1 /*****************************************************************************
2 * v4l2.c : Video4Linux2 input module for VLC
3 *****************************************************************************
4 * Copyright (C) 2002-2009 the VideoLAN team
5 * Copyright (C) 2011-2012 RĂ©mi Denis-Courmont
7 * Authors: Benjamin Pracht <bigben at videolan dot org>
8 * Richard Hosking <richard at hovis dot net>
9 * Antoine Cellerier <dionoea at videolan d.t org>
10 * Dennis Lou <dlou99 at yahoo dot com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Lesser General Public License as published by
14 * the Free Software Foundation; either version 2.1 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Lesser General Public License for more details.
22 * You should have received a copy of the GNU Lesser General Public License
23 * along with this program; if not, write to the Free Software Foundation,
24 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
40 #define DEVICE_TEXT N_( "Device" )
41 #define DEVICE_LONGTEXT N_("Video device node." )
42 #define STANDARD_TEXT N_( "Standard" )
43 #define STANDARD_LONGTEXT N_( \
44 "Video standard (Default, SECAM, PAL, or NTSC)." )
45 #define CHROMA_TEXT N_("Video input chroma format")
46 #define CHROMA_LONGTEXT N_( \
47 "Force the Video4Linux2 video device to use a specific chroma format " \
48 "(eg. I420 or I422 for raw images, MJPG for M-JPEG compressed input) " \
49 "(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
50 "I41N, I422, I420, I411, I410, MJPG)")
51 #define INPUT_TEXT N_( "Input" )
52 #define INPUT_LONGTEXT N_( \
53 "Input of the card to use (see debug)." )
54 #define AUDIO_INPUT_TEXT N_( "Audio input" )
55 #define AUDIO_INPUT_LONGTEXT N_( \
56 "Audio input of the card to use (see debug)." )
57 #define WIDTH_TEXT N_( "Width" )
58 #define HEIGHT_TEXT N_( "Height" )
59 #define SIZE_LONGTEXT N_( \
60 "The specified pixel resolution is forced " \
61 "(if both width and height are strictly positive)." )
62 /*#define FPS_TEXT N_( "Frame rate" )
63 #define FPS_LONGTEXT N_( "Maximum frame rate to use (0 = no limits)." )*/
65 #define CTRL_RESET_TEXT N_( "Reset controls" )
66 #define CTRL_RESET_LONGTEXT N_( "Reset controls to defaults." )
67 #define BRIGHTNESS_TEXT N_( "Brightness" )
68 #define BRIGHTNESS_LONGTEXT N_( "Picture brightness or black level." )
69 #define BRIGHTNESS_AUTO_TEXT N_( "Automatic brightness" )
70 #define BRIGHTNESS_AUTO_LONGTEXT N_( \
71 "Automatically adjust the picture brightness." )
72 #define CONTRAST_TEXT N_( "Contrast" )
73 #define CONTRAST_LONGTEXT N_( "Picture contrast or luma gain." )
74 #define SATURATION_TEXT N_( "Saturation" )
75 #define SATURATION_LONGTEXT N_( "Picture saturation or chroma gain." )
76 #define HUE_TEXT N_( "Hue" )
77 #define HUE_LONGTEXT N_( "Hue or color balance." )
78 #define HUE_AUTO_TEXT N_( "Automatic hue" )
79 #define HUE_AUTO_LONGTEXT N_( \
80 "Automatically adjust the picture hue." )
81 #define WHITE_BALANCE_TEMP_TEXT N_( "White balance temperature (K)" )
82 #define WHITE_BALANCE_TEMP_LONGTEXT N_( \
83 "White balance temperature as a color temperation in Kelvin " \
84 "(2800 is minimum incandescence, 6500 is maximum daylight)." )
85 #define AUTOWHITEBALANCE_TEXT N_( "Automatic white balance" )
86 #define AUTOWHITEBALANCE_LONGTEXT N_( \
87 "Automatically adjust the picture white balance." )
88 #define REDBALANCE_TEXT N_( "Red balance" )
89 #define REDBALANCE_LONGTEXT N_( \
90 "Red chroma balance." )
91 #define BLUEBALANCE_TEXT N_( "Blue balance" )
92 #define BLUEBALANCE_LONGTEXT N_( \
93 "Blue chroma balance." )
94 #define GAMMA_TEXT N_( "Gamma" )
95 #define GAMMA_LONGTEXT N_( \
97 #define AUTOGAIN_TEXT N_( "Automatic gain" )
98 #define AUTOGAIN_LONGTEXT N_( \
99 "Automatically set the video gain." )
100 #define GAIN_TEXT N_( "Gain" )
101 #define GAIN_LONGTEXT N_( \
103 #define SHARPNESS_TEXT N_( "Sharpness" )
104 #define SHARPNESS_LONGTEXT N_( "Sharpness filter adjust." )
105 #define CHROMA_GAIN_TEXT N_( "Chroma gain" )
106 #define CHROMA_GAIN_LONGTEXT N_( "Chroma gain control." )
107 #define CHROMA_GAIN_AUTO_TEXT N_( "Automatic chroma gain" )
108 #define CHROMA_GAIN_AUTO_LONGTEXT N_( \
109 "Automatically control the chroma gain." )
110 #define POWER_FREQ_TEXT N_( "Power line frequency" )
111 #define POWER_FREQ_LONGTEXT N_( \
112 "Power line frequency anti-flicker filter." )
113 static const int power_freq_vlc[] = { -1,
114 V4L2_CID_POWER_LINE_FREQUENCY_DISABLED,
115 V4L2_CID_POWER_LINE_FREQUENCY_50HZ,
116 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
117 V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
119 static const char *const power_freq_user[] = { N_("Unspecified"),
120 N_("Off"), N_("50 Hz"), N_("60 Hz"), N_("Automatic"),
122 #define BKLT_COMPENSATE_TEXT N_( "Backlight compensation" )
123 #define BKLT_COMPENSATE_LONGTEXT N_( "Backlight compensation." )
124 #define BAND_STOP_FILTER_TEXT N_( "Band-stop filter" )
125 #define BAND_STOP_FILTER_LONGTEXT N_( \
126 "Cut a light band induced by fluorescent lighting (unit undocumented)." )
127 #define HFLIP_TEXT N_( "Horizontal flip" )
128 #define HFLIP_LONGTEXT N_( \
129 "Flip the picture horizontally." )
130 #define VFLIP_TEXT N_( "Vertical flip" )
131 #define VFLIP_LONGTEXT N_( \
132 "Flip the picture vertically." )
133 #define ROTATE_TEXT N_( "Rotate (degrees)" )
134 #define ROTATE_LONGTEXT N_( "Picture rotation angle (in degrees)." )
135 #define COLOR_KILLER_TEXT N_( "Color killer" )
136 #define COLOR_KILLER_LONGTEXT N_( \
137 "Enable the color killer, i.e. switch to black & white picture " \
138 "whenever the signal is weak." )
139 #define COLOR_EFFECT_TEXT N_( "Color effect" )
140 #define COLOR_EFFECT_LONGTEXT N_( "Select a color effect." )
141 static const int colorfx_vlc[] = { -1, V4L2_COLORFX_NONE,
142 V4L2_COLORFX_BW, V4L2_COLORFX_SEPIA, V4L2_COLORFX_NEGATIVE,
143 V4L2_COLORFX_EMBOSS, V4L2_COLORFX_SKETCH, V4L2_COLORFX_SKY_BLUE,
144 V4L2_COLORFX_GRASS_GREEN, V4L2_COLORFX_SKIN_WHITEN, V4L2_COLORFX_VIVID,
146 static const char *const colorfx_user[] = { N_("Unspecified"), N_("None"),
147 N_("Black & white"), N_("Sepia"), N_("Negative"),
148 N_("Emboss"), N_("Sketch"), N_("Sky blue"),
149 N_("Grass green"), N_("Skin whiten"), N_("Vivid"),
152 #define AUDIO_VOLUME_TEXT N_( "Audio volume" )
153 #define AUDIO_VOLUME_LONGTEXT N_( \
154 "Volume of the audio input." )
155 #define AUDIO_BALANCE_TEXT N_( "Audio balance" )
156 #define AUDIO_BALANCE_LONGTEXT N_( \
157 "Balance of the audio input." )
158 #define AUDIO_BASS_TEXT N_( "Bass level" )
159 #define AUDIO_BASS_LONGTEXT N_( \
160 "Bass adjustment of the audio input." )
161 #define AUDIO_TREBLE_TEXT N_( "Treble level" )
162 #define AUDIO_TREBLE_LONGTEXT N_( \
163 "Treble adjustment of the audio input." )
164 #define AUDIO_MUTE_TEXT N_( "Mute" )
165 #define AUDIO_MUTE_LONGTEXT N_( \
167 #define AUDIO_LOUDNESS_TEXT N_( "Loudness mode" )
168 #define AUDIO_LOUDNESS_LONGTEXT N_( \
169 "Loudness mode a.k.a. bass boost." )
171 #define S_CTRLS_TEXT N_("v4l2 driver controls")
172 #define S_CTRLS_LONGTEXT N_( \
173 "Set the v4l2 driver controls to the values specified using a comma " \
174 "separated list optionally encapsulated by curly braces " \
175 "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
176 "To list available controls, increase verbosity (-vvv) " \
177 "or use the v4l2-ctl application." )
179 #define TUNER_TEXT N_("Tuner id")
180 #define TUNER_LONGTEXT N_( \
181 "Tuner id (see debug output)." )
182 #define FREQUENCY_TEXT N_("Frequency")
183 #define FREQUENCY_LONGTEXT N_( \
184 "Tuner frequency in Hz or kHz (see debug output)" )
185 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
186 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
187 "Tuner audio mono/stereo and track selection." )
189 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
190 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
192 static const int tristate_vlc[] = { -1, 0, 1 };
193 static const char *const tristate_user[] = {
194 N_("Unspecified"), N_("Off"), N_("On") };
196 static const v4l2_std_id standards_v4l2[] = { V4L2_STD_UNKNOWN, V4L2_STD_ALL,
197 V4L2_STD_PAL, V4L2_STD_PAL_BG, V4L2_STD_PAL_DK,
199 V4L2_STD_SECAM, V4L2_STD_SECAM_DK,
200 V4L2_STD_MTS, V4L2_STD_525_60, V4L2_STD_625_50,
203 V4L2_STD_B, V4L2_STD_G, V4L2_STD_H, V4L2_STD_L,
204 V4L2_STD_GH, V4L2_STD_DK, V4L2_STD_BG, V4L2_STD_MN,
206 V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
207 V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
208 V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
209 V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP,V4L2_STD_NTSC_443, V4L2_STD_NTSC_M_KR,
210 V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G, V4L2_STD_SECAM_H,
211 V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1, V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
212 V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
214 static const char *const standards_vlc[] = { "", "ALL",
215 /* Pseudo standards */
216 "PAL", "PAL_BG", "PAL_DK",
219 "MTS", "525_60", "625_50",
222 /* Chroma-agnostic ITU standards (PAL/NTSC or PAL/SECAM) */
224 "GH", "DK", "BG", "MN",
226 /* Individual standards */
227 "PAL_B", "PAL_B1", "PAL_G", "PAL_H",
228 "PAL_I", "PAL_D", "PAL_D1", "PAL_K",
229 "PAL_M", "PAL_N", "PAL_Nc", "PAL_60",
230 "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR",
231 "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H",
232 "SECAM_K", "SECAM_K1", "SECAM_L", "SECAM_LC",
233 "ATSC_8_VSB", "ATSC_16_VSB",
235 static const char *const standards_user[] = { N_("Undefined"), N_("All"),
236 "PAL", "PAL B/G", "PAL D/K",
238 "SECAM", "SECAM D/K",
239 N_("Multichannel television sound (MTS)"),
240 N_("525 lines / 60 Hz"), N_("625 lines / 50 Hz"),
243 "PAL/SECAM B", "PAL/SECAM G", "PAL/SECAM H", "PAL/SECAM L",
244 "PAL/SECAM G/H", "PAL/SECAM D/K", "PAL/SECAM B/G", "PAL/NTSC M/N",
246 "PAL B", "PAL B1", "PAL G", "PAL H",
247 "PAL I", "PAL D", "PAL D1", "PAL K",
248 "PAL M", "PAL N", N_("PAL N Argentina"), "PAL 60",
249 "NTSC M", N_("NTSC M Japan"), "NTSC 443", N_("NTSC M South Korea"),
250 "SECAM B", "SECAM D", "SECAM G", "SECAM H",
251 "SECAM K", "SECAM K1", "SECAM L", "SECAM L/C",
252 "ATSC 8-VSB", "ATSC 16-VSB",
255 static const int i_tuner_audio_modes_list[] = {
256 V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
257 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2, V4L2_TUNER_MODE_LANG1_LANG2
259 static const char *const psz_tuner_audio_modes_list_text[] = {
262 N_("Primary language"),
263 N_("Secondary language or program"),
268 set_shortname( N_("Video4Linux2") )
269 set_description( N_("Video4Linux2 input") )
270 set_category( CAT_INPUT )
271 set_subcategory( SUBCAT_INPUT_ACCESS )
273 set_section( N_( "Video input" ), NULL )
274 add_loadfile( CFG_PREFIX "dev", "/dev/video0",
275 DEVICE_TEXT, DEVICE_LONGTEXT, false )
277 add_string( CFG_PREFIX "standard", "",
278 STANDARD_TEXT, STANDARD_LONGTEXT, false )
279 change_string_list( standards_vlc, standards_user, NULL )
281 add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
284 add_integer( CFG_PREFIX "input", 0, INPUT_TEXT, INPUT_LONGTEXT,
286 change_integer_range( 0, 0xFFFFFFFE )
288 add_integer( CFG_PREFIX "audio-input", -1, AUDIO_INPUT_TEXT,
289 AUDIO_INPUT_LONGTEXT, true )
290 change_integer_range( -1, 0xFFFFFFFE )
292 add_obsolete_integer( CFG_PREFIX "io" ) /* since 2.0.0 */
293 add_integer( CFG_PREFIX "width", 0, WIDTH_TEXT, SIZE_LONGTEXT, false )
294 change_integer_range( 0, VOUT_MAX_WIDTH )
296 add_integer( CFG_PREFIX "height", 0, HEIGHT_TEXT, SIZE_LONGTEXT, false )
297 change_integer_range( 0, VOUT_MAX_WIDTH )
299 add_string( CFG_PREFIX "aspect-ratio", "4:3", ASPECT_TEXT,
300 ASPECT_LONGTEXT, true )
302 /*add_float( CFG_PREFIX "fps", 0, FPS_TEXT, FPS_LONGTEXT, true )*/
303 add_obsolete_float( CFG_PREFIX "fps" )
304 change_safe() /* since 2.1.0 */
305 add_obsolete_bool( CFG_PREFIX "use-libv4l2" ) /* since 2.1.0 */
307 set_section( N_( "Tuner" ), NULL )
308 add_obsolete_integer( CFG_PREFIX "tuner" ) /* since 2.1.0 */
309 add_integer( CFG_PREFIX "tuner-frequency", -1, FREQUENCY_TEXT,
310 FREQUENCY_LONGTEXT, true )
311 change_integer_range( -1, 0xFFFFFFFE )
313 add_integer( CFG_PREFIX "tuner-audio-mode", V4L2_TUNER_MODE_LANG1,
314 TUNER_AUDIO_MODE_TEXT, TUNER_AUDIO_MODE_LONGTEXT, true )
315 change_integer_list( i_tuner_audio_modes_list,
316 psz_tuner_audio_modes_list_text )
319 set_section( N_( "Controls" ),
320 N_( "Video capture controls (if supported by the device)" ) )
321 add_bool( CFG_PREFIX "controls-reset", false, CTRL_RESET_TEXT,
322 CTRL_RESET_LONGTEXT, true )
324 add_integer( CFG_PREFIX "brightness", -1, BRIGHTNESS_TEXT,
325 BRIGHTNESS_LONGTEXT, true )
326 add_integer( CFG_PREFIX "brightness-auto", -1,
327 BRIGHTNESS_AUTO_TEXT, BRIGHTNESS_AUTO_LONGTEXT, true )
328 change_integer_list( tristate_vlc, tristate_user )
329 add_integer( CFG_PREFIX "contrast", -1, CONTRAST_TEXT,
330 CONTRAST_LONGTEXT, true )
331 add_integer( CFG_PREFIX "saturation", -1, SATURATION_TEXT,
332 SATURATION_LONGTEXT, true )
333 add_integer( CFG_PREFIX "hue", -1, HUE_TEXT,
335 add_integer( CFG_PREFIX "hue-auto", -1,
336 HUE_AUTO_TEXT, HUE_AUTO_LONGTEXT, true )
337 change_integer_list( tristate_vlc, tristate_user )
338 add_obsolete_integer( CFG_PREFIX "black-level" ) /* since Linux 2.6.26 */
339 add_integer( CFG_PREFIX "white-balance-temperature", -1,
340 WHITE_BALANCE_TEMP_TEXT, WHITE_BALANCE_TEMP_LONGTEXT, true )
341 /* Ideally, the range should be 2800-6500 */
342 change_integer_range( -1, 6500 )
343 add_integer( CFG_PREFIX "auto-white-balance", -1,
344 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
345 change_integer_list( tristate_vlc, tristate_user )
346 add_obsolete_integer( CFG_PREFIX"do-white-balance" ) /* since 2.0.0 */
347 add_integer( CFG_PREFIX "red-balance", -1, REDBALANCE_TEXT,
348 REDBALANCE_LONGTEXT, true )
349 add_integer( CFG_PREFIX "blue-balance", -1, BLUEBALANCE_TEXT,
350 BLUEBALANCE_LONGTEXT, true )
351 add_integer( CFG_PREFIX "gamma", -1, GAMMA_TEXT,
352 GAMMA_LONGTEXT, true )
353 add_integer( CFG_PREFIX "autogain", -1, AUTOGAIN_TEXT,
354 AUTOGAIN_LONGTEXT, true )
355 change_integer_list( tristate_vlc, tristate_user )
356 add_integer( CFG_PREFIX "gain", -1, GAIN_TEXT,
357 GAIN_LONGTEXT, true )
358 add_integer( CFG_PREFIX "sharpness", -1,
359 SHARPNESS_TEXT, SHARPNESS_LONGTEXT, true )
360 add_integer( CFG_PREFIX "chroma-gain", -1,
361 CHROMA_GAIN_TEXT, CHROMA_GAIN_LONGTEXT, true )
362 add_integer( CFG_PREFIX "chroma-gain-auto", -1,
363 CHROMA_GAIN_AUTO_TEXT, CHROMA_GAIN_AUTO_LONGTEXT, true )
364 add_integer( CFG_PREFIX"power-line-frequency", -1,
365 POWER_FREQ_TEXT, POWER_FREQ_LONGTEXT, true )
366 change_integer_list( power_freq_vlc, power_freq_user )
367 add_integer( CFG_PREFIX"backlight-compensation", -1,
368 BKLT_COMPENSATE_TEXT, BKLT_COMPENSATE_LONGTEXT, true )
369 add_integer( CFG_PREFIX "band-stop-filter", -1,
370 BAND_STOP_FILTER_TEXT, BAND_STOP_FILTER_LONGTEXT, true )
371 add_bool( CFG_PREFIX "hflip", false, HFLIP_TEXT, HFLIP_LONGTEXT, true )
372 add_bool( CFG_PREFIX "vflip", false, VFLIP_TEXT, VFLIP_LONGTEXT, true )
373 add_integer( CFG_PREFIX "rotate", -1, ROTATE_TEXT, ROTATE_LONGTEXT, true )
374 change_integer_range( -1, 359 )
375 add_obsolete_integer( CFG_PREFIX "hcenter" ) /* since Linux 2.6.26 */
376 add_obsolete_integer( CFG_PREFIX "vcenter" ) /* since Linux 2.6.26 */
377 add_integer( CFG_PREFIX"color-killer", -1,
378 COLOR_KILLER_TEXT, COLOR_KILLER_LONGTEXT, true )
379 change_integer_list( tristate_vlc, tristate_user )
380 add_integer( CFG_PREFIX"color-effect", -1,
381 COLOR_EFFECT_TEXT, COLOR_EFFECT_LONGTEXT, true )
382 change_integer_list( colorfx_vlc, colorfx_user )
384 add_integer( CFG_PREFIX "audio-volume", -1, AUDIO_VOLUME_TEXT,
385 AUDIO_VOLUME_LONGTEXT, true )
386 add_integer( CFG_PREFIX "audio-balance", -1, AUDIO_BALANCE_TEXT,
387 AUDIO_BALANCE_LONGTEXT, true )
388 add_bool( CFG_PREFIX "audio-mute", false, AUDIO_MUTE_TEXT,
389 AUDIO_MUTE_LONGTEXT, true )
390 add_integer( CFG_PREFIX "audio-bass", -1, AUDIO_BASS_TEXT,
391 AUDIO_BASS_LONGTEXT, true )
392 add_integer( CFG_PREFIX "audio-treble", -1, AUDIO_TREBLE_TEXT,
393 AUDIO_TREBLE_LONGTEXT, true )
394 add_bool( CFG_PREFIX "audio-loudness", false, AUDIO_LOUDNESS_TEXT,
395 AUDIO_LOUDNESS_LONGTEXT, true )
396 add_string( CFG_PREFIX "set-ctrls", NULL, S_CTRLS_TEXT,
397 S_CTRLS_LONGTEXT, true )
400 add_obsolete_string( CFG_PREFIX "adev" )
401 add_obsolete_integer( CFG_PREFIX "audio-method" )
402 add_obsolete_bool( CFG_PREFIX "stereo" )
403 add_obsolete_integer( CFG_PREFIX "samplerate" )
405 add_shortcut( "v4l", "v4l2" )
406 set_capability( "access_demux", 0 )
407 set_callbacks( DemuxOpen, DemuxClose )
410 add_shortcut( "v4l", "v4l2", "v4l2c" )
411 set_description( N_("Video4Linux2 Compressed A/V") )
412 set_capability( "access", 0 )
413 /* use these when open as access_demux fails; VLC will use another demux */
414 set_callbacks( AccessOpen, AccessClose )
419 * Parses a V4L2 MRL into VLC object variables.
421 void ParseMRL( vlc_object_t *obj, const char *mrl )
423 const char *p = strchr( mrl, ':' );
428 var_LocationParse( obj, p + 1, CFG_PREFIX );
430 dev = strndup( mrl, p - mrl );
440 var_Create( obj, CFG_PREFIX"dev", VLC_VAR_STRING );
441 var_SetString( obj, CFG_PREFIX"dev", dev );
446 v4l2_std_id var_InheritStandard (vlc_object_t *obj, const char *varname)
448 char *name = var_InheritString (obj, varname);
450 return V4L2_STD_UNKNOWN;
452 const size_t n = sizeof (standards_vlc) / sizeof (*standards_vlc);
454 static_assert (sizeof (standards_vlc) / sizeof (*standards_vlc)
455 == sizeof (standards_v4l2) / sizeof (*standards_v4l2),
456 "Inconsistent standards tables");
457 static_assert (sizeof (standards_vlc) / sizeof (*standards_vlc)
458 == sizeof (standards_user) / sizeof (*standards_user),
459 "Inconsistent standards tables");
461 for (size_t i = 0; i < n; i++)
462 if (strcasecmp (name, standards_vlc[i]) == 0)
465 return standards_v4l2[i];
468 /* Backward compatibility with old versions using V4L2 magic numbers */
470 v4l2_std_id std = strtoull (name, &end, 0);
473 msg_Err (obj, "unknown video standard \"%s\"", name);
474 std = V4L2_STD_UNKNOWN;