1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 */ 12 13 #ifndef __UAPI_SOUND_TLV_H 14 #define __UAPI_SOUND_TLV_H 15 16 #define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */ 17 #define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */ 18 #define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ 19 #define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */ 20 #define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */ 21 #define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */ 22 23 /* 24 * channel-mapping TLV items 25 * TLV length must match with num_channels 26 */ 27 #define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */ 28 #define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */ 29 #define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */ 30 31 /* 32 * TLV structure is right behind the struct snd_ctl_tlv: 33 * unsigned int type - see SNDRV_CTL_TLVT_* 34 * unsigned int length 35 * .... data aligned to sizeof(unsigned int), use 36 * block_length = (length + (sizeof(unsigned int) - 1)) & 37 * ~(sizeof(unsigned int) - 1)) .... 38 */ 39 #define SNDRV_CTL_TLVD_ITEM(type, ...) \ 40 (type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__ 41 #define SNDRV_CTL_TLVD_LENGTH(...) \ 42 ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ })) 43 44 #define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \ 45 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__) 46 #define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \ 47 unsigned int name[] = { \ 48 SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \ 49 } 50 51 #define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff 52 #define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000 53 #define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 54 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \ 55 (min), \ 56 ((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \ 57 ((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0)) 58 #define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \ 59 unsigned int name[] = { \ 60 SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 61 } 62 63 /* dB scale specified with min/max values instead of step */ 64 #define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 65 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB)) 66 #define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 67 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB)) 68 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \ 69 unsigned int name[] = { \ 70 SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 71 } 72 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \ 73 unsigned int name[] = { \ 74 SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 75 } 76 77 /* linear volume between min_dB and max_dB (.01dB unit) */ 78 #define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 79 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB)) 80 #define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \ 81 unsigned int name[] = { \ 82 SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 83 } 84 85 /* dB range container: 86 * Items in dB range container must be ordered by their values and by their 87 * dB values. This implies that larger values must correspond with larger 88 * dB values (which is also required for all other mixer controls). 89 */ 90 /* Each item is: <min> <max> <TLV> */ 91 #define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \ 92 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__) 93 #define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \ 94 unsigned int name[] = { \ 95 SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \ 96 } 97 98 #define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999 99 100 #endif 101