/home/users/builder/rpm/BUILD/alsa-lib-1.0.13/include/control_external.h

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00001 
00010 /*
00011  *   This library is free software; you can redistribute it and/or modify
00012  *   it under the terms of the GNU Lesser General Public License as
00013  *   published by the Free Software Foundation; either version 2.1 of
00014  *   the License, or (at your option) any later version.
00015  *
00016  *   This program is distributed in the hope that it will be useful,
00017  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  *   GNU Lesser General Public License for more details.
00020  *
00021  *   You should have received a copy of the GNU Lesser General Public
00022  *   License along with this library; if not, write to the Free Software
00023  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
00024  *
00025  */
00026 #ifndef __ALSA_CONTROL_EXTERNAL_H
00027 #define __ALSA_CONTROL_EXTERNAL_H
00028 
00029 #include "control.h"
00030 
00031 #ifdef __cplusplus
00032 extern "C" {
00033 #endif
00034 
00043 #define SND_CTL_PLUGIN_ENTRY(name) _snd_ctl_##name##_open
00044 
00048 #define SND_CTL_PLUGIN_SYMBOL(name) SND_DLSYM_BUILD_VERSION(SND_CTL_PLUGIN_ENTRY(name), SND_CONTROL_DLSYM_VERSION);
00049 
00053 #define SND_CTL_PLUGIN_DEFINE_FUNC(plugin) \
00054 int SND_CTL_PLUGIN_ENTRY(plugin) (snd_ctl_t **handlep, const char *name,\
00055                                   snd_config_t *root, snd_config_t *conf, int mode)
00056 
00058 typedef struct snd_ctl_ext snd_ctl_ext_t;
00060 typedef struct snd_ctl_ext_callback snd_ctl_ext_callback_t;
00062 typedef unsigned long snd_ctl_ext_key_t;
00063 
00064 /*
00065  * Protocol version
00066  */
00067 #define SND_CTL_EXT_VERSION_MAJOR       1       
00068 #define SND_CTL_EXT_VERSION_MINOR       0       
00069 #define SND_CTL_EXT_VERSION_TINY        0       
00073 #define SND_CTL_EXT_VERSION             ((SND_CTL_EXT_VERSION_MAJOR<<16) |\
00074                                          (SND_CTL_EXT_VERSION_MINOR<<8) |\
00075                                          (SND_CTL_EXT_VERSION_TINY))
00076 
00078 struct snd_ctl_ext {
00083         unsigned int version;
00087         int card_idx;
00091         char id[16];
00095         char driver[16];
00099         char name[32];
00103         char longname[80];
00107         char mixername[80];
00111         int poll_fd;
00112 
00116         const snd_ctl_ext_callback_t *callback;
00120         void *private_data;
00124         snd_ctl_t *handle;
00125 
00126         int nonblock;                   
00127         int subscribed;                 
00128 };
00129 
00131 struct snd_ctl_ext_callback {
00135         void (*close)(snd_ctl_ext_t *ext);
00139         int (*elem_count)(snd_ctl_ext_t *ext);
00143         int (*elem_list)(snd_ctl_ext_t *ext, unsigned int offset, snd_ctl_elem_id_t *id);
00147         snd_ctl_ext_key_t (*find_elem)(snd_ctl_ext_t *ext, const snd_ctl_elem_id_t *id);
00151         void (*free_key)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key);
00155         int (*get_attribute)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key,
00156                              int *type, unsigned int *acc, unsigned int *count);
00160         int (*get_integer_info)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key,
00161                                 long *imin, long *imax, long *istep);
00165         int (*get_integer64_info)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key,
00166                                   int64_t *imin, int64_t *imax, int64_t *istep);
00170         int (*get_enumerated_info)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items);
00174         int (*get_enumerated_name)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int item,
00175                                    char *name, size_t name_max_len);
00179         int (*read_integer)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value);
00183         int (*read_integer64)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, int64_t *value);
00187         int (*read_enumerated)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items);
00191         int (*read_bytes)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned char *data,
00192                           size_t max_bytes);
00196         int (*read_iec958)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, snd_aes_iec958_t *iec958);
00200         int (*write_integer)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value);
00204         int (*write_integer64)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, int64_t *value);
00208         int (*write_enumerated)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items);
00212         int (*write_bytes)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned char *data,
00213                            size_t max_bytes);
00217         int (*write_iec958)(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, snd_aes_iec958_t *iec958);
00221         void (*subscribe_events)(snd_ctl_ext_t *ext, int subscribe);
00225         int (*read_event)(snd_ctl_ext_t *ext, snd_ctl_elem_id_t *id, unsigned int *event_mask);
00229         int (*poll_descriptors_count)(snd_ctl_ext_t *ext);
00233         int (*poll_descriptors)(snd_ctl_ext_t *ext, struct pollfd *pfds, unsigned int space);
00237         int (*poll_revents)(snd_ctl_ext_t *ext, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
00238 };
00239 
00243 typedef enum snd_ctl_ext_access {
00244         SND_CTL_EXT_ACCESS_READ = (1<<0),
00245         SND_CTL_EXT_ACCESS_WRITE = (1<<1),
00246         SND_CTL_EXT_ACCESS_READWRITE = (3<<0),
00247         SND_CTL_EXT_ACCESS_VOLATILE = (1<<2),
00248         SND_CTL_EXT_ACCESS_INACTIVE = (1<<8),
00249 } snd_ctl_ext_access_t;
00250 
00254 #define SND_CTL_EXT_KEY_NOT_FOUND       (snd_ctl_ext_key_t)(-1)
00255 
00256 int snd_ctl_ext_create(snd_ctl_ext_t *ext, const char *name, int mode);
00257 int snd_ctl_ext_delete(snd_ctl_ext_t *ext);
00258 
00261 #ifdef __cplusplus
00262 }
00263 #endif
00264 
00265 #endif /* __ALSA_CONTROL_EXTERNAL_H */

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