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05331bc6d4
freebsd-dev/sys/dev/sound/midi/sequencer.c
Seigo Tanimura 05331bc6d4 - Do not uiomove with a mutex locked. 
- Move from msleep/wakeup to condvar.

- Return either zero or a positive errno value from a function.
  Return additional result via references.

- Unify the typedef of callback functions.
2002-01-01 17:36:26 +00:00

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/*
* The sequencer personality manager.
*
* Copyright by Hannu Savolainen 1993
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*
*/
/*
* This is the newmidi sequencer driver. This driver handles io against
* /dev/sequencer, midi input and output event queues and event transmittion
* to and from a midi device or synthesizer.
*/
#include <dev/sound/midi/midi.h>
#include <dev/sound/midi/sequencer.h>
#ifndef DDB
#define DDB(x)
#endif /* DDB */
#define SND_DEV_SEQ 1 /* Sequencer output /dev/sequencer (FM
synthesizer and MIDI output) */
#define SND_DEV_MIDIN 2 /* Raw midi access */
#define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */
#define MIDIDEV_MODE 0x2000
/* Length of a sequencer event. */
#define EV_SZ 8
#define IEV_SZ 8
/* Return value from seq_playevent and the helpers. */
enum {
MORE,
TIMERARMED,
QUEUEFULL
};
/* Lookup modes */
#define LOOKUP_EXIST (0)
#define LOOKUP_OPEN (1)
#define LOOKUP_CLOSE (2)
/*
* These functions goes into seq_op_desc to get called
* from sound.c.
*/
static midi_intr_t seq_intr;
static midi_callback_t seq_callback;
/* These are the entries to the sequencer driver. */
static d_open_t seq_open;
static d_close_t seq_close;
static d_ioctl_t seq_ioctl;
static d_read_t seq_read;
static d_write_t seq_write;
static d_poll_t seq_poll;
/*
* This is the device descriptor for the midi sequencer.
*/
seqdev_info seq_op_desc = {
"midi sequencer",
0,
seq_open,
seq_close,
seq_read,
seq_write,
seq_ioctl,
seq_poll,
seq_callback,
SEQ_BUFFSIZE, /* Queue Length */
0, /* XXX This is not an *audio* device! */
};
/* Here is the parameter structure per a device. */
struct seq_softc {
seqdev_info *devinfo; /* sequencer device information */
/* Flags (protected by flag_mtx of mididev_info) */
int fflags; /* Access mode */
int queueout_pending; /* Pending for the output queue */
/* Timer counters */
u_long seq_time; /* The beggining time of this sequence */
u_long prev_event_time; /* The time of the previous event output */
u_long prev_input_time; /* The time of the previous event input */
u_long prev_wakeup_time; /* The time of the previous wakeup */
struct callout timeout_ch; /* Timer callout handler */
long timer_current; /* Current timer value */
int timer_running; /* State of timer */
int pending_timer; /* Timer change operation */
int pre_event_timeout; /* Time to wait event input */
/* Device list */
TAILQ_HEAD(,_mididev_info) midi_open; /* Midi devices opened by this sequencer. */
/*
* XXX not sure to which category these belong.
* (and some might be no-op)
*/
int output_threshould; /* Sequence output threshould */
snd_sync_parm sync_parm; /* AIOSYNC parameter set */
struct thread *sync_thread; /* AIOSYNCing thread */
};
typedef struct seq_softc *sc_p;
static d_open_t seqopen;
static d_close_t seqclose;
static d_ioctl_t seqioctl;
static d_read_t seqread;
static d_write_t seqwrite;
static d_poll_t seqpoll;
#define CDEV_MAJOR SEQ_CDEV_MAJOR
static struct cdevsw seq_cdevsw = {
/* open */ seqopen,
/* close */ seqclose,
/* read */ seqread,
/* write */ seqwrite,
/* ioctl */ seqioctl,
/* poll */ seqpoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "midi", /* XXX */
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
};
static TAILQ_HEAD(,_seqdev_info) seq_info;
/* Mutex to protect seq_info and nseq. */
static struct mtx seqinfo_mtx;
static u_long nseq; /* total number of sequencers */
static dev_t seq_alias = NODEV;
/* The followings are the local function. */
static int seq_init(void);
static int seq_initunit(int unit);
static int seq_queue(sc_p scp, u_char *note);
static void seq_startplay(sc_p scp);
static int seq_playevent(sc_p scp, u_char *event);
static u_long seq_gettime(void);
static int seq_requesttimer(sc_p scp, int delay);
static void seq_stoptimer(sc_p scp);
static void seq_midiinput(sc_p scp, mididev_info *md);
static int seq_copytoinput(sc_p scp, u_char *event, int len);
static int seq_extended(sc_p scp, u_char *event);
static int seq_chnvoice(sc_p scp, u_char *event);
static int seq_findvoice(mididev_info *md, int chn, int note) __unused;
static int seq_allocvoice(sc_p scp, mididev_info *md, int chn, int note) __unused;
static int seq_chncommon(sc_p scp, u_char *event);
static int seq_timing(sc_p scp, u_char *event);
static int seq_local(sc_p scp, u_char *event);
static int seq_sysex(sc_p scp, u_char *event);
static void seq_timer(void *arg);
static int seq_reset(sc_p scp);
static int seq_openmidi(sc_p scp, mididev_info *md, int flags, int mode, struct thread *p);
static int seq_closemidi(sc_p scp, mididev_info *md, int flags, int mode, struct thread *p);
static void seq_panic(sc_p scp);
static int seq_sync(sc_p scp);
static seqdev_info *get_seqdev_info(dev_t i_dev, int *unit);
static seqdev_info *get_seqdev_info_unit(int unit);
static seqdev_info *create_seqdev_info_unit(int unit, seqdev_info *seq);
static int lookup_mididev(sc_p scp, int unit, int mode, mididev_info **mdp);
static void seq_clone(void *arg, char *name, int namelen, dev_t *dev);
/*
* Here are the main functions to interact to the user process.
* These are called from snd* functions in sys/i386/isa/snd/sound.c.
*/
static int
seq_init(void)
{
DEB(printf("seq: initing.\n"));
mtx_init(&seqinfo_mtx, "seqinf", MTX_DEF);
TAILQ_INIT(&seq_info);
seq_initunit(0);
EVENTHANDLER_REGISTER(dev_clone, seq_clone, 0, 1000);
DEB(printf("seq: inited.\n"));
return (0);
}
static int
seq_initunit(int unit)
{
sc_p scp;
seqdev_info *devinfo;
dev_t seqdev;
/* Allocate the softc. */
scp = malloc(sizeof(*scp), M_DEVBUF, M_WAITOK | M_ZERO);
if (scp == (sc_p)NULL) {
printf("seq%d: softc allocation failed.\n", unit);
return (1);
}
/* Fill the softc and the seq_info for this unit. */
scp->seq_time = seq_gettime();
scp->prev_event_time = 0;
scp->prev_input_time = 0;
scp->prev_wakeup_time = scp->seq_time;
#if defined(MIDI_OUTOFGIANT)
callout_init(&scp->timeout_ch, 1);
#else
callout_init(&scp->timeout_ch, 0);
#endif /* MIDI_OUTOFGIANT */
scp->timer_current = 0;
scp->timer_running = 0;
scp->queueout_pending = 0;
TAILQ_INIT(&scp->midi_open);
scp->devinfo = devinfo = create_seqdev_info_unit(unit, &seq_op_desc);
devinfo->midi_dbuf_in.unit_size = devinfo->midi_dbuf_out.unit_size = EV_SZ;
devinfo->softc = scp;
devinfo->flags = 0;
mtx_unlock(&devinfo->flagqueue_mtx);
seqdev = make_dev(&seq_cdevsw, MIDIMKMINOR(unit, SND_DEV_SEQ),
UID_ROOT, GID_WHEEL, 0666, "sequencer%d", unit);
mtx_lock(&seqinfo_mtx);
if (seq_alias != NODEV) {
destroy_dev(seq_alias);
seq_alias = NODEV;
}
seq_alias = make_dev_alias(seqdev, "sequencer");
mtx_unlock(&seqinfo_mtx);
return (0);
}
int
seq_open(dev_t i_dev, int flags, int mode, struct thread *td)
{
int unit;
sc_p scp;
seqdev_info *sd;
unit = MIDIUNIT(i_dev);
DEB(printf("seq%d: opening.\n", unit));
if (unit >= NSEQ_MAX) {
DEB(printf("seq_open: unit %d does not exist.\n", unit));
return (ENXIO);
}
sd = get_seqdev_info(i_dev, &unit);
if (sd == NULL) {
DEB(printf("seq_open: unit %d is not configured.\n", unit));
return (ENXIO);
}
scp = sd->softc;
/* Mark this device busy. */
mtx_lock(&sd->flagqueue_mtx);
if ((sd->flags & SEQ_F_BUSY) != 0) {
mtx_unlock(&sd->flagqueue_mtx);
DEB(printf("seq_open: unit %d is busy.\n", unit));
return (EBUSY);
}
sd->flags |= SEQ_F_BUSY;
sd->flags &= ~(SEQ_F_READING | SEQ_F_WRITING);
scp->fflags = flags;
/* Init the queue. */
midibuf_clear(&sd->midi_dbuf_in);
midibuf_clear(&sd->midi_dbuf_out);
/* Init timestamp. */
scp->seq_time = seq_gettime();
scp->prev_event_time = 0;
scp->prev_input_time = 0;
scp->prev_wakeup_time = scp->seq_time;
mtx_unlock(&sd->flagqueue_mtx);
DEB(printf("seq%d: opened.\n", unit));
return (0);
}
int
seq_close(dev_t i_dev, int flags, int mode, struct thread *td)
{
int unit;
sc_p scp;
seqdev_info *sd;
mididev_info *md;
unit = MIDIUNIT(i_dev);
DEB(printf("seq%d: closing.\n", unit));
if (unit >= NSEQ_MAX) {
DEB(printf("seq_close: unit %d does not exist.\n", unit));
return (ENXIO);
}
sd = get_seqdev_info(i_dev, &unit);
if (sd == NULL) {
DEB(printf("seq_close: unit %d is not configured.\n", unit));
return (ENXIO);
}
scp = sd->softc;
mtx_lock(&sd->flagqueue_mtx);
if (!(sd->flags & MIDI_F_NBIO))
seq_sync(scp);
/* Stop the timer. */
seq_stoptimer(scp);
/* Reset the sequencer. */
seq_reset(scp);
seq_sync(scp);
/* Clean up the midi device. */
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq)
lookup_mididev(scp, md->unit, LOOKUP_CLOSE, NULL);
mtx_unlock(&sd->flagqueue_mtx);
/* Stop playing and unmark this device busy. */
mtx_lock(&sd->flagqueue_mtx);
sd->flags &= ~(SEQ_F_BUSY | SEQ_F_READING | SEQ_F_WRITING | SEQ_F_INSYNC);
mtx_unlock(&sd->flagqueue_mtx);
DEB(printf("seq%d: closed.\n", unit));
return (0);
}
int
seq_read(dev_t i_dev, struct uio *buf, int flag)
{
int unit, ret, len, lenr;
sc_p scp;
seqdev_info *sd;
u_char *uiobuf;
unit = MIDIUNIT(i_dev);
/*DEB(printf("seq%d: reading.\n", unit));*/
if (unit >= NSEQ_MAX) {
DEB(printf("seq_read: unit %d does not exist.\n", unit));
return (ENXIO);
}
sd = get_seqdev_info(i_dev, &unit);
if (sd == NULL) {
DEB(printf("seq_read: unit %d is not configured.\n", unit));
return (ENXIO);
}
scp = sd->softc;
if ((scp->fflags & FREAD) == 0) {
DEB(printf("seq_read: unit %d is not for reading.\n", unit));
return (EIO);
}
len = buf->uio_resid;
lenr = 0;
uiobuf = (u_char *)malloc(len, M_DEVBUF, M_WAITOK | M_ZERO);
if (uiobuf == NULL)
return (ENOMEM);
mtx_lock(&sd->flagqueue_mtx);
/* Begin recording. */
if ((sd->flags & SEQ_F_READING) == 0)
sd->callback(sd, SEQ_CB_START | SEQ_CB_RD);
/* Have we got the data to read? */
if ((sd->flags & SEQ_F_NBIO) != 0 && sd->midi_dbuf_in.rl == 0)
ret = EAGAIN;
else
ret = midibuf_seqread(&sd->midi_dbuf_in, uiobuf, len, &lenr,
sd->callback, sd, SEQ_CB_START | SEQ_CB_RD,
&sd->flagqueue_mtx);
mtx_unlock(&sd->flagqueue_mtx);
if (ret == 0 && lenr > 0)
ret = uiomove(uiobuf, lenr, buf);
free(uiobuf, M_DEVBUF);
return (ret);
}
int
seq_write(dev_t i_dev, struct uio *buf, int flag)
{
u_char event[EV_SZ], ev_code;
int unit, count, countorg, midiunit, ev_size, p, ret;
sc_p scp;
seqdev_info *sd;
mididev_info *md;
unit = MIDIUNIT(i_dev);
/*DEB(printf("seq%d: writing.\n", unit));*/
if (unit >= NSEQ_MAX) {
DEB(printf("seq_write: unit %d does not exist.\n", unit));
return (ENXIO);
}
sd = get_seqdev_info(i_dev, &unit);
if (sd == NULL) {
DEB(printf("seq_write: unit %d is not configured.\n", unit));
return (ENXIO);
}
scp = sd->softc;
if ((scp->fflags & FWRITE) == 0) {
DEB(printf("seq_write: unit %d is not for writing.\n", unit));
return (EIO);
}
p = 0;
countorg = buf->uio_resid;
count = countorg;
/* Pick up an event. */
while (count >= 4) {
if (uiomove((caddr_t)event, 4, buf))
printf("seq_write: user memory mangled?\n");
ev_code = event[0];
/* Have a look at the event code. */
if (ev_code == SEQ_FULLSIZE) {
/* A long event, these are the patches/samples for a synthesizer. */
midiunit = *(u_short *)&event[2];
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
return (ret);
DEB(printf("seq_write: loading a patch to the unit %d.\n", midiunit));
ret = md->synth.loadpatch(md, *(short *)&event[0], buf, p + 4, count, 0);
return (ret);
}
if (ev_code >= 128) {
/* Some sort of an extended event. The size is eight bytes. */
#if notyet
if (scp->seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED) {
printf("seq%d: invalid level two event %x.\n", unit, ev_code);
return (EINVAL);
}
#endif /* notyet */
ev_size = 8;
if (count < ev_size) {
/* No more data. Start playing now. */
mtx_lock(&sd->flagqueue_mtx);
if ((sd->flags & SEQ_F_WRITING) == 0)
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
mtx_unlock(&sd->flagqueue_mtx);
return (0);
}
if (uiomove((caddr_t)&event[4], 4, buf))
printf("seq_write: user memory mangled?\n");
} else {
/* Not an extended event. The size is four bytes. */
#if notyet
if (scp->seq_mode == SEQ_2) {
printf("seq%d: four byte event in level two mode.\n", unit);
return (EINVAL);
}
#endif /* notyet */
ev_size = 4;
}
if (ev_code == SEQ_MIDIPUTC) {
/* An event passed to the midi device itself. */
midiunit = event[2];
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
return (ret);
}
/*DEB(printf("seq_write: queueing event %d.\n", event[0]));*/
/* Now we queue the event. */
mtx_lock(&sd->flagqueue_mtx);
switch (seq_queue(scp, event)) {
case EAGAIN:
/* The queue is full. Start playing now. */
if ((sd->flags & SEQ_F_WRITING) == 0)
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
mtx_unlock(&sd->flagqueue_mtx);
return (0);
case EINTR:
mtx_unlock(&sd->flagqueue_mtx);
return (EINTR);
case ERESTART:
mtx_unlock(&sd->flagqueue_mtx);
return (ERESTART);
}
mtx_unlock(&sd->flagqueue_mtx);
p += ev_size;
count -= ev_size;
}
/* We have written every single data. Start playing now. */
mtx_lock(&sd->flagqueue_mtx);
if ((sd->flags & SEQ_F_WRITING) == 0)
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
mtx_unlock(&sd->flagqueue_mtx);
return (0);
}
int
seq_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
{
int unit, midiunit, ret, tmp, arg2;
sc_p scp;
seqdev_info *sd;
mididev_info *md;
struct synth_info *synthinfo;
struct midi_info *midiinfo;
struct patmgr_info *patinfo;
snd_sync_parm *syncparm;
struct seq_event_rec *event;
struct snd_size *sndsize;
unit = MIDIUNIT(i_dev);
DEB(printf("seq%d: ioctlling, cmd 0x%x.\n", unit, (int)cmd));
if (unit >= NSEQ_MAX) {
DEB(printf("seq_ioctl: unit %d does not exist.\n", unit));
return (ENXIO);
}
sd = get_seqdev_info(i_dev, &unit);
if (sd == NULL) {
DEB(printf("seq_ioctl: unit %d is not configured.\n", unit));
return (ENXIO);
}
scp = sd->softc;
ret = 0;
switch (cmd) {
/*
* we start with the new ioctl interface.
*/
case AIONWRITE: /* how many bytes can be written ? */
*(int *)arg = sd->midi_dbuf_out.fl;
break;
case AIOSSIZE: /* set the current blocksize */
sndsize = (struct snd_size *)arg;
mtx_lock(&sd->flagqueue_mtx);
if (sndsize->play_size <= sd->midi_dbuf_out.unit_size && sndsize->rec_size <= sd->midi_dbuf_in.unit_size) {
sd->midi_dbuf_out.blocksize = sd->midi_dbuf_out.unit_size;
sd->midi_dbuf_in.blocksize = sd->midi_dbuf_in.unit_size;
sndsize->play_size = sd->midi_dbuf_out.blocksize;
sndsize->rec_size = sd->midi_dbuf_in.blocksize;
sd->flags &= ~MIDI_F_HAS_SIZE;
mtx_unlock(&sd->flagqueue_mtx);
}
else {
if (sndsize->play_size > sd->midi_dbuf_out.bufsize / 4)
sndsize->play_size = sd->midi_dbuf_out.bufsize / 4;
if (sndsize->rec_size > sd->midi_dbuf_in.bufsize / 4)
sndsize->rec_size = sd->midi_dbuf_in.bufsize / 4;
/* Round up the size to the multiple of EV_SZ. */
sd->midi_dbuf_out.blocksize =
((sndsize->play_size + sd->midi_dbuf_out.unit_size - 1)
/ sd->midi_dbuf_out.unit_size) * sd->midi_dbuf_out.unit_size;
sd->midi_dbuf_in.blocksize =
((sndsize->rec_size + sd->midi_dbuf_in.unit_size - 1)
/ sd->midi_dbuf_in.unit_size) * sd->midi_dbuf_in.unit_size;
sndsize->play_size = sd->midi_dbuf_out.blocksize;
sndsize->rec_size = sd->midi_dbuf_in.blocksize;
sd->flags |= MIDI_F_HAS_SIZE;
mtx_unlock(&sd->flagqueue_mtx);
}
ret = 0;
break;
case AIOGSIZE: /* get the current blocksize */
sndsize = (struct snd_size *)arg;
mtx_lock(&sd->flagqueue_mtx);
sndsize->play_size = sd->midi_dbuf_out.blocksize;
sndsize->rec_size = sd->midi_dbuf_in.blocksize;
mtx_unlock(&sd->flagqueue_mtx);
ret = 0;
break;
case AIOSTOP:
if (*(int *)arg == AIOSYNC_PLAY) {
/* Stop writing. */
mtx_lock(&sd->flagqueue_mtx);
sd->callback(sd, SEQ_CB_ABORT | SEQ_CB_WR);
mtx_unlock(&sd->flagqueue_mtx);
/* Pass the ioctl to the midi devices. */
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq) {
if ((md->flags & MIDI_F_WRITING) != 0) {
arg2 = *(int *)arg;
midi_ioctl(MIDIMKDEV(major(i_dev), md->unit, SND_DEV_MIDIN), cmd, (caddr_t)&arg2, mode, td);
}
}
*(int *)arg = sd->midi_dbuf_out.rl;
}
else if (*(int *)arg == AIOSYNC_CAPTURE) {
/* Stop reading. */
mtx_lock(&sd->flagqueue_mtx);
sd->callback(sd, SEQ_CB_ABORT | SEQ_CB_RD);
mtx_unlock(&sd->flagqueue_mtx);
/* Pass the ioctl to the midi devices. */
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq) {
if ((md->flags & MIDI_F_WRITING) != 0) {
arg2 = *(int *)arg;
midi_ioctl(MIDIMKDEV(major(i_dev), md->unit, SND_DEV_MIDIN), cmd, (caddr_t)&arg2, mode, td);
}
}
*(int *)arg = sd->midi_dbuf_in.rl;
}
ret = 0;
break;
case AIOSYNC:
syncparm = (snd_sync_parm *)arg;
scp->sync_parm = *syncparm;
/* XXX Should select(2) against us watch the blocksize, or sync_parm? */
ret = 0;
break;
case SNDCTL_TMR_TIMEBASE:
case SNDCTL_TMR_TEMPO:
case SNDCTL_TMR_START:
case SNDCTL_TMR_STOP:
case SNDCTL_TMR_CONTINUE:
case SNDCTL_TMR_METRONOME:
case SNDCTL_TMR_SOURCE:
#if notyet
if (scp->seq_mode != SEQ_2) {
ret = EINVAL;
break;
}
ret = tmr->ioctl(tmr_no, cmd, arg);
#endif /* notyet */
break;
case SNDCTL_TMR_SELECT:
#if notyet
if (scp->seq_mode != SEQ_2) {
ret = EINVAL;
break;
}
#endif /* notyet */
scp->pending_timer = *(int *)arg;
if (scp->pending_timer < 0 || scp->pending_timer >= /*NTIMER*/1) {
scp->pending_timer = -1;
ret = EINVAL;
break;
}
*(int *)arg = scp->pending_timer;
ret = 0;
break;
case SNDCTL_SEQ_PANIC:
mtx_lock(&scp->devinfo->flagqueue_mtx);
seq_panic(scp);
mtx_unlock(&scp->devinfo->flagqueue_mtx);
ret = 0;
break;
case SNDCTL_SEQ_SYNC:
if (mode == O_RDONLY) {
ret = 0;
break;
}
mtx_lock(&scp->devinfo->flagqueue_mtx);
ret = seq_sync(scp);
mtx_unlock(&scp->devinfo->flagqueue_mtx);
break;
case SNDCTL_SEQ_RESET:
mtx_lock(&scp->devinfo->flagqueue_mtx);
seq_reset(scp);
mtx_unlock(&scp->devinfo->flagqueue_mtx);
ret = 0;
break;
case SNDCTL_SEQ_TESTMIDI:
midiunit = *(int *)arg;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
break;
case SNDCTL_SEQ_GETINCOUNT:
if (mode == O_WRONLY)
*(int *)arg = 0;
else
*(int *)arg = sd->midi_dbuf_in.rl;
ret = 0;
break;
case SNDCTL_SEQ_GETOUTCOUNT:
if (mode == O_RDONLY)
*(int *)arg = 0;
else
*(int *)arg = sd->midi_dbuf_out.fl;
ret = 0;
break;
case SNDCTL_SEQ_CTRLRATE:
#if notyet
if (scp->seq_mode != SEQ_2) {
ret = tmr->ioctl(tmr_no, cmd, arg);
break;
}
#endif /* notyet */
if (*(int *)arg != 0) {
ret = EINVAL;
break;
}
*(int *)arg = hz;
ret = 0;
break;
case SNDCTL_SEQ_RESETSAMPLES:
midiunit = *(int *)arg;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), midiunit, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
case SNDCTL_SEQ_NRSYNTHS:
*(int *)arg = mididev_info_number();
ret = 0;
break;
case SNDCTL_SEQ_NRMIDIS:
*(int *)arg = mididev_info_number();
ret = 0;
break;
case SNDCTL_SYNTH_MEMAVL:
midiunit = *(int *)arg;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), midiunit, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
case SNDCTL_FM_4OP_ENABLE:
midiunit = *(int *)arg;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), midiunit, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
case SNDCTL_SYNTH_INFO:
synthinfo = (struct synth_info *)arg;
midiunit = synthinfo->device;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), midiunit, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
case SNDCTL_SEQ_OUTOFBAND:
event = (struct seq_event_rec *)arg;
mtx_lock(&sd->flagqueue_mtx);
ret = seq_playevent(scp, event->arr);
mtx_unlock(&sd->flagqueue_mtx);
break;
case SNDCTL_MIDI_INFO:
midiinfo = (struct midi_info *)arg;
midiunit = midiinfo->device;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), midiunit, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
case SNDCTL_PMGR_IFACE:
patinfo = (struct patmgr_info *)arg;
midiunit = patinfo->device;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), midiunit, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
case SNDCTL_PMGR_ACCESS:
patinfo = (struct patmgr_info *)arg;
midiunit = patinfo->device;
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, midiunit, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), midiunit, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
case SNDCTL_SEQ_THRESHOLD:
tmp = *(int *)arg;
RANGE(tmp, 1, sd->midi_dbuf_out.bufsize - 1);
scp->output_threshould = tmp;
ret = 0;
break;
case SNDCTL_MIDI_PRETIME:
tmp = *(int *)arg;
if (tmp < 0)
tmp = 0;
tmp = (hz * tmp) / 10;
scp->pre_event_timeout = tmp;
ret = 0;
break;
default:
if (scp->fflags == O_RDONLY) {
ret = EIO;
break;
}
mtx_lock(&sd->flagqueue_mtx);
ret = lookup_mididev(scp, 0, LOOKUP_OPEN, &md);
mtx_unlock(&sd->flagqueue_mtx);
if (ret != 0)
break;
ret = midi_ioctl(MIDIMKDEV(major(i_dev), 0, SND_DEV_MIDIN), cmd, arg, mode, td);
break;
}
return (ret);
}
int
seq_poll(dev_t i_dev, int events, struct thread *td)
{
int unit, ret, lim;
sc_p scp;
seqdev_info *sd;
unit = MIDIUNIT(i_dev);
DEB(printf("seq%d: polling.\n", unit));
if (unit >= NSEQ_MAX) {
DEB(printf("seq_poll: unit %d does not exist.\n", unit));
return (ENXIO);
}
sd = get_seqdev_info(i_dev, &unit);
if (sd == NULL) {
DEB(printf("seq_poll: unit %d is not configured.\n", unit));
return (ENXIO);
}
scp = sd->softc;
mtx_lock(&sd->flagqueue_mtx);
ret = 0;
/* Look up the apropriate queue and select it. */
if ((events & (POLLOUT | POLLWRNORM)) != 0) {
/* Start playing. */
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
/* Find out the boundary. */
if ((sd->flags & SEQ_F_HAS_SIZE) != 0)
lim = sd->midi_dbuf_out.blocksize;
else
lim = sd->midi_dbuf_out.unit_size;
if (sd->midi_dbuf_out.fl < lim)
/* No enough space, record select. */
selrecord(td, &sd->midi_dbuf_out.sel);
else
/* We can write now. */
ret |= events & (POLLOUT | POLLWRNORM);
}
if ((events & (POLLIN | POLLRDNORM)) != 0) {
/* Start recording. */
sd->callback(sd, SEQ_CB_START | SEQ_CB_RD);
/* Find out the boundary. */
if ((sd->flags & SEQ_F_HAS_SIZE) != 0)
lim = sd->midi_dbuf_in.blocksize;
else
lim = sd->midi_dbuf_in.unit_size;
if (sd->midi_dbuf_in.rl < lim)
/* No data ready, record select. */
selrecord(td, &sd->midi_dbuf_in.sel);
else
/* We can write now. */
ret |= events & (POLLIN | POLLRDNORM);
}
mtx_unlock(&sd->flagqueue_mtx);
return (ret);
}
static void
seq_intr(void *p, mididev_info *md)
{
sc_p scp;
seqdev_info *sd;
sd = (seqdev_info *)p;
scp = sd->softc;
mtx_lock(&sd->flagqueue_mtx);
/* Restart playing if we have the data to output. */
if (scp->queueout_pending)
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
/* Check the midi device if we are reading. */
if ((sd->flags & SEQ_F_READING) != 0)
seq_midiinput(scp, md);
mtx_unlock(&sd->flagqueue_mtx);
}
static int
seq_callback(void *d, int reason)
{
int unit;
sc_p scp;
seqdev_info *sd;
sd = (seqdev_info *)d;
/*DEB(printf("seq_callback: reason 0x%x.\n", reason));*/
if (sd == NULL) {
DEB(printf("seq_callback: device not configured.\n"));
return (ENXIO);
}
scp = sd->softc;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
switch (reason & SEQ_CB_REASON_MASK) {
case SEQ_CB_START:
if ((reason & SEQ_CB_RD) != 0 && (sd->flags & SEQ_F_READING) == 0)
/* Begin recording. */
sd->flags |= SEQ_F_READING;
if ((reason & SEQ_CB_WR) != 0 && (sd->flags & SEQ_F_WRITING) == 0)
/* Start playing. */
seq_startplay(scp);
break;
case SEQ_CB_STOP:
case SEQ_CB_ABORT:
if ((reason & SEQ_CB_RD) != 0 && (sd->flags & SEQ_F_READING) != 0) {
/* Stop recording. */
sd->flags &= ~SEQ_F_READING;
scp->seq_time = seq_gettime();
scp->prev_input_time = 0;
}
if ((reason & SEQ_CB_WR) != 0 && (sd->flags & SEQ_F_WRITING) != 0) {
/* Stop Playing. */
sd->flags &= ~SEQ_F_WRITING;
scp->queueout_pending = 0;
scp->seq_time = seq_gettime();
scp->prev_input_time = 0;
/* Stop the timer. */
seq_stoptimer(scp);
}
}
return (0);
}
/*
* The functions below here are the libraries for the above ones.
*/
static int
seq_queue(sc_p scp, u_char *note)
{
int unit, err, lenw;
seqdev_info *sd;
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
/*DEB(printf("seq%d: queueing.\n", unit));*/
if ((sd->flags & SEQ_F_INSYNC) != 0)
cv_wait(&sd->insync_cv, &sd->flagqueue_mtx);
if (sd->midi_dbuf_out.fl < EV_SZ) {
/* We have no space. Start playing if not yet. */
if ((sd->flags & SEQ_F_WRITING) == 0)
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
if ((sd->flags & SEQ_F_NBIO) != 0 && sd->midi_dbuf_out.fl < EV_SZ)
/* We would block. */
return (EAGAIN);
}
/* Write to the queue. */
err = midibuf_seqwrite(&sd->midi_dbuf_out, note, EV_SZ, &lenw,
sd->callback, sd, SEQ_CB_START | SEQ_CB_WR,
&sd->flagqueue_mtx);
if (err == 0) {
/* Start playing if we have some data in the queue. */
if (sd->midi_dbuf_out.rl >= EV_SZ && ((sd->flags & SEQ_F_WRITING) == 0))
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
}
return (err);
}
static void
seq_startplay(sc_p scp)
{
int unit, lenr;
u_char event[EV_SZ];
seqdev_info *sd;
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
sd->flags |= SEQ_F_WRITING;
/* Dequeue the events to play. */
while (sd->midi_dbuf_out.rl >= EV_SZ) {
midibuf_seqcopy(&sd->midi_dbuf_out, event, EV_SZ, &lenr,
NULL, NULL, 0,
&sd->flagqueue_mtx);
switch (seq_playevent(scp, event)) {
case TIMERARMED:
midibuf_seqdelete(&sd->midi_dbuf_out, EV_SZ, &lenr,
NULL, NULL, 0,
&sd->flagqueue_mtx);
return;
case QUEUEFULL:
/* We cannot play any further. */
return;
case MORE:
midibuf_seqdelete(&sd->midi_dbuf_out, EV_SZ, &lenr,
NULL, NULL, 0,
&sd->flagqueue_mtx);
break;
}
}
/* Played every event in the queue. */
sd->flags &= ~SEQ_F_WRITING;
}
static int
seq_playevent(sc_p scp, u_char *event)
{
int unit, ret, lenw;
long *delay;
seqdev_info *sd;
mididev_info *md;
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
ret = lookup_mididev(scp, 0, LOOKUP_OPEN, &md);
if (ret != 0)
return (MORE);
switch(event[0]) {
case SEQ_NOTEOFF:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.killnote(md, event[1], 255, event[3]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
ret = QUEUEFULL;
break;
}
mtx_lock(&sd->flagqueue_mtx);
ret = MORE;
break;
case SEQ_NOTEON:
mtx_unlock(&sd->flagqueue_mtx);
if ((event[4] < 128 || event[4] == 255) && md->synth.startnote(md, event[1], event[2], event[3]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
ret = QUEUEFULL;
break;
}
mtx_lock(&sd->flagqueue_mtx);
ret = MORE;
break;
case SEQ_WAIT:
/* Extract the delay. */
delay = (long *)event;
*delay = (*delay >> 8) & 0xffffff;
if (*delay > 0) {
/* Arm the timer. */
sd->flags |= SEQ_F_WRITING;
if (seq_requesttimer(scp, *delay)) {
ret = TIMERARMED;
break;
}
}
ret = MORE;
break;
case SEQ_PGMCHANGE:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.setinstr(md, event[1], event[2]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
ret = QUEUEFULL;
break;
}
mtx_lock(&sd->flagqueue_mtx);
ret = MORE;
break;
case SEQ_SYNCTIMER:
/* Reset the timer. */
scp->seq_time = seq_gettime();
scp->prev_input_time = 0;
scp->prev_event_time = 0;
scp->prev_wakeup_time = scp->seq_time;
ret = MORE;
break;
case SEQ_MIDIPUTC:
/* Pass through to the midi device. */
ret = lookup_mididev(scp, event[2], LOOKUP_OPEN, &md);
if (ret != 0) {
ret = MORE;
break;
}
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.writeraw(md, &event[1], sizeof(event[1]), &lenw, 1) == EAGAIN)
/* The queue was full. Try again later. */
ret = QUEUEFULL;
else
ret = MORE;
mtx_lock(&sd->flagqueue_mtx);
break;
case SEQ_ECHO:
/* Echo this event back. */
if (seq_copytoinput(scp, event, 4) == EAGAIN) {
ret = QUEUEFULL;
break;
}
ret = MORE;
break;
case SEQ_PRIVATE:
ret = lookup_mididev(scp, event[1], LOOKUP_OPEN, &md);
if (ret != 0) {
ret = MORE;
break;
}
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.hwcontrol(md, event) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
ret = QUEUEFULL;
break;
}
mtx_lock(&sd->flagqueue_mtx);
ret = MORE;
break;
case SEQ_EXTENDED:
ret = seq_extended(scp, event);
break;
case EV_CHN_VOICE:
ret = seq_chnvoice(scp, event);
break;
case EV_CHN_COMMON:
ret = seq_chncommon(scp, event);
break;
case EV_TIMING:
ret = seq_timing(scp, event);
break;
case EV_SEQ_LOCAL:
ret = seq_local(scp, event);
break;
case EV_SYSEX:
ret = seq_sysex(scp, event);
break;
default:
ret = MORE;
break;
}
switch (ret) {
case QUEUEFULL:
/*DEB(printf("seq_playevent: the queue is full.\n"));*/
/* The queue was full. Try again on the interrupt by the midi device. */
sd->flags |= SEQ_F_WRITING;
scp->queueout_pending = 1;
break;
case TIMERARMED:
sd->flags |= SEQ_F_WRITING;
/* FALLTHRU */
case MORE:
scp->queueout_pending = 0;
break;
}
return (ret);
}
static u_long
seq_gettime(void)
{
struct timeval timecopy;
getmicrotime(&timecopy);
return timecopy.tv_usec / (1000000 / hz) + (u_long) timecopy.tv_sec * hz;
}
static int
seq_requesttimer(sc_p scp, int delay)
{
u_long cur_time, rel_base;
/*DEB(printf("seq%d: requested timer at delay of %d.\n", unit, delay));*/
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
cur_time = seq_gettime();
scp->prev_event_time = delay;
if (delay < 0)
/* Request a new timer. */
delay = -delay;
else {
rel_base = cur_time - scp->seq_time;
if (delay <= rel_base) {
seq_stoptimer(scp);
return 0;
}
delay -= rel_base;
}
#if notdef
/*
* Compensate the delay of midi message transmission.
* XXX Do we have to consider the accumulation of errors
* less than 1/hz second?
*/
delay -= (cur_time - scp->prev_wakeup_time);
if (delay < 1) {
printf("sequencer: prev = %lu, cur = %lu, delay = %d, skip sleeping.\n",
scp->prev_wakeup_time, cur_time, delay);
seq_stoptimer(scp);
return 0;
}
#endif /* notdef */
callout_reset(&scp->timeout_ch, delay, seq_timer, (void *)scp);
scp->timer_running = 1;
return 1;
}
static void
seq_stoptimer(sc_p scp)
{
/*DEB(printf("seq%d: stopping timer.\n", unit));*/
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
if (scp->timer_running) {
callout_stop(&scp->timeout_ch);
scp->timer_running = 0;
}
}
static void
seq_midiinput(sc_p scp, mididev_info *md)
{
int unit, midiunit, lenr;
u_long tstamp;
u_char event[4];
seqdev_info *sd;
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
sd = scp->devinfo;
unit = sd->unit;
/* Can this midi device interrupt for input? */
midiunit = md->unit;
if (lookup_mididev(scp, midiunit, LOOKUP_EXIST, NULL) != 0)
return;
if ((md->flags & MIDI_F_READING) != 0 && md->intrarg == sd) {
/* Read the input data. */
while (md->synth.readraw(md, &event[1], sizeof(event[1]), &lenr, 1) == 0) {
tstamp = seq_gettime() - scp->seq_time;
if (tstamp != scp->prev_input_time) {
/* Insert a wait between events. */
tstamp = (tstamp << 8) | SEQ_WAIT;
seq_copytoinput(scp, (u_char *)&tstamp, 4);
scp->prev_input_time = tstamp;
}
event[0] = SEQ_MIDIPUTC;
event[2] = midiunit;
event[3] = 0;
seq_copytoinput(scp, event, sizeof(event));
}
}
}
static int
seq_copytoinput(sc_p scp, u_char *event, int len)
{
int ret, leni;
seqdev_info *sd;
sd = scp->devinfo;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
ret = midibuf_input_intr(&sd->midi_dbuf_in, event, len, &leni);
return (ret);
}
static int
seq_extended(sc_p scp, u_char *event)
{
int unit;
seqdev_info *sd;
mididev_info *md;
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
if (lookup_mididev(scp, event[2], LOOKUP_OPEN, &md) != 0)
return (MORE);
switch (event[1]) {
case SEQ_NOTEOFF:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.killnote(md, event[3], event[4], event[5]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
case SEQ_NOTEON:
mtx_unlock(&sd->flagqueue_mtx);
if ((event[4] < 128 || event[4] == 255) && md->synth.startnote(md, event[3], event[4], event[5]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
case SEQ_PGMCHANGE:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.setinstr(md, event[3], event[4]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
case SEQ_AFTERTOUCH:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.aftertouch(md, event[3], event[4]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
case SEQ_BALANCE:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.panning(md, event[3], (char)event[4]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
case SEQ_CONTROLLER:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.controller(md, event[3], event[4], *(short *)&event[5]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
case SEQ_VOLMODE:
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.volumemethod != NULL && md->synth.volumemethod(md, event[3]) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
}
return (MORE);
}
static int
seq_chnvoice(sc_p scp, u_char *event)
{
int voice;
seqdev_info *sd;
mididev_info *md;
u_char dev, cmd, chn, note, parm;
voice = -1;
dev = event[1];
cmd = event[2];
chn = event[3];
note = event[4];
parm = event[5];
sd = scp->devinfo;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
if (lookup_mididev(scp, dev, LOOKUP_OPEN, &md) != 0)
return (MORE);
#if notyet
if (scp->seq_mode == SEQ_2 && md->synth.allocvoice != NULL)
voice = seq_allocvoice(scp, md, chn, note);
#endif /* notyet */
switch (cmd) {
case MIDI_NOTEON:
if (note < 128 || note == 255) {
#if notyet
if (voice == -1 && scp->seq_mode == SEQ_2 && md->synth.allocvoice)
/* This is an internal synthesizer. (FM, GUS, etc) */
if ((voice = seq_allocvoice(scp, md, chn, note)) == EAGAIN)
return (QUEUEFULL);
#endif /* notyet */
if (voice == -1)
voice = chn;
#if notyet
if (scp->seq_mode == SEQ_2 && chn == 9) {
/* This channel is a percussion. The note number is the patch number. */
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.setinstr(md, voice, 128 + note) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
note = 60; /* Middle C. */
}
if (scp->seq_mode == SEQ_2) {
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.setupvoice(md, voice, chn) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
}
#endif /* notyet */
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.startnote(md, voice, note, parm) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
}
break;
case MIDI_NOTEOFF:
if (voice == -1)
voice = chn;
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.killnote(md, voice, note, parm) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
case MIDI_KEY_PRESSURE:
if (voice == -1)
voice = chn;
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.aftertouch(md, voice, parm) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
break;
}
return (MORE);
}
static int
seq_findvoice(mididev_info *md, int chn, int note)
{
int i;
u_short key;
key = (chn << 8) | (note + 1);
mtx_lock(&md->synth.vc_mtx);
for (i = 0 ; i < md->synth.alloc.max_voice ; i++)
if (md->synth.alloc.map[i] == key) {
mtx_unlock(&md->synth.vc_mtx);
return (i);
}
mtx_unlock(&md->synth.vc_mtx);
return (-1);
}
static int
seq_allocvoice(sc_p scp, mididev_info *md, int chn, int note)
{
int voice;
u_short key;
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
key = (chn << 8) | (note + 1);
mtx_unlock(&scp->devinfo->flagqueue_mtx);
if ((voice = md->synth.allocvoice(md, chn, note, &md->synth.alloc)) == EAGAIN) {
mtx_lock(&scp->devinfo->flagqueue_mtx);
return (EAGAIN);
}
mtx_lock(&scp->devinfo->flagqueue_mtx);
mtx_lock(&md->synth.vc_mtx);
md->synth.alloc.map[voice] = key;
md->synth.alloc.alloc_times[voice] = md->synth.alloc.timestamp++;
mtx_unlock(&md->synth.vc_mtx);
return (voice);
}
static int
seq_chncommon(sc_p scp, u_char *event)
{
int unit/*, i, val, key*/;
u_short w14;
u_char dev, cmd, chn, p1;
seqdev_info *sd;
mididev_info *md;
dev = event[1];
cmd = event[2];
chn = event[3];
p1 = event[4];
w14 = *(u_short *)&event[6];
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
if (lookup_mididev(scp, dev, LOOKUP_OPEN, &md) != 0)
return (MORE);
switch (cmd) {
case MIDI_PGM_CHANGE:
#if notyet
if (scp->seq_mode == SEQ_2) {
mtx_lock(&md->synth.vc_mtx);
md->synth.chn_info[chn].pgm_num = p1;
mtx_unlock(&md->synth.vc_mtx);
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.setinstr(md, chn, p1) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
} else {
#endif /* notyet */
/* For Mode 1. */
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.setinstr(md, chn, p1) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
#if notyet
}
#endif /* notyet */
break;
case MIDI_CTL_CHANGE:
/* mtx_lock(&md->giant); */
#if notyet
if (scp->seq_mode == SEQ_2) {
if (chn < 16 && p1 < 128) {
mtx_lock(&md->synth.vc_mtx);
md->synth.chn_info[chn].controllers[p1] = w14 & 0x7f;
if (p1 < 32)
/* We have set the MSB, clear the LSB. */
md->synth.chn_info[chn].controllers[p1 + 32] = 0;
val = w14 & 0x7f;
if (p1 < 64) {
/* Combine the MSB and the LSB. */
val = ((md->synth.chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
| (md->synth.chn_info[chn].controllers[p1 | 32] & 0x7f);
p1 &= ~32;
}
/* Handle all of the notes playing on this channel. */
key = ((int)chn << 8);
for (i = 0 ; i < md->synth.alloc.max_voice ; i++)
if ((md->synth.alloc.map[i] & 0xff00) == key) {
mtx_unlock(&md->synth.vc_mtx);
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.controller(md, i, p1, val) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
mtx_lock(&md->synth.vc_mtx);
}
mtx_unlock(&md->synth.vc_mtx);
}
} else {
#endif /* notyet */
/* For Mode 1. */
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.controller(md, chn, p1, w14) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
#if notyet
}
#endif /* notyet */
break;
case MIDI_PITCH_BEND:
#if notyet
if (scp->seq_mode == SEQ_2) {
mtx_lock(&md->synth.vc_mtx);
md->synth.chn_info[chn].bender_value = w14;
/* Handle all of the notes playing on this channel. */
key = ((int)chn << 8);
for (i = 0 ; i < md->synth.alloc.max_voice ; i++)
if ((md->synth.alloc.map[i] & 0xff00) == key) {
mtx_unlock(&md->synth.vc_mtx);
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.bender(md, i, w14) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
mtx_lock(&md->synth.vc_mtx);
}
mtx_unlock(&md->synth.vc_mtx);
} else {
#endif /* notyet */
/* For Mode 1. */
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.bender(md, chn, w14) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
#if notyet
}
#endif /* notyet */
break;
}
return (MORE);
}
static int
seq_timing(sc_p scp, u_char *event)
{
int unit/*, ret*/;
long parm;
seqdev_info *sd;
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
parm = *(long *)&event[4];
#if notyet
if (scp->seq_mode == SEQ_2 && (ret = tmr->event(tmr_no, event)) == TIMERARMED)
return (ret);
#endif /* notyet */
switch (event[1]) {
case TMR_WAIT_REL:
parm += scp->prev_event_time;
/* FALLTHRU */
case TMR_WAIT_ABS:
if (parm > 0) {
sd->flags |= SEQ_F_WRITING;
if (seq_requesttimer(scp, parm))
return (TIMERARMED);
}
break;
case TMR_START:
scp->seq_time = seq_gettime();
scp->prev_input_time = 0;
scp->prev_event_time = 0;
scp->prev_wakeup_time = scp->seq_time;
break;
case TMR_STOP:
break;
case TMR_CONTINUE:
break;
case TMR_TEMPO:
break;
case TMR_ECHO:
#if notyet
if (scp->seq_mode == SEQ_2)
seq_copytoinput(scp, event, 8);
else {
#endif /* notyet */
parm = (parm << 8 | SEQ_ECHO);
seq_copytoinput(scp, (u_char *)&parm, 4);
#if notyet
}
#endif /* notyet */
break;
}
return (MORE);
}
static int
seq_local(sc_p scp, u_char *event)
{
int unit;
seqdev_info *sd;
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
switch (event[1]) {
case LOCL_STARTAUDIO:
#if notyet
DMAbuf_start_devices(*(u_int *)&event[4]);
#endif /* notyet */
break;
}
return (MORE);
}
static int
seq_sysex(sc_p scp, u_char *event)
{
int unit, i, l;
seqdev_info *sd;
mididev_info *md;
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
if (lookup_mididev(scp, event[1], LOOKUP_OPEN, &md) != 0)
return (MORE);
l = 0;
for (i = 0 ; i < 6 && event[i + 2] != 0xff ; i++)
l = i + 1;
if (l > 0) {
mtx_unlock(&sd->flagqueue_mtx);
if (md->synth.sendsysex(md, &event[2], l) == EAGAIN) {
mtx_lock(&sd->flagqueue_mtx);
return (QUEUEFULL);
}
mtx_lock(&sd->flagqueue_mtx);
}
return (MORE);
}
static void
seq_timer(void *arg)
{
sc_p scp;
seqdev_info *sd;
scp = arg;
sd = scp->devinfo;
/*DEB(printf("seq_timer: timer fired.\n"));*/
/* Record the current timestamp. */
mtx_lock(&sd->flagqueue_mtx);
scp->timer_running = 0;
scp->prev_wakeup_time = seq_gettime();
seq_startplay(scp);
mtx_unlock(&sd->flagqueue_mtx);
}
static int
seq_openmidi(sc_p scp, mididev_info *md, int flags, int mode, struct thread *td)
{
int midiunit, err, insync;
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
midiunit = md->unit;
DEB(printf("seq_openmidi: opening midi unit %d.\n", midiunit));
err = midi_open(MIDIMKDEV(MIDI_CDEV_MAJOR, midiunit, SND_DEV_MIDIN), flags, mode, td);
if (err != 0) {
printf("seq_openmidi: failed to open midi device %d.\n", midiunit);
return (err);
}
mtx_lock(&md->synth.status_mtx);
mtx_lock(&md->flagqueue_mtx);
md->intr = seq_intr;
md->intrarg = scp->devinfo;
mtx_unlock(&md->flagqueue_mtx);
md->synth.sysex_state = 0;
mtx_unlock(&md->synth.status_mtx);
insync = 0;
if ((scp->devinfo->flags & SEQ_F_INSYNC) != 0) {
insync = 1;
cv_wait(&scp->devinfo->insync_cv, &scp->devinfo->flagqueue_mtx);
}
TAILQ_INSERT_TAIL(&scp->midi_open, md, md_linkseq);
if (insync)
cv_broadcast(&scp->devinfo->insync_cv);
return (0);
}
static int
seq_closemidi(sc_p scp, mididev_info *md, int flags, int mode, struct thread *td)
{
int midiunit, insync;
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
if (md == NULL || !MIDICONFED(md)) {
DEB(printf("seq_closemidi: midi device does not exist.\n"));
return (ENXIO);
}
midiunit = md->unit;
DEB(printf("seq_closemidi: closing midi unit %d.\n", midiunit));
midi_close(MIDIMKDEV(MIDI_CDEV_MAJOR, midiunit, SND_DEV_MIDIN), flags, mode, td);
mtx_lock(&md->flagqueue_mtx);
md->intr = NULL;
md->intrarg = NULL;
mtx_unlock(&md->flagqueue_mtx);
insync = 0;
if ((scp->devinfo->flags & SEQ_F_INSYNC) != 0) {
insync = 1;
cv_wait(&scp->devinfo->insync_cv, &scp->devinfo->flagqueue_mtx);
}
TAILQ_REMOVE(&scp->midi_open, md, md_linkseq);
if (insync)
cv_broadcast(&scp->devinfo->insync_cv);
return (0);
}
static void
seq_panic(sc_p scp)
{
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
seq_reset(scp);
}
static int
seq_reset(sc_p scp)
{
int unit, chn, lenw;
seqdev_info *sd;
mididev_info *md;
u_char c[3];
sd = scp->devinfo;
unit = sd->unit;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
if ((sd->flags & SEQ_F_INSYNC) != 0)
cv_wait(&sd->insync_cv, &sd->flagqueue_mtx);
/* Stop reading and writing. */
sd->callback(sd, SEQ_CB_ABORT | SEQ_CB_RD | SEQ_CB_WR);
/* Clear the queues. */
midibuf_clear(&sd->midi_dbuf_in);
midibuf_clear(&sd->midi_dbuf_out);
#if notyet
/* Reset the synthesizers. */
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq)
md->synth.reset(md);
#endif /* notyet */
#if notyet
if (scp->seq_mode == SEQ_2) {
for (chn = 0 ; chn < 16 ; chn++) {
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq) {
if (md->synth.controller(md, chn, 123, 0) == EAGAIN /* All notes off. */
|| md->synth.controller(md, chn, 121, 0) == EAGAIN /* Reset all controllers. */
|| md->synth.bender(md, chn, 1 << 13) == EAGAIN) /* Reset pitch bend. */
return (EAGAIN);
}
}
} else {
#endif /* notyet */
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq) {
for (chn = 0 ; chn < 16 ; chn++) {
c[0] = 0xb0 | (chn & 0x0f);
c[1] = (u_char)0x78; /* All sound off */
c[2] = (u_char)0;
md->synth.writeraw(md, c, 3, &lenw, 0);
c[1] = (u_char)0x7b; /* All note off */
md->synth.writeraw(md, c, 3, &lenw, 0);
c[1] = (u_char)0x79; /* Reset all controller */
md->synth.writeraw(md, c, 3, &lenw, 0);
}
}
seq_sync(scp);
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq)
lookup_mididev(scp, md->unit, LOOKUP_CLOSE, NULL);
#if notyet
}
#endif /* notyet */
return (0);
}
#define SEQ_SYNC_TIMEOUT 8
static int
seq_sync(sc_p scp)
{
int i, rl;
seqdev_info *sd;
mididev_info *md;
sd = scp->devinfo;
mtx_assert(&sd->flagqueue_mtx, MA_OWNED);
sd->flags |= SEQ_F_INSYNC;
while (sd->midi_dbuf_out.rl >= EV_SZ) {
if ((sd->flags & SEQ_F_WRITING) == 0)
sd->callback(sd, SEQ_CB_START | SEQ_CB_WR);
rl = sd->midi_dbuf_out.rl;
i = cv_timedwait_sig(&sd->midi_dbuf_out.cv_out, &sd->flagqueue_mtx, SEQ_SYNC_TIMEOUT * hz);
if (i == EINTR || i == ERESTART) {
if (i == EINTR)
sd->callback(sd, SEQ_CB_STOP | SEQ_CB_WR);
sd->flags &= ~SEQ_F_INSYNC;
return (i);
}
if (i == EWOULDBLOCK && rl == sd->midi_dbuf_out.rl && !scp->timer_running) {
/* A queue seems to be stuck up. Give up and clear queues. */
sd->callback(sd, SEQ_CB_STOP | SEQ_CB_WR);
midibuf_clear(&sd->midi_dbuf_out);
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq) {
mtx_lock(&md->flagqueue_mtx);
md->callback(md, MIDI_CB_ABORT | MIDI_CB_WR);
midibuf_clear(&md->midi_dbuf_out);
mtx_unlock(&md->flagqueue_mtx);
}
break;
}
}
/*
* Since syncing a midi device might block, unlock sd->flagqueue_mtx.
* Keep sd->midi_dbuf_out from writing by setting SEQ_F_INSYNC.
* sd->insync_cv is signalled when sync is finished.
*/
mtx_unlock(&sd->flagqueue_mtx);
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq) {
mtx_lock(&md->flagqueue_mtx);
midi_sync(md);
mtx_unlock(&md->flagqueue_mtx);
}
mtx_lock(&sd->flagqueue_mtx);
sd->flags &= ~SEQ_F_INSYNC;
cv_broadcast(&sd->insync_cv);
return (0);
}
/*
* a small utility function which, given a device number, returns
* a pointer to the associated seqdev_info struct, and sets the unit
* number.
*/
static seqdev_info *
get_seqdev_info(dev_t i_dev, int *unit)
{
int u;
if (MIDIDEV(i_dev) != SND_DEV_SEQ && MIDIDEV(i_dev) != SND_DEV_SEQ2)
return NULL;
u = MIDIUNIT(i_dev);
if (unit)
*unit = u ;
return get_seqdev_info_unit(u);
}
/*
* a small utility function which, given a unit number, returns
* a pointer to the associated mididev_info struct.
*/
seqdev_info *
get_seqdev_info_unit(int unit)
{
seqdev_info *sd;
mtx_lock(&seqinfo_mtx);
TAILQ_FOREACH(sd, &seq_info, sd_link) {
if (sd->unit == unit)
break;
}
mtx_unlock(&seqinfo_mtx);
return sd;
}
/* Create a new sequencer device info structure. */
seqdev_info *
create_seqdev_info_unit(int unit, seqdev_info *seq)
{
seqdev_info *sd, *sdnew;
/* As malloc(9) might block, allocate seqdev_info now. */
sdnew = malloc(sizeof(seqdev_info), M_DEVBUF, M_WAITOK | M_ZERO);
if (sdnew == NULL)
return NULL;
bcopy(seq, sdnew, sizeof(seqdev_info));
sdnew->unit = unit;
midibuf_init(&sdnew->midi_dbuf_in);
midibuf_init(&sdnew->midi_dbuf_out);
mtx_init(&sdnew->flagqueue_mtx, "seqflq", MTX_DEF);
cv_init(&sdnew->insync_cv, "seqins");
mtx_lock(&seqinfo_mtx);
TAILQ_FOREACH(sd, &seq_info, sd_link) {
if (sd->unit == unit) {
mtx_unlock(&seqinfo_mtx);
midibuf_destroy(&sdnew->midi_dbuf_in);
midibuf_destroy(&sdnew->midi_dbuf_out);
mtx_destroy(&sdnew->flagqueue_mtx);
cv_destroy(&sdnew->insync_cv);
free(sdnew, M_DEVBUF);
return sd;
}
}
mtx_lock(&sdnew->flagqueue_mtx);
TAILQ_INSERT_TAIL(&seq_info, sdnew, sd_link);
nseq++;
mtx_unlock(&seqinfo_mtx);
return sdnew;
}
/*
* Look up a midi device by its unit number opened by this sequencer.
* If the device is not opened and mode is LOOKUP_OPEN, open the device.
*/
static int
lookup_mididev(sc_p scp, int unit, int mode, mididev_info **mdp)
{
int ret;
mididev_info *md;
if (mdp == NULL)
mdp = &md;
*mdp = NULL;
mtx_assert(&scp->devinfo->flagqueue_mtx, MA_OWNED);
TAILQ_FOREACH(md, &scp->midi_open, md_linkseq) {
if (md->unit == unit) {
*mdp = md;
if (mode == LOOKUP_CLOSE)
return seq_closemidi(scp, md, scp->fflags, MIDIDEV_MODE, curthread);
return (md != NULL && MIDICONFED(md)) ? 0 : ENXIO;
}
}
if (mode == LOOKUP_OPEN) {
md = get_mididev_info_unit(unit);
if (md != NULL) {
*mdp = md;
ret = seq_openmidi(scp, md, scp->fflags, MIDIDEV_MODE, curthread);
return ret;
}
}
return ENXIO;
}
/* XXX These functions are actually redundant. */
static int
seqopen(dev_t i_dev, int flags, int mode, struct thread *td)
{
switch (MIDIDEV(i_dev)) {
case MIDI_DEV_SEQ:
return seq_open(i_dev, flags, mode, td);
}
return (ENXIO);
}
static int
seqclose(dev_t i_dev, int flags, int mode, struct thread *td)
{
switch (MIDIDEV(i_dev)) {
case MIDI_DEV_SEQ:
return seq_close(i_dev, flags, mode, td);
}
return (ENXIO);
}
static int
seqread(dev_t i_dev, struct uio * buf, int flag)
{
switch (MIDIDEV(i_dev)) {
case MIDI_DEV_SEQ:
return seq_read(i_dev, buf, flag);
}
return (ENXIO);
}
static int
seqwrite(dev_t i_dev, struct uio * buf, int flag)
{
switch (MIDIDEV(i_dev)) {
case MIDI_DEV_SEQ:
return seq_write(i_dev, buf, flag);
}
return (ENXIO);
}
static int
seqioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
{
switch (MIDIDEV(i_dev)) {
case MIDI_DEV_SEQ:
return seq_ioctl(i_dev, cmd, arg, mode, td);
}
return (ENXIO);
}
static int
seqpoll(dev_t i_dev, int events, struct thread *td)
{
switch (MIDIDEV(i_dev)) {
case MIDI_DEV_SEQ:
return seq_poll(i_dev, events, td);
}
return (ENXIO);
}
static int
seq_modevent(module_t mod, int type, void *data)
{
int retval;
retval = 0;
switch (type) {
case MOD_LOAD:
seq_init();
break;
case MOD_UNLOAD:
printf("sequencer: unload not supported yet.\n");
retval = EOPNOTSUPP;
break;
default:
break;
}
return retval;
}
DEV_MODULE(seq, seq_modevent, NULL);
static void
seq_clone(arg, name, namelen, dev)
void *arg;
char *name;
int namelen;
dev_t *dev;
{
int u;
if (*dev != NODEV)
return;
if (bcmp(name, "sequencer", 9) != 0)
return;
if (name[10] != '\0' && name[11] != '\0')
return;
u = name[9] - '0';
if (name[10] != '\0') {
u *= 10;
u += name[10] - '0';
}
seq_initunit(u);
*dev = MIDIMKDEV(SEQ_CDEV_MAJOR, u, MIDI_DEV_SEQ);
return;
}
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