/*==================================================================== * seqplayer.c * * Copyright 1993, Silicon Graphics, Inc. * All Rights Reserved. * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, * Inc.; the contents of this file may not be disclosed to third * parties, copied or duplicated in any form, in whole or in part, * without the prior written permission of Silicon Graphics, Inc. * RESTRICTED RIGHTS LEGEND: * Use, duplication or disclosure by the Government is subject to * restrictions as set forth in subdivision (c)(1)(ii) of the Rights * in Technical Data and Computer Software clause at DFARS * 252.227-7013, and/or in similar or successor clauses in the FAR, * DOD or NASA FAR Supplement. Unpublished - rights reserved under the * Copyright Laws of the United States. *====================================================================*/ /* * Notes: * * Controller Numbers: * 1 Modulation * 7 Volume * 10 Pan * 11 Expression * 64 Sustain * 121 Reset All Controllers * 123 All Notes Off * * Registered Parameters * 0 Pitch Bend Sensitivity * 1 Fine Tuning * 2 Coarse Tuning */ #include #include #include #include #include "seqp.h" #include "seq.h" // TODO: this comes from a header #ident "$Revision: 1.17 $" static ALMicroTime __seqpVoiceHandler(void *node); static void __handleMIDIMsg(ALSeqPlayer *seqp, ALEvent *event); static void __handleMetaMsg(ALSeqPlayer *seqp, ALEvent *event); static void __handleNextSeqEvent(ALSeqPlayer *seqp); static void __setUsptFromTempo(ALSeqPlayer *seqp, f32 tempo); /* sct 1/8/96 */ /* * Sequence Player public functions */ void alSeqpNew(ALSeqPlayer *seqp, ALSeqpConfig *c) { s32 i; ALEventListItem *items; ALVoiceState *vs; ALVoiceState *voices; ALHeap *hp = c->heap; /* * initialize member variables */ seqp->bank = 0; seqp->target = NULL; seqp->drvr = &alGlobals->drvr; seqp->chanMask = 0xff; seqp->uspt = 488; seqp->nextDelta = 0; seqp->state = AL_STOPPED; seqp->vol = 0x7FFF; /* full volume */ seqp->debugFlags = c->debugFlags; seqp->frameTime = AL_USEC_PER_FRAME; /* should get this from driver */ seqp->curTime = 0; seqp->initOsc = c->initOsc; seqp->updateOsc = c->updateOsc; seqp->stopOsc = c->stopOsc; seqp->loopStart = 0; seqp->loopEnd = 0; seqp->loopCount = 0; /* -1 = loop forever, 0 = no loop */ seqp->nextEvent.type = AL_SEQP_API_EVT; /* start the voice handler "spinning" */ /* * init the channel state */ seqp->maxChannels = c->maxChannels; seqp->chanState = alHeapAlloc(hp, c->maxChannels, sizeof(ALChanState) ); __initChanState(seqp); /* sct 11/6/95 */ /* * init the voice state array */ voices = alHeapAlloc(hp, c->maxVoices, sizeof(ALVoiceState)); seqp->vFreeList = 0; for (i = 0; i < c->maxVoices; i++) { vs = &voices[i]; vs->next = seqp->vFreeList; seqp->vFreeList = vs; } seqp->vAllocHead = 0; seqp->vAllocTail = 0; /* * init the event queue */ items = alHeapAlloc(hp, c->maxEvents, sizeof(ALEventListItem)); alEvtqNew(&seqp->evtq, items, c->maxEvents); /* * add ourselves to the driver */ seqp->node.next = NULL; seqp->node.handler = __seqpVoiceHandler; seqp->node.clientData = seqp; alSynAddPlayer(&alGlobals->drvr, &seqp->node); } /************************************************************* * private routines or driver callback routines *************************************************************/ ALMicroTime __seqpVoiceHandler(void *node) { ALSeqPlayer *seqp = (ALSeqPlayer *) node; ALEvent evt; ALVoice *voice; ALMicroTime delta; ALVoiceState *vs; void *oscState; f32 oscValue; u8 chan; do { switch (seqp->nextEvent.type) { case (AL_SEQ_REF_EVT): __handleNextSeqEvent(seqp); break; case (AL_SEQP_API_EVT): evt.type = AL_SEQP_API_EVT; alEvtqPostEvent(&seqp->evtq, (ALEvent *)&evt, seqp->frameTime); break; case (AL_NOTE_END_EVT): voice = seqp->nextEvent.msg.note.voice; alSynStopVoice(seqp->drvr, voice); alSynFreeVoice(seqp->drvr, voice); vs = (ALVoiceState *)voice->clientPrivate; if(vs->flags) __seqpStopOsc((ALSeqPlayer*)seqp,vs); __unmapVoice(seqp, voice); break; case (AL_SEQP_ENV_EVT): voice = seqp->nextEvent.msg.vol.voice; vs = (ALVoiceState *)voice->clientPrivate; if (vs->envPhase == AL_PHASE_ATTACK) vs->envPhase = AL_PHASE_DECAY; delta = seqp->nextEvent.msg.vol.delta; vs->envGain = seqp->nextEvent.msg.vol.vol; vs->envEndTime = seqp->curTime + delta; alSynSetVol(seqp->drvr, voice, __vsVol(vs, seqp), delta); break; case (AL_TREM_OSC_EVT): vs = seqp->nextEvent.msg.osc.vs; oscState = seqp->nextEvent.msg.osc.oscState; delta = (*seqp->updateOsc)(oscState,&oscValue); vs->tremelo = (u8)oscValue; alSynSetVol(seqp->drvr, &vs->voice, __vsVol(vs,seqp), __vsDelta(vs,seqp->curTime)); evt.type = AL_TREM_OSC_EVT; evt.msg.osc.vs = vs; evt.msg.osc.oscState = oscState; alEvtqPostEvent(&seqp->evtq, &evt, delta); break; case (AL_VIB_OSC_EVT): vs = seqp->nextEvent.msg.osc.vs; oscState = seqp->nextEvent.msg.osc.oscState; chan = seqp->nextEvent.msg.osc.chan; delta = (*seqp->updateOsc)(oscState,&oscValue); vs->vibrato = oscValue; alSynSetPitch(seqp->drvr, &vs->voice, vs->pitch * vs->vibrato * seqp->chanState[chan].pitchBend); evt.type = AL_VIB_OSC_EVT; evt.msg.osc.vs = vs; evt.msg.osc.oscState = oscState; evt.msg.osc.chan = chan; alEvtqPostEvent(&seqp->evtq, &evt, delta); break; case (AL_SEQP_MIDI_EVT): __handleMIDIMsg(seqp, &seqp->nextEvent); break; case (AL_SEQP_META_EVT): __handleMetaMsg(seqp, &seqp->nextEvent); break; case (AL_SEQP_PLAY_EVT): if (seqp->state != AL_PLAYING) { seqp->state = AL_PLAYING; __postNextSeqEvent(seqp); /* seqp must be AL_PLAYING before we call this routine. */ } break; case (AL_SEQP_STOP_EVT): if ( seqp->state == AL_STOPPING ) { for (vs = seqp->vAllocHead; vs != 0; vs = seqp->vAllocHead) { alSynStopVoice(seqp->drvr, &vs->voice); alSynFreeVoice(seqp->drvr, &vs->voice); if(vs->flags) __seqpStopOsc((ALSeqPlayer*)seqp,vs); __unmapVoice((ALSeqPlayer*)seqp, &vs->voice); } seqp->curTime = 0; seqp->state = AL_STOPPED; /* alEvtqFlush(&seqp->evtq); - Don't flush event queue anymore. */ /* sct 1/3/96 - Don't overwrite nextEvent with AL_SEQP_API_EVT or set nextDelta to AL_USEC_PER_FRAME since we're not stopping event processing. */ /* sct 1/3/96 - Don't return here since we keep processing events as usual. */ } break; case (AL_SEQP_STOPPING_EVT): if (seqp->state == AL_PLAYING) { /* * sct 12/29/95 - Remove events associated with the * stopping sequence. Note that flushing * AL_SEQP_MIDI_EVTs may flush events that were * posted after the call to alSeqpStop, so the * application must queue these events either when * the player is fully stopped, or when it is * playing. */ alEvtqFlushType(&seqp->evtq, AL_SEQ_REF_EVT); alEvtqFlushType(&seqp->evtq, AL_SEQP_MIDI_EVT); /* * sct 1/3/96 - Check to see which voices need to be * killed and release them. Unkilled voices should * have note end events occurring prior to * KILL_TIME. */ for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if (__voiceNeedsNoteKill (seqp, &vs->voice, KILL_TIME)) __seqpReleaseVoice(seqp, &vs->voice, KILL_TIME); } seqp->state = AL_STOPPING; evt.type = AL_SEQP_STOP_EVT; alEvtqPostEvent(&seqp->evtq, &evt, AL_EVTQ_END); } break; case (AL_SEQP_VOL_EVT): seqp->vol = seqp->nextEvent.msg.spvol.vol; for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { alSynSetVol(seqp->drvr, &vs->voice, __vsVol(vs, seqp), __vsDelta(vs, seqp->curTime)); } break; case (AL_SEQP_LOOP_EVT): seqp->loopStart = seqp->nextEvent.msg.loop.start; seqp->loopEnd = seqp->nextEvent.msg.loop.end; seqp->loopCount = seqp->nextEvent.msg.loop.count; break; case (AL_SEQP_PRIORITY_EVT): chan = seqp->nextEvent.msg.sppriority.chan; seqp->chanState[chan].priority = seqp->nextEvent.msg.sppriority.priority; break; case (AL_SEQP_SEQ_EVT): #if BUILD_VERSION < VERSION_J // Adjust line numbers to match asserts #line 295 #endif assert(seqp->state != AL_PLAYING); /* Must be done playing to change sequences. */ seqp->target = seqp->nextEvent.msg.spseq.seq; __setUsptFromTempo (seqp, 500000.0); if (seqp->bank) __initFromBank(seqp, seqp->bank); break; case (AL_SEQP_BANK_EVT): #if BUILD_VERSION < VERSION_J #line 304 #endif assert(seqp->state == AL_STOPPED); /* Must be fully stopped to change banks. */ seqp->bank = seqp->nextEvent.msg.spbank.bank; __initFromBank(seqp, seqp->bank); break; /* sct 11/6/95 - these events should now be handled by __handleNextSeqEvent */ case (AL_SEQ_END_EVT): case (AL_TEMPO_EVT): case (AL_SEQ_MIDI_EVT): #if BUILD_VERSION < VERSION_J #line 314 #endif assert(FALSE); break; } seqp->nextDelta = alEvtqNextEvent (&seqp->evtq, &seqp->nextEvent); } while (seqp->nextDelta == 0); /* * assume that next callback won't be more than half an hour away */ seqp->curTime += seqp->nextDelta; /* Update the player's current time. */ return seqp->nextDelta; } /* Calculates the delta time in ticks until the next sequence event taking into account loop points, and posts a sequence reference event with the time in usecs. Does nothing if the sequence player is not playing or there is no target sequence. sct 11/7/95 */ void __postNextSeqEvent(ALSeqPlayer *seqp) { ALEvent evt; s32 deltaTicks; ALSeq *seq = seqp->target; /* sct 1/5/96 - Do nothing if we're not playing or don't have a target sequence. */ if ((seqp->state != AL_PLAYING) || (seq == NULL)) return; /* Get the next event time in ticks. */ /* If false is returned, then there is no next delta (ie. end of sequence reached). */ if (!__alSeqNextDelta(seq, &deltaTicks)) return; /* Handle loops. */ if (seqp->loopCount) { /* Assume that the loop end falls on a MIDI event. Delta time will be correct even if we loop */ if (alSeqGetTicks(seq) + deltaTicks >= seqp->loopEnd->curTicks) { alSeqSetLoc(seq, seqp->loopStart); if (seqp->loopCount != -1) seqp->loopCount--; } } evt.type = AL_SEQ_REF_EVT; alEvtqPostEvent(&seqp->evtq, &evt, deltaTicks * seqp->uspt); } /* Call this routine to handle the next event in the sequence. Assumes that the next sequence event is scheduled to be processed immediately since it does not check the event's tick time. sct 11/7/95 */ static void __handleNextSeqEvent(ALSeqPlayer *seqp) { ALEvent evt; /* sct 1/5/96 - Do nothing if we don't have a target sequence. */ if (seqp->target == NULL) return; alSeqNextEvent(seqp->target, &evt); switch (evt.type) { case AL_SEQ_MIDI_EVT: __handleMIDIMsg(seqp, &evt); __postNextSeqEvent(seqp); break; case AL_TEMPO_EVT: __handleMetaMsg(seqp, &evt); __postNextSeqEvent(seqp); break; case AL_SEQ_END_EVT: seqp->state = AL_STOPPING; evt.type = AL_SEQP_STOP_EVT; alEvtqPostEvent(&seqp->evtq, &evt, AL_EVTQ_END); break; default: #if BUILD_VERSION < VERSION_J #line 411 #endif assert(FALSE); /* Sequence event type not supported. */ #if BUILD_VERSION >= VERSION_J break; #endif } } void __handleMIDIMsg(ALSeqPlayer *seqp, ALEvent *event) { ALVoice *voice; ALVoiceState *vs; s32 status; u8 chan; u8 key; u8 vel; u8 byte1; u8 byte2; ALMIDIEvent *midi = &event->msg.midi; s16 vol; ALEvent evt; ALMicroTime deltaTime; ALVoiceState *vstate; ALPan pan; ALFxRef fxref; #if BUILD_VERSION < VERSION_J #line 434 #endif /* sct 12/15/95 - Fixed assert to also allow seqp midi event types. */ assert(event->type == AL_SEQ_MIDI_EVT || event->type == AL_SEQP_MIDI_EVT); status = midi->status & AL_MIDI_StatusMask; chan = midi->status & AL_MIDI_ChannelMask; byte1 = key = midi->byte1; byte2 = vel = midi->byte2; switch (status) { case (AL_MIDI_NoteOn): if (vel != 0) { /* a real note on */ ALVoiceConfig config; ALSound *sound; s16 cents; f32 pitch,oscValue; u8 fxmix; void *oscState; ALInstrument *inst; /* If we're not playing, don't process note ons. */ if (seqp->state != AL_PLAYING) break; sound = __lookupSoundQuick(seqp, key, vel, chan); ALFlagFailIf(!sound, seqp->debugFlags & NO_SOUND_ERR_MASK, ERR_ALSEQP_NO_SOUND); config.priority = seqp->chanState[chan].priority; config.fxBus = 0; config.unityPitch = 0; vstate = __mapVoice(seqp, key, vel, chan); ALFlagFailIf(!vstate, seqp->debugFlags & NO_VOICE_ERR_MASK, ERR_ALSEQP_NO_VOICE ); voice = &vstate->voice; alSynAllocVoice(seqp->drvr, voice, &config); /* * set up the voice state structure */ vstate->sound = sound; vstate->envPhase = AL_PHASE_ATTACK; if (seqp->chanState[chan].sustain > AL_SUSTAIN) vstate->phase = AL_PHASE_SUSTAIN; else vstate->phase = AL_PHASE_NOTEON; cents = (key - sound->keyMap->keyBase) * 100 + sound->keyMap->detune; vstate->pitch = alCents2Ratio(cents); vstate->envGain = sound->envelope->attackVolume; vstate->envEndTime = seqp->curTime + sound->envelope->attackTime; /* * setup tremelo and vibrato if active */ vstate->flags = 0; inst = seqp->chanState[chan].instrument; oscValue = (f32)AL_VOL_FULL; /* set this as a default */ if(inst->tremType) { if(seqp->initOsc) { deltaTime = (*seqp->initOsc)(&oscState,&oscValue, inst->tremType, inst->tremRate, inst->tremDepth, inst->tremDelay); if(deltaTime) /* if deltaTime = zero, don't run osc */ { evt.type = AL_TREM_OSC_EVT; evt.msg.osc.vs = vstate; evt.msg.osc.oscState = oscState; alEvtqPostEvent(&seqp->evtq, &evt, deltaTime); vstate->flags |= 0x01; /* set tremelo flag bit */ } } } /* will default if not changed by initOsc */ vstate->tremelo = (u8)oscValue; oscValue = 1.0f; /* set this as a default */ if(inst->vibType) { if(seqp->initOsc) { deltaTime = (*seqp->initOsc)(&oscState,&oscValue, inst->vibType, inst->vibRate, inst->vibDepth, inst->vibDelay); if(deltaTime) /* if deltaTime = zero,don't run osc. */ { evt.type = AL_VIB_OSC_EVT; evt.msg.osc.vs = vstate; evt.msg.osc.oscState = oscState; evt.msg.osc.chan = chan; alEvtqPostEvent(&seqp->evtq, &evt, deltaTime); vstate->flags |= 0x02; /* set the vibrato flag bit */ } } } /* will default if not changed by initOsc */ vstate->vibrato = oscValue; /* * calculate the note on parameters */ pitch = vstate->pitch * seqp->chanState[chan].pitchBend * vstate->vibrato; fxmix = seqp->chanState[chan].fxmix; pan = __vsPan(vstate, seqp); vol = __vsVol(vstate, seqp); deltaTime = sound->envelope->attackTime; alSynStartVoiceParams(seqp->drvr, voice, sound->wavetable, pitch, vol, pan, fxmix, deltaTime); /* * set up callbacks for envelope */ evt.type = AL_SEQP_ENV_EVT; evt.msg.vol.voice = voice; evt.msg.vol.vol = sound->envelope->decayVolume; evt.msg.vol.delta = sound->envelope->decayTime; deltaTime = sound->envelope->attackTime; alEvtqPostEvent(&seqp->evtq, &evt, deltaTime); break; } /* * NOTE: intentional fall-through for note on with zero * velocity */ case (AL_MIDI_NoteOff): vstate = __lookupVoice(seqp, key, chan); ALFlagFailIf(!vstate, (seqp->debugFlags & NOTE_OFF_ERR_MASK), ERR_ALSEQP_OFF_VOICE ); if (vstate->phase == AL_PHASE_SUSTAIN) vstate->phase = AL_PHASE_SUSTREL; else { vstate->phase = AL_PHASE_RELEASE; __seqpReleaseVoice(seqp, &vstate->voice, vstate->sound->envelope->releaseTime); } break; case (AL_MIDI_PolyKeyPressure): /* * Aftertouch per key (hardwired to volume). Note that * aftertouch affects only notes that are already * sounding. */ vstate = __lookupVoice(seqp, key, chan); ALFailIf(!vstate, ERR_ALSEQP_POLY_VOICE ); vstate->velocity = byte2; alSynSetVol(seqp->drvr, &vstate->voice, __vsVol(vstate, seqp), __vsDelta(vstate, seqp->curTime)); break; case (AL_MIDI_ChannelPressure): /* * Aftertouch per channel (hardwired to volume). Note that * aftertouch affects only notes that are already * sounding. */ for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if (vs->channel == chan) { vs->velocity = byte1; alSynSetVol(seqp->drvr, &vs->voice, __vsVol(vs, seqp), __vsDelta(vs, seqp->curTime)); } } break; case (AL_MIDI_ControlChange): switch (byte1) { case (AL_MIDI_PAN_CTRL): seqp->chanState[chan].pan = byte2; for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if (vs->channel == chan) { pan = __vsPan(vs, seqp); alSynSetPan(seqp->drvr, &vs->voice, pan); } } break; case (AL_MIDI_VOLUME_CTRL): seqp->chanState[chan].vol = byte2; for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if ((vs->channel == chan) && (vs->envPhase != AL_PHASE_RELEASE)) { vol = __vsVol(vs, seqp); alSynSetVol(seqp->drvr, &vs->voice, vol, __vsDelta(vs, seqp->curTime)); } } break; case (AL_MIDI_PRIORITY_CTRL): /* leave current voices where they are */ seqp->chanState[chan].priority = byte2; break; case (AL_MIDI_SUSTAIN_CTRL): seqp->chanState[chan].sustain = byte2; for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if ((vs->channel == chan) && (vs->phase != AL_PHASE_RELEASE)) { if ( byte2 > AL_SUSTAIN ) { /* * sustain pedal down */ if (vs->phase == AL_PHASE_NOTEON) vs->phase = AL_PHASE_SUSTAIN; } else { /* * sustain pedal up */ if (vs->phase == AL_PHASE_SUSTAIN) vs->phase = AL_PHASE_NOTEON; else if(vs->phase == AL_PHASE_SUSTREL) { vs->phase = AL_PHASE_RELEASE; __seqpReleaseVoice(seqp, &vs->voice, vs->sound->envelope->releaseTime); } } } } break; case (AL_MIDI_FX1_CTRL): seqp->chanState[chan].fxmix = byte2; for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if (vs->channel == chan) { alSynSetFXMix(seqp->drvr, &vs->voice, byte2); } } break; case (AL_MIDI_FX_CTRL_0): case (AL_MIDI_FX_CTRL_1): case (AL_MIDI_FX_CTRL_2): case (AL_MIDI_FX_CTRL_3): case (AL_MIDI_FX_CTRL_4): case (AL_MIDI_FX_CTRL_5): case (AL_MIDI_FX_CTRL_6): case (AL_MIDI_FX_CTRL_7): #if 0 /* fx control not implemented */ fxref = alSynGetFXRef(seqp->drvr, 0, 0); if (fxref) alSynSetFXParam(seqp->drvr, fxref, (s16)byte1, (void *)byte2); break; #endif case (AL_MIDI_FX3_CTRL): default: break; } break; case (AL_MIDI_ProgramChange): /* sct 1/16/96 - We must have a valid bank in order to process the program change. */ #if BUILD_VERSION < VERSION_J #line 713 #endif assert(seqp->bank != NULL); if (key < seqp->bank->instCount) { ALInstrument *inst = seqp->bank->instArray[key]; __setInstChanState(seqp, inst, chan); /* sct 11/6/95 */ } #ifdef _DEBUG else __osError(ERR_ALSEQPINVALIDPROG, 2, key, seqp->bank->instCount); #endif break; case (AL_MIDI_PitchBendChange): { s32 bendVal; f32 bendRatio; s32 cents; /* * get 14-bit unsigned midi value */ bendVal = ( (byte2 << 7) + byte1) - 8192; /* * calculate pitch bend in cents */ cents = (seqp->chanState[chan].bendRange * bendVal)/8192; /* * calculate the corresponding ratio */ bendRatio = alCents2Ratio(cents); seqp->chanState[chan].pitchBend = bendRatio; for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if (vs->channel == chan) { alSynSetPitch(seqp->drvr, &vs->voice, vs->pitch * bendRatio * vs->vibrato); } } } break; default: #ifdef _DEBUG __osError(ERR_ALSEQPUNKNOWNMIDI, 1, status); #endif break; } } void __handleMetaMsg(ALSeqPlayer *seqp, ALEvent *event) { ALTempoEvent *tevt = &event->msg.tempo; ALEvent evt; s32 tempo; if (event->msg.tempo.status == AL_MIDI_Meta) { if (event->msg.tempo.type == AL_MIDI_META_TEMPO) { tempo = (tevt->byte1 << 16) | (tevt->byte2 << 8) | (tevt->byte3 << 0); __setUsptFromTempo (seqp, (f32)tempo); /* sct 1/8/96 */ } } } ALVoiceState *__mapVoice(ALSeqPlayer *seqp, u8 key, u8 vel, u8 channel) { ALVoiceState *vs = seqp->vFreeList; if (vs) { seqp->vFreeList = vs->next; vs->next = 0; if (!seqp->vAllocHead) seqp->vAllocHead = vs; else seqp->vAllocTail->next = vs; seqp->vAllocTail = vs; vs->channel = channel; vs->key = key; vs->velocity = vel; vs->voice.clientPrivate = vs; } return vs; } void __unmapVoice(ALSeqPlayer *seqp, ALVoice *voice) { ALVoiceState *prev = 0; ALVoiceState *vs; /* * we could use doubly linked lists here and save some code and * execution time, but time spent here in negligible, so it won't * make much difference. */ for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if (&vs->voice == voice) { if (prev) prev->next = vs->next; else seqp->vAllocHead = vs->next; if (vs == seqp->vAllocTail) { seqp->vAllocTail = prev; } vs->next = seqp->vFreeList; seqp->vFreeList = vs; return; } prev = vs; } #ifdef _DEBUG __osError(ERR_ALSEQPUNMAP, 1, voice); #endif } ALVoiceState *__lookupVoice(ALSeqPlayer *seqp, u8 key, u8 channel) { ALVoiceState *vs; for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) { if ((vs->key == key) && (vs->channel == channel) && (vs->phase != AL_PHASE_RELEASE) && (vs->phase != AL_PHASE_SUSTREL)) return vs; } return 0; } #if 0 ALSound *__lookupSound(ALSeqPlayer *seqp, u8 key, u8 vel, u8 chan) { s32 i; ALInstrument *inst = seqp->chanState[chan].instrument; ALSound *snd = 0; for (i = 0; i < inst->soundCount; i++) { ALSound *sound = inst->soundArray[i]; ALKeyMap *keymap = sound->keyMap; if ((key >= keymap->keyMin) && (key <= keymap->keyMax) && (vel >= keymap->velocityMin) && (vel <= keymap->velocityMax)) { snd = sound; break; } } return snd; } #endif ALSound *__lookupSoundQuick(ALSeqPlayer *seqp, u8 key, u8 vel, u8 chan) { ALInstrument *inst = seqp->chanState[chan].instrument; s32 l = 1; s32 r = inst->soundCount; s32 i; ALKeyMap *keymap; #if BUILD_VERSION < VERSION_J #line 885 #endif assert(inst != NULL); /* sct 10/31/95 - If inst is NULL, then the seqp probably wasn't setup correctly. */ while (r >= l) { i = (l+r)/2; keymap = inst->soundArray[i-1]->keyMap; if ((key >= keymap->keyMin) && (key <= keymap->keyMax) && (vel >= keymap->velocityMin) && (vel <= keymap->velocityMax)) { return inst->soundArray[i-1]; } else if ((key < keymap->keyMin) || ((vel < keymap->velocityMin) && (key <= keymap->keyMax))) { r = i - 1; } else { l = i + 1; } } return 0; } /* * __vsVol calculates the target volume for the voice based on the * note on velocity, envelope, sampleVolume and controller. */ s16 __vsVol(ALVoiceState *vs, ALSeqPlayer *seqp) { u32 t1,t2; t1 = (vs->tremelo*vs->velocity*vs->envGain) >> 6; t2 = (vs->sound->sampleVolume*seqp->vol* seqp->chanState[vs->channel].vol) >> 14; t1 *= t2; t1 >>= 15; return( (s16)t1 ); } ALMicroTime __vsDelta(ALVoiceState *vs, ALMicroTime t) { /* * If we are interrupting a previously set envelope segment, we * need to recalculate the segment end time given the current * time. Note: this routine assumes that the voice is currently * playing. */ s32 delta = vs->envEndTime - t; if (delta >= 0) { return delta; } else { return AL_GAIN_CHANGE_TIME; } } ALPan __vsPan(ALVoiceState *vs, ALSeqPlayer *seqp) { s32 tmp; tmp = seqp->chanState[vs->channel].pan - AL_PAN_CENTER + vs->sound->samplePan; tmp = MAX(tmp, AL_PAN_LEFT); tmp = MIN(tmp, AL_PAN_RIGHT); return (ALPan) tmp; } #ifdef IMPLEMENTED s32 seqpGetVoices(SEQP *seqp); s32 seqpSetVoices(SEQP *seqp, s32 numvoices); u16 seqpGetChannelMask(SEQP *seqp); s32 seqpSetChannelMask(SEQP *seqp, u16 bitmask); #endif void __seqpReleaseVoice(ALSeqPlayer *seqp, ALVoice *voice, ALMicroTime deltaTime) { ALEvent evt; ALVoiceState *vs = (ALVoiceState *)voice->clientPrivate; /* * if in attack phase, remove all pending volume * events for this voice from the queue */ if (vs->envPhase == AL_PHASE_ATTACK) { ALLink *thisNode; ALLink *nextNode; ALEventListItem *thisItem, *nextItem; thisNode = seqp->evtq.allocList.next; while( thisNode != 0 ) { nextNode = thisNode->next; thisItem = (ALEventListItem *)thisNode; nextItem = (ALEventListItem *)nextNode; if (thisItem->evt.type == AL_SEQP_ENV_EVT) { if(thisItem->evt.msg.vol.voice == voice) { if( nextItem ) nextItem->delta += thisItem->delta; alUnlink(thisNode); alLink(thisNode, &seqp->evtq.freeList); } } thisNode = nextNode; } } vs->velocity = 0; vs->envPhase = AL_PHASE_RELEASE; vs->envGain = 0; vs->envEndTime = seqp->curTime + deltaTime; alSynSetPriority(seqp->drvr, voice, 0); /* make candidate for stealing */ alSynSetVol(seqp->drvr, voice, 0, deltaTime); evt.type = AL_NOTE_END_EVT; evt.msg.note.voice = voice; alEvtqPostEvent(&seqp->evtq, &evt, deltaTime); } /* This special purpose routine is called only when processing a stopping event in order to properly kill all active voices. The routine searches through the seqp's event queue for an AL_NOTE_END_EVT for the given voice. If the event's execution time is greater than kill time, it removes the event from the event queue and returns true that it needs to kill the voice. Otherwise, if the event's time is less than the kill time, it returns false that the voice needs to be killed. sct 1/3/96 */ #define VOICENEEDSNOTEKILL_DEBUG _DEBUG_INTERNAL&&0 /* For debugging voiceNeedsNoteKill routine. */ char __voiceNeedsNoteKill (ALSeqPlayer *seqp, ALVoice *voice, ALMicroTime killTime) { ALLink *thisNode; ALLink *nextNode; ALEventListItem *thisItem; ALMicroTime itemTime = 0; char needsNoteKill = TRUE; #if VOICENEEDSNOTEKILL_DEBUG alEvtqPrintAllocEvts (&seqp->evtq); #endif thisNode = seqp->evtq.allocList.next; while (thisNode != 0) { nextNode = thisNode->next; thisItem = (ALEventListItem *)thisNode; itemTime += thisItem->delta; if (thisItem->evt.type == AL_NOTE_END_EVT) { if (thisItem->evt.msg.note.voice == voice) { if (itemTime > killTime) { if ((ALEventListItem *)nextNode) ((ALEventListItem *)nextNode)->delta += thisItem->delta; alUnlink(thisNode); alLink(thisNode, &seqp->evtq.freeList); } else needsNoteKill = FALSE; break; } } thisNode = nextNode; } #if VOICENEEDSNOTEKILL_DEBUG if (thisNode) osSyncPrintf("vox 0x%0x: end time %d kill time %d\n\n", voice, itemTime, killTime); else osSyncPrintf("vox 0x%0x: not found\n\n", voice); alEvtqPrintAllocEvts (&seqp->evtq); #endif return needsNoteKill; } void __initFromBank(ALSeqPlayer *seqp, ALBank *b) { /* * init the chanState with the default instrument */ s32 i; ALInstrument *inst = 0; /* set to the first available instrument. */ for(i = 0; !inst ; i++) inst = b->instArray[i]; /* sct 11/6/95 - Setup the channel state for the given instrument. */ /* There is some wasted effort here since both calls the same state vars */ /* but it's safer. */ for (i = 0; i < seqp->maxChannels; i++) { __resetPerfChanState(seqp, i); __setInstChanState(seqp, inst, i); } if (b->percussion) { __resetPerfChanState(seqp, i); __setInstChanState(seqp, b->percussion, 9); } } /* sct 11/6/95 - Call this whenever a new instrument gets assigned to a channel such as when changing banks or in response to a MIDI program change event. Currently also gets called when changing sequences. */ void __setInstChanState(ALSeqPlayer *seqp, ALInstrument *inst, s32 chan) { seqp->chanState[chan].instrument = inst; seqp->chanState[chan].pan = inst->pan; seqp->chanState[chan].vol = inst->volume; seqp->chanState[chan].priority = inst->priority; seqp->chanState[chan].bendRange = inst->bendRange; } /* sct 11/6/95 -- Call this whenever a new sequence is to be played or when initializing a sequence player. */ void __resetPerfChanState(ALSeqPlayer *seqp, s32 chan) { seqp->chanState[chan].fxId = AL_FX_NONE; seqp->chanState[chan].fxmix = AL_DEFAULT_FXMIX; seqp->chanState[chan].pan = AL_PAN_CENTER; seqp->chanState[chan].vol = AL_VOL_FULL; seqp->chanState[chan].priority = AL_DEFAULT_PRIORITY; seqp->chanState[chan].sustain = 0; seqp->chanState[chan].bendRange = 200; seqp->chanState[chan].pitchBend = 1.0f; } /* sct 11/6/95 - Called only when creating a new sequence player. */ void __initChanState(ALSeqPlayer *seqp) { int i; for (i = 0; i < seqp->maxChannels; i++) { seqp->chanState[i].instrument = 0; __resetPerfChanState (seqp, i); } } void __seqpStopOsc(ALSeqPlayer *seqp, ALVoiceState *vs) { ALEventListItem *thisNode,*nextNode; s16 evtType; thisNode = (ALEventListItem*)seqp->evtq.allocList.next; while(thisNode) { nextNode = (ALEventListItem*)thisNode->node.next; evtType = thisNode->evt.type; if(evtType == AL_TREM_OSC_EVT || evtType == AL_VIB_OSC_EVT) { if(thisNode->evt.msg.osc.vs == vs) { (*seqp->stopOsc)(thisNode->evt.msg.osc.oscState); alUnlink((ALLink*)thisNode); if(nextNode) nextNode->delta += thisNode->delta; alLink((ALLink*)thisNode, &seqp->evtq.freeList); if(evtType == AL_TREM_OSC_EVT) vs->flags = vs->flags & 0xFE; else /* must be a AL_VIB_OSC_EVT */ vs->flags = vs->flags & 0xFD; if(!vs->flags) return; /* there should be no more events */ } } thisNode = nextNode; } } /* This routine safely calculates the sequence player's uspt value based on the given tempo. It does this safely by making sure that the player has a target sequence and therefore a qnpt value which is needed for the calculation. */ static void __setUsptFromTempo (ALSeqPlayer *seqp, f32 tempo) { if (seqp->target) seqp->uspt = (s32)((f32)tempo * seqp->target->qnpt); else seqp->uspt = 488; /* This is the initial value set by alSeqpNew. */ }