1 /*****************************************************************************
2 * v4l2.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 CONTRAST_TEXT N_( "Contrast" )
96 #define CONTRAST_LONGTEXT N_( "Picture contrast or luma gain." )
97 #define SATURATION_TEXT N_( "Saturation" )
98 #define SATURATION_LONGTEXT N_( "Picture saturation or chroma gain." )
99 #define HUE_TEXT N_( "Hue" )
100 #define HUE_LONGTEXT N_( "Hue or color balance." )
101 #define HUE_AUTO_TEXT N_( "Automatic hue" )
102 #define HUE_AUTO_LONGTEXT N_( \
103 "Automatically adjust the picture hue." )
104 #define WHITE_BALANCE_TEMP_TEXT N_( "White balance temperature (K)" )
105 #define WHITE_BALANCE_TEMP_LONGTEXT N_( \
106 "White balance temperature as a color temperation in Kelvin " \
107 "(2800 is minimum incandescence, 6500 is maximum daylight)." )
108 #define AUTOWHITEBALANCE_TEXT N_( "Automatic white balance" )
109 #define AUTOWHITEBALANCE_LONGTEXT N_( \
110 "Automatically adjust the picture white balance." )
111 #define REDBALANCE_TEXT N_( "Red balance" )
112 #define REDBALANCE_LONGTEXT N_( \
113 "Red chroma balance." )
114 #define BLUEBALANCE_TEXT N_( "Blue balance" )
115 #define BLUEBALANCE_LONGTEXT N_( \
116 "Blue chroma balance." )
117 #define GAMMA_TEXT N_( "Gamma" )
118 #define GAMMA_LONGTEXT N_( \
120 #define EXPOSURE_TEXT N_( "Exposure" )
121 #define EXPOSURE_LONGTEXT N_( \
123 #define AUTOGAIN_TEXT N_( "Automatic gain/exposure" )
124 #define AUTOGAIN_LONGTEXT N_( \
125 "Automatically set the video gain or exposure." )
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,
144 static const char *const power_freq_user[] = { N_("Unspecified"),
145 N_("Off"), N_("50 Hz"), N_("60 Hz"),
147 #define BKLT_COMPENSATE_TEXT N_( "Backlight compensation" )
148 #define BKLT_COMPENSATE_LONGTEXT N_( "Backlight compensation." )
149 #define HFLIP_TEXT N_( "Horizontal flip" )
150 #define HFLIP_LONGTEXT N_( \
151 "Flip the picture horizontally." )
152 #define VFLIP_TEXT N_( "Vertical flip" )
153 #define VFLIP_LONGTEXT N_( \
154 "Flip the picture vertically." )
155 #define ROTATE_TEXT N_( "Rotate (degrees)" )
156 #define ROTATE_LONGTEXT N_( "Picture rotation angle (in degrees)." )
157 #define COLOR_KILLER_TEXT N_( "Color killer" )
158 #define COLOR_KILLER_LONGTEXT N_( \
159 "Enable the color killer, i.e. switch to black & white picture " \
160 "whenever the signal is weak." )
161 #define COLOR_EFFECT_TEXT N_( "Color effect" )
162 #define COLOR_EFFECT_LONGTEXT N_( "Select a color effect." )
163 static const int colorfx_vlc[] = { -1, V4L2_COLORFX_NONE,
164 V4L2_COLORFX_BW, V4L2_COLORFX_SEPIA, V4L2_COLORFX_NEGATIVE,
165 V4L2_COLORFX_EMBOSS, V4L2_COLORFX_SKETCH, V4L2_COLORFX_SKY_BLUE,
166 V4L2_COLORFX_GRASS_GREEN, V4L2_COLORFX_SKIN_WHITEN, V4L2_COLORFX_VIVID,
168 static const char *const colorfx_user[] = { N_("Unspecified"), N_("None"),
169 N_("Black & white"), N_("Sepia"), N_("Negative"),
170 N_("Emboss"), N_("Sketch"), N_("Sky blue"),
171 N_("Grass green"), N_("Skin whithen"), N_("Vivid"),
174 #define AUDIO_VOLUME_TEXT N_( "Audio volume" )
175 #define AUDIO_VOLUME_LONGTEXT N_( \
176 "Volume of the audio input." )
177 #define AUDIO_BALANCE_TEXT N_( "Audio balance" )
178 #define AUDIO_BALANCE_LONGTEXT N_( \
179 "Balance of the audio input." )
180 #define AUDIO_BASS_TEXT N_( "Bass level" )
181 #define AUDIO_BASS_LONGTEXT N_( \
182 "Bass adjustment of the audio input." )
183 #define AUDIO_TREBLE_TEXT N_( "Treble level" )
184 #define AUDIO_TREBLE_LONGTEXT N_( \
185 "Treble adjustment of the audio input." )
186 #define AUDIO_MUTE_TEXT N_( "Mute" )
187 #define AUDIO_MUTE_LONGTEXT N_( \
189 #define AUDIO_LOUDNESS_TEXT N_( "Loudness mode" )
190 #define AUDIO_LOUDNESS_LONGTEXT N_( \
191 "Loudness mode a.k.a. bass boost." )
193 #define S_CTRLS_TEXT N_("v4l2 driver controls")
194 #define S_CTRLS_LONGTEXT N_( \
195 "Set the v4l2 driver controls to the values specified using a comma " \
196 "separated list optionally encapsulated by curly braces " \
197 "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
198 "To list available controls, increase verbosity (-vvv) " \
199 "or use the v4l2-ctl application." )
201 #define TUNER_TEXT N_("Tuner id")
202 #define TUNER_LONGTEXT N_( \
203 "Tuner id (see debug output)." )
204 #define FREQUENCY_TEXT N_("Frequency")
205 #define FREQUENCY_LONGTEXT N_( \
206 "Tuner frequency in Hz or kHz (see debug output)" )
207 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
208 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
209 "Tuner audio mono/stereo and track selection." )
211 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
212 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
214 static const int tristate_vlc[] = { -1, 0, 1 };
215 static const char *const tristate_user[] = {
216 N_("Unspecified"), N_("Off"), N_("On") };
218 static const v4l2_std_id standards_v4l2[] = { V4L2_STD_UNKNOWN, V4L2_STD_ALL,
219 V4L2_STD_PAL, V4L2_STD_PAL_BG, V4L2_STD_PAL_DK,
221 V4L2_STD_SECAM, V4L2_STD_SECAM_DK,
222 V4L2_STD_525_60, V4L2_STD_625_50,
225 V4L2_STD_MN, V4L2_STD_B, V4L2_STD_GH, V4L2_STD_DK,
227 V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
228 V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
229 V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
230 V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP,V4L2_STD_NTSC_443, V4L2_STD_NTSC_M_KR,
231 V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G, V4L2_STD_SECAM_H,
232 V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1, V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
233 V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
235 static const char *const standards_vlc[] = { "", "ALL",
236 /* Pseudo standards */
237 "PAL", "PAL_BG", "PAL_DK",
243 /* Areas (PAL/NTSC or PAL/SECAM) */
244 "MN", "B", "GH", "DK",
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_("525 lines / 60 Hz"), N_("625 lines / 50 Hz"),
263 "PAL/SECAM B", "PAL/SECAM G/H", "PAL/SECAM D/K",
265 "PAL B", "PAL B1", "PAL G", "PAL H",
266 "PAL I", "PAL D", "PAL D1", "PAL K",
267 "PAL M", "PAL N", N_("PAL N Argentina"), "PAL 60",
268 "NTSC M", N_("NTSC M Japan"), "NTSC 443", N_("NTSC M South Korea"),
269 "SECAM B", "SECAM D", "SECAM G", "SECAM H",
270 "SECAM K", "SECAM K1", "SECAM L", "SECAM L/C",
271 "ATSC 8-VSB", "ATSC 16-VSB",
274 static const int i_tuner_audio_modes_list[] = {
275 -1, V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
276 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
277 V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
278 static const char *const psz_tuner_audio_modes_list_text[] = {
282 N_( "Primary language (Analog TV tuners only)" ),
283 N_( "Secondary language (Analog TV tuners only)" ),
284 N_( "Second audio program (Analog TV tuners only)" ),
285 N_( "Primary language left, Secondary language right" ) };
287 #define V4L2_DEFAULT "/dev/video0"
290 # define DEFAULT_WIDTH 640
291 # define DEFAULT_HEIGHT 492
294 #ifndef DEFAULT_WIDTH
295 # define DEFAULT_WIDTH (-1)
296 # define DEFAULT_HEIGHT (-1)
300 set_shortname( N_("Video4Linux2") )
301 set_description( N_("Video4Linux2 input") )
302 set_category( CAT_INPUT )
303 set_subcategory( SUBCAT_INPUT_ACCESS )
305 set_section( N_( "Video input" ), NULL )
306 add_string( CFG_PREFIX "dev", "/dev/video0", DEVICE_TEXT, DEVICE_LONGTEXT,
309 add_string( CFG_PREFIX "standard", "",
310 STANDARD_TEXT, STANDARD_LONGTEXT, false )
311 change_string_list( standards_vlc, standards_user, NULL )
313 add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
316 add_integer( CFG_PREFIX "input", 0, INPUT_TEXT, INPUT_LONGTEXT,
318 change_integer_range( 0, 0xFFFFFFFE )
320 add_integer( CFG_PREFIX "audio-input", -1, AUDIO_INPUT_TEXT,
321 AUDIO_INPUT_LONGTEXT, true )
322 change_integer_range( -1, 0xFFFFFFFE )
324 add_obsolete_integer( CFG_PREFIX "io" ) /* since 1.2.0 */
325 add_integer( CFG_PREFIX "width", DEFAULT_WIDTH, WIDTH_TEXT,
326 WIDTH_LONGTEXT, true )
328 add_integer( CFG_PREFIX "height", DEFAULT_HEIGHT, HEIGHT_TEXT,
329 HEIGHT_LONGTEXT, true )
331 add_string( CFG_PREFIX "aspect-ratio", "4:3", ASPECT_TEXT,
332 ASPECT_LONGTEXT, true )
334 add_float( CFG_PREFIX "fps", 0, FPS_TEXT, FPS_LONGTEXT, true )
337 add_bool( CFG_PREFIX "use-libv4l2", false, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
340 set_section( N_( "Tuner" ), NULL )
341 add_integer( CFG_PREFIX "tuner", 0, TUNER_TEXT, TUNER_LONGTEXT,
343 change_integer_range( 0, 0xFFFFFFFE )
345 add_integer( CFG_PREFIX "tuner-frequency", -1, FREQUENCY_TEXT,
346 FREQUENCY_LONGTEXT, true )
347 change_integer_range( -1, 0xFFFFFFFE )
349 add_integer( CFG_PREFIX "tuner-audio-mode", -1, TUNER_AUDIO_MODE_TEXT,
350 TUNER_AUDIO_MODE_LONGTEXT, true )
351 change_integer_list( i_tuner_audio_modes_list,
352 psz_tuner_audio_modes_list_text )
355 set_section( N_( "Controls" ),
356 N_( "Video capture controls (if supported by the device)" ) )
357 add_bool( CFG_PREFIX "controls-reset", false, CTRL_RESET_TEXT,
358 CTRL_RESET_LONGTEXT, true )
360 add_integer( CFG_PREFIX "brightness", -1, BRIGHTNESS_TEXT,
361 BRIGHTNESS_LONGTEXT, true )
362 add_integer( CFG_PREFIX "contrast", -1, CONTRAST_TEXT,
363 CONTRAST_LONGTEXT, true )
364 add_integer( CFG_PREFIX "saturation", -1, SATURATION_TEXT,
365 SATURATION_LONGTEXT, true )
366 add_integer( CFG_PREFIX "hue", -1, HUE_TEXT,
368 add_integer( CFG_PREFIX "auto-hue", -1,
369 HUE_AUTO_TEXT, HUE_AUTO_LONGTEXT, true )
370 change_integer_list( tristate_vlc, tristate_user )
371 add_obsolete_integer( CFG_PREFIX "black-level" ) /* since Linux 2.6.26 */
372 add_integer( CFG_PREFIX "white-balance-temperature", -1,
373 WHITE_BALANCE_TEMP_TEXT, WHITE_BALANCE_TEMP_LONGTEXT, true )
374 /* Ideally, the range should be 2800-6500 */
375 change_integer_range( -1, 6500 )
376 add_integer( CFG_PREFIX "auto-white-balance", -1,
377 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
378 change_integer_list( tristate_vlc, tristate_user )
379 add_obsolete_integer( CFG_PREFIX"do-white-balance" ) /* since 1.2.0 */
380 add_integer( CFG_PREFIX "red-balance", -1, REDBALANCE_TEXT,
381 REDBALANCE_LONGTEXT, true )
382 add_integer( CFG_PREFIX "blue-balance", -1, BLUEBALANCE_TEXT,
383 BLUEBALANCE_LONGTEXT, true )
384 add_integer( CFG_PREFIX "gamma", -1, GAMMA_TEXT,
385 GAMMA_LONGTEXT, true )
386 add_integer( CFG_PREFIX "exposure", -1, EXPOSURE_TEXT,
387 EXPOSURE_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_bool( CFG_PREFIX "hflip", false, HFLIP_TEXT, HFLIP_LONGTEXT, true )
405 add_bool( CFG_PREFIX "vflip", false, VFLIP_TEXT, VFLIP_LONGTEXT, true )
406 add_integer( CFG_PREFIX "rotate", -1, ROTATE_TEXT, ROTATE_LONGTEXT, true )
407 change_integer_range( -1, 359 )
408 add_obsolete_integer( CFG_PREFIX "hcenter" ) /* since Linux 2.6.26 */
409 add_obsolete_integer( CFG_PREFIX "vcenter" ) /* since Linux 2.6.26 */
410 add_integer( CFG_PREFIX"color-killer", -1,
411 COLOR_KILLER_TEXT, COLOR_KILLER_LONGTEXT, true )
412 change_integer_list( tristate_vlc, tristate_user )
413 add_integer( CFG_PREFIX"color-effect", -1,
414 COLOR_EFFECT_TEXT, COLOR_EFFECT_LONGTEXT, true )
415 change_integer_list( colorfx_vlc, colorfx_user )
417 add_integer( CFG_PREFIX "audio-volume", -1, AUDIO_VOLUME_TEXT,
418 AUDIO_VOLUME_LONGTEXT, true )
419 add_integer( CFG_PREFIX "audio-balance", -1, AUDIO_BALANCE_TEXT,
420 AUDIO_BALANCE_LONGTEXT, true )
421 add_bool( CFG_PREFIX "audio-mute", false, AUDIO_MUTE_TEXT,
422 AUDIO_MUTE_LONGTEXT, true )
423 add_integer( CFG_PREFIX "audio-bass", -1, AUDIO_BASS_TEXT,
424 AUDIO_BASS_LONGTEXT, true )
425 add_integer( CFG_PREFIX "audio-treble", -1, AUDIO_TREBLE_TEXT,
426 AUDIO_TREBLE_LONGTEXT, true )
427 add_bool( CFG_PREFIX "audio-loudness", false, AUDIO_LOUDNESS_TEXT,
428 AUDIO_LOUDNESS_LONGTEXT, true )
429 add_string( CFG_PREFIX "set-ctrls", NULL, S_CTRLS_TEXT,
430 S_CTRLS_LONGTEXT, true )
433 add_obsolete_string( CFG_PREFIX "adev" )
434 add_obsolete_integer( CFG_PREFIX "audio-method" )
435 add_obsolete_bool( CFG_PREFIX "stereo" )
436 add_obsolete_integer( CFG_PREFIX "samplerate" )
438 add_shortcut( "v4l2" )
439 set_capability( "access_demux", 0 )
440 set_callbacks( DemuxOpen, DemuxClose )
443 add_shortcut( "v4l2", "v4l2c" )
444 set_description( N_("Video4Linux2 Compressed A/V") )
445 set_capability( "access", 0 )
446 /* use these when open as access_demux fails; VLC will use another demux */
447 set_callbacks( AccessOpen, AccessClose )
451 /*****************************************************************************
452 * Access: local prototypes
453 *****************************************************************************/
455 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
460 vlc_fourcc_t i_fourcc;
464 } v4l2chroma_to_fourcc[] =
467 { V4L2_PIX_FMT_GREY, VLC_CODEC_GREY, 0, 0, 0 },
468 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
469 { V4L2_PIX_FMT_RGB555, VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
470 { V4L2_PIX_FMT_RGB565, VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
471 /* Won't work since we don't know how to handle such gmask values
473 { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
474 { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
476 { V4L2_PIX_FMT_BGR24, VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
477 { V4L2_PIX_FMT_RGB24, VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
478 { V4L2_PIX_FMT_BGR32, VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
479 { V4L2_PIX_FMT_RGB32, VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
480 { V4L2_PIX_FMT_YUYV, VLC_CODEC_YUYV, 0, 0, 0 },
481 { V4L2_PIX_FMT_UYVY, VLC_CODEC_UYVY, 0, 0, 0 },
482 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
483 { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
484 { V4L2_PIX_FMT_YVU420, VLC_CODEC_YV12, 0, 0, 0 },
485 { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
486 { V4L2_PIX_FMT_YUV410, VLC_CODEC_I410, 0, 0, 0 },
488 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
490 { V4L2_PIX_FMT_YUV420, VLC_CODEC_I420, 0, 0, 0 },
491 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_CODEC_RGB32 }, */
493 /* Compressed data types */
494 { V4L2_PIX_FMT_MJPEG, VLC_CODEC_MJPG, 0, 0, 0 },
495 { V4L2_PIX_FMT_JPEG, VLC_CODEC_JPEG, 0, 0, 0 },
497 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
498 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
504 * List of V4L2 chromas were confident enough to use as fallbacks if the
505 * user hasn't provided a --v4l2-chroma value.
507 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
509 static const uint32_t p_chroma_fallbacks[] =
510 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
511 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
512 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
515 * Parses a V4L2 MRL into VLC object variables.
517 void ParseMRL( vlc_object_t *obj, const char *mrl )
519 const char *p = strchr( mrl, ':' );
524 var_LocationParse( obj, p + 1, CFG_PREFIX );
526 dev = strndup( mrl, p - mrl );
536 var_Create( obj, CFG_PREFIX"dev", VLC_VAR_STRING );
537 var_SetString( obj, CFG_PREFIX"dev", dev );
542 /*****************************************************************************
543 * GrabVideo: Grab a video frame
544 *****************************************************************************/
545 block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
548 struct v4l2_buffer buf;
550 /* Grab Video Frame */
554 memset( &buf, 0, sizeof(buf) );
555 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
556 buf.memory = V4L2_MEMORY_MMAP;
558 /* Wait for next frame */
559 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
566 /* Could ignore EIO, see spec. */
569 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
574 if( buf.index >= p_sys->i_nbuffers ) {
575 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
579 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
584 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
586 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
587 block_Release( p_block );
593 case IO_METHOD_USERPTR:
594 memset( &buf, 0, sizeof(buf) );
595 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
596 buf.memory = V4L2_MEMORY_USERPTR;
598 /* Wait for next frame */
599 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
606 /* Could ignore EIO, see spec. */
609 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
616 for( i = 0; i < p_sys->i_nbuffers; i++ )
618 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
619 buf.length == p_sys->p_buffers[i].length ) break;
622 if( i >= p_sys->i_nbuffers )
624 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
628 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
633 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
635 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
636 block_Release( p_block );
646 /*****************************************************************************
647 * ProcessVideoFrame: Helper function to take a buffer and copy it into
649 *****************************************************************************/
650 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
654 if( !p_frame ) return NULL;
657 if( !( p_block = block_New( p_demux, i_size ) ) )
659 msg_Warn( p_demux, "Cannot get new block" );
664 memcpy( p_block->p_buffer, p_frame, i_size );
669 /*****************************************************************************
670 * Helper function to initalise video IO using the mmap method
671 *****************************************************************************/
672 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
674 struct v4l2_requestbuffers req;
676 memset( &req, 0, sizeof(req) );
678 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
679 req.memory = V4L2_MEMORY_MMAP;
681 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
683 msg_Err( p_demux, "device does not support mmap I/O" );
689 msg_Err( p_demux, "insufficient buffers" );
693 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
694 if( unlikely(!p_sys->p_buffers) )
697 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
699 struct v4l2_buffer buf;
701 memset( &buf, 0, sizeof(buf) );
702 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
703 buf.memory = V4L2_MEMORY_MMAP;
704 buf.index = p_sys->i_nbuffers;
706 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
708 msg_Err( p_demux, "VIDIOC_QUERYBUF: %m" );
712 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
713 p_sys->p_buffers[p_sys->i_nbuffers].start =
714 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
716 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
718 msg_Err( p_demux, "mmap failed: %m" );
726 /*****************************************************************************
727 * Helper function to initalise video IO using the userbuf method
728 *****************************************************************************/
729 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
731 struct v4l2_requestbuffers req;
732 unsigned int i_page_size;
734 i_page_size = sysconf(_SC_PAGESIZE);
735 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
737 memset( &req, 0, sizeof(req) );
739 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
740 req.memory = V4L2_MEMORY_USERPTR;
742 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
744 msg_Err( p_demux, "device does not support user pointer i/o" );
748 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
749 if( !p_sys->p_buffers )
752 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
754 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
755 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
756 /* boundary */ i_page_size, i_buffer_size ) )
764 * \return true if the specified V4L2 pixel format is
765 * in the array of supported formats returned by the driver
767 static bool IsPixelFormatSupported( struct v4l2_fmtdesc *codecs, size_t n,
768 unsigned int i_pixelformat )
770 for( size_t i = 0; i < n; i++ )
771 if( codecs[i].pixelformat == i_pixelformat )
777 static int InitVideo( vlc_object_t *p_obj, int i_fd, demux_sys_t *p_sys,
781 * Opens and sets up a video device
782 * \return file descriptor or -1 on error
784 int OpenVideo( vlc_object_t *obj, demux_sys_t *sys, bool b_demux )
786 char *path = var_InheritString( obj, CFG_PREFIX"dev" );
787 if( unlikely(path == NULL) )
788 return -1; /* probably OOM */
790 msg_Dbg( obj, "opening device '%s'", path );
792 int fd = vlc_open( path, O_RDWR );
795 msg_Err( obj, "cannot open device '%s': %m", path );
801 if( !var_InheritBool( obj, CFG_PREFIX "use-libv4l2" ) )
803 msg_Dbg( obj, "trying kernel V4L2" );
804 if( InitVideo( obj, fd, sys, b_demux ) == 0 )
807 msg_Dbg( obj, "trying library V4L2" );
808 /* Note the v4l2_xxx functions are designed so that if they get passed an
809 unknown fd, the will behave exactly as their regular xxx counterparts,
810 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
811 custom cam format to normal formats conversion). Chances are big we will
812 still fail then though, as normally v4l2_fd_open only fails if the
813 device is not a v4l2 device. */
814 int libfd = v4l2_fd_open( fd, 0 );
819 if( InitVideo( obj, fd, sys, b_demux ) )
828 static int InitVideo( vlc_object_t *p_obj, int i_fd, demux_sys_t *p_sys,
831 struct v4l2_cropcap cropcap;
832 struct v4l2_crop crop;
833 struct v4l2_format fmt;
835 enum v4l2_buf_type buf_type;
838 /* Get device capabilites */
839 struct v4l2_capability cap;
840 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &cap ) < 0 )
842 msg_Err( p_obj, "cannot get video capabilities: %m" );
846 msg_Dbg( p_obj, "device %s using driver %s (version %u.%u.%u) on %s",
847 cap.card, cap.driver, (cap.version >> 16) & 0xFF,
848 (cap.version >> 8) & 0xFF, cap.version & 0xFF, cap.bus_info );
849 msg_Dbg( p_obj, "the device has the capabilities: 0x%08X",
851 msg_Dbg( p_obj, " (%c) Video Capture, (%c) Audio, (%c) Tuner, (%c) Radio",
852 ( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
853 ( cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
854 ( cap.capabilities & V4L2_CAP_TUNER ? 'X':' '),
855 ( cap.capabilities & V4L2_CAP_RADIO ? 'X':' ') );
856 msg_Dbg( p_obj, " (%c) Read/Write, (%c) Streaming, (%c) Asynchronous",
857 ( cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
858 ( cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
859 ( cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
861 if( cap.capabilities & V4L2_CAP_STREAMING )
862 p_sys->io = IO_METHOD_MMAP;
863 else if( cap.capabilities & V4L2_CAP_READWRITE )
864 p_sys->io = IO_METHOD_READ;
867 msg_Err( p_obj, "no supported I/O method" );
871 /* Now, enumerate all the video inputs. This is useless at the moment
872 since we have no way to present that info to the user except with
874 if( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
876 struct v4l2_input input;
877 unsigned index = var_InheritInteger( p_obj, CFG_PREFIX"input" );
880 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &input ) >= 0 )
882 msg_Dbg( p_obj, "video input %u (%s) has type: %s %c",
883 input.index, input.name,
884 input.type == V4L2_INPUT_TYPE_TUNER
885 ? "Tuner adapter" : "External analog input",
886 input.index == index ? '*' : ' ' );
891 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &index ) < 0 )
893 msg_Err( p_obj, "cannot set input %u: %m", index );
896 msg_Dbg( p_obj, "input set to %u", index );
899 /* Select standard */
901 const char *stdname = var_InheritString( p_obj, CFG_PREFIX"standard" );
902 if( stdname != NULL )
904 v4l2_std_id std = strtoull( stdname, NULL, 0 );
907 const size_t n = sizeof(standards_vlc) / sizeof(*standards_vlc);
908 assert( n == sizeof(standards_v4l2) / sizeof(*standards_v4l2) );
909 assert( n == sizeof(standards_user) / sizeof(*standards_user) );
910 for( size_t i = 0; i < n; i++ )
911 if( strcasecmp( stdname, standards_vlc[i] ) == 0 )
913 std = standards_v4l2[i];
918 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &std ) < 0
919 || v4l2_ioctl( i_fd, VIDIOC_G_STD, &std ) < 0 )
921 msg_Err( p_obj, "cannot set standard 0x%"PRIx64": %m", std );
924 msg_Dbg( p_obj, "standard set to 0x%"PRIx64":", std );
925 bottom_first = std == V4L2_STD_NTSC;
928 bottom_first = false;
930 /* Set audio input */
931 if( cap.capabilities & V4L2_CAP_AUDIO )
933 struct v4l2_audio audio = { .index = 0 };
934 uint32_t idx = var_InheritInteger( p_obj, CFG_PREFIX"audio-input" );
936 /* Probe audio inputs */
937 while( v4l2_ioctl( i_fd, VIDIOC_ENUMAUDIO, &audio ) >= 0 )
939 msg_Dbg( p_obj, "audio input %u (%s) is %s%s %c", audio.index,
941 audio.capability & V4L2_AUDCAP_STEREO ? "Stereo" : "Mono",
942 audio.capability & V4L2_AUDCAP_AVL
943 ? " (Automatic Volume Level supported)" : "",
944 audio.index == idx );
948 if( idx != (uint32_t)-1 )
950 memset( &audio, 0, sizeof(audio) );
952 /* TODO: AVL support (audio.mode) */
954 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &audio ) < 0 )
956 msg_Err( p_obj, "cannot set audio input %"PRIu32": %m", idx );
959 msg_Dbg( p_obj, "audio input set to %"PRIu32, idx );
963 /* List tuner caps */
964 if( cap.capabilities & V4L2_CAP_TUNER )
966 struct v4l2_tuner tuner;
967 uint32_t idx = var_CreateGetInteger( p_obj, CFG_PREFIX"tuner" );
968 enum v4l2_tuner_type type = V4L2_TUNER_RADIO;
971 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
973 if( tuner.index == idx )
977 (tuner.capability & V4L2_TUNER_CAP_LOW) ? "Hz" : "kHz";
978 msg_Dbg( p_obj, "tuner %u (%s) has type: %s, "
979 "frequency range: %.1f %s -> %.1f %s", tuner.index,
981 tuner.type == V4L2_TUNER_RADIO ? "Radio" : "Analog TV",
982 tuner.rangelow * 62.5, unit,
983 tuner.rangehigh * 62.5, unit );
985 struct v4l2_frequency frequency = { .tuner = tuner.index };
986 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
988 msg_Err( p_obj, "cannot get tuner frequency: %m" );
991 msg_Dbg( p_obj, "tuner %u (%s) frequency: %.1f %s", tuner.index,
992 tuner.name, frequency.frequency * 62.5, unit );
997 uint32_t freq = var_InheritInteger( p_obj,
998 CFG_PREFIX"tuner-frequency" );
999 if( freq != (uint32_t)-1 )
1001 struct v4l2_frequency frequency = {
1004 .frequency = freq / 62.5,
1007 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1009 msg_Err( p_obj, "cannot set tuner frequency: %m" );
1012 msg_Dbg( p_obj, "tuner frequency set" );
1015 /* Set the tuner audio mode */
1016 int32_t audmode = var_InheritInteger( p_obj,
1017 CFG_PREFIX"tuner-audio-mode" );
1020 struct v4l2_tuner tuner = {
1025 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1027 msg_Err( p_obj, "cannot set tuner audio mode: %m" );
1030 msg_Dbg( p_obj, "tuner audio mode set" );
1034 /* Probe for available chromas */
1035 struct v4l2_fmtdesc *codecs = NULL;
1036 uint_fast32_t ncodec = 0;
1037 if( cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
1039 struct v4l2_fmtdesc codec = {
1041 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1044 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
1045 codec.index = ++ncodec;
1047 codecs = malloc( ncodec * sizeof( *codecs ) );
1048 if( unlikely(codecs == NULL) )
1051 for( uint_fast32_t i = 0; i < ncodec; i++ )
1053 codecs[i].index = i;
1054 codecs[i].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1056 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codecs[i] ) < 0 )
1058 msg_Err( p_obj, "cannot get codec description: %m" );
1062 /* only print if vlc supports the format */
1063 char fourcc_v4l2[5];
1064 memset( fourcc_v4l2, 0, sizeof( fourcc_v4l2 ) );
1065 vlc_fourcc_to_char( codecs[i].pixelformat, fourcc_v4l2 );
1067 bool b_codec_supported = false;
1068 for( unsigned j = 0; v4l2chroma_to_fourcc[j].i_v4l2 != 0; j++ )
1070 if( v4l2chroma_to_fourcc[j].i_v4l2 == codecs[i].pixelformat )
1073 memset( fourcc, 0, sizeof( fourcc ) );
1074 vlc_fourcc_to_char( v4l2chroma_to_fourcc[j].i_fourcc,
1076 msg_Dbg( p_obj, "device supports chroma %4.4s [%s, %s]",
1077 fourcc, codecs[i].description, fourcc_v4l2 );
1078 b_codec_supported = true;
1081 if( !b_codec_supported )
1083 msg_Dbg( p_obj, "device codec %4.4s (%s) not supported",
1084 fourcc_v4l2, codecs[i].description );
1089 /* TODO: Move the resolution stuff up here */
1090 /* if MPEG encoder card, no need to do anything else after this */
1091 p_sys->controls = ControlsInit( p_obj, i_fd );
1093 /* Reset Cropping */
1094 memset( &cropcap, 0, sizeof(cropcap) );
1095 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1096 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1098 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1099 crop.c = cropcap.defrect; /* reset to default */
1100 if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
1102 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1107 /* Cropping not supported. */
1110 /* Errors ignored. */
1117 /* Try and find default resolution if not specified */
1118 int width = var_InheritInteger( p_obj, CFG_PREFIX"width" );
1119 int height = var_InheritInteger( p_obj, CFG_PREFIX"height" );
1121 memset( &fmt, 0, sizeof(fmt) );
1122 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1124 if( width <= 0 || height <= 0 )
1126 /* Use current width and height settings */
1127 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
1129 msg_Err( p_obj, "cannot get default width and height: %m" );
1133 msg_Dbg( p_obj, "found default width and height of %ux%u",
1134 fmt.fmt.pix.width, fmt.fmt.pix.height );
1136 if( width < 0 || height < 0 )
1138 msg_Dbg( p_obj, "will try to find optimal width and height" );
1143 /* Use user specified width and height */
1144 msg_Dbg( p_obj, "trying specified size %dx%d", width, height );
1145 fmt.fmt.pix.width = width;
1146 fmt.fmt.pix.height = height;
1149 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1154 char *reqchroma = var_InheritString( p_obj, CFG_PREFIX"chroma" );
1156 /* Test and set Chroma */
1157 fmt.fmt.pix.pixelformat = 0;
1158 if( reqchroma != NULL )
1160 /* User specified chroma */
1161 const vlc_fourcc_t i_requested_fourcc =
1162 vlc_fourcc_GetCodecFromString( VIDEO_ES, reqchroma );
1164 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
1166 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
1168 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
1172 /* Try and set user chroma */
1173 bool b_error = !IsPixelFormatSupported( codecs, ncodec,
1174 fmt.fmt.pix.pixelformat );
1175 if( !b_error && fmt.fmt.pix.pixelformat )
1177 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1179 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1180 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1182 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1189 msg_Warn( p_obj, "requested chroma %s not supported. "
1190 " Trying default.", reqchroma );
1191 fmt.fmt.pix.pixelformat = 0;
1196 /* If no user specified chroma, find best */
1197 /* This also decides if MPEG encoder card or not */
1198 if( !fmt.fmt.pix.pixelformat )
1201 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
1203 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
1204 if( IsPixelFormatSupported( codecs, ncodec,
1205 fmt.fmt.pix.pixelformat ) )
1207 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1209 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1210 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1212 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1215 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
1217 msg_Warn( p_obj, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
1222 if( width < 0 || height < 0 )
1224 f_fps = var_InheritFloat( p_obj, CFG_PREFIX"fps" );
1227 f_fps = GetAbsoluteMaxFrameRate( p_obj, i_fd,
1228 fmt.fmt.pix.pixelformat );
1229 msg_Dbg( p_obj, "Found maximum framerate of %f", f_fps );
1231 uint32_t i_width, i_height;
1232 GetMaxDimensions( p_obj, i_fd,
1233 fmt.fmt.pix.pixelformat, f_fps,
1234 &i_width, &i_height );
1235 if( i_width || i_height )
1237 msg_Dbg( p_obj, "Found optimal dimensions for framerate %f "
1238 "of %ux%u", f_fps, i_width, i_height );
1239 fmt.fmt.pix.width = i_width;
1240 fmt.fmt.pix.height = i_height;
1241 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1243 msg_Err( p_obj, "Cannot set size to optimal dimensions "
1244 "%ux%u", i_width, i_height );
1250 msg_Warn( p_obj, "Could not find optimal width and height, "
1251 "falling back to driver default." );
1256 width = fmt.fmt.pix.width;
1257 height = fmt.fmt.pix.height;
1259 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
1260 /* Print extra info */
1261 msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
1262 /* Check interlacing */
1263 switch( fmt.fmt.pix.field )
1265 case V4L2_FIELD_NONE:
1266 msg_Dbg( p_obj, "Interlacing setting: progressive" );
1268 case V4L2_FIELD_TOP:
1269 msg_Dbg( p_obj, "Interlacing setting: top field only" );
1271 case V4L2_FIELD_BOTTOM:
1272 msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
1274 case V4L2_FIELD_INTERLACED:
1275 msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
1277 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
1279 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
1281 case V4L2_FIELD_SEQ_TB:
1282 msg_Dbg( p_obj, "Interlacing setting: sequential top bottom (TODO)" );
1284 case V4L2_FIELD_SEQ_BT:
1285 msg_Dbg( p_obj, "Interlacing setting: sequential bottom top (TODO)" );
1287 case V4L2_FIELD_ALTERNATE:
1288 msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
1291 case V4L2_FIELD_INTERLACED_TB:
1292 msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
1293 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
1295 case V4L2_FIELD_INTERLACED_BT:
1296 msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
1297 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
1300 msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
1301 fmt.fmt.pix.field );
1305 /* Look up final fourcc */
1306 p_sys->i_fourcc = 0;
1307 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
1309 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
1311 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
1312 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
1313 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
1314 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
1315 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
1320 /* Buggy driver paranoia */
1321 i_min = fmt.fmt.pix.width * 2;
1322 if( fmt.fmt.pix.bytesperline < i_min )
1323 fmt.fmt.pix.bytesperline = i_min;
1324 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
1325 if( fmt.fmt.pix.sizeimage < i_min )
1326 fmt.fmt.pix.sizeimage = i_min;
1328 /* Init I/O method */
1331 case IO_METHOD_READ:
1332 p_sys->blocksize = fmt.fmt.pix.sizeimage;
1335 case IO_METHOD_MMAP:
1336 if( InitMmap( p_obj, p_sys, i_fd ) )
1338 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
1340 struct v4l2_buffer buf;
1342 memset( &buf, 0, sizeof(buf) );
1343 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1344 buf.memory = V4L2_MEMORY_MMAP;
1347 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
1349 msg_Err( p_obj, "VIDIOC_QBUF failed" );
1354 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1355 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
1357 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
1362 case IO_METHOD_USERPTR:
1363 if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) )
1365 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
1367 struct v4l2_buffer buf;
1369 memset( &buf, 0, sizeof(buf) );
1370 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1371 buf.memory = V4L2_MEMORY_USERPTR;
1373 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
1374 buf.length = p_sys->p_buffers[i].length;
1376 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
1378 msg_Err( p_obj, "VIDIOC_QBUF failed" );
1383 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1384 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
1386 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
1396 int ar = 4 * VOUT_ASPECT_FACTOR / 3;
1397 char *str = var_InheritString( p_obj, CFG_PREFIX"aspect-ratio" );
1398 if( likely(str != NULL) )
1400 const char *delim = strchr( str, ':' );
1402 ar = atoi( str ) * VOUT_ASPECT_FACTOR / atoi( delim + 1 );
1407 es_fmt.video.i_width = width;
1408 es_fmt.video.i_height = height;
1410 /* Get aspect-ratio */
1411 es_fmt.video.i_sar_num = ar * es_fmt.video.i_height;
1412 es_fmt.video.i_sar_den = VOUT_ASPECT_FACTOR * es_fmt.video.i_width;
1415 es_fmt.video.i_frame_rate = lround(f_fps * 1000000.);
1416 es_fmt.video.i_frame_rate_base = 1000000;
1418 demux_t *p_demux = (demux_t *) p_obj;
1419 msg_Dbg( p_obj, "added new video es %4.4s %dx%d",
1420 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
1421 msg_Dbg( p_obj, " frame rate: %f", f_fps );
1423 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );