/usr/src/startcom/BUILD/alsa-lib-1.0.17a/include/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 
00179 #define SND_CTL_TLV_DB_GAIN_MUTE        -9999999
00180 
00182 typedef enum _snd_ctl_type {
00184         SND_CTL_TYPE_HW,
00186         SND_CTL_TYPE_SHM,
00188         SND_CTL_TYPE_INET,
00190         SND_CTL_TYPE_EXT
00191 } snd_ctl_type_t;
00192 
00194 #define SND_CTL_NONBLOCK                0x0001
00195 
00197 #define SND_CTL_ASYNC                   0x0002
00198 
00200 #define SND_CTL_READONLY                0x0004
00201 
00203 typedef struct _snd_ctl snd_ctl_t;
00204 
00206 #define SND_SCTL_NOFREE                 0x0001
00207 
00209 typedef struct _snd_sctl snd_sctl_t;
00210 
00211 int snd_card_load(int card);
00212 int snd_card_next(int *card);
00213 int snd_card_get_index(const char *name);
00214 int snd_card_get_name(int card, char **name);
00215 int snd_card_get_longname(int card, char **name);
00216 
00217 int snd_device_name_hint(int card, const char *iface, void ***hints);
00218 int snd_device_name_free_hint(void **hints);
00219 char *snd_device_name_get_hint(const void *hint, const char *id);
00220 
00221 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
00222 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
00223 int snd_ctl_close(snd_ctl_t *ctl);
00224 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
00225 int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, 
00226                               snd_async_callback_t callback, void *private_data);
00227 snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler);
00228 int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl);
00229 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
00230 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
00231 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
00232 int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info);
00233 int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list);
00234 int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
00235 int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
00236 int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
00237 int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00238 int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00239 int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00240                           unsigned int *tlv, unsigned int tlv_size);
00241 int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00242                            const unsigned int *tlv);
00243 int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00244                              const unsigned int *tlv);
00245 #ifdef __ALSA_HWDEP_H
00246 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
00247 int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info);
00248 #endif
00249 #ifdef __ALSA_PCM_H
00250 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
00251 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
00252 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
00253 #endif
00254 #ifdef __ALSA_RAWMIDI_H
00255 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
00256 int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info);
00257 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
00258 #endif
00259 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
00260 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
00261 
00262 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
00263 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
00264 const char *snd_ctl_name(snd_ctl_t *ctl);
00265 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
00266 
00267 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
00268 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
00269 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
00270 
00271 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
00272 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
00273 void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr);
00274 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj);
00275 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
00276 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
00277 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
00278 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
00279 
00280 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
00281 void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj);
00282 
00283 size_t snd_ctl_elem_id_sizeof(void);
00288 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
00289 int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr);
00290 void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj);
00291 void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj);
00292 void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src);
00293 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
00294 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj);
00295 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
00296 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
00297 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
00298 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
00299 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
00300 void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val);
00301 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
00302 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
00303 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
00304 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
00305 
00306 size_t snd_ctl_card_info_sizeof(void);
00311 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
00312 int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr);
00313 void snd_ctl_card_info_free(snd_ctl_card_info_t *obj);
00314 void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj);
00315 void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src);
00316 int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj);
00317 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
00318 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
00319 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
00320 const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj);
00321 const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj);
00322 const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj);
00323 
00324 size_t snd_ctl_event_sizeof(void);
00329 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
00330 int snd_ctl_event_malloc(snd_ctl_event_t **ptr);
00331 void snd_ctl_event_free(snd_ctl_event_t *obj);
00332 void snd_ctl_event_clear(snd_ctl_event_t *obj);
00333 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
00334 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);
00335 
00336 size_t snd_ctl_elem_list_sizeof(void);
00341 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
00342 int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr);
00343 void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj);
00344 void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj);
00345 void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src);
00346 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
00347 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
00348 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
00349 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
00350 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
00351 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx);
00352 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
00353 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
00354 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
00355 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
00356 
00357 size_t snd_ctl_elem_info_sizeof(void);
00362 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
00363 int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr);
00364 void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj);
00365 void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj);
00366 void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src);
00367 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);
00368 int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj);
00369 int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj);
00370 int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj);
00371 int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj);
00372 int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj);
00373 int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj);
00374 int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj);
00375 int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj);
00376 int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj);
00377 int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj);
00378 pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj);
00379 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
00380 long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj);
00381 long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj);
00382 long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj);
00383 long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj);
00384 long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj);
00385 long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj);
00386 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
00387 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
00388 const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj);
00389 int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj);
00390 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
00391 void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr);
00392 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
00393 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);
00394 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
00395 unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj);
00396 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
00397 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
00398 void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr);
00399 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
00400 void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);
00401 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
00402 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
00403 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
00404 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
00405 
00406 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);
00407 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);
00408 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
00409 int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id);
00410 int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
00411 
00412 size_t snd_ctl_elem_value_sizeof(void);
00417 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
00418 int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);
00419 void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);
00420 void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);
00421 void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);
00422 void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);
00423 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
00424 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);
00425 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
00426 unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj);
00427 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
00428 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
00429 void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr);
00430 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
00431 void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);
00432 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
00433 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
00434 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
00435 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
00436 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
00437 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
00438 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
00439 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
00440 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
00441 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
00442 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
00443 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
00444 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
00445 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
00446 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
00447 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
00448 void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);
00449 void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);
00450 
00451 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
00452                           unsigned int **db_tlvp);
00453 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
00454                          long *min, long *max);
00455 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
00456                           long volume, long *db_gain);
00457 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
00458                             long db_gain, long *value, int xdir);
00459 int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00460                          long *min, long *max);
00461 int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00462                           long volume, long *db_gain);
00463 int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
00464                             long db_gain, long *value, int xdir);
00465 
00475 typedef struct _snd_hctl_elem snd_hctl_elem_t;
00476 
00478 typedef struct _snd_hctl snd_hctl_t;
00479 
00486 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
00487                                   const snd_hctl_elem_t *e2);
00488 int snd_hctl_compare_fast(const snd_hctl_elem_t *c1,
00489                           const snd_hctl_elem_t *c2);
00497 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
00498                                    unsigned int mask,
00499                                    snd_hctl_elem_t *elem);
00506 typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem,
00507                                         unsigned int mask);
00508 
00509 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
00510 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
00511 int snd_hctl_close(snd_hctl_t *hctl);
00512 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
00513 int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl);
00514 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
00515 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
00516 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
00517 int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort);
00518 snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl);
00519 snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl);
00520 snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id);
00521 void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback);
00522 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
00523 void *snd_hctl_get_callback_private(snd_hctl_t *hctl);
00524 int snd_hctl_load(snd_hctl_t *hctl);
00525 int snd_hctl_free(snd_hctl_t *hctl);
00526 int snd_hctl_handle_events(snd_hctl_t *hctl);
00527 const char *snd_hctl_name(snd_hctl_t *hctl);
00528 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
00529 snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl);
00530 
00531 snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem);
00532 snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem);
00533 int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info);
00534 int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
00535 int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
00536 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
00537 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
00538 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
00539 
00540 snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem);
00541 
00542 void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr);
00543 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
00544 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);
00545 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
00546 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
00547 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
00548 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
00549 void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val);
00550 void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj);
00551 void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val);
00552 
00564 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
00565                    snd_config_t *private_data, int mode);
00566 int snd_sctl_free(snd_sctl_t *handle);
00567 int snd_sctl_install(snd_sctl_t *handle);
00568 int snd_sctl_remove(snd_sctl_t *handle);
00569 
00572 #ifdef __cplusplus
00573 }
00574 #endif
00575 
00576 #endif /* __ALSA_CONTROL_H */

Generated on Fri Jan 23 21:14:29 2009 for ALSA project - the C library reference by  doxygen 1.4.7