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Diffstat (limited to 'sysroot/usr/include/alsa/mixer.h')
| -rw-r--r-- | sysroot/usr/include/alsa/mixer.h | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/sysroot/usr/include/alsa/mixer.h b/sysroot/usr/include/alsa/mixer.h new file mode 100644 index 0000000..4129778 --- /dev/null +++ b/sysroot/usr/include/alsa/mixer.h @@ -0,0 +1,315 @@ +/** + * \file include/mixer.h + * \brief Application interface library for the ALSA driver + * \author Jaroslav Kysela <perex@perex.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_MIXER_H +#define __ALSA_MIXER_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \defgroup Mixer Mixer Interface + * The mixer interface. + * \{ + */ + +/** Mixer handle */ +typedef struct _snd_mixer snd_mixer_t; +/** Mixer elements class handle */ +typedef struct _snd_mixer_class snd_mixer_class_t; +/** Mixer element handle */ +typedef struct _snd_mixer_elem snd_mixer_elem_t; + +/** + * \brief Mixer callback function + * \param mixer Mixer handle + * \param mask event mask + * \param elem related mixer element (if any) + * \return 0 on success otherwise a negative error code + */ +typedef int (*snd_mixer_callback_t)(snd_mixer_t *ctl, + unsigned int mask, + snd_mixer_elem_t *elem); + +/** + * \brief Mixer element callback function + * \param elem Mixer element + * \param mask event mask + * \return 0 on success otherwise a negative error code + */ +typedef int (*snd_mixer_elem_callback_t)(snd_mixer_elem_t *elem, + unsigned int mask); + +/** + * \brief Compare function for sorting mixer 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_mixer_compare_t)(const snd_mixer_elem_t *e1, + const snd_mixer_elem_t *e2); + +/** + * \brief Event callback for the mixer class + * \param class_ Mixer class + * \param mask Event mask (SND_CTL_EVENT_*) + * \param helem HCTL element which invoked the event + * \param melem Mixer element associated to HCTL element + * \return zero if success, otherwise a negative error value + */ +typedef int (*snd_mixer_event_t)(snd_mixer_class_t *class_, unsigned int mask, + snd_hctl_elem_t *helem, snd_mixer_elem_t *melem); + + +/** Mixer element type */ +typedef enum _snd_mixer_elem_type { + /* Simple (legacy) mixer elements */ + SND_MIXER_ELEM_SIMPLE, + SND_MIXER_ELEM_LAST = SND_MIXER_ELEM_SIMPLE +} snd_mixer_elem_type_t; + +int snd_mixer_open(snd_mixer_t **mixer, int mode); +int snd_mixer_close(snd_mixer_t *mixer); +snd_mixer_elem_t *snd_mixer_first_elem(snd_mixer_t *mixer); +snd_mixer_elem_t *snd_mixer_last_elem(snd_mixer_t *mixer); +int snd_mixer_handle_events(snd_mixer_t *mixer); +int snd_mixer_attach(snd_mixer_t *mixer, const char *name); +int snd_mixer_attach_hctl(snd_mixer_t *mixer, snd_hctl_t *hctl); +int snd_mixer_detach(snd_mixer_t *mixer, const char *name); +int snd_mixer_detach_hctl(snd_mixer_t *mixer, snd_hctl_t *hctl); +int snd_mixer_get_hctl(snd_mixer_t *mixer, const char *name, snd_hctl_t **hctl); +int snd_mixer_poll_descriptors_count(snd_mixer_t *mixer); +int snd_mixer_poll_descriptors(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int space); +int snd_mixer_poll_descriptors_revents(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents); +int snd_mixer_load(snd_mixer_t *mixer); +void snd_mixer_free(snd_mixer_t *mixer); +int snd_mixer_wait(snd_mixer_t *mixer, int timeout); +int snd_mixer_set_compare(snd_mixer_t *mixer, snd_mixer_compare_t msort); +void snd_mixer_set_callback(snd_mixer_t *obj, snd_mixer_callback_t val); +void * snd_mixer_get_callback_private(const snd_mixer_t *obj); +void snd_mixer_set_callback_private(snd_mixer_t *obj, void * val); +unsigned int snd_mixer_get_count(const snd_mixer_t *obj); +int snd_mixer_class_unregister(snd_mixer_class_t *clss); + +snd_mixer_elem_t *snd_mixer_elem_next(snd_mixer_elem_t *elem); +snd_mixer_elem_t *snd_mixer_elem_prev(snd_mixer_elem_t *elem); +void snd_mixer_elem_set_callback(snd_mixer_elem_t *obj, snd_mixer_elem_callback_t val); +void * snd_mixer_elem_get_callback_private(const snd_mixer_elem_t *obj); +void snd_mixer_elem_set_callback_private(snd_mixer_elem_t *obj, void * val); +snd_mixer_elem_type_t snd_mixer_elem_get_type(const snd_mixer_elem_t *obj); + +int snd_mixer_class_register(snd_mixer_class_t *class_, snd_mixer_t *mixer); +int snd_mixer_add_elem(snd_mixer_t *mixer, snd_mixer_elem_t *elem); +int snd_mixer_remove_elem(snd_mixer_t *mixer, snd_mixer_elem_t *elem); +int snd_mixer_elem_new(snd_mixer_elem_t **elem, + snd_mixer_elem_type_t type, + int compare_weight, + void *private_data, + void (*private_free)(snd_mixer_elem_t *elem)); +int snd_mixer_elem_add(snd_mixer_elem_t *elem, snd_mixer_class_t *class_); +int snd_mixer_elem_remove(snd_mixer_elem_t *elem); +void snd_mixer_elem_free(snd_mixer_elem_t *elem); +int snd_mixer_elem_info(snd_mixer_elem_t *elem); +int snd_mixer_elem_value(snd_mixer_elem_t *elem); +int snd_mixer_elem_attach(snd_mixer_elem_t *melem, snd_hctl_elem_t *helem); +int snd_mixer_elem_detach(snd_mixer_elem_t *melem, snd_hctl_elem_t *helem); +int snd_mixer_elem_empty(snd_mixer_elem_t *melem); +void *snd_mixer_elem_get_private(const snd_mixer_elem_t *melem); + +size_t snd_mixer_class_sizeof(void); +/** \hideinitializer + * \brief allocate an invalid #snd_mixer_class_t using standard alloca + * \param ptr returned pointer + */ +#define snd_mixer_class_alloca(ptr) do { assert(ptr); *ptr = (snd_mixer_class_t *) alloca(snd_mixer_class_sizeof()); memset(*ptr, 0, snd_mixer_class_sizeof()); } while (0) +int snd_mixer_class_malloc(snd_mixer_class_t **ptr); +void snd_mixer_class_free(snd_mixer_class_t *obj); +void snd_mixer_class_copy(snd_mixer_class_t *dst, const snd_mixer_class_t *src); +snd_mixer_t *snd_mixer_class_get_mixer(const snd_mixer_class_t *class_); +snd_mixer_event_t snd_mixer_class_get_event(const snd_mixer_class_t *class_); +void *snd_mixer_class_get_private(const snd_mixer_class_t *class_); +snd_mixer_compare_t snd_mixer_class_get_compare(const snd_mixer_class_t *class_); +int snd_mixer_class_set_event(snd_mixer_class_t *class_, snd_mixer_event_t event); +int snd_mixer_class_set_private(snd_mixer_class_t *class_, void *private_data); +int snd_mixer_class_set_private_free(snd_mixer_class_t *class_, void (*private_free)(snd_mixer_class_t *class_)); +int snd_mixer_class_set_compare(snd_mixer_class_t *class_, snd_mixer_compare_t compare); + +/** + * \defgroup SimpleMixer Simple Mixer Interface + * \ingroup Mixer + * The simple mixer interface. + * \{ + */ + +/* Simple (legacy) mixer elements API */ + +/** Mixer simple element channel identifier */ +typedef enum _snd_mixer_selem_channel_id { + /** Unknown */ + SND_MIXER_SCHN_UNKNOWN = -1, + /** Front left */ + SND_MIXER_SCHN_FRONT_LEFT = 0, + /** Front right */ + SND_MIXER_SCHN_FRONT_RIGHT, + /** Rear left */ + SND_MIXER_SCHN_REAR_LEFT, + /** Rear right */ + SND_MIXER_SCHN_REAR_RIGHT, + /** Front center */ + SND_MIXER_SCHN_FRONT_CENTER, + /** Woofer */ + SND_MIXER_SCHN_WOOFER, + /** Side Left */ + SND_MIXER_SCHN_SIDE_LEFT, + /** Side Right */ + SND_MIXER_SCHN_SIDE_RIGHT, + /** Rear Center */ + SND_MIXER_SCHN_REAR_CENTER, + SND_MIXER_SCHN_LAST = 31, + /** Mono (Front left alias) */ + SND_MIXER_SCHN_MONO = SND_MIXER_SCHN_FRONT_LEFT +} snd_mixer_selem_channel_id_t; + +/** Mixer simple element - register options - abstraction level */ +enum snd_mixer_selem_regopt_abstract { + /** no abstraction - try use all universal controls from driver */ + SND_MIXER_SABSTRACT_NONE = 0, + /** basic abstraction - Master,PCM,CD,Aux,Record-Gain etc. */ + SND_MIXER_SABSTRACT_BASIC, +}; + +/** Mixer simple element - register options */ +struct snd_mixer_selem_regopt { + /** structure version */ + int ver; + /** v1: abstract layer selection */ + enum snd_mixer_selem_regopt_abstract abstract; + /** v1: device name (must be NULL when playback_pcm or capture_pcm != NULL) */ + const char *device; + /** v1: playback PCM connected to mixer device (NULL == none) */ + snd_pcm_t *playback_pcm; + /** v1: capture PCM connected to mixer device (NULL == none) */ + snd_pcm_t *capture_pcm; +}; + +/** Mixer simple element identifier */ +typedef struct _snd_mixer_selem_id snd_mixer_selem_id_t; + +const char *snd_mixer_selem_channel_name(snd_mixer_selem_channel_id_t channel); + +int snd_mixer_selem_register(snd_mixer_t *mixer, + struct snd_mixer_selem_regopt *options, + snd_mixer_class_t **classp); +void snd_mixer_selem_get_id(snd_mixer_elem_t *element, + snd_mixer_selem_id_t *id); +const char *snd_mixer_selem_get_name(snd_mixer_elem_t *elem); +unsigned int snd_mixer_selem_get_index(snd_mixer_elem_t *elem); +snd_mixer_elem_t *snd_mixer_find_selem(snd_mixer_t *mixer, + const snd_mixer_selem_id_t *id); + +int snd_mixer_selem_is_active(snd_mixer_elem_t *elem); +int snd_mixer_selem_is_playback_mono(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_playback_channel(snd_mixer_elem_t *obj, snd_mixer_selem_channel_id_t channel); +int snd_mixer_selem_is_capture_mono(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_capture_channel(snd_mixer_elem_t *obj, snd_mixer_selem_channel_id_t channel); +int snd_mixer_selem_get_capture_group(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_common_volume(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_playback_volume(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_playback_volume_joined(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_capture_volume(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_capture_volume_joined(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_common_switch(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_playback_switch(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_playback_switch_joined(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_capture_switch(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_capture_switch_joined(snd_mixer_elem_t *elem); +int snd_mixer_selem_has_capture_switch_exclusive(snd_mixer_elem_t *elem); + +int snd_mixer_selem_get_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value); +int snd_mixer_selem_get_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value); +int snd_mixer_selem_get_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value); +int snd_mixer_selem_get_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value); +int snd_mixer_selem_get_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value); +int snd_mixer_selem_get_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value); +int snd_mixer_selem_set_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value); +int snd_mixer_selem_set_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value); +int snd_mixer_selem_set_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir); +int snd_mixer_selem_set_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir); +int snd_mixer_selem_set_playback_volume_all(snd_mixer_elem_t *elem, long value); +int snd_mixer_selem_set_capture_volume_all(snd_mixer_elem_t *elem, long value); +int snd_mixer_selem_set_playback_dB_all(snd_mixer_elem_t *elem, long value, int dir); +int snd_mixer_selem_set_capture_dB_all(snd_mixer_elem_t *elem, long value, int dir); +int snd_mixer_selem_set_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value); +int snd_mixer_selem_set_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value); +int snd_mixer_selem_set_playback_switch_all(snd_mixer_elem_t *elem, int value); +int snd_mixer_selem_set_capture_switch_all(snd_mixer_elem_t *elem, int value); +int snd_mixer_selem_get_playback_volume_range(snd_mixer_elem_t *elem, + long *min, long *max); +int snd_mixer_selem_get_playback_dB_range(snd_mixer_elem_t *elem, + long *min, long *max); +int snd_mixer_selem_set_playback_volume_range(snd_mixer_elem_t *elem, + long min, long max); +int snd_mixer_selem_get_capture_volume_range(snd_mixer_elem_t *elem, + long *min, long *max); +int snd_mixer_selem_get_capture_dB_range(snd_mixer_elem_t *elem, + long *min, long *max); +int snd_mixer_selem_set_capture_volume_range(snd_mixer_elem_t *elem, + long min, long max); + +int snd_mixer_selem_is_enumerated(snd_mixer_elem_t *elem); +int snd_mixer_selem_is_enum_playback(snd_mixer_elem_t *elem); +int snd_mixer_selem_is_enum_capture(snd_mixer_elem_t *elem); +int snd_mixer_selem_get_enum_items(snd_mixer_elem_t *elem); +int snd_mixer_selem_get_enum_item_name(snd_mixer_elem_t *elem, unsigned int idx, size_t maxlen, char *str); +int snd_mixer_selem_get_enum_item(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int *idxp); +int snd_mixer_selem_set_enum_item(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int idx); + +size_t snd_mixer_selem_id_sizeof(void); +/** \hideinitializer + * \brief allocate an invalid #snd_mixer_selem_id_t using standard alloca + * \param ptr returned pointer + */ +#define snd_mixer_selem_id_alloca(ptr) do { assert(ptr); *ptr = (snd_mixer_selem_id_t *) alloca(snd_mixer_selem_id_sizeof()); memset(*ptr, 0, snd_mixer_selem_id_sizeof()); } while (0) +int snd_mixer_selem_id_malloc(snd_mixer_selem_id_t **ptr); +void snd_mixer_selem_id_free(snd_mixer_selem_id_t *obj); +void snd_mixer_selem_id_copy(snd_mixer_selem_id_t *dst, const snd_mixer_selem_id_t *src); +const char *snd_mixer_selem_id_get_name(const snd_mixer_selem_id_t *obj); +unsigned int snd_mixer_selem_id_get_index(const snd_mixer_selem_id_t *obj); +void snd_mixer_selem_id_set_name(snd_mixer_selem_id_t *obj, const char *val); +void snd_mixer_selem_id_set_index(snd_mixer_selem_id_t *obj, unsigned int val); + +/** \} */ + +/** \} */ + +#ifdef __cplusplus +} +#endif + +#endif /* __ALSA_MIXER_H */ + |