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Diffstat (limited to 'sound/softsynth/mt32/partial.cpp')
| -rw-r--r-- | sound/softsynth/mt32/partial.cpp | 912 |
1 files changed, 912 insertions, 0 deletions
diff --git a/sound/softsynth/mt32/partial.cpp b/sound/softsynth/mt32/partial.cpp new file mode 100644 index 0000000000..32ff9e9af7 --- /dev/null +++ b/sound/softsynth/mt32/partial.cpp @@ -0,0 +1,912 @@ +/* Copyright (c) 2003-2004 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. + */ + +#include <stdlib.h> +#include <math.h> +#include <string.h> + +#include "mt32emu.h" + +#define FIXEDPOINT_UDIV(x, y, point) (((x) << (point)) / ((y))) +#define FIXEDPOINT_SDIV(x, y, point) (((x) * (1 << point)) / ((y))) +#define FIXEDPOINT_UMULT(x, y, point) (((x) * (y)) >> point) +#define FIXEDPOINT_SMULT(x, y, point) (((x) * (y)) / (1 << point)) + +using namespace MT32Emu; + +Partial::Partial(Synth *useSynth) { + this->synth = useSynth; + ownerPart = -1; + poly = NULL; + pair = NULL; +#if MT32EMU_ACCURATENOTES == 1 + for (int i = 0; i < 3; i++) { + noteLookupStorage.waveforms[i] = new Bit16s[65536]; + } + noteLookup = ¬eLookupStorage; +#endif +} + +Partial::~Partial() { +#if MT32EMU_ACCURATENOTES == 1 + for (int i = 0; i < 3; i++) { + delete[] noteLookupStorage.waveforms[i]; + } +#endif +} + +int Partial::getOwnerPart() { + return ownerPart; +} + +bool Partial::isActive() { + return ownerPart > -1; +} + +void Partial::activate(int part) { + // This just marks the partial as being assigned to a part + ownerPart = part; +} + +void Partial::deactivate() { + ownerPart = -1; + if (poly != NULL) { + for (int i = 0; i < 4; i++) { + if (poly->partials[i] == this) { + poly->partials[i] = NULL; + break; + } + } + if (pair != NULL) { + pair->pair = NULL; + } + } +} + +void Partial::initKeyFollow(int key) { + // Setup partial keyfollow + // Note follow relative to middle C + + // Calculate keyfollow for pitch +#if 1 + float rel = key == -1 ? 0.0f : (key - MIDDLEC); + float newPitch = rel * patchCache->pitchKeyfollow + patchCache->pitch + patchCache->pitchShift; + //FIXME:KG: Does it truncate the keyfollowed pitch to a semitone (towards MIDDLEC)? + //int newKey = (int)(rel * patchCache->pitchKeyfollow); + //float newPitch = newKey + patchCache->pitch + patchCache->pitchShift; +#else + float rel = key == -1 ? 0.0f : (key + patchCache->pitchShift - MIDDLEC); + float newPitch = rel * patchCache->pitchKeyfollow + patchCache->pitch; +#endif +#if MT32EMU_ACCURATENOTES == 1 + noteVal = newPitch; + synth->printDebug("key=%d, pitch=%f, pitchKeyfollow=%f, pitchShift=%f, newPitch=%f", key, patchCache->pitch, patchCache->pitchKeyfollow, patchCache->pitchShift, newPitch); +#else + float newPitchInt; + float newPitchFract = modff(newPitch, &newPitchInt); + if (newPitchFract > 0.5f) { + newPitchInt += 1.0f; + newPitchFract -= 1.0f; + } + noteVal = (int)newPitchInt; + fineShift = (int)(powf(2.0f, newPitchFract / 12.0f) * 4096.0f); + synth->printDebug("key=%d, pitch=%f, pitchKeyfollow=%f, pitchShift=%f, newPitch=%f, noteVal=%d, fineShift=%d", key, patchCache->pitch, patchCache->pitchKeyfollow, patchCache->pitchShift, newPitch, noteVal, fineShift); +#endif + // FIXME:KG: Raise/lower by octaves until in the supported range. + while (noteVal > HIGHEST_NOTE) // FIXME:KG: see tables.cpp: >108? + noteVal -= 12; + while (noteVal < LOWEST_NOTE) // FIXME:KG: see tables.cpp: <12? + noteVal += 12; + // Calculate keyfollow for filter + int keyfollow = ((key - MIDDLEC) * patchCache->filtkeyfollow) / 4096; + if (keyfollow > 108) + keyfollow = 108; + if (keyfollow < -108) + keyfollow = -108; + filtVal = keytable[keyfollow + 108]; + realVal = keytable[(key - MIDDLEC) + 108]; +} + +void Partial::startPartial(dpoly *usePoly, const PatchCache *useCache, Partial *pairPartial) { + if (usePoly == NULL || useCache == NULL) { + synth->printDebug("*** Error: Starting partial for owner %d, usePoly=%s, useCache=%s", ownerPart, usePoly == NULL ? "*** NULL ***" : "OK", useCache == NULL ? "*** NULL ***" : "OK"); + return; + } + patchCache = useCache; + poly = usePoly; + mixType = patchCache->structureMix; + structurePosition = patchCache->structurePosition; + + play = true; + initKeyFollow(poly->freqnum); // Initialises noteVal, filtVal and realVal +#if MT32EMU_ACCURATENOTES == 0 + noteLookup = ¬eLookups[noteVal - LOWEST_NOTE]; +#else + TableInitialiser::initNote(synth, ¬eLookupStorage, noteVal, (float)synth->myProp.sampleRate, synth->masterTune, synth->PCMList, NULL); +#endif + + lfoPos = 0; + pulsewidth = patchCache->pulsewidth + pwveltable[patchCache->pwsens][poly->vel]; + if (pulsewidth > 100) { + pulsewidth = 100; + } else if (pulsewidth < 0) { + pulsewidth = 0; + } + + for (int e = 0; e < 3; e++) { + envs[e].envpos = 0; + envs[e].envstat = -1; + envs[e].envbase = 0; + envs[e].envdist = 0; + envs[e].envsize = 0; + envs[e].sustaining = false; + envs[e].decaying = false; + envs[e].prevlevel = 0; + envs[e].counter = 0; + envs[e].count = 0; + } + ampEnvVal = 0; + pitchEnvVal = 0; + pitchSustain = false; + loopPos = 0; + partialOff.pcmoffset = partialOff.pcmplace = 0; + pair = pairPartial; + useNoisePair = pairPartial == NULL && (mixType == 1 || mixType == 2); + age = 0; + alreadyOutputed = false; + memset(history,0,sizeof(history)); +} + +Bit16s *Partial::generateSamples(long length) { + if (!isActive() || alreadyOutputed) { + return NULL; + } + if (poly == NULL) { + synth->printDebug("*** ERROR: poly is NULL at Partial::generateSamples()!"); + return NULL; + } + + alreadyOutputed = true; + + // Generate samples + + Bit16s *partialBuf = &myBuffer[0]; + while (length--) { + Bit32s envval; + Bit32s sample = 0; + if (!envs[EnvelopeType_amp].sustaining) { + if (envs[EnvelopeType_amp].count <= 0) { + Bit32u ampval = getAmpEnvelope(); + if (!play) { + deactivate(); + break; + } + if (ampval > 127) { + ampval = 127; + } + + ampval = voltable[ampval]; + int tmpvel; + if (patchCache->ampenvdir == 1) + tmpvel = 127 - poly->vel; + else + tmpvel = poly->vel; + ampval = (ampval * ampveltable[tmpvel][(int)patchCache->ampEnv.velosens]) >> 8; + //if (envs[EnvelopeType_amp].sustaining) + ampEnvVal = ampval; + } + --envs[EnvelopeType_amp].count; + } + + int lfoat = 0x1000; + if (pitchSustain) { + // Calculate LFO position + // LFO does not kick in completely until pitch envelope sustains + if (patchCache->lfodepth > 0) { + lfoPos++; + if (lfoPos >= patchCache->lfoperiod) + lfoPos = 0; + int lfoatm = FIXEDPOINT_UDIV(lfoPos, patchCache->lfoperiod, 16); + int lfoatr = sintable[lfoatm]; + lfoat = lfoptable[patchCache->lfodepth][lfoatr]; + } + } else { + // Calculate Pitch envelope + envval = getPitchEnvelope(); + int pd = patchCache->pitchEnv.depth; + pitchEnvVal = penvtable[pd][envval]; + } + + int delta; + // These two are only for PCM partials, obviously + PCMWaveEntry *pcmWave = NULL; // Initialise to please compiler + Bit32u pcmAddr = 0; // Initialise to please compiler + + // Wrap positions or end if necessary + if (patchCache->PCMPartial) { + // PCM partial + int len; + pcmWave = &synth->PCMList[patchCache->pcm]; + + delta = noteLookup->wavTable[patchCache->pcm]; + pcmAddr = pcmWave->addr; + len = pcmWave->len; + if (partialOff.pcmplace >= len) { + if (pcmWave->loop) { + //partialOff.pcmplace = partialOff.pcmoffset = 0; + partialOff.pcmplace %= len; + } else { + play = false; + deactivate(); + break; + } + } + } else { + // Synthesis partial + delta = 0x10707; + partialOff.pcmplace %= (Bit16u)(noteLookup->div << 1); + } + + // Build delta for position of next sample + // Fix delta code + Bit64u tdelta = (Bit64u)delta; +#if MT32EMU_ACCURATENOTES == 0 + tdelta = (tdelta * fineShift) >> 12; +#endif + tdelta = (tdelta * pitchEnvVal) >> 12; + tdelta = (tdelta * lfoat) >> 12; + tdelta = (tdelta * bendShift) >> 12; + delta = (int)tdelta; + Bit32u volume = *poly->volumeptr; + + // Get waveform - either PCM or synthesized sawtooth or square + if (ampEnvVal > 0) { + if (patchCache->PCMPartial) { + // Render PCM sample + int ra, rb, dist; + Bit32u taddr; + if (delta < 0x10000) { + // Linear sound interpolation + taddr = pcmAddr + partialOff.pcmplace; + ra = synth->romfile[taddr]; + taddr++; + if (taddr == pcmAddr + pcmWave->len) { + // Past end of PCM + if (pcmWave->loop) { + rb = synth->romfile[pcmAddr]; + } else { + rb = 0; + } + } else { + rb = synth->romfile[taddr]; + } + dist = rb - ra; + sample = (ra + ((dist * (Bit32s)(partialOff.pcmoffset >> 8)) >> 8)); + } else { + // Sound decimation + // The right way to do it is to use a lowpass filter on the waveform before selecting + // a point. This is too slow. The following approximates this as fast as possible + int idelta = delta >> 16; + taddr = pcmAddr + partialOff.pcmplace; + ra = synth->romfile[taddr++]; + for (int ix = 0; ix < idelta - 1; ix++) { + if (taddr == pcmAddr + pcmWave->len) { + // Past end of PCM + if (pcmWave->loop) { + taddr = pcmAddr; + } else { + // Behave as if all subsequent samples were 0 + break; + } + } + ra += synth->romfile[taddr++]; + } + sample = ra / idelta; + } + } else { + // Render synthesised sample + Bit32u div = noteLookup->div; + int wf = patchCache->waveform; + int toff = partialOff.pcmplace; + int minorplace = partialOff.pcmoffset >> 14; + + Bit32s filtval = getFiltEnvelope(); + + //synth->printDebug("Filtval: %d", filtval); + + if (wf==0) { + // Square waveform. Made by combining two pregenerated bandlimited + // sawtooth waveforms + // Pulse width is not yet correct + if (div == 0) { + synth->printDebug("ERROR: div=0 generating square wave, this should never happen!"); + div = 1; + } + Bit32u ofsA = toff % div; + Bit32u ofsB = toff + FIXEDPOINT_UMULT(div, pulsetable[pulsewidth], 8); + ofsB = ofsB % div; + Bit16s pa = noteLookup->waveforms[0][(ofsA << 2) + minorplace]; + Bit16s pb = noteLookup->waveforms[0][(ofsB << 2) + minorplace]; + sample = (pa - pb) * 4; + // Non-bandlimited squarewave + /* + ofs = ((div << 1) * pulsetable[patchCache->pulsewidth]) >> 8; + if (toff < ofs) + sample = 1 * WGAMP; + else + sample = -1 * WGAMP; + */ + } else { + // Sawtooth. Made by combining the full cosine and half cosine according + // to how it looks on the MT-32. What it really does it takes the + // square wave and multiplies it by a full cosine + int waveoff = (toff << 2) + minorplace; + if (toff < noteLookup->sawTable[pulsewidth]) + sample = noteLookup->waveforms[1][waveoff % noteLookup->waveformSize[1]]; + else + sample = noteLookup->waveforms[2][waveoff % noteLookup->waveformSize[2]]; + sample = sample * 4; + // This is the correct way + // Seems slow to me (though bandlimited) -- doesn't seem to + // sound any better though + /* + //int pw = (patchCache->pulsewidth * pulsemod[filtval]) >> 8; + + Bit32u ofs = toff % div; + + Bit32u ofs3 = toff + FIXEDPOINT_UMULT(div, pulsetable[patchCache->pulsewidth], 8); + ofs3 = ofs3 % div; + + pa = noteLookup->waveforms[0][ofs]; + pb = noteLookup->waveforms[0][ofs3]; + sample = ((pa - pb) * noteLookup->waveforms[2][toff]) / WGAMP; + sample = sample *4; + */ + } + + //Very exact filter + if (filtval > ((FILTERGRAN * 15) / 16)) + filtval = ((FILTERGRAN * 15) / 16); + sample = (Bit32s)floor((synth->iirFilter)((float)sample, &history[0], filtcoeff[filtval][(int)patchCache->filtEnv.resonance], patchCache->filtEnv.resonance)); + } + } + + // Add calculated delta to our waveform offset + Bit32u absOff = ((partialOff.pcmplace << 16) | partialOff.pcmoffset); + absOff += delta; + partialOff.pcmplace = (Bit16u)((absOff & 0xFFFF0000) >> 16); + partialOff.pcmoffset = (Bit16u)(absOff & 0xFFFF); + + // Put volume envelope over generated sample + sample = FIXEDPOINT_SMULT(sample, ampEnvVal, 9); + sample = FIXEDPOINT_SMULT(sample, volume, 7); + envs[EnvelopeType_amp].envpos++; + envs[EnvelopeType_pitch].envpos++; + envs[EnvelopeType_filt].envpos++; + + *partialBuf++ = (Bit16s)sample; + } + // We may have deactivated and broken out of the loop before the end of the buffer, + // if so then fill the remainder with 0s. + if (++length > 0) + memset(partialBuf, 0, length * 2); + return &myBuffer[0]; +} + +void Partial::setBend(float factor) { + if (!patchCache->useBender || factor == 0.0f) { + bendShift = 4096; + return; + } + // NOTE:KG: We can't do this smoothly with lookup tables, unless we use several MB. + // FIXME:KG: Bend should be influenced by pitch key-follow too, according to docs. + float bendSemitones = factor * patchCache->benderRange; // -24 .. 24 + float mult = powf(2.0f, bendSemitones / 12.0f); + synth->printDebug("setBend(): factor=%f, benderRange=%f, semitones=%f, mult=%f\n", factor, patchCache->benderRange, bendSemitones, mult); + bendShift = (int)(mult * 4096.0f); +} + +Bit16s *Partial::mixBuffers(Bit16s * buf1, Bit16s *buf2, int len) { + if (buf1 == NULL) + return buf2; + if (buf2 == NULL) + return buf1; + + Bit16s *outBuf = buf1; +#if MT32EMU_USE_MMX >= 1 + // KG: This seems to be fine + int donelen = i386_mixBuffers(buf1, buf2, len); + len -= donelen; + buf1 += donelen; + buf2 += donelen; +#endif + while (len--) { + *buf1 = *buf1 + *buf2; + buf1++, buf2++; + } + return outBuf; +} + +Bit16s *Partial::mixBuffersRingMix(Bit16s * buf1, Bit16s *buf2, int len) { + if (buf1 == NULL) + return NULL; + if (buf2 == NULL) { + Bit16s *outBuf = buf1; + while (len--) { + if (*buf1 < -8192) + *buf1 = -8192; + else if (*buf1 > 8192) + *buf1 = 8192; + buf1++; + } + return outBuf; + } + + Bit16s *outBuf = buf1; +#if MT32EMU_USE_MMX >= 1 + // KG: This seems to be fine + int donelen = i386_mixBuffersRingMix(buf1, buf2, len); + len -= donelen; + buf1 += donelen; + buf2 += donelen; +#endif + while (len--) { + float a, b; + a = ((float)*buf1) / 8192.0f; + b = ((float)*buf2) / 8192.0f; + a = (a * b) + a; + if (a>1.0) + a = 1.0; + if (a<-1.0) + a = -1.0; + *buf1 = (Bit16s)(a * 8192.0f); + buf1++; + buf2++; + //buf1[i] = (Bit16s)(((Bit32s)buf1[i] * (Bit32s)buf2[i]) >> 10) + buf1[i]; + } + return outBuf; +} + +Bit16s *Partial::mixBuffersRing(Bit16s * buf1, Bit16s *buf2, int len) { + if (buf1 == NULL) { + return NULL; + } + if (buf2 == NULL) { + return NULL; + } + + Bit16s *outBuf = buf1; +#if MT32EMU_USE_MMX >= 1 + // FIXME:KG: Not really checked as working + int donelen = i386_mixBuffersRing(buf1, buf2, len); + len -= donelen; + buf1 += donelen; + buf2 += donelen; +#endif + while (len--) { + float a, b; + a = ((float)*buf1) / 8192.0f; + b = ((float)*buf2) / 8192.0f; + a *= b; + if (a>1.0) + a = 1.0; + if (a<-1.0) + a = -1.0; + *buf1 = (Bit16s)(a * 8192.0f); + buf1++; + buf2++; + } + return outBuf; +} + +void Partial::mixBuffersStereo(Bit16s *buf1, Bit16s *buf2, Bit16s *outBuf, int len) { + if (buf2 == NULL) { + while (len--) { + *outBuf++ = *buf1++; + *outBuf++ = 0; + } + } else if (buf1 == NULL) { + while (len--) { + *outBuf++ = 0; + *outBuf++ = *buf2++; + } + } else { + while (len--) { + *outBuf++ = *buf1++; + *outBuf++ = *buf2++; + } + } +} + +bool Partial::produceOutput(Bit16s *partialBuf, long length) { + if (!isActive() || alreadyOutputed) + return false; + if (poly == NULL) { + synth->printDebug("*** ERROR: poly is NULL at Partial::produceOutput()!"); + return false; + } + + Bit16s *pairBuf = NULL; + // Check for dependant partial + if (pair != NULL) { + if (!pair->alreadyOutputed) { + // Note: pair may have become NULL after this + pairBuf = pair->generateSamples(length); + } + } else if (useNoisePair) { + // Generate noise for pairless ring mix + pairBuf = smallnoise; + } + + Bit16s *myBuf = generateSamples(length); + + if (myBuf == NULL && pairBuf == NULL) + return false; + + Bit16s * p1buf, * p2buf; + + if (structurePosition == 0 || pairBuf == NULL) { + p1buf = myBuf; + p2buf = pairBuf; + } else { + p2buf = myBuf; + p1buf = pairBuf; + } + + //synth->printDebug("mixType: %d", mixType); + + Bit16s *mixedBuf; + switch(mixType) { + case 0: + // Standard sound mix + mixedBuf = mixBuffers(p1buf, p2buf, length); + break; + + case 1: + // Ring modulation with sound mix + mixedBuf = mixBuffersRingMix(p1buf, p2buf, length); + break; + + case 2: + // Ring modulation alone + mixedBuf = mixBuffersRing(p1buf, p2buf, length); + break; + + case 3: + // Stereo mixing. One partial to one speaker channel, one to another. + // FIXME:KG: Surely we should be multiplying by the left/right volumes here? + mixBuffersStereo(p1buf, p2buf, partialBuf, length); + return true; + + default: + mixedBuf = mixBuffers(p1buf, p2buf, length); + break; + } + + if (mixedBuf == NULL) + return false; + + Bit16s leftvol, rightvol; + leftvol = patchCache->pansetptr->leftvol; + rightvol = patchCache->pansetptr->rightvol; + +#if MT32EMU_USE_MMX >= 2 + // FIXME:KG: This appears to introduce crackle + int donelen = i386_partialProductOutput(length, leftvol, rightvol, partialBuf, mixedBuf); + length -= donelen; + mixedBuf += donelen; + partialBuf += donelen * 2; +#endif + while (length--) { + *partialBuf++ = (Bit16s)(((Bit32s)*mixedBuf * (Bit32s)leftvol) >> 16); + *partialBuf++ = (Bit16s)(((Bit32s)*mixedBuf * (Bit32s)rightvol) >> 16); + mixedBuf++; + } + return true; +} + +Bit32s Partial::getFiltEnvelope() { + int reshigh; + + int cutoff,depth,keyfollow, realfollow; + + EnvelopeStatus *tStat = &envs[EnvelopeType_filt]; + + keyfollow = filtVal; + realfollow = realVal; + + if (tStat->decaying) { + reshigh = tStat->envbase; + reshigh = (reshigh + ((tStat->envdist * tStat->envpos) / tStat->envsize)); + if (tStat->envpos >= tStat->envsize) + reshigh = 0; + } else { + if (tStat->envstat==4) { + reshigh = patchCache->filtsustain; + if (!poly->sustain) { + startDecay(EnvelopeType_filt, reshigh); + } + } else { + if ((tStat->envstat==-1) || (tStat->envpos >= tStat->envsize)) { + if (tStat->envstat==-1) + tStat->envbase = 0; + else + tStat->envbase = patchCache->filtEnv.envlevel[tStat->envstat]; + tStat->envstat++; + tStat->envpos = 0; + if (tStat->envstat == 3) { + tStat->envsize = lasttimetable[(int)patchCache->filtEnv.envtime[tStat->envstat]]; + } else { + tStat->envsize = (envtimetable[(int)patchCache->filtEnv.envtime[tStat->envstat]] * noteLookup->timekeyTable[(int)patchCache->filtEnv.envtkf]) >> 8; + } + + tStat->envsize++; + tStat->envdist = patchCache->filtEnv.envlevel[tStat->envstat] - tStat->envbase; + } + + reshigh = tStat->envbase; + reshigh = (reshigh + ((tStat->envdist * tStat->envpos) / tStat->envsize)); + + } + tStat->prevlevel = reshigh; + } + + cutoff = patchCache->filtEnv.cutoff; + + //if (patchCache->waveform==1) reshigh = (reshigh * 3) >> 2; + + depth = patchCache->filtEnv.envdepth; + + //int sensedep = (depth * 127-patchCache->filtEnv.envsense) >> 7; + depth = (depth * filveltable[poly->vel][(int)patchCache->filtEnv.envsense]) >> 8; + + int bias = patchCache->tvfbias; + int dist; + + if (bias!=0) { + //FIXME:KG: Is this really based on pitch (as now), or key pressed? + //synth->printDebug("Cutoff before %d", cutoff); + if (patchCache->tvfdir == 0) { + if (noteVal < bias) { + dist = bias - noteVal; + cutoff = (cutoff * fbiastable[patchCache->tvfblevel][dist]) >> 8; + } + } else { + // > Bias + if (noteVal > bias) { + dist = noteVal - bias; + cutoff = (cutoff * fbiastable[patchCache->tvfblevel][dist]) >> 8; + } + + } + //synth->printDebug("Cutoff after %d", cutoff); + } + + depth = (depth * noteLookup->fildepTable[patchCache->tvfdepth]) >> 8; + reshigh = (reshigh * depth) >> 7; + + Bit32s tmp; + + cutoff *= keyfollow; + cutoff /= realfollow; + + reshigh *= keyfollow; + reshigh /= realfollow; + + if (cutoff>100) + cutoff = 100; + else if (cutoff<0) + cutoff = 0; + if (reshigh>100) + reshigh = 100; + else if (reshigh<0) + reshigh = 0; + tmp = noteLookup->nfiltTable[cutoff][reshigh]; + //tmp *= keyfollow; + //tmp /= realfollow; + + //synth->printDebug("Cutoff %d, tmp %d, freq %d", cutoff, tmp, tmp * 256); + return tmp; +} + +bool Partial::shouldReverb() { + if (!isActive()) + return false; + return patchCache->reverb; +} + +Bit32u Partial::getAmpEnvelope() { + Bit32s tc; + + EnvelopeStatus *tStat = &envs[EnvelopeType_amp]; + + if (!play) + return 0; + + if (tStat->decaying) { + tc = tStat->envbase; + tc = (tc + ((tStat->envdist * tStat->envpos) / tStat->envsize)); + if (tc < 0) + tc = 0; + if ((tStat->envpos >= tStat->envsize) || (tc == 0)) { + play = false; + // Don't have to worry about prevlevel storage or anything, this partial's about to die + return 0; + } + } else { + if ((tStat->envstat==-1) || (tStat->envpos >= tStat->envsize)) { + if (tStat->envstat==-1) + tStat->envbase = 0; + else + tStat->envbase = patchCache->ampEnv.envlevel[tStat->envstat]; + tStat->envstat++; + tStat->envpos = 0; + + switch(tStat->envstat) { + case 0: + //Spot for velocity time follow + //Only used for first attack + tStat->envsize = (envtimetable[(int)patchCache->ampEnv.envtime[tStat->envstat]] * veltkeytable[(int)patchCache->ampEnv.envvkf][poly->vel]) >> 8; + //synth->printDebug("Envstat %d, size %d", tStat->envstat, tStat->envsize); + break; + case 3: + // Final attack envelope uses same time table as the decay + //tStat->envsize = decaytimetable[patchCache->ampEnv.envtime[tStat->envstat]]; + tStat->envsize = lasttimetable[(int)patchCache->ampEnv.envtime[tStat->envstat]]; + //synth->printDebug("Envstat %d, size %d", tStat->envstat, tStat->envsize); + break; + case 4: + //synth->printDebug("Envstat %d, size %d", tStat->envstat, tStat->envsize); + tc = patchCache->ampsustain; + if (!poly->sustain) + startDecay(EnvelopeType_amp, tc); + else + tStat->sustaining = true; + + goto PastCalc; + default: + //Spot for timekey follow + //Only used in subsquent envelope parameters, including the decay + tStat->envsize = (envtimetable[(int)patchCache->ampEnv.envtime[tStat->envstat]] * noteLookup->timekeyTable[(int)patchCache->ampEnv.envtkf]) >> 8; + + //synth->printDebug("Envstat %d, size %d", tStat->envstat, tStat->envsize); + break; + } + + tStat->envsize++; + tStat->envdist = patchCache->ampEnv.envlevel[tStat->envstat] - tStat->envbase; + + if (tStat->envdist != 0) { + tStat->counter = abs(tStat->envsize / tStat->envdist); + //synth->printDebug("Pos %d, envsize %d envdist %d", tStat->envstat, tStat->envsize, tStat->envdist); + } else { + tStat->counter = 0; + //synth->printDebug("Pos %d, envsize %d envdist %d", tStat->envstat, tStat->envsize, tStat->envdist); + } + } + tc = tStat->envbase; + tc = (tc + ((tStat->envdist * tStat->envpos) / tStat->envsize)); + tStat->count = tStat->counter; +PastCalc: + tc = (tc * (Bit32s)patchCache->amplevel) >> 7; + } + + // Prevlevel storage is bottle neck + tStat->prevlevel = tc; + + //Bias level crap stuff now + + for (int i = 0; i < 2; i++) { + if (patchCache->ampblevel[i]!=0) { + int bias = patchCache->ampbias[i]; + if (patchCache->ampdir[i]==0) { + // < Bias + if (noteVal < bias) { + int dist = bias - noteVal; + tc = (tc * ampbiastable[patchCache->ampblevel[i]][dist]) >> 8; + } + } else { + // > Bias + if (noteVal > bias) { + int dist = noteVal - bias; + tc = (tc * ampbiastable[patchCache->ampblevel[i]][dist]) >> 8; + } + } + } + } + if (tc < 0) { + synth->printDebug("*** ERROR: tc < 0 (%d) at getAmpEnvelope()", tc); + tc = 0; + } + return (Bit32u)tc; +} + +Bit32s Partial::getPitchEnvelope() { + EnvelopeStatus *tStat = &envs[EnvelopeType_pitch]; + + Bit32s tc; + pitchSustain = false; + if (tStat->decaying) { + if (tStat->envpos >= tStat->envsize) + tc = patchCache->pitchEnv.level[4]; + else { + tc = tStat->envbase; + tc = (tc + ((tStat->envdist * tStat->envpos) / tStat->envsize)); + } + } else { + if (tStat->envstat==3) { + tc = patchCache->pitchsustain; + if (poly->sustain) + pitchSustain = true; + else + startDecay(EnvelopeType_pitch, tc); + } else { + if ((tStat->envstat==-1) || (tStat->envpos >= tStat->envsize)) { + tStat->envstat++; + + tStat->envbase = patchCache->pitchEnv.level[tStat->envstat]; + tStat->envsize = (envtimetable[(int)patchCache->pitchEnv.time[tStat->envstat]] * noteLookup->timekeyTable[(int)patchCache->pitchEnv.timekeyfollow]) >> 8; + + tStat->envpos = 0; + tStat->envsize++; + tStat->envdist = patchCache->pitchEnv.level[tStat->envstat + 1] - tStat->envbase; + } + tc = tStat->envbase; + tc = (tc + ((tStat->envdist * tStat->envpos) / tStat->envsize)); + } + tStat->prevlevel = tc; + } + return tc; +} + +void Partial::startDecayAll() { + startDecay(EnvelopeType_amp, envs[EnvelopeType_amp].prevlevel); + startDecay(EnvelopeType_filt, envs[EnvelopeType_filt].prevlevel); + startDecay(EnvelopeType_pitch, envs[EnvelopeType_pitch].prevlevel); + pitchSustain = false; +} + +void Partial::startDecay(EnvelopeType envnum, Bit32s startval) { + EnvelopeStatus *tStat = &envs[envnum]; + + tStat->sustaining = false; + tStat->decaying = true; + tStat->envpos = 0; + tStat->envbase = startval; + + switch(envnum) { + case EnvelopeType_amp: + tStat->envsize = (decaytimetable[(int)patchCache->ampEnv.envtime[4]] * noteLookup->timekeyTable[(int)patchCache->ampEnv.envtkf]) >> 8; + tStat->envdist = -startval; + break; + case EnvelopeType_filt: + tStat->envsize = (decaytimetable[(int)patchCache->filtEnv.envtime[4]] * noteLookup->timekeyTable[(int)patchCache->filtEnv.envtkf]) >> 8; + tStat->envdist = -startval; + break; + case EnvelopeType_pitch: + tStat->envsize = (decaytimetable[(int)patchCache->pitchEnv.time[3]] * noteLookup->timekeyTable[(int)patchCache->pitchEnv.timekeyfollow]) >> 8 ; + tStat->envdist = patchCache->pitchEnv.level[4] - startval; + break; + default: + break; + } + tStat->envsize++; +} |