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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
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