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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_DB_SCALE_MASK 0xffff |
42 | #define TLV_DB_SCALE_MUTE 0x10000 |
43 | #define TLV_DB_SCALE_ITEM(min, step, mute) \ |
44 | SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int), \ |
45 | (min), ((step) & TLV_DB_SCALE_MASK) | ((mute) ? TLV_DB_SCALE_MUTE : 0) |
46 | #define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ |
47 | unsigned int name[] = { TLV_DB_SCALE_ITEM(min, step, mute) } |
48 | |
49 | /* dB scale specified with min/max values instead of step */ |
50 | #define TLV_DB_MINMAX_ITEM(min_dB, max_dB) \ |
51 | SNDRV_CTL_TLVT_DB_MINMAX, 2 * sizeof(unsigned int), \ |
52 | (min_dB), (max_dB) |
53 | #define TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ |
54 | SNDRV_CTL_TLVT_DB_MINMAX_MUTE, 2 * sizeof(unsigned int), \ |
55 | (min_dB), (max_dB) |
56 | #define DECLARE_TLV_DB_MINMAX(name, min_dB, max_dB) \ |
57 | unsigned int name[] = { TLV_DB_MINMAX_ITEM(min_dB, max_dB) } |
58 | #define DECLARE_TLV_DB_MINMAX_MUTE(name, min_dB, max_dB) \ |
59 | unsigned int name[] = { TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) } |
60 | |
61 | /* linear volume between min_dB and max_dB (.01dB unit) */ |
62 | #define TLV_DB_LINEAR_ITEM(min_dB, max_dB) \ |
63 | SNDRV_CTL_TLVT_DB_LINEAR, 2 * sizeof(unsigned int), \ |
64 | (min_dB), (max_dB) |
65 | #define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB) \ |
66 | unsigned int name[] = { TLV_DB_LINEAR_ITEM(min_dB, max_dB) } |
67 | |
68 | /* dB range container */ |
69 | /* Each item is: <min> <max> <TLV> */ |
70 | /* The below assumes that each item TLV is 4 words like DB_SCALE or LINEAR */ |
71 | #define TLV_DB_RANGE_HEAD(num) \ |
72 | SNDRV_CTL_TLVT_DB_RANGE, 6 * (num) * sizeof(unsigned int) |
73 | |
74 | #define TLV_DB_GAIN_MUTE -9999999 |
75 | |
76 | #endif /* __SOUND_TLV_H */ |
77 |
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Tags:
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v2.6.34-rc5
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