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 | |
| 6 | * Copyright (c) 2006 by Jaroslav Kysela <[email protected]> | |
| 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 | ||
| 37 | #define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ | |
| 38 | unsigned int name[] = { \ | |
| 39 | SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int), \ | |
| 40 | (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) \ | |
| 41 | } | |
| 42 | ||
| 43 | #endif /* __SOUND_TLV_H */ |