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Diffstat (limited to 'sound/core/seq/seq_midi_emul.c')
-rw-r--r--sound/core/seq/seq_midi_emul.c91
1 files changed, 37 insertions, 54 deletions
diff --git a/sound/core/seq/seq_midi_emul.c b/sound/core/seq/seq_midi_emul.c
index 6f64471ddde3..81d2ef5e5811 100644
--- a/sound/core/seq/seq_midi_emul.c
+++ b/sound/core/seq/seq_midi_emul.c
@@ -1,24 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* GM/GS/XG midi module.
*
* Copyright (C) 1999 Steve Ratcliffe
*
* Based on awe_wave.c by Takashi Iwai
- *
- * 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
- *
*/
/*
* This module is used to keep track of the current midi state.
@@ -44,22 +30,25 @@ MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI emulation."
MODULE_LICENSE("GPL");
/* Prototypes for static functions */
-static void note_off(struct snd_midi_op *ops, void *drv,
+static void note_off(const struct snd_midi_op *ops, void *drv,
struct snd_midi_channel *chan,
int note, int vel);
-static void do_control(struct snd_midi_op *ops, void *private,
+static void do_control(const struct snd_midi_op *ops, void *private,
struct snd_midi_channel_set *chset,
struct snd_midi_channel *chan,
int control, int value);
-static void rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
+static void rpn(const struct snd_midi_op *ops, void *drv,
+ struct snd_midi_channel *chan,
struct snd_midi_channel_set *chset);
-static void nrpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
+static void nrpn(const struct snd_midi_op *ops, void *drv,
+ struct snd_midi_channel *chan,
struct snd_midi_channel_set *chset);
-static void sysex(struct snd_midi_op *ops, void *private, unsigned char *sysex,
+static void sysex(const struct snd_midi_op *ops, void *private,
+ unsigned char *sysex,
int len, struct snd_midi_channel_set *chset);
-static void all_sounds_off(struct snd_midi_op *ops, void *private,
+static void all_sounds_off(const struct snd_midi_op *ops, void *private,
struct snd_midi_channel *chan);
-static void all_notes_off(struct snd_midi_op *ops, void *private,
+static void all_notes_off(const struct snd_midi_op *ops, void *private,
struct snd_midi_channel *chan);
static void snd_midi_reset_controllers(struct snd_midi_channel *chan);
static void reset_all_channels(struct snd_midi_channel_set *chset);
@@ -80,7 +69,7 @@ static void reset_all_channels(struct snd_midi_channel_set *chset);
* be interpreted.
*/
void
-snd_midi_process_event(struct snd_midi_op *ops,
+snd_midi_process_event(const struct snd_midi_op *ops,
struct snd_seq_event *ev,
struct snd_midi_channel_set *chanset)
{
@@ -89,7 +78,7 @@ snd_midi_process_event(struct snd_midi_op *ops,
int dest_channel = 0;
if (ev == NULL || chanset == NULL) {
- snd_printd("ev or chanbase NULL (snd_midi_process_event)\n");
+ pr_debug("ALSA: seq_midi_emul: ev or chanbase NULL (snd_midi_process_event)\n");
return;
}
if (chanset->channels == NULL)
@@ -98,7 +87,7 @@ snd_midi_process_event(struct snd_midi_op *ops,
if (snd_seq_ev_is_channel_type(ev)) {
dest_channel = ev->data.note.channel;
if (dest_channel >= chanset->max_channels) {
- snd_printd("dest channel is %d, max is %d\n",
+ pr_debug("ALSA: seq_midi_emul: dest channel is %d, max is %d\n",
dest_channel, chanset->max_channels);
return;
}
@@ -232,17 +221,19 @@ snd_midi_process_event(struct snd_midi_op *ops,
case SNDRV_SEQ_EVENT_ECHO:
not_yet:
default:
- /*snd_printd("Unimplemented event %d\n", ev->type);*/
+ /*pr_debug("ALSA: seq_midi_emul: Unimplemented event %d\n", ev->type);*/
break;
}
}
+EXPORT_SYMBOL(snd_midi_process_event);
/*
* release note
*/
static void
-note_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
+note_off(const struct snd_midi_op *ops, void *drv,
+ struct snd_midi_channel *chan,
int note, int vel)
{
if (chan->gm_hold) {
@@ -264,11 +255,15 @@ note_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
* events that need to take place immediately to the driver.
*/
static void
-do_control(struct snd_midi_op *ops, void *drv, struct snd_midi_channel_set *chset,
+do_control(const struct snd_midi_op *ops, void *drv,
+ struct snd_midi_channel_set *chset,
struct snd_midi_channel *chan, int control, int value)
{
int i;
+ if (control >= ARRAY_SIZE(chan->control))
+ return;
+
/* Switches */
if ((control >=64 && control <=69) || (control >= 80 && control <= 83)) {
/* These are all switches; either off or on so set to 0 or 127 */
@@ -314,7 +309,7 @@ do_control(struct snd_midi_op *ops, void *drv, struct snd_midi_channel_set *chse
break;
case MIDI_CTL_MSB_DATA_ENTRY:
chan->control[MIDI_CTL_LSB_DATA_ENTRY] = 0;
- /* go through here */
+ fallthrough;
case MIDI_CTL_LSB_DATA_ENTRY:
if (chan->param_type == SNDRV_MIDI_PARAM_TYPE_REGISTERED)
rpn(ops, drv, chan, chset);
@@ -406,12 +401,13 @@ snd_midi_channel_set_clear(struct snd_midi_channel_set *chset)
chan->drum_channel = 0;
}
}
+EXPORT_SYMBOL(snd_midi_channel_set_clear);
/*
* Process a rpn message.
*/
static void
-rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
+rpn(const struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
struct snd_midi_channel_set *chset)
{
int type;
@@ -451,7 +447,7 @@ rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
* Process an nrpn message.
*/
static void
-nrpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
+nrpn(const struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
struct snd_midi_channel_set *chset)
{
/* parse XG NRPNs here if possible */
@@ -479,15 +475,15 @@ get_channel(unsigned char cmd)
* Process a sysex message.
*/
static void
-sysex(struct snd_midi_op *ops, void *private, unsigned char *buf, int len,
+sysex(const struct snd_midi_op *ops, void *private, unsigned char *buf, int len,
struct snd_midi_channel_set *chset)
{
/* GM on */
- static unsigned char gm_on_macro[] = {
+ static const unsigned char gm_on_macro[] = {
0x7e,0x7f,0x09,0x01,
};
/* XG on */
- static unsigned char xg_on_macro[] = {
+ static const unsigned char xg_on_macro[] = {
0x43,0x10,0x4c,0x00,0x00,0x7e,0x00,
};
/* GS prefix
@@ -496,7 +492,7 @@ sysex(struct snd_midi_op *ops, void *private, unsigned char *buf, int len,
* chorus mode: XX=0x01, YY=0x38, ZZ=0-7
* master vol: XX=0x00, YY=0x04, ZZ=0-127
*/
- static unsigned char gs_pfx_macro[] = {
+ static const unsigned char gs_pfx_macro[] = {
0x41,0x10,0x42,0x12,0x40,/*XX,YY,ZZ*/
};
@@ -593,7 +589,8 @@ sysex(struct snd_midi_op *ops, void *private, unsigned char *buf, int len,
* all sound off
*/
static void
-all_sounds_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan)
+all_sounds_off(const struct snd_midi_op *ops, void *drv,
+ struct snd_midi_channel *chan)
{
int n;
@@ -611,7 +608,8 @@ all_sounds_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan
* all notes off
*/
static void
-all_notes_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan)
+all_notes_off(const struct snd_midi_op *ops, void *drv,
+ struct snd_midi_channel *chan)
{
int n;
@@ -652,7 +650,7 @@ static struct snd_midi_channel *snd_midi_channel_init_set(int n)
struct snd_midi_channel *chan;
int i;
- chan = kmalloc(n * sizeof(struct snd_midi_channel), GFP_KERNEL);
+ chan = kmalloc_array(n, sizeof(struct snd_midi_channel), GFP_KERNEL);
if (chan) {
for (i = 0; i < n; i++)
snd_midi_channel_init(chan+i, i);
@@ -698,6 +696,7 @@ struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n)
}
return chset;
}
+EXPORT_SYMBOL(snd_midi_channel_alloc_set);
/*
* Reset the midi controllers on a particular channel to default values.
@@ -721,20 +720,4 @@ void snd_midi_channel_free_set(struct snd_midi_channel_set *chset)
kfree(chset->channels);
kfree(chset);
}
-
-static int __init alsa_seq_midi_emul_init(void)
-{
- return 0;
-}
-
-static void __exit alsa_seq_midi_emul_exit(void)
-{
-}
-
-module_init(alsa_seq_midi_emul_init)
-module_exit(alsa_seq_midi_emul_exit)
-
-EXPORT_SYMBOL(snd_midi_process_event);
-EXPORT_SYMBOL(snd_midi_channel_set_clear);
-EXPORT_SYMBOL(snd_midi_channel_alloc_set);
EXPORT_SYMBOL(snd_midi_channel_free_set);
generated by cgit (git 2.34.1) at 2025-12-25 11:40:41 +0000