tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12
13#ifndef __UAPI_SOUND_TLV_H
14#define __UAPI_SOUND_TLV_H
15
16#define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */
17#define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */
18#define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */
19#define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */
20#define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */
21#define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */
22
23/*
24 * channel-mapping TLV items
25 * TLV length must match with num_channels
26 */
27#define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */
28#define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */
29#define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */
30
31/*
32 * TLV structure is right behind the struct snd_ctl_tlv:
33 * unsigned int type - see SNDRV_CTL_TLVT_*
34 * unsigned int length
35 * .... data aligned to sizeof(unsigned int), use
36 * block_length = (length + (sizeof(unsigned int) - 1)) &
37 * ~(sizeof(unsigned int) - 1)) ....
38 */
39#define SNDRV_CTL_TLVD_ITEM(type, ...) \
40 (type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__
41#define SNDRV_CTL_TLVD_LENGTH(...) \
42 ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ }))
43
44#define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \
45 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__)
46#define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \
47 unsigned int name[] = { \
48 SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \
49 }
50
51#define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff
52#define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000
53#define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
54 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \
55 (min), \
56 ((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \
57 ((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0))
58#define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \
59 unsigned int name[] = { \
60 SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
61 }
62
63/* dB scale specified with min/max values instead of step */
64#define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
65 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB))
66#define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
67 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB))
68#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \
69 unsigned int name[] = { \
70 SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
71 }
72#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \
73 unsigned int name[] = { \
74 SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
75 }
76
77/* linear volume between min_dB and max_dB (.01dB unit) */
78#define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
79 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB))
80#define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \
81 unsigned int name[] = { \
82 SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
83 }
84
85/* dB range container:
86 * Items in dB range container must be ordered by their values and by their
87 * dB values. This implies that larger values must correspond with larger
88 * dB values (which is also required for all other mixer controls).
89 */
90/* Each item is: <min> <max> <TLV> */
91#define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \
92 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__)
93#define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \
94 unsigned int name[] = { \
95 SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \
96 }
97
98#define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999
99
100#endif