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Merge pull request #52 from rfvirgil/get_id

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mixer: Add mixer_ctl_get_id
This commit is contained in:
Simon Wilson
2015-09-15 11:27:32 -07:00
parent 1c30d6eb6a 57a877495e
commit 53e232c3ef
2 changed files with 13 additions and 0 deletions
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include/tinyalsa/asoundlib.h
+1
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@@ -225,6 +225,7 @@ struct mixer_ctl *mixer_get_ctl(struct mixer *mixer, unsigned int id);
struct mixer_ctl *mixer_get_ctl_by_name(struct mixer *mixer, const char *name);
/* Get info about mixer controls */
unsigned int mixer_ctl_get_id(struct mixer_ctl *ctl);
const char *mixer_ctl_get_name(struct mixer_ctl *ctl);
enum mixer_ctl_type mixer_ctl_get_type(struct mixer_ctl *ctl);
const char *mixer_ctl_get_type_string(struct mixer_ctl *ctl);
mixer.c
+12
View File
@@ -33,6 +33,7 @@
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <limits.h>
#include <sys/ioctl.h>
@@ -209,6 +210,17 @@ void mixer_ctl_update(struct mixer_ctl *ctl)
ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_INFO, ctl->info);
}
unsigned int mixer_ctl_get_id(struct mixer_ctl *ctl)
{
if (!ctl)
return UINT_MAX;
/* numid values start at 1, return a 0-base value that
* can be passed to mixer_get_ctl()
*/
return ctl->info->id.numid - 1;
}
const char *mixer_ctl_get_name(struct mixer_ctl *ctl)
{
if (!ctl)