diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/core/seq/oss/seq_oss_event.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'sound/core/seq/oss/seq_oss_event.c')
-rw-r--r-- | sound/core/seq/oss/seq_oss_event.c | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/sound/core/seq/oss/seq_oss_event.c b/sound/core/seq/oss/seq_oss_event.c new file mode 100644 index 0000000..58e52dd --- /dev/null +++ b/sound/core/seq/oss/seq_oss_event.c @@ -0,0 +1,447 @@ +/* + * OSS compatible sequencer driver + * + * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "seq_oss_device.h" +#include "seq_oss_synth.h" +#include "seq_oss_midi.h" +#include "seq_oss_event.h" +#include "seq_oss_timer.h" +#include <sound/seq_oss_legacy.h> +#include "seq_oss_readq.h" +#include "seq_oss_writeq.h" + + +/* + * prototypes + */ +static int extended_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev); +static int chn_voice_event(seq_oss_devinfo_t *dp, evrec_t *event_rec, snd_seq_event_t *ev); +static int chn_common_event(seq_oss_devinfo_t *dp, evrec_t *event_rec, snd_seq_event_t *ev); +static int timing_event(seq_oss_devinfo_t *dp, evrec_t *event_rec, snd_seq_event_t *ev); +static int local_event(seq_oss_devinfo_t *dp, evrec_t *event_rec, snd_seq_event_t *ev); +static int old_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev); +static int note_on_event(seq_oss_devinfo_t *dp, int dev, int ch, int note, int vel, snd_seq_event_t *ev); +static int note_off_event(seq_oss_devinfo_t *dp, int dev, int ch, int note, int vel, snd_seq_event_t *ev); +static int set_note_event(seq_oss_devinfo_t *dp, int dev, int type, int ch, int note, int vel, snd_seq_event_t *ev); +static int set_control_event(seq_oss_devinfo_t *dp, int dev, int type, int ch, int param, int val, snd_seq_event_t *ev); +static int set_echo_event(seq_oss_devinfo_t *dp, evrec_t *rec, snd_seq_event_t *ev); + + +/* + * convert an OSS event to ALSA event + * return 0 : enqueued + * non-zero : invalid - ignored + */ + +int +snd_seq_oss_process_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev) +{ + switch (q->s.code) { + case SEQ_EXTENDED: + return extended_event(dp, q, ev); + + case EV_CHN_VOICE: + return chn_voice_event(dp, q, ev); + + case EV_CHN_COMMON: + return chn_common_event(dp, q, ev); + + case EV_TIMING: + return timing_event(dp, q, ev); + + case EV_SEQ_LOCAL: + return local_event(dp, q, ev); + + case EV_SYSEX: + return snd_seq_oss_synth_sysex(dp, q->x.dev, q->x.buf, ev); + + case SEQ_MIDIPUTC: + if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) + return -EINVAL; + /* put a midi byte */ + if (! is_write_mode(dp->file_mode)) + break; + if (snd_seq_oss_midi_open(dp, q->s.dev, SNDRV_SEQ_OSS_FILE_WRITE)) + break; + if (snd_seq_oss_midi_filemode(dp, q->s.dev) & SNDRV_SEQ_OSS_FILE_WRITE) + return snd_seq_oss_midi_putc(dp, q->s.dev, q->s.parm1, ev); + break; + + case SEQ_ECHO: + if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) + return -EINVAL; + return set_echo_event(dp, q, ev); + + case SEQ_PRIVATE: + if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) + return -EINVAL; + return snd_seq_oss_synth_raw_event(dp, q->c[1], q->c, ev); + + default: + if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) + return -EINVAL; + return old_event(dp, q, ev); + } + return -EINVAL; +} + +/* old type events: mode1 only */ +static int +old_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev) +{ + switch (q->s.code) { + case SEQ_NOTEOFF: + return note_off_event(dp, 0, q->n.chn, q->n.note, q->n.vel, ev); + + case SEQ_NOTEON: + return note_on_event(dp, 0, q->n.chn, q->n.note, q->n.vel, ev); + + case SEQ_WAIT: + /* skip */ + break; + + case SEQ_PGMCHANGE: + return set_control_event(dp, 0, SNDRV_SEQ_EVENT_PGMCHANGE, + q->n.chn, 0, q->n.note, ev); + + case SEQ_SYNCTIMER: + return snd_seq_oss_timer_reset(dp->timer); + } + + return -EINVAL; +} + +/* 8bytes extended event: mode1 only */ +static int +extended_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev) +{ + int val; + + switch (q->e.cmd) { + case SEQ_NOTEOFF: + return note_off_event(dp, q->e.dev, q->e.chn, q->e.p1, q->e.p2, ev); + + case SEQ_NOTEON: + return note_on_event(dp, q->e.dev, q->e.chn, q->e.p1, q->e.p2, ev); + + case SEQ_PGMCHANGE: + return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_PGMCHANGE, + q->e.chn, 0, q->e.p1, ev); + + case SEQ_AFTERTOUCH: + return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_CHANPRESS, + q->e.chn, 0, q->e.p1, ev); + + case SEQ_BALANCE: + /* convert -128:127 to 0:127 */ + val = (char)q->e.p1; + val = (val + 128) / 2; + return set_control_event(dp, q->e.dev, SNDRV_SEQ_EVENT_CONTROLLER, + q->e.chn, CTL_PAN, val, ev); + + case SEQ_CONTROLLER: + val = ((short)q->e.p3 << 8) | (short)q->e.p2; + switch (q->e.p1) { + case CTRL_PITCH_BENDER: /* SEQ1 V2 control */ + /* -0x2000:0x1fff */ + return set_control_event(dp, q->e.dev, + SNDRV_SEQ_EVENT_PITCHBEND, + q->e.chn, 0, val, ev); + case CTRL_PITCH_BENDER_RANGE: + /* conversion: 100/semitone -> 128/semitone */ + return set_control_event(dp, q->e.dev, + SNDRV_SEQ_EVENT_REGPARAM, + q->e.chn, 0, val*128/100, ev); + default: + return set_control_event(dp, q->e.dev, + SNDRV_SEQ_EVENT_CONTROL14, + q->e.chn, q->e.p1, val, ev); + } + + case SEQ_VOLMODE: + return snd_seq_oss_synth_raw_event(dp, q->e.dev, q->c, ev); + + } + return -EINVAL; +} + +/* channel voice events: mode1 and 2 */ +static int +chn_voice_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev) +{ + if (q->v.chn >= 32) + return -EINVAL; + switch (q->v.cmd) { + case MIDI_NOTEON: + return note_on_event(dp, q->v.dev, q->v.chn, q->v.note, q->v.parm, ev); + + case MIDI_NOTEOFF: + return note_off_event(dp, q->v.dev, q->v.chn, q->v.note, q->v.parm, ev); + + case MIDI_KEY_PRESSURE: + return set_note_event(dp, q->v.dev, SNDRV_SEQ_EVENT_KEYPRESS, + q->v.chn, q->v.note, q->v.parm, ev); + + } + return -EINVAL; +} + +/* channel common events: mode1 and 2 */ +static int +chn_common_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev) +{ + if (q->l.chn >= 32) + return -EINVAL; + switch (q->l.cmd) { + case MIDI_PGM_CHANGE: + return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_PGMCHANGE, + q->l.chn, 0, q->l.p1, ev); + + case MIDI_CTL_CHANGE: + return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_CONTROLLER, + q->l.chn, q->l.p1, q->l.val, ev); + + case MIDI_PITCH_BEND: + /* conversion: 0:0x3fff -> -0x2000:0x1fff */ + return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_PITCHBEND, + q->l.chn, 0, q->l.val - 8192, ev); + + case MIDI_CHN_PRESSURE: + return set_control_event(dp, q->l.dev, SNDRV_SEQ_EVENT_CHANPRESS, + q->l.chn, 0, q->l.val, ev); + } + return -EINVAL; +} + +/* timer events: mode1 and mode2 */ +static int +timing_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev) +{ + switch (q->t.cmd) { + case TMR_ECHO: + if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) + return set_echo_event(dp, q, ev); + else { + evrec_t tmp; + memset(&tmp, 0, sizeof(tmp)); + /* XXX: only for little-endian! */ + tmp.echo = (q->t.time << 8) | SEQ_ECHO; + return set_echo_event(dp, &tmp, ev); + } + + case TMR_STOP: + if (dp->seq_mode) + return snd_seq_oss_timer_stop(dp->timer); + return 0; + + case TMR_CONTINUE: + if (dp->seq_mode) + return snd_seq_oss_timer_continue(dp->timer); + return 0; + + case TMR_TEMPO: + if (dp->seq_mode) + return snd_seq_oss_timer_tempo(dp->timer, q->t.time); + return 0; + } + + return -EINVAL; +} + +/* local events: mode1 and 2 */ +static int +local_event(seq_oss_devinfo_t *dp, evrec_t *q, snd_seq_event_t *ev) +{ + return -EINVAL; +} + +/* + * process note-on event for OSS synth + * three different modes are available: + * - SNDRV_SEQ_OSS_PROCESS_EVENTS (for one-voice per channel mode) + * Accept note 255 as volume change. + * - SNDRV_SEQ_OSS_PASS_EVENTS + * Pass all events to lowlevel driver anyway + * - SNDRV_SEQ_OSS_PROCESS_KEYPRESS (mostly for Emu8000) + * Use key-pressure if note >= 128 + */ +static int +note_on_event(seq_oss_devinfo_t *dp, int dev, int ch, int note, int vel, snd_seq_event_t *ev) +{ + seq_oss_synthinfo_t *info = &dp->synths[dev]; + switch (info->arg.event_passing) { + case SNDRV_SEQ_OSS_PROCESS_EVENTS: + if (! info->ch || ch < 0 || ch >= info->nr_voices) { + /* pass directly */ + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); + } + + if (note == 255 && info->ch[ch].note >= 0) { + /* volume control */ + int type; + //if (! vel) + /* set volume to zero -- note off */ + // type = SNDRV_SEQ_EVENT_NOTEOFF; + //else + if (info->ch[ch].vel) + /* sample already started -- volume change */ + type = SNDRV_SEQ_EVENT_KEYPRESS; + else + /* sample not started -- start now */ + type = SNDRV_SEQ_EVENT_NOTEON; + info->ch[ch].vel = vel; + return set_note_event(dp, dev, type, ch, info->ch[ch].note, vel, ev); + } else if (note >= 128) + return -EINVAL; /* invalid */ + + if (note != info->ch[ch].note && info->ch[ch].note >= 0) + /* note changed - note off at beginning */ + set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, info->ch[ch].note, 0, ev); + /* set current status */ + info->ch[ch].note = note; + info->ch[ch].vel = vel; + if (vel) /* non-zero velocity - start the note now */ + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); + return -EINVAL; + + case SNDRV_SEQ_OSS_PASS_EVENTS: + /* pass the event anyway */ + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); + + case SNDRV_SEQ_OSS_PROCESS_KEYPRESS: + if (note >= 128) /* key pressure: shifted by 128 */ + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_KEYPRESS, ch, note - 128, vel, ev); + else /* normal note-on event */ + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); + } + return -EINVAL; +} + +/* + * process note-off event for OSS synth + */ +static int +note_off_event(seq_oss_devinfo_t *dp, int dev, int ch, int note, int vel, snd_seq_event_t *ev) +{ + seq_oss_synthinfo_t *info = &dp->synths[dev]; + switch (info->arg.event_passing) { + case SNDRV_SEQ_OSS_PROCESS_EVENTS: + if (! info->ch || ch < 0 || ch >= info->nr_voices) { + /* pass directly */ + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEON, ch, note, vel, ev); + } + + if (info->ch[ch].note >= 0) { + note = info->ch[ch].note; + info->ch[ch].vel = 0; + info->ch[ch].note = -1; + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, note, vel, ev); + } + return -EINVAL; /* invalid */ + + case SNDRV_SEQ_OSS_PASS_EVENTS: + case SNDRV_SEQ_OSS_PROCESS_KEYPRESS: + /* pass the event anyway */ + return set_note_event(dp, dev, SNDRV_SEQ_EVENT_NOTEOFF, ch, note, vel, ev); + + } + return -EINVAL; +} + +/* + * create a note event + */ +static int +set_note_event(seq_oss_devinfo_t *dp, int dev, int type, int ch, int note, int vel, snd_seq_event_t *ev) +{ + if (! snd_seq_oss_synth_is_valid(dp, dev)) + return -ENXIO; + + ev->type = type; + snd_seq_oss_synth_addr(dp, dev, ev); + ev->data.note.channel = ch; + ev->data.note.note = note; + ev->data.note.velocity = vel; + + return 0; +} + +/* + * create a control event + */ +static int +set_control_event(seq_oss_devinfo_t *dp, int dev, int type, int ch, int param, int val, snd_seq_event_t *ev) +{ + if (! snd_seq_oss_synth_is_valid(dp, dev)) + return -ENXIO; + + ev->type = type; + snd_seq_oss_synth_addr(dp, dev, ev); + ev->data.control.channel = ch; + ev->data.control.param = param; + ev->data.control.value = val; + + return 0; +} + +/* + * create an echo event + */ +static int +set_echo_event(seq_oss_devinfo_t *dp, evrec_t *rec, snd_seq_event_t *ev) +{ + ev->type = SNDRV_SEQ_EVENT_ECHO; + /* echo back to itself */ + snd_seq_oss_fill_addr(dp, ev, dp->addr.client, dp->addr.port); + memcpy(&ev->data, rec, LONG_EVENT_SIZE); + return 0; +} + +/* + * event input callback from ALSA sequencer: + * the echo event is processed here. + */ +int +snd_seq_oss_event_input(snd_seq_event_t *ev, int direct, void *private_data, + int atomic, int hop) +{ + seq_oss_devinfo_t *dp = (seq_oss_devinfo_t *)private_data; + evrec_t *rec; + + if (ev->type != SNDRV_SEQ_EVENT_ECHO) + return snd_seq_oss_midi_input(ev, direct, private_data); + + if (ev->source.client != dp->cseq) + return 0; /* ignored */ + + rec = (evrec_t*)&ev->data; + if (rec->s.code == SEQ_SYNCTIMER) { + /* sync echo back */ + snd_seq_oss_writeq_wakeup(dp->writeq, rec->t.time); + + } else { + /* echo back event */ + if (dp->readq == NULL) + return 0; + snd_seq_oss_readq_put_event(dp->readq, rec); + } + return 0; +} + |