| 1 | #ifndef __SOUND_TLV_H |
| 2 | #define __SOUND_TLV_H |
| 3 | |
| 4 | /* |
| 5 | * Advanced Linux Sound Architecture - ALSA - Driver |
| 6 | * Copyright (c) 2006 by Jaroslav Kysela <perex@perex.cz> |
| 7 | * |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * TLV structure is right behind the struct snd_ctl_tlv: |
| 27 | * unsigned int type - see SNDRV_CTL_TLVT_* |
| 28 | * unsigned int length |
| 29 | * .... data aligned to sizeof(unsigned int), use |
| 30 | * block_length = (length + (sizeof(unsigned int) - 1)) & |
| 31 | * ~(sizeof(unsigned int) - 1)) .... |
| 32 | */ |
| 33 | |
| 34 | #define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */ |
| 35 | #define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */ |
| 36 | #define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ |
| 37 | #define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */ |
| 38 | #define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */ |
| 39 | #define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */ |
| 40 | |
| 41 | #define TLV_ITEM(type, ...) \ |
| 42 | (type), TLV_LENGTH(__VA_ARGS__), __VA_ARGS__ |
| 43 | #define TLV_LENGTH(...) \ |
| 44 | ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ })) |
| 45 | |
| 46 | #define TLV_CONTAINER_ITEM(...) \ |
| 47 | TLV_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__) |
| 48 | #define DECLARE_TLV_CONTAINER(name, ...) \ |
| 49 | unsigned int name[] = { TLV_CONTAINER_ITEM(__VA_ARGS__) } |
| 50 | |
| 51 | #define TLV_DB_SCALE_MASK 0xffff |
| 52 | #define TLV_DB_SCALE_MUTE 0x10000 |
| 53 | #define TLV_DB_SCALE_ITEM(min, step, mute) \ |
| 54 | TLV_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \ |
| 55 | (min), \ |
| 56 | ((step) & TLV_DB_SCALE_MASK) | \ |
| 57 | ((mute) ? TLV_DB_SCALE_MUTE : 0)) |
| 58 | #define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ |
| 59 | unsigned int name[] = { TLV_DB_SCALE_ITEM(min, step, mute) } |
| 60 | |
| 61 | /* dB scale specified with min/max values instead of step */ |
| 62 | #define TLV_DB_MINMAX_ITEM(min_dB, max_dB) \ |
| 63 | TLV_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB)) |
| 64 | #define TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ |
| 65 | TLV_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB)) |
| 66 | #define DECLARE_TLV_DB_MINMAX(name, min_dB, max_dB) \ |
| 67 | unsigned int name[] = { TLV_DB_MINMAX_ITEM(min_dB, max_dB) } |
| 68 | #define DECLARE_TLV_DB_MINMAX_MUTE(name, min_dB, max_dB) \ |
| 69 | unsigned int name[] = { TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) } |
| 70 | |
| 71 | /* linear volume between min_dB and max_dB (.01dB unit) */ |
| 72 | #define TLV_DB_LINEAR_ITEM(min_dB, max_dB) \ |
| 73 | TLV_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB)) |
| 74 | #define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB) \ |
| 75 | unsigned int name[] = { TLV_DB_LINEAR_ITEM(min_dB, max_dB) } |
| 76 | |
| 77 | /* dB range container: |
| 78 | * Items in dB range container must be ordered by their values and by their |
| 79 | * dB values. This implies that larger values must correspond with larger |
| 80 | * dB values (which is also required for all other mixer controls). |
| 81 | */ |
| 82 | /* Each item is: <min> <max> <TLV> */ |
| 83 | #define TLV_DB_RANGE_ITEM(...) \ |
| 84 | TLV_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__) |
| 85 | #define DECLARE_TLV_DB_RANGE(name, ...) \ |
| 86 | unsigned int name[] = { TLV_DB_RANGE_ITEM(__VA_ARGS__) } |
| 87 | /* The below assumes that each item TLV is 4 words like DB_SCALE or LINEAR */ |
| 88 | #define TLV_DB_RANGE_HEAD(num) \ |
| 89 | SNDRV_CTL_TLVT_DB_RANGE, 6 * (num) * sizeof(unsigned int) |
| 90 | |
| 91 | #define TLV_DB_GAIN_MUTE -9999999 |
| 92 | |
| 93 | /* |
| 94 | * channel-mapping TLV items |
| 95 | * TLV length must match with num_channels |
| 96 | */ |
| 97 | #define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */ |
| 98 | #define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */ |
| 99 | #define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */ |
| 100 | |
| 101 | #endif /* __SOUND_TLV_H */ |