37 lines
861 B
C
37 lines
861 B
C
#pragma once
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#include <stdint.h>
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#define SND_MAX_KNOBS 256
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#define SND_KNOB_NAME_SIZE 256
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#define SND_KNOB_MAX_VALUE UINT32_MAX
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#define SND_KNOB_MASTER 0
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#define SND_DEVICE_MAIN 0
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typedef struct snd_knob_list {
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uint32_t device; /* IN */
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uint32_t num; /* OUT */
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uint32_t ids[SND_MAX_KNOBS]; /* OUT */
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} snd_knob_list_t;
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typedef struct snd_knob_info {
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uint32_t device; /* IN */
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uint32_t id; /* IN */
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char name[SND_KNOB_NAME_SIZE]; /* OUT */
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} snd_knob_info_t;
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typedef struct snd_knob_value {
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uint32_t device; /* IN */
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uint32_t id; /* IN */
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uint32_t val; /* OUT for SND_MIXER_READ_KNOB, IN for SND_MIXER_WRITE_KNOB */
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} snd_knob_value_t;
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/* IOCTLs */
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#define SND_MIXER_GET_KNOBS 0
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#define SND_MIXER_GET_KNOB_INFO 1
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#define SND_MIXER_READ_KNOB 2
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#define SND_MIXER_WRITE_KNOB 3
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