2 * OSS compatible sequencer driver
4 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include "seq_oss_device.h"
22 #include "seq_oss_synth.h"
23 #include "seq_oss_midi.h"
24 #include "seq_oss_event.h"
25 #include "seq_oss_timer.h"
26 #include <sound/seq_oss_legacy.h>
27 #include "seq_oss_readq.h"
28 #include "seq_oss_writeq.h"
34 static int extended_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev);
35 static int chn_voice_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev);
36 static int chn_common_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev);
37 static int timing_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev);
38 static int local_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev);
39 static int old_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev);
40 static int note_on_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev);
41 static int note_off_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev);
42 static int set_note_event(struct seq_oss_devinfo *dp, int dev, int type, int ch, int note, int vel, struct snd_seq_event *ev);
43 static int set_control_event(struct seq_oss_devinfo *dp, int dev, int type, int ch, int param, int val, struct snd_seq_event *ev);
44 static int set_echo_event(struct seq_oss_devinfo *dp, union evrec *rec, struct snd_seq_event *ev);
48 * convert an OSS event to ALSA event
50 * non-zero : invalid - ignored
54 snd_seq_oss_process_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev)
58 return extended_event(dp, q, ev);
61 return chn_voice_event(dp, q, ev);
64 return chn_common_event(dp, q, ev);
67 return timing_event(dp, q, ev);
70 return local_event(dp, q, ev);
73 return snd_seq_oss_synth_sysex(dp, q->x.dev, q->x.buf, ev);
76 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
79 if (! is_write_mode(dp->file_mode))
81 if (snd_seq_oss_midi_open(dp, q->s.dev, SNDRV_SEQ_OSS_FILE_WRITE))
83 if (snd_seq_oss_midi_filemode(dp, q->s.dev) & SNDRV_SEQ_OSS_FILE_WRITE)
84 return snd_seq_oss_midi_putc(dp, q->s.dev, q->s.parm1, ev);
88 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
90 return set_echo_event(dp, q, ev);
93 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
95 return snd_seq_oss_synth_raw_event(dp, q->c[1], q->c, ev);
98 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
100 return old_event(dp, q, ev);
105 /* old type events: mode1 only */
107 old_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev)
111 return note_off_event(dp, 0, q->n.chn, q->n.note, q->n.vel, ev);
114 return note_on_event(dp, 0, q->n.chn, q->n.note, q->n.vel, ev);
121 return set_control_event(dp, 0, SNDRV_SEQ_EVENT_PGMCHANGE,
122 q->n.chn, 0, q->n.note, ev);
125 return snd_seq_oss_timer_reset(dp->timer);
131 /* 8bytes extended event: mode1 only */
133 extended_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev)
139 return note_off_event(dp, q->e.dev, q->e.chn, q->e.p1, q->e.p2, ev);
142 return note_on_event(dp, q->e.dev, q->e.chn, q->e.p1, q->e.p2, ev);
145 return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_PGMCHANGE,
146 q->e.chn, 0, q->e.p1, ev);
149 return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_CHANPRESS,
150 q->e.chn, 0, q->e.p1, ev);
153 /* convert -128:127 to 0:127 */
155 val = (val + 128) / 2;
156 return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_CONTROLLER,
157 q->e.chn, CTL_PAN, val, ev);
160 val = ((short)q->e.p3 << 8) | (short)q->e.p2;
162 case CTRL_PITCH_BENDER: /* SEQ1 V2 control */
164 return set_control_event(dp, q->e.dev,
165 SNDRV_SEQ_EVENT_PITCHBEND,
166 q->e.chn, 0, val, ev);
167 case CTRL_PITCH_BENDER_RANGE:
168 /* conversion: 100/semitone -> 128/semitone */
169 return set_control_event(dp, q->e.dev,
170 SNDRV_SEQ_EVENT_REGPARAM,
171 q->e.chn, 0, val*128/100, ev);
173 return set_control_event(dp, q->e.dev,
174 SNDRV_SEQ_EVENT_CONTROL14,
175 q->e.chn, q->e.p1, val, ev);
179 return snd_seq_oss_synth_raw_event(dp, q->e.dev, q->c, ev);
185 /* channel voice events: mode1 and 2 */
187 chn_voice_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev)
193 return note_on_event(dp, q->v.dev, q->v.chn, q->v.note, q->v.parm, ev);
196 return note_off_event(dp, q->v.dev, q->v.chn, q->v.note, q->v.parm, ev);
198 case MIDI_KEY_PRESSURE:
199 return set_note_event(dp, q->v.dev, SNDRV_SEQ_EVENT_KEYPRESS,
200 q->v.chn, q->v.note, q->v.parm, ev);
206 /* channel common events: mode1 and 2 */
208 chn_common_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev)
213 case MIDI_PGM_CHANGE:
214 return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_PGMCHANGE,
215 q->l.chn, 0, q->l.p1, ev);
217 case MIDI_CTL_CHANGE:
218 return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_CONTROLLER,
219 q->l.chn, q->l.p1, q->l.val, ev);
221 case MIDI_PITCH_BEND:
222 /* conversion: 0:0x3fff -> -0x2000:0x1fff */
223 return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_PITCHBEND,
224 q->l.chn, 0, q->l.val - 8192, ev);
226 case MIDI_CHN_PRESSURE:
227 return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_CHANPRESS,
228 q->l.chn, 0, q->l.val, ev);
233 /* timer events: mode1 and mode2 */
235 timing_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev)
239 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
240 return set_echo_event(dp, q, ev);
243 memset(&tmp, 0, sizeof(tmp));
244 /* XXX: only for little-endian! */
245 tmp.echo = (q->t.time << 8) | SEQ_ECHO;
246 return set_echo_event(dp, &tmp, ev);
251 return snd_seq_oss_timer_stop(dp->timer);
256 return snd_seq_oss_timer_continue(dp->timer);
261 return snd_seq_oss_timer_tempo(dp->timer, q->t.time);
268 /* local events: mode1 and 2 */
270 local_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev)
276 * process note-on event for OSS synth
277 * three different modes are available:
278 * - SNDRV_SEQ_OSS_PROCESS_EVENTS (for one-voice per channel mode)
279 * Accept note 255 as volume change.
280 * - SNDRV_SEQ_OSS_PASS_EVENTS
281 * Pass all events to lowlevel driver anyway
282 * - SNDRV_SEQ_OSS_PROCESS_KEYPRESS (mostly for Emu8000)
283 * Use key-pressure if note >= 128
286 note_on_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev)
288 struct seq_oss_synthinfo *info = &dp->synths[dev];
289 switch (info->arg.event_passing) {
290 case SNDRV_SEQ_OSS_PROCESS_EVENTS:
291 if (! info->ch || ch < 0 || ch >= info->nr_voices) {
293 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev);
296 if (note == 255 && info->ch[ch].note >= 0) {
300 /* set volume to zero -- note off */
301 // type = SNDRV_SEQ_EVENT_NOTEOFF;
303 if (info->ch[ch].vel)
304 /* sample already started -- volume change */
305 type = SNDRV_SEQ_EVENT_KEYPRESS;
307 /* sample not started -- start now */
308 type = SNDRV_SEQ_EVENT_NOTEON;
309 info->ch[ch].vel = vel;
310 return set_note_event(dp, dev, type, ch, info->ch[ch].note, vel, ev);
311 } else if (note >= 128)
312 return -EINVAL; /* invalid */
314 if (note != info->ch[ch].note && info->ch[ch].note >= 0)
315 /* note changed - note off at beginning */
316 set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, info->ch[ch].note, 0, ev);
317 /* set current status */
318 info->ch[ch].note = note;
319 info->ch[ch].vel = vel;
320 if (vel) /* non-zero velocity - start the note now */
321 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev);
324 case SNDRV_SEQ_OSS_PASS_EVENTS:
325 /* pass the event anyway */
326 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev);
328 case SNDRV_SEQ_OSS_PROCESS_KEYPRESS:
329 if (note >= 128) /* key pressure: shifted by 128 */
330 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_KEYPRESS, ch, note - 128, vel, ev);
331 else /* normal note-on event */
332 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev);
338 * process note-off event for OSS synth
341 note_off_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev)
343 struct seq_oss_synthinfo *info = &dp->synths[dev];
344 switch (info->arg.event_passing) {
345 case SNDRV_SEQ_OSS_PROCESS_EVENTS:
346 if (! info->ch || ch < 0 || ch >= info->nr_voices) {
348 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev);
351 if (info->ch[ch].note >= 0) {
352 note = info->ch[ch].note;
353 info->ch[ch].vel = 0;
354 info->ch[ch].note = -1;
355 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, note, vel, ev);
357 return -EINVAL; /* invalid */
359 case SNDRV_SEQ_OSS_PASS_EVENTS:
360 case SNDRV_SEQ_OSS_PROCESS_KEYPRESS:
361 /* pass the event anyway */
362 return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, note, vel, ev);
369 * create a note event
372 set_note_event(struct seq_oss_devinfo *dp, int dev, int type, int ch, int note, int vel, struct snd_seq_event *ev)
374 if (! snd_seq_oss_synth_is_valid(dp, dev))
378 snd_seq_oss_synth_addr(dp, dev, ev);
379 ev->data.note.channel = ch;
380 ev->data.note.note = note;
381 ev->data.note.velocity = vel;
387 * create a control event
390 set_control_event(struct seq_oss_devinfo *dp, int dev, int type, int ch, int param, int val, struct snd_seq_event *ev)
392 if (! snd_seq_oss_synth_is_valid(dp, dev))
396 snd_seq_oss_synth_addr(dp, dev, ev);
397 ev->data.control.channel = ch;
398 ev->data.control.param = param;
399 ev->data.control.value = val;
405 * create an echo event
408 set_echo_event(struct seq_oss_devinfo *dp, union evrec *rec, struct snd_seq_event *ev)
410 ev->type = SNDRV_SEQ_EVENT_ECHO;
411 /* echo back to itself */
412 snd_seq_oss_fill_addr(dp, ev, dp->addr.client, dp->addr.port);
413 memcpy(&ev->data, rec, LONG_EVENT_SIZE);
418 * event input callback from ALSA sequencer:
419 * the echo event is processed here.
422 snd_seq_oss_event_input(struct snd_seq_event *ev, int direct, void *private_data,
425 struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data;
428 if (ev->type != SNDRV_SEQ_EVENT_ECHO)
429 return snd_seq_oss_midi_input(ev, direct, private_data);
431 if (ev->source.client != dp->cseq)
432 return 0; /* ignored */
434 rec = (union evrec*)&ev->data;
435 if (rec->s.code == SEQ_SYNCTIMER) {
437 snd_seq_oss_writeq_wakeup(dp->writeq, rec->t.time);
440 /* echo back event */
441 if (dp->readq == NULL)
443 snd_seq_oss_readq_put_event(dp->readq, rec);