1 /* 2 * Mixer Interface - local header file 3 * Copyright (c) 2000 by Jaroslav Kysela <perex (at) perex.cz> 4 * Copyright (c) 2001 by Abramo Bagnara <abramo (at) alsa-project.org> 5 * 6 * 7 * This library is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU Lesser General Public License as 9 * published by the Free Software Foundation; either version 2.1 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23 #include "local.h" 24 25 typedef struct _bag1 { 26 void *ptr; 27 struct list_head list; 28 } bag1_t; 29 30 typedef struct list_head bag_t; 31 32 int bag_new(bag_t **bag); 33 void bag_free(bag_t *bag); 34 int bag_add(bag_t *bag, void *ptr); 35 int bag_del(bag_t *bag, void *ptr); 36 int bag_empty(bag_t *bag); 37 void bag_del_all(bag_t *bag); 38 39 typedef struct list_head *bag_iterator_t; 40 41 #define bag_iterator_entry(i) (list_entry((i), bag1_t, list)->ptr) 42 #define bag_for_each(pos, bag) list_for_each(pos, bag) 43 #define bag_for_each_safe(pos, next, bag) list_for_each_safe(pos, next, bag) 44 45 struct _snd_mixer_class { 46 struct list_head list; 47 snd_mixer_t *mixer; 48 snd_mixer_event_t event; 49 void *private_data; 50 void (*private_free)(snd_mixer_class_t *class); 51 snd_mixer_compare_t compare; 52 }; 53 54 struct _snd_mixer_elem { 55 snd_mixer_elem_type_t type; 56 struct list_head list; /* links for list of all elems */ 57 snd_mixer_class_t *class; 58 void *private_data; 59 void (*private_free)(snd_mixer_elem_t *elem); 60 snd_mixer_elem_callback_t callback; 61 void *callback_private; 62 bag_t helems; 63 int compare_weight; /* compare weight (reversed) */ 64 }; 65 66 struct _snd_mixer { 67 struct list_head slaves; /* list of all slaves */ 68 struct list_head classes; /* list of all elem classes */ 69 struct list_head elems; /* list of all elems */ 70 snd_mixer_elem_t **pelems; /* array of all elems */ 71 unsigned int count; 72 unsigned int alloc; 73 unsigned int events; 74 snd_mixer_callback_t callback; 75 void *callback_private; 76 snd_mixer_compare_t compare; 77 }; 78 79 struct _snd_mixer_selem_id { 80 char name[60]; 81 unsigned int index; 82 }; 83
