v4l2_subdev/
lib.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
/* Copyright (C) 2025 DorotaC
 * SPDX-License-Identifier: LGPL-2.1-or-later OR MPL-2.0
 */

/*! A safe wrapper around Linux V4l2 subdevice interface. */

use bitflags::bitflags;
use const_enum::const_enum;
use nix;
use std::mem;

/// The unsafe wrapper
#[allow(non_camel_case_types)]
#[allow(non_snake_case)]
#[allow(non_upper_case_globals)]
pub mod sys;

pub use sys::{v4l2_field, v4l2_colorspace, v4l2_quantization, v4l2_xfer_func};

pub trait Zeroed where Self: Sized {
    fn zeroed() -> Self {
        unsafe { mem::zeroed() }
    }
}

impl Zeroed for sys::v4l2_subdev_capability {}
impl Zeroed for sys::v4l2_subdev_mbus_code_enum {}
impl Zeroed for sys::v4l2_subdev_frame_size_enum {}
impl Zeroed for sys::v4l2_subdev_format {}
impl Zeroed for sys::v4l2_mbus_framefmt {}
  
const_enum! {
    #[allow(non_camel_case_types)]
    enum MediaBusFmt, sys, MEDIA_BUS_FMT_ {
        FIXED,
        RGB444_1X12,
        RGB444_2X8_PADHI_BE,
        RGB444_2X8_PADHI_LE,
        RGB555_2X8_PADHI_BE,
        RGB555_2X8_PADHI_LE,
        RGB565_1X16,
        BGR565_2X8_BE,
        BGR565_2X8_LE,
        RGB565_2X8_BE,
        RGB565_2X8_LE,
        RGB666_1X18,
        RGB666_2X9_BE,
        BGR666_1X18,
        RBG888_1X24,
        RGB666_1X24_CPADHI,
        BGR666_1X24_CPADHI,
        RGB565_1X24_CPADHI,
        RGB666_1X7X3_SPWG,
        BGR888_1X24,
        BGR888_3X8,
        GBR888_1X24,
        RGB888_1X24,
        RGB888_2X12_BE,
        RGB888_2X12_LE,
        RGB888_3X8,
        RGB888_3X8_DELTA,
        RGB888_1X7X4_SPWG,
        RGB888_1X7X4_JEIDA,
        RGB666_1X30_CPADLO,
        RGB888_1X30_CPADLO,
        ARGB8888_1X32,
        RGB888_1X32_PADHI,
        RGB101010_1X30,
        RGB666_1X36_CPADLO,
        RGB888_1X36_CPADLO,
        RGB121212_1X36,
        RGB161616_1X48,
        Y8_1X8,
        UV8_1X8,
        UYVY8_1_5X8,
        VYUY8_1_5X8,
        YUYV8_1_5X8,
        YVYU8_1_5X8,
        UYVY8_2X8,
        VYUY8_2X8,
        YUYV8_2X8,
        YVYU8_2X8,
        Y10_1X10,
        Y10_2X8_PADHI_LE,
        UYVY10_2X10,
        VYUY10_2X10,
        YUYV10_2X10,
        YVYU10_2X10,
        Y12_1X12,
        UYVY12_2X12,
        VYUY12_2X12,
        YUYV12_2X12,
        YVYU12_2X12,
        Y14_1X14,
        Y16_1X16,
        UYVY8_1X16,
        VYUY8_1X16,
        YUYV8_1X16,
        YVYU8_1X16,
        YDYUYDYV8_1X16,
        UYVY10_1X20,
        VYUY10_1X20,
        YUYV10_1X20,
        YVYU10_1X20,
        VUY8_1X24,
        YUV8_1X24,
        UYYVYY8_0_5X24,
        UYVY12_1X24,
        VYUY12_1X24,
        YUYV12_1X24,
        YVYU12_1X24,
        YUV10_1X30,
        UYYVYY10_0_5X30,
        AYUV8_1X32,
        UYYVYY12_0_5X36,
        YUV12_1X36,
        YUV16_1X48,
        UYYVYY16_0_5X48,
        SBGGR8_1X8,
        SGBRG8_1X8,
        SGRBG8_1X8,
        SRGGB8_1X8,
        SBGGR10_ALAW8_1X8,
        SGBRG10_ALAW8_1X8,
        SGRBG10_ALAW8_1X8,
        SRGGB10_ALAW8_1X8,
        SBGGR10_DPCM8_1X8,
        SGBRG10_DPCM8_1X8,
        SGRBG10_DPCM8_1X8,
        SRGGB10_DPCM8_1X8,
        SBGGR10_2X8_PADHI_BE,
        SBGGR10_2X8_PADHI_LE,
        SBGGR10_2X8_PADLO_BE,
        SBGGR10_2X8_PADLO_LE,
        SBGGR10_1X10,
        SGBRG10_1X10,
        SGRBG10_1X10,
        SRGGB10_1X10,
        SBGGR12_1X12,
        SGBRG12_1X12,
        SGRBG12_1X12,
        SRGGB12_1X12,
        SBGGR14_1X14,
        SGBRG14_1X14,
        SGRBG14_1X14,
        SRGGB14_1X14,
        SBGGR16_1X16,
        SGBRG16_1X16,
        SGRBG16_1X16,
        SRGGB16_1X16,
        JPEG_1X8,
        S5C_UYVY_JPEG_1X8,
        AHSV8888_1X32,
        METADATA_FIXED,
        META_8,
        META_10,
        META_12,
        META_14,
        META_16,
        META_20,
        META_24,
    }
}

bitflags! {
    #[derive(Debug, PartialEq, Clone, Copy)]
    pub struct MbusFrameFormatFlags: u16 {
        const SET_CSC = sys::V4L2_MBUS_FRAMEFMT_SET_CSC as u16;
    }
}

nix::ioctl_read!(querycap                       , b'V',  0, sys::v4l2_subdev_capability);
nix::ioctl_readwrite!(g_fmt                     , b'V',  4, sys::v4l2_subdev_format);
nix::ioctl_readwrite!(s_fmt                     , b'V',  5, sys::v4l2_subdev_format);
nix::ioctl_readwrite!(g_frame_interval          , b'V', 21, sys::v4l2_subdev_frame_interval);
nix::ioctl_readwrite!(s_frame_interval          , b'V', 22, sys::v4l2_subdev_frame_interval);
nix::ioctl_readwrite!(enum_mbus_code            , b'V',  2, sys::v4l2_subdev_mbus_code_enum);
nix::ioctl_readwrite!(enum_frame_size           , b'V', 74, sys::v4l2_subdev_frame_size_enum);
nix::ioctl_readwrite!(enum_frame_interval       , b'V', 75, sys::v4l2_subdev_frame_interval_enum);
nix::ioctl_readwrite!(g_crop                    , b'V', 59, sys::v4l2_subdev_crop);
nix::ioctl_readwrite!(s_crop                    , b'V', 60, sys::v4l2_subdev_crop);
nix::ioctl_readwrite!(g_selection               , b'V', 61, sys::v4l2_subdev_selection);
nix::ioctl_readwrite!(s_selection               , b'V', 62, sys::v4l2_subdev_selection);
nix::ioctl_readwrite!(g_routing                 , b'V', 38, sys::v4l2_subdev_routing);
nix::ioctl_readwrite!(s_routing                 , b'V', 39, sys::v4l2_subdev_routing);
nix::ioctl_read!(g_client_cap           , b'V',  101, sys::v4l2_subdev_client_capability);
nix::ioctl_readwrite!(s_client_cap              , b'V',  102, sys::v4l2_subdev_client_capability);
nix::ioctl_read!(g_std                  , b'V', 23, sys::v4l2_std_id);
// TODO: Not sure how this works. Not needed now.
//nix::ioctl_write_int!(s_std, b'V', 24, sys::v4l2_std_id);
nix::ioctl_readwrite!(enumstd                   , b'V', 25, sys::v4l2_standard);
nix::ioctl_readwrite!(g_edid                    , b'V', 40, sys::v4l2_edid);
nix::ioctl_readwrite!(s_edid                    , b'V', 41, sys::v4l2_edid);
nix::ioctl_read!(querystd                       , b'V', 63, sys::v4l2_std_id);
nix::ioctl_readwrite!(s_dv_timings              , b'V', 87, sys::v4l2_dv_timings);
nix::ioctl_readwrite!(g_dv_timings              , b'V', 88, sys::v4l2_dv_timings);
nix::ioctl_readwrite!(enum_dv_timings           , b'V', 98, sys::v4l2_enum_dv_timings);
nix::ioctl_read!(query_dv_timings               , b'V', 99, sys::v4l2_dv_timings);
nix::ioctl_readwrite!(dv_timings_cap            , b'V', 100, sys::v4l2_dv_timings_cap);