mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-04 13:30:08 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Added switches API and rawmidi API...

Browse source
This commit is contained in:
Jaroslav Kysela 1998-08-27 20:47:51 +00:00
parent df8ab35aac
commit ef615c857f
13 changed files with 481 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

60
src/control/control.c
View file

@ -22,12 +22,13 @@
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "soundlib.h"
#define SND_FILE_CONTROL "/dev/sndcontrol%i"
#define SND_FILE_CONTROL "/dev/snd/control%i"
#define SND_CTL_VERSION_MAX SND_PROTOCOL_VERSION( 1, 0, 0 )
typedef struct {
@ -94,6 +95,63 @@ int snd_ctl_hw_info( void *handle, struct snd_ctl_hw_info *info )
return 0;
}
int snd_ctl_switches( void *handle )
{
snd_ctl_t *ctl;
int result;
ctl = (snd_ctl_t *)handle;
if ( !ctl ) return -EINVAL;
if ( ioctl( ctl -> fd, SND_CTL_IOCTL_SWITCHES, &result ) < 0 )
return -errno;
return result;
}
int snd_ctl_switch( void *handle, const char *switch_id )
{
snd_ctl_t *ctl;
struct snd_ctl_switch uswitch;
int idx, switches, err;
ctl = (snd_ctl_t *)handle;
if ( !ctl ) return -EINVAL;
/* bellow implementation isn't optimized for speed */
/* info about switches should be cached in the snd_mixer_t structure */
if ( (switches = snd_ctl_switches( handle )) < 0 )
return switches;
for ( idx = 0; idx < switches; idx++ ) {
if ( (err = snd_ctl_switch_read( handle, idx, &uswitch )) < 0 )
return err;
if ( !strncmp( switch_id, uswitch.name, sizeof( uswitch.name ) ) )
return idx;
}
return -EINVAL;
}
int snd_ctl_switch_read( void *handle, int switchn, struct snd_ctl_switch *data )
{
snd_ctl_t *ctl;
ctl = (snd_ctl_t *)handle;
if ( !ctl ) return -EINVAL;
data -> switchn = switchn;
if ( ioctl( ctl -> fd, SND_CTL_IOCTL_SWITCH_READ, data ) < 0 )
return -errno;
return 0;
}
int snd_ctl_switch_write( void *handle, int switchn, struct snd_ctl_switch *data )
{
snd_ctl_t *ctl;
ctl = (snd_ctl_t *)handle;
if ( !ctl ) return -EINVAL;
data -> switchn = switchn;
if ( ioctl( ctl -> fd, SND_CTL_IOCTL_SWITCH_WRITE, data ) < 0 )
return -errno;
return 0;
}
int snd_ctl_pcm_info( void *handle, int dev, snd_pcm_info_t *info )
{
snd_ctl_t *ctl;