1 /*****************************************************************************
2 * video.c : Video4Linux2 input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2002-2009 the VideoLAN team
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 General Public License as published by
14 * the Free Software Foundation; either version 2 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 General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
28 * Sections based on the reference V4L2 capture example at
29 * http://v4l2spec.bytesex.org/spec/capture-example.html
32 /*****************************************************************************
34 *****************************************************************************/
41 #include <vlc_plugin.h>
43 #include <vlc_demux.h>
49 #include <sys/ioctl.h>
53 /*****************************************************************************
55 *****************************************************************************/
57 #define DEVICE_TEXT N_( "Device" )
58 #define DEVICE_LONGTEXT N_( \
59 "Video device (Default: /dev/video0)." )
60 #define STANDARD_TEXT N_( "Standard" )
61 #define STANDARD_LONGTEXT N_( \
62 "Video standard (Default, SECAM, PAL, or NTSC)." )
63 #define CHROMA_TEXT N_("Video input chroma format")
64 #define CHROMA_LONGTEXT N_( \
65 "Force the Video4Linux2 video device to use a specific chroma format " \
66 "(eg. I420 or I422 for raw images, MJPG for M-JPEG compressed input) " \
67 "(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
68 "I41N, I422, I420, I411, I410, MJPG)")
69 #define INPUT_TEXT N_( "Input" )
70 #define INPUT_LONGTEXT N_( \
71 "Input of the card to use (see debug)." )
72 #define AUDIO_INPUT_TEXT N_( "Audio input" )
73 #define AUDIO_INPUT_LONGTEXT N_( \
74 "Audio input of the card to use (see debug)." )
75 #define WIDTH_TEXT N_( "Width" )
76 #define WIDTH_LONGTEXT N_( \
77 "Force width (-1 for autodetect, 0 for driver default)." )
78 #define HEIGHT_TEXT N_( "Height" )
79 #define HEIGHT_LONGTEXT N_( \
80 "Force height (-1 for autodetect, 0 for driver default)." )
81 #define FPS_TEXT N_( "Framerate" )
82 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
83 "(0 for autodetect)." )
86 #define LIBV4L2_TEXT N_( "Use libv4l2" )
87 #define LIBV4L2_LONGTEXT N_( \
88 "Force usage of the libv4l2 wrapper." )
91 #define CTRL_RESET_TEXT N_( "Reset controls" )
92 #define CTRL_RESET_LONGTEXT N_( "Reset controls to defaults." )
93 #define BRIGHTNESS_TEXT N_( "Brightness" )
94 #define BRIGHTNESS_LONGTEXT N_( "Picture brightness or black level." )
95 #define BRIGHTNESS_AUTO_TEXT N_( "Automatic brightness" )
96 #define BRIGHTNESS_AUTO_LONGTEXT N_( \
97 "Automatically adjust the picture brightness." )
98 #define CONTRAST_TEXT N_( "Contrast" )
99 #define CONTRAST_LONGTEXT N_( "Picture contrast or luma gain." )
100 #define SATURATION_TEXT N_( "Saturation" )
101 #define SATURATION_LONGTEXT N_( "Picture saturation or chroma gain." )
102 #define HUE_TEXT N_( "Hue" )
103 #define HUE_LONGTEXT N_( "Hue or color balance." )
104 #define HUE_AUTO_TEXT N_( "Automatic hue" )
105 #define HUE_AUTO_LONGTEXT N_( \
106 "Automatically adjust the picture hue." )
107 #define WHITE_BALANCE_TEMP_TEXT N_( "White balance temperature (K)" )
108 #define WHITE_BALANCE_TEMP_LONGTEXT N_( \
109 "White balance temperature as a color temperation in Kelvin " \
110 "(2800 is minimum incandescence, 6500 is maximum daylight)." )
111 #define AUTOWHITEBALANCE_TEXT N_( "Automatic white balance" )
112 #define AUTOWHITEBALANCE_LONGTEXT N_( \
113 "Automatically adjust the picture white balance." )
114 #define REDBALANCE_TEXT N_( "Red balance" )
115 #define REDBALANCE_LONGTEXT N_( \
116 "Red chroma balance." )
117 #define BLUEBALANCE_TEXT N_( "Blue balance" )
118 #define BLUEBALANCE_LONGTEXT N_( \
119 "Blue chroma balance." )
120 #define GAMMA_TEXT N_( "Gamma" )
121 #define GAMMA_LONGTEXT N_( \
123 #define AUTOGAIN_TEXT N_( "Automatic gain" )
124 #define AUTOGAIN_LONGTEXT N_( \
125 "Automatically set the video gain." )
126 #define GAIN_TEXT N_( "Gain" )
127 #define GAIN_LONGTEXT N_( \
129 #define SHARPNESS_TEXT N_( "Sharpness" )
130 #define SHARPNESS_LONGTEXT N_( "Sharpness filter adjust." )
131 #define CHROMA_GAIN_TEXT N_( "Chroma gain" )
132 #define CHROMA_GAIN_LONGTEXT N_( "Chroma gain control." )
133 #define CHROMA_GAIN_AUTO_TEXT N_( "Automatic chroma gain" )
134 #define CHROMA_GAIN_AUTO_LONGTEXT N_( \
135 "Automatically control the chroma gain." )
136 #define POWER_FREQ_TEXT N_( "Power line frequency" )
137 #define POWER_FREQ_LONGTEXT N_( \
138 "Power line frequency anti-flicker filter." )
139 static const int power_freq_vlc[] = { -1,
140 V4L2_CID_POWER_LINE_FREQUENCY_DISABLED,
141 V4L2_CID_POWER_LINE_FREQUENCY_50HZ,
142 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
143 V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
145 static const char *const power_freq_user[] = { N_("Unspecified"),
146 N_("Off"), N_("50 Hz"), N_("60 Hz"), N_("Automatic"),
148 #define BKLT_COMPENSATE_TEXT N_( "Backlight compensation" )
149 #define BKLT_COMPENSATE_LONGTEXT N_( "Backlight compensation." )
150 #define BAND_STOP_FILTER_TEXT N_( "Band-stop filter" )
151 #define BAND_STOP_FILTER_LONGTEXT N_( \
152 "Cut a light band induced by fluorescent lighting (unit undocumented)." )
153 #define HFLIP_TEXT N_( "Horizontal flip" )
154 #define HFLIP_LONGTEXT N_( \
155 "Flip the picture horizontally." )
156 #define VFLIP_TEXT N_( "Vertical flip" )
157 #define VFLIP_LONGTEXT N_( \
158 "Flip the picture vertically." )
159 #define ROTATE_TEXT N_( "Rotate (degrees)" )
160 #define ROTATE_LONGTEXT N_( "Picture rotation angle (in degrees)." )
161 #define COLOR_KILLER_TEXT N_( "Color killer" )
162 #define COLOR_KILLER_LONGTEXT N_( \
163 "Enable the color killer, i.e. switch to black & white picture " \
164 "whenever the signal is weak." )
165 #define COLOR_EFFECT_TEXT N_( "Color effect" )
166 #define COLOR_EFFECT_LONGTEXT N_( "Select a color effect." )
167 static const int colorfx_vlc[] = { -1, V4L2_COLORFX_NONE,
168 V4L2_COLORFX_BW, V4L2_COLORFX_SEPIA, V4L2_COLORFX_NEGATIVE,
169 V4L2_COLORFX_EMBOSS, V4L2_COLORFX_SKETCH, V4L2_COLORFX_SKY_BLUE,
170 V4L2_COLORFX_GRASS_GREEN, V4L2_COLORFX_SKIN_WHITEN, V4L2_COLORFX_VIVID,
172 static const char *const colorfx_user[] = { N_("Unspecified"), N_("None"),
173 N_("Black & white"), N_("Sepia"), N_("Negative"),
174 N_("Emboss"), N_("Sketch"), N_("Sky blue"),
175 N_("Grass green"), N_("Skin whiten"), N_("Vivid"),
178 #define AUDIO_VOLUME_TEXT N_( "Audio volume" )
179 #define AUDIO_VOLUME_LONGTEXT N_( \
180 "Volume of the audio input." )
181 #define AUDIO_BALANCE_TEXT N_( "Audio balance" )
182 #define AUDIO_BALANCE_LONGTEXT N_( \
183 "Balance of the audio input." )
184 #define AUDIO_BASS_TEXT N_( "Bass level" )
185 #define AUDIO_BASS_LONGTEXT N_( \
186 "Bass adjustment of the audio input." )
187 #define AUDIO_TREBLE_TEXT N_( "Treble level" )
188 #define AUDIO_TREBLE_LONGTEXT N_( \
189 "Treble adjustment of the audio input." )
190 #define AUDIO_MUTE_TEXT N_( "Mute" )
191 #define AUDIO_MUTE_LONGTEXT N_( \
193 #define AUDIO_LOUDNESS_TEXT N_( "Loudness mode" )
194 #define AUDIO_LOUDNESS_LONGTEXT N_( \
195 "Loudness mode a.k.a. bass boost." )
197 #define S_CTRLS_TEXT N_("v4l2 driver controls")
198 #define S_CTRLS_LONGTEXT N_( \
199 "Set the v4l2 driver controls to the values specified using a comma " \
200 "separated list optionally encapsulated by curly braces " \
201 "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
202 "To list available controls, increase verbosity (-vvv) " \
203 "or use the v4l2-ctl application." )
205 #define TUNER_TEXT N_("Tuner id")
206 #define TUNER_LONGTEXT N_( \
207 "Tuner id (see debug output)." )
208 #define FREQUENCY_TEXT N_("Frequency")
209 #define FREQUENCY_LONGTEXT N_( \
210 "Tuner frequency in Hz or kHz (see debug output)" )
211 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
212 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
213 "Tuner audio mono/stereo and track selection." )
215 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
216 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
218 static const int tristate_vlc[] = { -1, 0, 1 };
219 static const char *const tristate_user[] = {
220 N_("Unspecified"), N_("Off"), N_("On") };
222 static const v4l2_std_id standards_v4l2[] = { V4L2_STD_UNKNOWN, V4L2_STD_ALL,
223 V4L2_STD_PAL, V4L2_STD_PAL_BG, V4L2_STD_PAL_DK,
225 V4L2_STD_SECAM, V4L2_STD_SECAM_DK,
226 V4L2_STD_MTS, V4L2_STD_525_60, V4L2_STD_625_50,
229 V4L2_STD_B, V4L2_STD_G, V4L2_STD_H, V4L2_STD_L,
230 V4L2_STD_GH, V4L2_STD_DK, V4L2_STD_BG, V4L2_STD_MN,
232 V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
233 V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
234 V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
235 V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP,V4L2_STD_NTSC_443, V4L2_STD_NTSC_M_KR,
236 V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G, V4L2_STD_SECAM_H,
237 V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1, V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
238 V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
240 static const char *const standards_vlc[] = { "", "ALL",
241 /* Pseudo standards */
242 "PAL", "PAL_BG", "PAL_DK",
245 "MTS", "525_60", "625_50",
248 /* Chroma-agnostic ITU standards (PAL/NTSC or PAL/SECAM) */
250 "GH", "DK", "BG", "MN",
252 /* Individual standards */
253 "PAL_B", "PAL_B1", "PAL_G", "PAL_H",
254 "PAL_I", "PAL_D", "PAL_D1", "PAL_K",
255 "PAL_M", "PAL_N", "PAL_Nc", "PAL_60",
256 "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR",
257 "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H",
258 "SECAM_K", "SECAM_K1", "SECAM_L", "SECAM_LC",
259 "ATSC_8_VSB", "ATSC_16_VSB",
261 static const char *const standards_user[] = { N_("Undefined"), N_("All"),
262 "PAL", "PAL B/G", "PAL D/K",
264 "SECAM", "SECAM D/K",
265 N_("Multichannel television sound (MTS)"),
266 N_("525 lines / 60 Hz"), N_("625 lines / 50 Hz"),
269 "PAL/SECAM B", "PAL/SECAM G", "PAL/SECAM H", "PAL/SECAM L",
270 "PAL/SECAM G/H", "PAL/SECAM D/K", "PAL/SECAM B/G", "PAL/NTSC M/N",
272 "PAL B", "PAL B1", "PAL G", "PAL H",
273 "PAL I", "PAL D", "PAL D1", "PAL K",
274 "PAL M", "PAL N", N_("PAL N Argentina"), "PAL 60",
275 "NTSC M", N_("NTSC M Japan"), "NTSC 443", N_("NTSC M South Korea"),
276 "SECAM B", "SECAM D", "SECAM G", "SECAM H",
277 "SECAM K", "SECAM K1", "SECAM L", "SECAM L/C",
278 "ATSC 8-VSB", "ATSC 16-VSB",
281 static const int i_tuner_audio_modes_list[] = {
282 -1, V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
283 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
284 V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
285 static const char *const psz_tuner_audio_modes_list_text[] = {
289 N_( "Primary language (Analog TV tuners only)" ),
290 N_( "Secondary language (Analog TV tuners only)" ),
291 N_( "Second audio program (Analog TV tuners only)" ),
292 N_( "Primary language left, Secondary language right" ) };
294 #define V4L2_DEFAULT "/dev/video0"
297 # define DEFAULT_WIDTH 640
298 # define DEFAULT_HEIGHT 492
301 #ifndef DEFAULT_WIDTH
302 # define DEFAULT_WIDTH (-1)
303 # define DEFAULT_HEIGHT (-1)
307 set_shortname( N_("Video4Linux2") )
308 set_description( N_("Video4Linux2 input") )
309 set_category( CAT_INPUT )
310 set_subcategory( SUBCAT_INPUT_ACCESS )
312 set_section( N_( "Video input" ), NULL )
313 add_string( CFG_PREFIX "dev", "/dev/video0", DEVICE_TEXT, DEVICE_LONGTEXT,
316 add_string( CFG_PREFIX "standard", "",
317 STANDARD_TEXT, STANDARD_LONGTEXT, false )
318 change_string_list( standards_vlc, standards_user, NULL )
320 add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
323 add_integer( CFG_PREFIX "input", 0, INPUT_TEXT, INPUT_LONGTEXT,
325 change_integer_range( 0, 0xFFFFFFFE )
327 add_integer( CFG_PREFIX "audio-input", -1, AUDIO_INPUT_TEXT,
328 AUDIO_INPUT_LONGTEXT, true )
329 change_integer_range( -1, 0xFFFFFFFE )
331 add_obsolete_integer( CFG_PREFIX "io" ) /* since 1.2.0 */
332 add_integer( CFG_PREFIX "width", DEFAULT_WIDTH, WIDTH_TEXT,
333 WIDTH_LONGTEXT, true )
335 add_integer( CFG_PREFIX "height", DEFAULT_HEIGHT, HEIGHT_TEXT,
336 HEIGHT_LONGTEXT, true )
338 add_string( CFG_PREFIX "aspect-ratio", "4:3", ASPECT_TEXT,
339 ASPECT_LONGTEXT, true )
341 add_float( CFG_PREFIX "fps", 0, FPS_TEXT, FPS_LONGTEXT, true )
344 add_bool( CFG_PREFIX "use-libv4l2", false, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
347 set_section( N_( "Tuner" ), NULL )
348 add_integer( CFG_PREFIX "tuner", 0, TUNER_TEXT, TUNER_LONGTEXT,
350 change_integer_range( 0, 0xFFFFFFFE )
352 add_integer( CFG_PREFIX "tuner-frequency", -1, FREQUENCY_TEXT,
353 FREQUENCY_LONGTEXT, true )
354 change_integer_range( -1, 0xFFFFFFFE )
356 add_integer( CFG_PREFIX "tuner-audio-mode", -1, TUNER_AUDIO_MODE_TEXT,
357 TUNER_AUDIO_MODE_LONGTEXT, true )
358 change_integer_list( i_tuner_audio_modes_list,
359 psz_tuner_audio_modes_list_text )
362 set_section( N_( "Controls" ),
363 N_( "Video capture controls (if supported by the device)" ) )
364 add_bool( CFG_PREFIX "controls-reset", false, CTRL_RESET_TEXT,
365 CTRL_RESET_LONGTEXT, true )
367 add_integer( CFG_PREFIX "brightness", -1, BRIGHTNESS_TEXT,
368 BRIGHTNESS_LONGTEXT, true )
369 add_integer( CFG_PREFIX "brightness-auto", -1,
370 BRIGHTNESS_AUTO_TEXT, BRIGHTNESS_AUTO_LONGTEXT, true )
371 change_integer_list( tristate_vlc, tristate_user )
372 add_integer( CFG_PREFIX "contrast", -1, CONTRAST_TEXT,
373 CONTRAST_LONGTEXT, true )
374 add_integer( CFG_PREFIX "saturation", -1, SATURATION_TEXT,
375 SATURATION_LONGTEXT, true )
376 add_integer( CFG_PREFIX "hue", -1, HUE_TEXT,
378 add_integer( CFG_PREFIX "hue-auto", -1,
379 HUE_AUTO_TEXT, HUE_AUTO_LONGTEXT, true )
380 change_integer_list( tristate_vlc, tristate_user )
381 add_obsolete_integer( CFG_PREFIX "black-level" ) /* since Linux 2.6.26 */
382 add_integer( CFG_PREFIX "white-balance-temperature", -1,
383 WHITE_BALANCE_TEMP_TEXT, WHITE_BALANCE_TEMP_LONGTEXT, true )
384 /* Ideally, the range should be 2800-6500 */
385 change_integer_range( -1, 6500 )
386 add_integer( CFG_PREFIX "auto-white-balance", -1,
387 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
388 change_integer_list( tristate_vlc, tristate_user )
389 add_obsolete_integer( CFG_PREFIX"do-white-balance" ) /* since 1.2.0 */
390 add_integer( CFG_PREFIX "red-balance", -1, REDBALANCE_TEXT,
391 REDBALANCE_LONGTEXT, true )
392 add_integer( CFG_PREFIX "blue-balance", -1, BLUEBALANCE_TEXT,
393 BLUEBALANCE_LONGTEXT, true )
394 add_integer( CFG_PREFIX "gamma", -1, GAMMA_TEXT,
395 GAMMA_LONGTEXT, true )
396 add_integer( CFG_PREFIX "autogain", -1, AUTOGAIN_TEXT,
397 AUTOGAIN_LONGTEXT, true )
398 change_integer_list( tristate_vlc, tristate_user )
399 add_integer( CFG_PREFIX "gain", -1, GAIN_TEXT,
400 GAIN_LONGTEXT, true )
401 add_integer( CFG_PREFIX "sharpness", -1,
402 SHARPNESS_TEXT, SHARPNESS_LONGTEXT, true )
403 add_integer( CFG_PREFIX "chroma-gain", -1,
404 CHROMA_GAIN_TEXT, CHROMA_GAIN_LONGTEXT, true )
405 add_integer( CFG_PREFIX "chroma-gain-auto", -1,
406 CHROMA_GAIN_AUTO_TEXT, CHROMA_GAIN_AUTO_LONGTEXT, true )
407 add_integer( CFG_PREFIX"power-line-frequency", -1,
408 POWER_FREQ_TEXT, POWER_FREQ_LONGTEXT, true )
409 change_integer_list( power_freq_vlc, power_freq_user )
410 add_integer( CFG_PREFIX"backlight-compensation", -1,
411 BKLT_COMPENSATE_TEXT, BKLT_COMPENSATE_LONGTEXT, true )
412 add_integer( CFG_PREFIX "band-stop-filter", -1,
413 BAND_STOP_FILTER_TEXT, BAND_STOP_FILTER_LONGTEXT, true )
414 add_bool( CFG_PREFIX "hflip", false, HFLIP_TEXT, HFLIP_LONGTEXT, true )
415 add_bool( CFG_PREFIX "vflip", false, VFLIP_TEXT, VFLIP_LONGTEXT, true )
416 add_integer( CFG_PREFIX "rotate", -1, ROTATE_TEXT, ROTATE_LONGTEXT, true )
417 change_integer_range( -1, 359 )
418 add_obsolete_integer( CFG_PREFIX "hcenter" ) /* since Linux 2.6.26 */
419 add_obsolete_integer( CFG_PREFIX "vcenter" ) /* since Linux 2.6.26 */
420 add_integer( CFG_PREFIX"color-killer", -1,
421 COLOR_KILLER_TEXT, COLOR_KILLER_LONGTEXT, true )
422 change_integer_list( tristate_vlc, tristate_user )
423 add_integer( CFG_PREFIX"color-effect", -1,
424 COLOR_EFFECT_TEXT, COLOR_EFFECT_LONGTEXT, true )
425 change_integer_list( colorfx_vlc, colorfx_user )
427 add_integer( CFG_PREFIX "audio-volume", -1, AUDIO_VOLUME_TEXT,
428 AUDIO_VOLUME_LONGTEXT, true )
429 add_integer( CFG_PREFIX "audio-balance", -1, AUDIO_BALANCE_TEXT,
430 AUDIO_BALANCE_LONGTEXT, true )
431 add_bool( CFG_PREFIX "audio-mute", false, AUDIO_MUTE_TEXT,
432 AUDIO_MUTE_LONGTEXT, true )
433 add_integer( CFG_PREFIX "audio-bass", -1, AUDIO_BASS_TEXT,
434 AUDIO_BASS_LONGTEXT, true )
435 add_integer( CFG_PREFIX "audio-treble", -1, AUDIO_TREBLE_TEXT,
436 AUDIO_TREBLE_LONGTEXT, true )
437 add_bool( CFG_PREFIX "audio-loudness", false, AUDIO_LOUDNESS_TEXT,
438 AUDIO_LOUDNESS_LONGTEXT, true )
439 add_string( CFG_PREFIX "set-ctrls", NULL, S_CTRLS_TEXT,
440 S_CTRLS_LONGTEXT, true )
443 add_obsolete_string( CFG_PREFIX "adev" )
444 add_obsolete_integer( CFG_PREFIX "audio-method" )
445 add_obsolete_bool( CFG_PREFIX "stereo" )
446 add_obsolete_integer( CFG_PREFIX "samplerate" )
448 add_shortcut( "v4l2" )
449 set_capability( "access_demux", 0 )
450 set_callbacks( DemuxOpen, DemuxClose )
453 add_shortcut( "v4l2", "v4l2c" )
454 set_description( N_("Video4Linux2 Compressed A/V") )
455 set_capability( "access", 0 )
456 /* use these when open as access_demux fails; VLC will use another demux */
457 set_callbacks( AccessOpen, AccessClose )
461 /*****************************************************************************
462 * Access: local prototypes
463 *****************************************************************************/
465 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
470 vlc_fourcc_t i_fourcc;
474 } v4l2chroma_to_fourcc[] =
477 { V4L2_PIX_FMT_GREY, VLC_CODEC_GREY, 0, 0, 0 },
478 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
479 { V4L2_PIX_FMT_RGB555, VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
480 { V4L2_PIX_FMT_RGB565, VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
481 /* Won't work since we don't know how to handle such gmask values
483 { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
484 { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
486 { V4L2_PIX_FMT_BGR24, VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
487 { V4L2_PIX_FMT_RGB24, VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
488 { V4L2_PIX_FMT_BGR32, VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
489 { V4L2_PIX_FMT_RGB32, VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
490 { V4L2_PIX_FMT_YUYV, VLC_CODEC_YUYV, 0, 0, 0 },
491 { V4L2_PIX_FMT_UYVY, VLC_CODEC_UYVY, 0, 0, 0 },
492 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
493 { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
494 { V4L2_PIX_FMT_YVU420, VLC_CODEC_YV12, 0, 0, 0 },
495 { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
496 { V4L2_PIX_FMT_YUV410, VLC_CODEC_I410, 0, 0, 0 },
498 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
500 { V4L2_PIX_FMT_YUV420, VLC_CODEC_I420, 0, 0, 0 },
501 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_CODEC_RGB32 }, */
503 /* Compressed data types */
504 { V4L2_PIX_FMT_MJPEG, VLC_CODEC_MJPG, 0, 0, 0 },
505 { V4L2_PIX_FMT_JPEG, VLC_CODEC_JPEG, 0, 0, 0 },
507 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
508 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
514 * List of V4L2 chromas were confident enough to use as fallbacks if the
515 * user hasn't provided a --v4l2-chroma value.
517 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
519 static const uint32_t p_chroma_fallbacks[] =
520 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
521 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
522 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
525 * Parses a V4L2 MRL into VLC object variables.
527 void ParseMRL( vlc_object_t *obj, const char *mrl )
529 const char *p = strchr( mrl, ':' );
534 var_LocationParse( obj, p + 1, CFG_PREFIX );
536 dev = strndup( mrl, p - mrl );
546 var_Create( obj, CFG_PREFIX"dev", VLC_VAR_STRING );
547 var_SetString( obj, CFG_PREFIX"dev", dev );
552 /*****************************************************************************
553 * GrabVideo: Grab a video frame
554 *****************************************************************************/
555 block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
558 struct v4l2_buffer buf;
560 /* Grab Video Frame */
564 memset( &buf, 0, sizeof(buf) );
565 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
566 buf.memory = V4L2_MEMORY_MMAP;
568 /* Wait for next frame */
569 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
576 /* Could ignore EIO, see spec. */
579 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
584 if( buf.index >= p_sys->i_nbuffers ) {
585 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
589 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
594 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
596 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
597 block_Release( p_block );
603 case IO_METHOD_USERPTR:
604 memset( &buf, 0, sizeof(buf) );
605 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
606 buf.memory = V4L2_MEMORY_USERPTR;
608 /* Wait for next frame */
609 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
616 /* Could ignore EIO, see spec. */
619 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
626 for( i = 0; i < p_sys->i_nbuffers; i++ )
628 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
629 buf.length == p_sys->p_buffers[i].length ) break;
632 if( i >= p_sys->i_nbuffers )
634 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
638 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
643 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
645 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
646 block_Release( p_block );
656 /*****************************************************************************
657 * ProcessVideoFrame: Helper function to take a buffer and copy it into
659 *****************************************************************************/
660 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
664 if( !p_frame ) return NULL;
667 if( !( p_block = block_New( p_demux, i_size ) ) )
669 msg_Warn( p_demux, "Cannot get new block" );
674 memcpy( p_block->p_buffer, p_frame, i_size );
679 /*****************************************************************************
680 * Helper function to initalise video IO using the mmap method
681 *****************************************************************************/
682 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
684 struct v4l2_requestbuffers req;
686 memset( &req, 0, sizeof(req) );
688 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
689 req.memory = V4L2_MEMORY_MMAP;
691 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
693 msg_Err( p_demux, "device does not support mmap I/O" );
699 msg_Err( p_demux, "insufficient buffers" );
703 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
704 if( unlikely(!p_sys->p_buffers) )
707 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
709 struct v4l2_buffer buf;
711 memset( &buf, 0, sizeof(buf) );
712 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
713 buf.memory = V4L2_MEMORY_MMAP;
714 buf.index = p_sys->i_nbuffers;
716 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
718 msg_Err( p_demux, "VIDIOC_QUERYBUF: %m" );
722 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
723 p_sys->p_buffers[p_sys->i_nbuffers].start =
724 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
726 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
728 msg_Err( p_demux, "mmap failed: %m" );
736 /*****************************************************************************
737 * Helper function to initalise video IO using the userbuf method
738 *****************************************************************************/
739 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
741 struct v4l2_requestbuffers req;
742 unsigned int i_page_size;
744 i_page_size = sysconf(_SC_PAGESIZE);
745 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
747 memset( &req, 0, sizeof(req) );
749 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
750 req.memory = V4L2_MEMORY_USERPTR;
752 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
754 msg_Err( p_demux, "device does not support user pointer i/o" );
758 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
759 if( !p_sys->p_buffers )
762 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
764 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
765 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
766 /* boundary */ i_page_size, i_buffer_size ) )
774 * \return true if the specified V4L2 pixel format is
775 * in the array of supported formats returned by the driver
777 static bool IsPixelFormatSupported( struct v4l2_fmtdesc *codecs, size_t n,
778 unsigned int i_pixelformat )
780 for( size_t i = 0; i < n; i++ )
781 if( codecs[i].pixelformat == i_pixelformat )
787 static int InitVideo( vlc_object_t *p_obj, int i_fd, demux_sys_t *p_sys,
791 * Opens and sets up a video device
792 * \return file descriptor or -1 on error
794 int OpenVideo( vlc_object_t *obj, demux_sys_t *sys, bool b_demux )
796 char *path = var_InheritString( obj, CFG_PREFIX"dev" );
797 if( unlikely(path == NULL) )
798 return -1; /* probably OOM */
800 msg_Dbg( obj, "opening device '%s'", path );
802 int fd = vlc_open( path, O_RDWR );
805 msg_Err( obj, "cannot open device '%s': %m", path );
811 if( !var_InheritBool( obj, CFG_PREFIX "use-libv4l2" ) )
813 msg_Dbg( obj, "trying kernel V4L2" );
814 if( InitVideo( obj, fd, sys, b_demux ) == 0 )
817 msg_Dbg( obj, "trying library V4L2" );
818 /* Note the v4l2_xxx functions are designed so that if they get passed an
819 unknown fd, the will behave exactly as their regular xxx counterparts,
820 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
821 custom cam format to normal formats conversion). Chances are big we will
822 still fail then though, as normally v4l2_fd_open only fails if the
823 device is not a v4l2 device. */
824 int libfd = v4l2_fd_open( fd, 0 );
829 if( InitVideo( obj, fd, sys, b_demux ) )
838 static int InitVideo( vlc_object_t *p_obj, int i_fd, demux_sys_t *p_sys,
841 struct v4l2_cropcap cropcap;
842 struct v4l2_crop crop;
843 struct v4l2_format fmt;
845 enum v4l2_buf_type buf_type;
848 /* Get device capabilites */
849 struct v4l2_capability cap;
850 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &cap ) < 0 )
852 msg_Err( p_obj, "cannot get video capabilities: %m" );
856 msg_Dbg( p_obj, "device %s using driver %s (version %u.%u.%u) on %s",
857 cap.card, cap.driver, (cap.version >> 16) & 0xFF,
858 (cap.version >> 8) & 0xFF, cap.version & 0xFF, cap.bus_info );
859 msg_Dbg( p_obj, "the device has the capabilities: 0x%08X",
861 msg_Dbg( p_obj, " (%c) Video Capture, (%c) Audio, (%c) Tuner, (%c) Radio",
862 ( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
863 ( cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
864 ( cap.capabilities & V4L2_CAP_TUNER ? 'X':' '),
865 ( cap.capabilities & V4L2_CAP_RADIO ? 'X':' ') );
866 msg_Dbg( p_obj, " (%c) Read/Write, (%c) Streaming, (%c) Asynchronous",
867 ( cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
868 ( cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
869 ( cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
871 if( cap.capabilities & V4L2_CAP_STREAMING )
872 p_sys->io = IO_METHOD_MMAP;
873 else if( cap.capabilities & V4L2_CAP_READWRITE )
874 p_sys->io = IO_METHOD_READ;
877 msg_Err( p_obj, "no supported I/O method" );
881 /* Now, enumerate all the video inputs. This is useless at the moment
882 since we have no way to present that info to the user except with
884 if( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
886 struct v4l2_input input;
887 unsigned index = var_InheritInteger( p_obj, CFG_PREFIX"input" );
890 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &input ) >= 0 )
892 msg_Dbg( p_obj, "video input %u (%s) has type: %s %c",
893 input.index, input.name,
894 input.type == V4L2_INPUT_TYPE_TUNER
895 ? "Tuner adapter" : "External analog input",
896 input.index == index ? '*' : ' ' );
901 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &index ) < 0 )
903 msg_Err( p_obj, "cannot set input %u: %m", index );
906 msg_Dbg( p_obj, "input set to %u", index );
909 /* Select standard */
911 const char *stdname = var_InheritString( p_obj, CFG_PREFIX"standard" );
912 if( stdname != NULL )
914 v4l2_std_id std = strtoull( stdname, NULL, 0 );
917 const size_t n = sizeof(standards_vlc) / sizeof(*standards_vlc);
919 static_assert(sizeof(standards_vlc) / sizeof(*standards_vlc)
920 == sizeof (standards_v4l2) / sizeof (*standards_v4l2),
921 "Inconsistent standards tables");
922 static_assert(sizeof(standards_vlc) / sizeof(*standards_vlc)
923 == sizeof (standards_user) / sizeof (*standards_user),
924 "Inconsistent standards tables");
926 for( size_t i = 0; i < n; i++ )
927 if( strcasecmp( stdname, standards_vlc[i] ) == 0 )
929 std = standards_v4l2[i];
934 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &std ) < 0
935 || v4l2_ioctl( i_fd, VIDIOC_G_STD, &std ) < 0 )
937 msg_Err( p_obj, "cannot set standard 0x%"PRIx64": %m", std );
940 msg_Dbg( p_obj, "standard set to 0x%"PRIx64":", std );
941 bottom_first = std == V4L2_STD_NTSC;
944 bottom_first = false;
946 /* Set audio input */
947 if( cap.capabilities & V4L2_CAP_AUDIO )
949 struct v4l2_audio audio = { .index = 0 };
950 uint32_t idx = var_InheritInteger( p_obj, CFG_PREFIX"audio-input" );
952 /* Probe audio inputs */
953 while( v4l2_ioctl( i_fd, VIDIOC_ENUMAUDIO, &audio ) >= 0 )
955 msg_Dbg( p_obj, "audio input %u (%s) is %s%s %c", audio.index,
957 audio.capability & V4L2_AUDCAP_STEREO ? "Stereo" : "Mono",
958 audio.capability & V4L2_AUDCAP_AVL
959 ? " (Automatic Volume Level supported)" : "",
960 audio.index == idx );
964 if( idx != (uint32_t)-1 )
966 memset( &audio, 0, sizeof(audio) );
968 /* TODO: AVL support (audio.mode) */
970 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &audio ) < 0 )
972 msg_Err( p_obj, "cannot set audio input %"PRIu32": %m", idx );
975 msg_Dbg( p_obj, "audio input set to %"PRIu32, idx );
979 /* List tuner caps */
980 if( cap.capabilities & V4L2_CAP_TUNER )
982 struct v4l2_tuner tuner;
983 uint32_t idx = var_CreateGetInteger( p_obj, CFG_PREFIX"tuner" );
984 enum v4l2_tuner_type type = V4L2_TUNER_RADIO;
987 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
989 if( tuner.index == idx )
993 (tuner.capability & V4L2_TUNER_CAP_LOW) ? "Hz" : "kHz";
994 msg_Dbg( p_obj, "tuner %u (%s) has type: %s, "
995 "frequency range: %.1f %s -> %.1f %s", tuner.index,
997 tuner.type == V4L2_TUNER_RADIO ? "Radio" : "Analog TV",
998 tuner.rangelow * 62.5, unit,
999 tuner.rangehigh * 62.5, unit );
1001 struct v4l2_frequency frequency = { .tuner = tuner.index };
1002 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
1004 msg_Err( p_obj, "cannot get tuner frequency: %m" );
1007 msg_Dbg( p_obj, "tuner %u (%s) frequency: %.1f %s", tuner.index,
1008 tuner.name, frequency.frequency * 62.5, unit );
1012 /* Tune the tuner */
1013 uint32_t freq = var_InheritInteger( p_obj,
1014 CFG_PREFIX"tuner-frequency" );
1015 if( freq != (uint32_t)-1 )
1017 struct v4l2_frequency frequency = {
1020 .frequency = freq / 62.5,
1023 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1025 msg_Err( p_obj, "cannot set tuner frequency: %m" );
1028 msg_Dbg( p_obj, "tuner frequency set" );
1031 /* Set the tuner audio mode */
1032 int32_t audmode = var_InheritInteger( p_obj,
1033 CFG_PREFIX"tuner-audio-mode" );
1036 struct v4l2_tuner tuner = {
1041 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1043 msg_Err( p_obj, "cannot set tuner audio mode: %m" );
1046 msg_Dbg( p_obj, "tuner audio mode set" );
1050 /* Probe for available chromas */
1051 struct v4l2_fmtdesc *codecs = NULL;
1052 uint_fast32_t ncodec = 0;
1053 if( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
1055 struct v4l2_fmtdesc codec = {
1057 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1060 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
1061 codec.index = ++ncodec;
1063 codecs = malloc( ncodec * sizeof( *codecs ) );
1064 if( unlikely(codecs == NULL) )
1067 for( uint_fast32_t i = 0; i < ncodec; i++ )
1069 codecs[i].index = i;
1070 codecs[i].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1072 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codecs[i] ) < 0 )
1074 msg_Err( p_obj, "cannot get codec description: %m" );
1078 /* only print if vlc supports the format */
1079 char fourcc_v4l2[5];
1080 memset( fourcc_v4l2, 0, sizeof( fourcc_v4l2 ) );
1081 vlc_fourcc_to_char( codecs[i].pixelformat, fourcc_v4l2 );
1083 bool b_codec_supported = false;
1084 for( unsigned j = 0; v4l2chroma_to_fourcc[j].i_v4l2 != 0; j++ )
1086 if( v4l2chroma_to_fourcc[j].i_v4l2 == codecs[i].pixelformat )
1089 memset( fourcc, 0, sizeof( fourcc ) );
1090 vlc_fourcc_to_char( v4l2chroma_to_fourcc[j].i_fourcc,
1092 msg_Dbg( p_obj, "device supports chroma %4.4s [%s, %s]",
1093 fourcc, codecs[i].description, fourcc_v4l2 );
1094 b_codec_supported = true;
1097 if( !b_codec_supported )
1099 msg_Dbg( p_obj, "device codec %4.4s (%s) not supported",
1100 fourcc_v4l2, codecs[i].description );
1105 /* TODO: Move the resolution stuff up here */
1106 /* if MPEG encoder card, no need to do anything else after this */
1107 p_sys->controls = ControlsInit( p_obj, i_fd );
1109 /* Reset Cropping */
1110 memset( &cropcap, 0, sizeof(cropcap) );
1111 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1112 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1114 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1115 crop.c = cropcap.defrect; /* reset to default */
1116 if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
1118 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1123 /* Cropping not supported. */
1126 /* Errors ignored. */
1133 /* Try and find default resolution if not specified */
1134 int width = var_InheritInteger( p_obj, CFG_PREFIX"width" );
1135 int height = var_InheritInteger( p_obj, CFG_PREFIX"height" );
1137 memset( &fmt, 0, sizeof(fmt) );
1138 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1140 if( width <= 0 || height <= 0 )
1142 /* Use current width and height settings */
1143 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
1145 msg_Err( p_obj, "cannot get default width and height: %m" );
1149 msg_Dbg( p_obj, "found default width and height of %ux%u",
1150 fmt.fmt.pix.width, fmt.fmt.pix.height );
1152 if( width < 0 || height < 0 )
1154 msg_Dbg( p_obj, "will try to find optimal width and height" );
1159 /* Use user specified width and height */
1160 msg_Dbg( p_obj, "trying specified size %dx%d", width, height );
1161 fmt.fmt.pix.width = width;
1162 fmt.fmt.pix.height = height;
1165 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1170 char *reqchroma = var_InheritString( p_obj, CFG_PREFIX"chroma" );
1172 /* Test and set Chroma */
1173 fmt.fmt.pix.pixelformat = 0;
1174 if( reqchroma != NULL )
1176 /* User specified chroma */
1177 const vlc_fourcc_t i_requested_fourcc =
1178 vlc_fourcc_GetCodecFromString( VIDEO_ES, reqchroma );
1180 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
1182 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
1184 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
1188 /* Try and set user chroma */
1189 bool b_error = !IsPixelFormatSupported( codecs, ncodec,
1190 fmt.fmt.pix.pixelformat );
1191 if( !b_error && fmt.fmt.pix.pixelformat )
1193 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1195 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1196 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1198 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1205 msg_Warn( p_obj, "requested chroma %s not supported. "
1206 " Trying default.", reqchroma );
1207 fmt.fmt.pix.pixelformat = 0;
1212 /* If no user specified chroma, find best */
1213 /* This also decides if MPEG encoder card or not */
1214 if( !fmt.fmt.pix.pixelformat )
1217 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
1219 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
1220 if( IsPixelFormatSupported( codecs, ncodec,
1221 fmt.fmt.pix.pixelformat ) )
1223 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1225 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1226 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1228 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1231 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
1233 msg_Warn( p_obj, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
1238 if( width < 0 || height < 0 )
1240 f_fps = var_InheritFloat( p_obj, CFG_PREFIX"fps" );
1243 f_fps = GetAbsoluteMaxFrameRate( p_obj, i_fd,
1244 fmt.fmt.pix.pixelformat );
1245 msg_Dbg( p_obj, "Found maximum framerate of %f", f_fps );
1247 uint32_t i_width, i_height;
1248 GetMaxDimensions( p_obj, i_fd,
1249 fmt.fmt.pix.pixelformat, f_fps,
1250 &i_width, &i_height );
1251 if( i_width || i_height )
1253 msg_Dbg( p_obj, "Found optimal dimensions for framerate %f "
1254 "of %ux%u", f_fps, i_width, i_height );
1255 fmt.fmt.pix.width = i_width;
1256 fmt.fmt.pix.height = i_height;
1257 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1259 msg_Err( p_obj, "Cannot set size to optimal dimensions "
1260 "%ux%u", i_width, i_height );
1266 msg_Warn( p_obj, "Could not find optimal width and height, "
1267 "falling back to driver default." );
1272 width = fmt.fmt.pix.width;
1273 height = fmt.fmt.pix.height;
1275 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
1276 /* Print extra info */
1277 msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
1278 /* Check interlacing */
1279 switch( fmt.fmt.pix.field )
1281 case V4L2_FIELD_NONE:
1282 msg_Dbg( p_obj, "Interlacing setting: progressive" );
1284 case V4L2_FIELD_TOP:
1285 msg_Dbg( p_obj, "Interlacing setting: top field only" );
1287 case V4L2_FIELD_BOTTOM:
1288 msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
1290 case V4L2_FIELD_INTERLACED:
1291 msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
1293 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
1295 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
1297 case V4L2_FIELD_SEQ_TB:
1298 msg_Dbg( p_obj, "Interlacing setting: sequential top bottom (TODO)" );
1300 case V4L2_FIELD_SEQ_BT:
1301 msg_Dbg( p_obj, "Interlacing setting: sequential bottom top (TODO)" );
1303 case V4L2_FIELD_ALTERNATE:
1304 msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
1307 case V4L2_FIELD_INTERLACED_TB:
1308 msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
1309 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
1311 case V4L2_FIELD_INTERLACED_BT:
1312 msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
1313 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
1316 msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
1317 fmt.fmt.pix.field );
1321 /* Look up final fourcc */
1322 p_sys->i_fourcc = 0;
1323 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
1325 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
1327 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
1328 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
1329 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
1330 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
1331 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
1336 /* Buggy driver paranoia */
1337 i_min = fmt.fmt.pix.width * 2;
1338 if( fmt.fmt.pix.bytesperline < i_min )
1339 fmt.fmt.pix.bytesperline = i_min;
1340 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
1341 if( fmt.fmt.pix.sizeimage < i_min )
1342 fmt.fmt.pix.sizeimage = i_min;
1344 /* Init I/O method */
1347 case IO_METHOD_READ:
1348 p_sys->blocksize = fmt.fmt.pix.sizeimage;
1351 case IO_METHOD_MMAP:
1352 if( InitMmap( p_obj, p_sys, i_fd ) )
1354 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
1356 struct v4l2_buffer buf;
1358 memset( &buf, 0, sizeof(buf) );
1359 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1360 buf.memory = V4L2_MEMORY_MMAP;
1363 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
1365 msg_Err( p_obj, "VIDIOC_QBUF failed" );
1370 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1371 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
1373 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
1378 case IO_METHOD_USERPTR:
1379 if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) )
1381 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
1383 struct v4l2_buffer buf;
1385 memset( &buf, 0, sizeof(buf) );
1386 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1387 buf.memory = V4L2_MEMORY_USERPTR;
1389 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
1390 buf.length = p_sys->p_buffers[i].length;
1392 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
1394 msg_Err( p_obj, "VIDIOC_QBUF failed" );
1399 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1400 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
1402 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
1412 int ar = 4 * VOUT_ASPECT_FACTOR / 3;
1413 char *str = var_InheritString( p_obj, CFG_PREFIX"aspect-ratio" );
1414 if( likely(str != NULL) )
1416 const char *delim = strchr( str, ':' );
1418 ar = atoi( str ) * VOUT_ASPECT_FACTOR / atoi( delim + 1 );
1423 es_fmt.video.i_width = width;
1424 es_fmt.video.i_height = height;
1426 /* Get aspect-ratio */
1427 es_fmt.video.i_sar_num = ar * es_fmt.video.i_height;
1428 es_fmt.video.i_sar_den = VOUT_ASPECT_FACTOR * es_fmt.video.i_width;
1431 es_fmt.video.i_frame_rate = lround(f_fps * 1000000.);
1432 es_fmt.video.i_frame_rate_base = 1000000;
1434 demux_t *p_demux = (demux_t *) p_obj;
1435 msg_Dbg( p_obj, "added new video es %4.4s %dx%d",
1436 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
1437 msg_Dbg( p_obj, " frame rate: %f", f_fps );
1439 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );