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Added switches API and rawmidi API...

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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
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76
src/pcm/pcm.c
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@ -1,17 +1,34 @@
/*
* PCM Interface - main file
* Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#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_PCM "/dev/sndpcm%i%i"
#define SND_FILE_PCM "/dev/snd/pcm%i%i"
#define SND_PCM_VERSION_MAX SND_PROTOCOL_VERSION( 1, 0, 0 )
typedef struct {
@ -120,6 +137,63 @@ int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info )
return 0;
}
int snd_pcm_switches( void *handle )
{
snd_pcm_t *pcm;
int result;
pcm = (snd_pcm_t *)handle;
if ( !pcm ) return -EINVAL;
if ( ioctl( pcm -> fd, SND_PCM_IOCTL_SWITCHES, &result ) < 0 )
return -errno;
return result;
}
int snd_pcm_switch( void *handle, const char *switch_id )
{
snd_pcm_t *pcm;
snd_pcm_switch_t uswitch;
int idx, switches, err;
pcm = (snd_pcm_t *)handle;
if ( !pcm ) return -EINVAL;
/* bellow implementation isn't optimized for speed */
/* info about switches should be cached in the snd_mixer_t structure */
if ( (switches = snd_mixer_switches( handle )) < 0 )
return switches;
for ( idx = 0; idx < switches; idx++ ) {
if ( (err = snd_pcm_switch_read( handle, idx, &uswitch )) < 0 )
return err;
if ( !strncmp( switch_id, uswitch.name, sizeof( uswitch.name ) ) )
return idx;
}
return -EINVAL;
}
int snd_pcm_switch_read( void *handle, int switchn, snd_pcm_switch_t *data )
{
snd_pcm_t *pcm;
pcm = (snd_pcm_t *)handle;
if ( !pcm ) return -EINVAL;
data -> switchn = switchn;
if ( ioctl( pcm -> fd, SND_PCM_IOCTL_SWITCH_READ, data ) < 0 )
return -errno;
return 0;
}
int snd_pcm_switch_write( void *handle, int switchn, snd_pcm_switch_t *data )
{
snd_pcm_t *pcm;
pcm = (snd_pcm_t *)handle;
if ( !pcm ) return -EINVAL;
data -> switchn = switchn;
if ( ioctl( pcm -> fd, SND_PCM_IOCTL_SWITCH_WRITE, data ) < 0 )
return -errno;
return 0;
}
int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format )
{
snd_pcm_t *pcm;