1/**
2 * \file include/mixer_abst.h
3 * \brief Mixer abstract implementation interface library for the ALSA library
4 * \author Jaroslav Kysela <perex@perex.cz>
5 * \date 2005
6 *
7 * Mixer abstact implementation interface library for the ALSA library
8 */
9/*
10 *   This library is free software; you can redistribute it and/or modify
11 *   it under the terms of the GNU Lesser General Public License as
12 *   published by the Free Software Foundation; either version 2.1 of
13 *   the License, or (at your option) any later version.
14 *
15 *   This program is distributed in the hope that it will be useful,
16 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
17 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 *   GNU Lesser General Public License for more details.
19 *
20 *   You should have received a copy of the GNU Lesser General Public
21 *   License along with this library; if not, write to the Free Software
22 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23 *
24 */
25
26#ifndef __ALSA_MIXER_ABST_H
27#define __ALSA_MIXER_ABST_H
28
29#ifdef __cplusplus
30extern "C" {
31#endif
32
33/**
34 *  \defgroup Mixer_Abstract Mixer Abstact Module Interface
35 *  The mixer abstact module interface.
36 *  \{
37 */
38
39#define	SM_PLAY			0
40#define SM_CAPT			1
41
42#define SM_CAP_GVOLUME		(1<<1)
43#define SM_CAP_GSWITCH		(1<<2)
44#define SM_CAP_PVOLUME		(1<<3)
45#define SM_CAP_PVOLUME_JOIN	(1<<4)
46#define SM_CAP_PSWITCH		(1<<5)
47#define SM_CAP_PSWITCH_JOIN	(1<<6)
48#define SM_CAP_CVOLUME		(1<<7)
49#define SM_CAP_CVOLUME_JOIN	(1<<8)
50#define SM_CAP_CSWITCH		(1<<9)
51#define SM_CAP_CSWITCH_JOIN	(1<<10)
52#define SM_CAP_CSWITCH_EXCL	(1<<11)
53#define SM_CAP_PENUM		(1<<12)
54#define SM_CAP_CENUM		(1<<13)
55/* SM_CAP_* 24-31 => private for module use */
56
57#define SM_OPS_IS_ACTIVE	0
58#define SM_OPS_IS_MONO		1
59#define SM_OPS_IS_CHANNEL	2
60#define SM_OPS_IS_ENUMERATED	3
61#define SM_OPS_IS_ENUMCNT	4
62
63#define sm_selem(x)		((sm_selem_t *)((x)->private_data))
64#define sm_selem_ops(x)		((sm_selem_t *)((x)->private_data))->ops
65
66typedef struct _sm_selem {
67	snd_mixer_selem_id_t *id;
68	struct sm_elem_ops *ops;
69	unsigned int caps;
70	unsigned int capture_group;
71} sm_selem_t;
72
73typedef struct _sm_class_basic {
74	char *device;
75	snd_ctl_t *ctl;
76	snd_hctl_t *hctl;
77	snd_ctl_card_info_t *info;
78} sm_class_basic_t;
79
80struct sm_elem_ops {
81	int (*is)(snd_mixer_elem_t *elem, int dir, int cmd, int val);
82	int (*get_range)(snd_mixer_elem_t *elem, int dir, long *min, long *max);
83	int (*set_range)(snd_mixer_elem_t *elem, int dir, long min, long max);
84	int (*get_dB_range)(snd_mixer_elem_t *elem, int dir, long *min, long *max);
85	int (*get_volume)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long *value);
86	int (*get_dB)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long *value);
87	int (*set_volume)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long value);
88	int (*set_dB)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long value, int xdir);
89	int (*get_switch)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, int *value);
90	int (*set_switch)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, int value);
91	int (*enum_item_name)(snd_mixer_elem_t *elem, unsigned int item, size_t maxlen, char *buf);
92	int (*get_enum_item)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int *itemp);
93	int (*set_enum_item)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int item);
94};
95
96int snd_mixer_selem_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2);
97
98int snd_mixer_sbasic_info(const snd_mixer_class_t *class, sm_class_basic_t *info);
99void *snd_mixer_sbasic_get_private(const snd_mixer_class_t *class);
100void snd_mixer_sbasic_set_private(const snd_mixer_class_t *class, void *private_data);
101void snd_mixer_sbasic_set_private_free(const snd_mixer_class_t *class, void (*private_free)(snd_mixer_class_t *class));
102
103/** \} */
104
105#ifdef __cplusplus
106}
107#endif
108
109#endif /* __ALSA_MIXER_ABST_H */
110
111