projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 42750b04 JK |
1 | #ifndef __SOUND_TLV_H |
| 2 | #define __SOUND_TLV_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Advanced Linux Sound Architecture - ALSA - Driver | |
| c1017a4c | 6 | * Copyright (c) 2006 by Jaroslav Kysela <[email protected]> |
| 42750b04 JK |
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 */ | |
| 063a40d9 | 36 | #define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ |
| 55a29af5 | 37 | #define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */ |
| 42750b04 | 38 | |
| 55a29af5 TI |
39 | #define TLV_DB_SCALE_ITEM(min, step, mute) \ |
| 40 | SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int), \ | |
| 41 | (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) | |
| 42750b04 | 42 | #define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ |
| 55a29af5 | 43 | unsigned int name[] = { TLV_DB_SCALE_ITEM(min, step, mute) } |
| 42750b04 | 44 | |
| 063a40d9 | 45 | /* linear volume between min_dB and max_dB (.01dB unit) */ |
| 55a29af5 TI |
46 | #define TLV_DB_LINEAR_ITEM(min_dB, max_dB) \ |
| 47 | SNDRV_CTL_TLVT_DB_LINEAR, 2 * sizeof(unsigned int), \ | |
| 48 | (min_dB), (max_dB) | |
| 063a40d9 | 49 | #define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB) \ |
| 55a29af5 TI |
50 | unsigned int name[] = { TLV_DB_LINEAR_ITEM(min_dB, max_dB) } |
| 51 | ||
| 52 | /* dB range container */ | |
| 53 | /* Each item is: <min> <max> <TLV> */ | |
| 54 | /* The below assumes that each item TLV is 4 words like DB_SCALE or LINEAR */ | |
| 55 | #define TLV_DB_RANGE_HEAD(num) \ | |
| 56 | SNDRV_CTL_TLVT_DB_RANGE, 6 * (num) * sizeof(unsigned int) | |
| 063a40d9 TI |
57 | |
| 58 | #define TLV_DB_GAIN_MUTE -9999999 | |
| 59 | ||
| 42750b04 | 60 | #endif /* __SOUND_TLV_H */ |