* 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <sound/driver.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/string.h>
#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 */
-/* status event types */
-typedef void (*event_encode_t)(snd_midi_event_t *dev, snd_seq_event_t *ev);
-typedef void (*event_decode_t)(snd_seq_event_t *ev, unsigned char *buf);
-
/*
* prototypes
*/
-static void note_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
-static void one_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
-static void pitchbend_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
-static void two_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
-static void one_param_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
-static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
-static void note_decode(snd_seq_event_t *ev, unsigned char *buf);
-static void one_param_decode(snd_seq_event_t *ev, unsigned char *buf);
-static void pitchbend_decode(snd_seq_event_t *ev, unsigned char *buf);
-static void two_param_decode(snd_seq_event_t *ev, unsigned char *buf);
-static void songpos_decode(snd_seq_event_t *ev, unsigned char *buf);
+static void note_event(struct snd_midi_event *dev, struct snd_seq_event *ev);
+static void one_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev);
+static void pitchbend_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev);
+static void two_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev);
+static void one_param_event(struct snd_midi_event *dev, struct snd_seq_event *ev);
+static void songpos_event(struct snd_midi_event *dev, struct snd_seq_event *ev);
+static void note_decode(struct snd_seq_event *ev, unsigned char *buf);
+static void one_param_decode(struct snd_seq_event *ev, unsigned char *buf);
+static void pitchbend_decode(struct snd_seq_event *ev, unsigned char *buf);
+static void two_param_decode(struct snd_seq_event *ev, unsigned char *buf);
+static void songpos_decode(struct snd_seq_event *ev, unsigned char *buf);
/*
* event list
*/
-static struct status_event_list_t {
+static struct status_event_list {
int event;
int qlen;
- event_encode_t encode;
- event_decode_t decode;
+ 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(snd_midi_event_t *dev, unsigned char *buf, int len, snd_seq_event_t *ev);
-static int extra_decode_xrpn(snd_midi_event_t *dev, unsigned char *buf, int count, snd_seq_event_t *ev);
+static int extra_decode_ctrl14(struct snd_midi_event *dev, unsigned char *buf, int len,
+ struct snd_seq_event *ev);
+static int extra_decode_xrpn(struct snd_midi_event *dev, unsigned char *buf, int count,
+ struct snd_seq_event *ev);
-static struct extra_event_list_t {
+static struct extra_event_list {
int event;
- int (*decode)(snd_midi_event_t *dev, unsigned char *buf, int len, snd_seq_event_t *ev);
+ int (*decode)(struct snd_midi_event *dev, unsigned char *buf, int len,
+ struct snd_seq_event *ev);
} extra_event[] = {
{SNDRV_SEQ_EVENT_CONTROL14, extra_decode_ctrl14},
{SNDRV_SEQ_EVENT_NONREGPARAM, extra_decode_xrpn},
* new/delete record
*/
-int snd_midi_event_new(int bufsize, snd_midi_event_t **rdev)
+int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev)
{
- snd_midi_event_t *dev;
+ struct snd_midi_event *dev;
*rdev = NULL;
- dev = kcalloc(1, sizeof(*dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL)
return -ENOMEM;
if (bufsize > 0) {
}
dev->bufsize = bufsize;
dev->lastcmd = 0xff;
+ dev->type = ST_INVALID;
spin_lock_init(&dev->lock);
*rdev = dev;
return 0;
}
-void snd_midi_event_free(snd_midi_event_t *dev)
+void snd_midi_event_free(struct snd_midi_event *dev)
{
if (dev != NULL) {
kfree(dev->buf);
/*
* initialize record
*/
-static inline void reset_encode(snd_midi_event_t *dev)
+static inline void reset_encode(struct snd_midi_event *dev)
{
dev->read = 0;
dev->qlen = 0;
- dev->type = 0;
+ dev->type = ST_INVALID;
}
-void snd_midi_event_reset_encode(snd_midi_event_t *dev)
+void snd_midi_event_reset_encode(struct snd_midi_event *dev)
{
unsigned long flags;
spin_unlock_irqrestore(&dev->lock, flags);
}
-void snd_midi_event_reset_decode(snd_midi_event_t *dev)
+void snd_midi_event_reset_decode(struct snd_midi_event *dev)
{
unsigned long flags;
}
#if 0
-void snd_midi_event_init(snd_midi_event_t *dev)
+void snd_midi_event_init(struct snd_midi_event *dev)
{
snd_midi_event_reset_encode(dev);
snd_midi_event_reset_decode(dev);
}
#endif /* 0 */
-void snd_midi_event_no_status(snd_midi_event_t *dev, int on)
+void snd_midi_event_no_status(struct snd_midi_event *dev, int on)
{
dev->nostat = on ? 1 : 0;
}
* resize buffer
*/
#if 0
-int snd_midi_event_resize_buffer(snd_midi_event_t *dev, int bufsize)
+int snd_midi_event_resize_buffer(struct snd_midi_event *dev, int bufsize)
{
unsigned char *new_buf, *old_buf;
unsigned long flags;
* read bytes and encode to sequencer event if finished
* return the size of encoded bytes
*/
-long snd_midi_event_encode(snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev)
+long snd_midi_event_encode(struct snd_midi_event *dev, unsigned char *buf, long count,
+ struct snd_seq_event *ev)
{
long result = 0;
int rc;
* 0 data is not finished
* negative for error
*/
-int snd_midi_event_encode_byte(snd_midi_event_t *dev, int c, snd_seq_event_t *ev)
+int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
+ struct snd_seq_event *ev)
{
int rc = 0;
unsigned long flags;
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 ||
}
/* encode note event */
-static void note_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
+static void note_event(struct snd_midi_event *dev, struct snd_seq_event *ev)
{
ev->data.note.channel = dev->buf[0] & 0x0f;
ev->data.note.note = dev->buf[1];
}
/* encode one parameter controls */
-static void one_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
+static void one_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev)
{
ev->data.control.channel = dev->buf[0] & 0x0f;
ev->data.control.value = dev->buf[1];
}
/* encode pitch wheel change */
-static void pitchbend_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
+static void pitchbend_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev)
{
ev->data.control.channel = dev->buf[0] & 0x0f;
ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1] - 8192;
}
/* encode midi control change */
-static void two_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
+static void two_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev)
{
ev->data.control.channel = dev->buf[0] & 0x0f;
ev->data.control.param = dev->buf[1];
}
/* encode one parameter value*/
-static void one_param_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
+static void one_param_event(struct snd_midi_event *dev, struct snd_seq_event *ev)
{
ev->data.control.value = dev->buf[1];
}
/* encode song position */
-static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
+static void songpos_event(struct snd_midi_event *dev, struct snd_seq_event *ev)
{
ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1];
}
* decode from a sequencer event to midi bytes
* return the size of decoded midi events
*/
-long snd_midi_event_decode(snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev)
+long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count,
+ struct snd_seq_event *ev)
{
unsigned int cmd, type;
/* decode note event */
-static void note_decode(snd_seq_event_t *ev, unsigned char *buf)
+static void note_decode(struct snd_seq_event *ev, unsigned char *buf)
{
buf[0] = ev->data.note.note & 0x7f;
buf[1] = ev->data.note.velocity & 0x7f;
}
/* decode one parameter controls */
-static void one_param_decode(snd_seq_event_t *ev, unsigned char *buf)
+static void one_param_decode(struct snd_seq_event *ev, unsigned char *buf)
{
buf[0] = ev->data.control.value & 0x7f;
}
/* decode pitch wheel change */
-static void pitchbend_decode(snd_seq_event_t *ev, unsigned char *buf)
+static void pitchbend_decode(struct snd_seq_event *ev, unsigned char *buf)
{
int value = ev->data.control.value + 8192;
buf[0] = value & 0x7f;
}
/* decode midi control change */
-static void two_param_decode(snd_seq_event_t *ev, unsigned char *buf)
+static void two_param_decode(struct snd_seq_event *ev, unsigned char *buf)
{
buf[0] = ev->data.control.param & 0x7f;
buf[1] = ev->data.control.value & 0x7f;
}
/* decode song position */
-static void songpos_decode(snd_seq_event_t *ev, unsigned char *buf)
+static void songpos_decode(struct snd_seq_event *ev, unsigned char *buf)
{
buf[0] = ev->data.control.value & 0x7f;
buf[1] = (ev->data.control.value >> 7) & 0x7f;
}
/* decode 14bit control */
-static int extra_decode_ctrl14(snd_midi_event_t *dev, unsigned char *buf, int count, snd_seq_event_t *ev)
+static int extra_decode_ctrl14(struct snd_midi_event *dev, unsigned char *buf,
+ int count, struct snd_seq_event *ev)
{
unsigned char cmd;
int idx = 0;
}
/* decode reg/nonreg param */
-static int extra_decode_xrpn(snd_midi_event_t *dev, unsigned char *buf, int count, snd_seq_event_t *ev)
+static int extra_decode_xrpn(struct snd_midi_event *dev, unsigned char *buf,
+ int count, struct snd_seq_event *ev)
{
unsigned char cmd;
char *cbytes;
if (dev->nostat && count < 12)
return -ENOMEM;
cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f);
- bytes[0] = ev->data.control.param & 0x007f;
- bytes[1] = (ev->data.control.param & 0x3f80) >> 7;
- bytes[2] = ev->data.control.value & 0x007f;
- bytes[3] = (ev->data.control.value & 0x3f80) >> 7;
+ bytes[0] = (ev->data.control.param & 0x3f80) >> 7;
+ bytes[1] = ev->data.control.param & 0x007f;
+ bytes[2] = (ev->data.control.value & 0x3f80) >> 7;
+ bytes[3] = ev->data.control.value & 0x007f;
if (cmd != dev->lastcmd && !dev->nostat) {
if (count < 9)
return -ENOMEM;
git.openpandora.org / pandora-kernel.git / blobdiff