1 .. SPDX-License-Identifier: GFDL-1.1-no-invari 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2 .. include:: <isonum.txt> 2 .. include:: <isonum.txt>
3 3
4 .. _v4l2spec: 4 .. _v4l2spec:
5 5
6 ############################ 6 ############################
7 Part I - Video for Linux API 7 Part I - Video for Linux API
8 ############################ 8 ############################
9 9
10 This part describes the Video for Linux API ve 10 This part describes the Video for Linux API version 2 (V4L2 API) specification.
11 11
12 **Revision 4.5** 12 **Revision 4.5**
13 13
14 .. toctree:: 14 .. toctree::
15 :caption: Table of Contents 15 :caption: Table of Contents
16 :numbered: 16 :numbered:
17 :maxdepth: 5 17 :maxdepth: 5
18 18
19 common 19 common
20 pixfmt 20 pixfmt
21 io 21 io
22 devices 22 devices
23 libv4l 23 libv4l
24 compat 24 compat
25 user-func 25 user-func
26 common-defs 26 common-defs
27 videodev 27 videodev
28 capture-example 28 capture-example
29 v4l2grab-example 29 v4l2grab-example
30 biblio 30 biblio
31 31
32 32
33 ********************** 33 **********************
34 Revision and Copyright 34 Revision and Copyright
35 ********************** 35 **********************
36 36
37 Authors, in alphabetical order: 37 Authors, in alphabetical order:
38 38
39 - Ailus, Sakari <sakari.ailus@iki.fi> 39 - Ailus, Sakari <sakari.ailus@iki.fi>
40 40
41 - Subdev selections API. 41 - Subdev selections API.
42 42
43 - Carvalho Chehab, Mauro <mchehab+samsung@kerne 43 - Carvalho Chehab, Mauro <mchehab+samsung@kernel.org>
44 44
45 - Documented libv4l, designed and added v4l2 45 - Documented libv4l, designed and added v4l2grab example, Remote Controller chapter.
46 46
47 - Dirks, Bill 47 - Dirks, Bill
48 48
49 - Original author of the V4L2 API and docume 49 - Original author of the V4L2 API and documentation.
50 50
51 - Figa, Tomasz <tfiga@chromium.org> 51 - Figa, Tomasz <tfiga@chromium.org>
52 52
53 - Documented the memory-to-memory decoder in 53 - Documented the memory-to-memory decoder interface.
54 - Documented the memory-to-memory encoder in 54 - Documented the memory-to-memory encoder interface.
55 55
56 - H Schimek, Michael <mschimek@gmx.at> 56 - H Schimek, Michael <mschimek@gmx.at>
57 57
58 - Original author of the V4L2 API and docume 58 - Original author of the V4L2 API and documentation.
59 59
60 - Karicheri, Muralidharan <m-karicheri2@ti.com> 60 - Karicheri, Muralidharan <m-karicheri2@ti.com>
61 61
62 - Documented the Digital Video timings API. 62 - Documented the Digital Video timings API.
63 63
64 - Osciak, Pawel <posciak@chromium.org> 64 - Osciak, Pawel <posciak@chromium.org>
65 65
66 - Documented the memory-to-memory decoder in 66 - Documented the memory-to-memory decoder interface.
67 - Documented the memory-to-memory encoder in 67 - Documented the memory-to-memory encoder interface.
68 68
69 - Osciak, Pawel <pawel@osciak.com> 69 - Osciak, Pawel <pawel@osciak.com>
70 70
71 - Designed and documented the multi-planar A 71 - Designed and documented the multi-planar API.
72 72
73 - Palosaari, Antti <crope@iki.fi> 73 - Palosaari, Antti <crope@iki.fi>
74 74
75 - SDR API. 75 - SDR API.
76 76
77 - Ribalda, Ricardo 77 - Ribalda, Ricardo
78 78
79 - Introduce HSV formats and other minor chan 79 - Introduce HSV formats and other minor changes.
80 80
81 - Rubli, Martin 81 - Rubli, Martin
82 82
83 - Designed and documented the VIDIOC_ENUM_FR 83 - Designed and documented the VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS ioctls.
84 84
85 - Walls, Andy <awalls@md.metrocast.net> 85 - Walls, Andy <awalls@md.metrocast.net>
86 86
87 - Documented the fielded V4L2_MPEG_STREAM_VB 87 - Documented the fielded V4L2_MPEG_STREAM_VBI_FMT_IVTV MPEG stream embedded, sliced VBI data format in this specification.
88 88
89 - Verkuil, Hans <hverkuil@xs4all.nl> 89 - Verkuil, Hans <hverkuil@xs4all.nl>
90 90
91 - Designed and documented the VIDIOC_LOG_STA 91 - Designed and documented the VIDIOC_LOG_STATUS ioctl, the extended control ioctls, major parts of the sliced VBI API, the MPEG encoder and decoder APIs and the DV Timings API.
92 92
93 **Copyright** |copy| 1999-2018: Bill Dirks, Mi 93 **Copyright** |copy| 1999-2018: Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab, Pawel Osciak, Sakari Ailus & Antti Palosaari, Tomasz Figa
94 94
95 Except when explicitly stated as GPL, programm 95 Except when explicitly stated as GPL, programming examples within this
96 part can be used and distributed without restr 96 part can be used and distributed without restrictions.
97 97
98 **************** 98 ****************
99 Revision History 99 Revision History
100 **************** 100 ****************
101 101
102 :revision: 4.10 / 2016-07-15 (*rr*) 102 :revision: 4.10 / 2016-07-15 (*rr*)
103 103
104 Introduce HSV formats. 104 Introduce HSV formats.
105 105
106 106
107 :revision: 4.5 / 2015-10-29 (*rr*) 107 :revision: 4.5 / 2015-10-29 (*rr*)
108 108
109 Extend VIDIOC_G_EXT_CTRLS;. Replace ctrl_class 109 Extend VIDIOC_G_EXT_CTRLS;. Replace ctrl_class with a new union with
110 ctrl_class and which. Which is used to select 110 ctrl_class and which. Which is used to select the current value of the
111 control or the default value. 111 control or the default value.
112 112
113 113
114 :revision: 4.4 / 2015-05-26 (*ap*) 114 :revision: 4.4 / 2015-05-26 (*ap*)
115 115
116 Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR. Adde 116 Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR. Added
117 V4L2_CID_RF_TUNER_RF_GAIN control. Added trans 117 V4L2_CID_RF_TUNER_RF_GAIN control. Added transmitter support for
118 Software Defined Radio (SDR) Interface. 118 Software Defined Radio (SDR) Interface.
119 119
120 120
121 :revision: 4.1 / 2015-02-13 (*mcc*) 121 :revision: 4.1 / 2015-02-13 (*mcc*)
122 122
123 Fix documentation for media controller device 123 Fix documentation for media controller device nodes and add support for
124 DVB device nodes. Add support for Tuner sub-de 124 DVB device nodes. Add support for Tuner sub-device.
125 125
126 126
127 :revision: 3.19 / 2014-12-05 (*hv*) 127 :revision: 3.19 / 2014-12-05 (*hv*)
128 128
129 Rewrote Colorspace chapter, added new enum 129 Rewrote Colorspace chapter, added new enum
130 :c:type:`v4l2_ycbcr_encoding` and enum 130 :c:type:`v4l2_ycbcr_encoding` and enum
131 :c:type:`v4l2_quantization` fields to struct 131 :c:type:`v4l2_quantization` fields to struct
132 :c:type:`v4l2_pix_format`, struct 132 :c:type:`v4l2_pix_format`, struct
133 :c:type:`v4l2_pix_format_mplane` and struct 133 :c:type:`v4l2_pix_format_mplane` and struct
134 :c:type:`v4l2_mbus_framefmt`. 134 :c:type:`v4l2_mbus_framefmt`.
135 135
136 136
137 :revision: 3.17 / 2014-08-04 (*lp, hv*) 137 :revision: 3.17 / 2014-08-04 (*lp, hv*)
138 138
139 Extended struct :c:type:`v4l2_pix_format`. Add 139 Extended struct :c:type:`v4l2_pix_format`. Added
140 format flags. Added compound control types and 140 format flags. Added compound control types and VIDIOC_QUERY_EXT_CTRL.
141 141
142 142
143 :revision: 3.15 / 2014-02-03 (*hv, ap*) 143 :revision: 3.15 / 2014-02-03 (*hv, ap*)
144 144
145 Update several sections of "Common API Element 145 Update several sections of "Common API Elements": "Opening and Closing
146 Devices" "Querying Capabilities", "Application 146 Devices" "Querying Capabilities", "Application Priority", "Video Inputs
147 and Outputs", "Audio Inputs and Outputs" "Tune 147 and Outputs", "Audio Inputs and Outputs" "Tuners and Modulators", "Video
148 Standards" and "Digital Video (DV) Timings". A 148 Standards" and "Digital Video (DV) Timings". Added SDR API.
149 149
150 150
151 :revision: 3.14 / 2013-11-25 (*rr*) 151 :revision: 3.14 / 2013-11-25 (*rr*)
152 152
153 Set width and height as unsigned on v4l2_rect. 153 Set width and height as unsigned on v4l2_rect.
154 154
155 155
156 :revision: 3.11 / 2013-05-26 (*hv*) 156 :revision: 3.11 / 2013-05-26 (*hv*)
157 157
158 Remove obsolete VIDIOC_DBG_G_CHIP_IDENT ioctl. 158 Remove obsolete VIDIOC_DBG_G_CHIP_IDENT ioctl.
159 159
160 160
161 :revision: 3.10 / 2013-03-25 (*hv*) 161 :revision: 3.10 / 2013-03-25 (*hv*)
162 162
163 Remove obsolete and unused DV_PRESET ioctls: V 163 Remove obsolete and unused DV_PRESET ioctls: VIDIOC_G_DV_PRESET,
164 VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and 164 VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and
165 VIDIOC_ENUM_DV_PRESET. Remove the related v4l2 165 VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output
166 capability flags V4L2_IN_CAP_PRESETS and V4L2_ 166 capability flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS.
167 Added VIDIOC_DBG_G_CHIP_INFO. 167 Added VIDIOC_DBG_G_CHIP_INFO.
168 168
169 169
170 :revision: 3.9 / 2012-12-03 (*sa, sn*) 170 :revision: 3.9 / 2012-12-03 (*sa, sn*)
171 171
172 Added timestamp types to v4l2_buffer. Added 172 Added timestamp types to v4l2_buffer. Added
173 V4L2_EVENT_CTRL_CH_RANGE control event changes 173 V4L2_EVENT_CTRL_CH_RANGE control event changes flag.
174 174
175 175
176 :revision: 3.6 / 2012-07-02 (*hv*) 176 :revision: 3.6 / 2012-07-02 (*hv*)
177 177
178 Added VIDIOC_ENUM_FREQ_BANDS. 178 Added VIDIOC_ENUM_FREQ_BANDS.
179 179
180 180
181 :revision: 3.5 / 2012-05-07 (*sa, sn, hv*) 181 :revision: 3.5 / 2012-05-07 (*sa, sn, hv*)
182 182
183 Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 sub 183 Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev selections API.
184 Improved the description of V4L2_CID_COLORFX c 184 Improved the description of V4L2_CID_COLORFX control, added
185 V4L2_CID_COLORFX_CBCR control. Added camera co 185 V4L2_CID_COLORFX_CBCR control. Added camera controls
186 V4L2_CID_AUTO_EXPOSURE_BIAS, 186 V4L2_CID_AUTO_EXPOSURE_BIAS,
187 V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE, 187 V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
188 V4L2_CID_IMAGE_STABILIZATION, V4L2_CID_ISO_SEN 188 V4L2_CID_IMAGE_STABILIZATION, V4L2_CID_ISO_SENSITIVITY,
189 V4L2_CID_ISO_SENSITIVITY_AUTO, V4L2_CID_EXPOSU 189 V4L2_CID_ISO_SENSITIVITY_AUTO, V4L2_CID_EXPOSURE_METERING,
190 V4L2_CID_SCENE_MODE, V4L2_CID_3A_LOCK, 190 V4L2_CID_SCENE_MODE, V4L2_CID_3A_LOCK,
191 V4L2_CID_AUTO_FOCUS_START, V4L2_CID_AUTO_FOCUS 191 V4L2_CID_AUTO_FOCUS_START, V4L2_CID_AUTO_FOCUS_STOP,
192 V4L2_CID_AUTO_FOCUS_STATUS and V4L2_CID_AUTO_F 192 V4L2_CID_AUTO_FOCUS_STATUS and V4L2_CID_AUTO_FOCUS_RANGE. Added
193 VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMING 193 VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and
194 VIDIOC_DV_TIMINGS_CAP. 194 VIDIOC_DV_TIMINGS_CAP.
195 195
196 196
197 :revision: 3.4 / 2012-01-25 (*sn*) 197 :revision: 3.4 / 2012-01-25 (*sn*)
198 198
199 Added :ref:`JPEG compression control class. <j 199 Added :ref:`JPEG compression control class. <jpeg-controls>`
200 200
201 201
202 :revision: 3.3 / 2012-01-11 (*hv*) 202 :revision: 3.3 / 2012-01-11 (*hv*)
203 203
204 Added device_caps field to struct v4l2_capabil 204 Added device_caps field to struct v4l2_capabilities.
205 205
206 206
207 :revision: 3.2 / 2011-08-26 (*hv*) 207 :revision: 3.2 / 2011-08-26 (*hv*)
208 208
209 Added V4L2_CTRL_FLAG_VOLATILE. 209 Added V4L2_CTRL_FLAG_VOLATILE.
210 210
211 211
212 :revision: 3.1 / 2011-06-27 (*mcc, po, hv*) 212 :revision: 3.1 / 2011-06-27 (*mcc, po, hv*)
213 213
214 Documented that VIDIOC_QUERYCAP now returns a 214 Documented that VIDIOC_QUERYCAP now returns a per-subsystem version
215 instead of a per-driver one. Standardize an er 215 instead of a per-driver one. Standardize an error code for invalid
216 ioctl. Added V4L2_CTRL_TYPE_BITMASK. 216 ioctl. Added V4L2_CTRL_TYPE_BITMASK.
217 217
218 218
219 :revision: 2.6.39 / 2011-03-01 (*mcc, po*) 219 :revision: 2.6.39 / 2011-03-01 (*mcc, po*)
220 220
221 Removed VIDIOC_*_OLD from videodev2.h header a 221 Removed VIDIOC_*_OLD from videodev2.h header and update it to reflect
222 latest changes. Added the :ref:`multi-planar A 222 latest changes. Added the :ref:`multi-planar API <planar-apis>`.
223 223
224 224
225 :revision: 2.6.37 / 2010-08-06 (*hv*) 225 :revision: 2.6.37 / 2010-08-06 (*hv*)
226 226
227 Removed obsolete vtx (videotext) API. 227 Removed obsolete vtx (videotext) API.
228 228
229 229
230 :revision: 2.6.33 / 2009-12-03 (*mk*) 230 :revision: 2.6.33 / 2009-12-03 (*mk*)
231 231
232 Added documentation for the Digital Video timi 232 Added documentation for the Digital Video timings API.
233 233
234 234
235 :revision: 2.6.32 / 2009-08-31 (*mcc*) 235 :revision: 2.6.32 / 2009-08-31 (*mcc*)
236 236
237 Now, revisions will match the kernel version w 237 Now, revisions will match the kernel version where the V4L2 API changes
238 will be used by the Linux Kernel. Also added R 238 will be used by the Linux Kernel. Also added Remote Controller chapter.
239 239
240 240
241 :revision: 0.29 / 2009-08-26 (*ev*) 241 :revision: 0.29 / 2009-08-26 (*ev*)
242 242
243 Added documentation for string controls and fo 243 Added documentation for string controls and for FM Transmitter controls.
244 244
245 245
246 :revision: 0.28 / 2009-08-26 (*gl*) 246 :revision: 0.28 / 2009-08-26 (*gl*)
247 247
248 Added V4L2_CID_BAND_STOP_FILTER documentation. 248 Added V4L2_CID_BAND_STOP_FILTER documentation.
249 249
250 250
251 :revision: 0.27 / 2009-08-15 (*mcc*) 251 :revision: 0.27 / 2009-08-15 (*mcc*)
252 252
253 Added libv4l and Remote Controller documentati 253 Added libv4l and Remote Controller documentation; added v4l2grab and
254 keytable application examples. 254 keytable application examples.
255 255
256 256
257 :revision: 0.26 / 2009-07-23 (*hv*) 257 :revision: 0.26 / 2009-07-23 (*hv*)
258 258
259 Finalized the RDS capture API. Added modulator 259 Finalized the RDS capture API. Added modulator and RDS encoder
260 capabilities. Added support for string control 260 capabilities. Added support for string controls.
261 261
262 262
263 :revision: 0.25 / 2009-01-18 (*hv*) 263 :revision: 0.25 / 2009-01-18 (*hv*)
264 264
265 Added pixel formats VYUY, NV16 and NV61, and c 265 Added pixel formats VYUY, NV16 and NV61, and changed the debug ioctls
266 VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_ 266 VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_IDENT. Added camera
267 controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM 267 controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM_RELATIVE,
268 V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY. 268 V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY.
269 269
270 270
271 :revision: 0.24 / 2008-03-04 (*mhs*) 271 :revision: 0.24 / 2008-03-04 (*mhs*)
272 272
273 Added pixel formats Y16 and SBGGR16, new contr 273 Added pixel formats Y16 and SBGGR16, new controls and a camera controls
274 class. Removed VIDIOC_G/S_MPEGCOMP. 274 class. Removed VIDIOC_G/S_MPEGCOMP.
275 275
276 276
277 :revision: 0.23 / 2007-08-30 (*mhs*) 277 :revision: 0.23 / 2007-08-30 (*mhs*)
278 278
279 Fixed a typo in VIDIOC_DBG_G/S_REGISTER. Clari 279 Fixed a typo in VIDIOC_DBG_G/S_REGISTER. Clarified the byte order of
280 packed pixel formats. 280 packed pixel formats.
281 281
282 282
283 :revision: 0.22 / 2007-08-29 (*mhs*) 283 :revision: 0.22 / 2007-08-29 (*mhs*)
284 284
285 Added the Video Output Overlay interface, new 285 Added the Video Output Overlay interface, new MPEG controls,
286 V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERL 286 V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT,
287 VIDIOC_DBG_G/S_REGISTER, VIDIOC\_(TRY\_)ENCODE 287 VIDIOC_DBG_G/S_REGISTER, VIDIOC\_(TRY\_)ENCODER_CMD,
288 VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new p 288 VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new pixel formats.
289 Clarifications in the cropping chapter, about 289 Clarifications in the cropping chapter, about RGB pixel formats, the
290 mmap(), poll(), select(), read() and write() f 290 mmap(), poll(), select(), read() and write() functions. Typographical
291 fixes. 291 fixes.
292 292
293 293
294 :revision: 0.21 / 2006-12-19 (*mhs*) 294 :revision: 0.21 / 2006-12-19 (*mhs*)
295 295
296 Fixed a link in the VIDIOC_G_EXT_CTRLS section 296 Fixed a link in the VIDIOC_G_EXT_CTRLS section.
297 297
298 298
299 :revision: 0.20 / 2006-11-24 (*mhs*) 299 :revision: 0.20 / 2006-11-24 (*mhs*)
300 300
301 Clarified the purpose of the audioset field in 301 Clarified the purpose of the audioset field in struct v4l2_input and
302 v4l2_output. 302 v4l2_output.
303 303
304 304
305 :revision: 0.19 / 2006-10-19 (*mhs*) 305 :revision: 0.19 / 2006-10-19 (*mhs*)
306 306
307 Documented V4L2_PIX_FMT_RGB444. 307 Documented V4L2_PIX_FMT_RGB444.
308 308
309 309
310 :revision: 0.18 / 2006-10-18 (*mhs*) 310 :revision: 0.18 / 2006-10-18 (*mhs*)
311 311
312 Added the description of extended controls by 312 Added the description of extended controls by Hans Verkuil. Linked
313 V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE 313 V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE.
314 314
315 315
316 :revision: 0.17 / 2006-10-12 (*mhs*) 316 :revision: 0.17 / 2006-10-12 (*mhs*)
317 317
318 Corrected V4L2_PIX_FMT_HM12 description. 318 Corrected V4L2_PIX_FMT_HM12 description.
319 319
320 320
321 :revision: 0.16 / 2006-10-08 (*mhs*) 321 :revision: 0.16 / 2006-10-08 (*mhs*)
322 322
323 VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEIN 323 VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS are now part
324 of the API. 324 of the API.
325 325
326 326
327 :revision: 0.15 / 2006-09-23 (*mhs*) 327 :revision: 0.15 / 2006-09-23 (*mhs*)
328 328
329 Cleaned up the bibliography, added BT.653 and 329 Cleaned up the bibliography, added BT.653 and BT.1119.
330 capture.c/start_capturing() for user pointer I 330 capture.c/start_capturing() for user pointer I/O did not initialize the
331 buffer index. Documented the V4L MPEG and MJPE 331 buffer index. Documented the V4L MPEG and MJPEG VID_TYPEs and
332 V4L2_PIX_FMT_SBGGR8. Updated the list of reser 332 V4L2_PIX_FMT_SBGGR8. Updated the list of reserved pixel formats. See
333 the history chapter for API changes. 333 the history chapter for API changes.
334 334
335 335
336 :revision: 0.14 / 2006-09-14 (*mr*) 336 :revision: 0.14 / 2006-09-14 (*mr*)
337 337
338 Added VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_F 338 Added VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS proposal
339 for frame format enumeration of digital device 339 for frame format enumeration of digital devices.
340 340
341 341
342 :revision: 0.13 / 2006-04-07 (*mhs*) 342 :revision: 0.13 / 2006-04-07 (*mhs*)
343 343
344 Corrected the description of struct v4l2_windo 344 Corrected the description of struct v4l2_window clips. New V4L2_STD\_
345 and V4L2_TUNER_MODE_LANG1_LANG2 defines. 345 and V4L2_TUNER_MODE_LANG1_LANG2 defines.
346 346
347 347
348 :revision: 0.12 / 2006-02-03 (*mhs*) 348 :revision: 0.12 / 2006-02-03 (*mhs*)
349 349
350 Corrected the description of struct v4l2_captu 350 Corrected the description of struct v4l2_captureparm and
351 v4l2_outputparm. 351 v4l2_outputparm.
352 352
353 353
354 :revision: 0.11 / 2006-01-27 (*mhs*) 354 :revision: 0.11 / 2006-01-27 (*mhs*)
355 355
356 Improved the description of struct v4l2_tuner. 356 Improved the description of struct v4l2_tuner.
357 357
358 358
359 :revision: 0.10 / 2006-01-10 (*mhs*) 359 :revision: 0.10 / 2006-01-10 (*mhs*)
360 360
361 VIDIOC_G_INPUT and VIDIOC_S_PARM clarification 361 VIDIOC_G_INPUT and VIDIOC_S_PARM clarifications.
362 362
363 363
364 :revision: 0.9 / 2005-11-27 (*mhs*) 364 :revision: 0.9 / 2005-11-27 (*mhs*)
365 365
366 Improved the 525 line numbering diagram. Hans 366 Improved the 525 line numbering diagram. Hans Verkuil and I rewrote the
367 sliced VBI section. He also contributed a VIDI 367 sliced VBI section. He also contributed a VIDIOC_LOG_STATUS page.
368 Fixed VIDIOC_S_STD call in the video standard 368 Fixed VIDIOC_S_STD call in the video standard selection example.
369 Various updates. 369 Various updates.
370 370
371 371
372 :revision: 0.8 / 2004-10-04 (*mhs*) 372 :revision: 0.8 / 2004-10-04 (*mhs*)
373 373
374 Somehow a piece of junk slipped into the captu 374 Somehow a piece of junk slipped into the capture example, removed.
375 375
376 376
377 :revision: 0.7 / 2004-09-19 (*mhs*) 377 :revision: 0.7 / 2004-09-19 (*mhs*)
378 378
379 Fixed video standard selection, control enumer 379 Fixed video standard selection, control enumeration, downscaling and
380 aspect example. Added read and user pointer i/ 380 aspect example. Added read and user pointer i/o to video capture
381 example. 381 example.
382 382
383 383
384 :revision: 0.6 / 2004-08-01 (*mhs*) 384 :revision: 0.6 / 2004-08-01 (*mhs*)
385 385
386 v4l2_buffer changes, added video capture examp 386 v4l2_buffer changes, added video capture example, various corrections.
387 387
388 388
389 :revision: 0.5 / 2003-11-05 (*mhs*) 389 :revision: 0.5 / 2003-11-05 (*mhs*)
390 390
391 Pixel format erratum. 391 Pixel format erratum.
392 392
393 393
394 :revision: 0.4 / 2003-09-17 (*mhs*) 394 :revision: 0.4 / 2003-09-17 (*mhs*)
395 395
396 Corrected source and Makefile to generate a PD 396 Corrected source and Makefile to generate a PDF. SGML fixes. Added
397 latest API changes. Closed gaps in the history 397 latest API changes. Closed gaps in the history chapter.
398 398
399 399
400 :revision: 0.3 / 2003-02-05 (*mhs*) 400 :revision: 0.3 / 2003-02-05 (*mhs*)
401 401
402 Another draft, more corrections. 402 Another draft, more corrections.
403 403
404 404
405 :revision: 0.2 / 2003-01-15 (*mhs*) 405 :revision: 0.2 / 2003-01-15 (*mhs*)
406 406
407 Second draft, with corrections pointed out by 407 Second draft, with corrections pointed out by Gerd Knorr.
408 408
409 409
410 :revision: 0.1 / 2002-12-01 (*mhs*) 410 :revision: 0.1 / 2002-12-01 (*mhs*)
411 411
412 First draft, based on documentation by Bill Di 412 First draft, based on documentation by Bill Dirks and discussions on the
413 V4L mailing list. 413 V4L mailing list.
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