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 #define SND_CTL_TLVT_CHMAP_FIXED 0x00101 00187 00188 #define SND_CTL_TLVT_CHMAP_VAR 0x00102 00189 00190 #define SND_CTL_TLVT_CHMAP_PAIRED 0x00103 00191 00193 typedef enum _snd_ctl_type { 00195 SND_CTL_TYPE_HW, 00197 SND_CTL_TYPE_SHM, 00199 SND_CTL_TYPE_INET, 00201 SND_CTL_TYPE_EXT 00202 } snd_ctl_type_t; 00203 00205 #define SND_CTL_NONBLOCK 0x0001 00206 00208 #define SND_CTL_ASYNC 0x0002 00209 00211 #define SND_CTL_READONLY 0x0004 00212 00214 typedef struct _snd_ctl snd_ctl_t; 00215 00217 #define SND_SCTL_NOFREE 0x0001 00218 00220 typedef struct _snd_sctl snd_sctl_t; 00221 00222 int snd_card_load(int card); 00223 int snd_card_next(int *card); 00224 int snd_card_get_index(const char *name); 00225 int snd_card_get_name(int card, char **name); 00226 int snd_card_get_longname(int card, char **name); 00227 00228 int snd_device_name_hint(int card, const char *iface, void ***hints); 00229 int snd_device_name_free_hint(void **hints); 00230 char *snd_device_name_get_hint(const void *hint, const char *id); 00231 00232 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode); 00233 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf); 00234 int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode); 00235 int snd_ctl_close(snd_ctl_t *ctl); 00236 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock); 00237 static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); } 00238 int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, 00239 snd_async_callback_t callback, void *private_data); 00240 snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler); 00241 int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl); 00242 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space); 00243 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents); 00244 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe); 00245 int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info); 00246 int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list); 00247 int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info); 00248 int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *value); 00249 int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *value); 00250 int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id); 00251 int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id); 00252 int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00253 unsigned int *tlv, unsigned int tlv_size); 00254 int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00255 const unsigned int *tlv); 00256 int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00257 const unsigned int *tlv); 00258 #ifdef __ALSA_HWDEP_H 00259 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device); 00260 int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info); 00261 #endif 00262 #ifdef __ALSA_PCM_H 00263 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device); 00264 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info); 00265 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev); 00266 #endif 00267 #ifdef __ALSA_RAWMIDI_H 00268 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device); 00269 int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info); 00270 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev); 00271 #endif 00272 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state); 00273 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state); 00274 00275 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event); 00276 int snd_ctl_wait(snd_ctl_t *ctl, int timeout); 00277 const char *snd_ctl_name(snd_ctl_t *ctl); 00278 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl); 00279 00280 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type); 00281 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface); 00282 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type); 00283 00284 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj); 00285 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj); 00286 void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr); 00287 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj); 00288 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj); 00289 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj); 00290 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj); 00291 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj); 00292 00293 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries); 00294 void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj); 00295 00296 char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id); 00297 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str); 00298 int snd_ctl_ascii_value_parse(snd_ctl_t *handle, 00299 snd_ctl_elem_value_t *dst, 00300 snd_ctl_elem_info_t *info, 00301 const char *value); 00302 00303 size_t snd_ctl_elem_id_sizeof(void); 00308 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id) 00309 int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr); 00310 void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj); 00311 void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj); 00312 void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src); 00313 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj); 00314 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj); 00315 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj); 00316 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj); 00317 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj); 00318 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj); 00319 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val); 00320 void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val); 00321 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val); 00322 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val); 00323 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val); 00324 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val); 00325 00326 size_t snd_ctl_card_info_sizeof(void); 00331 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info) 00332 int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr); 00333 void snd_ctl_card_info_free(snd_ctl_card_info_t *obj); 00334 void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj); 00335 void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src); 00336 int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj); 00337 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj); 00338 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj); 00339 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj); 00340 const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj); 00341 const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj); 00342 const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj); 00343 00344 size_t snd_ctl_event_sizeof(void); 00349 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event) 00350 int snd_ctl_event_malloc(snd_ctl_event_t **ptr); 00351 void snd_ctl_event_free(snd_ctl_event_t *obj); 00352 void snd_ctl_event_clear(snd_ctl_event_t *obj); 00353 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src); 00354 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj); 00355 00356 size_t snd_ctl_elem_list_sizeof(void); 00361 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list) 00362 int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr); 00363 void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj); 00364 void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj); 00365 void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src); 00366 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val); 00367 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj); 00368 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj); 00369 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr); 00370 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx); 00371 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx); 00372 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx); 00373 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx); 00374 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx); 00375 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx); 00376 00377 size_t snd_ctl_elem_info_sizeof(void); 00382 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info) 00383 int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr); 00384 void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj); 00385 void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj); 00386 void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src); 00387 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj); 00388 int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj); 00389 int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj); 00390 int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj); 00391 int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj); 00392 int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj); 00393 int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj); 00394 int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj); 00395 int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj); 00396 int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj); 00397 int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj); 00398 pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj); 00399 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj); 00400 long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj); 00401 long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj); 00402 long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj); 00403 long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj); 00404 long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj); 00405 long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj); 00406 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj); 00407 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val); 00408 const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj); 00409 int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj); 00410 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx); 00411 void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr); 00412 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj); 00413 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj); 00414 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj); 00415 unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj); 00416 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj); 00417 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj); 00418 void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr); 00419 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val); 00420 void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val); 00421 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val); 00422 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val); 00423 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val); 00424 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val); 00425 00426 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); 00427 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); 00428 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count); 00429 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[]); 00430 int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id); 00431 int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id); 00432 00433 size_t snd_ctl_elem_value_sizeof(void); 00438 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value) 00439 int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr); 00440 void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj); 00441 void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj); 00442 void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src); 00443 int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right); 00444 void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr); 00445 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj); 00446 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj); 00447 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj); 00448 unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj); 00449 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj); 00450 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj); 00451 void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr); 00452 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val); 00453 void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val); 00454 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val); 00455 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val); 00456 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val); 00457 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val); 00458 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx); 00459 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx); 00460 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx); 00461 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx); 00462 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx); 00463 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val); 00464 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val); 00465 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val); 00466 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val); 00467 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val); 00468 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size); 00469 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj); 00470 void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr); 00471 void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr); 00472 00473 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size, 00474 unsigned int **db_tlvp); 00475 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax, 00476 long *min, long *max); 00477 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax, 00478 long volume, long *db_gain); 00479 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax, 00480 long db_gain, long *value, int xdir); 00481 int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00482 long *min, long *max); 00483 int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00484 long volume, long *db_gain); 00485 int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, 00486 long db_gain, long *value, int xdir); 00487 00497 typedef struct _snd_hctl_elem snd_hctl_elem_t; 00498 00500 typedef struct _snd_hctl snd_hctl_t; 00501 00508 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1, 00509 const snd_hctl_elem_t *e2); 00510 int snd_hctl_compare_fast(const snd_hctl_elem_t *c1, 00511 const snd_hctl_elem_t *c2); 00519 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl, 00520 unsigned int mask, 00521 snd_hctl_elem_t *elem); 00528 typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, 00529 unsigned int mask); 00530 00531 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode); 00532 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl); 00533 int snd_hctl_close(snd_hctl_t *hctl); 00534 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock); 00535 static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); } 00536 int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl); 00537 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space); 00538 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents); 00539 unsigned int snd_hctl_get_count(snd_hctl_t *hctl); 00540 int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort); 00541 snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl); 00542 snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl); 00543 snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id); 00544 void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback); 00545 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data); 00546 void *snd_hctl_get_callback_private(snd_hctl_t *hctl); 00547 int snd_hctl_load(snd_hctl_t *hctl); 00548 int snd_hctl_free(snd_hctl_t *hctl); 00549 int snd_hctl_handle_events(snd_hctl_t *hctl); 00550 const char *snd_hctl_name(snd_hctl_t *hctl); 00551 int snd_hctl_wait(snd_hctl_t *hctl, int timeout); 00552 snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl); 00553 00554 snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem); 00555 snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem); 00556 int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info); 00557 int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value); 00558 int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value); 00559 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size); 00560 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv); 00561 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv); 00562 00563 snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem); 00564 00565 void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr); 00566 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj); 00567 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj); 00568 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj); 00569 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj); 00570 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj); 00571 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj); 00572 void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val); 00573 void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj); 00574 void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val); 00575 00587 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config, 00588 snd_config_t *private_data, int mode); 00589 int snd_sctl_free(snd_sctl_t *handle); 00590 int snd_sctl_install(snd_sctl_t *handle); 00591 int snd_sctl_remove(snd_sctl_t *handle); 00592 00595 #ifdef __cplusplus 00596 } 00597 #endif 00598 00599 #endif /* __ALSA_CONTROL_H */