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control.h

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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_close(snd_ctl_t *ctl);
00228 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
00229 int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, 
00230                               snd_async_callback_t callback, void *private_data);
00231 snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler);
00232 int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl);
00233 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
00234 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
00235 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
00236 int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info);
00237 int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list);
00238 int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
00239 int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
00240 int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
00241 int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00242 int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00243 int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00244                           unsigned int *tlv, unsigned int tlv_size);
00245 int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00246                            const unsigned int *tlv);
00247 int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00248                              const unsigned int *tlv);
00249 #ifdef __ALSA_HWDEP_H
00250 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
00251 int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info);
00252 #endif
00253 #ifdef __ALSA_PCM_H
00254 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
00255 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
00256 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
00257 #endif
00258 #ifdef __ALSA_RAWMIDI_H
00259 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
00260 int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info);
00261 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
00262 #endif
00263 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
00264 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
00265 
00266 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
00267 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
00268 const char *snd_ctl_name(snd_ctl_t *ctl);
00269 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
00270 
00271 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
00272 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
00273 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
00274 
00275 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
00276 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
00277 void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr);
00278 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj);
00279 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
00280 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
00281 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
00282 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
00283 
00284 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
00285 void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj);
00286 
00287 char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id);
00288 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
00289 int snd_ctl_ascii_value_parse(snd_ctl_t *handle,
00290                               snd_ctl_elem_value_t *dst,
00291                               snd_ctl_elem_info_t *info,
00292                               const char *value);
00293 
00294 size_t snd_ctl_elem_id_sizeof(void);
00299 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
00300 int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr);
00301 void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj);
00302 void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj);
00303 void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src);
00304 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
00305 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj);
00306 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
00307 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
00308 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
00309 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
00310 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
00311 void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val);
00312 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
00313 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
00314 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
00315 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
00316 
00317 size_t snd_ctl_card_info_sizeof(void);
00322 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
00323 int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr);
00324 void snd_ctl_card_info_free(snd_ctl_card_info_t *obj);
00325 void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj);
00326 void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src);
00327 int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj);
00328 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
00329 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
00330 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
00331 const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj);
00332 const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj);
00333 const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj);
00334 
00335 size_t snd_ctl_event_sizeof(void);
00340 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
00341 int snd_ctl_event_malloc(snd_ctl_event_t **ptr);
00342 void snd_ctl_event_free(snd_ctl_event_t *obj);
00343 void snd_ctl_event_clear(snd_ctl_event_t *obj);
00344 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
00345 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);
00346 
00347 size_t snd_ctl_elem_list_sizeof(void);
00352 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
00353 int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr);
00354 void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj);
00355 void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj);
00356 void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src);
00357 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
00358 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
00359 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
00360 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
00361 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
00362 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx);
00363 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
00364 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
00365 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
00366 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
00367 
00368 size_t snd_ctl_elem_info_sizeof(void);
00373 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
00374 int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr);
00375 void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj);
00376 void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj);
00377 void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src);
00378 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);
00379 int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj);
00380 int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj);
00381 int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj);
00382 int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj);
00383 int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj);
00384 int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj);
00385 int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj);
00386 int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj);
00387 int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj);
00388 int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj);
00389 pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj);
00390 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
00391 long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj);
00392 long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj);
00393 long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj);
00394 long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj);
00395 long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj);
00396 long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj);
00397 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
00398 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
00399 const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj);
00400 int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj);
00401 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
00402 void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr);
00403 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
00404 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);
00405 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
00406 unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj);
00407 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
00408 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
00409 void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr);
00410 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
00411 void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);
00412 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
00413 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
00414 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
00415 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
00416 
00417 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);
00418 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);
00419 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
00420 int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id);
00421 int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00422 
00423 size_t snd_ctl_elem_value_sizeof(void);
00428 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
00429 int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);
00430 void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);
00431 void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);
00432 void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);
00433 int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right);
00434 void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);
00435 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
00436 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);
00437 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
00438 unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj);
00439 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
00440 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
00441 void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr);
00442 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
00443 void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);
00444 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
00445 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
00446 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
00447 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
00448 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
00449 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
00450 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
00451 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
00452 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
00453 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
00454 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
00455 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
00456 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
00457 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
00458 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
00459 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
00460 void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);
00461 void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);
00462 
00463 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
00464                           unsigned int **db_tlvp);
00465 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
00466                          long *min, long *max);
00467 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
00468                           long volume, long *db_gain);
00469 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
00470                             long db_gain, long *value, int xdir);
00471 int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00472                          long *min, long *max);
00473 int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00474                           long volume, long *db_gain);
00475 int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00476                             long db_gain, long *value, int xdir);
00477 
00487 typedef struct _snd_hctl_elem snd_hctl_elem_t;
00488 
00490 typedef struct _snd_hctl snd_hctl_t;
00491 
00498 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
00499                                   const snd_hctl_elem_t *e2);
00500 int snd_hctl_compare_fast(const snd_hctl_elem_t *c1,
00501                           const snd_hctl_elem_t *c2);
00509 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
00510                                    unsigned int mask,
00511                                    snd_hctl_elem_t *elem);
00518 typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem,
00519                                         unsigned int mask);
00520 
00521 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
00522 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
00523 int snd_hctl_close(snd_hctl_t *hctl);
00524 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
00525 int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl);
00526 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
00527 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
00528 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
00529 int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort);
00530 snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl);
00531 snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl);
00532 snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id);
00533 void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback);
00534 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
00535 void *snd_hctl_get_callback_private(snd_hctl_t *hctl);
00536 int snd_hctl_load(snd_hctl_t *hctl);
00537 int snd_hctl_free(snd_hctl_t *hctl);
00538 int snd_hctl_handle_events(snd_hctl_t *hctl);
00539 const char *snd_hctl_name(snd_hctl_t *hctl);
00540 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
00541 snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl);
00542 
00543 snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem);
00544 snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem);
00545 int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info);
00546 int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
00547 int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
00548 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
00549 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
00550 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
00551 
00552 snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem);
00553 
00554 void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr);
00555 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
00556 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);
00557 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
00558 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
00559 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
00560 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
00561 void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val);
00562 void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj);
00563 void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val);
00564 
00576 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
00577                    snd_config_t *private_data, int mode);
00578 int snd_sctl_free(snd_sctl_t *handle);
00579 int snd_sctl_install(snd_sctl_t *handle);
00580 int snd_sctl_remove(snd_sctl_t *handle);
00581 
00584 #ifdef __cplusplus
00585 }
00586 #endif
00587 
00588 #endif /* __ALSA_CONTROL_H */

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