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- /**
- * \file include/control.h
- * \brief Application interface library for the ALSA driver
- * \author Jaroslav Kysela <perex@suse.cz>
- * \author Abramo Bagnara <abramo@alsa-project.org>
- * \author Takashi Iwai <tiwai@suse.de>
- * \date 1998-2001
- *
- * Application interface library for the ALSA driver
- */
- /*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation; either version 2.1 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
- #ifndef __ALSA_CONTROL_H
- #define __ALSA_CONTROL_H
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /**
- * \defgroup Control Control Interface
- * The control interface.
- * See \ref control page for more details.
- * \{
- */
-
- /** dlsym version for interface entry callback */
- #define SND_CONTROL_DLSYM_VERSION _dlsym_control_001
-
- /** IEC958 structure */
- typedef struct snd_aes_iec958 {
- unsigned char status[24]; /**< AES/IEC958 channel status bits */
- unsigned char subcode[147]; /**< AES/IEC958 subcode bits */
- unsigned char pad; /**< nothing */
- unsigned char dig_subframe[4]; /**< AES/IEC958 subframe bits */
- } snd_aes_iec958_t;
-
- /** CTL card info container */
- typedef struct _snd_ctl_card_info snd_ctl_card_info_t;
-
- /** CTL element identifier container */
- typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;
-
- /** CTL element identifier list container */
- typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
-
- /** CTL element info container */
- typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
-
- /** CTL element value container */
- typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
-
- /** CTL event container */
- typedef struct _snd_ctl_event snd_ctl_event_t;
-
- /** CTL element type */
- typedef enum _snd_ctl_elem_type {
- /** Invalid type */
- SND_CTL_ELEM_TYPE_NONE = 0,
- /** Boolean contents */
- SND_CTL_ELEM_TYPE_BOOLEAN,
- /** Integer contents */
- SND_CTL_ELEM_TYPE_INTEGER,
- /** Enumerated contents */
- SND_CTL_ELEM_TYPE_ENUMERATED,
- /** Bytes contents */
- SND_CTL_ELEM_TYPE_BYTES,
- /** IEC958 (S/PDIF) setting content */
- SND_CTL_ELEM_TYPE_IEC958,
- /** 64-bit integer contents */
- SND_CTL_ELEM_TYPE_INTEGER64,
- SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
- } snd_ctl_elem_type_t;
-
- /** CTL related interface */
- typedef enum _snd_ctl_elem_iface {
- /** Card level */
- SND_CTL_ELEM_IFACE_CARD = 0,
- /** Hardware dependent device */
- SND_CTL_ELEM_IFACE_HWDEP,
- /** Mixer */
- SND_CTL_ELEM_IFACE_MIXER,
- /** PCM */
- SND_CTL_ELEM_IFACE_PCM,
- /** RawMidi */
- SND_CTL_ELEM_IFACE_RAWMIDI,
- /** Timer */
- SND_CTL_ELEM_IFACE_TIMER,
- /** Sequencer */
- SND_CTL_ELEM_IFACE_SEQUENCER,
- SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
- } snd_ctl_elem_iface_t;
-
- /** Event class */
- typedef enum _snd_ctl_event_type {
- /** Elements related event */
- SND_CTL_EVENT_ELEM = 0,
- SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
- }snd_ctl_event_type_t;
-
- /** Element has been removed (Warning: test this first and if set don't
- * test the other masks) \hideinitializer */
- #define SND_CTL_EVENT_MASK_REMOVE (~0U)
- /** Element value has been changed \hideinitializer */
- #define SND_CTL_EVENT_MASK_VALUE (1<<0)
- /** Element info has been changed \hideinitializer */
- #define SND_CTL_EVENT_MASK_INFO (1<<1)
- /** Element has been added \hideinitializer */
- #define SND_CTL_EVENT_MASK_ADD (1<<2)
-
- /** CTL name helper */
- #define SND_CTL_NAME_NONE ""
- /** CTL name helper */
- #define SND_CTL_NAME_PLAYBACK "Playback "
- /** CTL name helper */
- #define SND_CTL_NAME_CAPTURE "Capture "
-
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_NONE ""
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_SWITCH "Switch"
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_VOLUME "Volume"
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_DEFAULT "Default"
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_MASK "Mask"
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
- /** CTL name helper */
- #define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
- /** Element name for IEC958 (S/PDIF) */
- #define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
-
- /** Mask for the major Power State identifier */
- #define SND_CTL_POWER_MASK 0xff00
- /** ACPI/PCI Power State D0 */
- #define SND_CTL_POWER_D0 0x0000
- /** ACPI/PCI Power State D1 */
- #define SND_CTL_POWER_D1 0x0100
- /** ACPI/PCI Power State D2 */
- #define SND_CTL_POWER_D2 0x0200
- /** ACPI/PCI Power State D3 */
- #define SND_CTL_POWER_D3 0x0300
- /** ACPI/PCI Power State D3hot */
- #define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
- /** ACPI/PCI Power State D3cold */
- #define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
-
- /** CTL type */
- typedef enum _snd_ctl_type {
- /** Kernel level CTL */
- SND_CTL_TYPE_HW,
- /** Shared memory client CTL */
- SND_CTL_TYPE_SHM,
- /** INET client CTL (not yet implemented) */
- SND_CTL_TYPE_INET,
- /** External control plugin */
- SND_CTL_TYPE_EXT
- } snd_ctl_type_t;
-
- /** Non blocking mode (flag for open mode) \hideinitializer */
- #define SND_CTL_NONBLOCK 0x0001
-
- /** Async notification (flag for open mode) \hideinitializer */
- #define SND_CTL_ASYNC 0x0002
-
- /** Read only (flag for open mode) \hideinitializer */
- #define SND_CTL_READONLY 0x0004
-
- /** CTL handle */
- typedef struct _snd_ctl snd_ctl_t;
-
- /** Don't destroy the ctl handle when close */
- #define SND_SCTL_NOFREE 0x0001
-
- /** SCTL type */
- typedef struct _snd_sctl snd_sctl_t;
-
- int snd_card_load(int card);
- int snd_card_next(int *card);
- int snd_card_get_index(const char *name);
- int snd_card_get_name(int card, char **name);
- int snd_card_get_longname(int card, char **name);
-
- int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
- int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
- int snd_ctl_close(snd_ctl_t *ctl);
- int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
- int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl,
- snd_async_callback_t callback, void *private_data);
- snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler);
- int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl);
- int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
- int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
- int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
- int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info);
- int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t * list);
- int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
- int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
- int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *value);
- int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
- int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
- int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
- int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info);
- int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
- int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
- int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
- int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
- int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info);
- int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
- int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
- int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
-
- int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
- int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
- const char *snd_ctl_name(snd_ctl_t *ctl);
- snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
-
- const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
- const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
- const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
-
- unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
- unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
- void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr);
- snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj);
- unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
- unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
- const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
- unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
-
- int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
- void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj);
-
- size_t snd_ctl_elem_id_sizeof(void);
- /** \hideinitializer
- * \brief allocate an invalid #snd_ctl_elem_id_t using standard alloca
- * \param ptr returned pointer
- */
- #define snd_ctl_elem_id_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_id_t *) alloca(snd_ctl_elem_id_sizeof()); memset(*ptr, 0, snd_ctl_elem_id_sizeof()); } while (0)
- int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr);
- void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj);
- void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj);
- void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src);
- unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
- snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj);
- unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
- unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
- const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
- unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
- void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
- void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val);
- void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
- void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
- void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
- void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
-
- size_t snd_ctl_card_info_sizeof(void);
- /** \hideinitializer
- * \brief allocate an invalid #snd_ctl_card_info_t using standard alloca
- * \param ptr returned pointer
- */
- #define snd_ctl_card_info_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_card_info_t *) alloca(snd_ctl_card_info_sizeof()); memset(*ptr, 0, snd_ctl_card_info_sizeof()); } while (0)
- int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr);
- void snd_ctl_card_info_free(snd_ctl_card_info_t *obj);
- void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj);
- void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src);
- int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj);
- const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
- const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
- const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
- const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj);
- const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj);
- const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj);
-
- size_t snd_ctl_event_sizeof(void);
- /** \hideinitializer
- * \brief allocate an invalid #snd_ctl_event_t using standard alloca
- * \param ptr returned pointer
- */
- #define snd_ctl_event_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_event_t *) alloca(snd_ctl_event_sizeof()); memset(*ptr, 0, snd_ctl_event_sizeof()); } while (0)
- int snd_ctl_event_malloc(snd_ctl_event_t **ptr);
- void snd_ctl_event_free(snd_ctl_event_t *obj);
- void snd_ctl_event_clear(snd_ctl_event_t *obj);
- void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
- snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);
-
- size_t snd_ctl_elem_list_sizeof(void);
- /** \hideinitializer
- * \brief allocate an invalid #snd_ctl_elem_list_t using standard alloca
- * \param ptr returned pointer
- */
- #define snd_ctl_elem_list_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_list_t *) alloca(snd_ctl_elem_list_sizeof()); memset(*ptr, 0, snd_ctl_elem_list_sizeof()); } while (0)
- int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr);
- void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj);
- void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj);
- void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src);
- void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
- unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
- unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
- void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
- unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
- snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx);
- unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
- unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
- const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
- unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
-
- size_t snd_ctl_elem_info_sizeof(void);
- /** \hideinitializer
- * \brief allocate an invalid #snd_ctl_elem_info_t using standard alloca
- * \param ptr returned pointer
- */
- #define snd_ctl_elem_info_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_info_t *) alloca(snd_ctl_elem_info_sizeof()); memset(*ptr, 0, snd_ctl_elem_info_sizeof()); } while (0)
- int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr);
- void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj);
- void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj);
- void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src);
- snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj);
- pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj);
- unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
- long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj);
- long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj);
- long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj);
- long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj);
- long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj);
- long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj);
- unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
- void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
- const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj);
- int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
- void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr);
- unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
- snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);
- unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
- unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj);
- const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
- unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
- void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr);
- void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
- void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);
- void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
- void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
- void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
- void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
-
- 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);
- 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);
- int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
- int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id);
- int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
-
- size_t snd_ctl_elem_value_sizeof(void);
- /** \hideinitializer
- * \brief allocate an invalid #snd_ctl_elem_value_t using standard alloca
- * \param ptr returned pointer
- */
- #define snd_ctl_elem_value_alloca(ptr) do { assert(ptr); *ptr = (snd_ctl_elem_value_t *) alloca(snd_ctl_elem_value_sizeof()); memset(*ptr, 0, snd_ctl_elem_value_sizeof()); } while (0)
- int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);
- void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);
- void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);
- void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);
- void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);
- unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
- snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);
- unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
- unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj);
- const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
- unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
- void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr);
- void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
- void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);
- void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
- void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
- void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
- void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
- int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
- long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
- long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
- unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
- unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
- void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
- void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
- void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
- void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
- void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
- void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
- const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
- void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);
- void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);
-
- /**
- * \defgroup HControl High level Control Interface
- * \ingroup Control
- * The high level control interface.
- * See \ref hcontrol page for more details.
- * \{
- */
-
- /** HCTL element handle */
- typedef struct _snd_hctl_elem snd_hctl_elem_t;
-
- /** HCTL handle */
- typedef struct _snd_hctl snd_hctl_t;
-
- /**
- * \brief Compare function for sorting HCTL elements
- * \param e1 First element
- * \param e2 Second element
- * \return -1 if e1 < e2, 0 if e1 == e2, 1 if e1 > e2
- */
- typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
- const snd_hctl_elem_t *e2);
- int snd_hctl_compare_fast(const snd_hctl_elem_t *c1,
- const snd_hctl_elem_t *c2);
- /**
- * \brief HCTL callback function
- * \param hctl HCTL handle
- * \param mask event mask
- * \param elem related HCTL element (if any)
- * \return 0 on success otherwise a negative error code
- */
- typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
- unsigned int mask,
- snd_hctl_elem_t *elem);
- /**
- * \brief HCTL element callback function
- * \param elem HCTL element
- * \param mask event mask
- * \return 0 on success otherwise a negative error code
- */
- typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem,
- unsigned int mask);
-
- int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
- int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
- int snd_hctl_close(snd_hctl_t *hctl);
- int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
- int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl);
- int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
- int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
- unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
- int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort);
- snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl);
- snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl);
- snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id);
- void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback);
- void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
- void *snd_hctl_get_callback_private(snd_hctl_t *hctl);
- int snd_hctl_load(snd_hctl_t *hctl);
- int snd_hctl_free(snd_hctl_t *hctl);
- int snd_hctl_handle_events(snd_hctl_t *hctl);
- const char *snd_hctl_name(snd_hctl_t *hctl);
- int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
- snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl);
-
- snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem);
- snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem);
- int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info);
- int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
- int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
-
- snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem);
-
- void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr);
- unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
- snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);
- unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
- unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
- const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
- unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
- void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val);
- void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj);
- void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val);
-
- /** \} */
-
- /** \} */
-
- /**
- * \defgroup SControl Setup Control Interface
- * \ingroup Control
- * The setup control interface - set or modify control elements from a configuration file.
- * \{
- */
-
- int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
- snd_config_t *private_data, int mode);
- int snd_sctl_free(snd_sctl_t *handle);
- int snd_sctl_install(snd_sctl_t *handle);
- int snd_sctl_remove(snd_sctl_t *handle);
-
- /** \} */
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* __ALSA_CONTROL_H */
-