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control.h

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00001 
00028 #ifndef __ALSA_CONTROL_H
00029 #define __ALSA_CONTROL_H
00030 
00031 #ifdef __cplusplus
00032 extern "C" {
00033 #endif
00034 
00043 #define SND_CONTROL_DLSYM_VERSION       _dlsym_control_001
00044 
00046 typedef struct snd_aes_iec958 {
00047         unsigned char status[24];       
00048         unsigned char subcode[147];     
00049         unsigned char pad;              
00050         unsigned char dig_subframe[4];  
00051 } snd_aes_iec958_t;
00052 
00054 typedef struct _snd_ctl_card_info snd_ctl_card_info_t;
00055 
00057 typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;
00058 
00060 typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
00061 
00063 typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
00064 
00066 typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
00067 
00069 typedef struct _snd_ctl_event snd_ctl_event_t;
00070 
00072 typedef enum _snd_ctl_elem_type {
00074         SND_CTL_ELEM_TYPE_NONE = 0,
00076         SND_CTL_ELEM_TYPE_BOOLEAN,
00078         SND_CTL_ELEM_TYPE_INTEGER,
00080         SND_CTL_ELEM_TYPE_ENUMERATED,
00082         SND_CTL_ELEM_TYPE_BYTES,
00084         SND_CTL_ELEM_TYPE_IEC958,
00086         SND_CTL_ELEM_TYPE_INTEGER64,
00087         SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
00088 } snd_ctl_elem_type_t;
00089 
00091 typedef enum _snd_ctl_elem_iface {
00093         SND_CTL_ELEM_IFACE_CARD = 0,
00095         SND_CTL_ELEM_IFACE_HWDEP,
00097         SND_CTL_ELEM_IFACE_MIXER,
00099         SND_CTL_ELEM_IFACE_PCM,
00101         SND_CTL_ELEM_IFACE_RAWMIDI,
00103         SND_CTL_ELEM_IFACE_TIMER,
00105         SND_CTL_ELEM_IFACE_SEQUENCER,
00106         SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
00107 } snd_ctl_elem_iface_t;
00108 
00110 typedef enum _snd_ctl_event_type {
00112         SND_CTL_EVENT_ELEM = 0,
00113         SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
00114 }snd_ctl_event_type_t;
00115 
00118 #define SND_CTL_EVENT_MASK_REMOVE       (~0U)
00119 
00120 #define SND_CTL_EVENT_MASK_VALUE        (1<<0)
00121 
00122 #define SND_CTL_EVENT_MASK_INFO         (1<<1)
00123 
00124 #define SND_CTL_EVENT_MASK_ADD          (1<<2)
00125 
00127 #define SND_CTL_NAME_NONE                               ""
00128 
00129 #define SND_CTL_NAME_PLAYBACK                           "Playback "
00130 
00131 #define SND_CTL_NAME_CAPTURE                            "Capture "
00132 
00134 #define SND_CTL_NAME_IEC958_NONE                        ""
00135 
00136 #define SND_CTL_NAME_IEC958_SWITCH                      "Switch"
00137 
00138 #define SND_CTL_NAME_IEC958_VOLUME                      "Volume"
00139 
00140 #define SND_CTL_NAME_IEC958_DEFAULT                     "Default"
00141 
00142 #define SND_CTL_NAME_IEC958_MASK                        "Mask"
00143 
00144 #define SND_CTL_NAME_IEC958_CON_MASK                    "Con Mask"
00145 
00146 #define SND_CTL_NAME_IEC958_PRO_MASK                    "Pro Mask"
00147 
00148 #define SND_CTL_NAME_IEC958_PCM_STREAM                  "PCM Stream"
00149 
00150 #define SND_CTL_NAME_IEC958(expl,direction,what)        "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
00151 
00153 #define SND_CTL_POWER_MASK              0xff00
00154 
00155 #define SND_CTL_POWER_D0                0x0000
00156 
00157 #define SND_CTL_POWER_D1                0x0100
00158 
00159 #define SND_CTL_POWER_D2                0x0200
00160 
00161 #define SND_CTL_POWER_D3                0x0300
00162 
00163 #define SND_CTL_POWER_D3hot             (SND_CTL_POWER_D3|0x0000)
00164 
00165 #define SND_CTL_POWER_D3cold            (SND_CTL_POWER_D3|0x0001)
00166 
00168 typedef enum _snd_ctl_type {
00170         SND_CTL_TYPE_HW,
00172         SND_CTL_TYPE_SHM,
00174         SND_CTL_TYPE_INET
00175 } snd_ctl_type_t;
00176 
00178 #define SND_CTL_NONBLOCK                0x0001
00179 
00181 #define SND_CTL_ASYNC                   0x0002
00182 
00184 typedef struct _snd_ctl snd_ctl_t;
00185 
00187 #define SND_SCTL_NOFREE                 0x0001
00188 
00190 typedef struct _snd_sctl snd_sctl_t;
00191 
00192 int snd_card_load(int card);
00193 int snd_card_next(int *card);
00194 int snd_card_get_index(const char *name);
00195 int snd_card_get_name(int card, char **name);
00196 int snd_card_get_longname(int card, char **name);
00197 
00198 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
00199 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
00200 int snd_ctl_close(snd_ctl_t *ctl);
00201 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
00202 int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, 
00203                               snd_async_callback_t callback, void *private_data);
00204 snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler);
00205 int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl);
00206 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
00207 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
00208 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
00209 int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info);
00210 int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t * list);
00211 int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
00212 int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
00213 int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
00214 int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00215 int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00216 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
00217 int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info);
00218 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
00219 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
00220 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
00221 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
00222 int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info);
00223 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
00224 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
00225 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
00226 
00227 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
00228 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
00229 const char *snd_ctl_name(snd_ctl_t *ctl);
00230 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
00231 
00232 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
00233 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
00234 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
00235 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
00236 
00237 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
00238 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
00239 void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr);
00240 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj);
00241 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
00242 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
00243 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
00244 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
00245 
00246 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
00247 void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj);
00248 
00249 size_t snd_ctl_elem_id_sizeof(void);
00254 #define snd_ctl_elem_id_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_id_t *) alloca(snd_ctl_elem_id_sizeof()); memset(*ptr, 0, snd_ctl_elem_id_sizeof()); } while (0)
00255 int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr);
00256 void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj);
00257 void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj);
00258 void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src);
00259 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
00260 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj);
00261 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
00262 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
00263 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
00264 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
00265 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
00266 void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val);
00267 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
00268 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
00269 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
00270 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
00271 
00272 size_t snd_ctl_card_info_sizeof(void);
00277 #define snd_ctl_card_info_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_card_info_t *) alloca(snd_ctl_card_info_sizeof()); memset(*ptr, 0, snd_ctl_card_info_sizeof()); } while (0)
00278 int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr);
00279 void snd_ctl_card_info_free(snd_ctl_card_info_t *obj);
00280 void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj);
00281 void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src);
00282 int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj);
00283 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
00284 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
00285 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
00286 const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj);
00287 const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj);
00288 const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj);
00289 
00290 size_t snd_ctl_event_sizeof(void);
00295 #define snd_ctl_event_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_event_t *) alloca(snd_ctl_event_sizeof()); memset(*ptr, 0, snd_ctl_event_sizeof()); } while (0)
00296 int snd_ctl_event_malloc(snd_ctl_event_t **ptr);
00297 void snd_ctl_event_free(snd_ctl_event_t *obj);
00298 void snd_ctl_event_clear(snd_ctl_event_t *obj);
00299 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
00300 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);
00301 
00302 size_t snd_ctl_elem_list_sizeof(void);
00307 #define snd_ctl_elem_list_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_list_t *) alloca(snd_ctl_elem_list_sizeof()); memset(*ptr, 0, snd_ctl_elem_list_sizeof()); } while (0)
00308 int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr);
00309 void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj);
00310 void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj);
00311 void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src);
00312 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
00313 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
00314 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
00315 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
00316 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
00317 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx);
00318 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
00319 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
00320 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
00321 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
00322 
00323 size_t snd_ctl_elem_info_sizeof(void);
00328 #define snd_ctl_elem_info_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_info_t *) alloca(snd_ctl_elem_info_sizeof()); memset(*ptr, 0, snd_ctl_elem_info_sizeof()); } while (0)
00329 int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr);
00330 void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj);
00331 void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj);
00332 void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src);
00333 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);
00334 int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj);
00335 int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj);
00336 int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj);
00337 int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj);
00338 int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj);
00339 int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj);
00340 int snd_ctl_elem_info_is_indirect(const snd_ctl_elem_info_t *obj);
00341 pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj);
00342 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
00343 long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj);
00344 long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj);
00345 long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj);
00346 long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj);
00347 long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj);
00348 long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj);
00349 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
00350 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
00351 const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj);
00352 void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr);
00353 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
00354 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);
00355 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
00356 unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj);
00357 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
00358 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
00359 void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr);
00360 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
00361 void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);
00362 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
00363 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
00364 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
00365 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
00366 
00367 size_t snd_ctl_elem_value_sizeof(void);
00372 #define snd_ctl_elem_value_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_value_t *) alloca(snd_ctl_elem_value_sizeof()); memset(*ptr, 0, snd_ctl_elem_value_sizeof()); } while (0)
00373 int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);
00374 void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);
00375 void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);
00376 void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);
00377 void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);
00378 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
00379 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);
00380 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
00381 unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj);
00382 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
00383 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
00384 void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr);
00385 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
00386 void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);
00387 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
00388 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
00389 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
00390 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
00391 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
00392 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
00393 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
00394 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
00395 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
00396 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
00397 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
00398 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
00399 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
00400 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
00401 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
00402 void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);
00403 void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);
00404 
00414 typedef struct _snd_hctl_elem snd_hctl_elem_t;
00415 
00417 typedef struct _snd_hctl snd_hctl_t;
00418 
00425 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
00426                                   const snd_hctl_elem_t *e2);
00427 int snd_hctl_compare_fast(const snd_hctl_elem_t *c1,
00428                           const snd_hctl_elem_t *c2);
00436 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
00437                                    unsigned int mask,
00438                                    snd_hctl_elem_t *elem);
00445 typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem,
00446                                         unsigned int mask);
00447 
00448 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
00449 int snd_hctl_close(snd_hctl_t *hctl);
00450 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
00451 int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl);
00452 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
00453 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
00454 int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort);
00455 snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl);
00456 snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl);
00457 snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id);
00458 void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback);
00459 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
00460 void *snd_hctl_get_callback_private(snd_hctl_t *hctl);
00461 int snd_hctl_load(snd_hctl_t *hctl);
00462 int snd_hctl_free(snd_hctl_t *hctl);
00463 int snd_hctl_handle_events(snd_hctl_t *hctl);
00464 const char *snd_hctl_name(snd_hctl_t *hctl);
00465 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
00466 
00467 snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem);
00468 snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem);
00469 int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info);
00470 int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
00471 int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
00472 
00473 snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem);
00474 
00475 void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr);
00476 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
00477 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);
00478 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
00479 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
00480 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
00481 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
00482 void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val);
00483 void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj);
00484 void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val);
00485 
00497 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
00498                    snd_config_t *private_data, int mode);
00499 int snd_sctl_free(snd_sctl_t *handle);
00500 int snd_sctl_install(snd_sctl_t *handle);
00501 int snd_sctl_remove(snd_sctl_t *handle);
00502 
00505 #ifdef __cplusplus
00506 }
00507 #endif
00508 
00509 #endif /* __ALSA_CONTROL_H */

Generated on Thu Oct 24 15:14:52 2002 for ALSA project - the C library reference by doxygen1.2.14 written by Dimitri van Heesch, © 1997-2002