, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 18, 19, 20, 20, 20, 20, 20, 19, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 8, 7, 6, 5, 5, 5, 4, 4, 4, 5, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16, 17, 18, 18, 18, 18, 18, 17, 16, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6, 6, 6, 6, 7, 7, 8, 9, 10, 11, 12, 13, 14, 15, 15, 16, 16, 16, 15, 15, 14, 13, 12, 11, 10, 9, 8, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 14, 14, 13, 12, 11, 10, 10, 10, 11, 12, +}; + +/* Default HRTF Definition */ +static const struct Hrtf DefaultHrtf = { + 44100, 32, 19, defaultAzCount, defaultEvOffset, + defaultCoeffs, defaultDelays, NULL +}; diff --git a/Alc/mixer_c.c b/Alc/mixer_c.c index aecf03a5..fab13c0f 100644 --- a/Alc/mixer_c.c +++ b/Alc/mixer_c.c @@ -7,12 +7,13 @@ static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint IrSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat (*RESTRICT CoeffStep)[2], ALfloat left, ALfloat right) { ALuint c; - for(c = 0;c < HRIR_LENGTH;c++) + for(c = 0;c < IrSize;c++) { const ALuint off = (Offset+c)&HRIR_MASK; Values[off][0] += Coeffs[c][0] * left; @@ -23,11 +24,12 @@ static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2 } static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint IrSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat left, ALfloat right) { ALuint c; - for(c = 0;c < HRIR_LENGTH;c++) + for(c = 0;c < IrSize;c++) { const ALuint off = (Offset+c)&HRIR_MASK; Values[off][0] += Coeffs[c][0] * left; diff --git a/Alc/mixer_inc.c b/Alc/mixer_inc.c index 359662cc..c3df342e 100644 --- a/Alc/mixer_inc.c +++ b/Alc/mixer_inc.c @@ -24,10 +24,12 @@ static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint irSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat (*RESTRICT CoeffStep)[2], ALfloat left, ALfloat right); static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint irSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat left, ALfloat right); @@ -38,6 +40,7 @@ void MixDirect_Hrtf(ALsource *Source, ALCdevice *Device, DirectParams *params, ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize) { const ALint *RESTRICT DelayStep = params->Hrtf.DelayStep; + const ALuint IrSize = GetHrtfIrSize(Device->Hrtf); ALfloat (*RESTRICT DryBuffer)[MaxChannels]; ALfloat *RESTRICT ClickRemoval, *RESTRICT PendingClicks; ALfloat (*RESTRICT CoeffStep)[2] = params->Hrtf.CoeffStep; @@ -61,7 +64,7 @@ void MixDirect_Hrtf(ALsource *Source, ALCdevice *Device, DirectParams *params, DryFilter = ¶ms->iirFilter; pos = 0; - for(c = 0;c < HRIR_LENGTH;c++) + for(c = 0;c < IrSize;c++) { Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter); Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter); @@ -102,11 +105,11 @@ void MixDirect_Hrtf(ALsource *Source, ALCdevice *Device, DirectParams *params, Delay[0] += DelayStep[0]; Delay[1] += DelayStep[1]; - Values[Offset&HRIR_MASK][0] = 0.0f; - Values[Offset&HRIR_MASK][1] = 0.0f; + Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f; + Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f; Offset++; - ApplyCoeffsStep(Offset, Values, Coeffs, CoeffStep, left, right); + ApplyCoeffsStep(Offset, Values, IrSize, Coeffs, CoeffStep, left, right); DryBuffer[OutPos][FrontLeft] += Values[Offset&HRIR_MASK][0]; DryBuffer[OutPos][FrontRight] += Values[Offset&HRIR_MASK][1]; @@ -124,11 +127,11 @@ void MixDirect_Hrtf(ALsource *Source, ALCdevice *Device, DirectParams *params, left = History[(Offset-Delay[0])&SRC_HISTORY_MASK]; right = History[(Offset-Delay[1])&SRC_HISTORY_MASK]; - Values[Offset&HRIR_MASK][0] = 0.0f; - Values[Offset&HRIR_MASK][1] = 0.0f; + Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f; + Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f; Offset++; - ApplyCoeffs(Offset, Values, Coeffs, left, right); + ApplyCoeffs(Offset, Values, IrSize, Coeffs, left, right); DryBuffer[OutPos][FrontLeft] += Values[Offset&HRIR_MASK][0]; DryBuffer[OutPos][FrontRight] += Values[Offset&HRIR_MASK][1]; diff --git a/Alc/mixer_neon.c b/Alc/mixer_neon.c index f7a9fed5..0dedb885 100644 --- a/Alc/mixer_neon.c +++ b/Alc/mixer_neon.c @@ -11,12 +11,13 @@ static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint IrSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat (*RESTRICT CoeffStep)[2], ALfloat left, ALfloat right) { ALuint c; - for(c = 0;c < HRIR_LENGTH;c++) + for(c = 0;c < IrSize;c++) { const ALuint off = (Offset+c)&HRIR_MASK; Values[off][0] += Coeffs[c][0] * left; @@ -27,6 +28,7 @@ static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2 } static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint IrSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat left, ALfloat right) { @@ -38,7 +40,7 @@ static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2], leftright2 = vset_lane_f32(right, leftright2, 1); leftright4 = vcombine_f32(leftright2, leftright2); } - for(c = 0;c < HRIR_LENGTH;c += 2) + for(c = 0;c < IrSize;c += 2) { const ALuint o0 = (Offset+c)&HRIR_MASK; const ALuint o1 = (o0+1)&HRIR_MASK; diff --git a/Alc/mixer_sse.c b/Alc/mixer_sse.c index 443209bc..27b550e0 100644 --- a/Alc/mixer_sse.c +++ b/Alc/mixer_sse.c @@ -14,53 +14,116 @@ static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint IrSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat (*RESTRICT CoeffStep)[2], ALfloat left, ALfloat right) { const __m128 lrlr = { left, right, left, right }; + __m128 coeffs, deltas, imp0, imp1; __m128 vals = _mm_setzero_ps(); - __m128 coeffs, coeffstep; - ALuint c; - for(c = 0;c < HRIR_LENGTH;c += 2) + ALuint i; + + if((Offset&1)) { - const ALuint o0 = (Offset++)&HRIR_MASK; - const ALuint o1 = (Offset++)&HRIR_MASK; + const ALuint o0 = Offset&HRIR_MASK; + const ALuint o1 = (Offset+IrSize-1)&HRIR_MASK; - coeffs = _mm_load_ps(&Coeffs[c][0]); + coeffs = _mm_load_ps(&Coeffs[0][0]); + deltas = _mm_load_ps(&CoeffStep[0][0]); vals = _mm_loadl_pi(vals, (__m64*)&Values[o0][0]); - vals = _mm_loadh_pi(vals, (__m64*)&Values[o1][0]); - - vals = _mm_add_ps(vals, _mm_mul_ps(coeffs, lrlr)); + imp0 = _mm_mul_ps(lrlr, coeffs); + coeffs = _mm_add_ps(coeffs, deltas); + vals = _mm_add_ps(imp0, vals); + _mm_store_ps(&Coeffs[0][0], coeffs); _mm_storel_pi((__m64*)&Values[o0][0], vals); - _mm_storeh_pi((__m64*)&Values[o1][0], vals); - - coeffstep = _mm_load_ps(&CoeffStep[c][0]); - coeffs = _mm_add_ps(coeffs, coeffstep); - _mm_store_ps(&Coeffs[c][0], coeffs); + for(i = 1;i < IrSize-1;i += 2) + { + const ALuint o2 = (Offset+i)&HRIR_MASK; + + coeffs = _mm_load_ps(&Coeffs[i+1][0]); + deltas = _mm_load_ps(&CoeffStep[i+1][0]); + vals = _mm_load_ps(&Values[o2][0]); + imp1 = _mm_mul_ps(lrlr, coeffs); + coeffs = _mm_add_ps(coeffs, deltas); + imp0 = _mm_shuffle_ps(imp0, imp1, _MM_SHUFFLE(1, 0, 3, 2)); + vals = _mm_add_ps(imp0, vals); + _mm_store_ps(&Coeffs[i+1][0], coeffs); + _mm_store_ps(&Values[o2][0], vals); + imp0 = imp1; + } + vals = _mm_loadl_pi(vals, (__m64*)&Values[o1][0]); + imp0 = _mm_movehl_ps(imp0, imp0); + vals = _mm_add_ps(imp0, vals); + _mm_storel_pi((__m64*)&Values[o1][0], vals); + } + else + { + for(i = 0;i < IrSize;i += 2) + { + const ALuint o = (Offset + i)&HRIR_MASK; + + coeffs = _mm_load_ps(&Coeffs[i][0]); + deltas = _mm_load_ps(&CoeffStep[i][0]); + vals = _mm_load_ps(&Values[o][0]); + imp0 = _mm_mul_ps(lrlr, coeffs); + coeffs = _mm_add_ps(coeffs, deltas); + vals = _mm_add_ps(imp0, vals); + _mm_store_ps(&Coeffs[i][0], coeffs); + _mm_store_ps(&Values[o][0], vals); + } } } static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2], + const ALuint IrSize, ALfloat (*RESTRICT Coeffs)[2], ALfloat left, ALfloat right) { const __m128 lrlr = { left, right, left, right }; __m128 vals = _mm_setzero_ps(); __m128 coeffs; - ALuint c; - for(c = 0;c < HRIR_LENGTH;c += 2) + ALuint i; + + if((Offset&1)) { - const ALuint o0 = (Offset++)&HRIR_MASK; - const ALuint o1 = (Offset++)&HRIR_MASK; + const ALuint o0 = Offset&HRIR_MASK; + const ALuint o1 = (Offset+IrSize-1)&HRIR_MASK; + __m128 imp0, imp1; - coeffs = _mm_load_ps(&Coeffs[c][0]); + coeffs = _mm_load_ps(&Coeffs[0][0]); vals = _mm_loadl_pi(vals, (__m64*)&Values[o0][0]); - vals = _mm_loadh_pi(vals, (__m64*)&Values[o1][0]); - - vals = _mm_add_ps(vals, _mm_mul_ps(coeffs, lrlr)); + imp0 = _mm_mul_ps(lrlr, coeffs); + vals = _mm_add_ps(imp0, vals); _mm_storel_pi((__m64*)&Values[o0][0], vals); - _mm_storeh_pi((__m64*)&Values[o1][0], vals); + for(i = 1;i < IrSize-1;i += 2) + { + const ALuint o2 = (Offset+i)&HRIR_MASK; + + coeffs = _mm_load_ps(&Coeffs[i+1][0]); + vals = _mm_load_ps(&Values[o2][0]); + imp1 = _mm_mul_ps(lrlr, coeffs); + imp0 = _mm_shuffle_ps(imp0, imp1, _MM_SHUFFLE(1, 0, 3, 2)); + vals = _mm_add_ps(imp0, vals); + _mm_store_ps(&Values[o2][0], vals); + imp0 = imp1; + } + vals = _mm_loadl_pi(vals, (__m64*)&Values[o1][0]); + imp0 = _mm_movehl_ps(imp0, imp0); + vals = _mm_add_ps(imp0, vals); + _mm_storel_pi((__m64*)&Values[o1][0], vals); + } + else + { + for(i = 0;i < IrSize;i += 2) + { + const ALuint o = (Offset + i)&HRIR_MASK; + + coeffs = _mm_load_ps(&Coeffs[i][0]); + vals = _mm_load_ps(&Values[o][0]); + vals = _mm_add_ps(vals, _mm_mul_ps(lrlr, coeffs)); + _mm_store_ps(&Values[o][0], vals); + } } } diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h index b87d3526..e32e2313 100644 --- a/OpenAL32/Include/alMain.h +++ b/OpenAL32/Include/alMain.h @@ -761,15 +761,15 @@ void SetDefaultWFXChannelOrder(ALCdevice *device); const ALCchar *DevFmtTypeString(enum DevFmtType type); const ALCchar *DevFmtChannelsString(enum DevFmtChannels chans); -#define HRIR_BITS (5) +#define HRIR_BITS (7) #define HRIR_LENGTH (1<<HRIR_BITS) #define HRIR_MASK (HRIR_LENGTH-1) #define HRTFDELAY_BITS (20) #define HRTFDELAY_FRACONE (1<<HRTFDELAY_BITS) #define HRTFDELAY_MASK (HRTFDELAY_FRACONE-1) -void InitHrtf(void); -void FreeHrtf(void); const struct Hrtf *GetHrtf(ALCdevice *device); +void FreeHrtfs(void); +ALuint GetHrtfIrSize (const struct Hrtf *Hrtf); ALfloat CalcHrtfDelta(ALfloat oldGain, ALfloat newGain, const ALfloat olddir[3], const ALfloat newdir[3]); void GetLerpedHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat (*coeffs)[2], ALuint *delays); ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat delta, ALint counter, ALfloat (*coeffs)[2], ALuint *delays, ALfloat (*coeffStep)[2], ALint *delayStep); @@ -12,9 +12,9 @@ placement of sounds, making it seem as though they are coming from all around, including above and below the listener, instead of just to the front, back, and sides. -The built-in data set is based on the KEMAR HRTF diffuse data provided by MIT, -which can be found at <http://sound.media.mit.edu/resources/KEMAR.html>. It's -only available when using 44100hz playback. +The built-in data set is based on the KEMAR HRTF data provided by MIT, which +can be found at <http://sound.media.mit.edu/resources/KEMAR.html>. It's only +available when using 44100hz playback. External HRTF Data Sets @@ -26,68 +26,48 @@ own data sets, which could be better suited for their heads, or to work with stereo speakers instead of headphones, or to support more playback sample rates, for example. -The file format for the data sets is specified below. It uses little-endian -byte order. Certain data fields are restricted to specific values (these -restriction may be lifted in future versions of the lib). +The file format is specified below. It uses little-endian byte order. == -ALchar magic[8] = "MinPHR00"; +ALchar magic[8] = "MinPHR01"; ALuint sampleRate; -ALushort hrirCount; /* Required value: 828 */ -ALushort hrirSize; /* Required value: 32 */ -ALubyte evCount; /* Required value: 19 */ +ALushort hrirSize; /* Can be 8 to 128. */ +ALubyte evCount; /* Can be 5 to 128. */ -ALushort evOffset[evCount]; /* Required values: - { 0, 1, 13, 37, 73, 118, 174, 234, 306, 378, 450, 522, 594, 654, 710, 755, - 791, 815, 827 } */ +ALushort azCount[evCount]; /* Each can be 1 to 128. */ ALshort coefficients[hrirCount][hrirSize]; -ALubyte delays[hrirCount]; /* Element values must not exceed 127 */ +ALubyte delays[hrirCount]; /* Each can be 0 to 63. */ == The data is described as thus: -The file first starts with the 8-byte marker, "MinPHR00", to identify it as an +The file first starts with the 8-byte marker, "MinPHR01", to identify it as an HRTF data set. This is followed by an unsigned 32-bit integer, specifying the sample rate the data set is designed for (OpenAL Soft will not use it if the output device's playback rate doesn't match). -Afterward, an unsigned 16-bit integer specifies the total number of HRIR sets -(each HRIR set is a collection of impulse responses forming the coefficients -for a convolution filter). The next unsigned 16-bit integer specifies how many -samples are in each HRIR set (the number of coefficients in the filter). The -following unsigned 8-bit integer specifies the number of elevations used by the -data set. The elevations start at the bottom, and increment upwards. +Afterward, an unsigned 16-bit integer specifies how many sample points (or +finite impulse response filter coefficients) make up each HRIR. -Following this is an array of unsigned 16-bit integers, one for each elevation -which specifies the index offset to the start of the HRIR sets for each given -elevation (the number of HRIR sets at each elevation is infered by the offset -to the next elevation, or by the total count for the last elevation). +The following unsigned 8-bit integer specifies the number of elevations used +by the data set. The elevations start at the bottom (-90 degrees), and +increment upwards. Following this is an array of unsigned 16-bit integers, one +for each elevation which specifies the number of azimuths (and thus HRIRs) that +make up each elevation. Azimuths start clockwise from the front, constructing +a full circle for the left ear only. The right ear uses the same HRIRs but in +reverse (ie, left = angle, right = 360-angle). The actual coefficients follow. Each coefficient is a signed 16-bit sample, -with each HRIR set being a consecutive number of samples. For each elevation, -the HRIR sets first start with a neutral "in-front" set (that is, one that is -applied equally to the left and right outputs). After this, the sets follow a -clockwise pattern, constructing a full circle for the left ear only. The right -ear uses the same sets but in reverse (ie, left = angle, right = 360-angle). - -After the coefficients is an array of unsigned 8-bit delay values, one for each -HRIR set. This is the delay, in samples, after recieving an input sample before -before it's added in to the convolution filter that the corresponding HRIR set -operates on and gets heard. - - -Note that the HRTF data is expected to be minimum-phase reconstructed. The -time delays are handled by OpenAL Soft according to the specified delay[] -values, and afterward the samples are fed into the convolution filter using the -corresponding coefficients. This allows for less processing by using a shorter -convolution filter, as it skips the first coefficients that do little more than -cause a timed delay, as well as the tailing coefficients that are used to -equalize the length of all the sets and contribute nothing. - -For reference, the built-in data set uses a 32-sample convolution filter while +with each HRIR being a consecutive number of sample points. The HRIRs must be +minimum-phase. This allows the use of a smaller filter length, reducing +computation. For reference, the built-in data set uses a 32-point filter while even the smallest data set provided by MIT used a 128-sample filter (a 4x reduction by applying minimum-phase reconstruction). Theoretically, one could -further reduce the minimum-phase version down to a 16-sample convolution filter -with little quality loss. +further reduce the minimum-phase version down to a 16-point filter with only a +small reduction in quality. + +After the coefficients is an array of unsigned 8-bit delay values, one for +each HRIR. This is the propagation delay (in samples) a signal must wait before +being convolved with the corresponding minimum-phase HRIR filter. diff --git a/utils/makehrtf.c b/utils/makehrtf.c index 9f0a5d95..08861fb8 100644 --- a/utils/makehrtf.c +++ b/utils/makehrtf.c @@ -1,571 +1,1734 @@ -/** +/* * HRTF utility for producing and demonstrating the process of creating an * OpenAL Soft compatible HRIR data set. * - * It can currently make use of the 44.1 KHz diffuse and compact KEMAR HRIRs - * provided by MIT at: + * Copyright (C) 2011-2012 Christopher Fitzgerald + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Or visit: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html + * + * -------------------------------------------------------------------------- + * + * A big thanks goes out to all those whose work done in the field of + * binaural sound synthesis using measured HRTFs makes this utility and the + * OpenAL Soft implementation possible. + * + * The algorithm for diffuse-field equalization was adapted from the work + * done by Rio Emmanuel and Larcher Veronique of IRCAM and Bill Gardner of + * MIT Media Laboratory. It operates as follows: + * + * 1. Take the FFT of each HRIR and only keep the magnitude responses. + * 2. Calculate the diffuse-field power-average of all HRIRs weighted by + * their contribution to the total surface area covered by their + * measurement. + * 3. Take the diffuse-field average and limit its magnitude range. + * 4. Equalize the responses by using the inverse of the diffuse-field + * average. + * 5. Reconstruct the minimum-phase responses. + * 5. Zero the DC component. + * 6. IFFT the result and truncate to the desired-length minimum-phase FIR. + * + * The spherical head algorithm for calculating propagation delay was adapted + * from the paper: + * + * Modeling Interaural Time Difference Assuming a Spherical Head + * Joel David Miller + * Music 150, Musical Acoustics, Stanford University + * December 2, 2001 * - * http://sound.media.mit.edu/resources/KEMAR.html */ #include <stdio.h> #include <stdlib.h> -#include <math.h> +#include <stdarg.h> #include <string.h> +#include <ctype.h> +#include <math.h> + +// Needed for 64-bit unsigned integer. +#include "config.h" +// Rely (if naively) on OpenAL's header for the types used for serialization. #include "AL/al.h" #ifndef M_PI #define M_PI 3.14159265358979323846 #endif -#ifdef _MSC_VER -static double round(double val) -{ - if(val < 0.0) - return ceil(val - 0.5); - return floor(val + 0.5); -} -#endif +// The epsilon used to maintain signal stability. +#define EPSILON (1e-15) + +// Constants for accessing the token reader's ring buffer. +#define TR_RING_BITS (16) +#define TR_RING_SIZE (1 << TR_RING_BITS) +#define TR_RING_MASK (TR_RING_SIZE - 1) + +// The token reader's load interval in bytes. +#define TR_LOAD_SIZE (TR_RING_SIZE >> 2) + +// The maximum identifier length used when processing the data set +// definition. +#define MAX_IDENT_LEN (16) + +// The maximum path length used when processing filenames. +#define MAX_PATH_LEN (256) + +// The limits for the sample 'rate' metric in the data set definition. +#define MIN_RATE (32000) +#define MAX_RATE (96000) + +// The limits for the HRIR 'points' metric in the data set definition. +#define MIN_POINTS (16) +#define MAX_POINTS (8192) + +// The limits to the number of 'azimuths' listed in the data set definition. +#define MIN_EV_COUNT (5) +#define MAX_EV_COUNT (128) + +// The limits for each of the 'azimuths' listed in the data set definition. +#define MIN_AZ_COUNT (1) +#define MAX_AZ_COUNT (128) + +// The limits for the listener's head 'radius' in the data set definition. +#define MIN_RADIUS (0.05) +#define MAX_RADIUS (0.15) + +// The limits for the 'distance' from source to listener in the definition +// file. +#define MIN_DISTANCE (0.5) +#define MAX_DISTANCE (2.5) + +// The maximum number of channels that can be addressed for a WAVE file +// source listed in the data set definition. +#define MAX_WAVE_CHANNELS (65535) + +// The limits to the byte size for a binary source listed in the definition +// file. +#define MIN_BIN_SIZE (2) +#define MAX_BIN_SIZE (4) + +// The minimum number of significant bits for binary sources listed in the +// data set definition. The maximum is calculated from the byte size. +#define MIN_BIN_BITS (16) + +// The limits to the number of significant bits for an ASCII source listed in +// the data set definition. +#define MIN_ASCII_BITS (16) +#define MAX_ASCII_BITS (32) + +// The limits to the FFT window size override on the command line. +#define MIN_FFTSIZE (512) +#define MAX_FFTSIZE (16384) + +// The limits to the equalization range limit on the command line. +#define MIN_LIMIT (2.0) +#define MAX_LIMIT (120.0) + +// The limits to the truncation window size on the command line. +#define MIN_TRUNCSIZE (8) +#define MAX_TRUNCSIZE (128) + +// The truncation window size must be a multiple of the below value to allow +// for vectorized convolution. +#define MOD_TRUNCSIZE (8) + +// The defaults for the command line options. +#define DEFAULT_EQUALIZE (1) +#define DEFAULT_SURFACE (1) +#define DEFAULT_LIMIT (24.0) +#define DEFAULT_TRUNCSIZE (32) + +// The four-character-codes for RIFF/RIFX WAVE file chunks. +#define FOURCC_RIFF (0x46464952) // 'RIFF' +#define FOURCC_RIFX (0x58464952) // 'RIFX' +#define FOURCC_WAVE (0x45564157) // 'WAVE' +#define FOURCC_FMT (0x20746D66) // 'fmt ' +#define FOURCC_DATA (0x61746164) // 'data' +#define FOURCC_LIST (0x5453494C) // 'LIST' +#define FOURCC_WAVL (0x6C766177) // 'wavl' +#define FOURCC_SLNT (0x746E6C73) // 'slnt' + +// The supported wave formats. +#define WAVE_FORMAT_PCM (0x0001) +#define WAVE_FORMAT_IEEE_FLOAT (0x0003) +#define WAVE_FORMAT_EXTENSIBLE (0xFFFE) + +// The maximum propagation delay value supported by OpenAL Soft. +#define MAX_HRTD (63.0) -// The sample rate of the MIT HRIR data sets. -#define MIT_IR_RATE (44100) +// The OpenAL Soft HRTF format marker. It stands for minimum-phase head +// response protocol 01. +#define MHR_FORMAT ("MinPHR01") + +// Byte order for the serialization routines. +enum ByteOrderT { + BO_NONE = 0, + BO_LITTLE , + BO_BIG +}; -// The total number of used impulse responses from the MIT HRIR data sets. -#define MIT_IR_COUNT (828) +// Source format for the references listed in the data set definition. +enum SourceFormatT { + SF_NONE = 0, + SF_WAVE , // RIFF/RIFX WAVE file. + SF_BIN_LE , // Little-endian binary file. + SF_BIN_BE , // Big-endian binary file. + SF_ASCII // ASCII text file. +}; -// The size (in samples) of each HRIR in the MIT data sets. -#define MIT_IR_SIZE (128) +// Element types for the references listed in the data set definition. +enum ElementTypeT { + ET_NONE = 0, + ET_INT , // Integer elements. + ET_FP // Floating-point elements. +}; -// The total number of elevations given a step of 10 degrees. -#define MIT_EV_COUNT (19) +// Desired output format from the command line. +enum OutputFormatT { + OF_NONE = 0, + OF_MHR , // OpenAL Soft MHR data set file. + OF_TABLE // OpenAL Soft built-in table file (used when compiling). +}; -// The first elevation that the MIT data sets have HRIRs for. -#define MIT_EV_START (5) +// Unsigned integer type. +typedef unsigned int uint; -// The head radius (in meters) used by the MIT data sets. -#define MIT_RADIUS (0.09f) +// Serialization types. The trailing digit indicates the number of bytes. +typedef ALubyte uint1; -// The source to listener distance (in meters) used by the MIT data sets. -#define MIT_DISTANCE (1.4f) +typedef ALint int4; +typedef ALuint uint4; -// The resulting size (in samples) of a mininum-phase reconstructed HRIR. -#define MIN_IR_SIZE (32) +#if defined (HAVE_STDINT_H) +#include <stdint.h> -// The size (in samples) of the real cepstrum used in reconstruction. This -// needs to be large enough to reduce inaccuracy. -#define CEP_SIZE (8192) +typedef uint64_t uint8; +#elif defined (HAVE___INT64) +typedef unsigned __int64 uint8; +#elif (SIZEOF_LONG == 8) +typedef unsigned long uint8; +#elif (SIZEOF_LONG_LONG == 8) +typedef unsigned long long uint8; +#endif -// The OpenAL Soft HRTF format marker. It stands for minimum-phase head -// response protocol 00. -#define MHR_FORMAT ("MinPHR00") +typedef enum ByteOrderT ByteOrderT; +typedef enum SourceFormatT SourceFormatT; +typedef enum ElementTypeT ElementTypeT; +typedef enum OutputFormatT OutputFormatT; -typedef struct ComplexT ComplexT; +typedef struct TokenReaderT TokenReaderT; +typedef struct SourceRefT SourceRefT; typedef struct HrirDataT HrirDataT; -// A complex number type. -struct ComplexT { - float mVec [2]; +// Token reader state for parsing the data set definition. +struct TokenReaderT { + FILE * mFile; + const char * mName; + uint mLine, + mColumn; + char mRing [TR_RING_SIZE]; + size_t mIn, + mOut; }; -// The HRIR data definition. This can be used to add support for new HRIR -// sources in the future. +// Source reference state used when loading sources. +struct SourceRefT { + SourceFormatT mFormat; + ElementTypeT mType; + uint mSize; + int mBits; + uint mChannel, + mSkip, + mOffset; + char mPath [MAX_PATH_LEN + 1]; +}; + +// The HRIR metrics and data set used when loading, processing, and storing +// the resulting HRTF. struct HrirDataT { - int mIrRate, - mIrCount, - mIrSize, - mEvCount, - mEvStart; - const int * mEvOffset, - * mAzCount; - float mRadius, + uint mIrRate, + mIrCount; + size_t mIrSize, + mIrPoints, + mFftSize; + uint mEvCount, + mEvStart, + mAzCount [MAX_EV_COUNT], + mEvOffset [MAX_EV_COUNT]; + double mRadius, mDistance, * mHrirs, * mHrtds, mMaxHrtd; }; -// The linear index of the first HRIR for each elevation of the MIT data set. -static const int MIT_EV_OFFSET [MIT_EV_COUNT] = { - 0, 1, 13, 37, 73, 118, 174, 234, 306, 378, 450, 522, 594, 654, 710, 755, 791, 815, 827 -}, +/* Token reader routines for parsing text files. Whitespace is not + * significant. It can process tokens as identifiers, numbers (integer and + * floating-point), strings, and operators. Strings must be encapsulated by + * double-quotes and cannot span multiple lines. + */ -// The count of distinct azimuth steps for each elevation in the MIT data -// set. - MIT_AZ_COUNT [MIT_EV_COUNT] = { - 1, 12, 24, 36, 45, 56, 60, 72, 72, 72, 72, 72, 60, 56, 45, 36, 24, 12, 1 -}; +// Setup the reader on the given file. The filename can be NULL if no error +// output is desired. +static void TrSetup (FILE * fp, const char * filename, TokenReaderT * tr) { + const char * name = NULL; + char ch; + + tr -> mFile = fp; + name = filename; + // If a filename was given, store a pointer to the base name. + if (filename != NULL) { + while ((ch = (* filename)) != '\0') { + if ((ch == '/') || (ch == '\\')) + name = filename + 1; + filename ++; + } + } + tr -> mName = name; + tr -> mLine = 1; + tr -> mColumn = 1; + tr -> mIn = 0; + tr -> mOut = 0; +} -// Performs a forward Fast Fourier Transform. -static void FftProc (int n, const ComplexT * fftIn, ComplexT * fftOut) { - int m2, rk, k, m; - float a, b; - int i; - float wx, wy; - int j, km2; - float tx, ty, wyd; - - // Data copy and bit-reversal ordering. - m2 = (n >> 1); - rk = 0; - for (k = 0; k < n; k ++) { - fftOut [rk] . mVec [0] = fftIn [k] . mVec [0]; - fftOut [rk] . mVec [1] = fftIn [k] . mVec [1]; - if (k < (n - 1)) { - m = m2; - while (rk >= m) { - rk -= m; - m >>= 1; - } - rk += m; - } +// Prime the reader's ring buffer, and return a result indicating that there +// is text to process. +static int TrLoad (TokenReaderT * tr) { + size_t toLoad, in, count; + + toLoad = TR_RING_SIZE - (tr -> mIn - tr -> mOut); + if ((toLoad >= TR_LOAD_SIZE) && (! feof (tr -> mFile))) { + // Load TR_LOAD_SIZE (or less if at the end of the file) per read. + toLoad = TR_LOAD_SIZE; + in = tr -> mIn & TR_RING_MASK; + count = TR_RING_SIZE - in; + if (count < toLoad) { + tr -> mIn += fread (& tr -> mRing [in], 1, count, tr -> mFile); + tr -> mIn += fread (& tr -> mRing [0], 1, toLoad - count, tr -> mFile); + } else { + tr -> mIn += fread (& tr -> mRing [in], 1, toLoad, tr -> mFile); + } + if (tr -> mOut >= TR_RING_SIZE) { + tr -> mOut -= TR_RING_SIZE; + tr -> mIn -= TR_RING_SIZE; + } + } + if (tr -> mIn > tr -> mOut) + return (1); + return (0); +} + +// Error display routine. Only displays when the base name is not NULL. +static void TrErrorVA (const TokenReaderT * tr, uint line, uint column, const char * format, va_list argPtr) { + if (tr -> mName != NULL) { + fprintf (stderr, "Error (%s:%d:%d): ", tr -> mName, line, column); + vfprintf (stderr, format, argPtr); + } +} + +// Used to display an error at a saved line/column. +static void TrErrorAt (const TokenReaderT * tr, uint line, uint column, const char * format, ...) { + va_list argPtr; + + va_start (argPtr, format); + TrErrorVA (tr, line, column, format, argPtr); + va_end (argPtr); +} + +// Used to display an error at the current line/column. +static void TrError (const TokenReaderT * tr, const char * format, ...) { + va_list argPtr; + + va_start (argPtr, format); + TrErrorVA (tr, tr -> mLine, tr -> mColumn, format, argPtr); + va_end (argPtr); +} + +// Skips to the next line. +static void TrSkipLine (TokenReaderT * tr) { + char ch; + + while (TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + tr -> mOut ++; + if (ch == '\n') { + tr -> mLine ++; + tr -> mColumn = 1; + break; + } + tr -> mColumn ++; + } +} + +// Skips to the next token. +static int TrSkipWhitespace (TokenReaderT * tr) { + char ch; + + while (TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if (isspace (ch)) { + tr -> mOut ++; + if (ch == '\n') { + tr -> mLine ++; + tr -> mColumn = 1; + } else { + tr -> mColumn ++; + } + } else if (ch == '#') { + TrSkipLine (tr); + } else { + return (1); + } + } + return (0); +} + +// Get the line and/or column of the next token (or the end of input). +static void TrIndication (TokenReaderT * tr, uint * line, uint * column) { + TrSkipWhitespace (tr); + if (line != NULL) + (* line) = tr -> mLine; + if (column != NULL) + (* column) = tr -> mColumn; +} + +// Checks to see if a token is the given operator. It does not display any +// errors and will not proceed to the next token. +static int TrIsOperator (TokenReaderT * tr, const char * op) { + size_t out, len; + char ch; + + if (! TrSkipWhitespace (tr)) + return (0); + out = tr -> mOut; + len = 0; + while ((op [len] != '\0') && (out < tr -> mIn)) { + ch = tr -> mRing [out & TR_RING_MASK]; + if (ch != op [len]) + break; + len ++; + out ++; + } + if (op [len] == '\0') + return (1); + return (0); +} + +/* The TrRead*() routines obtain the value of a matching token type. They + * display type, form, and boundary errors and will proceed to the next + * token. + */ + +// Reads and validates an identifier token. +static int TrReadIdent (TokenReaderT * tr, const size_t maxLen, char * ident) { + uint col; + size_t len; + char ch; + + col = tr -> mColumn; + if (TrSkipWhitespace (tr)) { + col = tr -> mColumn; + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if ((ch == '_') || isalpha (ch)) { + len = 0; + do { + if (len < maxLen) + ident [len] = ch; + len ++; + tr -> mOut ++; + if (! TrLoad (tr)) + break; + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + } while ((ch == '_') || isdigit (ch) || isalpha (ch)); + tr -> mColumn += len; + if (len > maxLen) { + TrErrorAt (tr, tr -> mLine, col, "Identifier is too long.\n"); + return (0); + } + ident [len] = '\0'; + return (1); + } } - // Perform the FFT. - m2 = 1; - for (m = 2; m <= n; m <<= 1) { - a = sin (M_PI / m); - a = 2.0f * a * a; - b = sin (2.0f * M_PI / m); - for (i = 0; i < n; i += m) { - wx = 1.0f; - wy = 0.0f; - for (k = i, j = 0; j < m2; k ++, j ++) { - km2 = k + m2; - tx = (wx * fftOut [km2] . mVec [0]) - (wy * fftOut [km2] . mVec [1]); - ty = (wx * fftOut [km2] . mVec [1]) + (wy * fftOut [km2] . mVec [0]); - fftOut [km2] . mVec [0] = fftOut [k] . mVec [0] - tx; - fftOut [km2] . mVec [1] = fftOut [k] . mVec [1] - ty; - fftOut [k] . mVec [0] += tx; - fftOut [k] . mVec [1] += ty; - wyd = (a * wy) - (b * wx); - wx -= (a * wx) + (b * wy); - wy -= wyd; + TrErrorAt (tr, tr -> mLine, col, "Expected an identifier.\n"); + return (0); +} + +// Reads and validates (including bounds) an integer token. +static int TrReadInt (TokenReaderT * tr, const int loBound, const int hiBound, int * value) { + uint col, digis; + size_t len; + char ch, temp [64 + 1]; + + col = tr -> mColumn; + if (TrSkipWhitespace (tr)) { + col = tr -> mColumn; + len = 0; + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if ((ch == '+') || (ch == '-')) { + temp [len] = ch; + len ++; + tr -> mOut ++; + } + digis = 0; + while (TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if (! isdigit (ch)) + break; + if (len < 64) + temp [len] = ch; + len ++; + digis ++; + tr -> mOut ++; + } + tr -> mColumn += len; + if ((digis > 0) && (ch != '.') && (! isalpha (ch))) { + if (len > 64) { + TrErrorAt (tr, tr -> mLine, col, "Integer is too long."); + return (0); + } + temp [len] = '\0'; + (* value) = strtol (temp, NULL, 10); + if (((* value) < loBound) || ((* value) > hiBound)) { + TrErrorAt (tr, tr -> mLine, col, "Expected a value from %d to %d.\n", loBound, hiBound); + return (0); + } + return (1); + } + } + TrErrorAt (tr, tr -> mLine, col, "Expected an integer.\n"); + return (0); +} + +// Reads and validates (including bounds) a float token. +static int TrReadFloat (TokenReaderT * tr, const double loBound, const double hiBound, double * value) { + uint col, digis; + size_t len; + char ch, temp [64 + 1]; + + col = tr -> mColumn; + if (TrSkipWhitespace (tr)) { + col = tr -> mColumn; + len = 0; + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if ((ch == '+') || (ch == '-')) { + temp [len] = ch; + len ++; + tr -> mOut ++; + } + digis = 0; + while (TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if (! isdigit (ch)) + break; + if (len < 64) + temp [len] = ch; + len ++; + digis ++; + tr -> mOut ++; + } + if (ch == '.') { + if (len < 64) + temp [len] = ch; + len ++; + tr -> mOut ++; + } + while (TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if (! isdigit (ch)) + break; + if (len < 64) + temp [len] = ch; + len ++; + digis ++; + tr -> mOut ++; + } + if (digis > 0) { + if ((ch == 'E') || (ch == 'e')) { + if (len < 64) + temp [len] = ch; + len ++; + digis = 0; + tr -> mOut ++; + if ((ch == '+') || (ch == '-')) { + if (len < 64) + temp [len] = ch; + len ++; + tr -> mOut ++; + } + while (TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if (! isdigit (ch)) + break; + if (len < 64) + temp [len] = ch; + len ++; + digis ++; + tr -> mOut ++; + } + } + tr -> mColumn += len; + if ((digis > 0) && (ch != '.') && (! isalpha (ch))) { + if (len > 64) { + TrErrorAt (tr, tr -> mLine, col, "Float is too long."); + return (0); + } + temp [len] = '\0'; + (* value) = strtod (temp, NULL); + if (((* value) < loBound) || ((* value) > hiBound)) { + TrErrorAt (tr, tr -> mLine, col, "Expected a value from %f to %f.\n", loBound, hiBound); + return (0); + } + return (1); + } + } else { + tr -> mColumn += len; + } + } + TrErrorAt (tr, tr -> mLine, col, "Expected a float.\n"); + return (0); +} + +// Reads and validates a string token. +static int TrReadString (TokenReaderT * tr, const size_t maxLen, char * text) { + uint col; + size_t len; + char ch; + + col = tr -> mColumn; + if (TrSkipWhitespace (tr)) { + col = tr -> mColumn; + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if (ch == '\"') { + tr -> mOut ++; + len = 0; + while (TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + tr -> mOut ++; + if (ch == '\"') + break; + if (ch == '\n') { + TrErrorAt (tr, tr -> mLine, col, "Unterminated string at end of line.\n"); + return (0); } - } - m2 = m; - } -} - -// Performs an inverse Fast Fourier Transform. -static void FftInvProc (int n, const ComplexT * fftIn, ComplexT * fftOut) { - int m2, rk, k, m; - float a, b; - int i; - float wx, wy; - int j, km2; - float tx, ty, wyd, invn; - - // Data copy and bit-reversal ordering. - m2 = (n >> 1); - rk = 0; - for (k = 0; k < n; k ++) { - fftOut [rk] . mVec [0] = fftIn [k] . mVec [0]; - fftOut [rk] . mVec [1] = fftIn [k] . mVec [1]; - if (k < (n - 1)) { - m = m2; - while (rk >= m) { - rk -= m; - m >>= 1; - } - rk += m; - } + if (len < maxLen) + text [len] = ch; + len ++; + } + if (ch != '\"') { + tr -> mColumn += 1 + len; + TrErrorAt (tr, tr -> mLine, col, "Unterminated string at end of input.\n"); + return (0); + } + tr -> mColumn += 2 + len; + if (len > maxLen) { + TrErrorAt (tr, tr -> mLine, col, "String is too long.\n"); + return (0); + } + text [len] = '\0'; + return (1); + } + } + TrErrorAt (tr, tr -> mLine, col, "Expected a string.\n"); + return (0); +} + +// Reads and validates the given operator. +static int TrReadOperator (TokenReaderT * tr, const char * op) { + uint col; + size_t len; + char ch; + + col = tr -> mColumn; + if (TrSkipWhitespace (tr)) { + col = tr -> mColumn; + len = 0; + while ((op [len] != '\0') && TrLoad (tr)) { + ch = tr -> mRing [tr -> mOut & TR_RING_MASK]; + if (ch != op [len]) + break; + len ++; + tr -> mOut ++; + } + tr -> mColumn += len; + if (op [len] == '\0') + return (1); } - // Perform the IFFT. - m2 = 1; - for (m = 2; m <= n; m <<= 1) { - a = sin (M_PI / m); - a = 2.0f * a * a; - b = -sin (2.0f * M_PI / m); - for (i = 0; i < n; i += m) { - wx = 1.0f; - wy = 0.0f; - for (k = i, j = 0; j < m2; k ++, j ++) { - km2 = k + m2; - tx = (wx * fftOut [km2] . mVec [0]) - (wy * fftOut [km2] . mVec [1]); - ty = (wx * fftOut [km2] . mVec [1]) + (wy * fftOut [km2] . mVec [0]); - fftOut [km2] . mVec [0] = fftOut [k] . mVec [0] - tx; - fftOut [km2] . mVec [1] = fftOut [k] . mVec [1] - ty; - fftOut [k] . mVec [0] += tx; - fftOut [k] . mVec [1] += ty; - wyd = (a * wy) - (b * wx); - wx -= (a * wx) + (b * wy); - wy -= wyd; + TrErrorAt (tr, tr -> mLine, col, "Expected '%s' operator.\n", op); + return (0); +} + +/* Performs a string substitution. Any case-insensitive occurrences of the + * pattern string are replaced with the replacement string. The result is + * truncated if necessary. + */ +static int StrSubst (const char * in, const char * pat, const char * rep, const size_t maxLen, char * out) { + size_t inLen, patLen, repLen; + size_t si, di; + int truncated; + + inLen = strlen (in); + patLen = strlen (pat); + repLen = strlen (rep); + si = 0; + di = 0; + truncated = 0; + while ((si < inLen) && (di < maxLen)) { + if (patLen <= (inLen - si)) { + if (strncasecmp (& in [si], pat, patLen) == 0) { + if (repLen > (maxLen - di)) { + repLen = maxLen - di; + truncated = 1; } - } - m2 = m; + strncpy (& out [di], rep, repLen); + si += patLen; + di += repLen; + } + } + out [di] = in [si]; + si ++; + di ++; } - // Normalize the samples. - invn = 1.0f / n; - for (i = 0; i < n; i ++) { - fftOut [i] . mVec [0] *= invn; - fftOut [i] . mVec [1] *= invn; + if (si < inLen) + truncated = 1; + out [di] = '\0'; + return (! truncated); +} + +// Provide missing math routines for MSVC. +#ifdef _MSC_VER +static double round (double val) { + if (val < 0.0) + return (ceil (val - 0.5)); + return (floor (val + 0.5)); +} + +static double fmin (double a, double b) { + return ((a < b) ? a : b); +} + +static double fmax (double a, double b) { + return ((a > b) ? a : b); +} +#endif + +// Simple clamp routine. +static double Clamp (const double val, const double lower, const double upper) { + return (fmin (fmax (val, lower), upper)); +} + +// Performs linear interpolation. +static double Lerp (const double a, const double b, const double f) { + return (a + (f * (b - a))); +} + +// Performs a high-passed triangular probability density function dither from +// a double to an integer. It assumes the input sample is already scaled. +static int HpTpdfDither (const double in, int * hpHist) { + const double PRNG_SCALE = 1.0 / RAND_MAX; + int prn; + double out; + + prn = rand (); + out = round (in + (PRNG_SCALE * (prn - (* hpHist)))); + (* hpHist) = prn; + return ((int) out); +} + +// Allocates an array of doubles. +static double * CreateArray (const size_t n) { + double * a = NULL; + + a = (double *) calloc (n, sizeof (double)); + if (a == NULL) { + fprintf (stderr, "Error: Out of memory.\n"); + exit (-1); } + return (a); } -// Complex absolute value. -static void ComplexAbs (const ComplexT * in, ComplexT * out) { - out -> mVec [0] = sqrt ((in -> mVec [0] * in -> mVec [0]) + (in -> mVec [1] * in -> mVec [1])); - out -> mVec [1] = 0.0f; +// Frees an array of doubles. +static void DestroyArray (const double * a) { + free ((void *) a); } -// Complex logarithm. -static void ComplexLog (const ComplexT * in, ComplexT * out) { - float r, t; +// Complex number routines. All outputs must be non-NULL. + +// Magnitude/absolute value. +static double ComplexAbs (const double r, const double i) { + return (sqrt ((r * r) + (i * i))); +} - r = sqrt ((in -> mVec [0] * in -> mVec [0]) + (in -> mVec [1] * in -> mVec [1])); - t = atan2 (in -> mVec [1], in -> mVec [0]); - if (t < 0.0f) - t += 2.0f * M_PI; - out -> mVec [0] = log (r); - out -> mVec [1] = t; +// Multiply. +static void ComplexMul (const double aR, const double aI, const double bR, const double bI, double * outR, double * outI) { + (* outR) = (aR * bR) - (aI * bI); + (* outI) = (aI * bR) + (aR * bI); } -// Complex exponent. -static void ComplexExp (const ComplexT * in, ComplexT * out) { - float e; +// Base-e exponent. +static void ComplexExp (const double inR, const double inI, double * outR, double * outI) { + double e; - e = exp (in -> mVec [0]); - out -> mVec [0] = e * cos (in -> mVec [1]); - out -> mVec [1] = e * sin (in -> mVec [1]); + e = exp (inR); + (* outR) = e * cos (inI); + (* outI) = e * sin (inI); } -// Calculates the real cepstrum of a given impulse response. It currently -// uses a fixed cepstrum size. To make this more robust, it should be -// rewritten to handle a variable size cepstrum. -static void RealCepstrum (int irSize, const float * ir, float cep [CEP_SIZE]) { - ComplexT in [CEP_SIZE], out [CEP_SIZE]; - int index; +/* Fast Fourier transform routines. The number of points must be a power of + * two. In-place operation is possible only if both the real and imaginary + * parts are in-place together. + */ - for (index = 0; index < irSize; index ++) { - in [index] . mVec [0] = ir [index]; - in [index] . mVec [1] = 0.0f; +// Performs bit-reversal ordering. +static void FftArrange (const size_t n, const double * inR, const double * inI, double * outR, double * outI) { + size_t rk, k, m; + double tempR, tempI; + + if ((inR == outR) && (inI == outI)) { + // Handle in-place arrangement. + rk = 0; + for (k = 0; k < n; k ++) { + if (rk > k) { + tempR = inR [rk]; + tempI = inI [rk]; + outR [rk] = inR [k]; + outI [rk] = inI [k]; + outR [k] = tempR; + outI [k] = tempI; + } + m = n; + while (rk & (m >>= 1)) + rk &= ~m; + rk |= m; + } + } else { + // Handle copy arrangement. + rk = 0; + for (k = 0; k < n; k ++) { + outR [rk] = inR [k]; + outI [rk] = inI [k]; + m = n; + while (rk & (m >>= 1)) + rk &= ~m; + rk |= m; + } } - for (; index < CEP_SIZE; index ++) { - in [index] . mVec [0] = 0.0f; - in [index] . mVec [1] = 0.0f; +} + +// Performs the summation. +static void FftSummation (const size_t n, const double s, double * re, double * im) { + double pi; + size_t m, m2; + double vR, vI, wR, wI; + size_t i, k, mk; + double tR, tI; + + pi = s * M_PI; + for (m = 1, m2 = 2; m < n; m <<= 1, m2 <<= 1) { + // v = Complex (-2.0 * sin (0.5 * pi / m) * sin (0.5 * pi / m), -sin (pi / m)) + vR = sin (0.5 * pi / m); + vR = -2.0 * vR * vR; + vI = -sin (pi / m); + // w = Complex (1.0, 0.0) + wR = 1.0; + wI = 0.0; + for (i = 0; i < m; i ++) { + for (k = i; k < n; k += m2) { + mk = k + m; + // t = ComplexMul (w, out [km2]) + tR = (wR * re [mk]) - (wI * im [mk]); + tI = (wR * im [mk]) + (wI * re [mk]); + // out [mk] = ComplexSub (out [k], t) + re [mk] = re [k] - tR; + im [mk] = im [k] - tI; + // out [k] = ComplexAdd (out [k], t) + re [k] += tR; + im [k] += tI; + } + // t = ComplexMul (v, w) + tR = (vR * wR) - (vI * wI); + tI = (vR * wI) + (vI * wR); + // w = ComplexAdd (w, t) + wR += tR; + wI += tI; + } } - FftProc (CEP_SIZE, in, out); - for (index = 0; index < CEP_SIZE; index ++) { - ComplexAbs (& out [index], & out [index]); - if (out [index] . mVec [0] < 0.000001f) - out [index] . mVec [0] = 0.000001f; - ComplexLog (& out [index], & in [index]); +} + +// Performs a forward FFT. +static void FftForward (const size_t n, const double * inR, const double * inI, double * outR, double * outI) { + FftArrange (n, inR, inI, outR, outI); + FftSummation (n, 1.0, outR, outI); +} + +// Performs an inverse FFT. +static void FftInverse (const size_t n, const double * inR, const double * inI, double * outR, double * outI) { + double f; + size_t i; + + FftArrange (n, inR, inI, outR, outI); + FftSummation (n, -1.0, outR, outI); + f = 1.0 / n; + for (i = 0; i < n; i ++) { + outR [i] *= f; + outI [i] *= f; } - FftInvProc (CEP_SIZE, in, out); - for (index = 0; index < CEP_SIZE; index ++) - cep [index] = out [index] . mVec [0]; } -// Reconstructs the minimum-phase impulse response for a given real cepstrum. -// Like the above function, this should eventually be modified to handle a -// variable size cepstrum. -static void MinimumPhase (const float cep [CEP_SIZE], int irSize, float * mpIr) { - ComplexT in [CEP_SIZE], out [CEP_SIZE]; - int index; +/* Calculate the complex helical sequence (or discrete-time analytical + * signal) of the given input using the Hilbert transform. Given the + * negative natural logarithm of a signal's magnitude response, the imaginary + * components can be used as the angles for minimum-phase reconstruction. + */ +static void Hilbert (const size_t n, const double * in, double * outR, double * outI) { + size_t i; + + if (in == outR) { + // Handle in-place operation. + for (i = 0; i < n; i ++) + outI [i] = 0.0; + } else { + // Handle copy operation. + for (i = 0; i < n; i ++) { + outR [i] = in [i]; + outI [i] = 0.0; + } + } + FftForward (n, outR, outI, outR, outI); + /* Currently the Fourier routines operate only on point counts that are + * powers of two. If that changes and n is odd, the following conditional + * should be: i < (n + 1) / 2. + */ + for (i = 1; i < (n / 2); i ++) { + outR [i] *= 2.0; + outI [i] *= 2.0; + } + // If n is odd, the following increment should be skipped. + i ++; + for (; i < n; i ++) { + outR [i] = 0.0; + outI [i] = 0.0; + } + FftInverse (n, outR, outI, outR, outI); +} + +/* Calculate the magnitude response of the given input. This is used in + * place of phase decomposition, since the phase residuals are discarded for + * minimum phase reconstruction. The mirrored half of the response is also + * discarded. + */ +static void MagnitudeResponse (const size_t n, const double * inR, const double * inI, double * out) { + const size_t m = 1 + (n / 2); + size_t i; + + for (i = 0; i < m; i ++) + out [i] = fmax (ComplexAbs (inR [i], inI [i]), EPSILON); +} - in [0] . mVec [0] = cep [0]; - for (index = 1; index < (CEP_SIZE / 2); index ++) - in [index] . mVec [0] = 2.0f * cep [index]; - if ((CEP_SIZE % 2) != 1) { - in [index] . mVec [0] = cep [index]; - index ++; +/* Apply a range limit (in dB) to the given magnitude response. This is used + * to adjust the effects of the diffuse-field average on the equalization + * process. + */ +static void LimitMagnitudeResponse (const size_t n, const double limit, const double * in, double * out) { + const size_t m = 1 + (n / 2); + double halfLim; + size_t i, lower, upper; + double ave; + + halfLim = limit / 2.0; + // Convert the response to dB. + for (i = 0; i < m; i ++) + out [i] = 20.0 * log10 (in [i]); + // Use six octaves to calculate the average magnitude of the signal. + lower = ((size_t) ceil (n / pow (2.0, 8.0))) - 1; + upper = ((size_t) floor (n / pow (2.0, 2.0))) - 1; + ave = 0.0; + for (i = lower; i <= upper; i ++) + ave += out [i]; + ave /= upper - lower + 1; + // Keep the response within range of the average magnitude. + for (i = 0; i < m; i ++) + out [i] = Clamp (out [i], ave - halfLim, ave + halfLim); + // Convert the response back to linear magnitude. + for (i = 0; i < m; i ++) + out [i] = pow (10.0, out [i] / 20.0); +} + +/* Reconstructs the minimum-phase component for the given magnitude response + * of a signal. This is equivalent to phase recomposition, sans the missing + * residuals (which were discarded). The mirrored half of the response is + * reconstructed. + */ +static void MinimumPhase (const size_t n, const double * in, double * outR, double * outI) { + const size_t m = 1 + (n / 2); + double * mags = NULL; + size_t i; + double aR, aI; + + mags = CreateArray (n); + for (i = 0; i < m; i ++) { + mags [i] = fmax (in [i], EPSILON); + outR [i] = -log (mags [i]); } - for (; index < CEP_SIZE; index ++) - in [index] . mVec [0] = 0.0f; - for (index = 0; index < CEP_SIZE; index ++) - in [index] . mVec [1] = 0.0f; - FftProc (CEP_SIZE, in, out); - for (index = 0; index < CEP_SIZE; index ++) - ComplexExp (& out [index], & in [index]); - FftInvProc (CEP_SIZE, in, out); - for (index = 0; index < irSize; index ++) - mpIr [index] = out [index] . mVec [0]; + for (; i < n; i ++) { + mags [i] = mags [n - i]; + outR [i] = outR [n - i]; + } + Hilbert (n, outR, outR, outI); + // Remove any DC offset the filter has. + outR [0] = 0.0; + outI [0] = 0.0; + for (i = 1; i < n; i ++) { + ComplexExp (0.0, outI [i], & aR, & aI); + ComplexMul (mags [i], 0.0, aR, aI, & outR [i], & outI [i]); + } + DestroyArray (mags); } -// Calculate the left-ear time delay using a spherical head model. -static float CalcLTD (float ev, float az, float rad, float dist) { - float azp, dlp, l, al; +// Read a binary value of the specified byte order and byte size from a file, +// storing it as a 32-bit unsigned integer. +static int ReadBin4 (FILE * fp, const char * filename, const ByteOrderT order, const uint bytes, uint4 * out) { + uint1 in [4]; + uint4 accum; + uint i; - azp = asin (cos (ev) * sin (az)); - dlp = sqrt ((dist * dist) + (rad * rad) + (2.0f * dist * rad * sin (azp))); - l = sqrt ((dist * dist) - (rad * rad)); - al = (0.5f * M_PI) + azp; - if (dlp > l) - dlp = l + (rad * (al - acos (rad / dist))); - return (dlp / 343.3f); + if (fread (in, 1, bytes, fp) != bytes) { + fprintf (stderr, "Error: Bad read from file '%s'.\n", filename); + return (0); + } + accum = 0; + switch (order) { + case BO_LITTLE : + for (i = 0; i < bytes; i ++) + accum = (accum << 8) | in [bytes - i - 1]; + break; + case BO_BIG : + for (i = 0; i < bytes; i ++) + accum = (accum << 8) | in [i]; + break; + default : + break; + } + (* out) = accum; + return (1); } -// Read a 16-bit little-endian integer from a file and convert it to a 32-bit -// floating-point value in the range of -1.0 to 1.0. -static int ReadInt16LeAsFloat32 (const char * fileName, FILE * fp, float * val) { - ALubyte vb [2]; - ALushort vw; +// Read a binary value of the specified byte order from a file, storing it as +// a 64-bit unsigned integer. +static int ReadBin8 (FILE * fp, const char * filename, const ByteOrderT order, uint8 * out) { + uint1 in [8]; + uint8 accum; + uint i; - if (fread (vb, 1, sizeof (vb), fp) != sizeof (vb)) { - fclose (fp); - fprintf (stderr, "Error reading from file, '%s'.\n", fileName); + if (fread (in, 1, 8, fp) != 8) { + fprintf (stderr, "Error: Bad read from file '%s'.\n", filename); return (0); } - vw = (((unsigned short) vb [1]) << 8) | vb [0]; - (* val) = ((short) vw) / 32768.0f; + accum = 0ULL; + switch (order) { + case BO_LITTLE : + for (i = 0; i < 8; i ++) + accum = (accum << 8) | in [8 - i - 1]; + break; + case BO_BIG : + for (i = 0; i < 8; i ++) + accum = (accum << 8) | in [i]; + break; + default : + break; + } + (* out) = accum; return (1); } -// Write a string to a file. -static int WriteString (const char * val, const char * fileName, FILE * fp) { +// Write an ASCII string to a file. +static int WriteAscii (const char * out, FILE * fp, const char * filename) { size_t len; - len = strlen (val); - if (fwrite (val, 1, len, fp) != len) { + len = strlen (out); + if (fwrite (out, 1, len, fp) != len) { fclose (fp); - fprintf (stderr, "Error writing to file, '%s'.\n", fileName); + fprintf (stderr, "Error: Bad write to file '%s'.\n", filename); return (0); } return (1); } -// Write a 32-bit floating-point value in the range of -1.0 to 1.0 to a file -// as a 16-bit little-endian integer. -static int WriteFloat32AsInt16Le (float val, const char * fileName, FILE * fp) { - ALshort vw; - ALubyte vb [2]; - - vw = (short) round (32767.0f * val); - vb [0] = vw & 0x00FF; - vb [1] = (vw >> 8) & 0x00FF; - if (fwrite (vb, 1, sizeof (vb), fp) != sizeof (vb)) { - fclose (fp); - fprintf (stderr, "Error writing to file, '%s'.\n", fileName); +// Write a binary value of the given byte order and byte size to a file, +// loading it from a 32-bit unsigned integer. +static int WriteBin4 (const ByteOrderT order, const uint bytes, const uint4 in, FILE * fp, const char * filename) { + uint1 out [4]; + uint i; + + switch (order) { + case BO_LITTLE : + for (i = 0; i < bytes; i ++) + out [i] = (in >> (i * 8)) & 0x000000FF; + break; + case BO_BIG : + for (i = 0; i < bytes; i ++) + out [bytes - i - 1] = (in >> (i * 8)) & 0x000000FF; + break; + default : + break; + } + if (fwrite (out, 1, bytes, fp) != bytes) { + fprintf (stderr, "Error: Bad write to file '%s'.\n", filename); return (0); } return (1); } -// Write a 32-bit little-endian unsigned integer to a file. -static int WriteUInt32Le (ALuint val, const char * fileName, FILE * fp) { - ALubyte vb [4]; +/* Read a binary value of the specified type, byte order, and byte size from + * a file, converting it to a double. For integer types, the significant + * bits are used to normalize the result. The sign of bits determines + * whether they are padded toward the MSB (negative) or LSB (positive). + * Floating-point types are not normalized. + */ +static int ReadBinAsDouble (FILE * fp, const char * filename, const ByteOrderT order, const ElementTypeT type, const uint bytes, const int bits, double * out) { + union { + uint4 ui; + int4 i; + float f; + } v4; + union { + uint8 ui; + double f; + } v8; + + (* out) = 0.0; + if (bytes > 4) { + if (! ReadBin8 (fp, filename, order, & v8 . ui)) + return (0); + if (type == ET_FP) + (* out) = v8 . f; + } else { + if (! ReadBin4 (fp, filename, order, bytes, & v4 . ui)) + return (0); + if (type == ET_FP) { + (* out) = (double) v4 . f; + } else { + if (bits > 0) + v4 . ui >>= (8 * bytes) - bits; + else + v4 . ui &= (0xFFFFFFFF >> (32 + bits)); + if (v4 . ui & (1 << (abs (bits) - 1))) + v4 . ui |= (0xFFFFFFFF << abs (bits)); + (* out) = v4 . i / ((double) (1 << (abs (bits) - 1))); + } + } + return (1); +} + +/* Read an ascii value of the specified type from a file, converting it to a + * double. For integer types, the significant bits are used to normalize the + * result. The sign of the bits should always be positive. This also skips + * up to one separator character before the element itself. + */ +static int ReadAsciiAsDouble (TokenReaderT * tr, const char * filename, const ElementTypeT type, const uint bits, double * out) { + int v; + + if (TrIsOperator (tr, ",")) + TrReadOperator (tr, ","); + else if (TrIsOperator (tr, ":")) + TrReadOperator (tr, ":"); + else if (TrIsOperator (tr, ";")) + TrReadOperator (tr, ";"); + else if (TrIsOperator (tr, "|")) + TrReadOperator (tr, "|"); + if (type == ET_FP) { + if (! TrReadFloat (tr, -1.0 / 0.0, 1.0 / 0.0, out)) { + fprintf (stderr, "Error: Bad read from file '%s'.\n", filename); + return (0); + } + } else { + if (! TrReadInt (tr, -(1 << (bits - 1)), (1 << (bits - 1)) - 1, & v)) { + fprintf (stderr, "Error: Bad read from file '%s'.\n", filename); + return (0); + } + (* out) = v / ((double) ((1 << (bits - 1)) - 1)); + } + return (1); +} - vb [0] = val & 0x000000FF; - vb [1] = (val >> 8) & 0x000000FF; - vb [2] = (val >> 16) & 0x000000FF; - vb [3] = (val >> 24) & 0x000000FF; - if (fwrite (vb, 1, sizeof (vb), fp) != sizeof (vb)) { - fclose (fp); - fprintf (stderr, "Error writing to file, '%s'.\n", fileName); +// Read the RIFF/RIFX WAVE format chunk from a file, validating it against +// the source parameters and data set metrics. +static int ReadWaveFormat (FILE * fp, const ByteOrderT order, const uint hrirRate, SourceRefT * src) { + uint4 fourCC, chunkSize; + uint4 format, channels, rate, dummy, block, size, bits; + + chunkSize = 0; + do { + if (chunkSize > 0) + fseek (fp, chunkSize, SEEK_CUR); + if ((! ReadBin4 (fp, src -> mPath, BO_LITTLE, 4, & fourCC)) || + (! ReadBin4 (fp, src -> mPath, order, 4, & chunkSize))) + return (0); + } while (fourCC != FOURCC_FMT); + if ((! ReadBin4 (fp, src -> mPath, order, 2, & format)) || + (! ReadBin4 (fp, src -> mPath, order, 2, & channels)) || + (! ReadBin4 (fp, src -> mPath, order, 4, & rate)) || + (! ReadBin4 (fp, src -> mPath, order, 4, & dummy)) || + (! ReadBin4 (fp, src -> mPath, order, 2, & block))) + return (0); + block /= channels; + if (chunkSize > 14) { + if (! ReadBin4 (fp, src -> mPath, order, 2, & size)) + return (0); + size /= 8; + if (block > size) + size = block; + } else { + size = block; + } + if (format == WAVE_FORMAT_EXTENSIBLE) { + fseek (fp, 2, SEEK_CUR); + if (! ReadBin4 (fp, src -> mPath, order, 2, & bits)) + return (0); + if (bits == 0) + bits = 8 * size; + fseek (fp, 4, SEEK_CUR); + if (! ReadBin4 (fp, src -> mPath, order, 2, & format)) + return (0); + fseek (fp, chunkSize - 26, SEEK_CUR); + } else { + bits = 8 * size; + if (chunkSize > 14) + fseek (fp, chunkSize - 16, SEEK_CUR); + else + fseek (fp, chunkSize - 14, SEEK_CUR); + } + if ((format != WAVE_FORMAT_PCM) && (format != WAVE_FORMAT_IEEE_FLOAT)) { + fprintf (stderr, "Error: Unsupported WAVE format in file '%s'.\n", src -> mPath); return (0); } + if (src -> mChannel >= channels) { + fprintf (stderr, "Error: Missing source channel in WAVE file '%s'.\n", src -> mPath); + return (0); + } + if (rate != hrirRate) { + fprintf (stderr, "Error: Mismatched source sample rate in WAVE file '%s'.\n", src -> mPath); + return (0); + } + if (format == WAVE_FORMAT_PCM) { + if ((size < 2) || (size > 4)) { + fprintf (stderr, "Error: Unsupported sample size in WAVE file '%s'.\n", src -> mPath); + return (0); + } + if ((bits < 16) || (bits > (8 * size))) { + fprintf (stderr, "Error: Bad significant bits in WAVE file '%s'.\n", src -> mPath); + return (0); + } + src -> mType = ET_INT; + } else { + if ((size != 4) && (size != 8)) { + fprintf (stderr, "Error: Unsupported sample size in WAVE file '%s'.\n", src -> mPath); + return (0); + } + src -> mType = ET_FP; + } + src -> mSize = size; + src -> mBits = (int) bits; + src -> mSkip = channels; return (1); } -// Write a 16-bit little-endian unsigned integer to a file. -static int WriteUInt16Le (ALushort val, const char * fileName, FILE * fp) { - ALubyte vb [2]; +// Read a RIFF/RIFX WAVE data chunk, converting all elements to doubles. +static int ReadWaveData (FILE * fp, const SourceRefT * src, const ByteOrderT order, const size_t n, double * hrir) { + int pre, post, skip; + size_t i; - vb [0] = val & 0x00FF; - vb [1] = (val >> 8) & 0x00FF; - if (fwrite (vb, 1, sizeof (vb), fp) != sizeof (vb)) { - fclose (fp); - fprintf (stderr, "Error writing to file, '%s'.\n", fileName); + pre = (int) (src -> mSize * src -> mChannel); + post = (int) (src -> mSize * (src -> mSkip - src -> mChannel - 1)); + skip = 0; + for (i = 0; i < n; i ++) { + skip += pre; + if (skip > 0) + fseek (fp, skip, SEEK_CUR); + if (! ReadBinAsDouble (fp, src -> mPath, order, src -> mType, src -> mSize, src -> mBits, & hrir [i])) + return (0); + skip = post; + } + if (skip > 0) + fseek (fp, skip, SEEK_CUR); + return (1); +} + +// Read the RIFF/RIFX WAVE list or data chunk, converting all elements to +// doubles. +static int ReadWaveList (FILE * fp, const SourceRefT * src, const ByteOrderT order, const size_t n, double * hrir) { + uint4 fourCC, chunkSize, listSize; + size_t block, skip, count, offset, i; + double lastSample; + + for (;;) { + if ((! ReadBin4 (fp, src -> mPath, BO_LITTLE, 4, & fourCC)) || + (! ReadBin4 (fp, src -> mPath, order, 4, & chunkSize))) + return (0); + if (fourCC == FOURCC_DATA) { + block = src -> mSize * src -> mSkip; + count = chunkSize / block; + if (count < (src -> mOffset + n)) { + fprintf (stderr, "Error: Bad read from file '%s'.\n", src -> mPath); + return (0); + } + fseek (fp, src -> mOffset * block, SEEK_CUR); + if (! ReadWaveData (fp, src, order, n, & hrir [0])) + return (0); + return (1); + } else if (fourCC == FOURCC_LIST) { + if (! ReadBin4 (fp, src -> mPath, BO_LITTLE, 4, & fourCC)) + return (0); + chunkSize -= 4; + if (fourCC == FOURCC_WAVL) + break; + } + if (chunkSize > 0) + fseek (fp, chunkSize, SEEK_CUR); + } + listSize = chunkSize; + block = src -> mSize * src -> mSkip; + skip = src -> mOffset; + offset = 0; + lastSample = 0.0; + while ((offset < n) && (listSize > 8)) { + if ((! ReadBin4 (fp, src -> mPath, BO_LITTLE, 4, & fourCC)) || + (! ReadBin4 (fp, src -> mPath, order, 4, & chunkSize))) + return (0); + listSize -= 8 + chunkSize; + if (fourCC == FOURCC_DATA) { + count = chunkSize / block; + if (count > skip) { + fseek (fp, skip * block, SEEK_CUR); + chunkSize -= skip * block; + count -= skip; + skip = 0; + if (count > (n - offset)) + count = n - offset; + if (! ReadWaveData (fp, src, order, count, & hrir [offset])) + return (0); + chunkSize -= count * block; + offset += count; + lastSample = hrir [offset - 1]; + } else { + skip -= count; + count = 0; + } + } else if (fourCC == FOURCC_SLNT) { + if (! ReadBin4 (fp, src -> mPath, order, 4, & count)) + return (0); + chunkSize -= 4; + if (count > skip) { + count -= skip; + skip = 0; + if (count > (n - offset)) + count = n - offset; + for (i = 0; i < count; i ++) + hrir [offset + i] = lastSample; + offset += count; + } else { + skip -= count; + count = 0; + } + } + if (chunkSize > 0) + fseek (fp, chunkSize, SEEK_CUR); + } + if (offset < n) { + fprintf (stderr, "Error: Bad read from file '%s'.\n", src -> mPath); return (0); } return (1); } -// Write an 8-bit unsigned integer to a file. -static int WriteUInt8 (ALubyte val, const char * fileName, FILE * fp) { - if (fwrite (& val, 1, sizeof (val), fp) != sizeof (val)) { - fclose (fp); - fprintf (stderr, "Error writing to file, '%s'.\n", fileName); +// Load a source HRIR from a RIFF/RIFX WAVE file. +static int LoadWaveSource (FILE * fp, SourceRefT * src, const uint hrirRate, const size_t n, double * hrir) { + uint4 fourCC, dummy; + ByteOrderT order; + + if ((! ReadBin4 (fp, src -> mPath, BO_LITTLE, 4, & fourCC)) || + (! ReadBin4 (fp, src -> mPath, BO_LITTLE, 4, & dummy))) + return (0); + if (fourCC == FOURCC_RIFF) { + order = BO_LITTLE; + } else if (fourCC == FOURCC_RIFX) { + order = BO_BIG; + } else { + fprintf (stderr, "Error: No RIFF/RIFX chunk in file '%s'.\n", src -> mPath); + return (0); + } + if (! ReadBin4 (fp, src -> mPath, BO_LITTLE, 4, & fourCC)) + return (0); + if (fourCC != FOURCC_WAVE) { + fprintf (stderr, "Error: Not a RIFF/RIFX WAVE file '%s'.\n", src -> mPath); return (0); } + if (! ReadWaveFormat (fp, order, hrirRate, src)) + return (0); + if (! ReadWaveList (fp, src, order, n, hrir)) + return (0); return (1); } -// Load the MIT HRIRs. This loads the entire diffuse or compact set starting -// counter-clockwise up at the bottom elevation and clockwise at the forward -// azimuth. -static int LoadMitHrirs (const char * baseName, HrirDataT * hData) { - const int EV_ANGLE [MIT_EV_COUNT] = { - -90, -80, -70, -60, -50, -40, -30, -20, -10, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 - }; - int e, a; - char fileName [1024]; - FILE * fp = NULL; - int j0, j1, i; - float s; - - for (e = MIT_EV_START; e < MIT_EV_COUNT; e ++) { - for (a = 0; a < MIT_AZ_COUNT [e]; a ++) { - // The data packs the first 180 degrees in the left channel, and - // the last 180 degrees in the right channel. - if (round ((360.0f / MIT_AZ_COUNT [e]) * a) > 180.0f) - break; - // Determine which file to open. - snprintf (fileName, 1023, "%s%d/H%de%03da.wav", baseName, EV_ANGLE [e], EV_ANGLE [e], (int) round ((360.0f / MIT_AZ_COUNT [e]) * a)); - if ((fp = fopen (fileName, "rb")) == NULL) { - fprintf (stderr, "Could not open file, '%s'.\n", fileName); +// Load a source HRIR from a binary file. +static int LoadBinarySource (FILE * fp, const SourceRefT * src, const ByteOrderT order, const size_t n, double * hrir) { + size_t i; + + fseek (fp, src -> mOffset, SEEK_SET); + for (i = 0; i < n; i ++) { + if (! ReadBinAsDouble (fp, src -> mPath, order, src -> mType, src -> mSize, src -> mBits, & hrir [i])) + return (0); + if (src -> mSkip > 0) + fseek (fp, src -> mSkip, SEEK_CUR); + } + return (1); +} + +// Load a source HRIR from an ASCII text file containing a list of elements +// separated by whitespace or common list operators (',', ';', ':', '|'). +static int LoadAsciiSource (FILE * fp, const SourceRefT * src, const size_t n, double * hrir) { + TokenReaderT tr; + size_t i, j; + double dummy; + + TrSetup (fp, NULL, & tr); + for (i = 0; i < src -> mOffset; i ++) { + if (! ReadAsciiAsDouble (& tr, src -> mPath, src -> mType, src -> mBits, & dummy)) + return (0); + } + for (i = 0; i < n; i ++) { + if (! ReadAsciiAsDouble (& tr, src -> mPath, src -> mType, src -> mBits, & hrir [i])) + return (0); + for (j = 0; j < src -> mSkip; j ++) { + if (! ReadAsciiAsDouble (& tr, src -> mPath, src -> mType, src -> mBits, & dummy)) return (0); - } - // Assuming they have not changed format, skip the .WAV header. - fseek (fp, 44, SEEK_SET); - // Map the left and right channels to their appropriate azimuth - // offsets. - j0 = (MIT_EV_OFFSET [e] + a) * MIT_IR_SIZE; - j1 = (MIT_EV_OFFSET [e] + ((MIT_AZ_COUNT [e] - a) % MIT_AZ_COUNT [e])) * MIT_IR_SIZE; - // Read in the data, converting it to floating-point. - for (i = 0; i < MIT_IR_SIZE; i ++) { - if (! ReadInt16LeAsFloat32 (fileName, fp, & s)) - return (0); - hData -> mHrirs [j0 + i] = s; - if (! ReadInt16LeAsFloat32 (fileName, fp, & s)) - return (0); - hData -> mHrirs [j1 + i] = s; - } - fclose (fp); } } return (1); } -// Performs the minimum phase reconstruction for a given HRIR data set. The -// cepstrum size should be made configureable at some point in the future. -static void ReconstructHrirs (int minIrSize, HrirDataT * hData) { - int start, end, step, j; - float cep [CEP_SIZE]; +// Load a source HRIR from a supported file type. +static int LoadSource (SourceRefT * src, const uint hrirRate, const size_t n, double * hrir) { + FILE * fp = NULL; + int result; + + if (src -> mFormat == SF_ASCII) + fp = fopen (src -> mPath, "r"); + else + fp = fopen (src -> mPath, "rb"); + if (fp == NULL) { + fprintf (stderr, "Error: Could not open source file '%s'.\n", src -> mPath); + return (0); + } + if (src -> mFormat == SF_WAVE) + result = LoadWaveSource (fp, src, hrirRate, n, hrir); + else if (src -> mFormat == SF_BIN_LE) + result = LoadBinarySource (fp, src, BO_LITTLE, n, hrir); + else if (src -> mFormat == SF_BIN_BE) + result = LoadBinarySource (fp, src, BO_BIG, n, hrir); + else + result = LoadAsciiSource (fp, src, n, hrir); + fclose (fp); + return (result); +} - start = hData -> mEvOffset [hData -> mEvStart]; - end = hData -> mIrCount; - step = hData -> mIrSize; - for (j = start; j < end; j ++) { - RealCepstrum (step, & hData -> mHrirs [j * step], cep); - MinimumPhase (cep, minIrSize, & hData -> mHrirs [j * minIrSize]); +// Calculate the magnitude response of an HRIR and average it with any +// existing responses for its elevation and azimuth. +static void AverageHrirMagnitude (const double * hrir, const double f, const uint ei, const uint ai, const HrirDataT * hData) { + double * re = NULL, * im = NULL; + size_t n, m, i, j; + + n = hData -> mFftSize; + re = CreateArray (n); + im = CreateArray (n); + for (i = 0; i < hData -> mIrPoints; i ++) { + re [i] = hrir [i]; + im [i] = 0.0; } - hData -> mIrSize = minIrSize; + for (; i < n; i ++) { + re [i] = 0.0; + im [i] = 0.0; + } + FftForward (n, re, im, re, im); + MagnitudeResponse (n, re, im, re); + m = 1 + (n / 2); + j = (hData -> mEvOffset [ei] + ai) * hData -> mIrSize; + for (i = 0; i < m; i ++) + hData -> mHrirs [j + i] = Lerp (hData -> mHrirs [j + i], re [i], f); + DestroyArray (im); + DestroyArray (re); } -// Renormalize the entire HRIR data set, and attenutate it slightly. -static void RenormalizeHrirs (const HrirDataT * hData) { - int step, start, end; - float norm; - int j, i; +/* Calculate the contribution of each HRIR to the diffuse-field average based + * on the area of its surface patch. All patches are centered at the HRIR + * coordinates on the unit sphere and are measured by solid angle. + */ +static void CalculateDfWeights (const HrirDataT * hData, double * weights) { + uint ei; + double evs, sum, ev, up_ev, down_ev, solidAngle; + + evs = 90.0 / (hData -> mEvCount - 1); + sum = 0.0; + for (ei = hData -> mEvStart; ei < hData -> mEvCount; ei ++) { + // For each elevation, calculate the upper and lower limits of the + // patch band. + ev = -90.0 + (ei * 2.0 * evs); + if (ei < (hData -> mEvCount - 1)) + up_ev = (ev + evs) * M_PI / 180.0; + else + up_ev = M_PI / 2.0; + if (ei > 0) + down_ev = (ev - evs) * M_PI / 180.0; + else + down_ev = -M_PI / 2.0; + // Calculate the area of the patch band. + solidAngle = 2.0 * M_PI * (sin (up_ev) - sin (down_ev)); + // Each weight is the area of one patch. + weights [ei] = solidAngle / hData -> mAzCount [ei]; + // Sum the total surface area covered by the HRIRs. + sum += solidAngle; + } + // Normalize the weights given the total surface coverage. + for (ei = hData -> mEvStart; ei < hData -> mEvCount; ei ++) + weights [ei] /= sum; +} +/* Calculate the diffuse-field average from the given magnitude responses of + * the HRIR set. Weighting can be applied to compensate for the varying + * surface area covered by each HRIR. The final average can then be limited + * by the specified magnitude range (in positive dB; 0.0 to skip). + */ +static void CalculateDiffuseFieldAverage (const HrirDataT * hData, const int weighted, const double limit, double * dfa) { + double * weights = NULL; + uint ei, ai; + size_t count, step, start, end, m, j, i; + double weight; + + weights = CreateArray (hData -> mEvCount); + if (weighted) { + // Use coverage weighting to calculate the average. + CalculateDfWeights (hData, weights); + } else { + // If coverage weighting is not used, the weights still need to be + // averaged by the number of HRIRs. + count = 0; + for (ei = hData -> mEvStart; ei < hData -> mEvCount; ei ++) + count += hData -> mAzCount [ei]; + for (ei = hData -> mEvStart; ei < hData -> mEvCount; ei ++) + weights [ei] = 1.0 / count; + } + ei = hData -> mEvStart; + ai = 0; step = hData -> mIrSize; - start = hData -> mEvOffset [hData -> mEvStart] * step; + start = hData -> mEvOffset [ei] * step; end = hData -> mIrCount * step; - norm = 0.0f; + m = 1 + (hData -> mFftSize / 2); + for (i = 0; i < m; i ++) + dfa [i] = 0.0; for (j = start; j < end; j += step) { - for (i = 0; i < step; i ++) { - if (fabs (hData -> mHrirs [j + i]) > norm) - norm = fabs (hData -> mHrirs [j + i]); + // Get the weight for this HRIR's contribution. + weight = weights [ei]; + // Add this HRIR's weighted power average to the total. + for (i = 0; i < m; i ++) + dfa [i] += weight * hData -> mHrirs [j + i] * hData -> mHrirs [j + i]; + // Determine the next weight to use. + ai ++; + if (ai >= hData -> mAzCount [ei]) { + ei ++; + ai = 0; } } - if (norm > 0.000001f) - norm = 1.0f / norm; - norm *= 0.95f; + // Finish the average calculation and keep it from being too small. + for (i = 0; i < m; i ++) + dfa [i] = fmax (sqrt (dfa [i]), EPSILON); + // Apply a limit to the magnitude range of the diffuse-field average if + // desired. + if (limit > 0.0) + LimitMagnitudeResponse (hData -> mFftSize, limit, dfa, dfa); + DestroyArray (weights); +} + +// Perform diffuse-field equalization on the magnitude responses of the HRIR +// set using the given average response. +static void DiffuseFieldEqualize (const double * dfa, const HrirDataT * hData) { + size_t step, start, end, m, j, i; + + step = hData -> mIrSize; + start = hData -> mEvOffset [hData -> mEvStart] * step; + end = hData -> mIrCount * step; + m = 1 + (hData -> mFftSize / 2); for (j = start; j < end; j += step) { - for (i = 0; i < step; i ++) - hData -> mHrirs [j + i] *= norm; + for (i = 0; i < m; i ++) + hData -> mHrirs [j + i] /= dfa [i]; } } -// Given an elevation offset and azimuth, calculates two offsets for -// addressing the HRIRs buffer and their interpolation factor. -static void CalcAzIndices (const HrirDataT * hData, int oi, float az, int * j0, int * j1, float * jf) { - int ai; +// Perform minimum-phase reconstruction using the magnitude responses of the +// HRIR set. +static void ReconstructHrirs (const HrirDataT * hData) { + double * re = NULL, * im = NULL; + size_t step, start, end, n, j, i; - az = fmod ((2.0f * M_PI) + az, 2.0f * M_PI) * hData -> mAzCount [oi] / (2.0f * M_PI); - ai = (int) az; - az -= ai; - (* j0) = hData -> mEvOffset [oi] + ai; - (* j1) = hData -> mEvOffset [oi] + ((ai + 1) % hData -> mAzCount [oi]); - (* jf) = az; + step = hData -> mIrSize; + start = hData -> mEvOffset [hData -> mEvStart] * step; + end = hData -> mIrCount * step; + n = hData -> mFftSize; + re = CreateArray (n); + im = CreateArray (n); + for (j = start; j < end; j += step) { + MinimumPhase (n, & hData -> mHrirs [j], re, im); + FftInverse (n, re, im, re, im); + for (i = 0; i < hData -> mIrPoints; i ++) + hData -> mHrirs [j + i] = re [i]; + } + DestroyArray (im); + DestroyArray (re); } -// Perform a linear interpolation. -static float Lerp (float a, float b, float f) { - return (a + (f * (b - a))); +/* Given an elevation index and an azimuth, calculate the indices of the two + * HRIRs that bound the coordinate along with a factor for calculating the + * continous HRIR using interpolation. + */ +static void CalcAzIndices (const HrirDataT * hData, const uint ei, const double az, uint * j0, uint * j1, double * jf) { + double af; + uint ai; + + af = ((2.0 * M_PI) + az) * hData -> mAzCount [ei] / (2.0 * M_PI); + ai = ((uint) af) % hData -> mAzCount [ei]; + af -= floor (af); + (* j0) = hData -> mEvOffset [ei] + ai; + (* j1) = hData -> mEvOffset [ei] + ((ai + 1) % hData -> mAzCount [ei]); + (* jf) = af; } -// Attempt to synthesize any missing HRIRs at the bottom elevations. Right -// now this just blends the lowest elevation HRIRs together and applies some -// attenuates and high frequency damping. It's not a realistic model to use, -// but it is simple. +/* Attempt to synthesize any missing HRIRs at the bottom elevations. Right + * now this just blends the lowest elevation HRIRs together and applies some + * attenuation and high frequency damping. It is a simple, if inaccurate + * model. + */ static void SynthesizeHrirs (HrirDataT * hData) { - int step, oi, i, a, j, e; - float of; - int j0, j1; - float jf; - float lp [4], s0, s1; + uint oi, a, e; + size_t step, n, i, j; + double of; + size_t j0, j1; + double jf; + double lp [4], s0, s1; if (hData -> mEvStart <= 0) return; step = hData -> mIrSize; oi = hData -> mEvStart; - for (i = 0; i < step; i ++) - hData -> mHrirs [i] = 0.0f; + n = hData -> mIrPoints; + for (i = 0; i < n; i ++) + hData -> mHrirs [i] = 0.0; for (a = 0; a < hData -> mAzCount [oi]; a ++) { j = (hData -> mEvOffset [oi] + a) * step; - for (i = 0; i < step; i ++) + for (i = 0; i < n; i ++) hData -> mHrirs [i] += hData -> mHrirs [j + i] / hData -> mAzCount [oi]; } for (e = 1; e < hData -> mEvStart; e ++) { - of = ((float) e) / hData -> mEvStart; + of = ((double) e) / hData -> mEvStart; for (a = 0; a < hData -> mAzCount [e]; a ++) { j = (hData -> mEvOffset [e] + a) * step; - CalcAzIndices (hData, oi, a * 2.0f * M_PI / hData -> mAzCount [e], & j0, & j1, & jf); + CalcAzIndices (hData, oi, a * 2.0 * M_PI / hData -> mAzCount [e], & j0, & j1, & jf); j0 *= step; j1 *= step; - lp [0] = 0.0f; - lp [1] = 0.0f; - lp [2] = 0.0f; - lp [3] = 0.0f; - for (i = 0; i < step; i ++) { + lp [0] = 0.0; + lp [1] = 0.0; + lp [2] = 0.0; + lp [3] = 0.0; + for (i = 0; i < n; i ++) { s0 = hData -> mHrirs [i]; s1 = Lerp (hData -> mHrirs [j0 + i], hData -> mHrirs [j1 + i], jf); s0 = Lerp (s0, s1, of); - lp [0] = Lerp (s0, lp [0], 0.15f - (0.15f * of)); - lp [1] = Lerp (lp [0], lp [1], 0.15f - (0.15f * of)); - lp [2] = Lerp (lp [1], lp [2], 0.15f - (0.15f * of)); - lp [3] = Lerp (lp [2], lp [3], 0.15f - (0.15f * of)); + lp [0] = Lerp (s0, lp [0], 0.15 - (0.15 * of)); + lp [1] = Lerp (lp [0], lp [1], 0.15 - (0.15 * of)); + lp [2] = Lerp (lp [1], lp [2], 0.15 - (0.15 * of)); + lp [3] = Lerp (lp [2], lp [3], 0.15 - (0.15 * of)); hData -> mHrirs [j + i] = lp [3]; } } } - lp [0] = 0.0f; - lp [1] = 0.0f; - lp [2] = 0.0f; - lp [3] = 0.0f; - for (i = 0; i < step; i ++) { + lp [0] = 0.0; + lp [1] = 0.0; + lp [2] = 0.0; + lp [3] = 0.0; + for (i = 0; i < n; i ++) { s0 = hData -> mHrirs [i]; - lp [0] = Lerp (s0, lp [0], 0.15f); - lp [1] = Lerp (lp [0], lp [1], 0.15f); - lp [2] = Lerp (lp [1], lp [2], 0.15f); - lp [3] = Lerp (lp [2], lp [3], 0.15f); + lp [0] = Lerp (s0, lp [0], 0.15); + lp [1] = Lerp (lp [0], lp [1], 0.15); + lp [2] = Lerp (lp [1], lp [2], 0.15); + lp [3] = Lerp (lp [2], lp [3], 0.15); hData -> mHrirs [i] = lp [3]; } hData -> mEvStart = 0; } +// The following routines assume a full set of HRIRs for all elevations. + +// Normalize the HRIR set and slightly attenuate the result. +static void NormalizeHrirs (const HrirDataT * hData) { + size_t step, end, n, j, i; + double maxLevel; + + step = hData -> mIrSize; + end = hData -> mIrCount * step; + n = hData -> mIrPoints; + maxLevel = 0.0; + for (j = 0; j < end; j += step) { + for (i = 0; i < n; i ++) + maxLevel = fmax (fabs (hData -> mHrirs [j + i]), maxLevel); + } + maxLevel = 1.01 * maxLevel; + for (j = 0; j < end; j += step) { + for (i = 0; i < n; i ++) + hData -> mHrirs [j + i] /= maxLevel; + } +} + +// Calculate the left-ear time delay using a spherical head model. +static double CalcLTD (const double ev, const double az, const double rad, const double dist) { + double azp, dlp, l, al; + + azp = asin (cos (ev) * sin (az)); + dlp = sqrt ((dist * dist) + (rad * rad) + (2.0 * dist * rad * sin (azp))); + l = sqrt ((dist * dist) - (rad * rad)); + al = (0.5 * M_PI) + azp; + if (dlp > l) + dlp = l + (rad * (al - acos (rad / dist))); + return (dlp / 343.3); +} + // Calculate the effective head-related time delays for the each HRIR, now // that they are minimum-phase. static void CalculateHrtds (HrirDataT * hData) { - float minHrtd, maxHrtd; - int e, a, j; - float t; + double minHrtd, maxHrtd; + uint e, a, j; + double t; - minHrtd = 1000.0f; - maxHrtd = -1000.0f; + minHrtd = 1000.0; + maxHrtd = -1000.0; for (e = 0; e < hData -> mEvCount; e ++) { for (a = 0; a < hData -> mAzCount [e]; a ++) { j = hData -> mEvOffset [e] + a; - t = CalcLTD ((-90.0f + (e * 180.0f / (hData -> mEvCount - 1))) * M_PI / 180.0f, - (a * 360.0f / hData -> mAzCount [e]) * M_PI / 180.0f, + t = CalcLTD ((-90.0 + (e * 180.0 / (hData -> mEvCount - 1))) * M_PI / 180.0, + (a * 360.0 / hData -> mAzCount [e]) * M_PI / 180.0, hData -> mRadius, hData -> mDistance); hData -> mHrtds [j] = t; - if (t > maxHrtd) - maxHrtd = t; - if (t < minHrtd) - minHrtd = t; + maxHrtd = fmax (t, maxHrtd); + minHrtd = fmin (t, minHrtd); } } maxHrtd -= minHrtd; @@ -574,180 +1737,668 @@ static void CalculateHrtds (HrirDataT * hData) { hData -> mMaxHrtd = maxHrtd; } -// Save the OpenAL Soft HRTF data set. -static int SaveMhr (const HrirDataT * hData, const char * fileName) { +// Store the OpenAL Soft HRTF data set. +static int StoreMhr (const HrirDataT * hData, const char * filename) { FILE * fp = NULL; - int e, step, end, j, i; + uint e; + size_t step, end, n, j, i; + int hpHist, v; - if ((fp = fopen (fileName, "wb")) == NULL) { - fprintf (stderr, "Could not create file, '%s'.\n", fileName); + if ((fp = fopen (filename, "wb")) == NULL) { + fprintf (stderr, "Error: Could not open MHR file '%s'.\n", filename); return (0); } - if (! WriteString (MHR_FORMAT, fileName, fp)) - return (0); - if (! WriteUInt32Le ((ALuint) hData -> mIrRate, fileName, fp)) + if (! WriteAscii (MHR_FORMAT, fp, filename)) return (0); - if (! WriteUInt16Le ((ALushort) hData -> mIrCount, fileName, fp)) + if (! WriteBin4 (BO_LITTLE, 4, (uint4) hData -> mIrRate, fp, filename)) return (0); - if (! WriteUInt16Le ((ALushort) hData -> mIrSize, fileName, fp)) + if (! WriteBin4 (BO_LITTLE, 1, (uint4) hData -> mIrPoints, fp, filename)) return (0); - if (! WriteUInt8 ((ALubyte) hData -> mEvCount, fileName, fp)) + if (! WriteBin4 (BO_LITTLE, 1, (uint4) hData -> mEvCount, fp, filename)) return (0); for (e = 0; e < hData -> mEvCount; e ++) { - if (! WriteUInt16Le ((ALushort) hData -> mEvOffset [e], fileName, fp)) + if (! WriteBin4 (BO_LITTLE, 1, (uint4) hData -> mAzCount [e], fp, filename)) return (0); } step = hData -> mIrSize; end = hData -> mIrCount * step; + n = hData -> mIrPoints; + srand (0x31DF840C); for (j = 0; j < end; j += step) { - for (i = 0; i < step; i ++) { - if (! WriteFloat32AsInt16Le (hData -> mHrirs [j + i], fileName, fp)) + hpHist = 0; + for (i = 0; i < n; i ++) { + v = HpTpdfDither (32767.0 * hData -> mHrirs [j + i], & hpHist); + if (! WriteBin4 (BO_LITTLE, 2, (uint4) v, fp, filename)) return (0); } } for (j = 0; j < hData -> mIrCount; j ++) { - i = (int) round (44100.0f * hData -> mHrtds [j]); - if (i > 127) - i = 127; - if (! WriteUInt8 ((ALubyte) i, fileName, fp)) +// v = (int) fmin (round (44100.0 * hData -> mHrtds [j]), MAX_HRTD); +v = fmin (hData -> mHrtds [j], MAX_HRTD); + if (! WriteBin4 (BO_LITTLE, 1, (uint4) v, fp, filename)) return (0); } fclose (fp); return (1); } -// Save the OpenAL Soft built-in table. -static int SaveTab (const HrirDataT * hData, const char * fileName) { +// Store the OpenAL Soft built-in table. +static int StoreTable (const HrirDataT * hData, const char * filename) { FILE * fp = NULL; - int step, end, j, i; - char text [16]; + size_t step, end, n, j, i; + int hpHist, v; + char text [128 + 1]; - if ((fp = fopen (fileName, "wb")) == NULL) { - fprintf (stderr, "Could not create file, '%s'.\n", fileName); + if ((fp = fopen (filename, "wb")) == NULL) { + fprintf (stderr, "Error: Could not open table file '%s'.\n", filename); return (0); } - if (! WriteString ("/* This data is Copyright 1994 by the MIT Media Laboratory. It is provided free\n" - " * with no restrictions on use, provided the authors are cited when the data is\n" - " * used in any research or commercial application. */\n" - "/* Bill Gardner <[email protected]> and Keith Martin <[email protected]> */\n" - "\n" - " /* HRIR Coefficients */\n" - " {\n", fileName, fp)) + snprintf (text, 128, "/* Elevation metrics */\n" + "static const ALubyte defaultAzCount[%u] = { ", hData -> mEvCount); + if (! WriteAscii (text, fp, filename)) return (0); + for (i = 0; i < hData -> mEvCount; i ++) { + snprintf (text, 128, "%u, ", hData -> mAzCount [i]); + if (! WriteAscii (text, fp, filename)) + return (0); + } + snprintf (text, 128, "};\n" + "static const ALushort defaultEvOffset[%u] = { ", hData -> mEvCount); + if (! WriteAscii (text, fp, filename)) + return (0); + for (i = 0; i < hData -> mEvCount; i ++) { + snprintf (text, 128, "%u, ", hData -> mEvOffset [i]); + if (! WriteAscii (text, fp, filename)) + return (0); + } step = hData -> mIrSize; end = hData -> mIrCount * step; + n = hData -> mIrPoints; + snprintf (text, 128, "};\n\n" + "/* HRIR Coefficients */\n" + "static const ALshort defaultCoeffs[%u] =\n{\n", end); + if (! WriteAscii (text, fp, filename)) + return (0); + srand (0x31DF840C); for (j = 0; j < end; j += step) { - if (! WriteString (" { ", fileName, fp)) + if (! WriteAscii (" ", fp, filename)) return (0); - for (i = 0; i < step; i ++) { - snprintf (text, 15, "%+d, ", (int) round (32767.0f * hData -> mHrirs [j + i])); - if (! WriteString (text, fileName, fp)) + hpHist = 0; + for (i = 0; i < n; i ++) { + v = HpTpdfDither (32767.0 * hData -> mHrirs [j + i], & hpHist); + snprintf (text, 128, "%+d, ", v); + if (! WriteAscii (text, fp, filename)) return (0); } - if (! WriteString ("},\n", fileName, fp)) + if (! WriteAscii ("\n", fp, filename)) return (0); } - if (! WriteString (" },\n" - "\n" - " /* HRIR Delays */\n" - " { ", fileName, fp)) + snprintf (text, 128, "};\n\n" + "/* HRIR Delays */\n" + "static const ALubyte defaultDelays[%d] =\n{\n" + " ", hData -> mIrCount); + if (! WriteAscii (text, fp, filename)) return (0); for (j = 0; j < hData -> mIrCount; j ++) { - snprintf (text, 15, "%d, ", (int) round (44100.0f * hData -> mHrtds [j])); - if (! WriteString (text, fileName, fp)) + v = (int) fmin (round (44100.0 * hData -> mHrtds [j]), MAX_HRTD); + snprintf (text, 128, "%d, ", v); + if (! WriteAscii (text, fp, filename)) return (0); } - if (! WriteString ("}\n", fileName, fp)) + if (! WriteAscii ("\n};\n\n" + "/* Default HRTF Definition */\n", fp, filename)) + return (0); + snprintf (text, 128, "static const struct Hrtf DefaultHrtf = {\n" + " %u, %u, %u, defaultAzCount, defaultEvOffset,\n", + hData -> mIrRate, hData -> mIrPoints, hData -> mEvCount); + if (! WriteAscii (text, fp, filename)) + return (0); + if (! WriteAscii (" defaultCoeffs, defaultDelays, NULL\n" + "};\n", fp, filename)) return (0); fclose (fp); return (1); } -// Loads and processes an MIT data set. At present, the HRIR and HRTD data -// is loaded and processed in a static buffer. That should change to using -// heap allocated memory in the future. A cleanup function will then be -// required. -static int MakeMit(const char *baseInName, HrirDataT *hData) -{ - static float hrirs[MIT_IR_COUNT * MIT_IR_SIZE]; - static float hrtds[MIT_IR_COUNT]; - - hData->mIrRate = MIT_IR_RATE; - hData->mIrCount = MIT_IR_COUNT; - hData->mIrSize = MIT_IR_SIZE; - hData->mEvCount = MIT_EV_COUNT; - hData->mEvStart = MIT_EV_START; - hData->mEvOffset = MIT_EV_OFFSET; - hData->mAzCount = MIT_AZ_COUNT; - hData->mRadius = MIT_RADIUS; - hData->mDistance = MIT_DISTANCE; - hData->mHrirs = hrirs; - hData->mHrtds = hrtds; - fprintf(stderr, "Loading base HRIR data...\n"); - if(!LoadMitHrirs(baseInName, hData)) - return 0; - fprintf(stderr, "Performing minimum phase reconstruction and truncation...\n"); - ReconstructHrirs(MIN_IR_SIZE, hData); - fprintf(stderr, "Renormalizing minimum phase HRIR data...\n"); - RenormalizeHrirs(hData); - fprintf(stderr, "Synthesizing missing elevations...\n"); - SynthesizeHrirs(hData); - fprintf(stderr, "Calculating impulse delays...\n"); - CalculateHrtds(hData); - return 1; -} - -// Simple dispatch. Provided a command, the path to the MIT set of choice, -// and an optional output filename, this will produce an OpenAL Soft -// compatible HRTF set in the chosen format. -int main(int argc, char *argv[]) -{ - char baseName[1024]; - const char *outName = NULL; - HrirDataT hData; - - if(argc < 3 || strcmp(argv [1], "-h") == 0 || strcmp (argv [1], "--help") == 0) - { - fprintf(stderr, "Usage: %s <command> <path of MIT set> [ <output file> ]\n\n", argv[0]); - fprintf(stderr, "Commands:\n"); - fprintf(stderr, " -m, --make-mhr Makes an OpenAL Soft compatible HRTF data set.\n"); - fprintf(stderr, " Defaults output to: ./oal_soft_hrtf_44100.mhr\n"); - fprintf(stderr, " -t, --make-tab Makes the built-in table used when compiling OpenAL Soft.\n"); - fprintf(stderr, " Defaults output to: ./hrtf_tables.inc\n"); - fprintf(stderr, " -h, --help Displays this help information.\n"); - return 0; +// Process the data set definition to read and validate the data set metrics. +static int ProcessMetrics (TokenReaderT * tr, const size_t fftSize, const size_t truncSize, HrirDataT * hData) { + char ident [MAX_IDENT_LEN + 1]; + uint line, col; + int intVal; + size_t points; + double fpVal; + int hasRate = 0, hasPoints = 0, hasAzimuths = 0; + int hasRadius = 0, hasDistance = 0; + + while (! (hasRate && hasPoints && hasAzimuths && hasRadius && hasDistance)) { + TrIndication (tr, & line, & col); + if (! TrReadIdent (tr, MAX_IDENT_LEN, ident)) + return (0); + if (strcasecmp (ident, "rate") == 0) { + if (hasRate) { + TrErrorAt (tr, line, col, "Redefinition of 'rate'.\n"); + return (0); + } + if (! TrReadOperator (tr, "=")) + return (0); + if (! TrReadInt (tr, MIN_RATE, MAX_RATE, & intVal)) + return (0); + hData -> mIrRate = intVal; + hasRate = 1; + } else if (strcasecmp (ident, "points") == 0) { + if (hasPoints) { + TrErrorAt (tr, line, col, "Redefinition of 'points'.\n"); + return (0); + } + if (! TrReadOperator (tr, "=")) + return (0); + TrIndication (tr, & line, & col); + if (! TrReadInt (tr, MIN_POINTS, MAX_POINTS, & intVal)) + return (0); + points = (size_t) intVal; + if ((fftSize > 0) && (points > fftSize)) { + TrErrorAt (tr, line, col, "Value exceeds the overriden FFT size.\n"); + return (0); + } + if (points < truncSize) { + TrErrorAt (tr, line, col, "Value is below the truncation size.\n"); + return (0); + } + hData -> mIrPoints = points; + hData -> mFftSize = fftSize; + if (fftSize <= 0) { + points = 1; + while (points < (4 * hData -> mIrPoints)) + points <<= 1; + hData -> mFftSize = points; + hData -> mIrSize = 1 + (points / 2); + } else { + hData -> mFftSize = fftSize; + hData -> mIrSize = 1 + (fftSize / 2); + if (points > hData -> mIrSize) + hData -> mIrSize = points; + } + hasPoints = 1; + } else if (strcasecmp (ident, "azimuths") == 0) { + if (hasAzimuths) { + TrErrorAt (tr, line, col, "Redefinition of 'azimuths'.\n"); + return (0); + } + if (! TrReadOperator (tr, "=")) + return (0); + hData -> mIrCount = 0; + hData -> mEvCount = 0; + hData -> mEvOffset [0] = 0; + for (;;) { + if (! TrReadInt (tr, MIN_AZ_COUNT, MAX_AZ_COUNT, & intVal)) + return (0); + hData -> mAzCount [hData -> mEvCount] = intVal; + hData -> mIrCount += intVal; + hData -> mEvCount ++; + if (! TrIsOperator (tr, ",")) + break; + if (hData -> mEvCount >= MAX_EV_COUNT) { + TrError (tr, "Exceeded the maximum of %d elevations.\n", MAX_EV_COUNT); + return (0); + } + hData -> mEvOffset [hData -> mEvCount] = hData -> mEvOffset [hData -> mEvCount - 1] + intVal; + TrReadOperator (tr, ","); + } + if (hData -> mEvCount < MIN_EV_COUNT) { + TrErrorAt (tr, line, col, "Did not reach the minimum of %d azimuth counts.\n", MIN_EV_COUNT); + return (0); + } + hasAzimuths = 1; + } else if (strcasecmp (ident, "radius") == 0) { + if (hasRadius) { + TrErrorAt (tr, line, col, "Redefinition of 'radius'.\n"); + return (0); + } + if (! TrReadOperator (tr, "=")) + return (0); + if (! TrReadFloat (tr, MIN_RADIUS, MAX_RADIUS, & fpVal)) + return (0); + hData -> mRadius = fpVal; + hasRadius = 1; + } else if (strcasecmp (ident, "distance") == 0) { + if (hasDistance) { + TrErrorAt (tr, line, col, "Redefinition of 'distance'.\n"); + return (0); + } + if (! TrReadOperator (tr, "=")) + return (0); + if (! TrReadFloat (tr, MIN_DISTANCE, MAX_DISTANCE, & fpVal)) + return (0); + hData -> mDistance = fpVal; + hasDistance = 1; + } else { + TrErrorAt (tr, line, col, "Expected a metric name.\n"); + return (0); } + TrSkipWhitespace (tr); + } + return (1); +} - snprintf(baseName, sizeof(baseName), "%s/elev", argv[2]); - if(strcmp(argv[1], "-m") == 0 || strcmp(argv[1], "--make-mhr") == 0) - { - if(argc > 3) - outName = argv[3]; - else - outName = "./oal_soft_hrtf_44100.mhr"; - if(!MakeMit(baseName, &hData)) - return -1; - fprintf(stderr, "Creating data set file...\n"); - if(!SaveMhr(&hData, outName)) - return -1; - } - else if(strcmp(argv[1], "-t") == 0 || strcmp(argv[1], "--make-tab") == 0) - { - if(argc > 3) - outName = argv[3]; - else - outName = "./hrtf_tables.inc"; - if(!MakeMit(baseName, &hData)) - return -1; - fprintf(stderr, "Creating table file...\n"); - if(!SaveTab(&hData, outName)) - return -1; +// Parse an index pair from the data set definition. +static int ReadIndexPair (TokenReaderT * tr, const HrirDataT * hData, uint * ei, uint * ai) { + int intVal; + + if (! TrReadInt (tr, 0, hData -> mEvCount, & intVal)) + return (0); + (* ei) = (uint) intVal; + if (! TrReadOperator (tr, ",")) + return (0); + if (! TrReadInt (tr, 0, hData -> mAzCount [(* ei)], & intVal)) + return (0); + (* ai) = (uint) intVal; + return (1); +} + +// Match the source format from a given identifier. +static SourceFormatT MatchSourceFormat (const char * ident) { + if (strcasecmp (ident, "wave") == 0) + return (SF_WAVE); + else if (strcasecmp (ident, "bin_le") == 0) + return (SF_BIN_LE); + else if (strcasecmp (ident, "bin_be") == 0) + return (SF_BIN_BE); + else if (strcasecmp (ident, "ascii") == 0) + return (SF_ASCII); + return (SF_NONE); +} + +// Match the source element type from a given identifier. +static ElementTypeT MatchElementType (const char * ident) { + if (strcasecmp (ident, "int") == 0) + return (ET_INT); + else if (strcasecmp (ident, "fp") == 0) + return (ET_FP); + return (ET_NONE); +} + +// Parse and validate a source reference from the data set definition. +static int ReadSourceRef (TokenReaderT * tr, SourceRefT * src) { + uint line, col; + char ident [MAX_IDENT_LEN + 1]; + int intVal; + + TrIndication (tr, & line, & col); + if (! TrReadIdent (tr, MAX_IDENT_LEN, ident)) + return (0); + src -> mFormat = MatchSourceFormat (ident); + if (src -> mFormat == SF_NONE) { + TrErrorAt (tr, line, col, "Expected a source format.\n"); + return (0); + } + if (! TrReadOperator (tr, "(")) + return (0); + if (src -> mFormat == SF_WAVE) { + if (! TrReadInt (tr, 0, MAX_WAVE_CHANNELS, & intVal)) + return (0); + src -> mType = ET_NONE; + src -> mSize = 0; + src -> mBits = 0; + src -> mChannel = (uint) intVal; + src -> mSkip = 0; + } else { + TrIndication (tr, & line, & col); + if (! TrReadIdent (tr, MAX_IDENT_LEN, ident)) + return (0); + src -> mType = MatchElementType (ident); + if (src -> mType == ET_NONE) { + TrErrorAt (tr, line, col, "Expected a source element type.\n"); + return (0); + } + if ((src -> mFormat == SF_BIN_LE) || (src -> mFormat == SF_BIN_BE)) { + if (! TrReadOperator (tr, ",")) + return (0); + if (src -> mType == ET_INT) { + if (! TrReadInt (tr, MIN_BIN_SIZE, MAX_BIN_SIZE, & intVal)) + return (0); + src -> mSize = intVal; + if (TrIsOperator (tr, ",")) { + TrReadOperator (tr, ","); + TrIndication (tr, & line, & col); + if (! TrReadInt (tr, 0x80000000, 0x7FFFFFFF, & intVal)) + return (0); + if ((abs (intVal) < MIN_BIN_BITS) || (abs (intVal) > (8 * src -> mSize))) { + TrErrorAt (tr, line, col, "Expected a value of (+/-) %d to %d.\n", MIN_BIN_BITS, 8 * src -> mSize); + return (0); + } + src -> mBits = intVal; + } else { + src -> mBits = 8 * src -> mSize; + } + } else { + TrIndication (tr, & line, & col); + if (! TrReadInt (tr, 0x80000000, 0x7FFFFFFF, & intVal)) + return (0); + if ((intVal != 4) && (intVal != 8)) { + TrErrorAt (tr, line, col, "Expected a value of 4 or 8.\n"); + return (0); + } + src -> mSize = (uint) intVal; + src -> mBits = 0; + } + } else if ((src -> mFormat == SF_ASCII) && (src -> mType == ET_INT)) { + if (! TrReadOperator (tr, ",")) + return (0); + if (! TrReadInt (tr, MIN_ASCII_BITS, MAX_ASCII_BITS, & intVal)) + return (0); + src -> mSize = 0; + src -> mBits = intVal; + } else { + src -> mSize = 0; + src -> mBits = 0; + } + if (TrIsOperator (tr, ";")) { + TrReadOperator (tr, ";"); + if (! TrReadInt (tr, 0, 0x7FFFFFFF, & intVal)) + return (0); + src -> mSkip = (uint) intVal; + } else { + src -> mSkip = 0; + } + } + if (! TrReadOperator (tr, ")")) + return (0); + if (TrIsOperator (tr, "@")) { + TrReadOperator (tr, "@"); + if (! TrReadInt (tr, 0, 0x7FFFFFFF, & intVal)) + return (0); + src -> mOffset = (uint) intVal; + } else { + src -> mOffset = 0; + } + if (! TrReadOperator (tr, ":")) + return (0); + if (! TrReadString (tr, MAX_PATH_LEN, src -> mPath)) + return (0); + return (1); +} + +// Process the list of sources in the data set definition. +static int ProcessSources (TokenReaderT * tr, HrirDataT * hData) { + uint * setCount = NULL, * setFlag = NULL; + double * hrir = NULL; + uint line, col, ei, ai; + SourceRefT src; + double factor; + + setCount = (uint *) calloc (hData -> mEvCount, sizeof (uint)); + setFlag = (uint *) calloc (hData -> mIrCount, sizeof (uint)); + hrir = CreateArray (hData -> mIrPoints); + while (TrIsOperator (tr, "[")) { + TrIndication (tr, & line, & col); + TrReadOperator (tr, "["); + if (ReadIndexPair (tr, hData, & ei, & ai)) { + if (TrReadOperator (tr, "]")) { + if (! setFlag [hData -> mEvOffset [ei] + ai]) { + if (TrReadOperator (tr, "=")) { + factor = 1.0; + for (;;) { + if (ReadSourceRef (tr, & src)) { + if (LoadSource (& src, hData -> mIrRate, hData -> mIrPoints, hrir)) { + AverageHrirMagnitude (hrir, 1.0 / factor, ei, ai, hData); + factor += 1.0; + if (! TrIsOperator (tr, "+")) + break; + TrReadOperator (tr, "+"); + continue; + } + } + DestroyArray (hrir); + free (setFlag); + free (setCount); + return (0); + } + setFlag [hData -> mEvOffset [ei] + ai] = 1; + setCount [ei] ++; + continue; + } + } else { + TrErrorAt (tr, line, col, "Redefinition of source.\n"); + } + } } - else - { - fprintf(stderr, "Invalid command '%s'\n", argv[1]); - return -1; + DestroyArray (hrir); + free (setFlag); + free (setCount); + return (0); + } + ei = 0; + while ((ei < hData -> mEvCount) && (setCount [ei] < 1)) + ei ++; + if (ei < hData -> mEvCount) { + hData -> mEvStart = ei; + while ((ei < hData -> mEvCount) && (setCount [ei] == hData -> mAzCount [ei])) + ei ++; + if (ei >= hData -> mEvCount) { + if (! TrLoad (tr)) { + DestroyArray (hrir); + free (setFlag); + free (setCount); + return (1); + } else { + TrError (tr, "Errant data at end of source list.\n"); + } + } else { + TrError (tr, "Missing sources for elevation index %d.\n", ei); + } + } else { + TrError (tr, "Missing source references.\n"); + } + DestroyArray (hrir); + free (setFlag); + free (setCount); + return (0); +} + +/* Parse the data set definition and process the source data, storing the + * resulting data set as desired. If the input name is NULL it will read + * from standard input. + */ +static int ProcessDefinition (const char * inName, const size_t fftSize, const int equalize, const int surface, const double limit, const size_t truncSize, const OutputFormatT outFormat, const char * outName) { + FILE * fp = NULL; + TokenReaderT tr; + HrirDataT hData; + double * dfa = NULL; + char rateStr [8 + 1], expName [MAX_PATH_LEN]; + + hData.mIrRate = 0; + hData.mIrPoints = 0; + hData.mFftSize = 0; + hData.mIrSize = 0; + hData.mIrCount = 0; + hData.mEvCount = 0; + hData.mRadius = 0; + hData.mDistance = 0; + + fprintf (stdout, "Reading HRIR definition...\n"); + if (inName != NULL) { + fp = fopen (inName, "r"); + if (fp == NULL) { + fprintf (stderr, "Error: Could not open definition file '%s'\n", inName); + return (0); + } + TrSetup (fp, inName, & tr); + } else { + fp = stdin; + TrSetup (fp, "<stdin>", & tr); + } + if (! ProcessMetrics (& tr, fftSize, truncSize, & hData)) { + if (inName != NULL) + fclose (fp); + return (0); + } + hData . mHrirs = CreateArray (hData . mIrCount * hData . mIrSize); + hData . mHrtds = CreateArray (hData . mIrCount); + if (! ProcessSources (& tr, & hData)) { + DestroyArray (hData . mHrtds); + DestroyArray (hData . mHrirs); + if (inName != NULL) + fclose (fp); + return (0); + } + if (inName != NULL) + fclose (fp); + if (equalize) { + dfa = CreateArray (1 + (hData . mFftSize / 2)); + fprintf (stdout, "Calculating diffuse-field average...\n"); + CalculateDiffuseFieldAverage (& hData, surface, limit, dfa); + fprintf (stdout, "Performing diffuse-field equalization...\n"); + DiffuseFieldEqualize (dfa, & hData); + DestroyArray (dfa); + } + fprintf (stdout, "Performing minimum phase reconstruction...\n"); + ReconstructHrirs (& hData); + fprintf (stdout, "Truncating minimum-phase HRIRs...\n"); + hData . mIrPoints = truncSize; + fprintf (stdout, "Synthesizing missing elevations...\n"); + SynthesizeHrirs (& hData); + fprintf (stdout, "Normalizing final HRIRs...\n"); + NormalizeHrirs (& hData); + fprintf (stdout, "Calculating impulse delays...\n"); + CalculateHrtds (& hData); + snprintf (rateStr, 8, "%u", hData . mIrRate); + StrSubst (outName, "%r", rateStr, MAX_PATH_LEN, expName); + switch (outFormat) { + case OF_MHR : + fprintf (stdout, "Creating MHR data set file...\n"); + if (! StoreMhr (& hData, expName)) + return (0); + break; + case OF_TABLE : + fprintf (stderr, "Creating OpenAL Soft table file...\n"); + if (! StoreTable (& hData, expName)) + return (0); + break; + default : + break; + } + DestroyArray (hData . mHrtds); + DestroyArray (hData . mHrirs); + return (1); +} + +// Standard command line dispatch. +int main (const int argc, const char * argv []) { + const char * inName = NULL, * outName = NULL; + OutputFormatT outFormat; + int argi; + size_t fftSize; + int equalize, surface; + double limit; + size_t truncSize; + char * end = NULL; + + if (argc < 2) { + fprintf (stderr, "Error: No command specified. See '%s -h' for help.\n", argv [0]); + return (-1); + } + if ((strcmp (argv [1], "--help") == 0) || (strcmp (argv [1], "-h") == 0)) { + fprintf (stdout, "HRTF Processing and Composition Utility\n\n"); + fprintf (stdout, "Usage: %s <command> [<option>...]\n\n", argv [0]); + fprintf (stdout, "Commands:\n"); + fprintf (stdout, " -m, --make-mhr Makes an OpenAL Soft compatible HRTF data set.\n"); + fprintf (stdout, " Defaults output to: ./oalsoft_hrtf_%%r.mhr\n"); + fprintf (stdout, " -t, --make-tab Makes the built-in table used when compiling OpenAL Soft.\n"); + fprintf (stdout, " Defaults output to: ./hrtf_tables.inc\n"); + fprintf (stdout, " -h, --help Displays this help information.\n\n"); + fprintf (stdout, "Options:\n"); + fprintf (stdout, " -f=<points> Override the FFT window size (defaults to the first power-\n"); + fprintf (stdout, " of-two that fits four times the number of HRIR points).\n"); + fprintf (stdout, " -e={on|off} Toggle diffuse-field equalization (default: %s).\n", (DEFAULT_EQUALIZE ? "on" : "off")); + fprintf (stdout, " -s={on|off} Toggle surface-weighted diffuse-field average (default: %s).\n", (DEFAULT_SURFACE ? "on" : "off")); + fprintf (stdout, " -l={<dB>|none} Specify a limit to the magnitude range of the diffuse-field\n"); + fprintf (stdout, " average (default: %.2f).\n", DEFAULT_LIMIT); + fprintf (stdout, " -w=<points> Specify the size of the truncation window that's applied\n"); + fprintf (stdout, " after minimum-phase reconstruction (default: %d).\n", DEFAULT_TRUNCSIZE); + fprintf (stdout, " -i=<filename> Specify an HRIR definition file to use (defaults to stdin).\n"); + fprintf (stdout, " -o=<filename> Specify an output file. Overrides command-selected default.\n"); + fprintf (stdout, " Use of '%%r' will be substituted with the data set sample rate.\n"); + return (0); + } + if ((strcmp (argv [1], "--make-mhr") == 0) || (strcmp (argv [1], "-m") == 0)) { + if (argc > 3) + outName = argv [3]; + else + outName = "./oalsoft_hrtf_%r.mhr"; + outFormat = OF_MHR; + } else if ((strcmp (argv [1], "--make-tab") == 0) || (strcmp (argv [1], "-t") == 0)) { + if (argc > 3) + outName = argv [3]; + else + outName = "./hrtf_tables.inc"; + outFormat = OF_TABLE; + } else { + fprintf (stderr, "Error: Invalid command '%s'.\n", argv [1]); + return (-1); + } + argi = 2; + fftSize = 0; + equalize = DEFAULT_EQUALIZE; + surface = DEFAULT_SURFACE; + limit = DEFAULT_LIMIT; + truncSize = DEFAULT_TRUNCSIZE; + while (argi < argc) { + if (strncmp (argv [argi], "-f=", 3) == 0) { + fftSize = strtoul (& argv [argi] [3], & end, 10); + if ((end [0] != '\0') || (fftSize & (fftSize - 1)) || (fftSize < MIN_FFTSIZE) || (fftSize > MAX_FFTSIZE)) { + fprintf (stderr, "Error: Expected a power-of-two value from %d to %d for '-f'.\n", MIN_FFTSIZE, MAX_FFTSIZE); + return (-1); + } + } else if (strncmp (argv [argi], "-e=", 3) == 0) { + if (strcmp (& argv [argi] [3], "on") == 0) { + equalize = 1; + } else if (strcmp (& argv [argi] [3], "off") == 0) { + equalize = 0; + } else { + fprintf (stderr, "Error: Expected 'on' or 'off' for '-e'.\n"); + return (-1); + } + } else if (strncmp (argv [argi], "-s=", 3) == 0) { + if (strcmp (& argv [argi] [3], "on") == 0) { + surface = 1; + } else if (strcmp (& argv [argi] [3], "off") == 0) { + surface = 0; + } else { + fprintf (stderr, "Error: Expected 'on' or 'off' for '-s'.\n"); + return (-1); + } + } else if (strncmp (argv [argi], "-l=", 3) == 0) { + if (strcmp (& argv [argi] [3], "none") == 0) { + limit = 0.0; + } else { + limit = strtod (& argv [argi] [3], & end); + if ((end [0] != '\0') || (limit < MIN_LIMIT) || (limit > MAX_LIMIT)) { + fprintf (stderr, "Error: Expected 'none' or a value from %.2f to %.2f for '-l'.\n", MIN_LIMIT, MAX_LIMIT); + return (-1); + } + } + } else if (strncmp (argv [argi], "-w=", 3) == 0) { + truncSize = strtoul (& argv [argi] [3], & end, 10); + if ((end [0] != '\0') || (truncSize < MIN_TRUNCSIZE) || (truncSize > MAX_TRUNCSIZE) || (truncSize % MOD_TRUNCSIZE)) { + fprintf (stderr, "Error: Expected a value from %d to %d in multiples of %d for '-w'.\n", MIN_TRUNCSIZE, MAX_TRUNCSIZE, MOD_TRUNCSIZE); + return (-1); + } + } else if (strncmp (argv [argi], "-i=", 3) == 0) { + inName = & argv [argi] [3]; + } else if (strncmp (argv [argi], "-o=", 3) == 0) { + outName = & argv [argi] [3]; + } else { + fprintf (stderr, "Error: Invalid option '%s'.\n", argv [argi]); + return (-1); } - fprintf(stderr, "Done.\n"); - return 0; + argi ++; + } + if (! ProcessDefinition (inName, fftSize, equalize, surface, limit, truncSize, outFormat, outName)) + return (-1); + fprintf (stdout, "Operation completed.\n"); + return (0); } + + + + |