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