ALSA project - the C library reference
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00001 00011 /* 00012 * This library is free software; you can redistribute it and/or modify 00013 * it under the terms of the GNU Lesser General Public License as 00014 * published by the Free Software Foundation; either version 2.1 of 00015 * the License, or (at your option) any later version. 00016 * 00017 * This program is distributed in the hope that it will be useful, 00018 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00019 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00020 * GNU Lesser General Public License for more details. 00021 * 00022 * You should have received a copy of the GNU Lesser General Public 00023 * License along with this library; if not, write to the Free Software 00024 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00025 * 00026 */ 00027 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 00126 #define SND_CTL_EVENT_MASK_TLV (1<<3) 00127 00129 #define SND_CTL_NAME_NONE "" 00130 00131 #define SND_CTL_NAME_PLAYBACK "Playback " 00132 00133 #define SND_CTL_NAME_CAPTURE "Capture " 00134 00136 #define SND_CTL_NAME_IEC958_NONE "" 00137 00138 #define SND_CTL_NAME_IEC958_SWITCH "Switch" 00139 00140 #define SND_CTL_NAME_IEC958_VOLUME "Volume" 00141 00142 #define SND_CTL_NAME_IEC958_DEFAULT "Default" 00143 00144 #define SND_CTL_NAME_IEC958_MASK "Mask" 00145 00146 #define SND_CTL_NAME_IEC958_CON_MASK "Con Mask" 00147 00148 #define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask" 00149 00150 #define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream" 00151 00152 #define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what 00153 00155 #define SND_CTL_POWER_MASK 0xff00 00156 00157 #define SND_CTL_POWER_D0 0x0000 00158 00159 #define SND_CTL_POWER_D1 0x0100 00160 00161 #define SND_CTL_POWER_D2 0x0200 00162 00163 #define SND_CTL_POWER_D3 0x0300 00164 00165 #define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000) 00166 00167 #define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001) 00168 00170 #define SND_CTL_TLVT_CONTAINER 0x0000 00171 00172 #define SND_CTL_TLVT_DB_SCALE 0x0001 00173 00174 #define SND_CTL_TLVT_DB_LINEAR 0x0002 00175 00176 #define SND_CTL_TLVT_DB_RANGE 0x0003 00177 00178 #define SND_CTL_TLVT_DB_MINMAX 0x0004 00179 00180 #define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005 00181 00183 #define SND_CTL_TLV_DB_GAIN_MUTE -9999999 00184 00186 typedef enum _snd_ctl_type { 00188 SND_CTL_TYPE_HW, 00190 SND_CTL_TYPE_SHM, 00192 SND_CTL_TYPE_INET, 00194 SND_CTL_TYPE_EXT 00195 } snd_ctl_type_t; 00196 00198 #define SND_CTL_NONBLOCK 0x0001 00199 00201 #define SND_CTL_ASYNC 0x0002 00202 00204 #define SND_CTL_READONLY 0x0004 00205 00207 typedef struct _snd_ctl snd_ctl_t; 00208 00210 #define SND_SCTL_NOFREE 0x0001 00211 00213 typedef struct _snd_sctl snd_sctl_t; 00214 00215 int snd_card_load(int card); 00216 int snd_card_next(int *card); 00217 int snd_card_get_index(const char *name); 00218 int snd_card_get_name(int card, char **name); 00219 int snd_card_get_longname(int card, char **name); 00220 00221 int snd_device_name_hint(int card, const char *iface, void ***hints); 00222 int snd_device_name_free_hint(void **hints); 00223 char *snd_device_name_get_hint(const void *hint, const char *id); 00224 00225 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode); 00226 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf); 00227 int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode); 00228 int snd_ctl_close(snd_ctl_t *ctl); 00229 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock); 00230 int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, 00231 snd_async_callback_t callback, void *private_data); 00232 snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler); 00233 int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl); 00234 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space); 00235 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents); 00236 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe); 00237 int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info); 00238 int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list); 00239 int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info); 00240 int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *value); 00241 int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *value); 00242 int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id); 00243 int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id); 00244 int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00245 unsigned int *tlv, unsigned int tlv_size); 00246 int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00247 const unsigned int *tlv); 00248 int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00249 const unsigned int *tlv); 00250 #ifdef __ALSA_HWDEP_H 00251 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device); 00252 int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info); 00253 #endif 00254 #ifdef __ALSA_PCM_H 00255 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device); 00256 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info); 00257 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev); 00258 #endif 00259 #ifdef __ALSA_RAWMIDI_H 00260 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device); 00261 int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info); 00262 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev); 00263 #endif 00264 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state); 00265 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state); 00266 00267 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event); 00268 int snd_ctl_wait(snd_ctl_t *ctl, int timeout); 00269 const char *snd_ctl_name(snd_ctl_t *ctl); 00270 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl); 00271 00272 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type); 00273 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface); 00274 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type); 00275 00276 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj); 00277 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj); 00278 void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr); 00279 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj); 00280 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj); 00281 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj); 00282 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj); 00283 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj); 00284 00285 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries); 00286 void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj); 00287 00288 char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id); 00289 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str); 00290 int snd_ctl_ascii_value_parse(snd_ctl_t *handle, 00291 snd_ctl_elem_value_t *dst, 00292 snd_ctl_elem_info_t *info, 00293 const char *value); 00294 00295 size_t snd_ctl_elem_id_sizeof(void); 00300 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id) 00301 int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr); 00302 void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj); 00303 void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj); 00304 void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src); 00305 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj); 00306 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj); 00307 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj); 00308 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj); 00309 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj); 00310 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj); 00311 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val); 00312 void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val); 00313 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val); 00314 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val); 00315 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val); 00316 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val); 00317 00318 size_t snd_ctl_card_info_sizeof(void); 00323 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info) 00324 int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr); 00325 void snd_ctl_card_info_free(snd_ctl_card_info_t *obj); 00326 void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj); 00327 void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src); 00328 int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj); 00329 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj); 00330 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj); 00331 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj); 00332 const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj); 00333 const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj); 00334 const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj); 00335 00336 size_t snd_ctl_event_sizeof(void); 00341 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event) 00342 int snd_ctl_event_malloc(snd_ctl_event_t **ptr); 00343 void snd_ctl_event_free(snd_ctl_event_t *obj); 00344 void snd_ctl_event_clear(snd_ctl_event_t *obj); 00345 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src); 00346 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj); 00347 00348 size_t snd_ctl_elem_list_sizeof(void); 00353 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list) 00354 int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr); 00355 void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj); 00356 void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj); 00357 void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src); 00358 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val); 00359 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj); 00360 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj); 00361 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr); 00362 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx); 00363 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx); 00364 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx); 00365 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx); 00366 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx); 00367 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx); 00368 00369 size_t snd_ctl_elem_info_sizeof(void); 00374 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info) 00375 int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr); 00376 void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj); 00377 void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj); 00378 void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src); 00379 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj); 00380 int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj); 00381 int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj); 00382 int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj); 00383 int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj); 00384 int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj); 00385 int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj); 00386 int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj); 00387 int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj); 00388 int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj); 00389 int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj); 00390 pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj); 00391 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj); 00392 long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj); 00393 long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj); 00394 long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj); 00395 long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj); 00396 long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj); 00397 long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj); 00398 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj); 00399 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val); 00400 const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj); 00401 int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj); 00402 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx); 00403 void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr); 00404 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj); 00405 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj); 00406 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj); 00407 unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj); 00408 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj); 00409 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj); 00410 void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr); 00411 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val); 00412 void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val); 00413 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val); 00414 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val); 00415 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val); 00416 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val); 00417 00418 int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long imin, long imax, long istep); 00419 int snd_ctl_elem_add_integer64(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long long imin, long long imax, long long istep); 00420 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count); 00421 int snd_ctl_elem_add_enumerated(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, unsigned int items, const char *const names[]); 00422 int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id); 00423 int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id); 00424 00425 size_t snd_ctl_elem_value_sizeof(void); 00430 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value) 00431 int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr); 00432 void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj); 00433 void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj); 00434 void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src); 00435 int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right); 00436 void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr); 00437 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj); 00438 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj); 00439 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj); 00440 unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj); 00441 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj); 00442 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj); 00443 void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr); 00444 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val); 00445 void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val); 00446 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val); 00447 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val); 00448 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val); 00449 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val); 00450 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx); 00451 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx); 00452 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx); 00453 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx); 00454 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx); 00455 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val); 00456 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val); 00457 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val); 00458 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val); 00459 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val); 00460 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size); 00461 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj); 00462 void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr); 00463 void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr); 00464 00465 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size, 00466 unsigned int **db_tlvp); 00467 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax, 00468 long *min, long *max); 00469 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax, 00470 long volume, long *db_gain); 00471 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax, 00472 long db_gain, long *value, int xdir); 00473 int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00474 long *min, long *max); 00475 int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00476 long volume, long *db_gain); 00477 int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00478 long db_gain, long *value, int xdir); 00479 00489 typedef struct _snd_hctl_elem snd_hctl_elem_t; 00490 00492 typedef struct _snd_hctl snd_hctl_t; 00493 00500 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1, 00501 const snd_hctl_elem_t *e2); 00502 int snd_hctl_compare_fast(const snd_hctl_elem_t *c1, 00503 const snd_hctl_elem_t *c2); 00511 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl, 00512 unsigned int mask, 00513 snd_hctl_elem_t *elem); 00520 typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, 00521 unsigned int mask); 00522 00523 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode); 00524 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl); 00525 int snd_hctl_close(snd_hctl_t *hctl); 00526 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock); 00527 int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl); 00528 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space); 00529 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents); 00530 unsigned int snd_hctl_get_count(snd_hctl_t *hctl); 00531 int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort); 00532 snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl); 00533 snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl); 00534 snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id); 00535 void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback); 00536 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data); 00537 void *snd_hctl_get_callback_private(snd_hctl_t *hctl); 00538 int snd_hctl_load(snd_hctl_t *hctl); 00539 int snd_hctl_free(snd_hctl_t *hctl); 00540 int snd_hctl_handle_events(snd_hctl_t *hctl); 00541 const char *snd_hctl_name(snd_hctl_t *hctl); 00542 int snd_hctl_wait(snd_hctl_t *hctl, int timeout); 00543 snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl); 00544 00545 snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem); 00546 snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem); 00547 int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info); 00548 int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value); 00549 int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value); 00550 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size); 00551 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv); 00552 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv); 00553 00554 snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem); 00555 00556 void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr); 00557 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj); 00558 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj); 00559 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj); 00560 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj); 00561 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj); 00562 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj); 00563 void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val); 00564 void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj); 00565 void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val); 00566 00578 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config, 00579 snd_config_t *private_data, int mode); 00580 int snd_sctl_free(snd_sctl_t *handle); 00581 int snd_sctl_install(snd_sctl_t *handle); 00582 int snd_sctl_remove(snd_sctl_t *handle); 00583 00586 #ifdef __cplusplus 00587 } 00588 #endif 00589 00590 #endif /* __ALSA_CONTROL_H */