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NetBSD/sys/dev/sequencer.c
christos 7ed28205b6 - add missing initializer 
- comment out impossible comparison
2006-09-03 05:19:38 +00:00

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/* $NetBSD: sequencer.c,v 1.34 2006/09/03 05:19:38 christos Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (augustss@NetBSD.org).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sequencer.c,v 1.34 2006/09/03 05:19:38 christos Exp $");
#include "sequencer.h"
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/vnode.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/syslog.h>
#include <sys/kernel.h>
#include <sys/signalvar.h>
#include <sys/conf.h>
#include <sys/audioio.h>
#include <sys/midiio.h>
#include <sys/device.h>
#include <dev/midi_if.h>
#include <dev/midivar.h>
#include <dev/sequencervar.h>
#define ADDTIMEVAL(a, b) ( \
(a)->tv_sec += (b)->tv_sec, \
(a)->tv_usec += (b)->tv_usec, \
(a)->tv_usec > 1000000 ? ((a)->tv_sec++, (a)->tv_usec -= 1000000) : 0\
)
#define SUBTIMEVAL(a, b) ( \
(a)->tv_sec -= (b)->tv_sec, \
(a)->tv_usec -= (b)->tv_usec, \
(a)->tv_usec < 0 ? ((a)->tv_sec--, (a)->tv_usec += 1000000) : 0\
)
#ifdef AUDIO_DEBUG
#define DPRINTF(x) if (sequencerdebug) printf x
#define DPRINTFN(n,x) if (sequencerdebug >= (n)) printf x
int sequencerdebug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif
#define SEQ_NOTE_MAX 128
#define SEQ_NOTE_XXX 255
#define RECALC_USPERDIV(t) \
((t)->usperdiv = 60*1000000L/((t)->tempo_beatpermin*(t)->timebase_divperbeat))
struct sequencer_softc seqdevs[NSEQUENCER];
void sequencerattach(int);
static void seq_reset(struct sequencer_softc *);
static int seq_do_command(struct sequencer_softc *, seq_event_t *);
static int seq_do_chnvoice(struct sequencer_softc *, seq_event_t *);
static int seq_do_chncommon(struct sequencer_softc *, seq_event_t *);
static void seq_timer_waitabs(struct sequencer_softc *, uint32_t);
static int seq_do_timing(struct sequencer_softc *, seq_event_t *);
static int seq_do_local(struct sequencer_softc *, seq_event_t *);
static int seq_do_sysex(struct sequencer_softc *, seq_event_t *);
static int seq_do_fullsize(struct sequencer_softc *, seq_event_t *, struct uio *);
static int seq_input_event(struct sequencer_softc *, seq_event_t *);
static int seq_drain(struct sequencer_softc *);
static void seq_startoutput(struct sequencer_softc *);
static void seq_timeout(void *);
static int seq_to_new(seq_event_t *, struct uio *);
static int seq_sleep_timo(int *, const char *, int);
static int seq_sleep(int *, const char *);
static void seq_wakeup(int *);
struct midi_softc;
static int midiseq_out(struct midi_dev *, u_char *, u_int, int);
static struct midi_dev *midiseq_open(int, int);
static void midiseq_close(struct midi_dev *);
static void midiseq_reset(struct midi_dev *);
static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *);
static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *);
static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *);
static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *);
static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *);
static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *);
static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *);
static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, struct uio *);
void midiseq_in(struct midi_dev *, u_char *, int);
static dev_type_open(sequenceropen);
static dev_type_close(sequencerclose);
static dev_type_read(sequencerread);
static dev_type_write(sequencerwrite);
static dev_type_ioctl(sequencerioctl);
static dev_type_poll(sequencerpoll);
static dev_type_kqfilter(sequencerkqfilter);
const struct cdevsw sequencer_cdevsw = {
sequenceropen, sequencerclose, sequencerread, sequencerwrite,
sequencerioctl, nostop, notty, sequencerpoll, nommap,
sequencerkqfilter, D_OTHER,
};
void
sequencerattach(int n)
{
for (n = 0; n < NSEQUENCER; n++)
callout_init(&seqdevs[n].sc_callout);
}
static int
sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l)
{
int unit = SEQUENCERUNIT(dev);
struct sequencer_softc *sc;
struct midi_dev *md;
int nmidi;
DPRINTF(("sequenceropen\n"));
if (unit >= NSEQUENCER)
return (ENXIO);
sc = &seqdevs[unit];
if (sc->isopen)
return EBUSY;
if (SEQ_IS_OLD(unit))
sc->mode = SEQ_OLD;
else
sc->mode = SEQ_NEW;
sc->isopen++;
sc->flags = flags & (FREAD|FWRITE);
sc->rchan = 0;
sc->wchan = 0;
sc->pbus = 0;
sc->async = 0;
sc->input_stamp = ~0;
sc->nmidi = 0;
nmidi = midi_unit_count();
sc->devs = malloc(nmidi * sizeof(struct midi_dev *),
M_DEVBUF, M_WAITOK);
for (unit = 0; unit < nmidi; unit++) {
md = midiseq_open(unit, flags);
if (md) {
sc->devs[sc->nmidi++] = md;
md->seq = sc;
md->doingsysex = 0;
}
}
sc->timer.timebase_divperbeat = 100;
sc->timer.tempo_beatpermin = 60;
RECALC_USPERDIV(&sc->timer);
sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0;
microtime(&sc->timer.reftime);
SEQ_QINIT(&sc->inq);
SEQ_QINIT(&sc->outq);
sc->lowat = SEQ_MAXQ / 2;
seq_reset(sc);
DPRINTF(("sequenceropen: mode=%d, nmidi=%d\n", sc->mode, sc->nmidi));
return 0;
}
static int
seq_sleep_timo(int *chan, const char *label, int timo)
{
int st;
if (!label)
label = "seq";
DPRINTFN(5, ("seq_sleep_timo: %p %s %d\n", chan, label, timo));
*chan = 1;
st = tsleep(chan, PWAIT | PCATCH, label, timo);
*chan = 0;
#ifdef MIDI_DEBUG
if (st != 0)
printf("seq_sleep: %d\n", st);
#endif
return st;
}
static int
seq_sleep(int *chan, const char *label)
{
return seq_sleep_timo(chan, label, 0);
}
static void
seq_wakeup(int *chan)
{
if (*chan) {
DPRINTFN(5, ("seq_wakeup: %p\n", chan));
wakeup(chan);
*chan = 0;
}
}
static int
seq_drain(struct sequencer_softc *sc)
{
int error;
DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq)));
seq_startoutput(sc);
error = 0;
while(!SEQ_QEMPTY(&sc->outq) && !error)
error = seq_sleep_timo(&sc->wchan, "seq_dr", 60*hz);
return (error);
}
static void
seq_timeout(void *addr)
{
struct sequencer_softc *sc = addr;
DPRINTFN(4, ("seq_timeout: %p\n", sc));
sc->timeout = 0;
seq_startoutput(sc);
if (SEQ_QLEN(&sc->outq) < sc->lowat) {
seq_wakeup(&sc->wchan);
selnotify(&sc->wsel, 0);
if (sc->async)
psignal(sc->async, SIGIO);
}
}
static void
seq_startoutput(struct sequencer_softc *sc)
{
struct sequencer_queue *q = &sc->outq;
seq_event_t cmd;
if (sc->timeout)
return;
DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q)));
while(!SEQ_QEMPTY(q) && !sc->timeout) {
SEQ_QGET(q, cmd);
seq_do_command(sc, &cmd);
}
}
static int
sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l)
{
struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
int n, s;
DPRINTF(("sequencerclose: %p\n", sc));
seq_drain(sc);
s = splaudio();
if (sc->timeout) {
callout_stop(&sc->sc_callout);
sc->timeout = 0;
}
splx(s);
for (n = 0; n < sc->nmidi; n++)
midiseq_close(sc->devs[n]);
free(sc->devs, M_DEVBUF);
sc->isopen = 0;
return (0);
}
static int
seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd)
{
struct sequencer_queue *q = &sc->inq;
DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x %02x %02x %02x\n",
cmd->tag,
cmd->unknown.byte[0], cmd->unknown.byte[1],
cmd->unknown.byte[2], cmd->unknown.byte[3],
cmd->unknown.byte[4], cmd->unknown.byte[5],
cmd->unknown.byte[6]));
if (SEQ_QFULL(q))
return (ENOMEM);
SEQ_QPUT(q, *cmd);
seq_wakeup(&sc->rchan);
selnotify(&sc->rsel, 0);
if (sc->async)
psignal(sc->async, SIGIO);
return 0;
}
void
seq_event_intr(void *addr, seq_event_t *iev)
{
struct sequencer_softc *sc = addr;
u_long t;
struct timeval now;
int s;
microtime(&now);
s = splsoftclock();
if (!sc->timer.running)
now = sc->timer.stoptime;
SUBTIMEVAL(&now, &sc->timer.reftime);
t = now.tv_sec * 1000000 + now.tv_usec;
t /= sc->timer.usperdiv;
t += sc->timer.divs_lastchange;
splx(s);
if (t != sc->input_stamp) {
seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t));
sc->input_stamp = t; /* XXX wha hoppen if timer is reset? */
}
seq_input_event(sc, iev);
}
static int
sequencerread(dev_t dev, struct uio *uio, int ioflag)
{
struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
struct sequencer_queue *q = &sc->inq;
seq_event_t ev;
int error, s;
DPRINTFN(20, ("sequencerread: %p, count=%d, ioflag=%x\n",
sc, (int) uio->uio_resid, ioflag));
if (sc->mode == SEQ_OLD) {
DPRINTFN(-1,("sequencerread: old read\n"));
return (EINVAL); /* XXX unimplemented */
}
error = 0;
while (SEQ_QEMPTY(q)) {
if (ioflag & IO_NDELAY)
return EWOULDBLOCK;
else {
error = seq_sleep(&sc->rchan, "seq rd");
if (error)
return error;
}
}
s = splaudio();
while (uio->uio_resid >= sizeof ev && !error && !SEQ_QEMPTY(q)) {
SEQ_QGET(q, ev);
error = uiomove(&ev, sizeof ev, uio);
}
splx(s);
return error;
}
static int
sequencerwrite(dev_t dev, struct uio *uio, int ioflag)
{
struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
struct sequencer_queue *q = &sc->outq;
int error;
seq_event_t cmdbuf;
int size;
DPRINTFN(2, ("sequencerwrite: %p, count=%d\n", sc, (int) uio->uio_resid));
error = 0;
size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE;
while (uio->uio_resid >= size) {
error = uiomove(&cmdbuf, size, uio);
if (error)
break;
if (sc->mode == SEQ_OLD)
if (seq_to_new(&cmdbuf, uio))
continue;
if (cmdbuf.tag == SEQ_FULLSIZE) {
/* We do it like OSS does, asynchronously */
error = seq_do_fullsize(sc, &cmdbuf, uio);
if (error)
break;
continue;
}
while (SEQ_QFULL(q)) {
seq_startoutput(sc);
if (SEQ_QFULL(q)) {
if (ioflag & IO_NDELAY)
return EWOULDBLOCK;
error = seq_sleep(&sc->wchan, "seq_wr");
if (error)
return error;
}
}
SEQ_QPUT(q, cmdbuf);
}
seq_startoutput(sc);
#ifdef SEQUENCER_DEBUG
if (error)
DPRINTFN(2, ("sequencerwrite: error=%d\n", error));
#endif
return error;
}
static int
sequencerioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct lwp *l)
{
struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
struct synth_info *si;
struct midi_dev *md;
int devno;
int error;
int s;
int t;
DPRINTFN(2, ("sequencerioctl: %p cmd=0x%08lx\n", sc, cmd));
error = 0;
switch (cmd) {
case FIONBIO:
/* All handled in the upper FS layer. */
break;
case FIOASYNC:
if (*(int *)addr) {
if (sc->async)
return EBUSY;
sc->async = l->l_proc;
DPRINTF(("sequencer_ioctl: FIOASYNC %p\n", l));
} else
sc->async = 0;
break;
case SEQUENCER_RESET:
seq_reset(sc);
break;
case SEQUENCER_PANIC:
seq_reset(sc);
/* Do more? OSS doesn't */
break;
case SEQUENCER_SYNC:
if (sc->flags == FREAD)
return 0;
seq_drain(sc);
error = 0;
break;
case SEQUENCER_INFO:
si = (struct synth_info*)addr;
devno = si->device;
if (devno < 0 || devno >= sc->nmidi)
return EINVAL;
md = sc->devs[devno];
strncpy(si->name, md->name, sizeof si->name);
si->synth_type = SYNTH_TYPE_MIDI;
si->synth_subtype = md->subtype;
si->nr_voices = md->nr_voices;
si->instr_bank_size = md->instr_bank_size;
si->capabilities = md->capabilities;
break;
case SEQUENCER_NRSYNTHS:
*(int *)addr = sc->nmidi;
break;
case SEQUENCER_NRMIDIS:
*(int *)addr = sc->nmidi;
break;
case SEQUENCER_OUTOFBAND:
DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n",
*(u_char *)addr, *(u_char *)(addr+1),
*(u_char *)(addr+2), *(u_char *)(addr+3),
*(u_char *)(addr+4), *(u_char *)(addr+5),
*(u_char *)(addr+6), *(u_char *)(addr+7)));
if ( !(sc->flags & FWRITE ) )
return EBADF;
error = seq_do_command(sc, (seq_event_t *)addr);
break;
case SEQUENCER_TMR_TIMEBASE:
t = *(int *)addr;
if (t < 1)
t = 1;
if (t > 10000)
t = 10000;
*(int *)addr = t;
s = splsoftclock();
sc->timer.timebase_divperbeat = t;
sc->timer.divs_lastchange = sc->timer.divs_lastevent;
microtime(&sc->timer.reftime);
RECALC_USPERDIV(&sc->timer);
splx(s);
break;
case SEQUENCER_TMR_START:
s = splsoftclock();
error = seq_do_timing(sc, &SEQ_MK_TIMING(START));
splx(s);
break;
case SEQUENCER_TMR_STOP:
s = splsoftclock();
error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP));
splx(s);
break;
case SEQUENCER_TMR_CONTINUE:
s = splsoftclock();
error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE));
splx(s);
break;
case SEQUENCER_TMR_TEMPO:
s = splsoftclock();
error = seq_do_timing(sc,
&SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr));
splx(s);
if (!error)
*(int *)addr = sc->timer.tempo_beatpermin;
break;
case SEQUENCER_TMR_SOURCE:
*(int *)addr = SEQUENCER_TMR_INTERNAL;
break;
case SEQUENCER_TMR_METRONOME:
/* noop */
break;
case SEQUENCER_THRESHOLD:
t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec);
if (t < 1)
t = 1;
if (t > SEQ_MAXQ)
t = SEQ_MAXQ;
sc->lowat = t;
break;
case SEQUENCER_CTRLRATE:
s = splsoftclock();
*(int *)addr = (sc->timer.tempo_beatpermin
*sc->timer.timebase_divperbeat + 30) / 60;
splx(s);
break;
case SEQUENCER_GETTIME:
{
struct timeval now;
u_long tx;
microtime(&now);
s = splsoftclock();
SUBTIMEVAL(&now, &sc->timer.reftime);
tx = now.tv_sec * 1000000 + now.tv_usec;
tx /= sc->timer.usperdiv;
tx += sc->timer.divs_lastchange;
splx(s);
*(int *)addr = tx;
break;
}
default:
DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd));
error = EINVAL;
break;
}
return error;
}
static int
sequencerpoll(dev_t dev, int events, struct lwp *l)
{
struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
int revents = 0;
DPRINTF(("sequencerpoll: %p events=0x%x\n", sc, events));
if (events & (POLLIN | POLLRDNORM))
if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq))
revents |= events & (POLLIN | POLLRDNORM);
if (events & (POLLOUT | POLLWRNORM))
if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat)
revents |= events & (POLLOUT | POLLWRNORM);
if (revents == 0) {
if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM)))
selrecord(l, &sc->rsel);
if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM)))
selrecord(l, &sc->wsel);
}
return revents;
}
static void
filt_sequencerrdetach(struct knote *kn)
{
struct sequencer_softc *sc = kn->kn_hook;
int s;
s = splaudio();
SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext);
splx(s);
}
static int
filt_sequencerread(struct knote *kn, long hint)
{
struct sequencer_softc *sc = kn->kn_hook;
/* XXXLUKEM (thorpej): make sure this is correct */
if (SEQ_QEMPTY(&sc->inq))
return (0);
kn->kn_data = sizeof(seq_event_rec);
return (1);
}
static const struct filterops sequencerread_filtops =
{ 1, NULL, filt_sequencerrdetach, filt_sequencerread };
static void
filt_sequencerwdetach(struct knote *kn)
{
struct sequencer_softc *sc = kn->kn_hook;
int s;
s = splaudio();
SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext);
splx(s);
}
static int
filt_sequencerwrite(struct knote *kn, long hint)
{
struct sequencer_softc *sc = kn->kn_hook;
/* XXXLUKEM (thorpej): make sure this is correct */
if (SEQ_QLEN(&sc->outq) >= sc->lowat)
return (0);
kn->kn_data = sizeof(seq_event_rec);
return (1);
}
static const struct filterops sequencerwrite_filtops =
{ 1, NULL, filt_sequencerwdetach, filt_sequencerwrite };
static int
sequencerkqfilter(dev_t dev, struct knote *kn)
{
struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
struct klist *klist;
int s;
switch (kn->kn_filter) {
case EVFILT_READ:
klist = &sc->rsel.sel_klist;
kn->kn_fop = &sequencerread_filtops;
break;
case EVFILT_WRITE:
klist = &sc->wsel.sel_klist;
kn->kn_fop = &sequencerwrite_filtops;
break;
default:
return (1);
}
kn->kn_hook = sc;
s = splaudio();
SLIST_INSERT_HEAD(klist, kn, kn_selnext);
splx(s);
return (0);
}
static void
seq_reset(struct sequencer_softc *sc)
{
int i, chn;
struct midi_dev *md;
if ( !(sc->flags & FWRITE) )
return;
for (i = 0; i < sc->nmidi; i++) {
md = sc->devs[i];
midiseq_reset(md);
for (chn = 0; chn < MAXCHAN; chn++) {
midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE,
.controller=MIDI_CTRL_NOTES_OFF));
midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE,
.controller=MIDI_CTRL_RESET));
midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND,
.value=MIDI_BEND_NEUTRAL));
}
}
}
static int
seq_do_command(struct sequencer_softc *sc, seq_event_t *b)
{
int dev;
DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op));
switch(b->tag) {
case SEQ_LOCAL:
return seq_do_local(sc, b);
case SEQ_TIMING:
return seq_do_timing(sc, b);
case SEQ_CHN_VOICE:
return seq_do_chnvoice(sc, b);
case SEQ_CHN_COMMON:
return seq_do_chncommon(sc, b);
case SEQ_SYSEX:
return seq_do_sysex(sc, b);
/* COMPAT */
case SEQOLD_MIDIPUTC:
dev = b->putc.device;
if (dev < 0 || dev >= sc->nmidi)
return (ENXIO);
return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0);
default:
DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag));
return (EINVAL);
}
}
static int
seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b)
{
int dev;
int error;
struct midi_dev *md;
dev = b->voice.device;
if (dev < 0 || dev >= sc->nmidi ||
b->voice.channel > 15 ||
b->voice.key >= SEQ_NOTE_MAX)
return ENXIO;
md = sc->devs[dev];
switch(b->voice.op) {
case MIDI_NOTEON: /* no need to special-case hidden noteoff here */
error = midiseq_noteon(md, b->voice.channel, b->voice.key, b);
break;
case MIDI_NOTEOFF:
error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b);
break;
case MIDI_KEY_PRESSURE:
error = midiseq_keypressure(md,
b->voice.channel, b->voice.key, b);
break;
default:
DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n",
b->voice.op));
error = EINVAL;
break;
}
return error;
}
static int
seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b)
{
int dev;
int error;
struct midi_dev *md;
dev = b->common.device;
if (dev < 0 || dev >= sc->nmidi ||
b->common.channel > 15)
return ENXIO;
md = sc->devs[dev];
DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op));
error = 0;
switch(b->common.op) {
case MIDI_PGM_CHANGE:
error = midiseq_pgmchange(md, b->common.channel, b);
break;
case MIDI_CTL_CHANGE:
error = midiseq_ctlchange(md, b->common.channel, b);
break;
case MIDI_PITCH_BEND:
error = midiseq_pitchbend(md, b->common.channel, b);
break;
case MIDI_CHN_PRESSURE:
error = midiseq_chnpressure(md, b->common.channel, b);
break;
default:
DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n",
b->common.op));
error = EINVAL;
break;
}
return error;
}
static int
seq_do_local(struct sequencer_softc *sc, seq_event_t *b)
{
return (EINVAL);
}
static int
seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b)
{
int dev, i;
struct midi_dev *md;
uint8_t *bf = b->sysex.buffer;
dev = b->sysex.device;
if (dev < 0 || dev >= sc->nmidi)
return (ENXIO);
DPRINTF(("seq_do_sysex: dev=%d\n", dev));
md = sc->devs[dev];
if (!md->doingsysex) {
midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0);
md->doingsysex = 1;
}
for (i = 0; i < 6 && bf[i] != 0xff; i++)
;
midiseq_out(md, bf, i, 0);
if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END))
md->doingsysex = 0;
return 0;
}
static void
seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs)
{
struct timeval when;
long long usec;
struct syn_timer *t;
int ticks;
t = &sc->timer;
t->divs_lastevent = divs;
divs -= t->divs_lastchange;
usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */
when.tv_sec = usec / 1000000;
when.tv_usec = usec % 1000000;
DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%ld.%06ld",
divs, when.tv_sec, when.tv_usec));
ADDTIMEVAL(&when, &t->reftime); /* abstime for end */
ticks = hzto(&when);
DPRINTFN(4, (" when+start=%ld.%06ld, tick=%d\n",
when.tv_sec, when.tv_usec, ticks));
if (ticks > 0) {
#ifdef DIAGNOSTIC
if (ticks > 20 * hz) {
/* Waiting more than 20s */
printf("seq_timer_waitabs: funny ticks=%d, "
"usec=%lld\n", ticks, usec);
}
#endif
sc->timeout = 1;
callout_reset(&sc->sc_callout, ticks,
seq_timeout, sc);
}
#ifdef SEQUENCER_DEBUG
else if (tick < 0)
DPRINTF(("seq_timer_waitabs: ticks = %d\n", ticks));
#endif
}
static int
seq_do_timing(struct sequencer_softc *sc, seq_event_t *b)
{
struct syn_timer *t = &sc->timer;
struct timeval when;
int error;
error = 0;
switch(b->timing.op) {
case TMR_WAIT_REL:
seq_timer_waitabs(sc,
b->t_WAIT_REL.divisions + t->divs_lastevent);
break;
case TMR_WAIT_ABS:
seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions);
break;
case TMR_START:
microtime(&t->reftime);
t->divs_lastevent = t->divs_lastchange = 0;
t->running = 1;
break;
case TMR_STOP:
microtime(&t->stoptime);
t->running = 0;
break;
case TMR_CONTINUE:
if (t->running)
break;
microtime(&when);
SUBTIMEVAL(&when, &t->stoptime);
ADDTIMEVAL(&t->reftime, &when);
t->running = 1;
break;
case TMR_TEMPO:
/* bpm is unambiguously MIDI clocks per minute / 24 */
/* (24 MIDI clocks are usually but not always a quarter note) */
if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */
t->tempo_beatpermin = 8;
else if (b->t_TEMPO.bpm > 360) /* ? */
t->tempo_beatpermin = 360;
else
t->tempo_beatpermin = b->t_TEMPO.bpm;
t->divs_lastchange = t->divs_lastevent;
microtime(&t->reftime);
RECALC_USPERDIV(t);
break;
case TMR_ECHO:
error = seq_input_event(sc, b);
break;
case TMR_RESET:
t->divs_lastevent = t->divs_lastchange = 0;
microtime(&t->reftime);
break;
case TMR_SPP:
case TMR_TIMESIG:
DPRINTF(("seq_do_timing: unimplemented %02x\n", b->timing.op));
error = EINVAL; /* not quite accurate... */
break;
default:
DPRINTF(("seq_timer: unknown %02x\n", b->timing.op));
error = EINVAL;
break;
}
return (error);
}
static int
seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio)
{
struct sysex_info sysex;
u_int dev;
#ifdef DIAGNOSTIC
if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) {
printf("seq_do_fullsize: sysex size ??\n");
return EINVAL;
}
#endif
memcpy(&sysex, b, sizeof sysex);
dev = sysex.device_no;
if (/* dev < 0 || */ dev >= sc->nmidi)
return (ENXIO);
DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n",
sysex.key, dev, sysex.len));
return (midiseq_loadpatch(sc->devs[dev], &sysex, uio));
}
/*
* Convert an old sequencer event to a new one.
* NOTE: on entry, *ev may contain valid data only in the first 4 bytes.
* That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the
* caller will only look at the first bytes in that case anyway. Ugly? Sure.
*/
static int
seq_to_new(seq_event_t *ev, struct uio *uio)
{
int cmd, chan, note, parm;
uint32_t tmp_delay;
int error;
uint8_t *bfp;
cmd = ev->tag;
bfp = ev->unknown.byte;
chan = *bfp++;
note = *bfp++;
parm = *bfp++;
DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm));
if (cmd >= 0x80) {
/* Fill the event record */
if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) {
error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio);
if (error)
return error;
} else
return EINVAL;
}
switch(cmd) {
case SEQOLD_NOTEOFF:
/*
* What's with the SEQ_NOTE_XXX? In OSS this seems to have
* been undocumented magic for messing with the overall volume
* of a 'voice', equated precariously with 'channel' and
* pretty much unimplementable except by directly frobbing a
* synth chip. For us, who treat everything as interfaced over
* MIDI, this will just be unceremoniously discarded as
* invalid in midiseq_noteoff, making the whole event an
* elaborate no-op, and that doesn't seem to be any different
* from what happens on linux with a MIDI-interfaced device,
* by the way. The moral is ... use the new /dev/music API, ok?
*/
*ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan,
.key=SEQ_NOTE_XXX, .velocity=parm);
break;
case SEQOLD_NOTEON:
*ev = SEQ_MK_CHN(NOTEON,
.device=0, .channel=chan, .key=note, .velocity=parm);
break;
case SEQOLD_WAIT:
/*
* This event cannot even /exist/ on non-littleendian machines,
* and so help me, that's exactly the way OSS defined it.
* Also, the OSS programmer's guide states (p. 74, v1.11)
* that seqold time units are system clock ticks, unlike
* the new 'divisions' which are determined by timebase. In
* that case we would need to do scaling here - but no such
* behavior is visible in linux either--which also treats this
* value, surprisingly, as an absolute, not relative, time.
* My guess is that this event has gone unused so long that
* nobody could agree we got it wrong no matter what we do.
*/
tmp_delay = *(uint32_t *)ev >> 8;
*ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay);
break;
case SEQOLD_SYNCTIMER:
/*
* The TMR_RESET event is not defined in any OSS materials
* I can find; it may have been invented here just to provide
* an accurate _to_new translation of this event.
*/
*ev = SEQ_MK_TIMING(RESET);
break;
case SEQOLD_PGMCHANGE:
*ev = SEQ_MK_CHN(PGM_CHANGE,
.device=0, .channel=chan, .program=note);
break;
case SEQOLD_MIDIPUTC:
break; /* interpret in normal mode */
case SEQOLD_ECHO:
case SEQOLD_PRIVATE:
case SEQOLD_EXTENDED:
default:
DPRINTF(("seq_to_new: not impl 0x%02x\n", cmd));
return EINVAL;
/* In case new-style events show up */
case SEQ_TIMING:
case SEQ_CHN_VOICE:
case SEQ_CHN_COMMON:
case SEQ_FULLSIZE:
break;
}
return 0;
}
/**********************************************/
void
midiseq_in(struct midi_dev *md, u_char *msg, int len)
{
int unit = md->unit;
seq_event_t ev;
int status, chan;
DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n",
md, msg[0], msg[1], msg[2]));
status = MIDI_GET_STATUS(msg[0]);
chan = MIDI_GET_CHAN(msg[0]);
switch (status) {
case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */
ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan,
.key=msg[1], .velocity=msg[2]);
break;
case MIDI_NOTEOFF:
ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan,
.key=msg[1], .velocity=msg[2]);
break;
case MIDI_KEY_PRESSURE:
ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan,
.key=msg[1], .pressure=msg[2]);
break;
case MIDI_CTL_CHANGE: /* XXX not correct for MSB */
ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan,
.controller=msg[1], .value=msg[2]);
break;
case MIDI_PGM_CHANGE:
ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan,
.program=msg[1]);
break;
case MIDI_CHN_PRESSURE:
ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan,
.pressure=msg[1]);
break;
case MIDI_PITCH_BEND:
ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan,
.value=(msg[1] & 0x7f) | ((msg[2] & 0x7f) << 7));
break;
default: /* this is now the point where MIDI_ACKs disappear */
return;
}
seq_event_intr(md->seq, &ev);
}
static struct midi_dev *
midiseq_open(int unit, int flags)
{
extern struct cfdriver midi_cd;
extern const struct cdevsw midi_cdevsw;
int error;
struct midi_dev *md;
struct midi_softc *sc;
struct midi_info mi;
midi_getinfo(makedev(0, unit), &mi);
if ( !(mi.props & MIDI_PROP_CAN_INPUT) )
flags &= ~FREAD;
if ( 0 == ( flags & ( FREAD | FWRITE ) ) )
return 0;
DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags));
error = (*midi_cdevsw.d_open)(makedev(0, unit), flags, 0, 0);
if (error)
return (0);
sc = midi_cd.cd_devs[unit];
sc->seqopen = 1;
md = malloc(sizeof *md, M_DEVBUF, M_WAITOK|M_ZERO);
sc->seq_md = md;
md->msc = sc;
md->unit = unit;
md->name = mi.name;
md->subtype = 0;
md->nr_voices = 128; /* XXX */
md->instr_bank_size = 128; /* XXX */
if (mi.props & MIDI_PROP_CAN_INPUT)
md->capabilities |= SYNTH_CAP_INPUT;
return (md);
}
static void
midiseq_close(struct midi_dev *md)
{
extern const struct cdevsw midi_cdevsw;
DPRINTFN(2, ("midiseq_close: %d\n", md->unit));
(*midi_cdevsw.d_close)(makedev(0, md->unit), 0, 0, 0);
free(md, M_DEVBUF);
}
static void
midiseq_reset(struct midi_dev *md)
{
/* XXX send GM reset? */
DPRINTFN(3, ("midiseq_reset: %d\n", md->unit));
}
static int
midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk)
{
DPRINTFN(5, ("midiseq_out: m=%p, unit=%d, bf[0]=0x%02x, cc=%d\n",
md->msc, md->unit, bf[0], cc));
/* midi(4) does running status compression where appropriate. */
return midi_writebytes(md->unit, bf, cc);
}
/*
* If the writing process hands us a hidden note-off in a note-on event,
* we will simply write it that way; no need to special case it here,
* as midi(4) will always canonicalize or compress as appropriate anyway.
*/
static int
midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev)
{
return midiseq_out(md, (uint8_t[]){
MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1);
}
static int
midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev)
{
return midiseq_out(md, (uint8_t[]){
MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1);
}
static int
midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev)
{
return midiseq_out(md, (uint8_t[]){
MIDI_KEY_PRESSURE | chan, key,
ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1);
}
static int
midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev)
{
if (ev->c_PGM_CHANGE.program > 127)
return EINVAL;
return midiseq_out(md, (uint8_t[]){
MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1);
}
static int
midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev)
{
if (ev->c_CHN_PRESSURE.pressure > 127)
return EINVAL;
return midiseq_out(md, (uint8_t[]){
MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1);
}
static int
midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev)
{
if (ev->c_CTL_CHANGE.controller > 127)
return EINVAL;
return midiseq_out( md, (uint8_t[]){
MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller,
ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */
}, 3, 1);
}
static int
midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev)
{
return midiseq_out(md, (uint8_t[]){
MIDI_PITCH_BEND | chan,
ev->c_PITCH_BEND.value & 0x7f,
(ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1);
}
static int
midiseq_loadpatch(struct midi_dev *md,
struct sysex_info *sysex, struct uio *uio)
{
u_char c, bf[128];
int i, cc, error;
if (sysex->key != SEQ_SYSEX_PATCH) {
DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n",
sysex->key));
return (EINVAL);
}
if (uio->uio_resid < sysex->len)
/* adjust length, should be an error */
sysex->len = uio->uio_resid;
DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len));
if (sysex->len == 0)
return EINVAL;
error = uiomove(&c, 1, uio);
if (error)
return error;
if (c != MIDI_SYSEX_START) /* must start like this */
return EINVAL;
error = midiseq_out(md, &c, 1, 0);
if (error)
return error;
--sysex->len;
while (sysex->len > 0) {
cc = sysex->len;
if (cc > sizeof bf)
cc = sizeof bf;
error = uiomove(bf, cc, uio);
if (error)
break;
for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++)
;
/*
* XXX midi(4)'s buffer might not accomodate this, and the
* function will not block us (though in this case we have
* a process and could in principle block).
*/
error = midiseq_out(md, bf, i, 0);
if (error)
break;
sysex->len -= i;
if (i != cc)
break;
}
/*
* Any leftover data in uio is rubbish;
* the SYSEX should be one write ending in SYSEX_END.
*/
uio->uio_resid = 0;
c = MIDI_SYSEX_END;
return midiseq_out(md, &c, 1, 0);
}
#include "midi.h"
#if NMIDI == 0
static dev_type_open(midiopen);
static dev_type_close(midiclose);
const struct cdevsw midi_cdevsw = {
midiopen, midiclose, noread, nowrite, noioctl,
nostop, notty, nopoll, nommap,
};
/*
* If someone has a sequencer, but no midi devices there will
* be unresolved references, so we provide little stubs.
*/
int
midi_unit_count()
{
return (0);
}
static int
midiopen(dev_t dev, int flags, int ifmt, struct lwp *l)
{
return (ENXIO);
}
struct cfdriver midi_cd;
void
midi_getinfo(dev_t dev, struct midi_info *mi)
{
mi->name = "Dummy MIDI device";
mi->props = 0;
}
static int
midiclose(dev_t dev, int flags, int ifmt, struct lwp *l)
{
return (ENXIO);
}
int
midi_writebytes(int unit, u_char *bf, int cc)
{
return (ENXIO);
}
#endif /* NMIDI == 0 */
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