diff options
Diffstat (limited to 'audio/softsynth/mt32/Synth.cpp')
| -rw-r--r-- | audio/softsynth/mt32/Synth.cpp | 663 |
1 files changed, 365 insertions, 298 deletions
diff --git a/audio/softsynth/mt32/Synth.cpp b/audio/softsynth/mt32/Synth.cpp index b7af992b99..efba9b7514 100644 --- a/audio/softsynth/mt32/Synth.cpp +++ b/audio/softsynth/mt32/Synth.cpp @@ -26,15 +26,7 @@ #include "mt32emu.h" #include "mmath.h" #include "PartialManager.h" - -#if MT32EMU_USE_REVERBMODEL == 1 -#include "AReverbModel.h" -#elif MT32EMU_USE_REVERBMODEL == 2 #include "BReverbModel.h" -#else -#include "FreeverbModel.h" -#endif -#include "DelayReverb.h" namespace MT32Emu { @@ -50,84 +42,22 @@ static const ControlROMMap ControlROMMaps[7] = { // (Note that all but CM-32L ROM actually have 86 entries for rhythmTemp) }; -static inline Bit16s *streamOffset(Bit16s *stream, Bit32u pos) { - return stream == NULL ? NULL : stream + pos; -} - -static inline void clearIfNonNull(Bit16s *stream, Bit32u len) { - if (stream != NULL) { - memset(stream, 0, len * sizeof(Bit16s)); - } -} - -static inline void mix(float *target, const float *stream, Bit32u len) { - while (len--) { - *target += *stream; - stream++; - target++; - } -} +static inline void muteStream(Sample *stream, Bit32u len) { + if (stream == NULL) return; -static inline void clearFloats(float *leftBuf, float *rightBuf, Bit32u len) { +#if MT32EMU_USE_FLOAT_SAMPLES // FIXME: Use memset() where compatibility is guaranteed (if this turns out to be a win) while (len--) { - *leftBuf++ = 0.0f; - *rightBuf++ = 0.0f; - } -} - -static inline Bit16s clipBit16s(Bit32s a) { - // Clamp values above 32767 to 32767, and values below -32768 to -32768 - if ((a + 32768) & ~65535) { - return (a >> 31) ^ 32767; - } - return a; -} - -static void floatToBit16s_nice(Bit16s *target, const float *source, Bit32u len, float outputGain) { - float gain = outputGain * 16384.0f; - while (len--) { - // Since we're not shooting for accuracy here, don't worry about the rounding mode. - *target = clipBit16s((Bit32s)(*source * gain)); - source++; - target++; - } -} - -static void floatToBit16s_pure(Bit16s *target, const float *source, Bit32u len, float /*outputGain*/) { - while (len--) { - *target = clipBit16s((Bit32s)floor(*source * 8192.0f)); - source++; - target++; - } -} - -static void floatToBit16s_reverb(Bit16s *target, const float *source, Bit32u len, float outputGain) { - float gain = outputGain * 8192.0f; - while (len--) { - *target = clipBit16s((Bit32s)floor(*source * gain)); - source++; - target++; - } -} - -static void floatToBit16s_generation1(Bit16s *target, const float *source, Bit32u len, float outputGain) { - float gain = outputGain * 8192.0f; - while (len--) { - *target = clipBit16s((Bit32s)floor(*source * gain)); - *target = (*target & 0x8000) | ((*target << 1) & 0x7FFE); - source++; - target++; + *stream++ = 0.0f; } +#else + memset(stream, 0, len * sizeof(Sample)); +#endif } -static void floatToBit16s_generation2(Bit16s *target, const float *source, Bit32u len, float outputGain) { - float gain = outputGain * 8192.0f; - while (len--) { - *target = clipBit16s((Bit32s)floor(*source * gain)); - *target = (*target & 0x8000) | ((*target << 1) & 0x7FFE) | ((*target >> 14) & 0x0001); - source++; - target++; +static inline void advanceStreamPosition(Sample *&stream, Bit32u posDelta) { + if (stream != NULL) { + stream += posDelta; } } @@ -146,6 +76,7 @@ Synth::Synth(ReportHandler *useReportHandler) { isOpen = false; reverbEnabled = true; reverbOverridden = false; + partialCount = DEFAULT_MAX_PARTIALS; if (useReportHandler == NULL) { reportHandler = new ReportHandler; @@ -155,28 +86,20 @@ Synth::Synth(ReportHandler *useReportHandler) { isDefaultReportHandler = false; } -#if MT32EMU_USE_REVERBMODEL == 1 - reverbModels[REVERB_MODE_ROOM] = new AReverbModel(REVERB_MODE_ROOM); - reverbModels[REVERB_MODE_HALL] = new AReverbModel(REVERB_MODE_HALL); - reverbModels[REVERB_MODE_PLATE] = new AReverbModel(REVERB_MODE_PLATE); - reverbModels[REVERB_MODE_TAP_DELAY] = new DelayReverb(); -#elif MT32EMU_USE_REVERBMODEL == 2 reverbModels[REVERB_MODE_ROOM] = new BReverbModel(REVERB_MODE_ROOM); reverbModels[REVERB_MODE_HALL] = new BReverbModel(REVERB_MODE_HALL); reverbModels[REVERB_MODE_PLATE] = new BReverbModel(REVERB_MODE_PLATE); reverbModels[REVERB_MODE_TAP_DELAY] = new BReverbModel(REVERB_MODE_TAP_DELAY); -#else - reverbModels[REVERB_MODE_ROOM] = new FreeverbModel(0.76f, 0.687770909f, 0.63f, 0, 0.5f); - reverbModels[REVERB_MODE_HALL] = new FreeverbModel(2.0f, 0.712025098f, 0.86f, 1, 0.5f); - reverbModels[REVERB_MODE_PLATE] = new FreeverbModel(0.4f, 0.939522749f, 0.38f, 2, 0.05f); - reverbModels[REVERB_MODE_TAP_DELAY] = new DelayReverb(); -#endif reverbModel = NULL; setDACInputMode(DACInputMode_NICE); + setMIDIDelayMode(MIDIDelayMode_DELAY_SHORT_MESSAGES_ONLY); setOutputGain(1.0f); - setReverbOutputGain(0.68f); + setReverbOutputGain(1.0f); + setReversedStereoEnabled(false); partialManager = NULL; + midiQueue = NULL; + lastReceivedMIDIEventTimestamp = 0; memset(parts, 0, sizeof(parts)); renderedSampleCount = 0; } @@ -197,29 +120,16 @@ void ReportHandler::showLCDMessage(const char *data) { } void ReportHandler::printDebug(const char *fmt, va_list list) { - vprintf(fmt, list); - printf("\n"); -} - -void Synth::partStateChanged(int partNum, bool isPartActive) { - reportHandler->onPartStateChanged(partNum, isPartActive); + vprintf(fmt, list); + printf("\n"); } void Synth::polyStateChanged(int partNum) { reportHandler->onPolyStateChanged(partNum); } -void Synth::partialStateChanged(const Partial * const partial, int oldPartialPhase, int newPartialPhase) { - for (int i = 0; i < MT32EMU_MAX_PARTIALS; i++) { - if (getPartial(i) == partial) { - reportHandler->onPartialStateChanged(i, oldPartialPhase, newPartialPhase); - break; - } - } -} - -void Synth::newTimbreSet(int partNum, char patchName[]) { - reportHandler->onProgramChanged(partNum, patchName); +void Synth::newTimbreSet(int partNum, Bit8u timbreGroup, const char patchName[]) { + reportHandler->onProgramChanged(partNum, timbreGroup, patchName); } void Synth::printDebug(const char *fmt, ...) { @@ -249,35 +159,72 @@ bool Synth::isReverbOverridden() const { } void Synth::setDACInputMode(DACInputMode mode) { - switch(mode) { - case DACInputMode_GENERATION1: - la32FloatToBit16sFunc = floatToBit16s_generation1; - reverbFloatToBit16sFunc = floatToBit16s_reverb; - break; - case DACInputMode_GENERATION2: - la32FloatToBit16sFunc = floatToBit16s_generation2; - reverbFloatToBit16sFunc = floatToBit16s_reverb; - break; - case DACInputMode_PURE: - la32FloatToBit16sFunc = floatToBit16s_pure; - reverbFloatToBit16sFunc = floatToBit16s_pure; - break; - case DACInputMode_NICE: - default: - la32FloatToBit16sFunc = floatToBit16s_nice; - reverbFloatToBit16sFunc = floatToBit16s_reverb; - break; - } + dacInputMode = mode; +} + +DACInputMode Synth::getDACInputMode() const { + return dacInputMode; +} + +void Synth::setMIDIDelayMode(MIDIDelayMode mode) { + midiDelayMode = mode; +} + +MIDIDelayMode Synth::getMIDIDelayMode() const { + return midiDelayMode; } +#if MT32EMU_USE_FLOAT_SAMPLES + void Synth::setOutputGain(float newOutputGain) { outputGain = newOutputGain; } +float Synth::getOutputGain() const { + return outputGain; +} + void Synth::setReverbOutputGain(float newReverbOutputGain) { reverbOutputGain = newReverbOutputGain; } +float Synth::getReverbOutputGain() const { + return reverbOutputGain; +} + +#else // #if MT32EMU_USE_FLOAT_SAMPLES + +void Synth::setOutputGain(float newOutputGain) { + if (newOutputGain < 0.0f) newOutputGain = -newOutputGain; + if (256.0f < newOutputGain) newOutputGain = 256.0f; + outputGain = int(newOutputGain * 256.0f); +} + +float Synth::getOutputGain() const { + return outputGain / 256.0f; +} + +void Synth::setReverbOutputGain(float newReverbOutputGain) { + if (newReverbOutputGain < 0.0f) newReverbOutputGain = -newReverbOutputGain; + float maxValue = 256.0f / CM32L_REVERB_TO_LA32_ANALOG_OUTPUT_GAIN_FACTOR; + if (maxValue < newReverbOutputGain) newReverbOutputGain = maxValue; + reverbOutputGain = int(newReverbOutputGain * 256.0f); +} + +float Synth::getReverbOutputGain() const { + return reverbOutputGain / 256.0f; +} + +#endif // #if MT32EMU_USE_FLOAT_SAMPLES + +void Synth::setReversedStereoEnabled(bool enabled) { + reversedStereoEnabled = enabled; +} + +bool Synth::isReversedStereoEnabled() { + return reversedStereoEnabled; +} + bool Synth::loadControlROM(const ROMImage &controlROMImage) { if (&controlROMImage == NULL) return false; Common::File *file = controlROMImage.getFile(); @@ -356,9 +303,9 @@ bool Synth::loadPCMROM(const ROMImage &pcmROMImage) { bool Synth::initPCMList(Bit16u mapAddress, Bit16u count) { ControlROMPCMStruct *tps = (ControlROMPCMStruct *)&controlROMData[mapAddress]; for (int i = 0; i < count; i++) { - size_t rAddr = tps[i].pos * 0x800; - size_t rLenExp = (tps[i].len & 0x70) >> 4; - size_t rLen = 0x800 << rLenExp; + Bit32u rAddr = tps[i].pos * 0x800; + Bit32u rLenExp = (tps[i].len & 0x70) >> 4; + Bit32u rLen = 0x800 << rLenExp; if (rAddr + rLen > pcmROMSize) { printDebug("Control ROM error: Wave map entry %d points to invalid PCM address 0x%04X, length 0x%04X", i, rAddr, rLen); return false; @@ -420,17 +367,18 @@ bool Synth::initTimbres(Bit16u mapAddress, Bit16u offset, int count, int startTi return true; } -bool Synth::open(const ROMImage &controlROMImage, const ROMImage &pcmROMImage) { +bool Synth::open(const ROMImage &controlROMImage, const ROMImage &pcmROMImage, unsigned int usePartialCount) { if (isOpen) { return false; } - prerenderReadIx = prerenderWriteIx = 0; + partialCount = usePartialCount; + abortingPoly = NULL; #if MT32EMU_MONITOR_INIT printDebug("Initialising Constant Tables"); #endif #if !MT32EMU_REDUCE_REVERB_MEMORY - for (int i = 0; i < 4; i++) { - reverbModels[i]->open(useProp.sampleRate); + for (int i = REVERB_MODE_ROOM; i <= REVERB_MODE_TAP_DELAY; i++) { + reverbModels[i]->open(); } #endif @@ -567,6 +515,8 @@ bool Synth::open(const ROMImage &controlROMImage, const ROMImage &pcmROMImage) { // For resetting mt32 mid-execution mt32default = mt32ram; + midiQueue = new MidiEventQueue(); + isOpen = true; isEnabled = false; @@ -581,6 +531,9 @@ void Synth::close() { return; } + delete midiQueue; + midiQueue = NULL; + delete partialManager; partialManager = NULL; @@ -601,12 +554,78 @@ void Synth::close() { isOpen = false; } -void Synth::playMsg(Bit32u msg) { +void Synth::flushMIDIQueue() { + if (midiQueue != NULL) { + for (;;) { + const MidiEvent *midiEvent = midiQueue->peekMidiEvent(); + if (midiEvent == NULL) break; + if (midiEvent->sysexData == NULL) { + playMsgNow(midiEvent->shortMessageData); + } else { + playSysexNow(midiEvent->sysexData, midiEvent->sysexLength); + } + midiQueue->dropMidiEvent(); + } + lastReceivedMIDIEventTimestamp = renderedSampleCount; + } +} + +void Synth::setMIDIEventQueueSize(Bit32u useSize) { + if (midiQueue != NULL) { + flushMIDIQueue(); + delete midiQueue; + midiQueue = new MidiEventQueue(useSize); + } +} + +Bit32u Synth::getShortMessageLength(Bit32u msg) { + if ((msg & 0xF0) == 0xF0) return 1; + // NOTE: This calculation isn't quite correct + // as it doesn't consider the running status byte + return ((msg & 0xE0) == 0xC0) ? 2 : 3; +} + +Bit32u Synth::addMIDIInterfaceDelay(Bit32u len, Bit32u timestamp) { + Bit32u transferTime = Bit32u((double)len * MIDI_DATA_TRANSFER_RATE); + // Dealing with wrapping + if (Bit32s(timestamp - lastReceivedMIDIEventTimestamp) < 0) { + timestamp = lastReceivedMIDIEventTimestamp; + } + timestamp += transferTime; + lastReceivedMIDIEventTimestamp = timestamp; + return timestamp; +} + +bool Synth::playMsg(Bit32u msg) { + return playMsg(msg, renderedSampleCount); +} + +bool Synth::playMsg(Bit32u msg, Bit32u timestamp) { + if (midiQueue == NULL) return false; + if (midiDelayMode != MIDIDelayMode_IMMEDIATE) { + timestamp = addMIDIInterfaceDelay(getShortMessageLength(msg), timestamp); + } + return midiQueue->pushShortMessage(msg, timestamp); +} + +bool Synth::playSysex(const Bit8u *sysex, Bit32u len) { + return playSysex(sysex, len, renderedSampleCount); +} + +bool Synth::playSysex(const Bit8u *sysex, Bit32u len, Bit32u timestamp) { + if (midiQueue == NULL) return false; + if (midiDelayMode == MIDIDelayMode_DELAY_ALL) { + timestamp = addMIDIInterfaceDelay(len, timestamp); + } + return midiQueue->pushSysex(sysex, len, timestamp); +} + +void Synth::playMsgNow(Bit32u msg) { // FIXME: Implement active sensing unsigned char code = (unsigned char)((msg & 0x0000F0) >> 4); unsigned char chan = (unsigned char)(msg & 0x00000F); - unsigned char note = (unsigned char)((msg & 0x00FF00) >> 8); - unsigned char velocity = (unsigned char)((msg & 0xFF0000) >> 16); + unsigned char note = (unsigned char)((msg & 0x007F00) >> 8); + unsigned char velocity = (unsigned char)((msg & 0x7F0000) >> 16); isEnabled = true; //printDebug("Playing chan %d, code 0x%01x note: 0x%02x", chan, code, note); @@ -619,11 +638,6 @@ void Synth::playMsg(Bit32u msg) { return; } playMsgOnPart(part, code, note, velocity); - - // This ensures minimum 1-sample delay between sequential MIDI events - // Without this, a sequence of NoteOn and immediately succeeding NoteOff messages is always silent - // Technically, it's also impossible to send events through the MIDI interface faster than about each millisecond - prerender(); } void Synth::playMsgOnPart(unsigned char part, unsigned char code, unsigned char note, unsigned char velocity) { @@ -705,7 +719,7 @@ void Synth::playMsgOnPart(unsigned char part, unsigned char code, unsigned char #if MT32EMU_MONITOR_MIDI > 0 printDebug("Unknown MIDI Control code: 0x%02x - vel 0x%02x", note, velocity); #endif - break; + return; } break; @@ -722,13 +736,12 @@ void Synth::playMsgOnPart(unsigned char part, unsigned char code, unsigned char #if MT32EMU_MONITOR_MIDI > 0 printDebug("Unknown Midi code: 0x%01x - %02x - %02x", code, note, velocity); #endif - break; + return; } - - //midiOutShortMsg(m_out, msg); + reportHandler->onMIDIMessagePlayed(); } -void Synth::playSysex(const Bit8u *sysex, Bit32u len) { +void Synth::playSysexNow(const Bit8u *sysex, Bit32u len) { if (len < 2) { printDebug("playSysex: Message is too short for sysex (%d bytes)", len); } @@ -823,6 +836,7 @@ void Synth::readSysex(unsigned char /*device*/, const Bit8u * /*sysex*/, Bit32u } void Synth::writeSysex(unsigned char device, const Bit8u *sysex, Bit32u len) { + reportHandler->onMIDIMessagePlayed(); Bit32u addr = (sysex[0] << 16) | (sysex[1] << 8) | (sysex[2]); addr = MT32EMU_MEMADDR(addr); sysex += 3; @@ -1245,7 +1259,7 @@ void Synth::refreshSystemReverbParameters() { reportHandler->onNewReverbTime(mt32ram.system.reverbTime); reportHandler->onNewReverbLevel(mt32ram.system.reverbLevel); - ReverbModel *newReverbModel = reverbModels[mt32ram.system.reverbMode]; + BReverbModel *newReverbModel = reverbModels[mt32ram.system.reverbMode]; #if MT32EMU_REDUCE_REVERB_MEMORY if (reverbModel != newReverbModel) { if (reverbModel != NULL) { @@ -1321,179 +1335,229 @@ void Synth::reset() { isEnabled = false; } -void Synth::render(Bit16s *stream, Bit32u len) { - if (!isEnabled) { - memset(stream, 0, len * sizeof(Bit16s) * 2); - return; +MidiEvent::~MidiEvent() { + if (sysexData != NULL) { + delete[] sysexData; } - while (len > 0) { - Bit32u thisLen = len > MAX_SAMPLES_PER_RUN ? MAX_SAMPLES_PER_RUN : len; - renderStreams(tmpNonReverbLeft, tmpNonReverbRight, tmpReverbDryLeft, tmpReverbDryRight, tmpReverbWetLeft, tmpReverbWetRight, thisLen); - for (Bit32u i = 0; i < thisLen; i++) { - stream[0] = clipBit16s((Bit32s)tmpNonReverbLeft[i] + (Bit32s)tmpReverbDryLeft[i] + (Bit32s)tmpReverbWetLeft[i]); - stream[1] = clipBit16s((Bit32s)tmpNonReverbRight[i] + (Bit32s)tmpReverbDryRight[i] + (Bit32s)tmpReverbWetRight[i]); - stream += 2; - } - len -= thisLen; +} + +void MidiEvent::setShortMessage(Bit32u useShortMessageData, Bit32u useTimestamp) { + if (sysexData != NULL) { + delete[] sysexData; } + shortMessageData = useShortMessageData; + timestamp = useTimestamp; + sysexData = NULL; + sysexLength = 0; } -bool Synth::prerender() { - int newPrerenderWriteIx = (prerenderWriteIx + 1) % MAX_PRERENDER_SAMPLES; - if (newPrerenderWriteIx == prerenderReadIx) { - // The prerender buffer is full - return false; +void MidiEvent::setSysex(const Bit8u *useSysexData, Bit32u useSysexLength, Bit32u useTimestamp) { + if (sysexData != NULL) { + delete[] sysexData; } - doRenderStreams( - prerenderNonReverbLeft + prerenderWriteIx, - prerenderNonReverbRight + prerenderWriteIx, - prerenderReverbDryLeft + prerenderWriteIx, - prerenderReverbDryRight + prerenderWriteIx, - prerenderReverbWetLeft + prerenderWriteIx, - prerenderReverbWetRight + prerenderWriteIx, - 1); - prerenderWriteIx = newPrerenderWriteIx; + shortMessageData = 0; + timestamp = useTimestamp; + sysexLength = useSysexLength; + Bit8u *dstSysexData = new Bit8u[sysexLength]; + sysexData = dstSysexData; + memcpy(dstSysexData, useSysexData, sysexLength); +} + +MidiEventQueue::MidiEventQueue(Bit32u useRingBufferSize) : ringBufferSize(useRingBufferSize) { + ringBuffer = new MidiEvent[ringBufferSize]; + memset(ringBuffer, 0, ringBufferSize * sizeof(MidiEvent)); + reset(); +} + +MidiEventQueue::~MidiEventQueue() { + delete[] ringBuffer; +} + +void MidiEventQueue::reset() { + startPosition = 0; + endPosition = 0; +} + +bool MidiEventQueue::pushShortMessage(Bit32u shortMessageData, Bit32u timestamp) { + unsigned int newEndPosition = (endPosition + 1) % ringBufferSize; + // Is ring buffer full? + if (startPosition == newEndPosition) return false; + ringBuffer[endPosition].setShortMessage(shortMessageData, timestamp); + endPosition = newEndPosition; return true; } -static inline void maybeCopy(Bit16s *out, Bit32u outPos, Bit16s *in, Bit32u inPos, Bit32u len) { - if (out == NULL) { - return; - } - memcpy(out + outPos, in + inPos, len * sizeof(Bit16s)); +bool MidiEventQueue::pushSysex(const Bit8u *sysexData, Bit32u sysexLength, Bit32u timestamp) { + unsigned int newEndPosition = (endPosition + 1) % ringBufferSize; + // Is ring buffer full? + if (startPosition == newEndPosition) return false; + ringBuffer[endPosition].setSysex(sysexData, sysexLength, timestamp); + endPosition = newEndPosition; + return true; } -void Synth::copyPrerender(Bit16s *nonReverbLeft, Bit16s *nonReverbRight, Bit16s *reverbDryLeft, Bit16s *reverbDryRight, Bit16s *reverbWetLeft, Bit16s *reverbWetRight, Bit32u pos, Bit32u len) { - maybeCopy(nonReverbLeft, pos, prerenderNonReverbLeft, prerenderReadIx, len); - maybeCopy(nonReverbRight, pos, prerenderNonReverbRight, prerenderReadIx, len); - maybeCopy(reverbDryLeft, pos, prerenderReverbDryLeft, prerenderReadIx, len); - maybeCopy(reverbDryRight, pos, prerenderReverbDryRight, prerenderReadIx, len); - maybeCopy(reverbWetLeft, pos, prerenderReverbWetLeft, prerenderReadIx, len); - maybeCopy(reverbWetRight, pos, prerenderReverbWetRight, prerenderReadIx, len); +const MidiEvent *MidiEventQueue::peekMidiEvent() { + return (startPosition == endPosition) ? NULL : &ringBuffer[startPosition]; } -void Synth::checkPrerender(Bit16s *nonReverbLeft, Bit16s *nonReverbRight, Bit16s *reverbDryLeft, Bit16s *reverbDryRight, Bit16s *reverbWetLeft, Bit16s *reverbWetRight, Bit32u &pos, Bit32u &len) { - if (prerenderReadIx > prerenderWriteIx) { - // There's data in the prerender buffer, and the write index has wrapped. - Bit32u prerenderCopyLen = MAX_PRERENDER_SAMPLES - prerenderReadIx; - if (prerenderCopyLen > len) { - prerenderCopyLen = len; - } - copyPrerender(nonReverbLeft, nonReverbRight, reverbDryLeft, reverbDryRight, reverbWetLeft, reverbWetRight, pos, prerenderCopyLen); - len -= prerenderCopyLen; - pos += prerenderCopyLen; - prerenderReadIx = (prerenderReadIx + prerenderCopyLen) % MAX_PRERENDER_SAMPLES; - } - if (prerenderReadIx < prerenderWriteIx) { - // There's data in the prerender buffer, and the write index is ahead of the read index. - Bit32u prerenderCopyLen = prerenderWriteIx - prerenderReadIx; - if (prerenderCopyLen > len) { - prerenderCopyLen = len; - } - copyPrerender(nonReverbLeft, nonReverbRight, reverbDryLeft, reverbDryRight, reverbWetLeft, reverbWetRight, pos, prerenderCopyLen); - len -= prerenderCopyLen; - pos += prerenderCopyLen; - prerenderReadIx += prerenderCopyLen; - } - if (prerenderReadIx == prerenderWriteIx) { - // If the ring buffer's empty, reset it to start at 0 to minimise wrapping, - // which requires two writes instead of one. - prerenderReadIx = prerenderWriteIx = 0; - } -} - -void Synth::renderStreams(Bit16s *nonReverbLeft, Bit16s *nonReverbRight, Bit16s *reverbDryLeft, Bit16s *reverbDryRight, Bit16s *reverbWetLeft, Bit16s *reverbWetRight, Bit32u len) { - if (!isEnabled) { - clearIfNonNull(nonReverbLeft, len); - clearIfNonNull(nonReverbRight, len); - clearIfNonNull(reverbDryLeft, len); - clearIfNonNull(reverbDryRight, len); - clearIfNonNull(reverbWetLeft, len); - clearIfNonNull(reverbWetRight, len); - return; +void MidiEventQueue::dropMidiEvent() { + // Is ring buffer empty? + if (startPosition != endPosition) { + startPosition = (startPosition + 1) % ringBufferSize; } - Bit32u pos = 0; +} - // First, check for data in the prerender buffer and spit that out before generating anything new. - // Note that the prerender buffer is rarely used - see comments elsewhere for details. - checkPrerender(nonReverbLeft, nonReverbRight, reverbDryLeft, reverbDryRight, reverbWetLeft, reverbWetRight, pos, len); +void Synth::render(Sample *stream, Bit32u len) { + Sample tmpNonReverbLeft[MAX_SAMPLES_PER_RUN]; + Sample tmpNonReverbRight[MAX_SAMPLES_PER_RUN]; + Sample tmpReverbDryLeft[MAX_SAMPLES_PER_RUN]; + Sample tmpReverbDryRight[MAX_SAMPLES_PER_RUN]; + Sample tmpReverbWetLeft[MAX_SAMPLES_PER_RUN]; + Sample tmpReverbWetRight[MAX_SAMPLES_PER_RUN]; while (len > 0) { Bit32u thisLen = len > MAX_SAMPLES_PER_RUN ? MAX_SAMPLES_PER_RUN : len; - doRenderStreams( - streamOffset(nonReverbLeft, pos), - streamOffset(nonReverbRight, pos), - streamOffset(reverbDryLeft, pos), - streamOffset(reverbDryRight, pos), - streamOffset(reverbWetLeft, pos), - streamOffset(reverbWetRight, pos), - thisLen); + renderStreams(tmpNonReverbLeft, tmpNonReverbRight, tmpReverbDryLeft, tmpReverbDryRight, tmpReverbWetLeft, tmpReverbWetRight, thisLen); + for (Bit32u i = 0; i < thisLen; i++) { +#if MT32EMU_USE_FLOAT_SAMPLES + *(stream++) = tmpNonReverbLeft[i] + tmpReverbDryLeft[i] + tmpReverbWetLeft[i]; + *(stream++) = tmpNonReverbRight[i] + tmpReverbDryRight[i] + tmpReverbWetRight[i]; +#else + *(stream++) = clipBit16s((Bit32s)tmpNonReverbLeft[i] + (Bit32s)tmpReverbDryLeft[i] + (Bit32s)tmpReverbWetLeft[i]); + *(stream++) = clipBit16s((Bit32s)tmpNonReverbRight[i] + (Bit32s)tmpReverbDryRight[i] + (Bit32s)tmpReverbWetRight[i]); +#endif + } len -= thisLen; - pos += thisLen; } } -// FIXME: Using more temporary buffers than we need to -void Synth::doRenderStreams(Bit16s *nonReverbLeft, Bit16s *nonReverbRight, Bit16s *reverbDryLeft, Bit16s *reverbDryRight, Bit16s *reverbWetLeft, Bit16s *reverbWetRight, Bit32u len) { - clearFloats(&tmpBufMixLeft[0], &tmpBufMixRight[0], len); - if (!reverbEnabled) { - for (unsigned int i = 0; i < MT32EMU_MAX_PARTIALS; i++) { - if (partialManager->produceOutput(i, &tmpBufPartialLeft[0], &tmpBufPartialRight[0], len)) { - mix(&tmpBufMixLeft[0], &tmpBufPartialLeft[0], len); - mix(&tmpBufMixRight[0], &tmpBufPartialRight[0], len); +void Synth::renderStreams(Sample *nonReverbLeft, Sample *nonReverbRight, Sample *reverbDryLeft, Sample *reverbDryRight, Sample *reverbWetLeft, Sample *reverbWetRight, Bit32u len) { + while (len > 0) { + // We need to ensure zero-duration notes will play so add minimum 1-sample delay. + Bit32u thisLen = 1; + if (!isAbortingPoly()) { + const MidiEvent *nextEvent = midiQueue->peekMidiEvent(); + Bit32s samplesToNextEvent = (nextEvent != NULL) ? Bit32s(nextEvent->timestamp - renderedSampleCount) : MAX_SAMPLES_PER_RUN; + if (samplesToNextEvent > 0) { + thisLen = len > MAX_SAMPLES_PER_RUN ? MAX_SAMPLES_PER_RUN : len; + if (thisLen > (Bit32u)samplesToNextEvent) { + thisLen = samplesToNextEvent; + } + } else { + if (nextEvent->sysexData == NULL) { + playMsgNow(nextEvent->shortMessageData); + // If a poly is aborting we don't drop the event from the queue. + // Instead, we'll return to it again when the abortion is done. + if (!isAbortingPoly()) { + midiQueue->dropMidiEvent(); + } + } else { + playSysexNow(nextEvent->sysexData, nextEvent->sysexLength); + midiQueue->dropMidiEvent(); + } } } - if (nonReverbLeft != NULL) { - la32FloatToBit16sFunc(nonReverbLeft, &tmpBufMixLeft[0], len, outputGain); - } - if (nonReverbRight != NULL) { - la32FloatToBit16sFunc(nonReverbRight, &tmpBufMixRight[0], len, outputGain); - } - clearIfNonNull(reverbDryLeft, len); - clearIfNonNull(reverbDryRight, len); - clearIfNonNull(reverbWetLeft, len); - clearIfNonNull(reverbWetRight, len); + doRenderStreams(nonReverbLeft, nonReverbRight, reverbDryLeft, reverbDryRight, reverbWetLeft, reverbWetRight, thisLen); + advanceStreamPosition(nonReverbLeft, thisLen); + advanceStreamPosition(nonReverbRight, thisLen); + advanceStreamPosition(reverbDryLeft, thisLen); + advanceStreamPosition(reverbDryRight, thisLen); + advanceStreamPosition(reverbWetLeft, thisLen); + advanceStreamPosition(reverbWetRight, thisLen); + len -= thisLen; + } +} + +void Synth::convertSamplesToOutput(Sample *target, const Sample *source, Bit32u len, bool reverb) { + if (target == NULL) return; + + if (dacInputMode == DACInputMode_PURE) { + memcpy(target, source, len * sizeof(Sample)); + return; + } + +#if MT32EMU_USE_FLOAT_SAMPLES + float gain = reverb ? reverbOutputGain * CM32L_REVERB_TO_LA32_ANALOG_OUTPUT_GAIN_FACTOR : 2.0f * outputGain; + while (len--) { + *(target++) = *(source++) * gain; + } +#else + int gain; + if (reverb) { + gain = int(reverbOutputGain * CM32L_REVERB_TO_LA32_ANALOG_OUTPUT_GAIN_FACTOR); } else { - for (unsigned int i = 0; i < MT32EMU_MAX_PARTIALS; i++) { - if (!partialManager->shouldReverb(i)) { - if (partialManager->produceOutput(i, &tmpBufPartialLeft[0], &tmpBufPartialRight[0], len)) { - mix(&tmpBufMixLeft[0], &tmpBufPartialLeft[0], len); - mix(&tmpBufMixRight[0], &tmpBufPartialRight[0], len); - } + gain = outputGain; + switch (dacInputMode) { + case DACInputMode_NICE: + // Since we're not shooting for accuracy here, don't worry about the rounding mode. + gain <<= 1; + break; + case DACInputMode_GENERATION1: + while (len--) { + *target = clipBit16s(Bit32s((*source * gain) >> 8)); + *target = (*target & 0x8000) | ((*target << 1) & 0x7FFE); + source++; + target++; } + return; + case DACInputMode_GENERATION2: + while (len--) { + *target = clipBit16s(Bit32s((*source * gain) >> 8)); + *target = (*target & 0x8000) | ((*target << 1) & 0x7FFE) | ((*target >> 14) & 0x0001); + source++; + target++; + } + return; + default: + break; } - if (nonReverbLeft != NULL) { - la32FloatToBit16sFunc(nonReverbLeft, &tmpBufMixLeft[0], len, outputGain); - } - if (nonReverbRight != NULL) { - la32FloatToBit16sFunc(nonReverbRight, &tmpBufMixRight[0], len, outputGain); + } + while (len--) { + *(target++) = clipBit16s(Bit32s((*(source++) * gain) >> 8)); + } +#endif +} + +void Synth::doRenderStreams(Sample *nonReverbLeft, Sample *nonReverbRight, Sample *reverbDryLeft, Sample *reverbDryRight, Sample *reverbWetLeft, Sample *reverbWetRight, Bit32u len) { + if (isEnabled) { + Sample tmpBufMixLeft[MAX_SAMPLES_PER_RUN], tmpBufMixRight[MAX_SAMPLES_PER_RUN]; + muteStream(tmpBufMixLeft, len); + muteStream(tmpBufMixRight, len); + for (unsigned int i = 0; i < getPartialCount(); i++) { + if (!reverbEnabled || !partialManager->shouldReverb(i)) { + partialManager->produceOutput(i, tmpBufMixLeft, tmpBufMixRight, len); + } } + convertSamplesToOutput(nonReverbLeft, tmpBufMixLeft, len, false); + convertSamplesToOutput(nonReverbRight, tmpBufMixRight, len, false); + } else { + muteStream(nonReverbLeft, len); + muteStream(nonReverbRight, len); + } - clearFloats(&tmpBufMixLeft[0], &tmpBufMixRight[0], len); - for (unsigned int i = 0; i < MT32EMU_MAX_PARTIALS; i++) { + if (isEnabled && reverbEnabled) { + Sample tmpBufMixLeft[MAX_SAMPLES_PER_RUN], tmpBufMixRight[MAX_SAMPLES_PER_RUN]; + muteStream(tmpBufMixLeft, len); + muteStream(tmpBufMixRight, len); + for (unsigned int i = 0; i < getPartialCount(); i++) { if (partialManager->shouldReverb(i)) { - if (partialManager->produceOutput(i, &tmpBufPartialLeft[0], &tmpBufPartialRight[0], len)) { - mix(&tmpBufMixLeft[0], &tmpBufPartialLeft[0], len); - mix(&tmpBufMixRight[0], &tmpBufPartialRight[0], len); - } + partialManager->produceOutput(i, tmpBufMixLeft, tmpBufMixRight, len); } } - if (reverbDryLeft != NULL) { - la32FloatToBit16sFunc(reverbDryLeft, &tmpBufMixLeft[0], len, outputGain); - } - if (reverbDryRight != NULL) { - la32FloatToBit16sFunc(reverbDryRight, &tmpBufMixRight[0], len, outputGain); - } + convertSamplesToOutput(reverbDryLeft, tmpBufMixLeft, len, false); + convertSamplesToOutput(reverbDryRight, tmpBufMixRight, len, false); - // FIXME: Note that on the real devices, reverb input and output are signed linear 16-bit (well, kinda, there's some fudging) PCM, not float. - reverbModel->process(&tmpBufMixLeft[0], &tmpBufMixRight[0], &tmpBufReverbOutLeft[0], &tmpBufReverbOutRight[0], len); - if (reverbWetLeft != NULL) { - reverbFloatToBit16sFunc(reverbWetLeft, &tmpBufReverbOutLeft[0], len, reverbOutputGain); - } - if (reverbWetRight != NULL) { - reverbFloatToBit16sFunc(reverbWetRight, &tmpBufReverbOutRight[0], len, reverbOutputGain); - } + Sample tmpBufReverbOutLeft[MAX_SAMPLES_PER_RUN], tmpBufReverbOutRight[MAX_SAMPLES_PER_RUN]; + reverbModel->process(tmpBufMixLeft, tmpBufMixRight, tmpBufReverbOutLeft, tmpBufReverbOutRight, len); + convertSamplesToOutput(reverbWetLeft, tmpBufReverbOutLeft, len, true); + convertSamplesToOutput(reverbWetRight, tmpBufReverbOutRight, len, true); + } else { + muteStream(reverbDryLeft, len); + muteStream(reverbDryRight, len); + muteStream(reverbWetLeft, len); + muteStream(reverbWetRight, len); } + partialManager->clearAlreadyOutputed(); renderedSampleCount += len; } @@ -1502,19 +1566,14 @@ void Synth::printPartialUsage(unsigned long sampleOffset) { unsigned int partialUsage[9]; partialManager->getPerPartPartialUsage(partialUsage); if (sampleOffset > 0) { - printDebug("[+%lu] Partial Usage: 1:%02d 2:%02d 3:%02d 4:%02d 5:%02d 6:%02d 7:%02d 8:%02d R: %02d TOTAL: %02d", sampleOffset, partialUsage[0], partialUsage[1], partialUsage[2], partialUsage[3], partialUsage[4], partialUsage[5], partialUsage[6], partialUsage[7], partialUsage[8], MT32EMU_MAX_PARTIALS - partialManager->getFreePartialCount()); + printDebug("[+%lu] Partial Usage: 1:%02d 2:%02d 3:%02d 4:%02d 5:%02d 6:%02d 7:%02d 8:%02d R: %02d TOTAL: %02d", sampleOffset, partialUsage[0], partialUsage[1], partialUsage[2], partialUsage[3], partialUsage[4], partialUsage[5], partialUsage[6], partialUsage[7], partialUsage[8], getPartialCount() - partialManager->getFreePartialCount()); } else { - printDebug("Partial Usage: 1:%02d 2:%02d 3:%02d 4:%02d 5:%02d 6:%02d 7:%02d 8:%02d R: %02d TOTAL: %02d", partialUsage[0], partialUsage[1], partialUsage[2], partialUsage[3], partialUsage[4], partialUsage[5], partialUsage[6], partialUsage[7], partialUsage[8], MT32EMU_MAX_PARTIALS - partialManager->getFreePartialCount()); + printDebug("Partial Usage: 1:%02d 2:%02d 3:%02d 4:%02d 5:%02d 6:%02d 7:%02d 8:%02d R: %02d TOTAL: %02d", partialUsage[0], partialUsage[1], partialUsage[2], partialUsage[3], partialUsage[4], partialUsage[5], partialUsage[6], partialUsage[7], partialUsage[8], getPartialCount() - partialManager->getFreePartialCount()); } } bool Synth::hasActivePartials() const { - if (prerenderReadIx != prerenderWriteIx) { - // Data in the prerender buffer means that the current isActive() states are "in the future". - // It also means that partials are definitely active at this render point. - return true; - } - for (int partialNum = 0; partialNum < MT32EMU_MAX_PARTIALS; partialNum++) { + for (unsigned int partialNum = 0; partialNum < getPartialCount(); partialNum++) { if (partialManager->getPartial(partialNum)->isActive()) { return true; } @@ -1522,6 +1581,10 @@ bool Synth::hasActivePartials() const { return false; } +bool Synth::isAbortingPoly() const { + return abortingPoly != NULL; +} + bool Synth::isActive() const { if (hasActivePartials()) { return true; @@ -1536,6 +1599,10 @@ const Partial *Synth::getPartial(unsigned int partialNum) const { return partialManager->getPartial(partialNum); } +unsigned int Synth::getPartialCount() const { + return partialCount; +} + const Part *Synth::getPart(unsigned int partNum) const { if (partNum > 8) { return NULL; |