mirror of
https://gitee.com/openharmony/third_party_alsa-lib
synced 2024-11-23 07:30:32 +00:00
132 lines
5.5 KiB
C
132 lines
5.5 KiB
C
/****************************************************************************
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* *
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* mixer.h *
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* Mixer Interface *
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* *
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****************************************************************************/
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typedef struct _snd_mixer snd_mixer_t;
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typedef struct _snd_mixer_class snd_mixer_class_t;
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typedef struct _snd_mixer_info snd_mixer_info_t;
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typedef struct _snd_mixer_elem snd_mixer_elem_t;
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typedef int (*snd_mixer_callback_t)(snd_mixer_t *ctl,
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snd_ctl_event_type_t event,
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snd_mixer_elem_t *elem);
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typedef int (*snd_mixer_elem_callback_t)(snd_mixer_elem_t *elem,
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snd_ctl_event_type_t event);
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typedef int (*snd_mixer_compare_t)(const snd_mixer_elem_t *e1,
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const snd_mixer_elem_t *e2);
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enum _snd_mixer_elem_type {
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SND_MIXER_ELEM_SIMPLE,
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SND_MIXER_ELEM_LAST = SND_MIXER_ELEM_SIMPLE,
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};
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#ifdef SND_ENUM_TYPECHECK
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typedef struct __snd_mixer_elem_type *snd_mixer_elem_type_t;
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#else
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typedef enum _snd_mixer_elem_type snd_mixer_elem_type_t;
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#endif
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#define SND_MIXER_ELEM_SIMPLE ((snd_mixer_elem_type_t) SND_MIXER_ELEM_SIMPLE)
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#define SND_MIXER_ELEM_LAST ((snd_mixer_elem_type_t) SND_MIXER_ELEM_LAST)
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#ifdef __cplusplus
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extern "C" {
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#endif
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int snd_mixer_open(snd_mixer_t **mixer);
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int snd_mixer_close(snd_mixer_t *mixer);
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int snd_mixer_info(snd_mixer_t *mixer, snd_mixer_info_t *info);
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snd_mixer_elem_t *snd_mixer_first_elem(snd_mixer_t *mixer);
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snd_mixer_elem_t *snd_mixer_last_elem(snd_mixer_t *mixer);
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int snd_mixer_handle_events(snd_mixer_t *mixer);
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int snd_mixer_attach(snd_mixer_t *mixer, const char *name);
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int snd_mixer_detach(snd_mixer_t *mixer, const char *name);
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int snd_mixer_poll_descriptor(snd_mixer_t *mixer, const char *name);
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int snd_mixer_load(snd_mixer_t *mixer);
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int snd_mixer_set_compare(snd_mixer_t *mixer, snd_mixer_compare_t msort);
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snd_mixer_elem_t *snd_mixer_elem_next(snd_mixer_elem_t *elem);
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snd_mixer_elem_t *snd_mixer_elem_prev(snd_mixer_elem_t *helem);
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int snd_mixer_class_unregister(snd_mixer_class_t *clss);
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#ifdef __cplusplus
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}
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#endif
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/*
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* Simple (legacy) mixer API
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*/
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enum _snd_mixer_selem_channel_id {
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SND_MIXER_SCHN_UNKNOWN = -1,
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SND_MIXER_SCHN_FRONT_LEFT = 0,
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SND_MIXER_SCHN_FRONT_RIGHT,
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SND_MIXER_SCHN_FRONT_CENTER,
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SND_MIXER_SCHN_REAR_LEFT,
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SND_MIXER_SCHN_REAR_RIGHT,
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SND_MIXER_SCHN_WOOFER,
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SND_MIXER_SCHN_LAST = 31,
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SND_MIXER_SCHN_MONO = SND_MIXER_SCHN_FRONT_LEFT
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};
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/* Simple mixer */
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typedef struct _snd_mixer_selem_info snd_mixer_selem_info_t;
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typedef struct _snd_mixer_selem_value snd_mixer_selem_value_t;
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typedef struct _snd_mixer_selem_id snd_mixer_selem_id_t;
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#ifdef SND_ENUM_TYPECHECK
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typedef struct __snd_mixer_selem_channel_id *snd_mixer_selem_channel_id_t;
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#else
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typedef enum _snd_mixer_selem_channel_id snd_mixer_selem_channel_id_t;
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#endif
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#define SND_MIXER_SCHN_UNKNOWN ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_UNKNOWN)
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#define SND_MIXER_SCHN_FRONT_LEFT ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_FRONT_LEFT)
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#define SND_MIXER_SCHN_FRONT_RIGHT ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_FRONT_RIGHT)
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#define SND_MIXER_SCHN_FRONT_CENTER ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_FRONT_CENTER)
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#define SND_MIXER_SCHN_REAR_LEFT ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_REAR_LEFT)
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#define SND_MIXER_SCHN_REAR_RIGHT ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_REAR_RIGHT)
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#define SND_MIXER_SCHN_WOOFER ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_WOOFER)
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#define SND_MIXER_SCHN_LAST ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_LAST)
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#define SND_MIXER_SCHN_MONO ((snd_mixer_selem_channel_id_t) SND_MIXER_SCHN_MONO)
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#ifdef __cplusplus
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extern "C" {
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#endif
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const char *snd_mixer_selem_channel_name(snd_mixer_selem_channel_id_t channel);
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int snd_mixer_selem_register(snd_mixer_t *mixer, snd_mixer_class_t **classp);
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void snd_mixer_selem_get_id(snd_mixer_elem_t *element,
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snd_mixer_selem_id_t *id);
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snd_mixer_elem_t *snd_mixer_find_selem(snd_mixer_t *mixer,
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const snd_mixer_selem_id_t *id);
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int snd_mixer_selem_info(snd_mixer_elem_t *element,
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snd_mixer_selem_info_t *info);
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int snd_mixer_selem_read(snd_mixer_elem_t *element,
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snd_mixer_selem_value_t *value);
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int snd_mixer_selem_write(snd_mixer_elem_t *element,
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const snd_mixer_selem_value_t *value);
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int snd_mixer_selem_info_is_mono(const snd_mixer_selem_info_t *info);
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int snd_mixer_selem_info_has_channel(const snd_mixer_selem_info_t *obj, snd_mixer_selem_channel_id_t channel);
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long snd_mixer_selem_value_get_volume(const snd_mixer_selem_value_t *obj, snd_mixer_selem_channel_id_t channel);
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void snd_mixer_selem_value_set_volume(snd_mixer_selem_value_t *obj, snd_mixer_selem_channel_id_t channel, long value);
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int snd_mixer_selem_value_get_mute(const snd_mixer_selem_value_t *obj, snd_mixer_selem_channel_id_t channel);
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int snd_mixer_selem_value_get_capture(const snd_mixer_selem_value_t *obj, snd_mixer_selem_channel_id_t channel);
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void snd_mixer_selem_value_set_mute(snd_mixer_selem_value_t *obj, snd_mixer_selem_channel_id_t channel, int mute);
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void snd_mixer_selem_value_set_capture(snd_mixer_selem_value_t *obj, snd_mixer_selem_channel_id_t channel, int capture);
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void snd_mixer_selem_value_set_mute_all(snd_mixer_selem_value_t *obj, int mute);
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void snd_mixer_selem_value_set_capture_all(snd_mixer_selem_value_t *obj, int capture);
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void snd_mixer_selem_value_set_volume_all(snd_mixer_selem_value_t *obj, long value);
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#ifdef __cplusplus
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}
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#endif
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