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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 <perex@suse.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 */ | |
063a40d9 | 36 | #define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ |
42750b04 JK |
37 | |
38 | #define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ | |
39 | unsigned int name[] = { \ | |
40 | SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int), \ | |
41 | (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) \ | |
42 | } | |
43 | ||
063a40d9 TI |
44 | /* linear volume between min_dB and max_dB (.01dB unit) */ |
45 | #define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB) \ | |
46 | unsigned int name[] = { \ | |
47 | SNDRV_CTL_TLVT_DB_LINEAR, 2 * sizeof(unsigned int), \ | |
48 | (min_dB), (max_dB) \ | |
49 | } | |
50 | ||
51 | #define TLV_DB_GAIN_MUTE -9999999 | |
52 | ||
42750b04 | 53 | #endif /* __SOUND_TLV_H */ |