ALSA project - the C library reference
control.h
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1
11/*
12 * This library is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Lesser General Public License as
14 * published by the Free Software Foundation; either version 2.1 of
15 * the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Lesser General Public License for more details.
21 *
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with this library; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 *
26 */
27
28#ifndef __ALSA_CONTROL_H
29#define __ALSA_CONTROL_H
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
43#define SND_CONTROL_DLSYM_VERSION _dlsym_control_001
44
46typedef struct snd_aes_iec958 {
47 unsigned char status[24];
48 unsigned char subcode[147];
49 unsigned char pad;
50 unsigned char dig_subframe[4];
52
54typedef struct _snd_ctl_card_info snd_ctl_card_info_t;
55
57typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;
58
60typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
61
63typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
64
66typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
67
69typedef struct _snd_ctl_event snd_ctl_event_t;
70
72typedef enum _snd_ctl_elem_type {
87 SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
89
91typedef enum _snd_ctl_elem_iface {
106 SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
108
110typedef enum _snd_ctl_event_type {
113 SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
115
118#define SND_CTL_EVENT_MASK_REMOVE (~0U)
120#define SND_CTL_EVENT_MASK_VALUE (1<<0)
122#define SND_CTL_EVENT_MASK_INFO (1<<1)
124#define SND_CTL_EVENT_MASK_ADD (1<<2)
126#define SND_CTL_EVENT_MASK_TLV (1<<3)
127
129#define SND_CTL_NAME_NONE ""
131#define SND_CTL_NAME_PLAYBACK "Playback "
133#define SND_CTL_NAME_CAPTURE "Capture "
134
136#define SND_CTL_NAME_IEC958_NONE ""
138#define SND_CTL_NAME_IEC958_SWITCH "Switch"
140#define SND_CTL_NAME_IEC958_VOLUME "Volume"
142#define SND_CTL_NAME_IEC958_DEFAULT "Default"
144#define SND_CTL_NAME_IEC958_MASK "Mask"
146#define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
148#define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
150#define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
152#define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
153
155#define SND_CTL_POWER_MASK 0xff00
157#define SND_CTL_POWER_D0 0x0000
159#define SND_CTL_POWER_D1 0x0100
161#define SND_CTL_POWER_D2 0x0200
163#define SND_CTL_POWER_D3 0x0300
165#define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
167#define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
168
170#define SND_CTL_TLVT_CONTAINER 0x0000
172#define SND_CTL_TLVT_DB_SCALE 0x0001
174#define SND_CTL_TLVT_DB_LINEAR 0x0002
176#define SND_CTL_TLVT_DB_RANGE 0x0003
178#define SND_CTL_TLVT_DB_MINMAX 0x0004
180#define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005
181
183#define SND_CTL_TLV_DB_GAIN_MUTE -9999999
184
186#define SND_CTL_TLVT_CHMAP_FIXED 0x00101
188#define SND_CTL_TLVT_CHMAP_VAR 0x00102
190#define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
191
193typedef enum _snd_ctl_type {
203
205#define SND_CTL_NONBLOCK 0x0001
206
208#define SND_CTL_ASYNC 0x0002
209
211#define SND_CTL_READONLY 0x0004
212
214typedef struct _snd_ctl snd_ctl_t;
215
217#define SND_SCTL_NOFREE 0x0001
218
220typedef struct _snd_sctl snd_sctl_t;
221
222int snd_card_load(int card);
223int snd_card_next(int *card);
224int snd_card_get_index(const char *name);
225int snd_card_get_name(int card, char **name);
226int snd_card_get_longname(int card, char **name);
227
228int snd_device_name_hint(int card, const char *iface, void ***hints);
229int snd_device_name_free_hint(void **hints);
230char *snd_device_name_get_hint(const void *hint, const char *id);
231
232int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
233int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
234int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
235int snd_ctl_close(snd_ctl_t *ctl);
236int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
237static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }
239 snd_async_callback_t callback, void *private_data);
242int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
243int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
244int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
253 unsigned int *tlv, unsigned int tlv_size);
255 const unsigned int *tlv);
257 const unsigned int *tlv);
258#ifdef __ALSA_HWDEP_H
259int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
261#endif
262#ifdef __ALSA_PCM_H
263int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
265int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
266#endif
267#ifdef __ALSA_RAWMIDI_H
268int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
270int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
271#endif
272int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
273int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
274
275int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
276int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
277const char *snd_ctl_name(snd_ctl_t *ctl);
279
283
284unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
285unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
288unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
290const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
291unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
292
293int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
295
297int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
301 const char *value);
302
303size_t snd_ctl_elem_id_sizeof(void);
308#define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
313unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
315unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
316unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
317const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
318unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
319void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
321void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
322void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
323void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
324void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
325
326size_t snd_ctl_card_info_sizeof(void);
331#define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
337const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
339const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
343
344size_t snd_ctl_event_sizeof(void);
349#define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
355
356size_t snd_ctl_elem_list_sizeof(void);
361#define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
366void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
367unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
368unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
369void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
370unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
372unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
373unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
374const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
375unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
376
377size_t snd_ctl_elem_info_sizeof(void);
382#define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
399unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
406unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
407void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
410int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
412 const int dimension[4]);
414unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
418const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
419unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
421void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
423void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
424void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
425void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
426void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
427
429 unsigned int element_count,
430 unsigned int member_count,
431 long min, long max, long step);
433 unsigned int element_count,
434 unsigned int member_count,
435 long long min, long long max,
436 long long step);
438 unsigned int element_count,
439 unsigned int member_count);
441 unsigned int element_count,
442 unsigned int member_count,
443 unsigned int items,
444 const char *const labels[]);
446 unsigned int element_count,
447 unsigned int member_count);
448
449int 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);
450int 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);
451int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
452int 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[]);
455
456size_t snd_ctl_elem_value_sizeof(void);
461#define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
475void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
477void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
478void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
479void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
480void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
481int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
482long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
483long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
484unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
485unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
486void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
487void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
488void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
489void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
490void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
491void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
495
496int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
497 unsigned int **db_tlvp);
498int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
499 long *min, long *max);
500int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
501 long volume, long *db_gain);
502int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
503 long db_gain, long *value, int xdir);
505 long *min, long *max);
507 long volume, long *db_gain);
509 long db_gain, long *value, int xdir);
510
520typedef struct _snd_hctl_elem snd_hctl_elem_t;
521
523typedef struct _snd_hctl snd_hctl_t;
524
531typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
532 const snd_hctl_elem_t *e2);
534 const snd_hctl_elem_t *c2);
542typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
543 unsigned int mask,
544 snd_hctl_elem_t *elem);
552 unsigned int mask);
553
554int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
555int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
556int snd_hctl_close(snd_hctl_t *hctl);
557int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
558static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
560int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
561int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
562unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
568void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
570int snd_hctl_load(snd_hctl_t *hctl);
571int snd_hctl_free(snd_hctl_t *hctl);
573const char *snd_hctl_name(snd_hctl_t *hctl);
574int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
576
582int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
583int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
584int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
585
587
589unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
591unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
592unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
593const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
594unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
598
610int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
611 snd_config_t *private_data, int mode);
612int snd_sctl_free(snd_sctl_t *handle);
613int snd_sctl_install(snd_sctl_t *handle);
614int snd_sctl_remove(snd_sctl_t *handle);
615
618#ifdef __cplusplus
619}
620#endif
621
622#endif /* __ALSA_CONTROL_H */
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:1081
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:1093
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:1045
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:1105
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:1033
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:1069
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:1057
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:1117
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode)
Opens a fallback CTL.
Definition: control.c:1432
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:2760
void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
Set interface part of element identifier to given data of an element.
Definition: control.c:2928
int snd_ctl_ascii_value_parse(snd_ctl_t *handle, snd_ctl_elem_value_t *dst, snd_ctl_elem_info_t *info, const char *value)
parse ASCII string as CTL element value
Definition: ctlparse.c:315
struct _snd_ctl snd_ctl_t
Definition: control.h:214
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2198
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:152
void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
Set value for a specified member to given data as an element of byte type.
Definition: control.c:3111
unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj)
Get total count of elements present in CTL device (information present in every filled CTL element id...
Definition: control.c:2097
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
clear given snd_ctl_elem_list_t object
Definition: control.c:2054
void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj)
frees a previously allocated snd_ctl_elem_id_t
Definition: control.c:1669
int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax, long db_gain, long *value, int xdir)
Convert from dB gain to the corresponding raw value.
Definition: tlv.c:292
snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj)
Get type from a CTL element id/info.
Definition: control.c:2251
int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state)
Set Power State to given SND_CTL_POWER_* value and do the power management.
Definition: control.c:1129
void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val)
Set element numeric identifier of a CTL element id/info.
Definition: control.c:2695
int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj)
Get card number from a CTL card info.
Definition: control.c:1883
snd_ctl_elem_iface_t
Definition: control.h:91
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2519
int snd_card_get_index(const char *name)
Convert card string to an integer value.
Definition: cards.c:125
unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj)
Get event mask for an element related event.
Definition: control.c:1543
unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get index part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2187
char * snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
return ASCII CTL element identifier name
Definition: ctlparse.c:114
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:2306
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:1009
void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val)
Set numeric identifier for a CTL element identifier.
Definition: control.c:1765
int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx)
Get specified of dimension width for given element.
Definition: control.c:2548
int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, snd_async_callback_t callback, void *private_data)
Add an async handler for a CTL.
Definition: control.c:1212
unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj)
Get number of used entries in CTL element identifiers list.
Definition: control.c:2086
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:66
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[])
Create and add a user-defined control element of enumerated type.
Definition: control.c:796
snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj)
Get type of a CTL event.
Definition: control.c:2012
int snd_ctl_add_integer64_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long long min, long long max, long long step)
Create and add some user-defined control elements of integer64 type.
Definition: control.c:468
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:1969
void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size)
Set values to given data as an element of bytes type.
Definition: control.c:3124
void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val)
Set device part for a CTL element identifier.
Definition: control.c:1787
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:63
int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str)
parse ASCII string as CTL element identifier
Definition: ctlparse.c:264
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
Set device part of element identifier to given data of an element.
Definition: control.c:2939
int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj)
Get info about writability from a CTL element id/info.
Definition: control.c:2273
void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val)
Set interface part for a CTL element identifier.
Definition: control.c:1776
int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr)
Allocate an invalid snd_ctl_elem_value_t using standard malloc(3).
Definition: control.c:2770
int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long db_gain, long *value, int xdir)
Convert from dB gain to the raw volume value on the given control element.
Definition: tlv.c:492
unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj)
Get device part of CTL element identifier of a CTL element id/info.
Definition: control.c:2640
int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Process structured data from given buffer for an element set.
Definition: control.c:995
int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj)
Get info if it's a user element.
Definition: control.c:2328
long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj)
Get value step from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2466
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1492
int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj)
Get info about status from a CTL element id/info.
Definition: control.c:2295
const char * snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj)
Get name part of CTL element identifier of a CTL element id/info.
Definition: control.c:2662
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1157
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
clear given snd_ctl_card_info_t object
Definition: control.c:1862
void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val)
Set index part of element identifier to given data of an element.
Definition: control.c:2972
void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val)
Select item in a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2490
const char * snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj)
Get card component list from a CTL card info.
Definition: control.c:1949
long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of integer64 type.
Definition: control.c:3013
void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val)
Set name part of CTL element identifier of a CTL element id/info.
Definition: control.c:2739
void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src)
copy one snd_ctl_elem_id_t to another
Definition: control.c:1688
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj)
Get element numeric identifier from given data of an element.
Definition: control.c:2838
const char * snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj)
Get card identifier from a CTL card info.
Definition: control.c:1894
unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj)
Get index part of CTL element identifier of a CTL element id/info.
Definition: control.c:2673
void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val)
Set interface part of CTL element identifier of a CTL element id/info.
Definition: control.c:2706
int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf)
Opens a CTL using local configuration.
Definition: control.c:1416
const char * snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj)
Get name part of CTL element identifier for an element related event.
Definition: control.c:1615
const char * snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj)
Get card name from a CTL card info.
Definition: control.c:1916
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:2230
void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/info.
Definition: control.c:2607
int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size, unsigned int **db_tlvp)
Parse TLV stream and retrieve dB information.
Definition: tlv.c:59
int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries)
allocate space for CTL element identifiers list
Definition: control.c:1515
int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr)
allocate an invalid snd_ctl_card_info_t using standard malloc
Definition: control.c:1840
int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr)
allocate an invalid snd_ctl_elem_info_t using standard malloc
Definition: control.c:2208
unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj)
Get numeric identifier from a CTL element identifier.
Definition: control.c:1699
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:203
unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj)
Get device part of a CTL element identifier.
Definition: control.c:1721
int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id)
Create and add a user-defined control element of IEC958 type.
Definition: control.c:839
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
Copy two data of elements.
Definition: control.c:2802
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:1959
int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int *tlv, unsigned int tlv_size)
Read structured data from an element set to given buffer.
Definition: control.c:933
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a CTL.
Definition: control.c:1394
unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of bytes type.
Definition: control.c:3041
const char * snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
Get name part of element identifier from given data of an element.
Definition: control.c:2884
const char * snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get name part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2174
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t
Definition: control.c:1830
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition: control.c:2792
long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj)
Get minimum value from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2442
unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj)
Get subdevice part of a CTL element identifier.
Definition: control.c:1732
struct _snd_ctl_card_info snd_ctl_card_info_t
Definition: control.h:54
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
frees a previously allocated snd_ctl_card_info_t
Definition: control.c:1853
int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax, long volume, long *db_gain)
Convert the given raw volume value to a dB gain.
Definition: tlv.c:201
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:1982
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition: control.c:870
void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val)
Set index part for a CTL element identifier.
Definition: control.c:1820
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:1242
snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj)
Get interface part of a CTL element identifier.
Definition: control.c:1710
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t
Definition: control.c:2022
void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src)
copy one snd_ctl_event_t to another
Definition: control.c:2001
long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj)
Get maximum value from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2418
int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long *min, long *max)
Get the dB min/max values on the given control element.
Definition: tlv.c:448
unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get CTL element numeric identifier for an entry of a CTL element identifiers list.
Definition: control.c:2122
int snd_card_next(int *card)
Try to determine the next card.
Definition: cards.c:98
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition: control.c:858
snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get interface part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2135
void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2109
int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj)
Get info about TLV command possibility from a CTL element id/info.
Definition: control.c:2361
void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src)
copy one snd_ctl_elem_info_t to another
Definition: control.c:2240
snd_ctl_event_type_t
Definition: control.h:110
const char * snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj)
Get name for selected item in a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2501
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:1991
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
Get index part of element identifier from given data of an element.
Definition: control.c:2895
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
Set name part of element identifier to given data of an element.
Definition: control.c:2961
int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj)
Get info about notification feasibility from a CTL element id/info.
Definition: control.c:2284
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:2317
int snd_ctl_wait(snd_ctl_t *ctl, int timeout)
Wait for a CTL to become ready (i.e. at least one event pending)
Definition: control.c:1169
long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj)
Get maximum value from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2454
void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj)
free previously allocated space for CTL element identifiers list
Definition: control.c:1531
unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get subdevice part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2161
void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val)
Set name part for a CTL element identifier.
Definition: control.c:1809
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
Get subdevice part of element identifier from given data of an element.
Definition: control.c:2873
void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an element related event.
Definition: control.c:1555
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:105
long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj)
Get value step from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2430
void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val)
Set device part of CTL element identifier of a CTL element id/info.
Definition: control.c:2717
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of integer type.
Definition: control.c:2999
void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
Get value from given data to given pointer as an element of IEC958 type.
Definition: control.c:3148
void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
Set value of a specified member to given data as an element of enumerated type.
Definition: control.c:3097
struct _snd_sctl snd_sctl_t
Definition: control.h:220
void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr)
Set CTL element identifier of a CTL element id/info.
Definition: control.c:2684
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
Set numeric identifier to given data of an element.
Definition: control.c:2917
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:2221
void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val)
Set subdevice part for a CTL element identifier.
Definition: control.c:1798
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t
Definition: control.c:2045
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:2384
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:60
struct _snd_ctl_event snd_ctl_event_t
Definition: control.h:69
const char * snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj)
Get name part of a CTL element identifier.
Definition: control.c:1743
snd_ctl_type_t
Definition: control.h:193
int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, unsigned int items, const char *const labels[])
Create and add some user-defined control elements of enumerated type.
Definition: control.c:619
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)
Create and add an user-defined control element of integer type.
Definition: control.c:733
void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value of a specified member to given data as an element of boolean type.
Definition: control.c:3055
int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr)
allocate an invalid snd_ctl_elem_id_t using standard malloc
Definition: control.c:1656
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj)
Get interface part of element identifier from given data of an element.
Definition: control.c:2850
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition: control.c:300
int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of boolean type.
Definition: control.c:2985
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
Set subdevice part of element identifier to given data of an element.
Definition: control.c:2950
unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj)
Get number of value entries from a CTL element id/info.
Definition: control.c:2395
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)
Create and add an user-defined control element of integer64 type.
Definition: control.c:754
unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj)
Get subdevice part of CTL element identifier for an element related event.
Definition: control.c:1603
int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Write structured data from given buffer to an element set.
Definition: control.c:970
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get card related information.
Definition: control.c:275
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
Frees a previously allocated data of an element.
Definition: control.c:2783
int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj)
Get info about TLV readability from a CTL element id/info.
Definition: control.c:2339
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: control.c:221
void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
Set element identifier to given data of an element.
Definition: control.c:2906
void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val)
Set subdevice part of CTL element identifier of a CTL element id/info.
Definition: control.c:2728
int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long volume, long *db_gain)
Convert the volume value to dB on the given control element.
Definition: tlv.c:469
int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: control.c:244
int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe)
Ask to be informed about events (poll, snd_async_add_ctl_handler, snd_ctl_read)
Definition: control.c:262
int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr)
allocate an invalid snd_ctl_elem_list_t using standard malloc
Definition: control.c:2032
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1481
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
Get a list of element identifiers.
Definition: control.c:287
void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src)
copy one snd_ctl_elem_list_t to another
Definition: control.c:2064
const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj)
Get memory block from given data as an element of bytes type.
Definition: control.c:3136
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj)
Get info about readability from a CTL element id/info.
Definition: control.c:2262
unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj)
Get number of items available from a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2478
void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value of a specified member to given data as an element of integer type.
Definition: control.c:3069
unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj)
Get element numeric identifier of a CTL element id/info.
Definition: control.c:2618
snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj)
Get interface part of CTL element identifier of a CTL element id/info.
Definition: control.c:2629
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
Get device part of element identifier from given data of an element.
Definition: control.c:2861
void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src)
copy one snd_ctl_card_info_t to another
Definition: control.c:1872
snd_ctl_elem_type_t
Definition: control.h:72
long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj)
Get minimum value from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2406
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition: control.c:884
void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val)
Set index part of CTL element identifier of a CTL element id/info.
Definition: control.c:2750
int snd_ctl_add_integer_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long min, long max, long step)
Create and add some user-defined control elements of integer type.
Definition: control.c:378
int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj)
Get info about TLV writeability from a CTL element id/info.
Definition: control.c:2350
int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax, long *min, long *max)
Get the dB min/max values.
Definition: tlv.c:129
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1678
const char * snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj)
Get card driver name from a CTL card info.
Definition: control.c:1905
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:173
int snd_device_name_free_hint(void **hints)
Free a list of device name hints.
Definition: namehint.c:658
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
Get element identifier from given data of an element.
Definition: control.c:2827
int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right)
Compare one data of an element to the other.
Definition: control.c:2815
int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count)
Create and add an user-defined control element of boolean type.
Definition: control.c:775
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:57
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition: control.c:204
void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val)
Set index of first wanted CTL element identifier in a CTL element identifiers list.
Definition: control.c:2075
int snd_device_name_hint(int card, const char *iface, void ***hints)
Get a set of device name hints.
Definition: namehint.c:555
unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj)
Get element numeric identifier for an element related event.
Definition: control.c:1567
unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/info.
Definition: control.c:2651
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:1143
unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj)
Get index part of CTL element identifier for an element related event.
Definition: control.c:1627
unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get device part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2148
char * snd_device_name_get_hint(const void *hint, const char *id)
Extract a value from a hint.
Definition: namehint.c:686
unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj)
Get index part of a CTL element identifier.
Definition: control.c:1754
snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj)
Get interface part of CTL element identifier for an element related event.
Definition: control.c:1579
const char * snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj)
Get card long name from a CTL card info.
Definition: control.c:1927
void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
Set value of a specified member to given data as an element of integer64 type.
Definition: control.c:3083
void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
Set value from given pointer to given data as an element of IEC958 type.
Definition: control.c:3160
int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info, const int dimension[4])
Set width to a specified dimension level of given element information.
Definition: control.c:2580
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1646
int snd_ctl_add_bytes_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of bytes type.
Definition: control.c:706
unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of enumerated type.
Definition: control.c:3027
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:132
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:1021
unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj)
Get device part of CTL element identifier for an element related event.
Definition: control.c:1591
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1503
const char * snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj)
Get card mixer name from a CTL card info.
Definition: control.c:1938
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:118
int snd_ctl_add_boolean_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of boolean type.
Definition: control.c:554
@ SND_CTL_ELEM_IFACE_CARD
Definition: control.h:93
@ SND_CTL_ELEM_IFACE_PCM
Definition: control.h:99
@ SND_CTL_ELEM_IFACE_SEQUENCER
Definition: control.h:105
@ SND_CTL_ELEM_IFACE_RAWMIDI
Definition: control.h:101
@ SND_CTL_ELEM_IFACE_HWDEP
Definition: control.h:95
@ SND_CTL_ELEM_IFACE_TIMER
Definition: control.h:103
@ SND_CTL_ELEM_IFACE_MIXER
Definition: control.h:97
@ SND_CTL_EVENT_ELEM
Definition: control.h:112
@ SND_CTL_TYPE_INET
Definition: control.h:199
@ SND_CTL_TYPE_EXT
Definition: control.h:201
@ SND_CTL_TYPE_HW
Definition: control.h:195
@ SND_CTL_TYPE_SHM
Definition: control.h:197
@ SND_CTL_ELEM_TYPE_INTEGER
Definition: control.h:78
@ SND_CTL_ELEM_TYPE_NONE
Definition: control.h:74
@ SND_CTL_ELEM_TYPE_INTEGER64
Definition: control.h:86
@ SND_CTL_ELEM_TYPE_IEC958
Definition: control.h:84
@ SND_CTL_ELEM_TYPE_BOOLEAN
Definition: control.h:76
@ SND_CTL_ELEM_TYPE_ENUMERATED
Definition: control.h:80
@ SND_CTL_ELEM_TYPE_BYTES
Definition: control.h:82
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:114
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:121
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition: hcontrol.c:779
snd_hctl_elem_t * snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id)
Search an HCTL element.
Definition: hcontrol.c:551
snd_hctl_elem_t * snd_hctl_last_elem(snd_hctl_t *hctl)
get last element for an HCTL
Definition: hcontrol.c:511
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
unsigned int snd_hctl_get_count(snd_hctl_t *hctl)
Get number of loaded elements for an HCTL.
Definition: hcontrol.c:662
void * snd_hctl_get_callback_private(snd_hctl_t *hctl)
Get callback private value for an HCTL.
Definition: hcontrol.c:651
struct _snd_hctl snd_hctl_t
Definition: control.h:523
int snd_hctl_free(snd_hctl_t *hctl)
free HCTL loaded elements
Definition: hcontrol.c:402
int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode)
Opens an HCTL.
Definition: hcontrol.c:70
int snd_hctl_wait(snd_hctl_t *hctl, int timeout)
Wait for a HCTL to become ready (i.e. at least one event pending)
Definition: hcontrol.c:675
int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl)
get count of poll descriptors for HCTL handle
Definition: hcontrol.c:168
int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock)
set nonblock mode
Definition: hcontrol.c:142
int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size)
Get TLV value for an HCTL element.
Definition: hcontrol.c:853
int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl)
Opens an HCTL.
Definition: hcontrol.c:89
snd_hctl_t * snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem)
Get HCTL handle for an HCTL element.
Definition: hcontrol.c:898
int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort)
Change HCTL compare function and reorder elements.
Definition: hcontrol.c:448
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:542
int(* snd_hctl_compare_t)(const snd_hctl_elem_t *e1, const snd_hctl_elem_t *e2)
Compare function for sorting HCTL elements.
Definition: control.h:531
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:551
int snd_hctl_load(snd_hctl_t *hctl)
Load an HCTL with all elements and sort them.
Definition: hcontrol.c:565
int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: hcontrol.c:195
int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: hcontrol.c:181
int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Get value for an HCTL element.
Definition: hcontrol.c:820
unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:953
snd_hctl_elem_t * snd_hctl_elem_next(snd_hctl_elem_t *elem)
get next HCTL element
Definition: hcontrol.c:524
snd_ctl_t * snd_hctl_ctl(snd_hctl_t *hctl)
Get a ctl handle associated to the given hctl handle.
Definition: hcontrol.c:724
const char * snd_hctl_elem_get_name(const snd_hctl_elem_t *obj)
Get name part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:964
void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback)
Set callback function for an HCTL.
Definition: hcontrol.c:629
unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj)
Get index part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:975
void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void *val)
Set callback private value for an HCTL element.
Definition: hcontrol.c:997
int snd_hctl_compare_fast(const snd_hctl_elem_t *c1, const snd_hctl_elem_t *c2)
A "don't care" fast compare functions that may be used with snd_hctl_set_compare.
Definition: hcontrol.c:462
void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj)
Get callback private value for an HCTL element.
Definition: hcontrol.c:1008
int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition: hcontrol.c:869
snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj)
Get interface part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:931
void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:909
snd_hctl_elem_t * snd_hctl_elem_prev(snd_hctl_elem_t *elem)
get previous HCTL element
Definition: hcontrol.c:537
void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val)
Set callback function for an HCTL element.
Definition: hcontrol.c:986
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:520
int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t *info)
Get information for an HCTL element.
Definition: hcontrol.c:805
unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj)
Get element numeric identifier of a CTL element id/value.
Definition: hcontrol.c:920
void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data)
Set callback private value for an HCTL.
Definition: hcontrol.c:640
unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj)
Get device part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:942
int snd_hctl_close(snd_hctl_t *hctl)
close HCTL handle
Definition: hcontrol.c:111
int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition: hcontrol.c:885
snd_hctl_elem_t * snd_hctl_first_elem(snd_hctl_t *hctl)
get first element for an HCTL
Definition: hcontrol.c:498
int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Set value for an HCTL element.
Definition: hcontrol.c:837
struct _snd_hwdep_info snd_hwdep_info_t
Definition: hwdep.h:45
struct _snd_pcm_info snd_pcm_info_t
Definition: pcm.h:48
struct _snd_rawmidi_info snd_rawmidi_info_t
Definition: rawmidi.h:45
int snd_sctl_remove(snd_sctl_t *handle)
Remove (restore) previous values from control elements.
Definition: setup.c:181
int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config, snd_config_t *private_data, int mode)
Build setup control handle.
Definition: setup.c:603
int snd_sctl_install(snd_sctl_t *handle)
Install given values to control elements.
Definition: setup.c:83
int snd_sctl_free(snd_sctl_t *handle)
Free setup control handle.
Definition: setup.c:644
void * ptr
Definition: seq_event.h:1
Definition: control.h:46
unsigned char pad
Definition: control.h:49