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 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 *****************************************************************************/
28 * Sections based on the reference V4L2 capture example at
29 * http://v4l2spec.bytesex.org/spec/capture-example.html
32 /*****************************************************************************
34 *****************************************************************************/
43 #include <sys/ioctl.h>
47 #include <vlc_common.h>
48 #include <vlc_plugin.h>
49 #include <vlc_demux.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)." )
85 #define CTRL_RESET_TEXT N_( "Reset controls" )
86 #define CTRL_RESET_LONGTEXT N_( "Reset controls to defaults." )
87 #define BRIGHTNESS_TEXT N_( "Brightness" )
88 #define BRIGHTNESS_LONGTEXT N_( "Picture brightness or black level." )
89 #define BRIGHTNESS_AUTO_TEXT N_( "Automatic brightness" )
90 #define BRIGHTNESS_AUTO_LONGTEXT N_( \
91 "Automatically adjust the picture brightness." )
92 #define CONTRAST_TEXT N_( "Contrast" )
93 #define CONTRAST_LONGTEXT N_( "Picture contrast or luma gain." )
94 #define SATURATION_TEXT N_( "Saturation" )
95 #define SATURATION_LONGTEXT N_( "Picture saturation or chroma gain." )
96 #define HUE_TEXT N_( "Hue" )
97 #define HUE_LONGTEXT N_( "Hue or color balance." )
98 #define HUE_AUTO_TEXT N_( "Automatic hue" )
99 #define HUE_AUTO_LONGTEXT N_( \
100 "Automatically adjust the picture hue." )
101 #define WHITE_BALANCE_TEMP_TEXT N_( "White balance temperature (K)" )
102 #define WHITE_BALANCE_TEMP_LONGTEXT N_( \
103 "White balance temperature as a color temperation in Kelvin " \
104 "(2800 is minimum incandescence, 6500 is maximum daylight)." )
105 #define AUTOWHITEBALANCE_TEXT N_( "Automatic white balance" )
106 #define AUTOWHITEBALANCE_LONGTEXT N_( \
107 "Automatically adjust the picture white balance." )
108 #define REDBALANCE_TEXT N_( "Red balance" )
109 #define REDBALANCE_LONGTEXT N_( \
110 "Red chroma balance." )
111 #define BLUEBALANCE_TEXT N_( "Blue balance" )
112 #define BLUEBALANCE_LONGTEXT N_( \
113 "Blue chroma balance." )
114 #define GAMMA_TEXT N_( "Gamma" )
115 #define GAMMA_LONGTEXT N_( \
117 #define AUTOGAIN_TEXT N_( "Automatic gain" )
118 #define AUTOGAIN_LONGTEXT N_( \
119 "Automatically set the video gain." )
120 #define GAIN_TEXT N_( "Gain" )
121 #define GAIN_LONGTEXT N_( \
123 #define SHARPNESS_TEXT N_( "Sharpness" )
124 #define SHARPNESS_LONGTEXT N_( "Sharpness filter adjust." )
125 #define CHROMA_GAIN_TEXT N_( "Chroma gain" )
126 #define CHROMA_GAIN_LONGTEXT N_( "Chroma gain control." )
127 #define CHROMA_GAIN_AUTO_TEXT N_( "Automatic chroma gain" )
128 #define CHROMA_GAIN_AUTO_LONGTEXT N_( \
129 "Automatically control the chroma gain." )
130 #define POWER_FREQ_TEXT N_( "Power line frequency" )
131 #define POWER_FREQ_LONGTEXT N_( \
132 "Power line frequency anti-flicker filter." )
133 static const int power_freq_vlc[] = { -1,
134 V4L2_CID_POWER_LINE_FREQUENCY_DISABLED,
135 V4L2_CID_POWER_LINE_FREQUENCY_50HZ,
136 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
137 V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
139 static const char *const power_freq_user[] = { N_("Unspecified"),
140 N_("Off"), N_("50 Hz"), N_("60 Hz"), N_("Automatic"),
142 #define BKLT_COMPENSATE_TEXT N_( "Backlight compensation" )
143 #define BKLT_COMPENSATE_LONGTEXT N_( "Backlight compensation." )
144 #define BAND_STOP_FILTER_TEXT N_( "Band-stop filter" )
145 #define BAND_STOP_FILTER_LONGTEXT N_( \
146 "Cut a light band induced by fluorescent lighting (unit undocumented)." )
147 #define HFLIP_TEXT N_( "Horizontal flip" )
148 #define HFLIP_LONGTEXT N_( \
149 "Flip the picture horizontally." )
150 #define VFLIP_TEXT N_( "Vertical flip" )
151 #define VFLIP_LONGTEXT N_( \
152 "Flip the picture vertically." )
153 #define ROTATE_TEXT N_( "Rotate (degrees)" )
154 #define ROTATE_LONGTEXT N_( "Picture rotation angle (in degrees)." )
155 #define COLOR_KILLER_TEXT N_( "Color killer" )
156 #define COLOR_KILLER_LONGTEXT N_( \
157 "Enable the color killer, i.e. switch to black & white picture " \
158 "whenever the signal is weak." )
159 #define COLOR_EFFECT_TEXT N_( "Color effect" )
160 #define COLOR_EFFECT_LONGTEXT N_( "Select a color effect." )
161 static const int colorfx_vlc[] = { -1, V4L2_COLORFX_NONE,
162 V4L2_COLORFX_BW, V4L2_COLORFX_SEPIA, V4L2_COLORFX_NEGATIVE,
163 V4L2_COLORFX_EMBOSS, V4L2_COLORFX_SKETCH, V4L2_COLORFX_SKY_BLUE,
164 V4L2_COLORFX_GRASS_GREEN, V4L2_COLORFX_SKIN_WHITEN, V4L2_COLORFX_VIVID,
166 static const char *const colorfx_user[] = { N_("Unspecified"), N_("None"),
167 N_("Black & white"), N_("Sepia"), N_("Negative"),
168 N_("Emboss"), N_("Sketch"), N_("Sky blue"),
169 N_("Grass green"), N_("Skin whiten"), N_("Vivid"),
172 #define AUDIO_VOLUME_TEXT N_( "Audio volume" )
173 #define AUDIO_VOLUME_LONGTEXT N_( \
174 "Volume of the audio input." )
175 #define AUDIO_BALANCE_TEXT N_( "Audio balance" )
176 #define AUDIO_BALANCE_LONGTEXT N_( \
177 "Balance of the audio input." )
178 #define AUDIO_BASS_TEXT N_( "Bass level" )
179 #define AUDIO_BASS_LONGTEXT N_( \
180 "Bass adjustment of the audio input." )
181 #define AUDIO_TREBLE_TEXT N_( "Treble level" )
182 #define AUDIO_TREBLE_LONGTEXT N_( \
183 "Treble adjustment of the audio input." )
184 #define AUDIO_MUTE_TEXT N_( "Mute" )
185 #define AUDIO_MUTE_LONGTEXT N_( \
187 #define AUDIO_LOUDNESS_TEXT N_( "Loudness mode" )
188 #define AUDIO_LOUDNESS_LONGTEXT N_( \
189 "Loudness mode a.k.a. bass boost." )
191 #define S_CTRLS_TEXT N_("v4l2 driver controls")
192 #define S_CTRLS_LONGTEXT N_( \
193 "Set the v4l2 driver controls to the values specified using a comma " \
194 "separated list optionally encapsulated by curly braces " \
195 "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
196 "To list available controls, increase verbosity (-vvv) " \
197 "or use the v4l2-ctl application." )
199 #define TUNER_TEXT N_("Tuner id")
200 #define TUNER_LONGTEXT N_( \
201 "Tuner id (see debug output)." )
202 #define FREQUENCY_TEXT N_("Frequency")
203 #define FREQUENCY_LONGTEXT N_( \
204 "Tuner frequency in Hz or kHz (see debug output)" )
205 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
206 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
207 "Tuner audio mono/stereo and track selection." )
209 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
210 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
212 static const int tristate_vlc[] = { -1, 0, 1 };
213 static const char *const tristate_user[] = {
214 N_("Unspecified"), N_("Off"), N_("On") };
216 static const v4l2_std_id standards_v4l2[] = { V4L2_STD_UNKNOWN, V4L2_STD_ALL,
217 V4L2_STD_PAL, V4L2_STD_PAL_BG, V4L2_STD_PAL_DK,
219 V4L2_STD_SECAM, V4L2_STD_SECAM_DK,
220 V4L2_STD_MTS, V4L2_STD_525_60, V4L2_STD_625_50,
223 V4L2_STD_B, V4L2_STD_G, V4L2_STD_H, V4L2_STD_L,
224 V4L2_STD_GH, V4L2_STD_DK, V4L2_STD_BG, V4L2_STD_MN,
226 V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
227 V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
228 V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
229 V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP,V4L2_STD_NTSC_443, V4L2_STD_NTSC_M_KR,
230 V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G, V4L2_STD_SECAM_H,
231 V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1, V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
232 V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
234 static const char *const standards_vlc[] = { "", "ALL",
235 /* Pseudo standards */
236 "PAL", "PAL_BG", "PAL_DK",
239 "MTS", "525_60", "625_50",
242 /* Chroma-agnostic ITU standards (PAL/NTSC or PAL/SECAM) */
244 "GH", "DK", "BG", "MN",
246 /* Individual standards */
247 "PAL_B", "PAL_B1", "PAL_G", "PAL_H",
248 "PAL_I", "PAL_D", "PAL_D1", "PAL_K",
249 "PAL_M", "PAL_N", "PAL_Nc", "PAL_60",
250 "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR",
251 "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H",
252 "SECAM_K", "SECAM_K1", "SECAM_L", "SECAM_LC",
253 "ATSC_8_VSB", "ATSC_16_VSB",
255 static const char *const standards_user[] = { N_("Undefined"), N_("All"),
256 "PAL", "PAL B/G", "PAL D/K",
258 "SECAM", "SECAM D/K",
259 N_("Multichannel television sound (MTS)"),
260 N_("525 lines / 60 Hz"), N_("625 lines / 50 Hz"),
263 "PAL/SECAM B", "PAL/SECAM G", "PAL/SECAM H", "PAL/SECAM L",
264 "PAL/SECAM G/H", "PAL/SECAM D/K", "PAL/SECAM B/G", "PAL/NTSC M/N",
266 "PAL B", "PAL B1", "PAL G", "PAL H",
267 "PAL I", "PAL D", "PAL D1", "PAL K",
268 "PAL M", "PAL N", N_("PAL N Argentina"), "PAL 60",
269 "NTSC M", N_("NTSC M Japan"), "NTSC 443", N_("NTSC M South Korea"),
270 "SECAM B", "SECAM D", "SECAM G", "SECAM H",
271 "SECAM K", "SECAM K1", "SECAM L", "SECAM L/C",
272 "ATSC 8-VSB", "ATSC 16-VSB",
275 static const int i_tuner_audio_modes_list[] = {
276 -1, V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
277 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
278 V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
279 static const char *const psz_tuner_audio_modes_list_text[] = {
283 N_( "Primary language (Analog TV tuners only)" ),
284 N_( "Secondary language (Analog TV tuners only)" ),
285 N_( "Second audio program (Analog TV tuners only)" ),
286 N_( "Primary language left, Secondary language right" ) };
288 #define V4L2_DEFAULT "/dev/video0"
291 # define DEFAULT_WIDTH 640
292 # define DEFAULT_HEIGHT 492
295 #ifndef DEFAULT_WIDTH
296 # define DEFAULT_WIDTH (-1)
297 # define DEFAULT_HEIGHT (-1)
301 set_shortname( N_("Video4Linux2") )
302 set_description( N_("Video4Linux2 input") )
303 set_category( CAT_INPUT )
304 set_subcategory( SUBCAT_INPUT_ACCESS )
306 set_section( N_( "Video input" ), NULL )
307 add_string( CFG_PREFIX "dev", "/dev/video0", DEVICE_TEXT, DEVICE_LONGTEXT,
310 add_string( CFG_PREFIX "standard", "",
311 STANDARD_TEXT, STANDARD_LONGTEXT, false )
312 change_string_list( standards_vlc, standards_user, NULL )
314 add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
317 add_integer( CFG_PREFIX "input", 0, INPUT_TEXT, INPUT_LONGTEXT,
319 change_integer_range( 0, 0xFFFFFFFE )
321 add_integer( CFG_PREFIX "audio-input", -1, AUDIO_INPUT_TEXT,
322 AUDIO_INPUT_LONGTEXT, true )
323 change_integer_range( -1, 0xFFFFFFFE )
325 add_obsolete_integer( CFG_PREFIX "io" ) /* since 2.0.0 */
326 add_integer( CFG_PREFIX "width", DEFAULT_WIDTH, WIDTH_TEXT,
327 WIDTH_LONGTEXT, true )
329 add_integer( CFG_PREFIX "height", DEFAULT_HEIGHT, HEIGHT_TEXT,
330 HEIGHT_LONGTEXT, true )
332 add_string( CFG_PREFIX "aspect-ratio", "4:3", ASPECT_TEXT,
333 ASPECT_LONGTEXT, true )
335 add_float( CFG_PREFIX "fps", 0, FPS_TEXT, FPS_LONGTEXT, true )
337 add_obsolete_bool( CFG_PREFIX "use-libv4l2" ) /* since 2.1.0 */
339 set_section( N_( "Tuner" ), NULL )
340 add_integer( CFG_PREFIX "tuner", 0, TUNER_TEXT, TUNER_LONGTEXT,
342 change_integer_range( 0, 0xFFFFFFFE )
344 add_integer( CFG_PREFIX "tuner-frequency", -1, FREQUENCY_TEXT,
345 FREQUENCY_LONGTEXT, true )
346 change_integer_range( -1, 0xFFFFFFFE )
348 add_integer( CFG_PREFIX "tuner-audio-mode", -1, TUNER_AUDIO_MODE_TEXT,
349 TUNER_AUDIO_MODE_LONGTEXT, true )
350 change_integer_list( i_tuner_audio_modes_list,
351 psz_tuner_audio_modes_list_text )
354 set_section( N_( "Controls" ),
355 N_( "Video capture controls (if supported by the device)" ) )
356 add_bool( CFG_PREFIX "controls-reset", false, CTRL_RESET_TEXT,
357 CTRL_RESET_LONGTEXT, true )
359 add_integer( CFG_PREFIX "brightness", -1, BRIGHTNESS_TEXT,
360 BRIGHTNESS_LONGTEXT, true )
361 add_integer( CFG_PREFIX "brightness-auto", -1,
362 BRIGHTNESS_AUTO_TEXT, BRIGHTNESS_AUTO_LONGTEXT, true )
363 change_integer_list( tristate_vlc, tristate_user )
364 add_integer( CFG_PREFIX "contrast", -1, CONTRAST_TEXT,
365 CONTRAST_LONGTEXT, true )
366 add_integer( CFG_PREFIX "saturation", -1, SATURATION_TEXT,
367 SATURATION_LONGTEXT, true )
368 add_integer( CFG_PREFIX "hue", -1, HUE_TEXT,
370 add_integer( CFG_PREFIX "hue-auto", -1,
371 HUE_AUTO_TEXT, HUE_AUTO_LONGTEXT, true )
372 change_integer_list( tristate_vlc, tristate_user )
373 add_obsolete_integer( CFG_PREFIX "black-level" ) /* since Linux 2.6.26 */
374 add_integer( CFG_PREFIX "white-balance-temperature", -1,
375 WHITE_BALANCE_TEMP_TEXT, WHITE_BALANCE_TEMP_LONGTEXT, true )
376 /* Ideally, the range should be 2800-6500 */
377 change_integer_range( -1, 6500 )
378 add_integer( CFG_PREFIX "auto-white-balance", -1,
379 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
380 change_integer_list( tristate_vlc, tristate_user )
381 add_obsolete_integer( CFG_PREFIX"do-white-balance" ) /* since 2.0.0 */
382 add_integer( CFG_PREFIX "red-balance", -1, REDBALANCE_TEXT,
383 REDBALANCE_LONGTEXT, true )
384 add_integer( CFG_PREFIX "blue-balance", -1, BLUEBALANCE_TEXT,
385 BLUEBALANCE_LONGTEXT, true )
386 add_integer( CFG_PREFIX "gamma", -1, GAMMA_TEXT,
387 GAMMA_LONGTEXT, true )
388 add_integer( CFG_PREFIX "autogain", -1, AUTOGAIN_TEXT,
389 AUTOGAIN_LONGTEXT, true )
390 change_integer_list( tristate_vlc, tristate_user )
391 add_integer( CFG_PREFIX "gain", -1, GAIN_TEXT,
392 GAIN_LONGTEXT, true )
393 add_integer( CFG_PREFIX "sharpness", -1,
394 SHARPNESS_TEXT, SHARPNESS_LONGTEXT, true )
395 add_integer( CFG_PREFIX "chroma-gain", -1,
396 CHROMA_GAIN_TEXT, CHROMA_GAIN_LONGTEXT, true )
397 add_integer( CFG_PREFIX "chroma-gain-auto", -1,
398 CHROMA_GAIN_AUTO_TEXT, CHROMA_GAIN_AUTO_LONGTEXT, true )
399 add_integer( CFG_PREFIX"power-line-frequency", -1,
400 POWER_FREQ_TEXT, POWER_FREQ_LONGTEXT, true )
401 change_integer_list( power_freq_vlc, power_freq_user )
402 add_integer( CFG_PREFIX"backlight-compensation", -1,
403 BKLT_COMPENSATE_TEXT, BKLT_COMPENSATE_LONGTEXT, true )
404 add_integer( CFG_PREFIX "band-stop-filter", -1,
405 BAND_STOP_FILTER_TEXT, BAND_STOP_FILTER_LONGTEXT, true )
406 add_bool( CFG_PREFIX "hflip", false, HFLIP_TEXT, HFLIP_LONGTEXT, true )
407 add_bool( CFG_PREFIX "vflip", false, VFLIP_TEXT, VFLIP_LONGTEXT, true )
408 add_integer( CFG_PREFIX "rotate", -1, ROTATE_TEXT, ROTATE_LONGTEXT, true )
409 change_integer_range( -1, 359 )
410 add_obsolete_integer( CFG_PREFIX "hcenter" ) /* since Linux 2.6.26 */
411 add_obsolete_integer( CFG_PREFIX "vcenter" ) /* since Linux 2.6.26 */
412 add_integer( CFG_PREFIX"color-killer", -1,
413 COLOR_KILLER_TEXT, COLOR_KILLER_LONGTEXT, true )
414 change_integer_list( tristate_vlc, tristate_user )
415 add_integer( CFG_PREFIX"color-effect", -1,
416 COLOR_EFFECT_TEXT, COLOR_EFFECT_LONGTEXT, true )
417 change_integer_list( colorfx_vlc, colorfx_user )
419 add_integer( CFG_PREFIX "audio-volume", -1, AUDIO_VOLUME_TEXT,
420 AUDIO_VOLUME_LONGTEXT, true )
421 add_integer( CFG_PREFIX "audio-balance", -1, AUDIO_BALANCE_TEXT,
422 AUDIO_BALANCE_LONGTEXT, true )
423 add_bool( CFG_PREFIX "audio-mute", false, AUDIO_MUTE_TEXT,
424 AUDIO_MUTE_LONGTEXT, true )
425 add_integer( CFG_PREFIX "audio-bass", -1, AUDIO_BASS_TEXT,
426 AUDIO_BASS_LONGTEXT, true )
427 add_integer( CFG_PREFIX "audio-treble", -1, AUDIO_TREBLE_TEXT,
428 AUDIO_TREBLE_LONGTEXT, true )
429 add_bool( CFG_PREFIX "audio-loudness", false, AUDIO_LOUDNESS_TEXT,
430 AUDIO_LOUDNESS_LONGTEXT, true )
431 add_string( CFG_PREFIX "set-ctrls", NULL, S_CTRLS_TEXT,
432 S_CTRLS_LONGTEXT, true )
435 add_obsolete_string( CFG_PREFIX "adev" )
436 add_obsolete_integer( CFG_PREFIX "audio-method" )
437 add_obsolete_bool( CFG_PREFIX "stereo" )
438 add_obsolete_integer( CFG_PREFIX "samplerate" )
440 add_shortcut( "v4l2" )
441 set_capability( "access_demux", 0 )
442 set_callbacks( DemuxOpen, DemuxClose )
445 add_shortcut( "v4l2", "v4l2c" )
446 set_description( N_("Video4Linux2 Compressed A/V") )
447 set_capability( "access", 0 )
448 /* use these when open as access_demux fails; VLC will use another demux */
449 set_callbacks( AccessOpen, AccessClose )
453 /*****************************************************************************
454 * Access: local prototypes
455 *****************************************************************************/
457 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
462 vlc_fourcc_t i_fourcc;
466 } v4l2chroma_to_fourcc[] =
469 { V4L2_PIX_FMT_GREY, VLC_CODEC_GREY, 0, 0, 0 },
470 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
471 { V4L2_PIX_FMT_RGB555, VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
472 { V4L2_PIX_FMT_RGB565, VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
473 /* Won't work since we don't know how to handle such gmask values
475 { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
476 { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
478 { V4L2_PIX_FMT_BGR24, VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
479 { V4L2_PIX_FMT_RGB24, VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
480 { V4L2_PIX_FMT_BGR32, VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
481 { V4L2_PIX_FMT_RGB32, VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
482 { V4L2_PIX_FMT_YUYV, VLC_CODEC_YUYV, 0, 0, 0 },
483 { V4L2_PIX_FMT_UYVY, VLC_CODEC_UYVY, 0, 0, 0 },
484 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
485 { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
486 { V4L2_PIX_FMT_YVU420, VLC_CODEC_YV12, 0, 0, 0 },
487 { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
488 { V4L2_PIX_FMT_YUV410, VLC_CODEC_I410, 0, 0, 0 },
490 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
492 { V4L2_PIX_FMT_YUV420, VLC_CODEC_I420, 0, 0, 0 },
493 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_CODEC_RGB32 }, */
495 /* Compressed data types */
496 { V4L2_PIX_FMT_MJPEG, VLC_CODEC_MJPG, 0, 0, 0 },
497 { V4L2_PIX_FMT_JPEG, VLC_CODEC_JPEG, 0, 0, 0 },
499 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
500 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
506 * List of V4L2 chromas were confident enough to use as fallbacks if the
507 * user hasn't provided a --v4l2-chroma value.
509 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
511 static const uint32_t p_chroma_fallbacks[] =
512 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
513 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
514 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
517 * Parses a V4L2 MRL into VLC object variables.
519 void ParseMRL( vlc_object_t *obj, const char *mrl )
521 const char *p = strchr( mrl, ':' );
526 var_LocationParse( obj, p + 1, CFG_PREFIX );
528 dev = strndup( mrl, p - mrl );
538 var_Create( obj, CFG_PREFIX"dev", VLC_VAR_STRING );
539 var_SetString( obj, CFG_PREFIX"dev", dev );
544 int SetupAudio (vlc_object_t *obj, int fd,
545 const struct v4l2_input *restrict input)
547 if (input->audioset == 0)
549 msg_Dbg (obj, "no audio input available");
552 msg_Dbg (obj, "available audio inputs: 0x%08"PRIX32, input->audioset);
554 uint32_t idx = var_InheritInteger (obj, CFG_PREFIX"audio-input");
555 if (idx == (uint32_t)-1)
557 msg_Dbg (obj, "no audio input selected");
560 if (((1 << idx) & input->audioset) == 0)
562 msg_Warn (obj, "skipped unavailable audio input %"PRIu32, idx);
566 /* TODO: Enumerate other selectable audio inputs. How to expose them? */
567 struct v4l2_audio enumaudio = { .index = idx };
569 if (v4l2_ioctl (fd, VIDIOC_ENUMAUDIO, &enumaudio) < 0)
571 msg_Err (obj, "cannot get audio input %"PRIu32" properties: %m", idx);
575 msg_Dbg (obj, "audio input %"PRIu32" (%s) is %s"
576 " (capabilities: 0x%08"PRIX32")", enumaudio.index, enumaudio.name,
577 (enumaudio.capability & V4L2_AUDCAP_STEREO) ? "Stereo" : "Mono",
578 enumaudio.capability);
579 if (enumaudio.capability & V4L2_AUDCAP_AVL)
580 msg_Dbg (obj, " supports Automatic Volume Level");
583 struct v4l2_audio audio = { .index = idx };
585 if (v4l2_ioctl (fd, VIDIOC_S_AUDIO, &audio) < 0)
587 msg_Err (obj, "cannot select audio input %"PRIu32": %m", idx);
590 msg_Dbg (obj, "selected audio input %"PRIu32, idx);
594 /*****************************************************************************
595 * GrabVideo: Grab a video frame
596 *****************************************************************************/
597 block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
600 struct v4l2_buffer buf;
602 /* Grab Video Frame */
606 memset( &buf, 0, sizeof(buf) );
607 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
608 buf.memory = V4L2_MEMORY_MMAP;
610 /* Wait for next frame */
611 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
618 /* Could ignore EIO, see spec. */
621 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
626 if( buf.index >= p_sys->i_nbuffers ) {
627 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
631 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
636 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
638 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
639 block_Release( p_block );
645 case IO_METHOD_USERPTR:
646 memset( &buf, 0, sizeof(buf) );
647 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
648 buf.memory = V4L2_MEMORY_USERPTR;
650 /* Wait for next frame */
651 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
658 /* Could ignore EIO, see spec. */
661 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
668 for( i = 0; i < p_sys->i_nbuffers; i++ )
670 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
671 buf.length == p_sys->p_buffers[i].length ) break;
674 if( i >= p_sys->i_nbuffers )
676 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
680 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
685 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
687 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
688 block_Release( p_block );
698 /*****************************************************************************
699 * ProcessVideoFrame: Helper function to take a buffer and copy it into
701 *****************************************************************************/
702 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
706 if( !p_frame ) return NULL;
709 if( !( p_block = block_New( p_demux, i_size ) ) )
711 msg_Warn( p_demux, "Cannot get new block" );
716 memcpy( p_block->p_buffer, p_frame, i_size );
721 /*****************************************************************************
722 * Helper function to initalise video IO using the mmap method
723 *****************************************************************************/
724 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
726 struct v4l2_requestbuffers req;
728 memset( &req, 0, sizeof(req) );
730 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
731 req.memory = V4L2_MEMORY_MMAP;
733 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
735 msg_Err( p_demux, "device does not support mmap I/O" );
741 msg_Err( p_demux, "insufficient buffers" );
745 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
746 if( unlikely(!p_sys->p_buffers) )
749 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
751 struct v4l2_buffer buf;
753 memset( &buf, 0, sizeof(buf) );
754 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
755 buf.memory = V4L2_MEMORY_MMAP;
756 buf.index = p_sys->i_nbuffers;
758 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
760 msg_Err( p_demux, "VIDIOC_QUERYBUF: %m" );
764 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
765 p_sys->p_buffers[p_sys->i_nbuffers].start =
766 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
768 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
770 msg_Err( p_demux, "mmap failed: %m" );
778 /*****************************************************************************
779 * Helper function to initalise video IO using the userbuf method
780 *****************************************************************************/
781 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
783 struct v4l2_requestbuffers req;
784 unsigned int i_page_size;
786 i_page_size = sysconf(_SC_PAGESIZE);
787 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
789 memset( &req, 0, sizeof(req) );
791 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
792 req.memory = V4L2_MEMORY_USERPTR;
794 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
796 msg_Err( p_demux, "device does not support user pointer i/o" );
800 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
801 if( !p_sys->p_buffers )
804 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
806 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
807 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
808 /* boundary */ i_page_size, i_buffer_size ) )
816 * \return true if the specified V4L2 pixel format is
817 * in the array of supported formats returned by the driver
819 static bool IsPixelFormatSupported( struct v4l2_fmtdesc *codecs, size_t n,
820 unsigned int i_pixelformat )
822 for( size_t i = 0; i < n; i++ )
823 if( codecs[i].pixelformat == i_pixelformat )
829 int InitVideo( vlc_object_t *p_obj, int i_fd, demux_sys_t *p_sys,
832 struct v4l2_cropcap cropcap;
833 struct v4l2_crop crop;
834 struct v4l2_format fmt;
836 enum v4l2_buf_type buf_type;
839 /* Get device capabilites */
840 struct v4l2_capability cap;
841 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &cap ) < 0 )
843 msg_Err( p_obj, "cannot get video capabilities: %m" );
847 msg_Dbg( p_obj, "device %s using driver %s (version %u.%u.%u) on %s",
848 cap.card, cap.driver, (cap.version >> 16) & 0xFF,
849 (cap.version >> 8) & 0xFF, cap.version & 0xFF, cap.bus_info );
850 msg_Dbg( p_obj, "the device has the capabilities: 0x%08X",
852 msg_Dbg( p_obj, " (%c) Video Capture, (%c) Audio, (%c) Tuner, (%c) Radio",
853 ( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
854 ( cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
855 ( cap.capabilities & V4L2_CAP_TUNER ? 'X':' '),
856 ( cap.capabilities & V4L2_CAP_RADIO ? 'X':' ') );
857 msg_Dbg( p_obj, " (%c) Read/Write, (%c) Streaming, (%c) Asynchronous",
858 ( cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
859 ( cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
860 ( cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
862 if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE))
864 msg_Err (p_obj, "not a video capture device");
868 if( cap.capabilities & V4L2_CAP_STREAMING )
869 p_sys->io = IO_METHOD_MMAP;
870 else if( cap.capabilities & V4L2_CAP_READWRITE )
871 p_sys->io = IO_METHOD_READ;
874 msg_Err( p_obj, "no supported I/O method" );
878 /* Now, enumerate all the video inputs. This is useless at the moment
879 since we have no way to present that info to the user except with
881 struct v4l2_input input;
882 unsigned index = var_InheritInteger( p_obj, CFG_PREFIX"input" );
885 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &input ) >= 0 )
887 msg_Dbg( p_obj, "video input %u (%s) has type: %s %c",
888 input.index, input.name,
889 input.type == V4L2_INPUT_TYPE_TUNER
890 ? "Tuner adapter" : "External analog input",
891 input.index == index ? '*' : ' ' );
896 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &index ) < 0 )
898 msg_Err( p_obj, "cannot set input %u: %m", index );
901 msg_Dbg( p_obj, "input set to %u", index );
903 /* Select standard */
905 const char *stdname = var_InheritString( p_obj, CFG_PREFIX"standard" );
906 if( stdname != NULL )
908 v4l2_std_id std = strtoull( stdname, NULL, 0 );
911 const size_t n = sizeof(standards_vlc) / sizeof(*standards_vlc);
913 static_assert(sizeof(standards_vlc) / sizeof(*standards_vlc)
914 == sizeof (standards_v4l2) / sizeof (*standards_v4l2),
915 "Inconsistent standards tables");
916 static_assert(sizeof(standards_vlc) / sizeof(*standards_vlc)
917 == sizeof (standards_user) / sizeof (*standards_user),
918 "Inconsistent standards tables");
920 for( size_t i = 0; i < n; i++ )
921 if( strcasecmp( stdname, standards_vlc[i] ) == 0 )
923 std = standards_v4l2[i];
928 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &std ) < 0
929 || v4l2_ioctl( i_fd, VIDIOC_G_STD, &std ) < 0 )
931 msg_Err( p_obj, "cannot set standard 0x%"PRIx64": %m", std );
934 msg_Dbg( p_obj, "standard set to 0x%"PRIx64":", std );
935 bottom_first = std == V4L2_STD_NTSC;
938 bottom_first = false;
940 /* Set audio input */
941 SetupAudio (p_obj, i_fd, &input);
943 /* List tuner caps */
944 if( cap.capabilities & V4L2_CAP_TUNER )
946 struct v4l2_tuner tuner;
947 uint32_t idx = var_CreateGetInteger( p_obj, CFG_PREFIX"tuner" );
948 enum v4l2_tuner_type type = V4L2_TUNER_RADIO;
951 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
953 if( tuner.index == idx )
957 (tuner.capability & V4L2_TUNER_CAP_LOW) ? "Hz" : "kHz";
958 msg_Dbg( p_obj, "tuner %u (%s) has type: %s, "
959 "frequency range: %.1f %s -> %.1f %s", tuner.index,
961 tuner.type == V4L2_TUNER_RADIO ? "Radio" : "Analog TV",
962 tuner.rangelow * 62.5, unit,
963 tuner.rangehigh * 62.5, unit );
965 struct v4l2_frequency frequency = { .tuner = tuner.index };
966 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
968 msg_Err( p_obj, "cannot get tuner frequency: %m" );
971 msg_Dbg( p_obj, "tuner %u (%s) frequency: %.1f %s", tuner.index,
972 tuner.name, frequency.frequency * 62.5, unit );
977 uint32_t freq = var_InheritInteger( p_obj,
978 CFG_PREFIX"tuner-frequency" );
979 if( freq != (uint32_t)-1 )
981 struct v4l2_frequency frequency = {
984 .frequency = freq / 62.5,
987 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
989 msg_Err( p_obj, "cannot set tuner frequency: %m" );
992 msg_Dbg( p_obj, "tuner frequency set" );
995 /* Set the tuner audio mode */
996 int32_t audmode = var_InheritInteger( p_obj,
997 CFG_PREFIX"tuner-audio-mode" );
1000 struct v4l2_tuner tuner = {
1005 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1007 msg_Err( p_obj, "cannot set tuner audio mode: %m" );
1010 msg_Dbg( p_obj, "tuner audio mode set" );
1014 /* Probe for available chromas */
1015 struct v4l2_fmtdesc *codecs = NULL;
1016 uint_fast32_t ncodec = 0;
1017 if( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
1019 struct v4l2_fmtdesc codec = {
1021 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1024 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
1025 codec.index = ++ncodec;
1027 codecs = malloc( ncodec * sizeof( *codecs ) );
1028 if( unlikely(codecs == NULL) )
1031 for( uint_fast32_t i = 0; i < ncodec; i++ )
1033 codecs[i].index = i;
1034 codecs[i].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1036 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codecs[i] ) < 0 )
1038 msg_Err( p_obj, "cannot get codec description: %m" );
1042 /* only print if vlc supports the format */
1043 char fourcc_v4l2[5];
1044 memset( fourcc_v4l2, 0, sizeof( fourcc_v4l2 ) );
1045 vlc_fourcc_to_char( codecs[i].pixelformat, fourcc_v4l2 );
1047 bool b_codec_supported = false;
1048 for( unsigned j = 0; v4l2chroma_to_fourcc[j].i_v4l2 != 0; j++ )
1050 if( v4l2chroma_to_fourcc[j].i_v4l2 == codecs[i].pixelformat )
1053 memset( fourcc, 0, sizeof( fourcc ) );
1054 vlc_fourcc_to_char( v4l2chroma_to_fourcc[j].i_fourcc,
1056 msg_Dbg( p_obj, "device supports chroma %4.4s [%s, %s]",
1057 fourcc, codecs[i].description, fourcc_v4l2 );
1058 b_codec_supported = true;
1061 if( !b_codec_supported )
1063 msg_Dbg( p_obj, "device codec %4.4s (%s) not supported",
1064 fourcc_v4l2, codecs[i].description );
1069 /* TODO: Move the resolution stuff up here */
1070 /* if MPEG encoder card, no need to do anything else after this */
1071 p_sys->controls = ControlsInit( p_obj, i_fd );
1073 /* Reset Cropping */
1074 memset( &cropcap, 0, sizeof(cropcap) );
1075 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1076 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1078 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1079 crop.c = cropcap.defrect; /* reset to default */
1080 if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
1082 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1087 /* Cropping not supported. */
1090 /* Errors ignored. */
1097 /* Try and find default resolution if not specified */
1098 int width = var_InheritInteger( p_obj, CFG_PREFIX"width" );
1099 int height = var_InheritInteger( p_obj, CFG_PREFIX"height" );
1101 memset( &fmt, 0, sizeof(fmt) );
1102 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1104 if( width <= 0 || height <= 0 )
1106 /* Use current width and height settings */
1107 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
1109 msg_Err( p_obj, "cannot get default width and height: %m" );
1113 msg_Dbg( p_obj, "found default width and height of %ux%u",
1114 fmt.fmt.pix.width, fmt.fmt.pix.height );
1116 if( width < 0 || height < 0 )
1118 msg_Dbg( p_obj, "will try to find optimal width and height" );
1123 /* Use user specified width and height */
1124 msg_Dbg( p_obj, "trying specified size %dx%d", width, height );
1125 fmt.fmt.pix.width = width;
1126 fmt.fmt.pix.height = height;
1129 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1134 char *reqchroma = var_InheritString( p_obj, CFG_PREFIX"chroma" );
1136 /* Test and set Chroma */
1137 fmt.fmt.pix.pixelformat = 0;
1138 if( reqchroma != NULL )
1140 /* User specified chroma */
1141 const vlc_fourcc_t i_requested_fourcc =
1142 vlc_fourcc_GetCodecFromString( VIDEO_ES, reqchroma );
1144 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
1146 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
1148 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
1152 /* Try and set user chroma */
1153 bool b_error = !IsPixelFormatSupported( codecs, ncodec,
1154 fmt.fmt.pix.pixelformat );
1155 if( !b_error && fmt.fmt.pix.pixelformat )
1157 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1159 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1160 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1162 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1169 msg_Warn( p_obj, "requested chroma %s not supported. "
1170 " Trying default.", reqchroma );
1171 fmt.fmt.pix.pixelformat = 0;
1176 /* If no user specified chroma, find best */
1177 /* This also decides if MPEG encoder card or not */
1178 if( !fmt.fmt.pix.pixelformat )
1181 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
1183 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
1184 if( IsPixelFormatSupported( codecs, ncodec,
1185 fmt.fmt.pix.pixelformat ) )
1187 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1189 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1190 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1192 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1195 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
1197 msg_Warn( p_obj, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
1202 if( width < 0 || height < 0 )
1204 f_fps = var_InheritFloat( p_obj, CFG_PREFIX"fps" );
1207 f_fps = GetAbsoluteMaxFrameRate( p_obj, i_fd,
1208 fmt.fmt.pix.pixelformat );
1209 msg_Dbg( p_obj, "Found maximum framerate of %f", f_fps );
1211 uint32_t i_width, i_height;
1212 GetMaxDimensions( p_obj, i_fd,
1213 fmt.fmt.pix.pixelformat, f_fps,
1214 &i_width, &i_height );
1215 if( i_width || i_height )
1217 msg_Dbg( p_obj, "Found optimal dimensions for framerate %f "
1218 "of %ux%u", f_fps, i_width, i_height );
1219 fmt.fmt.pix.width = i_width;
1220 fmt.fmt.pix.height = i_height;
1221 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1223 msg_Err( p_obj, "Cannot set size to optimal dimensions "
1224 "%ux%u", i_width, i_height );
1230 msg_Warn( p_obj, "Could not find optimal width and height, "
1231 "falling back to driver default." );
1236 width = fmt.fmt.pix.width;
1237 height = fmt.fmt.pix.height;
1239 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
1240 /* Print extra info */
1241 msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
1242 /* Check interlacing */
1243 switch( fmt.fmt.pix.field )
1245 case V4L2_FIELD_NONE:
1246 msg_Dbg( p_obj, "Interlacing setting: progressive" );
1248 case V4L2_FIELD_TOP:
1249 msg_Dbg( p_obj, "Interlacing setting: top field only" );
1251 case V4L2_FIELD_BOTTOM:
1252 msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
1254 case V4L2_FIELD_INTERLACED:
1255 msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
1257 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
1259 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
1261 case V4L2_FIELD_SEQ_TB:
1262 msg_Dbg( p_obj, "Interlacing setting: sequential top bottom (TODO)" );
1264 case V4L2_FIELD_SEQ_BT:
1265 msg_Dbg( p_obj, "Interlacing setting: sequential bottom top (TODO)" );
1267 case V4L2_FIELD_ALTERNATE:
1268 msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
1271 case V4L2_FIELD_INTERLACED_TB:
1272 msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
1273 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
1275 case V4L2_FIELD_INTERLACED_BT:
1276 msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
1277 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
1280 msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
1281 fmt.fmt.pix.field );
1285 /* Look up final fourcc */
1286 p_sys->i_fourcc = 0;
1287 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
1289 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
1291 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
1292 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
1293 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
1294 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
1295 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
1300 /* Buggy driver paranoia */
1301 i_min = fmt.fmt.pix.width * 2;
1302 if( fmt.fmt.pix.bytesperline < i_min )
1303 fmt.fmt.pix.bytesperline = i_min;
1304 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
1305 if( fmt.fmt.pix.sizeimage < i_min )
1306 fmt.fmt.pix.sizeimage = i_min;
1308 /* Init I/O method */
1311 case IO_METHOD_READ:
1312 p_sys->blocksize = fmt.fmt.pix.sizeimage;
1315 case IO_METHOD_MMAP:
1316 if( InitMmap( p_obj, p_sys, i_fd ) )
1318 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
1320 struct v4l2_buffer buf;
1322 memset( &buf, 0, sizeof(buf) );
1323 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1324 buf.memory = V4L2_MEMORY_MMAP;
1327 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
1329 msg_Err( p_obj, "VIDIOC_QBUF failed" );
1334 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1335 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
1337 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
1342 case IO_METHOD_USERPTR:
1343 if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) )
1345 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
1347 struct v4l2_buffer buf;
1349 memset( &buf, 0, sizeof(buf) );
1350 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1351 buf.memory = V4L2_MEMORY_USERPTR;
1353 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
1354 buf.length = p_sys->p_buffers[i].length;
1356 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
1358 msg_Err( p_obj, "VIDIOC_QBUF failed" );
1363 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1364 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
1366 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
1376 int ar = 4 * VOUT_ASPECT_FACTOR / 3;
1377 char *str = var_InheritString( p_obj, CFG_PREFIX"aspect-ratio" );
1378 if( likely(str != NULL) )
1380 const char *delim = strchr( str, ':' );
1382 ar = atoi( str ) * VOUT_ASPECT_FACTOR / atoi( delim + 1 );
1387 es_fmt.video.i_width = width;
1388 es_fmt.video.i_height = height;
1390 /* Get aspect-ratio */
1391 es_fmt.video.i_sar_num = ar * es_fmt.video.i_height;
1392 es_fmt.video.i_sar_den = VOUT_ASPECT_FACTOR * es_fmt.video.i_width;
1395 es_fmt.video.i_frame_rate = lround(f_fps * 1000000.);
1396 es_fmt.video.i_frame_rate_base = 1000000;
1398 demux_t *p_demux = (demux_t *) p_obj;
1399 msg_Dbg( p_obj, "added new video es %4.4s %dx%d",
1400 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
1401 msg_Dbg( p_obj, " frame rate: %f", f_fps );
1403 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );