1/*
2 *  Control Interface - local header file
3 *  Copyright (c) 2000 by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 *   This library is free software; you can redistribute it and/or modify
7 *   it under the terms of the GNU Lesser General Public License as
8 *   published by the Free Software Foundation; either version 2.1 of
9 *   the License, or (at your option) any later version.
10 *
11 *   This program is distributed in the hope that it will be useful,
12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *   GNU Lesser General Public License for more details.
15 *
16 *   You should have received a copy of the GNU Lesser General Public
17 *   License along with this library; if not, write to the Free Software
18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19 *
20 */
21
22#include "local.h"
23
24typedef struct _snd_ctl_ops {
25	int (*close)(snd_ctl_t *handle);
26	int (*nonblock)(snd_ctl_t *handle, int nonblock);
27	int (*async)(snd_ctl_t *handle, int sig, pid_t pid);
28	int (*subscribe_events)(snd_ctl_t *handle, int subscribe);
29	int (*card_info)(snd_ctl_t *handle, snd_ctl_card_info_t *info);
30	int (*element_list)(snd_ctl_t *handle, snd_ctl_elem_list_t *list);
31	int (*element_info)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
32	int (*element_add)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
33	int (*element_replace)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
34	int (*element_remove)(snd_ctl_t *handle, snd_ctl_elem_id_t *id);
35	int (*element_read)(snd_ctl_t *handle, snd_ctl_elem_value_t *control);
36	int (*element_write)(snd_ctl_t *handle, snd_ctl_elem_value_t *control);
37	int (*element_lock)(snd_ctl_t *handle, snd_ctl_elem_id_t *lock);
38	int (*element_unlock)(snd_ctl_t *handle, snd_ctl_elem_id_t *unlock);
39	int (*element_tlv)(snd_ctl_t *handle, int op_flag, unsigned int numid,
40			   unsigned int *tlv, unsigned int tlv_size);
41	int (*hwdep_next_device)(snd_ctl_t *handle, int *device);
42	int (*hwdep_info)(snd_ctl_t *handle, snd_hwdep_info_t * info);
43	int (*pcm_next_device)(snd_ctl_t *handle, int *device);
44	int (*pcm_info)(snd_ctl_t *handle, snd_pcm_info_t * info);
45	int (*pcm_prefer_subdevice)(snd_ctl_t *handle, int subdev);
46	int (*rawmidi_next_device)(snd_ctl_t *handle, int *device);
47	int (*rawmidi_info)(snd_ctl_t *handle, snd_rawmidi_info_t * info);
48	int (*rawmidi_prefer_subdevice)(snd_ctl_t *handle, int subdev);
49	int (*set_power_state)(snd_ctl_t *handle, unsigned int state);
50	int (*get_power_state)(snd_ctl_t *handle, unsigned int *state);
51	int (*read)(snd_ctl_t *handle, snd_ctl_event_t *event);
52	int (*poll_descriptors_count)(snd_ctl_t *handle);
53	int (*poll_descriptors)(snd_ctl_t *handle, struct pollfd *pfds, unsigned int space);
54	int (*poll_revents)(snd_ctl_t *handle, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
55} snd_ctl_ops_t;
56
57
58struct _snd_ctl {
59	void *open_func;
60	char *name;
61	snd_ctl_type_t type;
62	const snd_ctl_ops_t *ops;
63	void *private_data;
64	int nonblock;
65	int poll_fd;
66	struct list_head async_handlers;
67};
68
69struct _snd_hctl_elem {
70	snd_ctl_elem_id_t id; 		/* must be always on top */
71	struct list_head list;		/* links for list of all helems */
72	int compare_weight;		/* compare weight (reversed) */
73	/* event callback */
74	snd_hctl_elem_callback_t callback;
75	void *callback_private;
76	/* links */
77	snd_hctl_t *hctl;		/* associated handle */
78};
79
80struct _snd_hctl {
81	snd_ctl_t *ctl;
82	struct list_head elems;		/* list of all controls */
83	unsigned int alloc;
84	unsigned int count;
85	snd_hctl_elem_t **pelems;
86	snd_hctl_compare_t compare;
87	snd_hctl_callback_t callback;
88	void *callback_private;
89};
90
91
92/* make local functions really local */
93#define snd_ctl_new	snd1_ctl_new
94
95int snd_ctl_new(snd_ctl_t **ctlp, snd_ctl_type_t type, const char *name);
96int _snd_ctl_poll_descriptor(snd_ctl_t *ctl);
97#define _snd_ctl_async_descriptor _snd_ctl_poll_descriptor
98int snd_ctl_hw_open(snd_ctl_t **handle, const char *name, int card, int mode);
99int snd_ctl_shm_open(snd_ctl_t **handlep, const char *name, const char *sockname, const char *sname, int mode);
100int snd_ctl_async(snd_ctl_t *ctl, int sig, pid_t pid);
101