* MIDI byte <-> sequencer event coder
*
* Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>,
- * Jaroslav Kysela <perex@suse.cz>
+ * Jaroslav Kysela <perex@perex.cz>
*
* 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
#include <sound/seq_midi_event.h>
#include <sound/asoundef.h>
-MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>, Jaroslav Kysela <perex@suse.cz>");
+MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>, Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("MIDI byte <-> sequencer event coder");
MODULE_LICENSE("GPL");
-/* queue type */
-/* from 0 to 7 are normal commands (note off, on, etc.) */
-#define ST_NOTEOFF 0
-#define ST_NOTEON 1
+/* event type, index into status_event[] */
+/* from 0 to 6 are normal commands (note off, on, etc.) for 0x9?-0xe? */
+#define ST_INVALID 7
#define ST_SPECIAL 8
#define ST_SYSEX ST_SPECIAL
/* from 8 to 15 are events for 0xf0-0xf7 */
void (*encode)(struct snd_midi_event *dev, struct snd_seq_event *ev);
void (*decode)(struct snd_seq_event *ev, unsigned char *buf);
} status_event[] = {
- /* 0x80 - 0xf0 */
- {SNDRV_SEQ_EVENT_NOTEOFF, 2, note_event, note_decode},
- {SNDRV_SEQ_EVENT_NOTEON, 2, note_event, note_decode},
- {SNDRV_SEQ_EVENT_KEYPRESS, 2, note_event, note_decode},
- {SNDRV_SEQ_EVENT_CONTROLLER, 2, two_param_ctrl_event, two_param_decode},
- {SNDRV_SEQ_EVENT_PGMCHANGE, 1, one_param_ctrl_event, one_param_decode},
- {SNDRV_SEQ_EVENT_CHANPRESS, 1, one_param_ctrl_event, one_param_decode},
- {SNDRV_SEQ_EVENT_PITCHBEND, 2, pitchbend_ctrl_event, pitchbend_decode},
- {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf0 */
+ /* 0x80 - 0xef */
+ {SNDRV_SEQ_EVENT_NOTEOFF, 2, note_event, note_decode},
+ {SNDRV_SEQ_EVENT_NOTEON, 2, note_event, note_decode},
+ {SNDRV_SEQ_EVENT_KEYPRESS, 2, note_event, note_decode},
+ {SNDRV_SEQ_EVENT_CONTROLLER, 2, two_param_ctrl_event, two_param_decode},
+ {SNDRV_SEQ_EVENT_PGMCHANGE, 1, one_param_ctrl_event, one_param_decode},
+ {SNDRV_SEQ_EVENT_CHANPRESS, 1, one_param_ctrl_event, one_param_decode},
+ {SNDRV_SEQ_EVENT_PITCHBEND, 2, pitchbend_ctrl_event, pitchbend_decode},
+ /* invalid */
+ {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL},
/* 0xf0 - 0xff */
- {SNDRV_SEQ_EVENT_SYSEX, 1, NULL, NULL}, /* sysex: 0xf0 */
- {SNDRV_SEQ_EVENT_QFRAME, 1, one_param_event, one_param_decode}, /* 0xf1 */
- {SNDRV_SEQ_EVENT_SONGPOS, 2, songpos_event, songpos_decode}, /* 0xf2 */
- {SNDRV_SEQ_EVENT_SONGSEL, 1, one_param_event, one_param_decode}, /* 0xf3 */
- {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf4 */
- {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf5 */
- {SNDRV_SEQ_EVENT_TUNE_REQUEST, 0, NULL, NULL}, /* 0xf6 */
- {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf7 */
- {SNDRV_SEQ_EVENT_CLOCK, 0, NULL, NULL}, /* 0xf8 */
- {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf9 */
- {SNDRV_SEQ_EVENT_START, 0, NULL, NULL}, /* 0xfa */
- {SNDRV_SEQ_EVENT_CONTINUE, 0, NULL, NULL}, /* 0xfb */
- {SNDRV_SEQ_EVENT_STOP, 0, NULL, NULL}, /* 0xfc */
- {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xfd */
- {SNDRV_SEQ_EVENT_SENSING, 0, NULL, NULL}, /* 0xfe */
- {SNDRV_SEQ_EVENT_RESET, 0, NULL, NULL}, /* 0xff */
+ {SNDRV_SEQ_EVENT_SYSEX, 1, NULL, NULL}, /* sysex: 0xf0 */
+ {SNDRV_SEQ_EVENT_QFRAME, 1, one_param_event, one_param_decode}, /* 0xf1 */
+ {SNDRV_SEQ_EVENT_SONGPOS, 2, songpos_event, songpos_decode}, /* 0xf2 */
+ {SNDRV_SEQ_EVENT_SONGSEL, 1, one_param_event, one_param_decode}, /* 0xf3 */
+ {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf4 */
+ {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf5 */
+ {SNDRV_SEQ_EVENT_TUNE_REQUEST, 0, NULL, NULL}, /* 0xf6 */
+ {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf7 */
+ {SNDRV_SEQ_EVENT_CLOCK, 0, NULL, NULL}, /* 0xf8 */
+ {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf9 */
+ {SNDRV_SEQ_EVENT_START, 0, NULL, NULL}, /* 0xfa */
+ {SNDRV_SEQ_EVENT_CONTINUE, 0, NULL, NULL}, /* 0xfb */
+ {SNDRV_SEQ_EVENT_STOP, 0, NULL, NULL}, /* 0xfc */
+ {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xfd */
+ {SNDRV_SEQ_EVENT_SENSING, 0, NULL, NULL}, /* 0xfe */
+ {SNDRV_SEQ_EVENT_RESET, 0, NULL, NULL}, /* 0xff */
};
static int extra_decode_ctrl14(struct snd_midi_event *dev, unsigned char *buf, int len,
}
dev->bufsize = bufsize;
dev->lastcmd = 0xff;
+ dev->type = ST_INVALID;
spin_lock_init(&dev->lock);
*rdev = dev;
return 0;
{
dev->read = 0;
dev->qlen = 0;
- dev->type = 0;
+ dev->type = ST_INVALID;
}
void snd_midi_event_reset_encode(struct snd_midi_event *dev)
ev->type = status_event[ST_SPECIAL + c - 0xf0].event;
ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
- return 1;
+ return ev->type != SNDRV_SEQ_EVENT_NONE;
}
spin_lock_irqsave(&dev->lock, flags);
- if (dev->qlen > 0) {
- /* rest of command */
- dev->buf[dev->read++] = c;
- if (dev->type != ST_SYSEX)
- dev->qlen--;
- } else {
+ if ((c & 0x80) &&
+ (c != MIDI_CMD_COMMON_SYSEX_END || dev->type != ST_SYSEX)) {
/* new command */
+ dev->buf[0] = c;
+ if ((c & 0xf0) == 0xf0) /* system messages */
+ dev->type = (c & 0x0f) + ST_SPECIAL;
+ else
+ dev->type = (c >> 4) & 0x07;
dev->read = 1;
- if (c & 0x80) {
- dev->buf[0] = c;
- if ((c & 0xf0) == 0xf0) /* special events */
- dev->type = (c & 0x0f) + ST_SPECIAL;
- else
- dev->type = (c >> 4) & 0x07;
- dev->qlen = status_event[dev->type].qlen;
- } else {
- /* process this byte as argument */
+ dev->qlen = status_event[dev->type].qlen;
+ } else {
+ if (dev->qlen > 0) {
+ /* rest of command */
dev->buf[dev->read++] = c;
+ if (dev->type != ST_SYSEX)
+ dev->qlen--;
+ } else {
+ /* running status */
+ dev->buf[1] = c;
dev->qlen = status_event[dev->type].qlen - 1;
+ dev->read = 2;
}
}
if (dev->qlen == 0) {
ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
if (status_event[dev->type].encode) /* set data values */
status_event[dev->type].encode(dev, ev);
+ if (dev->type >= ST_SPECIAL)
+ dev->type = ST_INVALID;
rc = 1;
} else if (dev->type == ST_SYSEX) {
if (c == MIDI_CMD_COMMON_SYSEX_END ||
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