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Diffstat (limited to 'audio/softsynth/mt32/tables.cpp')
| -rw-r--r-- | audio/softsynth/mt32/tables.cpp | 761 |
1 files changed, 0 insertions, 761 deletions
diff --git a/audio/softsynth/mt32/tables.cpp b/audio/softsynth/mt32/tables.cpp deleted file mode 100644 index 9fdb595467..0000000000 --- a/audio/softsynth/mt32/tables.cpp +++ /dev/null @@ -1,761 +0,0 @@ -/* Copyright (c) 2003-2005 Various contributors - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - * IN THE SOFTWARE. - */ - - -// FIXME: Avoid using rand -#define FORBIDDEN_SYMBOL_EXCEPTION_rand - -#include <stdlib.h> -#include <string.h> -#include <math.h> - -#include "mt32emu.h" - -#if defined(MACOSX) || defined(SOLARIS) || defined(__MINGW32__) -// Older versions of Mac OS X didn't supply a powf function, so using it -// will cause a binary incompatibility when trying to run a binary built -// on a newer OS X release on an older one. And Solaris 8 doesn't provide -// powf, floorf, fabsf etc. at all. -// Cross-compiled MinGW32 toolchains suffer from a cross-compile bug in -// libstdc++. math/stubs.o should be empty, but it comes with a symbol for -// powf, resulting in a linker error because of multiple definitions. -// Hence we re-define them here. The only potential drawback is that it -// might be a little bit slower this way. -#define powf(x,y) ((float)pow(x,y)) -#define floorf(x) ((float)floor(x)) -#define fabsf(x) ((float)fabs(x)) -#endif - -#define FIXEDPOINT_MAKE(x, point) ((Bit32u)((1 << point) * x)) - -namespace MT32Emu { - -//Amplitude time velocity follow exponential coefficients -static const double tvcatconst[5] = {0.0, 0.002791309, 0.005942882, 0.012652792, 0.026938637}; -static const double tvcatmult[5] = {1.0, 1.072662811, 1.169129367, 1.288579123, 1.229630539}; - -// These are division constants for the TVF depth key follow -static const Bit32u depexp[5] = {3000, 950, 485, 255, 138}; - -//Envelope time keyfollow exponential coefficients -static const double tkcatconst[5] = {0.0, 0.005853144, 0.011148054, 0.019086143, 0.043333215}; -static const double tkcatmult[5] = {1.0, 1.058245688, 1.048488989, 1.016049301, 1.097538067}; - -// Begin filter stuff - -// Pre-warp the coefficients of a numerator or denominator. -// Note that a0 is assumed to be 1, so there is no wrapping -// of it. -static void prewarp(double *a1, double *a2, double fc, double fs) { - double wp; - - wp = 2.0 * fs * tan(DOUBLE_PI * fc / fs); - - *a2 = *a2 / (wp * wp); - *a1 = *a1 / wp; -} - -// Transform the numerator and denominator coefficients -// of s-domain biquad section into corresponding -// z-domain coefficients. -// -// Store the 4 IIR coefficients in array pointed by coef -// in following order: -// beta1, beta2 (denominator) -// alpha1, alpha2 (numerator) -// -// Arguments: -// a0-a2 - s-domain numerator coefficients -// b0-b2 - s-domain denominator coefficients -// k - filter gain factor. initially set to 1 -// and modified by each biquad section in such -// a way, as to make it the coefficient by -// which to multiply the overall filter gain -// in order to achieve a desired overall filter gain, -// specified in initial value of k. -// fs - sampling rate (Hz) -// coef - array of z-domain coefficients to be filled in. -// -// Return: -// On return, set coef z-domain coefficients -static void bilinear(double a0, double a1, double a2, double b0, double b1, double b2, double *k, double fs, float *coef) { - double ad, bd; - - // alpha (Numerator in s-domain) - ad = 4. * a2 * fs * fs + 2. * a1 * fs + a0; - // beta (Denominator in s-domain) - bd = 4. * b2 * fs * fs + 2. * b1* fs + b0; - - // update gain constant for this section - *k *= ad/bd; - - // Denominator - *coef++ = (float)((2. * b0 - 8. * b2 * fs * fs) / bd); // beta1 - *coef++ = (float)((4. * b2 * fs * fs - 2. * b1 * fs + b0) / bd); // beta2 - - // Nominator - *coef++ = (float)((2. * a0 - 8. * a2 * fs * fs) / ad); // alpha1 - *coef = (float)((4. * a2 * fs * fs - 2. * a1 * fs + a0) / ad); // alpha2 -} - -// a0-a2: numerator coefficients -// b0-b2: denominator coefficients -// fc: Filter cutoff frequency -// fs: sampling rate -// k: overall gain factor -// coef: pointer to 4 iir coefficients -static void szxform(double *a0, double *a1, double *a2, double *b0, double *b1, double *b2, double fc, double fs, double *k, float *coef) { - // Calculate a1 and a2 and overwrite the original values - prewarp(a1, a2, fc, fs); - prewarp(b1, b2, fc, fs); - bilinear(*a0, *a1, *a2, *b0, *b1, *b2, k, fs, coef); -} - -static void initFilter(float fs, float fc, float *icoeff, float Q) { - float *coef; - double a0, a1, a2, b0, b1, b2; - - double k = 1.5; // Set overall filter gain factor - coef = icoeff + 1; // Skip k, or gain - - // Section 1 - a0 = 1.0; - a1 = 0; - a2 = 0; - b0 = 1.0; - b1 = 0.765367 / Q; // Divide by resonance or Q - b2 = 1.0; - szxform(&a0, &a1, &a2, &b0, &b1, &b2, fc, fs, &k, coef); - coef += 4; // Point to next filter section - - // Section 2 - a0 = 1.0; - a1 = 0; - a2 = 0; - b0 = 1.0; - b1 = 1.847759 / Q; - b2 = 1.0; - szxform(&a0, &a1, &a2, &b0, &b1, &b2, fc, fs, &k, coef); - - icoeff[0] = (float)k; -} - -void Tables::initFiltCoeff(float samplerate) { - for (int j = 0; j < FILTERGRAN; j++) { - for (int res = 0; res < 31; res++) { - float tres = resonanceFactor[res]; - initFilter((float)samplerate, (((float)(j+1.0)/FILTERGRAN)) * ((float)samplerate/2), filtCoeff[j][res], tres); - } - } -} - -void Tables::initEnvelopes(float samplerate) { - for (int lf = 0; lf <= 100; lf++) { - float elf = (float)lf; - - // General envelope - // This formula fits observation of the CM-32L by +/- 0.03s or so for the second time value in the filter, - // when all other times were 0 and all levels were 100. Note that variations occur depending on the level - // delta of the section, which we're not fully emulating. - float seconds = powf(2.0f, (elf / 8.0f) + 7.0f) / 32768.0f; - int samples = (int)(seconds * samplerate); - envTime[lf] = samples; - - // Cap on envelope times depending on the level delta - if (elf == 0) { - envDeltaMaxTime[lf] = 63; - } else { - float cap = 11.0f * (float)log(elf) + 64; - if (cap > 100.0f) { - cap = 100.0f; - } - envDeltaMaxTime[lf] = (int)cap; - } - - - // This (approximately) represents the time durations when the target level is 0. - // Not sure why this is a special case, but it's seen to be from the real thing. - seconds = powf(2, (elf / 8.0f) + 6) / 32768.0f; - envDecayTime[lf] = (int)(seconds * samplerate); - - // I am certain of this: Verified by hand LFO log - lfoPeriod[lf] = (Bit32u)(((float)samplerate) / (powf(1.088883372f, (float)lf) * 0.021236044f)); - } -} - -void Tables::initMT32ConstantTables(Synth *synth) { - int lf; - synth->printDebug("Initializing Pitch Tables"); - for (lf = -108; lf <= 108; lf++) { - tvfKeyfollowMult[lf + 108] = (int)(256 * powf(2.0f, (float)(lf / 24.0f))); - //synth->printDebug("KT %d = %d", f, keytable[f+108]); - } - - for (int res = 0; res < 31; res++) { - resonanceFactor[res] = powf((float)res / 30.0f, 5.0f) + 1.0f; - } - - int period = 65536; - - for (int ang = 0; ang < period; ang++) { - int halfang = (period / 2); - int angval = ang % halfang; - float tval = (((float)angval / (float)halfang) - 0.5f) * 2; - if (ang >= halfang) - tval = -tval; - sintable[ang] = (Bit16s)(tval * 50.0f) + 50; - } - - int velt, dep; - float tempdep; - for (velt = 0; velt < 128; velt++) { - for (dep = 0; dep < 5; dep++) { - if (dep > 0) { - float ff = (float)(exp(3.5f * tvcatconst[dep] * (59.0f - (float)velt)) * tvcatmult[dep]); - tempdep = 256.0f * ff; - envTimeVelfollowMult[dep][velt] = (int)tempdep; - //if ((velt % 16) == 0) { - // synth->printDebug("Key %d, depth %d, factor %d", velt, dep, (int)tempdep); - //} - } else - envTimeVelfollowMult[dep][velt] = 256; - } - - for (dep = -7; dep < 8; dep++) { - float fldep = (float)abs(dep) / 7.0f; - fldep = powf(fldep,2.5f); - if (dep < 0) - fldep = fldep * -1.0f; - pwVelfollowAdd[dep+7][velt] = Bit32s((fldep * (float)velt * 100) / 128.0); - } - } - - for (dep = 0; dep <= 100; dep++) { - for (velt = 0; velt < 128; velt++) { - float fdep = (float)dep * 0.000347013f; // Another MT-32 constant - float fv = ((float)velt - 64.0f)/7.26f; - float flogdep = powf(10, fdep * fv); - float fbase; - - if (velt > 64) - synth->tables.tvfVelfollowMult[velt][dep] = (int)(flogdep * 256.0); - else { - //lff = 1 - (pow(((128.0 - (float)lf) / 64.0),.25) * ((float)velt / 96)); - fbase = 1 - (powf(((float)dep / 100.0f),.25f) * ((float)(64-velt) / 96.0f)); - synth->tables.tvfVelfollowMult[velt][dep] = (int)(fbase * 256.0); - } - //synth->printDebug("Filvel dep %d velt %d = %x", dep, velt, filveltable[velt][dep]); - } - } - - for (lf = 0; lf < 128; lf++) { - float veloFract = lf / 127.0f; - for (int velsens = 0; velsens <= 100; velsens++) { - float sensFract = (velsens - 50) / 50.0f; - if (velsens < 50) { - tvaVelfollowMult[lf][velsens] = FIXEDPOINT_MAKE(1.0f / powf(2.0f, veloFract * -sensFract * 127.0f / 20.0f), 8); - } else { - tvaVelfollowMult[lf][velsens] = FIXEDPOINT_MAKE(1.0f / powf(2.0f, (1.0f - veloFract) * sensFract * 127.0f / 20.0f), 8); - } - } - } - - for (lf = 0; lf <= 100; lf++) { - // Converts the 0-100 range used by the MT-32 to volume multiplier - volumeMult[lf] = FIXEDPOINT_MAKE(powf((float)lf / 100.0f, FLOAT_LN), 7); - } - - for (lf = 0; lf <= 100; lf++) { - float mv = lf / 100.0f; - float pt = mv - 0.5f; - if (pt < 0) - pt = 0; - - // Original (CC version) - //pwFactor[lf] = (int)(pt * 210.04f) + 128; - - // Approximation from sample comparison - pwFactor[lf] = (int)(pt * 179.0f) + 128; - } - - for (unsigned int i = 0; i < MAX_SAMPLE_OUTPUT; i++) { - int myRand; - myRand = rand(); - //myRand = ((myRand - 16383) * 7168) >> 16; - // This one is slower but works with all values of RAND_MAX - myRand = (int)((myRand - RAND_MAX / 2) / (float)RAND_MAX * (7168 / 2)); - //FIXME:KG: Original ultimately set the lowest two bits to 0, for no obvious reason - noiseBuf[i] = (Bit16s)myRand; - } - - float tdist; - float padjtable[51]; - for (lf = 0; lf <= 50; lf++) { - if (lf == 0) - padjtable[lf] = 7; - else if (lf == 1) - padjtable[lf] = 6; - else if (lf == 2) - padjtable[lf] = 5; - else if (lf == 3) - padjtable[lf] = 4; - else if (lf == 4) - padjtable[lf] = 4 - (0.333333f); - else if (lf == 5) - padjtable[lf] = 4 - (0.333333f * 2); - else if (lf == 6) - padjtable[lf] = 3; - else if ((lf > 6) && (lf <= 12)) { - tdist = (lf-6.0f) / 6.0f; - padjtable[lf] = 3.0f - tdist; - } else if ((lf > 12) && (lf <= 25)) { - tdist = (lf - 12.0f) / 13.0f; - padjtable[lf] = 2.0f - tdist; - } else { - tdist = (lf - 25.0f) / 25.0f; - padjtable[lf] = 1.0f - tdist; - } - //synth->printDebug("lf %d = padj %f", lf, (double)padjtable[lf]); - } - - float lfp, depf, finalval, tlf; - int depat, pval, depti; - for (lf = 0; lf <= 10; lf++) { - // I believe the depth is cubed or something - - for (depat = 0; depat <= 100; depat++) { - if (lf > 0) { - depti = abs(depat - 50); - tlf = (float)lf - padjtable[depti]; - if (tlf < 0) - tlf = 0; - lfp = (float)exp(0.713619942f * tlf) / 407.4945111f; - - if (depat < 50) - finalval = 4096.0f * powf(2, -lfp); - else - finalval = 4096.0f * powf(2, lfp); - pval = (int)finalval; - - pitchEnvVal[lf][depat] = pval; - //synth->printDebug("lf %d depat %d pval %d tlf %f lfp %f", lf,depat,pval, (double)tlf, (double)lfp); - } else { - pitchEnvVal[lf][depat] = 4096; - //synth->printDebug("lf %d depat %d pval 4096", lf, depat); - } - } - } - for (lf = 0; lf <= 100; lf++) { - // It's linear - verified on MT-32 - one of the few things linear - lfp = ((float)lf * 0.1904f) / 310.55f; - - for (depat = 0; depat <= 100; depat++) { - depf = ((float)depat - 50.0f) / 50.0f; - //finalval = pow(2, lfp * depf * .5); - finalval = 4096.0f + (4096.0f * lfp * depf); - - pval = (int)finalval; - - lfoShift[lf][depat] = pval; - - //synth->printDebug("lf %d depat %d pval %x", lf,depat,pval); - } - } - - for (lf = 0; lf <= 12; lf++) { - for (int distval = 0; distval < 128; distval++) { - float amplog, dval; - if (lf == 0) { - amplog = 0; - dval = 1; - tvaBiasMult[lf][distval] = 256; - } else { - /* - amplog = powf(1.431817011f, (float)lf) / FLOAT_PI; - dval = ((128.0f - (float)distval) / 128.0f); - amplog = exp(amplog); - dval = powf(amplog, dval) / amplog; - tvaBiasMult[lf][distval] = (int)(dval * 256.0); - */ - // Lets assume for a second it's linear - - // Distance of full volume reduction - amplog = (float)(12.0f / (float)lf) * 24.0f; - if (distval > amplog) { - tvaBiasMult[lf][distval] = 0; - } else { - dval = (amplog - (float)distval) / amplog; - tvaBiasMult[lf][distval] = (int)(dval * 256.0f); - } - } - //synth->printDebug("Ampbias lf %d distval %d = %f (%x) %f", lf, distval, (double)dval, tvaBiasMult[lf][distval],(double)amplog); - } - } - - for (lf = 0; lf <= 14; lf++) { - for (int distval = 0; distval < 128; distval++) { - float filval = fabsf((float)((lf - 7) * 12) / 7.0f); - float amplog, dval; - if (lf == 7) { - amplog = 0; - dval = 1; - tvfBiasMult[lf][distval] = 256; - } else { - //amplog = pow(1.431817011, filval) / FLOAT_PI; - amplog = powf(1.531817011f, filval) / FLOAT_PI; - dval = (128.0f - (float)distval) / 128.0f; - amplog = (float)exp(amplog); - dval = powf(amplog,dval)/amplog; - if (lf < 8) { - tvfBiasMult[lf][distval] = (int)(dval * 256.0f); - } else { - dval = powf(dval, 0.3333333f); - if (dval < 0.01f) - dval = 0.01f; - dval = 1 / dval; - tvfBiasMult[lf][distval] = (int)(dval * 256.0f); - } - } - //synth->printDebug("Fbias lf %d distval %d = %f (%x) %f", lf, distval, (double)dval, tvfBiasMult[lf][distval],(double)amplog); - } - } -} - -// Per-note table initialisation follows - -static void initSaw(NoteLookup *noteLookup, Bit32s div2) { - int tmpdiv = div2 << 16; - for (int rsaw = 0; rsaw <= 100; rsaw++) { - float fsaw; - if (rsaw < 50) - fsaw = 50.0f; - else - fsaw = (float)rsaw; - - //(66 - (((A8 - 50) / 50) ^ 0.63) * 50) / 132 - float sawfact = (66.0f - (powf((fsaw - 50.0f) / 50.0f, 0.63f) * 50.0f)) / 132.0f; - noteLookup->sawTable[rsaw] = (int)(sawfact * (float)tmpdiv) >> 16; - //synth->printDebug("F %d divtable %d saw %d sawtable %d", f, div, rsaw, sawtable[f][rsaw]); - } -} - -static void initDep(KeyLookup *keyLookup, float f) { - for (int dep = 0; dep < 5; dep++) { - if (dep == 0) { - keyLookup->envDepthMult[dep] = 256; - keyLookup->envTimeMult[dep] = 256; - } else { - float depfac = 3000.0f; - float ff, tempdep; - depfac = (float)depexp[dep]; - - ff = (f - (float)MIDDLEC) / depfac; - tempdep = powf(2, ff) * 256.0f; - keyLookup->envDepthMult[dep] = (int)tempdep; - - ff = (float)(exp(tkcatconst[dep] * ((float)MIDDLEC - f)) * tkcatmult[dep]); - keyLookup->envTimeMult[dep] = (int)(ff * 256.0f); - } - } - //synth->printDebug("F %f d1 %x d2 %x d3 %x d4 %x d5 %x", (double)f, noteLookup->fildepTable[0], noteLookup->fildepTable[1], noteLookup->fildepTable[2], noteLookup->fildepTable[3], noteLookup->fildepTable[4]); -} - -Bit16s Tables::clampWF(Synth *synth, const char *n, float ampVal, double input) { - Bit32s x = (Bit32s)(input * ampVal); - if (x < -ampVal - 1) { - synth->printDebug("%s==%d<-WGAMP-1!", n, x); - x = (Bit32s)(-ampVal - 1); - } else if (x > ampVal) { - synth->printDebug("%s==%d>WGAMP!", n, x); - x = (Bit32s)ampVal; - } - return (Bit16s)x; -} - -File *Tables::initWave(Synth *synth, NoteLookup *noteLookup, float ampVal, float div2, File *file) { - int iDiv2 = (int)div2; - noteLookup->waveformSize[0] = iDiv2 << 1; - noteLookup->waveformSize[1] = iDiv2 << 1; - noteLookup->waveformSize[2] = iDiv2 << 2; - for (int i = 0; i < 3; i++) { - if (noteLookup->waveforms[i] == NULL) { - noteLookup->waveforms[i] = new Bit16s[noteLookup->waveformSize[i]]; - } - } - if (file != NULL) { - for (int i = 0; i < 3 && file != NULL; i++) { - size_t len = noteLookup->waveformSize[i]; - for (unsigned int j = 0; j < len; j++) { - if (!file->readBit16u((Bit16u *)¬eLookup->waveforms[i][j])) { - synth->printDebug("Error reading wave file cache!"); - file->close(); - file = NULL; - break; - } - } - } - } - if (file == NULL) { - double sd = DOUBLE_PI / div2; - - for (int fa = 0; fa < (iDiv2 << 1); fa++) { - // sa ranges from 0 to 2PI - double sa = fa * sd; - - // Calculate a sample for the bandlimited sawtooth wave - double saw = 0.0; - int sincs = iDiv2 >> 1; - double sinus = 1.0; - for (int sincNum = 1; sincNum <= sincs; sincNum++) { - saw += sin(sinus * sa) / sinus; - sinus++; - } - - // This works pretty well - // Multiplied by 0.84 so that the spikes caused by bandlimiting don't overdrive the amplitude - noteLookup->waveforms[0][fa] = clampWF(synth, "saw", ampVal, -saw / (0.5 * DOUBLE_PI) * 0.84); - noteLookup->waveforms[1][fa] = clampWF(synth, "cos", ampVal, -cos(sa / 2.0)); - noteLookup->waveforms[2][fa * 2] = clampWF(synth, "cosoff_0", ampVal, -cos(sa - DOUBLE_PI)); - noteLookup->waveforms[2][fa * 2 + 1] = clampWF(synth, "cosoff_1", ampVal, -cos((sa + (sd / 2)) - DOUBLE_PI)); - } - } - return file; -} - -static void initFiltTable(NoteLookup *noteLookup, float freq, float rate) { - for (int tr = 0; tr <= 200; tr++) { - float ftr = (float)tr; - - // Verified exact on MT-32 - if (tr > 100) - ftr = 100.0f + (powf((ftr - 100.0f) / 100.0f, 3.0f) * 100.0f); - - // I think this is the one - float brsq = powf(10.0f, (tr / 50.0f) - 1.0f); - noteLookup->filtTable[0][tr] = (int)((freq * brsq) / (rate / 2) * FILTERGRAN); - if (noteLookup->filtTable[0][tr]>=((FILTERGRAN*15)/16)) - noteLookup->filtTable[0][tr] = ((FILTERGRAN*15)/16); - - float brsa = powf(10.0f, ((tr / 55.0f) - 1.0f)) / 2.0f; - noteLookup->filtTable[1][tr] = (int)((freq * brsa) / (rate / 2) * FILTERGRAN); - if (noteLookup->filtTable[1][tr]>=((FILTERGRAN*15)/16)) - noteLookup->filtTable[1][tr] = ((FILTERGRAN*15)/16); - } -} - -static void initNFiltTable(NoteLookup *noteLookup, float freq, float rate) { - for (int cf = 0; cf <= 100; cf++) { - float cfmult = (float)cf; - - for (int tf = 0;tf <= 100; tf++) { - float tfadd = (float)tf; - - //float freqsum = exp((cfmult + tfadd) / 30.0f) / 4.0f; - //float freqsum = 0.15f * exp(0.45f * ((cfmult + tfadd) / 10.0f)); - - float freqsum = powf(2.0f, ((cfmult + tfadd) - 40.0f) / 16.0f); - - noteLookup->nfiltTable[cf][tf] = (int)((freq * freqsum) / (rate / 2) * FILTERGRAN); - if (noteLookup->nfiltTable[cf][tf] >= ((FILTERGRAN * 15) / 16)) - noteLookup->nfiltTable[cf][tf] = ((FILTERGRAN * 15) / 16); - } - } -} - -File *Tables::initNote(Synth *synth, NoteLookup *noteLookup, float note, float rate, float masterTune, PCMWaveEntry *pcmWaves, File *file) { - float freq = (float)(masterTune * pow(2.0, ((double)note - MIDDLEA) / 12.0)); - float div2 = rate * 2.0f / freq; - noteLookup->div2 = (int)div2; - - if (noteLookup->div2 == 0) - noteLookup->div2 = 1; - - initSaw(noteLookup, noteLookup->div2); - - //synth->printDebug("Note %f; freq=%f, div=%f", (double)note, (double)freq, (double) rate / freq); - file = initWave(synth, noteLookup, WGAMP, div2, file); - - // Create the pitch tables - if (noteLookup->wavTable == NULL) - noteLookup->wavTable = new Bit32u[synth->controlROMMap->pcmCount]; - double rateMult = 32000.0 / rate; - double tuner = freq * 65536.0f; - for (int pc = 0; pc < synth->controlROMMap->pcmCount; pc++) { - noteLookup->wavTable[pc] = (int)(tuner / pcmWaves[pc].tune * rateMult); - } - - initFiltTable(noteLookup, freq, rate); - initNFiltTable(noteLookup, freq, rate); - return file; -} - -bool Tables::initNotes(Synth *synth, PCMWaveEntry *pcmWaves, float rate, float masterTune) { - const char *NoteNames[12] = { - "C ", "C#", "D ", "D#", "E ", "F ", "F#", "G ", "G#", "A ", "A#", "B " - }; - char filename[64]; - int intRate = (int)rate; - char version[4] = {0, 0, 0, 5}; - sprintf(filename, "waveformcache-%d-%.2f.raw", intRate, (double)masterTune); - - File *file = NULL; - char header[20]; - memcpy(header, "MT32WAVE", 8); - int pos = 8; - // Version... - for (int i = 0; i < 4; i++) - header[pos++] = version[i]; - header[pos++] = (char)((intRate >> 24) & 0xFF); - header[pos++] = (char)((intRate >> 16) & 0xFF); - header[pos++] = (char)((intRate >> 8) & 0xFF); - header[pos++] = (char)(intRate & 0xFF); - int intTuning = (int)masterTune; - header[pos++] = (char)((intTuning >> 8) & 0xFF); - header[pos++] = (char)(intTuning & 0xFF); - header[pos++] = 0; - header[pos] = (char)((masterTune - intTuning) * 10); -#if MT32EMU_WAVECACHEMODE < 2 - bool reading = false; - file = synth->openFile(filename, File::OpenMode_read); - if (file != NULL) { - char fileHeader[20]; - if (file->read(fileHeader, 20) == 20) { - if (memcmp(fileHeader, header, 20) == 0) { - Bit16u endianCheck; - if (file->readBit16u(&endianCheck)) { - if (endianCheck == 1) { - reading = true; - } else { - synth->printDebug("Endian check in %s does not match expected", filename); - } - } else { - synth->printDebug("Unable to read endian check in %s", filename); - } - } else { - synth->printDebug("Header of %s does not match expected", filename); - } - } else { - synth->printDebug("Error reading 16 bytes of %s", filename); - } - if (!reading) { - file->close(); - file = NULL; - } - } else { - synth->printDebug("Unable to open %s for reading", filename); - } -#endif - - float progress = 0.0f; - bool abort = false; - synth->report(ReportType_progressInit, &progress); - for (int f = LOWEST_NOTE; f <= HIGHEST_NOTE; f++) { - synth->printDebug("Initializing note %s%d", NoteNames[f % 12], (f / 12) - 2); - NoteLookup *noteLookup = ¬eLookups[f - LOWEST_NOTE]; - file = initNote(synth, noteLookup, (float)f, rate, masterTune, pcmWaves, file); - progress = (f - LOWEST_NOTE + 1) / (float)NUM_NOTES; - abort = synth->report(ReportType_progressInit, &progress) != 0; - if (abort) - break; - } - -#if MT32EMU_WAVECACHEMODE == 0 || MT32EMU_WAVECACHEMODE == 2 - if (file == NULL) { - file = synth->openFile(filename, File::OpenMode_write); - if (file != NULL) { - if (file->write(header, 20) == 20 && file->writeBit16u(1)) { - for (int f = 0; f < NUM_NOTES; f++) { - for (int i = 0; i < 3 && file != NULL; i++) { - int len = noteLookups[f].waveformSize[i]; - for (int j = 0; j < len; j++) { - if (!file->writeBit16u(noteLookups[f].waveforms[i][j])) { - synth->printDebug("Error writing waveform cache file"); - file->close(); - file = NULL; - break; - } - } - } - } - } else { - synth->printDebug("Error writing 16-byte header to %s - won't continue saving", filename); - } - } else { - synth->printDebug("Unable to open %s for writing - won't be created", filename); - } - } -#endif - - if (file != NULL) - synth->closeFile(file); - return !abort; -} - -void Tables::freeNotes() { - for (int t = 0; t < 3; t++) { - for (int m = 0; m < NUM_NOTES; m++) { - if (noteLookups[m].waveforms[t] != NULL) { - delete[] noteLookups[m].waveforms[t]; - noteLookups[m].waveforms[t] = NULL; - noteLookups[m].waveformSize[t] = 0; - } - if (noteLookups[m].wavTable != NULL) { - delete[] noteLookups[m].wavTable; - noteLookups[m].wavTable = NULL; - } - } - } - initializedMasterTune = 0.0f; -} - -Tables::Tables() { - initializedSampleRate = 0.0f; - initializedMasterTune = 0.0f; - memset(¬eLookups, 0, sizeof(noteLookups)); -} - -bool Tables::init(Synth *synth, PCMWaveEntry *pcmWaves, float sampleRate, float masterTune) { - if (sampleRate <= 0.0f) { - synth->printDebug("Bad sampleRate (%f <= 0.0f)", (double)sampleRate); - return false; - } - if (initializedSampleRate == 0.0f) { - initMT32ConstantTables(synth); - } - if (initializedSampleRate != sampleRate) { - initFiltCoeff(sampleRate); - initEnvelopes(sampleRate); - for (int key = 12; key <= 108; key++) { - initDep(&keyLookups[key - 12], (float)key); - } - } - if (initializedSampleRate != sampleRate || initializedMasterTune != masterTune) { - freeNotes(); - if (!initNotes(synth, pcmWaves, sampleRate, masterTune)) { - return false; - } - initializedSampleRate = sampleRate; - initializedMasterTune = masterTune; - } - return true; -} - -} |