mirror of
https://gitee.com/openharmony/third_party_alsa-lib
synced 2024-11-27 01:31:08 +00:00
54 lines
2.5 KiB
C
54 lines
2.5 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_callbacks {
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void *private_data; /* should be used with an application */
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void (*rebuild) (void *private_data);
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void (*element) (void *private_data, int cmd, snd_mixer_eid_t *eid);
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void (*group) (void *private_data, int cmd, snd_mixer_gid_t *gid);
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void *reserved[28]; /* reserved for the future use - must be NULL!!! */
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} snd_mixer_callbacks_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct snd_mixer snd_mixer_t;
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int snd_mixer_open(snd_mixer_t **handle, int card, int device);
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int snd_mixer_close(snd_mixer_t *handle);
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int snd_mixer_file_descriptor(snd_mixer_t *handle);
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int snd_mixer_info(snd_mixer_t *handle, snd_mixer_info_t * info);
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int snd_mixer_elements(snd_mixer_t *handle, snd_mixer_elements_t * elements);
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int snd_mixer_routes(snd_mixer_t *handle, snd_mixer_routes_t * routes);
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int snd_mixer_groups(snd_mixer_t *handle, snd_mixer_groups_t * groups);
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int snd_mixer_group_read(snd_mixer_t *handle, snd_mixer_group_t * group);
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int snd_mixer_group_write(snd_mixer_t *handle, snd_mixer_group_t * group);
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int snd_mixer_element_info(snd_mixer_t *handle, snd_mixer_element_info_t * info);
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int snd_mixer_element_read(snd_mixer_t *handle, snd_mixer_element_t * element);
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int snd_mixer_element_write(snd_mixer_t *handle, snd_mixer_element_t * element);
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int snd_mixer_get_filter(snd_mixer_t *handle, snd_mixer_filter_t * filter);
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int snd_mixer_put_filter(snd_mixer_t *handle, snd_mixer_filter_t * filter);
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int snd_mixer_read(snd_mixer_t *handle, snd_mixer_callbacks_t * callbacks);
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void snd_mixer_set_bit(unsigned int *bitmap, int bit, int val);
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int snd_mixer_get_bit(unsigned int *bitmap, int bit);
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const char *snd_mixer_channel_name(int channel);
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int snd_mixer_element_has_info(snd_mixer_eid_t *eid);
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int snd_mixer_element_info_build(snd_mixer_t *handle, snd_mixer_element_info_t * info);
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int snd_mixer_element_info_free(snd_mixer_element_info_t * info);
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int snd_mixer_element_has_control(snd_mixer_eid_t *eid);
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int snd_mixer_element_build(snd_mixer_t *handle, snd_mixer_element_t * element);
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int snd_mixer_element_free(snd_mixer_element_t * element);
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#ifdef __cplusplus
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}
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#endif
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