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freebsd-dev/sys/i386/isa/sound/sequencer.c
Jordan K. Hubbard ae28ee13b4 Update the sound driver to VOXWARE 3.05 with one GUS patch from 
Amancio.  There is some SoundSource support here that is primitive and
probably doesn't work, but I'll let the two submitters let me know
how my integration of that was since I don't have this card to test.
I've only tested this on my GUS MAX since it's all I have.

This all probably needs to be re-done anyway since we're widely variant
from the original VOXWARE source in the current layout.
Submitted by:	Amancio Hasty and Jim Lowe
Obtained from:  Hannu Savolainen
1995-07-28 21:40:49 +00:00

1987 lines
39 KiB
C
Raw Blame History

/*
* sound/sequencer.c
*
* 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.
*
*/
#define SEQUENCER_C
#include "sound_config.h"
#include "midi_ctrl.h"
#ifdef CONFIGURE_SOUNDCARD
#ifndef EXCLUDE_SEQUENCER
static int sequencer_ok = 0;
static struct sound_timer_operations *tmr;
static int tmr_no = -1; /* Currently selected timer */
static int pending_timer = -1; /* For timer change operation */
/*
* Local counts for number of synth and MIDI devices. These are initialized
* by the sequencer_open.
*/
static int max_mididev = 0;
static int max_synthdev = 0;
/*
* The seq_mode gives the operating mode of the sequencer:
* 1 = level1 (the default)
* 2 = level2 (extended capabilites)
*/
#define SEQ_1 1
#define SEQ_2 2
static int seq_mode = SEQ_1;
DEFINE_WAIT_QUEUE (seq_sleeper, seq_sleep_flag);
DEFINE_WAIT_QUEUE (midi_sleeper, midi_sleep_flag);
static int midi_opened[MAX_MIDI_DEV] =
{0};
static int midi_written[MAX_MIDI_DEV] =
{0};
unsigned long prev_input_time = 0;
int prev_event_time;
unsigned long seq_time = 0;
#include "tuning.h"
#define EV_SZ 8
#define IEV_SZ 8
static unsigned char *queue = NULL;
static unsigned char *iqueue = NULL;
static volatile int qhead = 0, qtail = 0, qlen = 0;
static volatile int iqhead = 0, iqtail = 0, iqlen = 0;
static volatile int seq_playing = 0;
static int sequencer_busy = 0;
static int output_treshold;
static int pre_event_timeout;
static unsigned synth_open_mask;
static int seq_queue (unsigned char *note, char nonblock);
static void seq_startplay (void);
static int seq_sync (void);
static void seq_reset (void);
static int pmgr_present[MAX_SYNTH_DEV] =
{0};
#if MAX_SYNTH_DEV > 15
#error Too many synthesizer devices enabled.
#endif
int
sequencer_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
int c = count, p = 0;
int ev_len;
unsigned long flags;
dev = dev >> 4;
ev_len = seq_mode == SEQ_1 ? 4 : 8;
if (dev) /*
* Patch manager device
*/
return pmgr_read (dev - 1, file, buf, count);
DISABLE_INTR (flags);
if (!iqlen)
{
if (ISSET_FILE_FLAG (file, O_NONBLOCK))
{
RESTORE_INTR (flags);
return RET_ERROR (EAGAIN);
}
DO_SLEEP (midi_sleeper, midi_sleep_flag, pre_event_timeout);
if (!iqlen)
{
RESTORE_INTR (flags);
return 0;
}
}
while (iqlen && c >= ev_len)
{
COPY_TO_USER (buf, p, &iqueue[iqhead * IEV_SZ], ev_len);
p += ev_len;
c -= ev_len;
iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
iqlen--;
}
RESTORE_INTR (flags);
return count - c;
}
static void
sequencer_midi_output (int dev)
{
/*
* Currently NOP
*/
}
void
seq_copy_to_input (unsigned char *event, int len)
{
unsigned long flags;
/*
* Verify that the len is valid for the current mode.
*/
if (len != 4 && len != 8)
return;
if ((seq_mode == SEQ_1) != (len == 4))
return;
if (iqlen >= (SEQ_MAX_QUEUE - 1))
return; /* Overflow */
DISABLE_INTR (flags);
memcpy (&iqueue[iqtail * IEV_SZ], event, len);
iqlen++;
iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
if (SOMEONE_WAITING (midi_sleeper, midi_sleep_flag))
{
WAKE_UP (midi_sleeper, midi_sleep_flag);
}
RESTORE_INTR (flags);
#if defined(__FreeBSD__)
if (selinfo[0].si_pid)
selwakeup(&selinfo[0]);
#endif
}
static void
sequencer_midi_input (int dev, unsigned char data)
{
unsigned int tstamp;
unsigned char event[4];
if (data == 0xfe) /* Ignore active sensing */
return;
tstamp = GET_TIME () - seq_time;
if (tstamp != prev_input_time)
{
tstamp = (tstamp << 8) | SEQ_WAIT;
seq_copy_to_input ((unsigned char *) &tstamp, 4);
prev_input_time = tstamp;
}
event[0] = SEQ_MIDIPUTC;
event[1] = data;
event[2] = dev;
event[3] = 0;
seq_copy_to_input (event, 4);
}
void
seq_input_event (unsigned char *event, int len)
{
unsigned long this_time;
if (seq_mode == SEQ_2)
this_time = tmr->get_time (tmr_no);
else
this_time = GET_TIME () - seq_time;
if (this_time != prev_input_time)
{
unsigned char tmp_event[8];
tmp_event[0] = EV_TIMING;
tmp_event[1] = TMR_WAIT_ABS;
tmp_event[2] = 0;
tmp_event[3] = 0;
*(unsigned long *) &tmp_event[4] = this_time;
seq_copy_to_input (tmp_event, 8);
prev_input_time = this_time;
}
seq_copy_to_input (event, len);
}
int
sequencer_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
unsigned char event[EV_SZ], ev_code;
int p = 0, c, ev_size;
int err;
int mode = file->mode & O_ACCMODE;
dev = dev >> 4;
DEB (printk ("sequencer_write(dev=%d, count=%d)\n", dev, count));
if (mode == OPEN_READ)
return RET_ERROR (EIO);
if (dev) /*
* Patch manager device
*/
return pmgr_write (dev - 1, file, buf, count);
c = count;
while (c >= 4)
{
COPY_FROM_USER (event, buf, p, 4);
ev_code = event[0];
if (ev_code == SEQ_FULLSIZE)
{
int err;
dev = *(unsigned short *) &event[2];
if (dev < 0 || dev >= max_synthdev)
return RET_ERROR (ENXIO);
if (!(synth_open_mask & (1 << dev)))
return RET_ERROR (ENXIO);
err = synth_devs[dev]->load_patch (dev, *(short *) &event[0], buf, p + 4, c, 0);
if (err < 0)
return err;
return err;
}
if (ev_code >= 128)
{
if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
{
printk ("Sequencer: Invalid level 2 event %x\n", ev_code);
return RET_ERROR (EINVAL);
}
ev_size = 8;
if (c < ev_size)
{
if (!seq_playing)
seq_startplay ();
return count - c;
}
COPY_FROM_USER (&event[4], buf, p + 4, 4);
}
else
{
if (seq_mode == SEQ_2)
{
printk ("Sequencer: 4 byte event in level 2 mode\n");
return RET_ERROR (EINVAL);
}
ev_size = 4;
}
if (event[0] == SEQ_MIDIPUTC)
{
if (!midi_opened[event[2]])
{
int mode;
int dev = event[2];
if (dev >= max_mididev)
{
printk ("Sequencer Error: Nonexistent MIDI device %d\n", dev);
return RET_ERROR (ENXIO);
}
mode = file->mode & O_ACCMODE;
if ((err = midi_devs[dev]->open (dev, mode,
sequencer_midi_input, sequencer_midi_output)) < 0)
{
seq_reset ();
printk ("Sequencer Error: Unable to open Midi #%d\n", dev);
return err;
}
midi_opened[dev] = 1;
}
}
if (!seq_queue (event, ISSET_FILE_FLAG (file, O_NONBLOCK)))
{
int processed = count - c;
if (!seq_playing)
seq_startplay ();
if (!processed && ISSET_FILE_FLAG (file, O_NONBLOCK))
return RET_ERROR (EAGAIN);
else
return processed;
}
p += ev_size;
c -= ev_size;
}
if (!seq_playing)
seq_startplay ();
return count; /* This will "eat" chunks shorter than 4 bytes (if written
* alone) Should we really do that ?
*/
}
static int
seq_queue (unsigned char *note, char nonblock)
{
/*
* Test if there is space in the queue
*/
if (qlen >= SEQ_MAX_QUEUE)
if (!seq_playing)
seq_startplay (); /*
* Give chance to drain the queue
*/
if (!nonblock && qlen >= SEQ_MAX_QUEUE && !SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
{
/*
* Sleep until there is enough space on the queue
*/
DO_SLEEP (seq_sleeper, seq_sleep_flag, 0);
}
if (qlen >= SEQ_MAX_QUEUE)
{
return 0; /*
* To be sure
*/
}
memcpy (&queue[qtail * EV_SZ], note, EV_SZ);
qtail = (qtail + 1) % SEQ_MAX_QUEUE;
qlen++;
return 1;
}
static int
extended_event (unsigned char *q)
{
int dev = q[2];
if (dev < 0 || dev >= max_synthdev)
return RET_ERROR (ENXIO);
if (!(synth_open_mask & (1 << dev)))
return RET_ERROR (ENXIO);
switch (q[1])
{
case SEQ_NOTEOFF:
synth_devs[dev]->kill_note (dev, q[3], q[4], q[5]);
break;
case SEQ_NOTEON:
if (q[4] > 127 && q[4] != 255)
return 0;
synth_devs[dev]->start_note (dev, q[3], q[4], q[5]);
break;
case SEQ_PGMCHANGE:
synth_devs[dev]->set_instr (dev, q[3], q[4]);
break;
case SEQ_AFTERTOUCH:
synth_devs[dev]->aftertouch (dev, q[3], q[4]);
break;
case SEQ_BALANCE:
synth_devs[dev]->panning (dev, q[3], (char) q[4]);
break;
case SEQ_CONTROLLER:
synth_devs[dev]->controller (dev, q[3], q[4], *(short *) &q[5]);
break;
case SEQ_VOLMODE:
if (synth_devs[dev]->volume_method != NULL)
synth_devs[dev]->volume_method (dev, q[3]);
break;
default:
return RET_ERROR (EINVAL);
}
return 0;
}
static int
find_voice (int dev, int chn, int note)
{
unsigned short key;
int i;
key = (chn << 8) | (note + 1);
for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
if (synth_devs[dev]->alloc.map[i] == key)
return i;
return -1;
}
static int
alloc_voice (int dev, int chn, int note)
{
unsigned short key;
int voice;
key = (chn << 8) | (note + 1);
voice = synth_devs[dev]->alloc_voice (dev, chn, note,
&synth_devs[dev]->alloc);
synth_devs[dev]->alloc.map[voice] = key;
synth_devs[dev]->alloc.alloc_times[voice] =
synth_devs[dev]->alloc.timestamp++;
return voice;
}
static void
seq_chn_voice_event (unsigned char *event)
{
unsigned char dev = event[1];
unsigned char cmd = event[2];
unsigned char chn = event[3];
unsigned char note = event[4];
unsigned char parm = event[5];
int voice = -1;
if ((int) dev > max_synthdev)
return;
if (!(synth_open_mask & (1 << dev)))
return;
if (!synth_devs[dev])
return;
if (seq_mode == SEQ_2)
{
if (synth_devs[dev]->alloc_voice)
voice = find_voice (dev, chn, note);
if (cmd == MIDI_NOTEON && parm == 0)
{
cmd = MIDI_NOTEOFF;
parm = 64;
}
}
switch (cmd)
{
case MIDI_NOTEON:
if (note > 127 && note != 255) /* Not a seq2 feature */
return;
if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
{ /* Internal synthesizer (FM, GUS, etc) */
voice = alloc_voice (dev, chn, note);
}
if (voice == -1)
voice = chn;
if (seq_mode == SEQ_2 && dev < num_synths)
{
/*
* The MIDI channel 10 is a percussive channel. Use the note
* number to select the proper patch (128 to 255) to play.
*/
if (chn == 9)
{
synth_devs[dev]->set_instr (dev, voice, 128 + note);
note = 60; /* Middle C */
}
}
if (seq_mode == SEQ_2)
{
synth_devs[dev]->setup_voice (dev, voice, chn);
}
synth_devs[dev]->start_note (dev, voice, note, parm);
break;
case MIDI_NOTEOFF:
if (voice == -1)
voice = chn;
synth_devs[dev]->kill_note (dev, voice, note, parm);
break;
case MIDI_KEY_PRESSURE:
if (voice == -1)
voice = chn;
synth_devs[dev]->aftertouch (dev, voice, parm);
break;
default:;
}
}
static void
seq_chn_common_event (unsigned char *event)
{
unsigned char dev = event[1];
unsigned char cmd = event[2];
unsigned char chn = event[3];
unsigned char p1 = event[4];
/* unsigned char p2 = event[5]; */
unsigned short w14 = *(short *) &event[6];
if ((int) dev > max_synthdev)
return;
if (!(synth_open_mask & (1 << dev)))
return;
if (!synth_devs[dev])
return;
switch (cmd)
{
case MIDI_PGM_CHANGE:
if (seq_mode == SEQ_2)
{
synth_devs[dev]->chn_info[chn].pgm_num = p1;
if (dev >= num_synths)
synth_devs[dev]->set_instr (dev, chn, p1);
}
else
synth_devs[dev]->set_instr (dev, chn, p1);
break;
case MIDI_CTL_CHANGE:
if (seq_mode == SEQ_2)
{
if (chn > 15 || p1 > 127)
break;
synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0x7f;
if (dev < num_synths)
{
int val = w14 & 0x7f;
int i, key;
if (p1 < 64) /* Combine MSB and LSB */
{
val = ((synth_devs[dev]->
chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
| (synth_devs[dev]->
chn_info[chn].controllers[p1 | 32] & 0x7f);
p1 &= ~32;
}
/* Handle all playing notes on this channel */
key = (chn << 8);
for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
synth_devs[dev]->controller (dev, i, p1, val);
}
else
synth_devs[dev]->controller (dev, chn, p1, w14);
}
else /* Mode 1 */
synth_devs[dev]->controller (dev, chn, p1, w14);
break;
case MIDI_PITCH_BEND:
if (seq_mode == SEQ_2)
{
synth_devs[dev]->chn_info[chn].bender_value = w14;
if (dev < num_synths)
{ /* Handle all playing notes on this channel */
int i, key;
key = (chn << 8);
for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
synth_devs[dev]->bender (dev, i, w14);
}
else
synth_devs[dev]->bender (dev, chn, w14);
}
else /* MODE 1 */
synth_devs[dev]->bender (dev, chn, w14);
break;
default:;
}
}
static int
seq_timing_event (unsigned char *event)
{
unsigned char cmd = event[1];
unsigned int parm = *(int *) &event[4];
if (seq_mode == SEQ_2)
{
int ret;
if ((ret = tmr->event (tmr_no, event)) == TIMER_ARMED)
{
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
{
unsigned long flags;
DISABLE_INTR (flags);
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
{
WAKE_UP (seq_sleeper, seq_sleep_flag);
}
RESTORE_INTR (flags);
#if defined(__FreeBSD__)
/* must issue a wakeup for anyone waiting (select) XXX */
#endif
}
}
return ret;
}
switch (cmd)
{
case TMR_WAIT_REL:
parm += prev_event_time;
/*
* NOTE! No break here. Execution of TMR_WAIT_REL continues in the
* next case (TMR_WAIT_ABS)
*/
case TMR_WAIT_ABS:
if (parm > 0)
{
long time;
seq_playing = 1;
time = parm;
prev_event_time = time;
request_sound_timer (time);
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
{
unsigned long flags;
DISABLE_INTR (flags);
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
{
WAKE_UP (seq_sleeper, seq_sleep_flag);
}
RESTORE_INTR (flags);
#if defined(__FreeBSD__)
/* must issue a wakeup for select XXX */
#endif
}
return TIMER_ARMED;
}
break;
case TMR_START:
seq_time = GET_TIME ();
prev_input_time = 0;
prev_event_time = 0;
break;
case TMR_STOP:
break;
case TMR_CONTINUE:
break;
case TMR_TEMPO:
break;
case TMR_ECHO:
if (seq_mode == SEQ_2)
seq_copy_to_input (event, 8);
else
{
parm = (parm << 8 | SEQ_ECHO);
seq_copy_to_input ((unsigned char *) &parm, 4);
}
break;
default:;
}
return TIMER_NOT_ARMED;
}
static void
seq_local_event (unsigned char *event)
{
/* unsigned char cmd = event[1]; */
printk ("seq_local_event() called. WHY????????\n");
}
static int
play_event (unsigned char *q)
{
/*
* NOTE! This routine returns
* 0 = normal event played.
* 1 = Timer armed. Suspend playback until timer callback.
* 2 = MIDI output buffer full. Restore queue and suspend until timer
*/
unsigned long *delay;
switch (q[0])
{
case SEQ_NOTEOFF:
if (synth_open_mask & (1 << 0))
if (synth_devs[0])
synth_devs[0]->kill_note (0, q[1], 255, q[3]);
break;
case SEQ_NOTEON:
if (q[4] < 128 || q[4] == 255)
if (synth_open_mask & (1 << 0))
if (synth_devs[0])
synth_devs[0]->start_note (0, q[1], q[2], q[3]);
break;
case SEQ_WAIT:
delay = (unsigned long *) q; /*
* Bytes 1 to 3 are containing the *
* delay in GET_TIME()
*/
*delay = (*delay >> 8) & 0xffffff;
if (*delay > 0)
{
long time;
seq_playing = 1;
time = *delay;
prev_event_time = time;
request_sound_timer (time);
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
{
unsigned long flags;
DISABLE_INTR (flags);
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
{
WAKE_UP (seq_sleeper, seq_sleep_flag);
}
RESTORE_INTR (flags);
#if defined(__FreeBSD__)
/* must issue a wakeup for selects XXX */
#endif
}
/*
* The timer is now active and will reinvoke this function
* after the timer expires. Return to the caller now.
*/
return 1;
}
break;
case SEQ_PGMCHANGE:
if (synth_open_mask & (1 << 0))
if (synth_devs[0])
synth_devs[0]->set_instr (0, q[1], q[2]);
break;
case SEQ_SYNCTIMER: /*
* Reset timer
*/
seq_time = GET_TIME ();
prev_input_time = 0;
prev_event_time = 0;
break;
case SEQ_MIDIPUTC: /*
* Put a midi character
*/
if (midi_opened[q[2]])
{
int dev;
dev = q[2];
if (!midi_devs[dev]->putc (dev, q[1]))
{
/*
* Output FIFO is full. Wait one timer cycle and try again.
*/
seq_playing = 1;
request_sound_timer (-1);
return 2;
}
else
midi_written[dev] = 1;
}
break;
case SEQ_ECHO:
seq_copy_to_input (q, 4); /*
* Echo back to the process
*/
break;
case SEQ_PRIVATE:
if ((int) q[1] < max_synthdev)
synth_devs[q[1]]->hw_control (q[1], q);
break;
case SEQ_EXTENDED:
extended_event (q);
break;
case EV_CHN_VOICE:
seq_chn_voice_event (q);
break;
case EV_CHN_COMMON:
seq_chn_common_event (q);
break;
case EV_TIMING:
if (seq_timing_event (q) == TIMER_ARMED)
{
return 1;
}
break;
case EV_SEQ_LOCAL:
seq_local_event (q);
break;
default:;
}
return 0;
}
static void
seq_startplay (void)
{
unsigned long flags;
int this_one, action;
while (qlen > 0)
{
DISABLE_INTR (flags);
qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
qlen--;
RESTORE_INTR (flags);
seq_playing = 1;
if ((action = play_event (&queue[this_one * EV_SZ])))
{ /* Suspend playback. Next timer routine invokes this routine again */
if (action == 2)
{
qlen++;
qhead = this_one;
}
return;
}
}
seq_playing = 0;
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
{
unsigned long flags;
DISABLE_INTR (flags);
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
{
WAKE_UP (seq_sleeper, seq_sleep_flag);
}
RESTORE_INTR (flags);
#if defined(__FreeBSD__)
/* must issue a wakeup for selects XXX */
#endif
}
}
static void
reset_controllers (int dev, unsigned char *controller, int update_dev)
{
int i;
for (i = 0; i < 128; i++)
controller[i] = ctrl_def_values[i];
}
static void
setup_mode2 (void)
{
int dev;
max_synthdev = num_synths;
for (dev = 0; dev < num_midis; dev++)
if (midi_devs[dev]->converter != NULL)
{
synth_devs[max_synthdev++] =
midi_devs[dev]->converter;
}
for (dev = 0; dev < max_synthdev; dev++)
{
int chn;
for (chn = 0; chn < 16; chn++)
{
synth_devs[dev]->chn_info[chn].pgm_num = 0;
reset_controllers (dev,
synth_devs[dev]->chn_info[chn].controllers,
0);
synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
}
}
max_mididev = 0;
seq_mode = SEQ_2;
}
int
sequencer_open (int dev, struct fileinfo *file)
{
int retval, mode, i;
int level, tmp;
level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
dev = dev >> 4;
mode = file->mode & O_ACCMODE;
DEB (printk ("sequencer_open(dev=%d)\n", dev));
if (!sequencer_ok)
{
printk ("Soundcard: Sequencer not initialized\n");
return RET_ERROR (ENXIO);
}
if (dev) /*
* Patch manager device
*/
{
int err;
dev--;
if (dev >= MAX_SYNTH_DEV)
return RET_ERROR (ENXIO);
if (pmgr_present[dev])
return RET_ERROR (EBUSY);
if ((err = pmgr_open (dev)) < 0)
return err; /*
* Failed
*/
pmgr_present[dev] = 1;
return err;
}
if (sequencer_busy)
{
printk ("Sequencer busy\n");
return RET_ERROR (EBUSY);
}
max_mididev = num_midis;
max_synthdev = num_synths;
pre_event_timeout = 0;
seq_mode = SEQ_1;
if (pending_timer != -1)
{
tmr_no = pending_timer;
pending_timer = -1;
}
if (tmr_no == -1) /* Not selected yet */
{
int i, best;
best = -1;
for (i = 0; i < num_sound_timers; i++)
if (sound_timer_devs[i]->priority > best)
{
tmr_no = i;
best = sound_timer_devs[i]->priority;
}
if (tmr_no == -1) /* Should not be */
tmr_no = 0;
}
tmr = sound_timer_devs[tmr_no];
if (level == 2)
{
if (tmr == NULL)
{
printk ("sequencer: No timer for level 2\n");
return RET_ERROR (ENXIO);
}
setup_mode2 ();
}
if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
if (!max_mididev)
{
printk ("Sequencer: No Midi devices. Input not possible\n");
return RET_ERROR (ENXIO);
}
if (!max_synthdev && !max_mididev)
return RET_ERROR (ENXIO);
synth_open_mask = 0;
for (i = 0; i < max_mididev; i++)
{
midi_opened[i] = 0;
midi_written[i] = 0;
}
/*
* if (mode == OPEN_WRITE || mode == OPEN_READWRITE)
*/
for (i = 0; i < max_synthdev; i++) /*
* Open synth devices
*/
if ((tmp = synth_devs[i]->open (i, mode)) < 0)
{
printk ("Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
if (synth_devs[i]->midi_dev)
printk ("(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
}
else
{
synth_open_mask |= (1 << i);
if (synth_devs[i]->midi_dev) /*
* Is a midi interface
*/
midi_opened[synth_devs[i]->midi_dev] = 1;
}
seq_time = GET_TIME ();
prev_input_time = 0;
prev_event_time = 0;
if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
{ /*
* Initialize midi input devices
*/
for (i = 0; i < max_mididev; i++)
if (!midi_opened[i])
{
if ((retval = midi_devs[i]->open (i, mode,
sequencer_midi_input, sequencer_midi_output)) >= 0)
midi_opened[i] = 1;
}
}
if (seq_mode == SEQ_2)
{
tmr->open (tmr_no, seq_mode);
}
sequencer_busy = 1;
RESET_WAIT_QUEUE (seq_sleeper, seq_sleep_flag);
RESET_WAIT_QUEUE (midi_sleeper, midi_sleep_flag);
output_treshold = SEQ_MAX_QUEUE / 2;
for (i = 0; i < num_synths; i++)
if (pmgr_present[i])
pmgr_inform (i, PM_E_OPENED, 0, 0, 0, 0);
return 0;
}
void
seq_drain_midi_queues (void)
{
int i, n;
/*
* Give the Midi drivers time to drain their output queues
*/
n = 1;
while (!PROCESS_ABORTING (seq_sleeper, seq_sleep_flag) && n)
{
n = 0;
for (i = 0; i < max_mididev; i++)
if (midi_opened[i] && midi_written[i])
if (midi_devs[i]->buffer_status != NULL)
if (midi_devs[i]->buffer_status (i))
n++;
/*
* Let's have a delay
*/
if (n)
{
DO_SLEEP (seq_sleeper, seq_sleep_flag, HZ / 10);
}
}
}
void
sequencer_release (int dev, struct fileinfo *file)
{
int i;
int mode = file->mode & O_ACCMODE;
dev = dev >> 4;
DEB (printk ("sequencer_release(dev=%d)\n", dev));
if (dev) /*
* Patch manager device
*/
{
dev--;
pmgr_release (dev);
pmgr_present[dev] = 0;
return;
}
/*
* * Wait until the queue is empty (if we don't have nonblock)
*/
if (mode != OPEN_READ && !ISSET_FILE_FLAG (file, O_NONBLOCK))
while (!PROCESS_ABORTING (seq_sleeper, seq_sleep_flag) && qlen)
{
seq_sync ();
}
if (mode != OPEN_READ)
seq_drain_midi_queues (); /*
* Ensure the output queues are empty
*/
seq_reset ();
if (mode != OPEN_READ)
seq_drain_midi_queues (); /*
* Flush the all notes off messages
*/
for (i = 0; i < max_synthdev; i++)
if (synth_open_mask & (1 << i)) /*
* Actually opened
*/
if (synth_devs[i])
{
synth_devs[i]->close (i);
if (synth_devs[i]->midi_dev)
midi_opened[synth_devs[i]->midi_dev] = 0;
}
for (i = 0; i < num_synths; i++)
if (pmgr_present[i])
pmgr_inform (i, PM_E_CLOSED, 0, 0, 0, 0);
for (i = 0; i < max_mididev; i++)
if (midi_opened[i])
midi_devs[i]->close (i);
if (seq_mode == SEQ_2)
tmr->close (tmr_no);
sequencer_busy = 0;
}
static int
seq_sync (void)
{
unsigned long flags;
if (qlen && !seq_playing && !PROCESS_ABORTING (seq_sleeper, seq_sleep_flag))
seq_startplay ();
DISABLE_INTR (flags);
if (qlen && !SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
{
DO_SLEEP (seq_sleeper, seq_sleep_flag, 0);
}
RESTORE_INTR (flags);
return qlen;
}
static void
midi_outc (int dev, unsigned char data)
{
/*
* NOTE! Calls sleep(). Don't call this from interrupt.
*/
int n;
unsigned long flags;
/*
* This routine sends one byte to the Midi channel.
* If the output Fifo is full, it waits until there
* is space in the queue
*/
n = 3 * HZ; /* Timeout */
DISABLE_INTR (flags);
while (n && !midi_devs[dev]->putc (dev, data))
{
DO_SLEEP (seq_sleeper, seq_sleep_flag, 4);
n--;
}
RESTORE_INTR (flags);
}
static void
seq_reset (void)
{
/*
* NOTE! Calls sleep(). Don't call this from interrupt.
*/
int i;
int chn;
unsigned long flags;
sound_stop_timer ();
seq_time = GET_TIME ();
prev_input_time = 0;
prev_event_time = 0;
qlen = qhead = qtail = 0;
iqlen = iqhead = iqtail = 0;
for (i = 0; i < max_synthdev; i++)
if (synth_open_mask & (1 << i))
if (synth_devs[i])
synth_devs[i]->reset (i);
if (seq_mode == SEQ_2)
{
for (chn = 0; chn < 16; chn++)
for (i = 0; i < max_synthdev; i++)
if (synth_open_mask & (1 << i))
if (synth_devs[i])
{
synth_devs[i]->controller (i, chn, 123, 0); /* All notes off */
synth_devs[i]->controller (i, chn, 121, 0); /* Reset all ctl */
synth_devs[i]->bender (i, chn, 1 << 13); /* Bender off */
}
}
else
/* seq_mode == SEQ_1 */
{
for (i = 0; i < max_mididev; i++)
if (midi_written[i]) /*
* Midi used. Some notes may still be playing
*/
{
/*
* Sending just a ACTIVE SENSING message should be enough to stop all
* playing notes. Since there are devices not recognizing the
* active sensing, we have to send some all notes off messages also.
*/
midi_outc (i, 0xfe);
for (chn = 0; chn < 16; chn++)
{
midi_outc (i,
(unsigned char) (0xb0 + (chn & 0x0f))); /* control change */
midi_outc (i, 0x7b); /* All notes off */
midi_outc (i, 0); /* Dummy parameter */
}
midi_devs[i]->close (i);
midi_written[i] = 0;
midi_opened[i] = 0;
}
}
seq_playing = 0;
DISABLE_INTR (flags);
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
{
/* printk ("Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
WAKE_UP (seq_sleeper, seq_sleep_flag);
}
RESTORE_INTR (flags);
}
static void
seq_panic (void)
{
/*
* This routine is called by the application in case the user
* wants to reset the system to the default state.
*/
seq_reset ();
/*
* Since some of the devices don't recognize the active sensing and
* all notes off messages, we have to shut all notes manually.
*
* TO BE IMPLEMENTED LATER
*/
/*
* Also return the controllers to their default states
*/
}
int
sequencer_ioctl (int dev, struct fileinfo *file,
unsigned int cmd, unsigned int arg)
{
int midi_dev, orig_dev;
int mode = file->mode & O_ACCMODE;
orig_dev = dev = dev >> 4;
switch (cmd)
{
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 (dev) /* Patch manager */
return RET_ERROR (EIO);
if (seq_mode != SEQ_2)
return RET_ERROR (EINVAL);
return tmr->ioctl (tmr_no, cmd, arg);
break;
case SNDCTL_TMR_SELECT:
if (dev) /* Patch manager */
return RET_ERROR (EIO);
if (seq_mode != SEQ_2)
return RET_ERROR (EINVAL);
pending_timer = IOCTL_IN (arg);
if (pending_timer < 0 || pending_timer >= num_sound_timers)
{
pending_timer = -1;
return RET_ERROR (EINVAL);
}
return IOCTL_OUT (arg, pending_timer);
break;
case SNDCTL_SEQ_PANIC:
seq_panic ();
break;
case SNDCTL_SEQ_SYNC:
if (dev) /*
* Patch manager
*/
return RET_ERROR (EIO);
if (mode == OPEN_READ)
return 0;
while (qlen && !PROCESS_ABORTING (seq_sleeper, seq_sleep_flag))
seq_sync ();
if (qlen)
return RET_ERROR (EINTR);
else
return 0;
break;
case SNDCTL_SEQ_RESET:
if (dev) /*
* Patch manager
*/
return RET_ERROR (EIO);
seq_reset ();
return 0;
break;
case SNDCTL_SEQ_TESTMIDI:
if (dev) /*
* Patch manager
*/
return RET_ERROR (EIO);
midi_dev = IOCTL_IN (arg);
if (midi_dev >= max_mididev)
return RET_ERROR (ENXIO);
if (!midi_opened[midi_dev])
{
int err, mode;
mode = file->mode & O_ACCMODE;
if ((err = midi_devs[midi_dev]->open (midi_dev, mode,
sequencer_midi_input,
sequencer_midi_output)) < 0)
return err;
}
midi_opened[midi_dev] = 1;
return 0;
break;
case SNDCTL_SEQ_GETINCOUNT:
if (dev) /*
* Patch manager
*/
return RET_ERROR (EIO);
if (mode == OPEN_WRITE)
return 0;
return IOCTL_OUT (arg, iqlen);
break;
case SNDCTL_SEQ_GETOUTCOUNT:
if (mode == OPEN_READ)
return 0;
return IOCTL_OUT (arg, SEQ_MAX_QUEUE - qlen);
break;
case SNDCTL_SEQ_CTRLRATE:
if (dev) /* Patch manager */
return RET_ERROR (EIO);
/*
* If *arg == 0, just return the current rate
*/
if (seq_mode == SEQ_2)
return tmr->ioctl (tmr_no, cmd, arg);
if (IOCTL_IN (arg) != 0)
return RET_ERROR (EINVAL);
return IOCTL_OUT (arg, HZ);
break;
case SNDCTL_SEQ_RESETSAMPLES:
dev = IOCTL_IN (arg);
if (dev < 0 || dev >= num_synths)
return RET_ERROR (ENXIO);
if (!(synth_open_mask & (1 << dev)) && !orig_dev)
return RET_ERROR (EBUSY);
if (!orig_dev && pmgr_present[dev])
pmgr_inform (dev, PM_E_PATCH_RESET, 0, 0, 0, 0);
return synth_devs[dev]->ioctl (dev, cmd, arg);
break;
case SNDCTL_SEQ_NRSYNTHS:
return IOCTL_OUT (arg, max_synthdev);
break;
case SNDCTL_SEQ_NRMIDIS:
return IOCTL_OUT (arg, max_mididev);
break;
case SNDCTL_SYNTH_MEMAVL:
{
int dev = IOCTL_IN (arg);
if (dev < 0 || dev >= num_synths)
return RET_ERROR (ENXIO);
if (!(synth_open_mask & (1 << dev)) && !orig_dev)
return RET_ERROR (EBUSY);
return IOCTL_OUT (arg, synth_devs[dev]->ioctl (dev, cmd, arg));
}
break;
case SNDCTL_FM_4OP_ENABLE:
{
int dev = IOCTL_IN (arg);
if (dev < 0 || dev >= num_synths)
return RET_ERROR (ENXIO);
if (!(synth_open_mask & (1 << dev)))
return RET_ERROR (ENXIO);
synth_devs[dev]->ioctl (dev, cmd, arg);
return 0;
}
break;
case SNDCTL_SYNTH_INFO:
{
struct synth_info inf;
int dev;
IOCTL_FROM_USER ((char *) &inf, (char *) arg, 0, sizeof (inf));
dev = inf.device;
if (dev < 0 || dev >= max_synthdev)
return RET_ERROR (ENXIO);
if (!(synth_open_mask & (1 << dev)) && !orig_dev)
return RET_ERROR (EBUSY);
return synth_devs[dev]->ioctl (dev, cmd, arg);
}
break;
case SNDCTL_SEQ_OUTOFBAND:
{
struct seq_event_rec event;
unsigned long flags;
IOCTL_FROM_USER ((char *) &event, (char *) arg, 0, sizeof (event));
DISABLE_INTR (flags);
play_event (event.arr);
RESTORE_INTR (flags);
return 0;
}
break;
case SNDCTL_MIDI_INFO:
{
struct midi_info inf;
int dev;
IOCTL_FROM_USER ((char *) &inf, (char *) arg, 0, sizeof (inf));
dev = inf.device;
if (dev < 0 || dev >= max_mididev)
return RET_ERROR (ENXIO);
IOCTL_TO_USER ((char *) arg, 0, (char *) &(midi_devs[dev]->info), sizeof (inf));
return 0;
}
break;
case SNDCTL_PMGR_IFACE:
{
struct patmgr_info *inf;
int dev, err;
if ((inf = (struct patmgr_info *) KERNEL_MALLOC (sizeof (*inf))) == NULL)
{
printk ("patmgr: Can't allocate memory for a message\n");
return RET_ERROR (EIO);
}
IOCTL_FROM_USER ((char *) inf, (char *) arg, 0, sizeof (*inf));
dev = inf->device;
if (dev < 0 || dev >= num_synths)
{
KERNEL_FREE (inf);
return RET_ERROR (ENXIO);
}
if (!synth_devs[dev]->pmgr_interface)
{
KERNEL_FREE (inf);
return RET_ERROR (ENXIO);
}
if ((err = synth_devs[dev]->pmgr_interface (dev, inf)) == -1)
{
KERNEL_FREE (inf);
return err;
}
IOCTL_TO_USER ((char *) arg, 0, (char *) inf, sizeof (*inf));
KERNEL_FREE (inf);
return 0;
}
break;
case SNDCTL_PMGR_ACCESS:
{
struct patmgr_info *inf;
int dev, err;
if ((inf = (struct patmgr_info *) KERNEL_MALLOC (sizeof (*inf))) == NULL)
{
printk ("patmgr: Can't allocate memory for a message\n");
return RET_ERROR (EIO);
}
IOCTL_FROM_USER ((char *) inf, (char *) arg, 0, sizeof (*inf));
dev = inf->device;
if (dev < 0 || dev >= num_synths)
{
KERNEL_FREE (inf);
return RET_ERROR (ENXIO);
}
if (!pmgr_present[dev])
{
KERNEL_FREE (inf);
return RET_ERROR (ESRCH);
}
if ((err = pmgr_access (dev, inf)) < 0)
{
KERNEL_FREE (inf);
return err;
}
IOCTL_TO_USER ((char *) arg, 0, (char *) inf, sizeof (*inf));
KERNEL_FREE (inf);
return 0;
}
break;
case SNDCTL_SEQ_TRESHOLD:
{
int tmp = IOCTL_IN (arg);
if (dev) /*
* Patch manager
*/
return RET_ERROR (EIO);
if (tmp < 1)
tmp = 1;
if (tmp >= SEQ_MAX_QUEUE)
tmp = SEQ_MAX_QUEUE - 1;
output_treshold = tmp;
return 0;
}
break;
case SNDCTL_MIDI_PRETIME:
{
int val = IOCTL_IN (arg);
if (val < 0)
val = 0;
val = (HZ * val) / 10;
pre_event_timeout = val;
return IOCTL_OUT (arg, val);
}
break;
default:
if (dev) /*
* Patch manager
*/
return RET_ERROR (EIO);
if (mode == OPEN_READ)
return RET_ERROR (EIO);
if (!synth_devs[0])
return RET_ERROR (ENXIO);
if (!(synth_open_mask & (1 << 0)))
return RET_ERROR (ENXIO);
return synth_devs[0]->ioctl (0, cmd, arg);
break;
}
return RET_ERROR (EINVAL);
}
#ifdef ALLOW_SELECT
int
sequencer_select (int dev, struct fileinfo *file, int sel_type, select_table * wait)
{
unsigned long flags;
dev = dev >> 4;
switch (sel_type)
{
case SEL_IN:
DISABLE_INTR (flags);
if (!iqlen)
{
#if defined(__FreeBSD__)
selrecord(wait, &selinfo[dev]);
#else
midi_sleep_flag.mode = WK_SLEEP;
select_wait (&midi_sleeper, wait);
#endif
RESTORE_INTR (flags);
return 0;
}
midi_sleep_flag.mode &= ~WK_SLEEP;
RESTORE_INTR (flags);
return 1;
break;
case SEL_OUT:
DISABLE_INTR (flags);
if (qlen >= SEQ_MAX_QUEUE)
{
#if defined(__FreeBSD__)
selrecord(wait, &selinfo[dev]);
#else
seq_sleep_flag.mode = WK_SLEEP;
select_wait (&seq_sleeper, wait);
#endif
RESTORE_INTR (flags);
return 0;
}
seq_sleep_flag.mode &= ~WK_SLEEP;
RESTORE_INTR (flags);
return 1;
break;
case SEL_EX:
return 0;
}
return 0;
}
#endif
void
sequencer_timer (void)
{
seq_startplay ();
}
int
note_to_freq (int note_num)
{
/*
* This routine converts a midi note to a frequency (multiplied by 1000)
*/
int note, octave, note_freq;
int notes[] =
{
261632, 277189, 293671, 311132, 329632, 349232,
369998, 391998, 415306, 440000, 466162, 493880
};
#define BASE_OCTAVE 5
octave = note_num / 12;
note = note_num % 12;
note_freq = notes[note];
if (octave < BASE_OCTAVE)
note_freq >>= (BASE_OCTAVE - octave);
else if (octave > BASE_OCTAVE)
note_freq <<= (octave - BASE_OCTAVE);
/*
* note_freq >>= 1;
*/
return note_freq;
}
unsigned long
compute_finetune (unsigned long base_freq, int bend, int range)
{
unsigned long amount;
int negative, semitones, cents, multiplier = 1;
if (!bend)
return base_freq;
if (!range)
return base_freq;
if (!base_freq)
return base_freq;
if (range >= 8192)
range = 8191;
bend = bend * range / 8192;
if (!bend)
return base_freq;
negative = bend < 0 ? 1 : 0;
if (bend < 0)
bend *= -1;
if (bend > range)
bend = range;
/*
if (bend > 2399)
bend = 2399;
*/
while (bend > 2399)
{
multiplier *= 4;
bend -= 2400;
}
semitones = bend / 100;
cents = bend % 100;
amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents])
/ 10000;
if (negative)
return (base_freq * 10000) / amount; /*
* Bend down
*/
else
return (base_freq * amount) / 10000; /*
* Bend up
*/
}
long
sequencer_init (long mem_start)
{
sequencer_ok = 1;
PERMANENT_MALLOC (unsigned char *, queue, SEQ_MAX_QUEUE * EV_SZ, mem_start);
PERMANENT_MALLOC (unsigned char *, iqueue, SEQ_MAX_QUEUE * IEV_SZ, mem_start);
return mem_start;
}
#else
/*
* Stub version
*/
int
sequencer_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
return RET_ERROR (EIO);
}
int
sequencer_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
return RET_ERROR (EIO);
}
int
sequencer_open (int dev, struct fileinfo *file)
{
return RET_ERROR (ENXIO);
}
void
sequencer_release (int dev, struct fileinfo *file)
{
}
int
sequencer_ioctl (int dev, struct fileinfo *file,
unsigned int cmd, unsigned int arg)
{
return RET_ERROR (EIO);
}
int
sequencer_lseek (int dev, struct fileinfo *file, off_t offset, int orig)
{
return RET_ERROR (EIO);
}
long
sequencer_init (long mem_start)
{
return mem_start;
}
#ifdef ALLOW_SELECT
int
sequencer_select (int dev, struct fileinfo *file, int sel_type, select_table * wait)
{
return RET_ERROR (EIO);
}
#endif
#endif
#endif
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