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Diffstat (limited to 'sound/core/seq/seq_midi_event.c')
-rw-r--r--sound/core/seq/seq_midi_event.c141
1 files changed, 21 insertions, 120 deletions
diff --git a/sound/core/seq/seq_midi_event.c b/sound/core/seq/seq_midi_event.c
index 37db7ba492a6..fa9dfc53c3fc 100644
--- a/sound/core/seq/seq_midi_event.c
+++ b/sound/core/seq/seq_midi_event.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MIDI byte <-> sequencer event coder
*
* Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>,
* 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
- * 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 <linux/slab.h>
@@ -134,6 +121,7 @@ int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev)
*rdev = dev;
return 0;
}
+EXPORT_SYMBOL(snd_midi_event_new);
void snd_midi_event_free(struct snd_midi_event *dev)
{
@@ -142,6 +130,7 @@ void snd_midi_event_free(struct snd_midi_event *dev)
kfree(dev);
}
}
+EXPORT_SYMBOL(snd_midi_event_free);
/*
* initialize record
@@ -155,97 +144,33 @@ static inline void reset_encode(struct snd_midi_event *dev)
void snd_midi_event_reset_encode(struct snd_midi_event *dev)
{
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
+ guard(spinlock_irqsave)(&dev->lock);
reset_encode(dev);
- spin_unlock_irqrestore(&dev->lock, flags);
}
+EXPORT_SYMBOL(snd_midi_event_reset_encode);
void snd_midi_event_reset_decode(struct snd_midi_event *dev)
{
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
+ guard(spinlock_irqsave)(&dev->lock);
dev->lastcmd = 0xff;
- spin_unlock_irqrestore(&dev->lock, flags);
-}
-
-#if 0
-void snd_midi_event_init(struct snd_midi_event *dev)
-{
- snd_midi_event_reset_encode(dev);
- snd_midi_event_reset_decode(dev);
}
-#endif /* 0 */
+EXPORT_SYMBOL(snd_midi_event_reset_decode);
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(struct snd_midi_event *dev, int bufsize)
-{
- unsigned char *new_buf, *old_buf;
- unsigned long flags;
-
- if (bufsize == dev->bufsize)
- return 0;
- new_buf = kmalloc(bufsize, GFP_KERNEL);
- if (new_buf == NULL)
- return -ENOMEM;
- spin_lock_irqsave(&dev->lock, flags);
- old_buf = dev->buf;
- dev->buf = new_buf;
- dev->bufsize = bufsize;
- reset_encode(dev);
- spin_unlock_irqrestore(&dev->lock, flags);
- kfree(old_buf);
- return 0;
-}
-#endif /* 0 */
-
-/*
- * read bytes and encode to sequencer event if finished
- * return the size of encoded bytes
- */
-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;
-
- ev->type = SNDRV_SEQ_EVENT_NONE;
-
- while (count-- > 0) {
- rc = snd_midi_event_encode_byte(dev, *buf++, ev);
- result++;
- if (rc < 0)
- return rc;
- else if (rc > 0)
- return result;
- }
-
- return result;
-}
+EXPORT_SYMBOL(snd_midi_event_no_status);
/*
* read one byte and encode to sequencer event:
- * return 1 if MIDI bytes are encoded to an event
- * 0 data is not finished
- * negative for error
+ * return true if MIDI bytes are encoded to an event
+ * false data is not finished
*/
-int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
- struct snd_seq_event *ev)
+bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c,
+ struct snd_seq_event *ev)
{
- int rc = 0;
- unsigned long flags;
-
- c &= 0xff;
+ bool rc = false;
if (c >= MIDI_CMD_COMMON_CLOCK) {
/* real-time event */
@@ -255,7 +180,7 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
return ev->type != SNDRV_SEQ_EVENT_NONE;
}
- spin_lock_irqsave(&dev->lock, flags);
+ guard(spinlock_irqsave)(&dev->lock);
if ((c & 0x80) &&
(c != MIDI_CMD_COMMON_SYSEX_END || dev->type != ST_SYSEX)) {
/* new command */
@@ -287,7 +212,7 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
status_event[dev->type].encode(dev, ev);
if (dev->type >= ST_SPECIAL)
dev->type = ST_INVALID;
- rc = 1;
+ rc = true;
} else if (dev->type == ST_SYSEX) {
if (c == MIDI_CMD_COMMON_SYSEX_END ||
dev->read >= dev->bufsize) {
@@ -300,13 +225,13 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
dev->read = 0; /* continue to parse */
else
reset_encode(dev); /* all parsed */
- rc = 1;
+ rc = true;
}
}
- spin_unlock_irqrestore(&dev->lock, flags);
return rc;
}
+EXPORT_SYMBOL(snd_midi_event_encode_byte);
/* encode note event */
static void note_event(struct snd_midi_event *dev, struct snd_seq_event *ev)
@@ -408,6 +333,7 @@ long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long
return qlen;
}
}
+EXPORT_SYMBOL(snd_midi_event_decode);
/* decode note event */
@@ -488,12 +414,12 @@ 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;
- static char cbytes_nrpn[4] = { MIDI_CTL_NONREG_PARM_NUM_MSB,
+ const char *cbytes;
+ static const char cbytes_nrpn[4] = { MIDI_CTL_NONREG_PARM_NUM_MSB,
MIDI_CTL_NONREG_PARM_NUM_LSB,
MIDI_CTL_MSB_DATA_ENTRY,
MIDI_CTL_LSB_DATA_ENTRY };
- static char cbytes_rpn[4] = { MIDI_CTL_REGIST_PARM_NUM_MSB,
+ static const char cbytes_rpn[4] = { MIDI_CTL_REGIST_PARM_NUM_MSB,
MIDI_CTL_REGIST_PARM_NUM_LSB,
MIDI_CTL_MSB_DATA_ENTRY,
MIDI_CTL_LSB_DATA_ENTRY };
@@ -523,28 +449,3 @@ static int extra_decode_xrpn(struct snd_midi_event *dev, unsigned char *buf,
}
return idx;
}
-
-/*
- * exports
- */
-
-EXPORT_SYMBOL(snd_midi_event_new);
-EXPORT_SYMBOL(snd_midi_event_free);
-EXPORT_SYMBOL(snd_midi_event_reset_encode);
-EXPORT_SYMBOL(snd_midi_event_reset_decode);
-EXPORT_SYMBOL(snd_midi_event_no_status);
-EXPORT_SYMBOL(snd_midi_event_encode);
-EXPORT_SYMBOL(snd_midi_event_encode_byte);
-EXPORT_SYMBOL(snd_midi_event_decode);
-
-static int __init alsa_seq_midi_event_init(void)
-{
- return 0;
-}
-
-static void __exit alsa_seq_midi_event_exit(void)
-{
-}
-
-module_init(alsa_seq_midi_event_init)
-module_exit(alsa_seq_midi_event_exit)
generated by cgit (git 2.34.1) at 2025-12-25 11:23:10 +0000