28 #ifndef __ALSA_CONTROL_H
29 #define __ALSA_CONTROL_H
43 #define SND_CONTROL_DLSYM_VERSION _dlsym_control_001
46 typedef struct snd_aes_iec958 {
47 unsigned char status[24];
48 unsigned char subcode[147];
50 unsigned char dig_subframe[4];
72 typedef enum _snd_ctl_elem_type {
91 typedef enum _snd_ctl_elem_iface {
110 typedef enum _snd_ctl_event_type {
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)
129 #define SND_CTL_NAME_NONE ""
131 #define SND_CTL_NAME_PLAYBACK "Playback "
133 #define SND_CTL_NAME_CAPTURE "Capture "
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
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)
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
183 #define SND_CTL_TLV_DB_GAIN_MUTE -9999999
186 #define SND_CTL_TLVT_CHMAP_FIXED 0x00101
188 #define SND_CTL_TLVT_CHMAP_VAR 0x00102
190 #define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
193 typedef enum _snd_ctl_type {
205 #define SND_CTL_NONBLOCK 0x0001
208 #define SND_CTL_ASYNC 0x0002
211 #define SND_CTL_READONLY 0x0004
217 #define SND_SCTL_NOFREE 0x0001
253 unsigned int *tlv,
unsigned int tlv_size);
255 const unsigned int *tlv);
257 const unsigned int *tlv);
258 #ifdef __ALSA_HWDEP_H
267 #ifdef __ALSA_RAWMIDI_H
308 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
331 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
349 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
361 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
382 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
412 const int dimension[4]);
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,
438 unsigned int element_count,
439 unsigned int member_count);
441 unsigned int element_count,
442 unsigned int member_count,
444 const char *
const labels[]);
446 unsigned int element_count,
447 unsigned int member_count);
461 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
497 unsigned int **db_tlvp);
499 long *min,
long *max);
501 long volume,
long *db_gain);
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);
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
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:2568
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:1029
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:3011
Definition: control.h:201
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1488
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:1955
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:2438
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t
Definition: control.c:2018
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
void * snd_hctl_get_callback_private(snd_hctl_t *hctl)
Get callback private value for an HCTL.
Definition: hcontrol.c:651
snd_ctl_elem_type_t
Definition: control.h:72
struct _snd_ctl_card_info snd_ctl_card_info_t
Definition: control.h:54
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:374
int snd_card_next(int *card)
Try to determine the next card.
Definition: cards.c:98
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
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:2799
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:2474
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:2602
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:1101
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
Definition: control.h:105
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:2668
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:1868
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:550
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:1053
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:2540
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:2879
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:2346
int snd_hctl_free(snd_hctl_t *hctl)
free HCTL loaded elements
Definition: hcontrol.c:402
void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data)
Set callback private value for an HCTL.
Definition: hcontrol.c:640
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:2258
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:2624
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:2247
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:2093
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:121
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
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:2857
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:551
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
Definition: control.h:199
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:2497
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:1563
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:1761
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:2380
struct _snd_rawmidi_info snd_rawmidi_info_t
Definition: rawmidi.h:45
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:2956
Definition: control.h:112
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
struct _snd_pcm_info snd_pcm_info_t
Definition: pcm.h:48
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
Frees a previously allocated data of an element.
Definition: control.c:2767
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:2302
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:3039
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:1997
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:1728
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:2414
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:3144
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:1965
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:3120
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: control.c:221
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:2983
int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock)
set nonblock mode
Definition: hcontrol.c:142
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
struct _snd_ctl snd_ctl_t
Definition: control.h:214
void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback)
Set callback function for an HCTL.
Definition: hcontrol.c:629
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:966
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:2901
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1674
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:2834
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:2845
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:2226
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:2008
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:66
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:2402
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:542
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:1611
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:1017
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:152
snd_ctl_elem_iface_t
Definition: control.h:91
unsigned int snd_hctl_get_count(snd_hctl_t *hctl)
Get number of loaded elements for an HCTL.
Definition: hcontrol.c:662
snd_hctl_elem_t * snd_hctl_last_elem(snd_hctl_t *hctl)
get last element for an HCTL
Definition: hcontrol.c:511
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:2613
Definition: control.h:103
snd_ctl_type_t
Definition: control.h:193
int snd_device_name_hint(int card, const char *iface, void ***hints)
Get a set of device name hints.
Definition: namehint.c:548
int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl)
Opens an HCTL.
Definition: hcontrol.c:89
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:771
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get card related information.
Definition: control.c:275
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:2144
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:1575
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:1934
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:2118
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:1717
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:1684
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:2486
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:991
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a CTL.
Definition: control.c:1390
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:2734
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:1005
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:2082
int snd_hctl_load(snd_hctl_t *hctl)
Load an HCTL with all elements and sort them.
Definition: hcontrol.c:565
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:1551
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:1706
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:1539
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
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
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
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:2426
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:1816
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:2811
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:464
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:1077
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
frees a previously allocated snd_ctl_card_info_t
Definition: control.c:1849
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:2170
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:2313
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:60
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:57
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
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:615
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:3095
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:2945
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2515
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1499
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition: control.c:2776
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
struct _snd_hwdep_info snd_hwdep_info_t
Definition: hwdep.h:45
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_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:2357
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:1794
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:2934
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_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1153
int snd_device_name_free_hint(void **hints)
Free a list of device name hints.
Definition: namehint.c:651
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
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:2591
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_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort)
Change HCTL compare function and reorder elements.
Definition: hcontrol.c:448
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
clear given snd_ctl_card_info_t object
Definition: control.c:1858
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:1805
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_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:2060
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:2462
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_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:2701
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:1623
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:2679
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:1065
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:1879
int snd_hctl_close(snd_hctl_t *hctl)
close HCTL handle
Definition: hcontrol.c:111
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:2071
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:1987
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
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
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition: control.c:300
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:1238
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:173
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition: control.c:854
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:2744
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:1165
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:2450
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
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:2635
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:1041
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:2969
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:1836
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
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:132
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_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
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_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
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t
Definition: control.c:1826
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:2280
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:835
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:1527
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:2646
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:1945
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:3053
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:2912
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:1695
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:1739
int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl)
get count of poll descriptors for HCTL handle
Definition: hcontrol.c:168
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_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
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
Definition: control.h:195
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t
Definition: control.c:2041
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:2712
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
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:1923
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:2204
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:1089
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:63
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:2786
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:2890
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:114
int snd_sctl_remove(snd_sctl_t *handle)
Remove (restore) previous values from control elements.
Definition: setup.c:181
int snd_sctl_free(snd_sctl_t *handle)
Free setup control handle.
Definition: setup.c:644
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:2028
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:2335
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:2754
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:702
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:2131
snd_hctl_elem_t * snd_hctl_first_elem(snd_hctl_t *hctl)
get first element for an HCTL
Definition: hcontrol.c:498
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:2269
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
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:2822
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2194
int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode)
Opens an HCTL.
Definition: hcontrol.c:70
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
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:3108
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:1750
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:1208
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:1139
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition: hcontrol.c:779
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:2868
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:1428
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:1113
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:1125
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
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:2105
snd_hctl_t * snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem)
Get HCTL handle for an HCTL element.
Definition: hcontrol.c:898
struct _snd_ctl_event snd_ctl_event_t
Definition: control.h:69
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_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:2291
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:1599
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:105
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:1978
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition: control.c:866
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:1587
struct _snd_hctl snd_hctl_t
Definition: control.h:523
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:729
int snd_card_get_index(const char *name)
Convert card string to an integer value.
Definition: cards.c:125
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:1912
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:520
Definition: control.h:197
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:2157
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:3067
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:2183
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:1772
snd_hctl_elem_t * snd_hctl_elem_next(snd_hctl_elem_t *elem)
get next HCTL element
Definition: hcontrol.c:524
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:750
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:792
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:2723
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:2391
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:118
int snd_sctl_install(snd_sctl_t *handle)
Install given values to control elements.
Definition: setup.c:83
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:1511
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:2657
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1477
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:1652
snd_ctl_event_type_t
Definition: control.h:110
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:1412
snd_hctl_elem_t * snd_hctl_elem_prev(snd_hctl_elem_t *elem)
get previous HCTL element
Definition: hcontrol.c:537
snd_ctl_t * snd_hctl_ctl(snd_hctl_t *hctl)
Get a ctl handle associated to the given hctl handle.
Definition: hcontrol.c:724
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:1783
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:1901
struct _snd_sctl snd_sctl_t
Definition: control.h:220
void * ptr
Definition: seq_event.h:199
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:203
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
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
clear given snd_ctl_elem_list_t object
Definition: control.c:2050
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:309
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:2690
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:2923
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:1890
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:2997
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition: control.c:880
Definition: control.h:101
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_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:3081
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:2236
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:3025
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1642
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:2217
char * snd_device_name_get_hint(const void *hint, const char *id)
Extract a value from a hint.
Definition: namehint.c:679
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:3132
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:929
unsigned char pad
Definition: control.h:49
int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: hcontrol.c:181
void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj)
frees a previously allocated snd_ctl_elem_id_t
Definition: control.c:1665
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:2324