107 lines
4.0 KiB
C
107 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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#ifndef __UAPI_SOUND_TLV_H
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#define __UAPI_SOUND_TLV_H
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#define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */
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#define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */
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#define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */
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#define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */
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#define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */
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#define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */
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/*
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* channel-mapping TLV items
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* TLV length must match with num_channels
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*/
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#define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */
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#define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */
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#define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */
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/*
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* TLV structure is right behind the struct snd_ctl_tlv:
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* unsigned int type - see SNDRV_CTL_TLVT_*
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* unsigned int length
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* .... data aligned to sizeof(unsigned int), use
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* block_length = (length + (sizeof(unsigned int) - 1)) &
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* ~(sizeof(unsigned int) - 1)) ....
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*/
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#define SNDRV_CTL_TLVD_ITEM(type, ...) \
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(type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__
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#define SNDRV_CTL_TLVD_LENGTH(...) \
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((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ }))
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/* Accessor offsets for TLV data items */
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#define SNDRV_CTL_TLVO_TYPE 0
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#define SNDRV_CTL_TLVO_LEN 1
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#define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__)
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#define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \
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}
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#define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff
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#define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000
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#define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \
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(min), \
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((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \
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((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0))
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#define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
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}
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/* Accessor offsets for min, mute and step items in dB scale type TLV */
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#define SNDRV_CTL_TLVO_DB_SCALE_MIN 2
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#define SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP 3
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/* dB scale specified with min/max values instead of step */
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#define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
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}
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#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
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}
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/* Accessor offsets for min, max items in db-minmax types of TLV. */
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#define SNDRV_CTL_TLVO_DB_MINMAX_MIN 2
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#define SNDRV_CTL_TLVO_DB_MINMAX_MAX 3
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/* linear volume between min_dB and max_dB (.01dB unit) */
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#define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
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}
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/* Accessor offsets for min, max items in db-linear type of TLV. */
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#define SNDRV_CTL_TLVO_DB_LINEAR_MIN 2
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#define SNDRV_CTL_TLVO_DB_LINEAR_MAX 3
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/* dB range container:
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* Items in dB range container must be ordered by their values and by their
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* dB values. This implies that larger values must correspond with larger
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* dB values (which is also required for all other mixer controls).
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*/
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/* Each item is: <min> <max> <TLV> */
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#define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__)
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#define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \
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}
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#define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999
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#endif
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