11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * OSS compatible sequencer driver 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de> 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 81da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 91da177e4SLinus Torvalds * (at your option) any later version. 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 121da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 131da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 141da177e4SLinus Torvalds * GNU General Public License for more details. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 171da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 181da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 191da177e4SLinus Torvalds */ 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds #include "seq_oss_device.h" 221da177e4SLinus Torvalds #include "seq_oss_synth.h" 231da177e4SLinus Torvalds #include "seq_oss_midi.h" 241da177e4SLinus Torvalds #include "seq_oss_event.h" 251da177e4SLinus Torvalds #include "seq_oss_timer.h" 261da177e4SLinus Torvalds #include <sound/seq_oss_legacy.h> 271da177e4SLinus Torvalds #include "seq_oss_readq.h" 281da177e4SLinus Torvalds #include "seq_oss_writeq.h" 298d218dd8STakashi Iwai #include <linux/nospec.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds /* 331da177e4SLinus Torvalds * prototypes 341da177e4SLinus Torvalds */ 35080dece3STakashi Iwai static int extended_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev); 36080dece3STakashi Iwai static int chn_voice_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev); 37080dece3STakashi Iwai static int chn_common_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev); 38080dece3STakashi Iwai static int timing_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev); 39080dece3STakashi Iwai static int local_event(struct seq_oss_devinfo *dp, union evrec *event_rec, struct snd_seq_event *ev); 40080dece3STakashi Iwai static int old_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev); 41080dece3STakashi Iwai static int note_on_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev); 42080dece3STakashi Iwai static int note_off_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev); 43080dece3STakashi Iwai 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); 44080dece3STakashi Iwai 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); 45080dece3STakashi Iwai static int set_echo_event(struct seq_oss_devinfo *dp, union evrec *rec, struct snd_seq_event *ev); 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds /* 491da177e4SLinus Torvalds * convert an OSS event to ALSA event 501da177e4SLinus Torvalds * return 0 : enqueued 511da177e4SLinus Torvalds * non-zero : invalid - ignored 521da177e4SLinus Torvalds */ 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds int 55080dece3STakashi Iwai snd_seq_oss_process_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev) 561da177e4SLinus Torvalds { 571da177e4SLinus Torvalds switch (q->s.code) { 581da177e4SLinus Torvalds case SEQ_EXTENDED: 591da177e4SLinus Torvalds return extended_event(dp, q, ev); 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds case EV_CHN_VOICE: 621da177e4SLinus Torvalds return chn_voice_event(dp, q, ev); 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds case EV_CHN_COMMON: 651da177e4SLinus Torvalds return chn_common_event(dp, q, ev); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds case EV_TIMING: 681da177e4SLinus Torvalds return timing_event(dp, q, ev); 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds case EV_SEQ_LOCAL: 711da177e4SLinus Torvalds return local_event(dp, q, ev); 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds case EV_SYSEX: 741da177e4SLinus Torvalds return snd_seq_oss_synth_sysex(dp, q->x.dev, q->x.buf, ev); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds case SEQ_MIDIPUTC: 771da177e4SLinus Torvalds if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) 781da177e4SLinus Torvalds return -EINVAL; 791da177e4SLinus Torvalds /* put a midi byte */ 801da177e4SLinus Torvalds if (! is_write_mode(dp->file_mode)) 811da177e4SLinus Torvalds break; 821da177e4SLinus Torvalds if (snd_seq_oss_midi_open(dp, q->s.dev, SNDRV_SEQ_OSS_FILE_WRITE)) 831da177e4SLinus Torvalds break; 841da177e4SLinus Torvalds if (snd_seq_oss_midi_filemode(dp, q->s.dev) & SNDRV_SEQ_OSS_FILE_WRITE) 851da177e4SLinus Torvalds return snd_seq_oss_midi_putc(dp, q->s.dev, q->s.parm1, ev); 861da177e4SLinus Torvalds break; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds case SEQ_ECHO: 891da177e4SLinus Torvalds if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) 901da177e4SLinus Torvalds return -EINVAL; 911da177e4SLinus Torvalds return set_echo_event(dp, q, ev); 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds case SEQ_PRIVATE: 941da177e4SLinus Torvalds if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) 951da177e4SLinus Torvalds return -EINVAL; 961da177e4SLinus Torvalds return snd_seq_oss_synth_raw_event(dp, q->c[1], q->c, ev); 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds default: 991da177e4SLinus Torvalds if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) 1001da177e4SLinus Torvalds return -EINVAL; 1011da177e4SLinus Torvalds return old_event(dp, q, ev); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds return -EINVAL; 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds /* old type events: mode1 only */ 1071da177e4SLinus Torvalds static int 108080dece3STakashi Iwai old_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds switch (q->s.code) { 1111da177e4SLinus Torvalds case SEQ_NOTEOFF: 1121da177e4SLinus Torvalds return note_off_event(dp, 0, q->n.chn, q->n.note, q->n.vel, ev); 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds case SEQ_NOTEON: 1151da177e4SLinus Torvalds return note_on_event(dp, 0, q->n.chn, q->n.note, q->n.vel, ev); 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds case SEQ_WAIT: 1181da177e4SLinus Torvalds /* skip */ 1191da177e4SLinus Torvalds break; 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds case SEQ_PGMCHANGE: 1221da177e4SLinus Torvalds return set_control_event(dp, 0, SNDRV_SEQ_EVENT_PGMCHANGE, 1231da177e4SLinus Torvalds q->n.chn, 0, q->n.note, ev); 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds case SEQ_SYNCTIMER: 1261da177e4SLinus Torvalds return snd_seq_oss_timer_reset(dp->timer); 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds return -EINVAL; 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds /* 8bytes extended event: mode1 only */ 1331da177e4SLinus Torvalds static int 134080dece3STakashi Iwai extended_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds int val; 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds switch (q->e.cmd) { 1391da177e4SLinus Torvalds case SEQ_NOTEOFF: 1401da177e4SLinus Torvalds return note_off_event(dp, q->e.dev, q->e.chn, q->e.p1, q->e.p2, ev); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds case SEQ_NOTEON: 1431da177e4SLinus Torvalds return note_on_event(dp, q->e.dev, q->e.chn, q->e.p1, q->e.p2, ev); 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds case SEQ_PGMCHANGE: 1461da177e4SLinus Torvalds return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_PGMCHANGE, 1471da177e4SLinus Torvalds q->e.chn, 0, q->e.p1, ev); 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds case SEQ_AFTERTOUCH: 1501da177e4SLinus Torvalds return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_CHANPRESS, 1511da177e4SLinus Torvalds q->e.chn, 0, q->e.p1, ev); 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds case SEQ_BALANCE: 1541da177e4SLinus Torvalds /* convert -128:127 to 0:127 */ 1551da177e4SLinus Torvalds val = (char)q->e.p1; 1561da177e4SLinus Torvalds val = (val + 128) / 2; 1571da177e4SLinus Torvalds return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_CONTROLLER, 1581da177e4SLinus Torvalds q->e.chn, CTL_PAN, val, ev); 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds case SEQ_CONTROLLER: 1611da177e4SLinus Torvalds val = ((short)q->e.p3 << 8) | (short)q->e.p2; 1621da177e4SLinus Torvalds switch (q->e.p1) { 1631da177e4SLinus Torvalds case CTRL_PITCH_BENDER: /* SEQ1 V2 control */ 1641da177e4SLinus Torvalds /* -0x2000:0x1fff */ 1651da177e4SLinus Torvalds return set_control_event(dp, q->e.dev, 1661da177e4SLinus Torvalds SNDRV_SEQ_EVENT_PITCHBEND, 1671da177e4SLinus Torvalds q->e.chn, 0, val, ev); 1681da177e4SLinus Torvalds case CTRL_PITCH_BENDER_RANGE: 1691da177e4SLinus Torvalds /* conversion: 100/semitone -> 128/semitone */ 1701da177e4SLinus Torvalds return set_control_event(dp, q->e.dev, 1711da177e4SLinus Torvalds SNDRV_SEQ_EVENT_REGPARAM, 1721da177e4SLinus Torvalds q->e.chn, 0, val*128/100, ev); 1731da177e4SLinus Torvalds default: 1741da177e4SLinus Torvalds return set_control_event(dp, q->e.dev, 1751da177e4SLinus Torvalds SNDRV_SEQ_EVENT_CONTROL14, 1761da177e4SLinus Torvalds q->e.chn, q->e.p1, val, ev); 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds case SEQ_VOLMODE: 1801da177e4SLinus Torvalds return snd_seq_oss_synth_raw_event(dp, q->e.dev, q->c, ev); 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds return -EINVAL; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds /* channel voice events: mode1 and 2 */ 1871da177e4SLinus Torvalds static int 188080dece3STakashi Iwai chn_voice_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev) 1891da177e4SLinus Torvalds { 1901da177e4SLinus Torvalds if (q->v.chn >= 32) 1911da177e4SLinus Torvalds return -EINVAL; 1921da177e4SLinus Torvalds switch (q->v.cmd) { 1931da177e4SLinus Torvalds case MIDI_NOTEON: 1941da177e4SLinus Torvalds return note_on_event(dp, q->v.dev, q->v.chn, q->v.note, q->v.parm, ev); 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds case MIDI_NOTEOFF: 1971da177e4SLinus Torvalds return note_off_event(dp, q->v.dev, q->v.chn, q->v.note, q->v.parm, ev); 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds case MIDI_KEY_PRESSURE: 2001da177e4SLinus Torvalds return set_note_event(dp, q->v.dev, SNDRV_SEQ_EVENT_KEYPRESS, 2011da177e4SLinus Torvalds q->v.chn, q->v.note, q->v.parm, ev); 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds return -EINVAL; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds /* channel common events: mode1 and 2 */ 2081da177e4SLinus Torvalds static int 209080dece3STakashi Iwai chn_common_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev) 2101da177e4SLinus Torvalds { 2111da177e4SLinus Torvalds if (q->l.chn >= 32) 2121da177e4SLinus Torvalds return -EINVAL; 2131da177e4SLinus Torvalds switch (q->l.cmd) { 2141da177e4SLinus Torvalds case MIDI_PGM_CHANGE: 2151da177e4SLinus Torvalds return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_PGMCHANGE, 2161da177e4SLinus Torvalds q->l.chn, 0, q->l.p1, ev); 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds case MIDI_CTL_CHANGE: 2191da177e4SLinus Torvalds return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_CONTROLLER, 2201da177e4SLinus Torvalds q->l.chn, q->l.p1, q->l.val, ev); 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds case MIDI_PITCH_BEND: 2231da177e4SLinus Torvalds /* conversion: 0:0x3fff -> -0x2000:0x1fff */ 2241da177e4SLinus Torvalds return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_PITCHBEND, 2251da177e4SLinus Torvalds q->l.chn, 0, q->l.val - 8192, ev); 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds case MIDI_CHN_PRESSURE: 2281da177e4SLinus Torvalds return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_CHANPRESS, 2291da177e4SLinus Torvalds q->l.chn, 0, q->l.val, ev); 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds return -EINVAL; 2321da177e4SLinus Torvalds } 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds /* timer events: mode1 and mode2 */ 2351da177e4SLinus Torvalds static int 236080dece3STakashi Iwai timing_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev) 2371da177e4SLinus Torvalds { 2381da177e4SLinus Torvalds switch (q->t.cmd) { 2391da177e4SLinus Torvalds case TMR_ECHO: 2401da177e4SLinus Torvalds if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) 2411da177e4SLinus Torvalds return set_echo_event(dp, q, ev); 2421da177e4SLinus Torvalds else { 243080dece3STakashi Iwai union evrec tmp; 2441da177e4SLinus Torvalds memset(&tmp, 0, sizeof(tmp)); 2451da177e4SLinus Torvalds /* XXX: only for little-endian! */ 2461da177e4SLinus Torvalds tmp.echo = (q->t.time << 8) | SEQ_ECHO; 2471da177e4SLinus Torvalds return set_echo_event(dp, &tmp, ev); 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds case TMR_STOP: 2511da177e4SLinus Torvalds if (dp->seq_mode) 2521da177e4SLinus Torvalds return snd_seq_oss_timer_stop(dp->timer); 2531da177e4SLinus Torvalds return 0; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds case TMR_CONTINUE: 2561da177e4SLinus Torvalds if (dp->seq_mode) 2571da177e4SLinus Torvalds return snd_seq_oss_timer_continue(dp->timer); 2581da177e4SLinus Torvalds return 0; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds case TMR_TEMPO: 2611da177e4SLinus Torvalds if (dp->seq_mode) 2621da177e4SLinus Torvalds return snd_seq_oss_timer_tempo(dp->timer, q->t.time); 2631da177e4SLinus Torvalds return 0; 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds return -EINVAL; 2671da177e4SLinus Torvalds } 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds /* local events: mode1 and 2 */ 2701da177e4SLinus Torvalds static int 271080dece3STakashi Iwai local_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev) 2721da177e4SLinus Torvalds { 2731da177e4SLinus Torvalds return -EINVAL; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * process note-on event for OSS synth 2781da177e4SLinus Torvalds * three different modes are available: 2791da177e4SLinus Torvalds * - SNDRV_SEQ_OSS_PROCESS_EVENTS (for one-voice per channel mode) 2801da177e4SLinus Torvalds * Accept note 255 as volume change. 2811da177e4SLinus Torvalds * - SNDRV_SEQ_OSS_PASS_EVENTS 2821da177e4SLinus Torvalds * Pass all events to lowlevel driver anyway 2831da177e4SLinus Torvalds * - SNDRV_SEQ_OSS_PROCESS_KEYPRESS (mostly for Emu8000) 2841da177e4SLinus Torvalds * Use key-pressure if note >= 128 2851da177e4SLinus Torvalds */ 2861da177e4SLinus Torvalds static int 287080dece3STakashi Iwai note_on_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev) 2881da177e4SLinus Torvalds { 28985c50a58SDan Carpenter struct seq_oss_synthinfo *info; 29085c50a58SDan Carpenter 2918d218dd8STakashi Iwai info = snd_seq_oss_synth_info(dp, dev); 2928d218dd8STakashi Iwai if (!info) 29385c50a58SDan Carpenter return -ENXIO; 29485c50a58SDan Carpenter 2951da177e4SLinus Torvalds switch (info->arg.event_passing) { 2961da177e4SLinus Torvalds case SNDRV_SEQ_OSS_PROCESS_EVENTS: 2971da177e4SLinus Torvalds if (! info->ch || ch < 0 || ch >= info->nr_voices) { 2981da177e4SLinus Torvalds /* pass directly */ 2991da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 3028d218dd8STakashi Iwai ch = array_index_nospec(ch, info->nr_voices); 3031da177e4SLinus Torvalds if (note == 255 && info->ch[ch].note >= 0) { 3041da177e4SLinus Torvalds /* volume control */ 3051da177e4SLinus Torvalds int type; 3061da177e4SLinus Torvalds //if (! vel) 3071da177e4SLinus Torvalds /* set volume to zero -- note off */ 3081da177e4SLinus Torvalds // type = SNDRV_SEQ_EVENT_NOTEOFF; 3091da177e4SLinus Torvalds //else 3101da177e4SLinus Torvalds if (info->ch[ch].vel) 3111da177e4SLinus Torvalds /* sample already started -- volume change */ 3121da177e4SLinus Torvalds type = SNDRV_SEQ_EVENT_KEYPRESS; 3131da177e4SLinus Torvalds else 3141da177e4SLinus Torvalds /* sample not started -- start now */ 3151da177e4SLinus Torvalds type = SNDRV_SEQ_EVENT_NOTEON; 3161da177e4SLinus Torvalds info->ch[ch].vel = vel; 3171da177e4SLinus Torvalds return set_note_event(dp, dev, type, ch, info->ch[ch].note, vel, ev); 3181da177e4SLinus Torvalds } else if (note >= 128) 3191da177e4SLinus Torvalds return -EINVAL; /* invalid */ 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds if (note != info->ch[ch].note && info->ch[ch].note >= 0) 3221da177e4SLinus Torvalds /* note changed - note off at beginning */ 3231da177e4SLinus Torvalds set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, info->ch[ch].note, 0, ev); 3241da177e4SLinus Torvalds /* set current status */ 3251da177e4SLinus Torvalds info->ch[ch].note = note; 3261da177e4SLinus Torvalds info->ch[ch].vel = vel; 3271da177e4SLinus Torvalds if (vel) /* non-zero velocity - start the note now */ 3281da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); 3291da177e4SLinus Torvalds return -EINVAL; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds case SNDRV_SEQ_OSS_PASS_EVENTS: 3321da177e4SLinus Torvalds /* pass the event anyway */ 3331da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds case SNDRV_SEQ_OSS_PROCESS_KEYPRESS: 3361da177e4SLinus Torvalds if (note >= 128) /* key pressure: shifted by 128 */ 3371da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_KEYPRESS, ch, note - 128, vel, ev); 3381da177e4SLinus Torvalds else /* normal note-on event */ 3391da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds return -EINVAL; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds /* 3451da177e4SLinus Torvalds * process note-off event for OSS synth 3461da177e4SLinus Torvalds */ 3471da177e4SLinus Torvalds static int 348080dece3STakashi Iwai note_off_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev) 3491da177e4SLinus Torvalds { 35085c50a58SDan Carpenter struct seq_oss_synthinfo *info; 35185c50a58SDan Carpenter 3528d218dd8STakashi Iwai info = snd_seq_oss_synth_info(dp, dev); 3538d218dd8STakashi Iwai if (!info) 35485c50a58SDan Carpenter return -ENXIO; 35585c50a58SDan Carpenter 3561da177e4SLinus Torvalds switch (info->arg.event_passing) { 3571da177e4SLinus Torvalds case SNDRV_SEQ_OSS_PROCESS_EVENTS: 3581da177e4SLinus Torvalds if (! info->ch || ch < 0 || ch >= info->nr_voices) { 3591da177e4SLinus Torvalds /* pass directly */ 3601da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); 3611da177e4SLinus Torvalds } 3621da177e4SLinus Torvalds 3638d218dd8STakashi Iwai ch = array_index_nospec(ch, info->nr_voices); 3641da177e4SLinus Torvalds if (info->ch[ch].note >= 0) { 3651da177e4SLinus Torvalds note = info->ch[ch].note; 3661da177e4SLinus Torvalds info->ch[ch].vel = 0; 3671da177e4SLinus Torvalds info->ch[ch].note = -1; 3681da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, note, vel, ev); 3691da177e4SLinus Torvalds } 3701da177e4SLinus Torvalds return -EINVAL; /* invalid */ 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds case SNDRV_SEQ_OSS_PASS_EVENTS: 3731da177e4SLinus Torvalds case SNDRV_SEQ_OSS_PROCESS_KEYPRESS: 3741da177e4SLinus Torvalds /* pass the event anyway */ 3751da177e4SLinus Torvalds return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, note, vel, ev); 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds return -EINVAL; 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds /* 3821da177e4SLinus Torvalds * create a note event 3831da177e4SLinus Torvalds */ 3841da177e4SLinus Torvalds static int 385080dece3STakashi Iwai set_note_event(struct seq_oss_devinfo *dp, int dev, int type, int ch, int note, int vel, struct snd_seq_event *ev) 3861da177e4SLinus Torvalds { 3878d218dd8STakashi Iwai if (!snd_seq_oss_synth_info(dp, dev)) 3881da177e4SLinus Torvalds return -ENXIO; 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds ev->type = type; 3911da177e4SLinus Torvalds snd_seq_oss_synth_addr(dp, dev, ev); 3921da177e4SLinus Torvalds ev->data.note.channel = ch; 3931da177e4SLinus Torvalds ev->data.note.note = note; 3941da177e4SLinus Torvalds ev->data.note.velocity = vel; 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds return 0; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds /* 4001da177e4SLinus Torvalds * create a control event 4011da177e4SLinus Torvalds */ 4021da177e4SLinus Torvalds static int 403080dece3STakashi Iwai set_control_event(struct seq_oss_devinfo *dp, int dev, int type, int ch, int param, int val, struct snd_seq_event *ev) 4041da177e4SLinus Torvalds { 4058d218dd8STakashi Iwai if (!snd_seq_oss_synth_info(dp, dev)) 4061da177e4SLinus Torvalds return -ENXIO; 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds ev->type = type; 4091da177e4SLinus Torvalds snd_seq_oss_synth_addr(dp, dev, ev); 4101da177e4SLinus Torvalds ev->data.control.channel = ch; 4111da177e4SLinus Torvalds ev->data.control.param = param; 4121da177e4SLinus Torvalds ev->data.control.value = val; 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds return 0; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds /* 4181da177e4SLinus Torvalds * create an echo event 4191da177e4SLinus Torvalds */ 4201da177e4SLinus Torvalds static int 421080dece3STakashi Iwai set_echo_event(struct seq_oss_devinfo *dp, union evrec *rec, struct snd_seq_event *ev) 4221da177e4SLinus Torvalds { 4231da177e4SLinus Torvalds ev->type = SNDRV_SEQ_EVENT_ECHO; 4241da177e4SLinus Torvalds /* echo back to itself */ 4251da177e4SLinus Torvalds snd_seq_oss_fill_addr(dp, ev, dp->addr.client, dp->addr.port); 4261da177e4SLinus Torvalds memcpy(&ev->data, rec, LONG_EVENT_SIZE); 4271da177e4SLinus Torvalds return 0; 4281da177e4SLinus Torvalds } 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds /* 4311da177e4SLinus Torvalds * event input callback from ALSA sequencer: 4321da177e4SLinus Torvalds * the echo event is processed here. 4331da177e4SLinus Torvalds */ 4341da177e4SLinus Torvalds int 435080dece3STakashi Iwai snd_seq_oss_event_input(struct snd_seq_event *ev, int direct, void *private_data, 4361da177e4SLinus Torvalds int atomic, int hop) 4371da177e4SLinus Torvalds { 438080dece3STakashi Iwai struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data; 439080dece3STakashi Iwai union evrec *rec; 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds if (ev->type != SNDRV_SEQ_EVENT_ECHO) 4421da177e4SLinus Torvalds return snd_seq_oss_midi_input(ev, direct, private_data); 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds if (ev->source.client != dp->cseq) 4451da177e4SLinus Torvalds return 0; /* ignored */ 4461da177e4SLinus Torvalds 447080dece3STakashi Iwai rec = (union evrec*)&ev->data; 4481da177e4SLinus Torvalds if (rec->s.code == SEQ_SYNCTIMER) { 4491da177e4SLinus Torvalds /* sync echo back */ 4501da177e4SLinus Torvalds snd_seq_oss_writeq_wakeup(dp->writeq, rec->t.time); 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds } else { 4531da177e4SLinus Torvalds /* echo back event */ 4541da177e4SLinus Torvalds if (dp->readq == NULL) 4551da177e4SLinus Torvalds return 0; 4561da177e4SLinus Torvalds snd_seq_oss_readq_put_event(dp->readq, rec); 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds return 0; 4591da177e4SLinus Torvalds } 4601da177e4SLinus Torvalds 461