1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1. 1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
2 2
3 ********************************************** 3 ********************************************************************************************************************************************************************************************************************************************************************************
4 V4L2_META_FMT_GENERIC_8 ('MET8'), V4L2_META_FM 4 V4L2_META_FMT_GENERIC_8 ('MET8'), V4L2_META_FMT_GENERIC_CSI2_10 ('MC1A'), V4L2_META_FMT_GENERIC_CSI2_12 ('MC1C'), V4L2_META_FMT_GENERIC_CSI2_14 ('MC1E'), V4L2_META_FMT_GENERIC_CSI2_16 ('MC1G'), V4L2_META_FMT_GENERIC_CSI2_20 ('MC1K'), V4L2_META_FMT_GENERIC_CSI2_24 ('MC1O')
5 ********************************************** 5 ********************************************************************************************************************************************************************************************************************************************************************************
6 6
7 7
8 Generic line-based metadata formats 8 Generic line-based metadata formats
9 9
10 10
11 Description 11 Description
12 =========== 12 ===========
13 13
14 These generic line-based metadata formats defi 14 These generic line-based metadata formats define the memory layout of the data
15 without defining the format or meaning of the 15 without defining the format or meaning of the metadata itself.
16 16
17 .. _v4l2-meta-fmt-generic-8: 17 .. _v4l2-meta-fmt-generic-8:
18 18
19 V4L2_META_FMT_GENERIC_8 19 V4L2_META_FMT_GENERIC_8
20 ----------------------- 20 -----------------------
21 21
22 The V4L2_META_FMT_GENERIC_8 format is a plain 22 The V4L2_META_FMT_GENERIC_8 format is a plain 8-bit metadata format. This format
23 is used on CSI-2 for 8 bits per :term:`Data Un 23 is used on CSI-2 for 8 bits per :term:`Data Unit`.
24 24
25 Additionally it is used for 16 bits per Data U 25 Additionally it is used for 16 bits per Data Unit when two bytes of metadata are
26 packed into one 16-bit Data Unit. Otherwise th 26 packed into one 16-bit Data Unit. Otherwise the 16 bits per pixel dataformat is
27 :ref:`V4L2_META_FMT_GENERIC_CSI2_16 <v4l2-meta 27 :ref:`V4L2_META_FMT_GENERIC_CSI2_16 <v4l2-meta-fmt-generic-csi2-16>`.
28 28
29 **Byte Order Of V4L2_META_FMT_GENERIC_8.** 29 **Byte Order Of V4L2_META_FMT_GENERIC_8.**
30 Each cell is one byte. "M" denotes a byte of m 30 Each cell is one byte. "M" denotes a byte of metadata.
31 31
32 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm 32 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|
33 33
34 .. flat-table:: Sample 4x2 Metadata Frame 34 .. flat-table:: Sample 4x2 Metadata Frame
35 :header-rows: 0 35 :header-rows: 0
36 :stub-columns: 0 36 :stub-columns: 0
37 :widths: 12 8 8 8 8 37 :widths: 12 8 8 8 8
38 38
39 * - start + 0: 39 * - start + 0:
40 - M\ :sub:`00` 40 - M\ :sub:`00`
41 - M\ :sub:`10` 41 - M\ :sub:`10`
42 - M\ :sub:`20` 42 - M\ :sub:`20`
43 - M\ :sub:`30` 43 - M\ :sub:`30`
44 * - start + 4: 44 * - start + 4:
45 - M\ :sub:`01` 45 - M\ :sub:`01`
46 - M\ :sub:`11` 46 - M\ :sub:`11`
47 - M\ :sub:`21` 47 - M\ :sub:`21`
48 - M\ :sub:`31` 48 - M\ :sub:`31`
49 49
50 .. _v4l2-meta-fmt-generic-csi2-10: 50 .. _v4l2-meta-fmt-generic-csi2-10:
51 51
52 V4L2_META_FMT_GENERIC_CSI2_10 52 V4L2_META_FMT_GENERIC_CSI2_10
53 ----------------------------- 53 -----------------------------
54 54
55 V4L2_META_FMT_GENERIC_CSI2_10 contains 8-bit g 55 V4L2_META_FMT_GENERIC_CSI2_10 contains 8-bit generic metadata packed in 10-bit
56 Data Units, with one padding byte after every 56 Data Units, with one padding byte after every four bytes of metadata. This
57 format is typically used by CSI-2 receivers wi 57 format is typically used by CSI-2 receivers with a source that transmits
58 MEDIA_BUS_FMT_META_10 and the CSI-2 receiver w 58 MEDIA_BUS_FMT_META_10 and the CSI-2 receiver writes the received data to memory
59 as-is. 59 as-is.
60 60
61 The packing of the data follows the MIPI CSI-2 61 The packing of the data follows the MIPI CSI-2 specification and the padding of
62 the data is defined in the MIPI CCS specificat 62 the data is defined in the MIPI CCS specification.
63 63
64 This format is also used in conjunction with 2 64 This format is also used in conjunction with 20 bits per :term:`Data Unit`
65 formats that pack two bytes of metadata into o 65 formats that pack two bytes of metadata into one Data Unit. Otherwise the
66 20 bits per pixel dataformat is :ref:`V4L2_MET 66 20 bits per pixel dataformat is :ref:`V4L2_META_FMT_GENERIC_CSI2_20
67 <v4l2-meta-fmt-generic-csi2-20>`. 67 <v4l2-meta-fmt-generic-csi2-20>`.
68 68
69 This format is little endian. 69 This format is little endian.
70 70
71 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_10. 71 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_10.**
72 Each cell is one byte. "M" denotes a byte of m 72 Each cell is one byte. "M" denotes a byte of metadata and "x" a byte of padding.
73 73
74 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm 74 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{.8cm}|
75 75
76 .. flat-table:: Sample 4x2 Metadata Frame 76 .. flat-table:: Sample 4x2 Metadata Frame
77 :header-rows: 0 77 :header-rows: 0
78 :stub-columns: 0 78 :stub-columns: 0
79 :widths: 12 8 8 8 8 8 79 :widths: 12 8 8 8 8 8
80 80
81 * - start + 0: 81 * - start + 0:
82 - M\ :sub:`00` 82 - M\ :sub:`00`
83 - M\ :sub:`10` 83 - M\ :sub:`10`
84 - M\ :sub:`20` 84 - M\ :sub:`20`
85 - M\ :sub:`30` 85 - M\ :sub:`30`
86 - x 86 - x
87 * - start + 5: 87 * - start + 5:
88 - M\ :sub:`01` 88 - M\ :sub:`01`
89 - M\ :sub:`11` 89 - M\ :sub:`11`
90 - M\ :sub:`21` 90 - M\ :sub:`21`
91 - M\ :sub:`31` 91 - M\ :sub:`31`
92 - x 92 - x
93 93
94 .. _v4l2-meta-fmt-generic-csi2-12: 94 .. _v4l2-meta-fmt-generic-csi2-12:
95 95
96 V4L2_META_FMT_GENERIC_CSI2_12 96 V4L2_META_FMT_GENERIC_CSI2_12
97 ----------------------------- 97 -----------------------------
98 98
99 V4L2_META_FMT_GENERIC_CSI2_12 contains 8-bit g 99 V4L2_META_FMT_GENERIC_CSI2_12 contains 8-bit generic metadata packed in 12-bit
100 Data Units, with one padding byte after every 100 Data Units, with one padding byte after every two bytes of metadata. This format
101 is typically used by CSI-2 receivers with a so 101 is typically used by CSI-2 receivers with a source that transmits
102 MEDIA_BUS_FMT_META_12 and the CSI-2 receiver w 102 MEDIA_BUS_FMT_META_12 and the CSI-2 receiver writes the received data to memory
103 as-is. 103 as-is.
104 104
105 The packing of the data follows the MIPI CSI-2 105 The packing of the data follows the MIPI CSI-2 specification and the padding of
106 the data is defined in the MIPI CCS specificat 106 the data is defined in the MIPI CCS specification.
107 107
108 This format is also used in conjunction with 2 108 This format is also used in conjunction with 24 bits per :term:`Data Unit`
109 formats that pack two bytes of metadata into o 109 formats that pack two bytes of metadata into one Data Unit. Otherwise the
110 24 bits per pixel dataformat is :ref:`V4L2_MET 110 24 bits per pixel dataformat is :ref:`V4L2_META_FMT_GENERIC_CSI2_24
111 <v4l2-meta-fmt-generic-csi2-24>`. 111 <v4l2-meta-fmt-generic-csi2-24>`.
112 112
113 This format is little endian. 113 This format is little endian.
114 114
115 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_12. 115 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_12.**
116 Each cell is one byte. "M" denotes a byte of m 116 Each cell is one byte. "M" denotes a byte of metadata and "x" a byte of padding.
117 117
118 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm 118 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{.8cm}|p{.8cm}|
119 119
120 .. flat-table:: Sample 4x2 Metadata Frame 120 .. flat-table:: Sample 4x2 Metadata Frame
121 :header-rows: 0 121 :header-rows: 0
122 :stub-columns: 0 122 :stub-columns: 0
123 :widths: 12 8 8 8 8 8 8 123 :widths: 12 8 8 8 8 8 8
124 124
125 * - start + 0: 125 * - start + 0:
126 - M\ :sub:`00` 126 - M\ :sub:`00`
127 - M\ :sub:`10` 127 - M\ :sub:`10`
128 - x 128 - x
129 - M\ :sub:`20` 129 - M\ :sub:`20`
130 - M\ :sub:`30` 130 - M\ :sub:`30`
131 - x 131 - x
132 * - start + 6: 132 * - start + 6:
133 - M\ :sub:`01` 133 - M\ :sub:`01`
134 - M\ :sub:`11` 134 - M\ :sub:`11`
135 - x 135 - x
136 - M\ :sub:`21` 136 - M\ :sub:`21`
137 - M\ :sub:`31` 137 - M\ :sub:`31`
138 - x 138 - x
139 139
140 .. _v4l2-meta-fmt-generic-csi2-14: 140 .. _v4l2-meta-fmt-generic-csi2-14:
141 141
142 V4L2_META_FMT_GENERIC_CSI2_14 142 V4L2_META_FMT_GENERIC_CSI2_14
143 ----------------------------- 143 -----------------------------
144 144
145 V4L2_META_FMT_GENERIC_CSI2_14 contains 8-bit g 145 V4L2_META_FMT_GENERIC_CSI2_14 contains 8-bit generic metadata packed in 14-bit
146 Data Units, with three padding bytes after eve 146 Data Units, with three padding bytes after every four bytes of metadata. This
147 format is typically used by CSI-2 receivers wi 147 format is typically used by CSI-2 receivers with a source that transmits
148 MEDIA_BUS_FMT_META_14 and the CSI-2 receiver w 148 MEDIA_BUS_FMT_META_14 and the CSI-2 receiver writes the received data to memory
149 as-is. 149 as-is.
150 150
151 The packing of the data follows the MIPI CSI-2 151 The packing of the data follows the MIPI CSI-2 specification and the padding of
152 the data is defined in the MIPI CCS specificat 152 the data is defined in the MIPI CCS specification.
153 153
154 This format is little endian. 154 This format is little endian.
155 155
156 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_14. 156 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_14.**
157 Each cell is one byte. "M" denotes a byte of m 157 Each cell is one byte. "M" denotes a byte of metadata and "x" a byte of padding.
158 158
159 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm 159 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{.8cm}|p{.8cm}|p{.8cm}|
160 160
161 .. flat-table:: Sample 4x2 Metadata Frame 161 .. flat-table:: Sample 4x2 Metadata Frame
162 :header-rows: 0 162 :header-rows: 0
163 :stub-columns: 0 163 :stub-columns: 0
164 :widths: 12 8 8 8 8 8 8 8 164 :widths: 12 8 8 8 8 8 8 8
165 165
166 * - start + 0: 166 * - start + 0:
167 - M\ :sub:`00` 167 - M\ :sub:`00`
168 - M\ :sub:`10` 168 - M\ :sub:`10`
169 - M\ :sub:`20` 169 - M\ :sub:`20`
170 - M\ :sub:`30` 170 - M\ :sub:`30`
171 - x 171 - x
172 - x 172 - x
173 - x 173 - x
174 * - start + 7: 174 * - start + 7:
175 - M\ :sub:`01` 175 - M\ :sub:`01`
176 - M\ :sub:`11` 176 - M\ :sub:`11`
177 - M\ :sub:`21` 177 - M\ :sub:`21`
178 - M\ :sub:`31` 178 - M\ :sub:`31`
179 - x 179 - x
180 - x 180 - x
181 - x 181 - x
182 182
183 .. _v4l2-meta-fmt-generic-csi2-16: 183 .. _v4l2-meta-fmt-generic-csi2-16:
184 184
185 V4L2_META_FMT_GENERIC_CSI2_16 185 V4L2_META_FMT_GENERIC_CSI2_16
186 ----------------------------- 186 -----------------------------
187 187
188 V4L2_META_FMT_GENERIC_CSI2_16 contains 8-bit g 188 V4L2_META_FMT_GENERIC_CSI2_16 contains 8-bit generic metadata packed in 16-bit
189 Data Units, with one padding byte after every 189 Data Units, with one padding byte after every byte of metadata. This format is
190 typically used by CSI-2 receivers with a sourc 190 typically used by CSI-2 receivers with a source that transmits
191 MEDIA_BUS_FMT_META_16 and the CSI-2 receiver w 191 MEDIA_BUS_FMT_META_16 and the CSI-2 receiver writes the received data to memory
192 as-is. 192 as-is.
193 193
194 The packing of the data follows the MIPI CSI-2 194 The packing of the data follows the MIPI CSI-2 specification and the padding of
195 the data is defined in the MIPI CCS specificat 195 the data is defined in the MIPI CCS specification.
196 196
197 Some devices support more efficient packing of 197 Some devices support more efficient packing of metadata in conjunction with
198 16-bit image data. In that case the dataformat 198 16-bit image data. In that case the dataformat is
199 :ref:`V4L2_META_FMT_GENERIC_8 <v4l2-meta-fmt-g 199 :ref:`V4L2_META_FMT_GENERIC_8 <v4l2-meta-fmt-generic-8>`.
200 200
201 This format is little endian. 201 This format is little endian.
202 202
203 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_16. 203 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_16.**
204 Each cell is one byte. "M" denotes a byte of m 204 Each cell is one byte. "M" denotes a byte of metadata and "x" a byte of padding.
205 205
206 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{.8cm} 206 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{1.2cm}|p{.8cm}|
207 207
208 .. flat-table:: Sample 4x2 Metadata Frame 208 .. flat-table:: Sample 4x2 Metadata Frame
209 :header-rows: 0 209 :header-rows: 0
210 :stub-columns: 0 210 :stub-columns: 0
211 :widths: 12 8 8 8 8 8 8 8 8 211 :widths: 12 8 8 8 8 8 8 8 8
212 212
213 * - start + 0: 213 * - start + 0:
214 - M\ :sub:`00` 214 - M\ :sub:`00`
215 - x 215 - x
216 - M\ :sub:`10` 216 - M\ :sub:`10`
217 - x 217 - x
218 - M\ :sub:`20` 218 - M\ :sub:`20`
219 - x 219 - x
220 - M\ :sub:`30` 220 - M\ :sub:`30`
221 - x 221 - x
222 * - start + 8: 222 * - start + 8:
223 - M\ :sub:`01` 223 - M\ :sub:`01`
224 - x 224 - x
225 - M\ :sub:`11` 225 - M\ :sub:`11`
226 - x 226 - x
227 - M\ :sub:`21` 227 - M\ :sub:`21`
228 - x 228 - x
229 - M\ :sub:`31` 229 - M\ :sub:`31`
230 - x 230 - x
231 231
232 .. _v4l2-meta-fmt-generic-csi2-20: 232 .. _v4l2-meta-fmt-generic-csi2-20:
233 233
234 V4L2_META_FMT_GENERIC_CSI2_20 234 V4L2_META_FMT_GENERIC_CSI2_20
235 ----------------------------- 235 -----------------------------
236 236
237 V4L2_META_FMT_GENERIC_CSI2_20 contains 8-bit g 237 V4L2_META_FMT_GENERIC_CSI2_20 contains 8-bit generic metadata packed in 20-bit
238 Data Units, with alternating one or two paddin 238 Data Units, with alternating one or two padding bytes after every byte of
239 metadata. This format is typically used by CSI 239 metadata. This format is typically used by CSI-2 receivers with a source that
240 transmits MEDIA_BUS_FMT_META_20 and the CSI-2 240 transmits MEDIA_BUS_FMT_META_20 and the CSI-2 receiver writes the received data
241 to memory as-is. 241 to memory as-is.
242 242
243 The packing of the data follows the MIPI CSI-2 243 The packing of the data follows the MIPI CSI-2 specification and the padding of
244 the data is defined in the MIPI CCS specificat 244 the data is defined in the MIPI CCS specification.
245 245
246 Some devices support more efficient packing of 246 Some devices support more efficient packing of metadata in conjunction with
247 16-bit image data. In that case the dataformat 247 16-bit image data. In that case the dataformat is
248 :ref:`V4L2_META_FMT_GENERIC_CSI2_10 <v4l2-meta 248 :ref:`V4L2_META_FMT_GENERIC_CSI2_10 <v4l2-meta-fmt-generic-csi2-10>`.
249 249
250 This format is little endian. 250 This format is little endian.
251 251
252 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_20. 252 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_20.**
253 Each cell is one byte. "M" denotes a byte of m 253 Each cell is one byte. "M" denotes a byte of metadata and "x" a byte of padding.
254 254
255 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{.8cm} 255 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{.8cm}|
256 256
257 .. flat-table:: Sample 4x2 Metadata Frame 257 .. flat-table:: Sample 4x2 Metadata Frame
258 :header-rows: 0 258 :header-rows: 0
259 :stub-columns: 0 259 :stub-columns: 0
260 :widths: 12 8 8 8 8 8 8 8 8 8 8 260 :widths: 12 8 8 8 8 8 8 8 8 8 8
261 261
262 * - start + 0: 262 * - start + 0:
263 - M\ :sub:`00` 263 - M\ :sub:`00`
264 - x 264 - x
265 - M\ :sub:`10` 265 - M\ :sub:`10`
266 - x 266 - x
267 - x 267 - x
268 - M\ :sub:`20` 268 - M\ :sub:`20`
269 - x 269 - x
270 - M\ :sub:`30` 270 - M\ :sub:`30`
271 - x 271 - x
272 - x 272 - x
273 * - start + 10: 273 * - start + 10:
274 - M\ :sub:`01` 274 - M\ :sub:`01`
275 - x 275 - x
276 - M\ :sub:`11` 276 - M\ :sub:`11`
277 - x 277 - x
278 - x 278 - x
279 - M\ :sub:`21` 279 - M\ :sub:`21`
280 - x 280 - x
281 - M\ :sub:`31` 281 - M\ :sub:`31`
282 - x 282 - x
283 - x 283 - x
284 284
285 .. _v4l2-meta-fmt-generic-csi2-24: 285 .. _v4l2-meta-fmt-generic-csi2-24:
286 286
287 V4L2_META_FMT_GENERIC_CSI2_24 287 V4L2_META_FMT_GENERIC_CSI2_24
288 ----------------------------- 288 -----------------------------
289 289
290 V4L2_META_FMT_GENERIC_CSI2_24 contains 8-bit g 290 V4L2_META_FMT_GENERIC_CSI2_24 contains 8-bit generic metadata packed in 24-bit
291 Data Units, with two padding bytes after every 291 Data Units, with two padding bytes after every byte of metadata. This format is
292 typically used by CSI-2 receivers with a sourc 292 typically used by CSI-2 receivers with a source that transmits
293 MEDIA_BUS_FMT_META_24 and the CSI-2 receiver w 293 MEDIA_BUS_FMT_META_24 and the CSI-2 receiver writes the received data to memory
294 as-is. 294 as-is.
295 295
296 The packing of the data follows the MIPI CSI-2 296 The packing of the data follows the MIPI CSI-2 specification and the padding of
297 the data is defined in the MIPI CCS specificat 297 the data is defined in the MIPI CCS specification.
298 298
299 Some devices support more efficient packing of 299 Some devices support more efficient packing of metadata in conjunction with
300 16-bit image data. In that case the dataformat 300 16-bit image data. In that case the dataformat is
301 :ref:`V4L2_META_FMT_GENERIC_CSI2_12 <v4l2-meta 301 :ref:`V4L2_META_FMT_GENERIC_CSI2_12 <v4l2-meta-fmt-generic-csi2-12>`.
302 302
303 This format is little endian. 303 This format is little endian.
304 304
305 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_24. 305 **Byte Order Of V4L2_META_FMT_GENERIC_CSI2_24.**
306 Each cell is one byte. "M" denotes a byte of m 306 Each cell is one byte. "M" denotes a byte of metadata and "x" a byte of padding.
307 307
308 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{.8cm} 308 .. tabularcolumns:: |p{2.4cm}|p{1.2cm}|p{.8cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{.8cm}|p{1.2cm}|p{.8cm}|p{.8cm}|
309 309
310 .. flat-table:: Sample 4x2 Metadata Frame 310 .. flat-table:: Sample 4x2 Metadata Frame
311 :header-rows: 0 311 :header-rows: 0
312 :stub-columns: 0 312 :stub-columns: 0
313 :widths: 12 8 8 8 8 8 8 8 8 8 8 8 8 313 :widths: 12 8 8 8 8 8 8 8 8 8 8 8 8
314 314
315 * - start + 0: 315 * - start + 0:
316 - M\ :sub:`00` 316 - M\ :sub:`00`
317 - x 317 - x
318 - x 318 - x
319 - M\ :sub:`10` 319 - M\ :sub:`10`
320 - x 320 - x
321 - x 321 - x
322 - M\ :sub:`20` 322 - M\ :sub:`20`
323 - x 323 - x
324 - x 324 - x
325 - M\ :sub:`30` 325 - M\ :sub:`30`
326 - x 326 - x
327 - x 327 - x
328 * - start + 12: 328 * - start + 12:
329 - M\ :sub:`01` 329 - M\ :sub:`01`
330 - x 330 - x
331 - x 331 - x
332 - M\ :sub:`11` 332 - M\ :sub:`11`
333 - x 333 - x
334 - x 334 - x
335 - M\ :sub:`21` 335 - M\ :sub:`21`
336 - x 336 - x
337 - x 337 - x
338 - M\ :sub:`31` 338 - M\ :sub:`31`
339 - x 339 - x
340 - x 340 - x
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