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/**
* \file include/mixer_abst.h
* \brief Mixer abstract implementation interface library for the ALSA library
* \author Jaroslav Kysela <perex@perex.cz>
* \date 2005
*
* Mixer abstact implementation interface library for the ALSA library
*/
/*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __ALSA_MIXER_ABST_H
#define __ALSA_MIXER_ABST_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* \defgroup Mixer_Abstract Mixer Abstact Module Interface
* The mixer abstact module interface.
* \{
*/
#define SM_PLAY 0
#define SM_CAPT 1
#define SM_CAP_GVOLUME (1<<1)
#define SM_CAP_GSWITCH (1<<2)
#define SM_CAP_PVOLUME (1<<3)
#define SM_CAP_PVOLUME_JOIN (1<<4)
#define SM_CAP_PSWITCH (1<<5)
#define SM_CAP_PSWITCH_JOIN (1<<6)
#define SM_CAP_CVOLUME (1<<7)
#define SM_CAP_CVOLUME_JOIN (1<<8)
#define SM_CAP_CSWITCH (1<<9)
#define SM_CAP_CSWITCH_JOIN (1<<10)
#define SM_CAP_CSWITCH_EXCL (1<<11)
#define SM_CAP_PENUM (1<<12)
#define SM_CAP_CENUM (1<<13)
/* SM_CAP_* 24-31 => private for module use */
#define SM_OPS_IS_ACTIVE 0
#define SM_OPS_IS_MONO 1
#define SM_OPS_IS_CHANNEL 2
#define SM_OPS_IS_ENUMERATED 3
#define SM_OPS_IS_ENUMCNT 4
#define sm_selem(x) ((sm_selem_t *)((x)->private_data))
#define sm_selem_ops(x) ((sm_selem_t *)((x)->private_data))->ops
typedef struct _sm_selem {
snd_mixer_selem_id_t *id;
struct sm_elem_ops *ops;
unsigned int caps;
unsigned int capture_group;
} sm_selem_t;
typedef struct _sm_class_basic {
char *device;
snd_ctl_t *ctl;
snd_hctl_t *hctl;
snd_ctl_card_info_t *info;
} sm_class_basic_t;
struct sm_elem_ops {
int (*is)(snd_mixer_elem_t *elem, int dir, int cmd, int val);
int (*get_range)(snd_mixer_elem_t *elem, int dir, long *min, long *max);
int (*set_range)(snd_mixer_elem_t *elem, int dir, long min, long max);
int (*get_dB_range)(snd_mixer_elem_t *elem, int dir, long *min, long *max);
int (*ask_vol_dB)(snd_mixer_elem_t *elem, int dir, long value, long *dbValue);
int (*ask_dB_vol)(snd_mixer_elem_t *elem, int dir, long dbValue, long *value, int xdir);
int (*get_volume)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long *value);
int (*get_dB)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long *value);
int (*set_volume)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long value);
int (*set_dB)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long value, int xdir);
int (*get_switch)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, int *value);
int (*set_switch)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, int value);
int (*enum_item_name)(snd_mixer_elem_t *elem, unsigned int item, size_t maxlen, char *buf);
int (*get_enum_item)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int *itemp);
int (*set_enum_item)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int item);
};
int snd_mixer_selem_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2);
int snd_mixer_sbasic_info(const snd_mixer_class_t *class, sm_class_basic_t *info);
void *snd_mixer_sbasic_get_private(const snd_mixer_class_t *class);
void snd_mixer_sbasic_set_private(const snd_mixer_class_t *class, void *private_data);
void snd_mixer_sbasic_set_private_free(const snd_mixer_class_t *class, void (*private_free)(snd_mixer_class_t *class));
/** \} */
#ifdef __cplusplus
}
#endif
#endif /* __ALSA_MIXER_ABST_H */
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