Files
banjo-kazooie/src/core1/done/audio/n_seqplayer.c
2022-10-10 19:06:51 -05:00

1197 lines
37 KiB
C

#include <ultra64.h>
#include "n_libaudio.h"
#include "n_synth.h"
#include "file_and_line.h"
#include "assert.h"
// #include "functions.h"
// #include "variables.h"
#define KILL_TIME 50000
void __n_postNextSeqEvent(N_ALSeqPlayer *seqp);
N_ALVoiceState *__n_mapVoice(N_ALSeqPlayer *seqp, u8 key, u8 vel, u8 channel);
void __n_unmapVoice(N_ALSeqPlayer *seqp, N_ALVoice *voice) ;
N_ALVoiceState *__n_lookupVoice(N_ALSeqPlayer *seqp, u8 key, u8 channel);
ALSound *__n_lookupSound(N_ALSeqPlayer *seqp, u8 key, u8 vel, u8 chan);
ALSound *__n_lookupSoundQuick(N_ALSeqPlayer *seqp, u8 key, u8 vel, u8 chan);
s16 __n_vsVol(N_ALVoiceState *vs, N_ALSeqPlayer *seqp);
ALMicroTime __n_vsDelta(N_ALVoiceState *vs, ALMicroTime t);
ALPan __n_vsPan(N_ALVoiceState *vs, N_ALSeqPlayer *seqp);
void __n_seqpReleaseVoice(N_ALSeqPlayer *seqp, N_ALVoice *voice, ALMicroTime deltaTime);
char __n_voiceNeedsNoteKill (N_ALSeqPlayer *seqp, N_ALVoice *voice, ALMicroTime killTime);
void __n_initFromBank(N_ALSeqPlayer *seqp, ALBank *b);
void __n_setInstChanState(N_ALSeqPlayer *seqp, ALInstrument *inst, s32 chan);
void __n_resetPerfChanState(N_ALSeqPlayer *seqp, s32 chan);
void __n_initChanState(N_ALSeqPlayer *seqp);
void __n_seqpStopOsc(N_ALSeqPlayer *seqp, N_ALVoiceState *vs);
void func_80263850(ALSeq *, N_ALEvent *);
static ALMicroTime __n_seqpVoiceHandler(void *node);
static void __n_handleMIDIMsg(N_ALSeqPlayer *seqp, N_ALEvent *event); //__handleMIDIMsg
static void __n_handleMetaMsg(N_ALSeqPlayer *seqp, N_ALEvent *event); //__handleMetaMsg
static void __n_handleNextSeqEvent(N_ALSeqPlayer *seqp);
static void __n_setUsptFromTempo(N_ALSeqPlayer *seqp, f32 tempo); /* sct 1/8/96 */
/*
* Sequence Player public functions
*/
void n_alSeqpNew(N_ALSeqPlayer *seqp, ALSeqpConfig *c)
{
s32 i;
N_ALEventListItem *items;
N_ALVoiceState *vs;
N_ALVoiceState *voices;
ALHeap *hp = c->heap;
/*
* initialize member variables
*/
seqp->bank = 0;
seqp->target = NULL;
seqp->drvr = (N_ALSynth *)&n_syn->head;
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) );
__n_initChanState(seqp); /* sct 11/6/95 */
/*
* init the voice state array
*/
voices = alHeapAlloc(hp, c->maxVoices, sizeof(N_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(N_ALEventListItem));
alEvtqNew(&seqp->evtq, (ALEventListItem *)items, c->maxEvents);
/*
* add ourselves to the driver
*/
seqp->node.next = NULL;
seqp->node.handler = __n_seqpVoiceHandler;
seqp->node.clientData = seqp;
n_alSynAddSeqPlayer(&seqp->node);
}
/*************************************************************
* private routines or driver callback routines
*************************************************************/
ALMicroTime __n_seqpVoiceHandler(void *node)
{
N_ALSeqPlayer *seqp = (N_ALSeqPlayer *) node;
N_ALEvent evt;
N_ALVoice *voice;
ALMicroTime delta;
N_ALVoiceState *vs;
void *oscState;
f32 oscValue;
u8 chan;
do {
switch (seqp->nextEvent.type) {
case (AL_SEQ_REF_EVT):
__n_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;
n_alSynStopVoice(voice);
n_alSynFreeVoice(voice);
vs = (N_ALVoiceState *)voice->clientPrivate;
if(vs->flags)
__n_seqpStopOsc((N_ALSeqPlayer*)seqp,vs);
__n_unmapVoice(seqp, voice);
break;
case (AL_SEQP_ENV_EVT):
voice = seqp->nextEvent.msg.vol.voice;
vs = (N_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;
n_alSynSetVol(voice, __n_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;
n_alSynSetVol(&vs->voice, __n_vsVol(vs,seqp), __n_vsDelta(vs,seqp->curTime));
evt.type = AL_TREM_OSC_EVT;
evt.msg.osc.vs = vs;
evt.msg.osc.oscState = oscState;
alEvtqPostEvent(&seqp->evtq, (ALEvent *)&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;
n_alSynSetPitch(&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, (ALEvent *)&evt, delta);
break;
case (AL_SEQP_MIDI_EVT):
__n_handleMIDIMsg(seqp, &seqp->nextEvent);
break;
case (AL_SEQP_META_EVT):
__n_handleMetaMsg(seqp, &seqp->nextEvent);
break;
case (AL_SEQP_PLAY_EVT):
if (seqp->state != AL_PLAYING)
{
seqp->state = AL_PLAYING;
__n_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)
{
n_alSynStopVoice(&vs->voice);
n_alSynFreeVoice(&vs->voice);
if(vs->flags)
__n_seqpStopOsc((N_ALSeqPlayer*)seqp,vs);
__n_unmapVoice((N_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 (__n_voiceNeedsNoteKill (seqp, &vs->voice, KILL_TIME))
__n_seqpReleaseVoice(seqp, &vs->voice, KILL_TIME);
}
seqp->state = AL_STOPPING;
evt.type = AL_SEQP_STOP_EVT;
alEvtqPostEvent(&seqp->evtq, (ALEvent *)&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) {
n_alSynSetVol(&vs->voice, __n_vsVol(vs, seqp), __n_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):
matching_assert(seqp->state != AL_PLAYING, n_seqplayer.c, 0x11A); /* Must be done playing to change sequences. */
seqp->target = seqp->nextEvent.msg.spseq.seq;
__n_setUsptFromTempo (seqp, 500000.0);
if (seqp->bank)
__n_initFromBank(seqp, seqp->bank);
break;
case (AL_SEQP_BANK_EVT):
matching_assert(seqp->state == AL_STOPPED, n_seqplayer.c, 0x123); /* Must be fully stopped to change banks. */
seqp->bank = seqp->nextEvent.msg.spbank.bank;
__n_initFromBank(seqp, seqp->bank);
break;
/* sct 11/6/95 - these events should now be handled by __n_handleNextSeqEvent */
case (AL_SEQ_END_EVT):
case (AL_TEMPO_EVT):
case (AL_SEQ_MIDI_EVT):
matching_assert(FALSE, n_seqplayer.c, 0x12d);
break;
}
seqp->nextDelta = alEvtqNextEvent (&seqp->evtq, (ALEvent *)&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;
}
/*
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
__n_handleNextSeqEvent(N_ALSeqPlayer *seqp)
{
N_ALEvent evt;
/* sct 1/5/96 - Do nothing if we don't have a target sequence. */
if (seqp->target == NULL)
return;
func_80263850(seqp->target, &evt);
switch (evt.type)
{
case AL_SEQ_MIDI_EVT:
__n_handleMIDIMsg(seqp, &evt);
__n_postNextSeqEvent(seqp);
break;
case AL_TEMPO_EVT:
__n_handleMetaMsg(seqp, &evt);
__n_postNextSeqEvent(seqp);
break;
case AL_SEQ_END_EVT:
seqp->state = AL_STOPPING;
evt.type = AL_SEQP_STOP_EVT;
alEvtqPostEvent(&seqp->evtq, (ALEvent *)&evt, AL_EVTQ_END);
break;
default:
matching_assert(FALSE, n_seqplayer.c, 0x162); /* Sequence event type not supported. */
}
}
void __n_handleMIDIMsg(N_ALSeqPlayer *seqp, N_ALEvent *event)
{
N_ALVoice *voice;
N_ALVoiceState *vs;
s32 status;
u8 chan;
u8 key;
u8 vel;
u8 byte1;
u8 byte2;
ALMIDIEvent *midi = &event->msg.midi;
s16 vol;
N_ALEvent evt;
ALMicroTime deltaTime;
N_ALVoiceState *vstate;
ALPan pan;
ALFxRef fxref;
/* sct 12/15/95 - Fixed assert to also allow seqp midi event types. */
matching_assert(event->type == AL_SEQ_MIDI_EVT || event->type == AL_SEQP_MIDI_EVT, n_seqplayer.c, 0x17b);
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 = __n_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 = __n_mapVoice(seqp, key, vel, chan);
ALFlagFailIf(!vstate, seqp->debugFlags & NO_VOICE_ERR_MASK,
ERR_ALSEQP_NO_VOICE );
voice = &vstate->voice;
n_alSynAllocVoice(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, (ALEvent *)&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, (ALEvent *)&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 = __n_vsPan(vstate, seqp);
vol = __n_vsVol(vstate, seqp);
deltaTime = sound->envelope->attackTime;
n_alSynStartVoiceParams(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, (ALEvent *)&evt, deltaTime);
break;
}
/*
* NOTE: intentional fall-through for note on with zero
* velocity
*/
case (AL_MIDI_NoteOff):
vstate = __n_lookupVoice(seqp, key, chan);
ALFlagFailIf(!vstate, (seqp->debugFlags & NOTE_OFF_ERR_MASK),
ERR_ALSEQP_OFF_VOICE );
if (vstate->phase == AL_PHASE_SUSTAIN)
{
rmonPrintf("TRACE: '%s' {Line %d}\n", FILE(n_seqplayer.c), LINE(0x211));
vstate->phase = AL_PHASE_SUSTREL;
} else {
vstate->phase = AL_PHASE_RELEASE;
rmonPrintf("TRACE: '%s' {Line %d}\n", FILE(n_seqplayer.c), LINE(0x214));
__n_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 = __n_lookupVoice(seqp, key, chan);
ALFailIf(!vstate, ERR_ALSEQP_POLY_VOICE );
vstate->velocity = byte2;
n_alSynSetVol(&vstate->voice, __n_vsVol(vstate, seqp),
__n_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;
n_alSynSetVol(&vs->voice, __n_vsVol(vs, seqp),
__n_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 = __n_vsPan(vs, seqp);
n_alSynSetPan(&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 = __n_vsVol(vs, seqp);
n_alSynSetVol(&vs->voice, vol,
__n_vsDelta(vs, seqp->curTime));
}
}
break;
case (0x7D):
seqp->chanState[chan].unkA = byte2;
for (vs = seqp->vAllocHead; vs != 0; vs = vs->next) {
if ((vs->channel == chan) &&
(vs->envPhase != AL_PHASE_RELEASE))
{
vol = __n_vsVol(vs, seqp);
n_alSynSetVol(&vs->voice, vol,
__n_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;
__n_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) {
n_alSynSetFXMix(&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. */
matching_assert(seqp->bank != NULL, n_seqplayer.c, 0x29c);
if (key < seqp->bank->instCount) {
ALInstrument *inst = seqp->bank->instArray[key];
__n_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) {
n_alSynSetPitch(&vs->voice,
vs->pitch * bendRatio * vs->vibrato);
}
}
}
break;
default:
#ifdef _DEBUG
__osError(ERR_ALSEQPUNKNOWNMIDI, 1, status);
#endif
break;
}
}
void __n_handleMetaMsg(N_ALSeqPlayer *seqp, N_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);
__n_setUsptFromTempo (seqp, (f32)tempo); /* sct 1/8/96 */
}
}
}
N_ALVoiceState *__n_mapVoice(N_ALSeqPlayer *seqp, u8 key, u8 vel, u8 channel)
{
N_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 __n_unmapVoice(N_ALSeqPlayer *seqp, N_ALVoice *voice)
{
N_ALVoiceState *prev = 0;
N_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
}
N_ALVoiceState *__n_lookupVoice(N_ALSeqPlayer *seqp, u8 key, u8 channel)
{
N_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 *__n_lookupSound(N_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 *__n_lookupSoundQuick(N_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;
matching_assert(inst != NULL, n_seqplayer.c, 0x3DE); /* 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;
}
/*
* __n_vsVol calculates the target volume for the voice based on the
* note on velocity, envelope, sampleVolume and controller.
*/
s16 __n_vsVol(N_ALVoiceState *vs, N_ALSeqPlayer *seqp)
{
u32 t1, t2;
t1 = (vs->tremelo*vs->velocity*vs->envGain*seqp->chanState[vs->channel].unkA) >> 13;
t2 = (vs->sound->sampleVolume*seqp->vol*seqp->chanState[vs->channel].vol) >> 14;
t1 *= t2;
t1 >>= 15;
return ((s16)t1);
}
ALMicroTime __n_vsDelta(N_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 __n_vsPan(N_ALVoiceState *vs, N_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 __n_seqpReleaseVoice(N_ALSeqPlayer *seqp, N_ALVoice *voice,
ALMicroTime deltaTime)
{
N_ALEvent evt;
N_ALVoiceState *vs = (N_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;
N_ALEventListItem *thisItem, *nextItem;
thisNode = seqp->evtq.allocList.next;
while( thisNode != 0 ) {
nextNode = thisNode->next;
thisItem = (N_ALEventListItem *)thisNode;
nextItem = (N_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;
n_alSynSetPriority(voice, 0); /* make candidate for stealing */
n_alSynSetVol(voice, 0, deltaTime);
evt.type = AL_NOTE_END_EVT;
evt.msg.note.voice = voice;
deltaTime += 0x7D00;
alEvtqPostEvent(&seqp->evtq, (ALEvent *)&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 __n_voiceNeedsNoteKill (N_ALSeqPlayer *seqp, N_ALVoice *voice, ALMicroTime killTime)
{
ALLink *thisNode;
ALLink *nextNode;
N_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 = (N_ALEventListItem *)thisNode;
itemTime += thisItem->delta;
if (thisItem->evt.type == AL_NOTE_END_EVT)
{
if (thisItem->evt.msg.note.voice == voice)
{
if (itemTime > killTime)
{
if ((N_ALEventListItem *)nextNode)
((N_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 __n_initFromBank(N_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++) {
__n_resetPerfChanState(seqp, i);
__n_setInstChanState(seqp, inst, i);
}
if (b->percussion) {
__n_resetPerfChanState(seqp, i);
__n_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 __n_setInstChanState(N_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 __n_resetPerfChanState(N_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].unkA = 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 __n_initChanState(N_ALSeqPlayer *seqp)
{
int i;
for (i = 0; i < seqp->maxChannels; i++)
{
seqp->chanState[i].instrument = 0;
__n_resetPerfChanState (seqp, i);
}
}
void __n_seqpStopOsc(N_ALSeqPlayer *seqp, N_ALVoiceState *vs)
{
N_ALEventListItem *thisNode,*nextNode;
s16 evtType;
thisNode = (N_ALEventListItem*)seqp->evtq.allocList.next;
while(thisNode)
{
nextNode = (N_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 __n_setUsptFromTempo (N_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. */
}
/*
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 __n_postNextSeqEvent(N_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);
}