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 *****************************************************************************/
40 #include <vlc_common.h>
41 #include <vlc_plugin.h>
42 #include <vlc_access.h>
43 #include <vlc_demux.h>
44 #include <vlc_input.h>
48 #include <sys/ioctl.h>
51 #include <linux/videodev2.h>
59 /*****************************************************************************
61 *****************************************************************************/
63 static int DemuxOpen ( vlc_object_t * );
64 static void DemuxClose( vlc_object_t * );
65 static int AccessOpen ( vlc_object_t * );
66 static void AccessClose( vlc_object_t * );
68 #define STANDARD_TEXT N_( "Standard" )
69 #define STANDARD_LONGTEXT N_( \
70 "Video standard (Default, SECAM, PAL, or NTSC)." )
71 #define CHROMA_TEXT N_("Video input chroma format")
72 #define CHROMA_LONGTEXT N_( \
73 "Force the Video4Linux2 video device to use a specific chroma format " \
74 "(eg. I420 or I422 for raw images, MJPG for M-JPEG compressed input) " \
75 "(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
76 "I41N, I422, I420, I411, I410, MJPG)")
77 #define INPUT_TEXT N_( "Input" )
78 #define INPUT_LONGTEXT N_( \
79 "Input of the card to use (see debug)." )
80 #define AUDIO_INPUT_TEXT N_( "Audio input" )
81 #define AUDIO_INPUT_LONGTEXT N_( \
82 "Audio input of the card to use (see debug)." )
83 #define IOMETHOD_TEXT N_( "IO Method" )
84 #define IOMETHOD_LONGTEXT N_( \
85 "IO Method (READ, MMAP, USERPTR)." )
86 #define WIDTH_TEXT N_( "Width" )
87 #define WIDTH_LONGTEXT N_( \
88 "Force width (-1 for autodetect, 0 for driver default)." )
89 #define HEIGHT_TEXT N_( "Height" )
90 #define HEIGHT_LONGTEXT N_( \
91 "Force height (-1 for autodetect, 0 for driver default)." )
92 #define FPS_TEXT N_( "Framerate" )
93 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
94 "(0 for autodetect)." )
97 #define LIBV4L2_TEXT N_( "Use libv4l2" )
98 #define LIBV4L2_LONGTEXT N_( \
99 "Force usage of the libv4l2 wrapper." )
102 #define CTRL_RESET_TEXT N_( "Reset v4l2 controls" )
103 #define CTRL_RESET_LONGTEXT N_( \
104 "Reset controls to defaults provided by the v4l2 driver." )
105 #define BRIGHTNESS_TEXT N_( "Brightness" )
106 #define BRIGHTNESS_LONGTEXT N_( \
107 "Brightness of the video input (if supported by the v4l2 driver)." )
108 #define CONTRAST_TEXT N_( "Contrast" )
109 #define CONTRAST_LONGTEXT N_( \
110 "Contrast of the video input (if supported by the v4l2 driver)." )
111 #define SATURATION_TEXT N_( "Saturation" )
112 #define SATURATION_LONGTEXT N_( \
113 "Saturation of the video input (if supported by the v4l2 driver)." )
114 #define HUE_TEXT N_( "Hue" )
115 #define HUE_LONGTEXT N_( \
116 "Hue of the video input (if supported by the v4l2 driver)." )
117 #define BLACKLEVEL_TEXT N_( "Black level" )
118 #define BLACKLEVEL_LONGTEXT N_( \
119 "Black level of the video input (if supported by the v4l2 driver)." )
120 #define AUTOWHITEBALANCE_TEXT N_( "Auto white balance" )
121 #define AUTOWHITEBALANCE_LONGTEXT N_( \
122 "Automatically set the white balance of the video input " \
123 "(if supported by the v4l2 driver)." )
124 #define DOWHITEBALANCE_TEXT N_( "Do white balance" )
125 #define DOWHITEBALANCE_LONGTEXT N_( \
126 "Trigger a white balancing action, useless if auto white balance is " \
127 "activated (if supported by the v4l2 driver)." )
128 #define REDBALANCE_TEXT N_( "Red balance" )
129 #define REDBALANCE_LONGTEXT N_( \
130 "Red balance of the video input (if supported by the v4l2 driver)." )
131 #define BLUEBALANCE_TEXT N_( "Blue balance" )
132 #define BLUEBALANCE_LONGTEXT N_( \
133 "Blue balance of the video input (if supported by the v4l2 driver)." )
134 #define GAMMA_TEXT N_( "Gamma" )
135 #define GAMMA_LONGTEXT N_( \
136 "Gamma of the video input (if supported by the v4l2 driver)." )
137 #define EXPOSURE_TEXT N_( "Exposure" )
138 #define EXPOSURE_LONGTEXT N_( \
139 "Exposure of the video input (if supported by the v4L2 driver)." )
140 #define AUTOGAIN_TEXT N_( "Auto gain" )
141 #define AUTOGAIN_LONGTEXT N_( \
142 "Automatically set the video input's gain (if supported by the " \
144 #define GAIN_TEXT N_( "Gain" )
145 #define GAIN_LONGTEXT N_( \
146 "Video input's gain (if supported by the v4l2 driver)." )
147 #define HFLIP_TEXT N_( "Horizontal flip" )
148 #define HFLIP_LONGTEXT N_( \
149 "Flip the video horizontally (if supported by the v4l2 driver)." )
150 #define VFLIP_TEXT N_( "Vertical flip" )
151 #define VFLIP_LONGTEXT N_( \
152 "Flip the video vertically (if supported by the v4l2 driver)." )
153 #define HCENTER_TEXT N_( "Horizontal centering" )
154 #define HCENTER_LONGTEXT N_( \
155 "Set the camera's horizontal centering (if supported by the v4l2 driver)." )
156 #define VCENTER_TEXT N_( "Vertical centering" )
157 #define VCENTER_LONGTEXT N_( \
158 "Set the camera's vertical centering (if supported by the v4l2 driver)." )
160 #define AUDIO_VOLUME_TEXT N_( "Volume" )
161 #define AUDIO_VOLUME_LONGTEXT N_( \
162 "Volume of the audio input (if supported by the v4l2 driver)." )
163 #define AUDIO_BALANCE_TEXT N_( "Balance" )
164 #define AUDIO_BALANCE_LONGTEXT N_( \
165 "Balance of the audio input (if supported by the v4l2 driver)." )
166 #define AUDIO_MUTE_TEXT N_( "Mute" )
167 #define AUDIO_MUTE_LONGTEXT N_( \
168 "Mute audio input (if supported by the v4l2 driver)." )
169 #define AUDIO_BASS_TEXT N_( "Bass" )
170 #define AUDIO_BASS_LONGTEXT N_( \
171 "Bass level of the audio input (if supported by the v4l2 driver)." )
172 #define AUDIO_TREBLE_TEXT N_( "Treble" )
173 #define AUDIO_TREBLE_LONGTEXT N_( \
174 "Treble level of the audio input (if supported by the v4l2 driver)." )
175 #define AUDIO_LOUDNESS_TEXT N_( "Loudness" )
176 #define AUDIO_LOUDNESS_LONGTEXT N_( \
177 "Loudness of the audio input (if supported by the v4l2 driver)." )
179 #define CACHING_TEXT N_("Caching value in ms")
180 #define CACHING_LONGTEXT N_( \
181 "Caching value for V4L2 captures. This " \
182 "value should be set in milliseconds." )
183 #define S_CTRLS_TEXT N_("v4l2 driver controls")
184 #define S_CTRLS_LONGTEXT N_( \
185 "Set the v4l2 driver controls to the values specified using a comma " \
186 "separated list optionally encapsulated by curly braces " \
187 "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
188 "To list available controls, increase verbosity (-vvv) " \
189 "or use the v4l2-ctl application." )
191 #define TUNER_TEXT N_("Tuner id")
192 #define TUNER_LONGTEXT N_( \
193 "Tuner id (see debug output)." )
194 #define FREQUENCY_TEXT N_("Frequency")
195 #define FREQUENCY_LONGTEXT N_( \
196 "Tuner frequency in Hz or kHz (see debug output)" )
197 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
198 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
199 "Tuner audio mono/stereo and track selection." )
201 #define AUDIO_DEPRECATED_ERROR N_( \
202 "Alsa or OSS audio capture in the v4l2 access is deprecated. " \
203 "please use 'v4l2:/""/ :input-slave=alsa:/""/' or " \
204 "'v4l2:/""/ :input-slave=oss:/""/' instead." )
212 static const int i_standards_list[] =
213 { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC };
214 static const char *const psz_standards_list_text[] =
215 { N_("Default"), N_("SECAM"), N_("PAL"), N_("NTSC") };
217 static const int i_iomethod_list[] =
218 { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
219 static const char *const psz_iomethod_list_text[] =
220 { N_("READ"), N_("MMAP"), N_("USERPTR") };
222 static const int i_tuner_audio_modes_list[] =
223 { V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
224 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
225 V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
226 static const char *const psz_tuner_audio_modes_list_text[] =
229 N_( "Primary language (Analog TV tuners only)" ),
230 N_( "Secondary language (Analog TV tuners only)" ),
231 N_( "Second audio program (Analog TV tuners only)" ),
232 N_( "Primary language left, Secondary language right" ) };
234 #define V4L2_DEFAULT "/dev/video0"
235 #define CFG_PREFIX "v4l2-"
238 set_shortname( N_("Video4Linux2") )
239 set_description( N_("Video4Linux2 input") )
240 set_category( CAT_INPUT )
241 set_subcategory( SUBCAT_INPUT_ACCESS )
243 set_section( N_( "Video input" ), NULL )
244 add_integer( CFG_PREFIX "standard", 0, NULL, STANDARD_TEXT,
245 STANDARD_LONGTEXT, false )
246 change_integer_list( i_standards_list, psz_standards_list_text, NULL )
247 add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
249 add_integer( CFG_PREFIX "input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
251 add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
252 AUDIO_INPUT_LONGTEXT, true )
253 add_integer( CFG_PREFIX "io", IO_METHOD_MMAP, NULL, IOMETHOD_TEXT,
254 IOMETHOD_LONGTEXT, true )
255 change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL )
256 add_integer( CFG_PREFIX "width", -1, NULL, WIDTH_TEXT,
257 WIDTH_LONGTEXT, true )
258 add_integer( CFG_PREFIX "height", -1, NULL, HEIGHT_TEXT,
259 HEIGHT_LONGTEXT, true )
260 add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
261 add_integer( CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL,
262 CACHING_TEXT, CACHING_LONGTEXT, true )
264 add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
267 set_section( N_( "Tuner" ), NULL )
268 add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
270 add_integer( CFG_PREFIX "tuner-frequency", -1, NULL, FREQUENCY_TEXT,
271 FREQUENCY_LONGTEXT, true )
272 add_integer( CFG_PREFIX "tuner-audio-mode", -1, NULL, TUNER_AUDIO_MODE_TEXT,
273 TUNER_AUDIO_MODE_LONGTEXT, true )
274 change_integer_list( i_tuner_audio_modes_list,
275 psz_tuner_audio_modes_list_text, 0 )
277 set_section( N_( "Controls" ),
278 N_( "v4l2 driver controls, if supported by your v4l2 driver." ) )
279 add_bool( CFG_PREFIX "controls-reset", false, NULL, CTRL_RESET_TEXT,
280 CTRL_RESET_LONGTEXT, true )
281 add_integer( CFG_PREFIX "brightness", -1, NULL, BRIGHTNESS_TEXT,
282 BRIGHTNESS_LONGTEXT, true )
283 add_integer( CFG_PREFIX "contrast", -1, NULL, CONTRAST_TEXT,
284 CONTRAST_LONGTEXT, true )
285 add_integer( CFG_PREFIX "saturation", -1, NULL, SATURATION_TEXT,
286 SATURATION_LONGTEXT, true )
287 add_integer( CFG_PREFIX "hue", -1, NULL, HUE_TEXT,
289 add_integer( CFG_PREFIX "black-level", -1, NULL, BLACKLEVEL_TEXT,
290 BLACKLEVEL_LONGTEXT, true )
291 add_integer( CFG_PREFIX "auto-white-balance", -1, NULL,
292 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
293 add_integer( CFG_PREFIX "do-white-balance", -1, NULL, DOWHITEBALANCE_TEXT,
294 DOWHITEBALANCE_LONGTEXT, true )
295 add_integer( CFG_PREFIX "red-balance", -1, NULL, REDBALANCE_TEXT,
296 REDBALANCE_LONGTEXT, true )
297 add_integer( CFG_PREFIX "blue-balance", -1, NULL, BLUEBALANCE_TEXT,
298 BLUEBALANCE_LONGTEXT, true )
299 add_integer( CFG_PREFIX "gamma", -1, NULL, GAMMA_TEXT,
300 GAMMA_LONGTEXT, true )
301 add_integer( CFG_PREFIX "exposure", -1, NULL, EXPOSURE_TEXT,
302 EXPOSURE_LONGTEXT, true )
303 add_integer( CFG_PREFIX "autogain", -1, NULL, AUTOGAIN_TEXT,
304 AUTOGAIN_LONGTEXT, true )
305 add_integer( CFG_PREFIX "gain", -1, NULL, GAIN_TEXT,
306 GAIN_LONGTEXT, true )
307 add_integer( CFG_PREFIX "hflip", -1, NULL, HFLIP_TEXT,
308 HFLIP_LONGTEXT, true )
309 add_integer( CFG_PREFIX "vflip", -1, NULL, VFLIP_TEXT,
310 VFLIP_LONGTEXT, true )
311 add_integer( CFG_PREFIX "hcenter", -1, NULL, HCENTER_TEXT,
312 HCENTER_LONGTEXT, true )
313 add_integer( CFG_PREFIX "vcenter", -1, NULL, VCENTER_TEXT,
314 VCENTER_LONGTEXT, true )
315 add_integer( CFG_PREFIX "audio-volume", -1, NULL, AUDIO_VOLUME_TEXT,
316 AUDIO_VOLUME_LONGTEXT, true )
317 add_integer( CFG_PREFIX "audio-balance", -1, NULL, AUDIO_BALANCE_TEXT,
318 AUDIO_BALANCE_LONGTEXT, true )
319 add_bool( CFG_PREFIX "audio-mute", false, NULL, AUDIO_MUTE_TEXT,
320 AUDIO_MUTE_LONGTEXT, true )
321 add_integer( CFG_PREFIX "audio-bass", -1, NULL, AUDIO_BASS_TEXT,
322 AUDIO_BASS_LONGTEXT, true )
323 add_integer( CFG_PREFIX "audio-treble", -1, NULL, AUDIO_TREBLE_TEXT,
324 AUDIO_TREBLE_LONGTEXT, true )
325 add_integer( CFG_PREFIX "audio-loudness", -1, NULL, AUDIO_LOUDNESS_TEXT,
326 AUDIO_LOUDNESS_LONGTEXT, true )
327 add_string( CFG_PREFIX "set-ctrls", NULL, NULL, S_CTRLS_TEXT,
328 S_CTRLS_LONGTEXT, true )
330 add_obsolete_string( CFG_PREFIX "dev" )
332 add_obsolete_string( CFG_PREFIX "adev" )
333 add_obsolete_integer( CFG_PREFIX "audio-method" )
334 add_obsolete_bool( CFG_PREFIX "stereo" )
335 add_obsolete_integer( CFG_PREFIX "samplerate" )
337 add_shortcut( "v4l2" )
338 set_capability( "access_demux", 10 )
339 set_callbacks( DemuxOpen, DemuxClose )
342 add_shortcut( "v4l2" )
343 add_shortcut( "v4l2c" )
344 set_description( N_("Video4Linux2 Compressed A/V") )
345 set_capability( "access", 0 )
346 /* use these when open as access_demux fails; VLC will use another demux */
347 set_callbacks( AccessOpen, AccessClose )
351 /*****************************************************************************
352 * Access: local prototypes
353 *****************************************************************************/
355 static void CommonClose( vlc_object_t *, demux_sys_t * );
356 static void ParseMRL( demux_sys_t *, char *, vlc_object_t * );
357 static void GetV4L2Params( demux_sys_t *, vlc_object_t * );
358 static void SetAvailControlsByString( vlc_object_t *, demux_sys_t *, int );
360 static int DemuxControl( demux_t *, int, va_list );
361 static int AccessControl( access_t *, int, va_list );
363 static int Demux( demux_t * );
364 static ssize_t AccessRead( access_t *, uint8_t *, size_t );
366 static block_t* GrabVideo( demux_t *p_demux );
367 static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame, size_t );
369 static bool IsPixelFormatSupported( demux_t *p_demux,
370 unsigned int i_pixelformat );
372 static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
373 static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
374 const char *psz_device );
376 static int ControlList( vlc_object_t *, demux_sys_t *, int , bool, bool );
377 static int Control( vlc_object_t *, demux_sys_t *, int i_fd,
378 const char *psz_name, int i_cid, int i_value );
380 static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
381 vlc_value_t oldval, vlc_value_t newval,
383 static int DemuxControlResetCallback( vlc_object_t *p_this, const char *psz_var,
384 vlc_value_t oldval, vlc_value_t newval,
386 static int AccessControlCallback( vlc_object_t *p_this, const char *psz_var,
387 vlc_value_t oldval, vlc_value_t newval,
389 static int AccessControlResetCallback( vlc_object_t *p_this,
390 const char *psz_var, vlc_value_t oldval,
391 vlc_value_t newval, void *p_data );
396 vlc_fourcc_t i_fourcc;
400 } v4l2chroma_to_fourcc[] =
403 { V4L2_PIX_FMT_GREY, VLC_CODEC_GREY, 0, 0, 0 },
404 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
405 { V4L2_PIX_FMT_RGB555, VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
406 { V4L2_PIX_FMT_RGB565, VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
407 /* Won't work since we don't know how to handle such gmask values
409 { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
410 { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
412 { V4L2_PIX_FMT_BGR24, VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
413 { V4L2_PIX_FMT_RGB24, VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
414 { V4L2_PIX_FMT_BGR32, VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
415 { V4L2_PIX_FMT_RGB32, VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
416 { V4L2_PIX_FMT_YUYV, VLC_CODEC_YUYV, 0, 0, 0 },
417 { V4L2_PIX_FMT_UYVY, VLC_CODEC_UYVY, 0, 0, 0 },
418 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
419 { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
420 { V4L2_PIX_FMT_YVU420, VLC_CODEC_YV12, 0, 0, 0 },
421 { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
422 { V4L2_PIX_FMT_YUV410, VLC_CODEC_I410, 0, 0, 0 },
424 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
426 { V4L2_PIX_FMT_YUV420, VLC_CODEC_I420, 0, 0, 0 },
427 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_CODEC_RGB32 }, */
429 /* Compressed data types */
430 { V4L2_PIX_FMT_MJPEG, VLC_CODEC_MJPG, 0, 0, 0 },
432 { V4L2_PIX_FMT_JPEG, VLC_FOURCC('J','P','E','G') },
433 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
434 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
440 * List of V4L2 chromas were confident enough to use as fallbacks if the
441 * user hasn't provided a --v4l2-chroma value.
443 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
445 static const __u32 p_chroma_fallbacks[] =
446 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
447 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
448 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG };
452 const char *psz_name;
456 { "brightness", V4L2_CID_BRIGHTNESS },
457 { "contrast", V4L2_CID_CONTRAST },
458 { "saturation", V4L2_CID_SATURATION },
459 { "hue", V4L2_CID_HUE },
460 { "audio-volume", V4L2_CID_AUDIO_VOLUME },
461 { "audio-balance", V4L2_CID_AUDIO_BALANCE },
462 { "audio-bass", V4L2_CID_AUDIO_BASS },
463 { "audio-treble", V4L2_CID_AUDIO_TREBLE },
464 { "audio-mute", V4L2_CID_AUDIO_MUTE },
465 { "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
466 { "black-level", V4L2_CID_BLACK_LEVEL },
467 { "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
468 { "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
469 { "red-balance", V4L2_CID_RED_BALANCE },
470 { "blue-balance", V4L2_CID_BLUE_BALANCE },
471 { "gamma", V4L2_CID_GAMMA },
472 { "exposure", V4L2_CID_EXPOSURE },
473 { "autogain", V4L2_CID_AUTOGAIN },
474 { "gain", V4L2_CID_GAIN },
475 { "hflip", V4L2_CID_HFLIP },
476 { "vflip", V4L2_CID_VFLIP },
477 { "hcenter", V4L2_CID_HCENTER },
478 { "vcenter", V4L2_CID_VCENTER },
490 char *psz_device; /* Main device from MRL */
493 char *psz_requested_chroma;
500 struct v4l2_capability dev_cap;
503 struct v4l2_input *p_inputs;
504 int i_selected_input;
507 struct v4l2_standard *p_standards;
508 v4l2_std_id i_selected_standard_id;
511 /* V4L2 devices cannot have more than 32 audio inputs */
512 struct v4l2_audio p_audios[32];
513 int i_selected_audio_input;
516 struct v4l2_tuner *p_tuners;
519 struct v4l2_fmtdesc *p_codecs;
521 struct buffer_t *p_buffers;
522 unsigned int i_nbuffers;
526 float f_fps; /* <= 0.0 mean to grab at full rate */
527 mtime_t i_video_pts; /* only used when f_fps > 0 */
543 int (*pf_close)( int );
544 int (*pf_dup)( int );
545 int (*pf_ioctl)( int, unsigned long int, ... );
546 ssize_t (*pf_read)( int, void *, size_t );
547 void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
548 int (*pf_munmap)( void *, size_t );
554 static void use_kernel_v4l2( demux_sys_t *p_sys )
556 p_sys->pf_close = close;
558 p_sys->pf_ioctl = ioctl;
559 p_sys->pf_read = read;
560 p_sys->pf_mmap = mmap;
561 p_sys->pf_munmap = munmap;
562 p_sys->b_libv4l2 = false;
565 static void use_libv4l2( demux_sys_t *p_sys )
567 p_sys->pf_close = v4l2_close;
568 p_sys->pf_dup = v4l2_dup;
569 p_sys->pf_ioctl = v4l2_ioctl;
570 p_sys->pf_read = v4l2_read;
571 p_sys->pf_mmap = v4l2_mmap;
572 p_sys->pf_munmap = v4l2_munmap;
573 p_sys->b_libv4l2 = true;
576 # define v4l2_close (p_sys->pf_close)
577 # define v4l2_dup (p_sys->pf_dup)
578 # define v4l2_ioctl (p_sys->pf_ioctl)
579 # define v4l2_read (p_sys->pf_read)
580 # define v4l2_mmap (p_sys->pf_mmap)
581 # define v4l2_munmap (p_sys->pf_munmap)
583 # define v4l2_close close
584 # define v4l2_dup dup
585 # define v4l2_ioctl ioctl
586 # define v4l2_read read
587 # define v4l2_mmap mmap
588 # define v4l2_munmap munmap
591 static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
594 /* TODO: if using default device, loop through all /dev/video* until
596 msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
597 if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
599 msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
600 p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
603 if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
607 /*****************************************************************************
608 * DemuxOpen: opens v4l2 device, access_demux callback
609 *****************************************************************************
611 * url: <video device>::::
613 *****************************************************************************/
614 static int DemuxOpen( vlc_object_t *p_this )
616 demux_t *p_demux = (demux_t*)p_this;
619 /* Only when selected */
620 if( strcmp( p_demux->psz_access, "v4l2" ) )
624 p_demux->pf_control = DemuxControl;
625 p_demux->pf_demux = Demux;
626 p_demux->info.i_update = 0;
627 p_demux->info.i_title = 0;
628 p_demux->info.i_seekpoint = 0;
630 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
631 if( p_sys == NULL ) return VLC_ENOMEM;
633 GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
635 ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
638 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
640 msg_Dbg( p_this, "Trying direct kernel v4l2" );
641 use_kernel_v4l2( p_sys );
642 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
646 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
647 use_libv4l2( p_sys );
649 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
652 DemuxClose( p_this );
656 /*****************************************************************************
657 * GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
658 *****************************************************************************/
659 static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
661 p_sys->i_video_pts = -1;
663 p_sys->i_selected_standard_id =
664 i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
666 p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
667 p_sys->i_selected_audio_input =
668 var_CreateGetInteger( p_obj, "v4l2-audio-input" );
670 p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
672 p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
673 p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
675 var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
677 p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
678 p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
680 p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
682 p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
683 p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
684 p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
686 p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
688 p_sys->psz_device = NULL;
694 /*****************************************************************************
695 * ParseMRL: parse the options contained in the MRL
696 *****************************************************************************/
697 static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
699 char *psz_dup = strdup( psz_path );
700 char *psz_parser = psz_dup;
702 while( *psz_parser && *psz_parser != ':' )
707 if( *psz_parser == ':' )
712 *psz_parser++ = '\0';
714 if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
716 psz_parser += strlen( "standard=" );
717 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
719 p_sys->i_selected_standard_id = V4L2_STD_PAL;
720 psz_parser += strlen( "pal" );
722 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
724 p_sys->i_selected_standard_id = V4L2_STD_NTSC;
725 psz_parser += strlen( "ntsc" );
727 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
729 p_sys->i_selected_standard_id = V4L2_STD_SECAM;
730 psz_parser += strlen( "secam" );
732 else if( !strncmp( psz_parser, "default", strlen( "default" ) ) )
734 p_sys->i_selected_standard_id = V4L2_STD_UNKNOWN;
735 psz_parser += strlen( "default" );
739 p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
742 else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
746 psz_parser += strlen( "chroma=" );
747 if( strchr( psz_parser, ':' ) )
749 i_len = strchr( psz_parser, ':' ) - psz_parser;
753 i_len = strlen( psz_parser );
756 free( p_sys->psz_requested_chroma );
757 p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
761 else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
763 p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
766 else if( !strncmp( psz_parser, "audio-input=", strlen( "audio-input=" ) ) )
768 p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-input=" ),
771 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
773 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
776 else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
778 psz_parser += strlen( "io=" );
779 if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
781 p_sys->io = IO_METHOD_READ;
782 psz_parser += strlen( "read" );
784 else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
786 p_sys->io = IO_METHOD_MMAP;
787 psz_parser += strlen( "mmap" );
789 else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
791 p_sys->io = IO_METHOD_USERPTR;
792 psz_parser += strlen( "userptr" );
796 p_sys->io = strtol( psz_parser, &psz_parser, 0 );
799 else if( !strncmp( psz_parser, "width=",
800 strlen( "width=" ) ) )
803 strtol( psz_parser + strlen( "width=" ),
806 else if( !strncmp( psz_parser, "height=",
807 strlen( "height=" ) ) )
810 strtol( psz_parser + strlen( "height=" ),
813 else if( !strncmp( psz_parser, "controls-reset",
814 strlen( "controls-reset" ) ) )
816 var_SetBool( p_obj, "v4l2-controls-reset", true );
817 psz_parser += strlen( "controls-reset" );
820 else if( !strncmp( psz_parser, "brightness=",
821 strlen( "brightness=" ) ) )
823 var_SetInteger( p_obj, "brightness",
824 strtol( psz_parser + strlen( "brightness=" ),
827 else if( !strncmp( psz_parser, "contrast=",
828 strlen( "contrast=" ) ) )
830 var_SetInteger( p_obj, "contrast",
831 strtol( psz_parser + strlen( "contrast=" ),
834 else if( !strncmp( psz_parser, "saturation=",
835 strlen( "saturation=" ) ) )
837 var_SetInteger( p_obj, "saturation",
838 strtol( psz_parser + strlen( "saturation=" ),
841 else if( !strncmp( psz_parser, "hue=",
844 var_SetInteger( p_obj, "hue",
845 strtol( psz_parser + strlen( "hue=" ),
848 else if( !strncmp( psz_parser, "gamma=",
849 strlen( "gamma=" ) ) )
851 var_SetInteger( p_obj, "gamma",
852 strtol( psz_parser + strlen( "gamma=" ),
856 else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
858 p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
861 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
863 p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
866 else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
868 p_sys->i_frequency = strtol( psz_parser
869 + strlen( "tuner-frequency=" ),
872 else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
874 p_sys->i_audio_mode = strtol( psz_parser
875 + strlen( "tuner-audio-mode=" ),
878 else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
882 psz_parser += strlen( "set-ctrls=" );
883 if( strchr( psz_parser, ':' ) )
885 i_len = strchr( psz_parser, ':' ) - psz_parser;
889 i_len = strlen( psz_parser );
892 p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
896 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
897 || !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
898 || !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
899 || !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
900 || !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
902 if( strchr( psz_parser, ':' ) )
904 psz_parser = strchr( psz_parser, ':' );
908 psz_parser += strlen( psz_parser );
911 msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
915 char *psz_unk = strchr( psz_parser, ':' );
917 psz_unk = strndup( psz_parser, psz_unk - psz_parser );
919 psz_unk = strdup( psz_parser);
920 msg_Warn( p_obj, "unknown option %s", psz_unk );
924 while( *psz_parser && *psz_parser != ':' )
929 if( *psz_parser == '\0' )
938 p_sys->psz_device = strdup( psz_dup );
940 p_sys->psz_device = strdup( V4L2_DEFAULT );
944 /*****************************************************************************
945 * Close: close device, free resources
946 *****************************************************************************/
947 static void AccessClose( vlc_object_t *p_this )
949 access_t *p_access = (access_t *)p_this;
950 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
952 CommonClose( p_this, p_sys );
955 static void DemuxClose( vlc_object_t *p_this )
957 struct v4l2_buffer buf;
958 enum v4l2_buf_type buf_type;
961 demux_t *p_demux = (demux_t *)p_this;
962 demux_sys_t *p_sys = p_demux->p_sys;
964 /* Stop video capture */
965 if( p_sys->i_fd >= 0 )
974 case IO_METHOD_USERPTR:
975 /* Some drivers 'hang' internally if this is not done before streamoff */
976 for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
978 memset( &buf, 0, sizeof(buf) );
979 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
980 buf.memory = ( p_sys->io == IO_METHOD_USERPTR ) ?
981 V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
982 v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
985 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
986 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
987 msg_Err( p_this, "VIDIOC_STREAMOFF failed" );
994 /* Free Video Buffers */
995 if( p_sys->p_buffers ) {
999 free( p_sys->p_buffers[0].start );
1002 case IO_METHOD_MMAP:
1003 for( i = 0; i < p_sys->i_nbuffers; ++i )
1005 if( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
1007 msg_Err( p_this, "munmap failed" );
1012 case IO_METHOD_USERPTR:
1013 for( i = 0; i < p_sys->i_nbuffers; ++i )
1015 free( p_sys->p_buffers[i].start );
1019 free( p_sys->p_buffers );
1022 CommonClose( p_this, p_sys );
1025 static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
1029 if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
1030 free( p_sys->psz_device );
1031 free( p_sys->p_standards );
1032 free( p_sys->p_inputs );
1033 free( p_sys->p_tuners );
1034 free( p_sys->p_codecs );
1035 free( p_sys->psz_requested_chroma );
1036 free( p_sys->psz_set_ctrls );
1041 /*****************************************************************************
1042 * AccessOpen: opens v4l2 device, access callback
1043 *****************************************************************************
1045 * url: <video device>::::
1047 *****************************************************************************/
1048 static int AccessOpen( vlc_object_t * p_this )
1050 access_t *p_access = (access_t*) p_this;
1051 demux_sys_t * p_sys;
1053 /* Only when selected */
1054 if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
1056 access_InitFields( p_access );
1057 ACCESS_SET_CALLBACKS( AccessRead, NULL, AccessControl, NULL );
1058 p_sys = calloc( 1, sizeof( demux_sys_t ));
1059 if( !p_sys ) return VLC_ENOMEM;
1060 p_access->p_sys = (access_sys_t*)p_sys;
1062 GetV4L2Params( p_sys, (vlc_object_t *) p_access );
1064 ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
1067 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
1069 msg_Dbg( p_this, "Trying direct kernel v4l2" );
1070 use_kernel_v4l2( p_sys );
1071 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
1075 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
1076 use_libv4l2( p_sys );
1078 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
1081 AccessClose( p_this );
1082 return VLC_EGENERIC;
1085 /*****************************************************************************
1087 *****************************************************************************/
1088 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
1090 demux_sys_t *p_sys = p_demux->p_sys;
1096 /* Special for access_demux */
1097 case DEMUX_CAN_PAUSE:
1098 case DEMUX_CAN_SEEK:
1099 case DEMUX_SET_PAUSE_STATE:
1100 case DEMUX_CAN_CONTROL_PACE:
1101 pb = (bool*)va_arg( args, bool * );
1105 case DEMUX_GET_PTS_DELAY:
1106 pi64 = (int64_t*)va_arg( args, int64_t * );
1107 *pi64 = (int64_t)p_sys->i_cache * 1000;
1110 case DEMUX_GET_TIME:
1111 pi64 = (int64_t*)va_arg( args, int64_t * );
1115 /* TODO implement others */
1117 return VLC_EGENERIC;
1120 return VLC_EGENERIC;
1123 /*****************************************************************************
1124 * AccessControl: access callback
1125 *****************************************************************************/
1126 static int AccessControl( access_t *p_access, int i_query, va_list args )
1130 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1135 case ACCESS_CAN_SEEK:
1136 case ACCESS_CAN_FASTSEEK:
1137 pb_bool = (bool*)va_arg( args, bool* );
1140 case ACCESS_CAN_PAUSE:
1141 pb_bool = (bool*)va_arg( args, bool* );
1144 case ACCESS_CAN_CONTROL_PACE:
1145 pb_bool = (bool*)va_arg( args, bool* );
1150 case ACCESS_GET_PTS_DELAY:
1151 pi_64 = (int64_t*)va_arg( args, int64_t * );
1152 *pi_64 = (int64_t) p_sys->i_cache * 1000;
1156 case ACCESS_SET_PAUSE_STATE:
1160 case ACCESS_GET_TITLE_INFO:
1161 case ACCESS_SET_TITLE:
1162 case ACCESS_SET_SEEKPOINT:
1163 case ACCESS_SET_PRIVATE_ID_STATE:
1164 case ACCESS_GET_CONTENT_TYPE:
1165 case ACCESS_GET_META:
1166 return VLC_EGENERIC;
1169 msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1170 return VLC_EGENERIC;
1176 /*****************************************************************************
1177 * AccessRead: access callback
1178 ******************************************************************************/
1179 static ssize_t AccessRead( access_t * p_access, uint8_t * p_buffer, size_t i_len )
1181 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1185 ufd.fd = p_sys->i_fd;
1186 ufd.events = POLLIN;
1188 if( p_access->info.b_eof )
1193 if( !vlc_object_alive (p_access) )
1198 while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
1202 msg_Err( p_access, "Polling error (%m)." );
1206 i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
1209 p_access->info.b_eof = true;
1211 else if( i_ret > 0 )
1213 p_access->info.i_pos += i_ret;
1219 /*****************************************************************************
1220 * Demux: Processes the audio or video frame
1221 *****************************************************************************/
1222 static int Demux( demux_t *p_demux )
1224 demux_sys_t *p_sys = p_demux->p_sys;
1227 fd.fd = p_sys->i_fd;
1228 fd.events = POLLIN|POLLPRI;
1232 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1234 if( fd.revents & (POLLIN|POLLPRI) )
1236 block_t *p_block = GrabVideo( p_demux );
1239 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1240 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1248 /*****************************************************************************
1249 * GrabVideo: Grab a video frame
1250 *****************************************************************************/
1251 static block_t* GrabVideo( demux_t *p_demux )
1253 demux_sys_t *p_sys = p_demux->p_sys;
1255 block_t *p_block = NULL;
1256 struct v4l2_buffer buf;
1259 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1261 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1263 /* Did we wait long enough ? (frame rate reduction) */
1264 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1267 /* Grab Video Frame */
1270 case IO_METHOD_READ:
1271 i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1279 /* Could ignore EIO, see spec. */
1282 msg_Err( p_demux, "Failed to read frame" );
1287 p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1288 if( !p_block ) return 0;
1292 case IO_METHOD_MMAP:
1293 memset( &buf, 0, sizeof(buf) );
1294 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1295 buf.memory = V4L2_MEMORY_MMAP;
1297 /* Wait for next frame */
1298 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1305 /* Could ignore EIO, see spec. */
1308 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1313 if( buf.index >= p_sys->i_nbuffers ) {
1314 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1318 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1319 if( !p_block ) return 0;
1322 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1324 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1325 block_Release( p_block );
1331 case IO_METHOD_USERPTR:
1332 memset( &buf, 0, sizeof(buf) );
1333 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1334 buf.memory = V4L2_MEMORY_USERPTR;
1336 /* Wait for next frame */
1337 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1344 /* Could ignore EIO, see spec. */
1347 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1354 for( i = 0; i < p_sys->i_nbuffers; i++ )
1356 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1357 buf.length == p_sys->p_buffers[i].length ) break;
1360 if( i >= p_sys->i_nbuffers )
1362 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1366 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1367 if( !p_block ) return 0;
1370 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1372 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1373 block_Release( p_block );
1382 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1387 /*****************************************************************************
1388 * ProcessVideoFrame: Helper function to take a buffer and copy it into
1390 *****************************************************************************/
1391 static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame, size_t i_size )
1395 if( !p_frame ) return 0;
1398 if( !( p_block = block_New( p_demux, i_size ) ) )
1400 msg_Warn( p_demux, "Cannot get new block" );
1405 memcpy( p_block->p_buffer, p_frame, i_size );
1410 /*****************************************************************************
1411 * Helper function to initalise video IO using the Read method
1412 *****************************************************************************/
1413 static int InitRead( demux_t *p_demux, unsigned int i_buffer_size )
1415 demux_sys_t *p_sys = p_demux->p_sys;
1417 p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1418 if( !p_sys->p_buffers )
1419 return VLC_EGENERIC;
1421 p_sys->p_buffers[0].length = i_buffer_size;
1422 p_sys->p_buffers[0].start = malloc( i_buffer_size );
1423 if( !p_sys->p_buffers[0].start )
1429 /*****************************************************************************
1430 * Helper function to initalise video IO using the mmap method
1431 *****************************************************************************/
1432 static int InitMmap( demux_t *p_demux, int i_fd )
1434 demux_sys_t *p_sys = p_demux->p_sys;
1435 struct v4l2_requestbuffers req;
1437 memset( &req, 0, sizeof(req) );
1439 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1440 req.memory = V4L2_MEMORY_MMAP;
1442 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1444 msg_Err( p_demux, "device does not support mmap i/o" );
1450 msg_Err( p_demux, "Insufficient buffer memory" );
1454 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1455 if( !p_sys->p_buffers )
1458 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1460 struct v4l2_buffer buf;
1462 memset( &buf, 0, sizeof(buf) );
1463 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1464 buf.memory = V4L2_MEMORY_MMAP;
1465 buf.index = p_sys->i_nbuffers;
1467 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1469 msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1473 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1474 p_sys->p_buffers[p_sys->i_nbuffers].start =
1475 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1477 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1479 msg_Err( p_demux, "mmap failed (%m)" );
1487 return VLC_EGENERIC;
1491 /*****************************************************************************
1492 * Helper function to initalise video IO using the userbuf method
1493 *****************************************************************************/
1494 static int InitUserP( demux_t *p_demux, int i_fd, unsigned int i_buffer_size )
1496 demux_sys_t *p_sys = p_demux->p_sys;
1497 struct v4l2_requestbuffers req;
1498 unsigned int i_page_size;
1500 i_page_size = sysconf(_SC_PAGESIZE);
1501 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1503 memset( &req, 0, sizeof(req) );
1505 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1506 req.memory = V4L2_MEMORY_USERPTR;
1508 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1510 msg_Err( p_demux, "device does not support user pointer i/o" );
1511 return VLC_EGENERIC;
1514 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1515 if( !p_sys->p_buffers )
1518 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1520 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1521 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1522 /* boundary */ i_page_size, i_buffer_size ) )
1529 free( p_sys->p_buffers );
1530 return VLC_EGENERIC;
1534 /*****************************************************************************
1535 * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1536 * in the array of supported formats returned by the driver
1537 *****************************************************************************/
1538 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1540 demux_sys_t *p_sys = p_demux->p_sys;
1542 for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1544 if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1551 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1552 uint32_t i_pixel_format,
1553 uint32_t i_width, uint32_t i_height )
1556 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1558 demux_sys_t *p_sys = p_demux->p_sys;
1560 /* This is new in Linux 2.6.19 */
1561 struct v4l2_frmivalenum frmival;
1562 memset( &frmival, 0, sizeof(frmival) );
1563 frmival.pixel_format = i_pixel_format;
1564 frmival.width = i_width;
1565 frmival.height = i_height;
1566 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1568 switch( frmival.type )
1570 case V4L2_FRMIVAL_TYPE_DISCRETE:
1572 float f_fps_max = -1;
1575 float f_fps = (float)frmival.discrete.denominator
1576 / (float)frmival.discrete.numerator;
1577 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1579 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1583 case V4L2_FRMSIZE_TYPE_STEPWISE:
1584 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1585 return __MAX( (float)frmival.stepwise.max.denominator
1586 / (float)frmival.stepwise.max.numerator,
1587 (float)frmival.stepwise.min.denominator
1588 / (float)frmival.stepwise.min.numerator );
1595 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1596 uint32_t i_pixel_format )
1598 float f_fps_max = -1.;
1599 #ifdef VIDIOC_ENUM_FRAMESIZES
1601 demux_sys_t *p_sys = p_demux->p_sys;
1603 /* This is new in Linux 2.6.19 */
1604 struct v4l2_frmsizeenum frmsize;
1605 memset( &frmsize, 0, sizeof(frmsize) );
1606 frmsize.pixel_format = i_pixel_format;
1607 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1609 switch( frmsize.type )
1611 case V4L2_FRMSIZE_TYPE_DISCRETE:
1615 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1617 frmsize.discrete.width,
1618 frmsize.discrete.height );
1619 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1620 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1623 case V4L2_FRMSIZE_TYPE_STEPWISE:
1625 uint32_t i_width = frmsize.stepwise.min_width;
1626 uint32_t i_height = frmsize.stepwise.min_height;
1628 i_width <= frmsize.stepwise.max_width &&
1629 i_height <= frmsize.stepwise.max_width;
1630 i_width += frmsize.stepwise.step_width,
1631 i_height += frmsize.stepwise.step_height )
1633 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1635 i_width, i_height );
1636 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1640 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1642 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1643 f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1645 frmsize.stepwise.max_width,
1646 frmsize.stepwise.max_height );
1654 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1655 uint32_t i_pixel_format, float f_fps_min,
1656 uint32_t *pi_width, uint32_t *pi_height )
1660 #ifdef VIDIOC_ENUM_FRAMESIZES
1662 demux_sys_t *p_sys = p_demux->p_sys;
1664 /* This is new in Linux 2.6.19 */
1665 struct v4l2_frmsizeenum frmsize;
1666 memset( &frmsize, 0, sizeof(frmsize) );
1667 frmsize.pixel_format = i_pixel_format;
1668 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1670 switch( frmsize.type )
1672 case V4L2_FRMSIZE_TYPE_DISCRETE:
1676 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1678 frmsize.discrete.width,
1679 frmsize.discrete.height );
1680 if( f_fps >= f_fps_min &&
1681 frmsize.discrete.width > *pi_width )
1683 *pi_width = frmsize.discrete.width;
1684 *pi_height = frmsize.discrete.height;
1686 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1689 case V4L2_FRMSIZE_TYPE_STEPWISE:
1691 uint32_t i_width = frmsize.stepwise.min_width;
1692 uint32_t i_height = frmsize.stepwise.min_height;
1694 i_width <= frmsize.stepwise.max_width &&
1695 i_height <= frmsize.stepwise.max_width;
1696 i_width += frmsize.stepwise.step_width,
1697 i_height += frmsize.stepwise.step_height )
1699 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1701 i_width, i_height );
1702 if( f_fps >= f_fps_min && i_width > *pi_width )
1704 *pi_width = i_width;
1705 *pi_height = i_height;
1710 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1712 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1713 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1715 frmsize.stepwise.max_width,
1716 frmsize.stepwise.max_height );
1717 if( f_fps >= f_fps_min &&
1718 frmsize.stepwise.max_width > *pi_width )
1720 *pi_width = frmsize.stepwise.max_width;
1721 *pi_height = frmsize.stepwise.max_height;
1729 /*****************************************************************************
1730 * OpenVideoDev: open and set up the video device and probe for capabilities
1731 *****************************************************************************/
1732 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1735 struct v4l2_cropcap cropcap;
1736 struct v4l2_crop crop;
1737 struct v4l2_format fmt;
1739 enum v4l2_buf_type buf_type;
1740 const char *psz_device = p_sys->psz_device;
1743 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
1745 msg_Err( p_obj, "cannot open device (%m)" );
1750 /* Note the v4l2_xxx functions are designed so that if they get passed an
1751 unknown fd, the will behave exactly as their regular xxx counterparts,
1752 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1753 custom cam format to normal formats conversion). Chances are big we will
1754 still fail then though, as normally v4l2_fd_open only fails if the
1755 device is not a v4l2 device. */
1756 if( p_sys->b_libv4l2 )
1759 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1760 if( libv4l2_fd != -1 )
1765 /* Tune the tuner */
1766 if( p_sys->i_frequency >= 0 )
1768 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1770 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1773 struct v4l2_frequency frequency;
1774 memset( &frequency, 0, sizeof( frequency ) );
1775 frequency.tuner = p_sys->i_cur_tuner;
1776 frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1777 frequency.frequency = p_sys->i_frequency / 62.5;
1778 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1780 msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1783 msg_Dbg( p_obj, "Tuner frequency set" );
1786 /* Set the tuner's audio mode */
1787 if( p_sys->i_audio_mode >= 0 )
1789 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1791 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1794 struct v4l2_tuner tuner;
1795 memset( &tuner, 0, sizeof( tuner ) );
1796 tuner.index = p_sys->i_cur_tuner;
1797 tuner.audmode = p_sys->i_audio_mode;
1798 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1800 msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1803 msg_Dbg( p_obj, "Tuner audio mode set" );
1806 /* Select standard */
1808 if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1810 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1812 msg_Err( p_obj, "cannot set standard (%m)" );
1815 msg_Dbg( p_obj, "Set standard" );
1820 if( p_sys->i_selected_input >= p_sys->i_input )
1822 msg_Warn( p_obj, "invalid input. Using the default one" );
1823 p_sys->i_selected_input = 0;
1826 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1828 msg_Err( p_obj, "cannot set input (%m)" );
1832 /* Set audio input */
1834 if( p_sys->i_audio > 0 )
1836 if( p_sys->i_selected_audio_input < 0
1837 || p_sys->i_selected_audio_input >= p_sys->i_audio )
1839 msg_Warn( p_obj, "invalid audio input. Using the default one" );
1840 p_sys->i_selected_audio_input = 0;
1843 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1845 msg_Err( p_obj, "cannot set audio input (%m)" );
1848 msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1852 /* TODO: Move the resolution stuff up here */
1853 /* if MPEG encoder card, no need to do anything else after this */
1854 ControlList( p_obj, p_sys, i_fd,
1855 var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1856 SetAvailControlsByString( p_obj, p_sys, i_fd );
1858 if( false == b_demux)
1863 demux_t *p_demux = (demux_t *) p_obj;
1865 /* Verify device support for the various IO methods */
1868 case IO_METHOD_READ:
1869 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1871 msg_Err( p_obj, "device does not support read i/o" );
1876 case IO_METHOD_MMAP:
1877 case IO_METHOD_USERPTR:
1878 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1880 msg_Err( p_obj, "device does not support streaming i/o" );
1886 msg_Err( p_obj, "io method not supported" );
1890 /* Reset Cropping */
1891 memset( &cropcap, 0, sizeof(cropcap) );
1892 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1893 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1895 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1896 crop.c = cropcap.defrect; /* reset to default */
1897 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1902 /* Cropping not supported. */
1905 /* Errors ignored. */
1911 /* Try and find default resolution if not specified */
1912 memset( &fmt, 0, sizeof(fmt) );
1913 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1915 if( p_sys->i_width == 0 || p_sys->i_height == 0 )
1917 /* Use current width and height settings */
1918 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
1920 msg_Err( p_demux, "Cannot get default width and height." );
1924 p_sys->i_width = fmt.fmt.pix.width;
1925 p_sys->i_height = fmt.fmt.pix.height;
1927 if( fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE )
1929 p_sys->i_height = p_sys->i_height * 2;
1932 else if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1934 msg_Dbg( p_demux, "will try to find optimal width and height." );
1938 /* Use user specified width and height */
1939 msg_Dbg( p_demux, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
1942 fmt.fmt.pix.width = p_sys->i_width;
1943 fmt.fmt.pix.height = p_sys->i_height;
1944 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1946 /* Test and set Chroma */
1947 fmt.fmt.pix.pixelformat = 0;
1948 if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
1950 /* User specified chroma */
1951 const vlc_fourcc_t i_requested_fourcc =
1952 vlc_fourcc_GetCodecFromString( VIDEO_ES, p_sys->psz_requested_chroma );
1954 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
1956 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
1958 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
1962 /* Try and set user chroma */
1963 if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ( fmt.fmt.pix.pixelformat && v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) )
1965 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
1966 fmt.fmt.pix.pixelformat = 0;
1970 /* If no user specified chroma, find best */
1971 /* This also decides if MPEG encoder card or not */
1972 if( !fmt.fmt.pix.pixelformat )
1975 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
1977 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
1978 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat )
1979 && v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1982 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
1984 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
1989 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1991 if( p_sys->f_fps <= 0 )
1993 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
1994 fmt.fmt.pix.pixelformat );
1995 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
1997 GetMaxDimensions( p_demux, i_fd,
1998 fmt.fmt.pix.pixelformat, p_sys->f_fps,
1999 &fmt.fmt.pix.width, &fmt.fmt.pix.height );
2000 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f of %dx%d",
2001 p_sys->f_fps, fmt.fmt.pix.width, fmt.fmt.pix.height );
2002 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) {;}
2005 /* Reassign width, height and chroma incase driver override */
2006 p_sys->i_width = fmt.fmt.pix.width;
2007 p_sys->i_height = fmt.fmt.pix.height;
2009 /* Check interlacing */
2010 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
2011 switch( fmt.fmt.pix.field )
2013 case V4L2_FIELD_NONE:
2014 msg_Dbg( p_demux, "Interlacing setting: progressive" );
2016 case V4L2_FIELD_TOP:
2017 msg_Dbg( p_demux, "Interlacing setting: top field only" );
2019 case V4L2_FIELD_BOTTOM:
2020 msg_Dbg( p_demux, "Interlacing setting: bottom field only" );
2022 case V4L2_FIELD_INTERLACED:
2023 msg_Dbg( p_demux, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2025 case V4L2_FIELD_SEQ_TB:
2026 msg_Dbg( p_demux, "Interlacing setting: sequential top bottom" );
2028 case V4L2_FIELD_SEQ_BT:
2029 msg_Dbg( p_demux, "Interlacing setting: sequential bottom top" );
2031 case V4L2_FIELD_ALTERNATE:
2032 msg_Dbg( p_demux, "Interlacing setting: alternate fields" );
2034 case V4L2_FIELD_INTERLACED_TB:
2035 msg_Dbg( p_demux, "Interlacing setting: interleaved top bottom" );
2037 case V4L2_FIELD_INTERLACED_BT:
2038 msg_Dbg( p_demux, "Interlacing setting: interleaved bottom top" );
2041 msg_Warn( p_demux, "Interlacing setting: unknown type (%d)",
2042 fmt.fmt.pix.field );
2045 if( fmt.fmt.pix.field != V4L2_FIELD_NONE )
2046 msg_Warn( p_demux, "Interlaced inputs haven't been tested. Please report any issue." );
2048 /* Look up final fourcc */
2049 p_sys->i_fourcc = 0;
2050 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2052 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2054 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2055 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2056 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2057 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2058 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2063 /* Buggy driver paranoia */
2064 i_min = fmt.fmt.pix.width * 2;
2065 if( fmt.fmt.pix.bytesperline < i_min )
2066 fmt.fmt.pix.bytesperline = i_min;
2067 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2068 if( fmt.fmt.pix.sizeimage < i_min )
2069 fmt.fmt.pix.sizeimage = i_min;
2071 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2072 /* This is new in Linux 2.6.19 */
2073 /* List supported frame rates */
2074 struct v4l2_frmivalenum frmival;
2075 memset( &frmival, 0, sizeof(frmival) );
2076 frmival.pixel_format = fmt.fmt.pix.pixelformat;
2077 frmival.width = p_sys->i_width;
2078 frmival.height = p_sys->i_height;
2079 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2082 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2083 vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2084 msg_Dbg( p_demux, "supported frame intervals for %4s, %dx%d:",
2085 psz_fourcc, frmival.width, frmival.height );
2086 switch( frmival.type )
2088 case V4L2_FRMIVAL_TYPE_DISCRETE:
2091 msg_Dbg( p_demux, " supported frame interval: %d/%d",
2092 frmival.discrete.numerator,
2093 frmival.discrete.denominator );
2095 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2097 case V4L2_FRMIVAL_TYPE_STEPWISE:
2098 msg_Dbg( p_demux, " supported frame intervals: %d/%d to "
2099 "%d/%d using %d/%d increments",
2100 frmival.stepwise.min.numerator,
2101 frmival.stepwise.min.denominator,
2102 frmival.stepwise.max.numerator,
2103 frmival.stepwise.max.denominator,
2104 frmival.stepwise.step.numerator,
2105 frmival.stepwise.step.denominator );
2107 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2108 msg_Dbg( p_demux, " supported frame intervals: %d/%d to %d/%d",
2109 frmival.stepwise.min.numerator,
2110 frmival.stepwise.min.denominator,
2111 frmival.stepwise.max.numerator,
2112 frmival.stepwise.max.denominator );
2119 /* Init IO method */
2122 case IO_METHOD_READ:
2123 if( InitRead( p_demux, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2126 case IO_METHOD_MMAP:
2127 if( InitMmap( p_demux, i_fd ) != VLC_SUCCESS ) goto open_failed;
2130 case IO_METHOD_USERPTR:
2131 if( InitUserP( p_demux, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2137 es_fmt.video.i_width = p_sys->i_width;
2138 es_fmt.video.i_height = p_sys->i_height;
2139 es_fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
2141 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2142 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2143 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2149 case IO_METHOD_READ:
2153 case IO_METHOD_MMAP:
2154 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2156 struct v4l2_buffer buf;
2158 memset( &buf, 0, sizeof(buf) );
2159 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2160 buf.memory = V4L2_MEMORY_MMAP;
2163 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2165 msg_Err( p_demux, "VIDIOC_QBUF failed" );
2170 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2171 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2173 msg_Err( p_demux, "VIDIOC_STREAMON failed" );
2179 case IO_METHOD_USERPTR:
2180 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2182 struct v4l2_buffer buf;
2184 memset( &buf, 0, sizeof(buf) );
2185 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2186 buf.memory = V4L2_MEMORY_USERPTR;
2188 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2189 buf.length = p_sys->p_buffers[i].length;
2191 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2193 msg_Err( p_demux, "VIDIOC_QBUF failed" );
2198 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2199 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2201 msg_Err( p_demux, "VIDIOC_STREAMON failed" );
2209 if( p_sys->f_fps >= 0.1 )
2211 msg_Dbg( p_demux, "User set fps=%f", p_sys->f_fps );
2217 if( i_fd >= 0 ) v4l2_close( i_fd );
2222 /*****************************************************************************
2223 * ProbeVideoDev: probe video for capabilities
2224 *****************************************************************************/
2225 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2226 const char *psz_device )
2233 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
2235 msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2240 /* Note the v4l2_xxx functions are designed so that if they get passed an
2241 unknown fd, the will behave exactly as their regular xxx counterparts,
2242 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2243 custom cam format to normal formats conversion). Chances are big we will
2244 still fail then though, as normally v4l2_fd_open only fails if the
2245 device is not a v4l2 device. */
2246 if( p_sys->b_libv4l2 )
2249 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2250 if( libv4l2_fd != -1 )
2255 /* Get device capabilites */
2257 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2259 msg_Err( p_obj, "cannot get video capabilities (%m)" );
2263 msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2264 p_sys->dev_cap.card,
2265 p_sys->dev_cap.driver,
2266 (p_sys->dev_cap.version >> 16) & 0xFF,
2267 (p_sys->dev_cap.version >> 8) & 0xFF,
2268 p_sys->dev_cap.version & 0xFF,
2269 p_sys->dev_cap.bus_info );
2271 msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capure, "
2274 ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
2275 ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
2276 ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' ') );
2278 msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2280 "(%c) Asynchronous",
2281 ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2282 ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2283 ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2285 /* Now, enumerate all the video inputs. This is useless at the moment
2286 since we have no way to present that info to the user except with
2289 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2291 struct v4l2_input t_input;
2292 memset( &t_input, 0, sizeof(t_input) );
2293 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2296 t_input.index = p_sys->i_input;
2299 p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2300 if( !p_sys->p_inputs ) goto open_failed;
2302 for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2304 p_sys->p_inputs[i_index].index = i_index;
2306 if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2308 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2311 msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2313 p_sys->p_inputs[i_index].name,
2314 p_sys->p_inputs[i_index].type
2315 == V4L2_INPUT_TYPE_TUNER ?
2317 "External analog input",
2318 i_index == p_sys->i_selected_input ? '*' : ' ' );
2322 /* Probe video standards */
2323 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2325 struct v4l2_standard t_standards;
2326 t_standards.index = 0;
2327 while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2329 p_sys->i_standard++;
2330 t_standards.index = p_sys->i_standard;
2333 p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2334 if( !p_sys->p_standards ) goto open_failed;
2336 for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2338 p_sys->p_standards[i_standard].index = i_standard;
2340 if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2342 msg_Err( p_obj, "cannot get video input standards (%m)" );
2345 msg_Dbg( p_obj, "video standard %i is: %s %c",
2347 p_sys->p_standards[i_standard].name,
2348 (unsigned)i_standard == p_sys->i_selected_standard_id ? '*' : ' ' );
2352 /* initialize the structures for the ioctls */
2353 for( i_index = 0; i_index < 32; i_index++ )
2355 p_sys->p_audios[i_index].index = i_index;
2358 /* Probe audio inputs */
2359 if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2361 while( p_sys->i_audio < 32 &&
2362 v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2364 if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2366 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2370 msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2372 p_sys->p_audios[p_sys->i_audio].name,
2373 p_sys->p_audios[p_sys->i_audio].capability &
2374 V4L2_AUDCAP_STEREO ?
2376 p_sys->p_audios[p_sys->i_audio].capability &
2378 "(Automatic Volume Level supported)" : "",
2379 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2385 /* List tuner caps */
2386 if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2388 struct v4l2_tuner tuner;
2389 memset( &tuner, 0, sizeof(tuner) );
2390 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2393 memset( &tuner, 0, sizeof(tuner) );
2394 tuner.index = p_sys->i_tuner;
2397 p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2398 if( !p_sys->p_tuners ) goto open_failed;
2400 for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2402 p_sys->p_tuners[i_index].index = i_index;
2404 if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2406 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2409 msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2410 "frequency range: %.1f %s -> %.1f %s",
2412 p_sys->p_tuners[i_index].name,
2413 p_sys->p_tuners[i_index].type
2414 == V4L2_TUNER_RADIO ?
2415 "Radio" : "Analog TV",
2416 p_sys->p_tuners[i_index].rangelow * 62.5,
2417 p_sys->p_tuners[i_index].capability &
2418 V4L2_TUNER_CAP_LOW ?
2420 p_sys->p_tuners[i_index].rangehigh * 62.5,
2421 p_sys->p_tuners[i_index].capability &
2422 V4L2_TUNER_CAP_LOW ?
2425 struct v4l2_frequency frequency;
2426 memset( &frequency, 0, sizeof( frequency ) );
2427 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2429 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2432 msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2434 p_sys->p_tuners[i_index].name,
2435 frequency.frequency * 62.5,
2436 p_sys->p_tuners[i_index].capability &
2437 V4L2_TUNER_CAP_LOW ?
2442 /* Probe for available chromas */
2443 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2445 struct v4l2_fmtdesc codec;
2448 memset( &codec, 0, sizeof(codec) );
2449 codec.index = i_index;
2450 codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2452 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2455 codec.index = i_index;
2458 p_sys->i_codec = i_index;
2460 p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2462 for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2464 p_sys->p_codecs[i_index].index = i_index;
2465 p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2467 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2469 msg_Err( p_obj, "cannot get codec description (%m)" );
2473 /* only print if vlc supports the format */
2474 char psz_fourcc_v4l2[5];
2475 memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2476 vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2478 bool b_codec_supported = false;
2479 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2481 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2483 b_codec_supported = true;
2486 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2487 vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2489 msg_Dbg( p_obj, "device supports chroma %4s [%s, %s]",
2491 p_sys->p_codecs[i_index].description,
2494 #ifdef VIDIOC_ENUM_FRAMESIZES
2495 /* This is new in Linux 2.6.19 */
2496 /* List valid frame sizes for this format */
2497 struct v4l2_frmsizeenum frmsize;
2498 memset( &frmsize, 0, sizeof(frmsize) );
2499 frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2500 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2502 /* Not all devices support this ioctl */
2503 msg_Warn( p_obj, "Unable to query for frame sizes" );
2507 switch( frmsize.type )
2509 case V4L2_FRMSIZE_TYPE_DISCRETE:
2513 " device supports size %dx%d",
2514 frmsize.discrete.width, frmsize.discrete.height );
2516 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2518 case V4L2_FRMSIZE_TYPE_STEPWISE:
2520 " device supports sizes %dx%d to %dx%d using %dx%d increments",
2521 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2522 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2523 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2525 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2527 " device supports all sizes %dx%d to %dx%d",
2528 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2529 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2536 if( !b_codec_supported )
2539 "device codec %4s (%s) not supported",
2541 p_sys->p_codecs[i_index].description );
2547 if( i_fd >= 0 ) v4l2_close( i_fd );
2552 if( i_fd >= 0 ) v4l2_close( i_fd );
2557 static void name2var( unsigned char *name )
2559 for( ; *name; name++ )
2560 *name = (*name == ' ') ? '_' : tolower( *name );
2563 /*****************************************************************************
2564 * Print a user-class v4l2 control's details, create the relevant variable,
2565 * change the value if needed.
2566 *****************************************************************************/
2567 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2568 struct v4l2_queryctrl queryctrl,
2569 bool b_reset, bool b_demux )
2571 struct v4l2_querymenu querymenu;
2578 vlc_value_t val, val2;
2580 if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2581 msg_Dbg( p_obj, " control is busy" );
2582 if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2583 msg_Dbg( p_obj, " control is read-only" );
2585 for( i = 0; controls[i].psz_name != NULL; i++ )
2586 if( controls[i].i_cid == queryctrl.id ) break;
2588 if( controls[i].psz_name )
2590 psz_name = strdup( controls[i].psz_name );
2591 char psz_cfg_name[40];
2592 sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2593 i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2594 var_Destroy( p_obj, psz_cfg_name );
2598 psz_name = strdup( (const char *)queryctrl.name );
2599 name2var( (unsigned char *)psz_name );
2603 switch( queryctrl.type )
2605 case V4L2_CTRL_TYPE_INTEGER:
2606 msg_Dbg( p_obj, " integer control" );
2608 " valid values: %d to %d by steps of %d",
2609 queryctrl.minimum, queryctrl.maximum,
2612 var_Create( p_obj, psz_name,
2613 VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2614 | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2615 val.i_int = queryctrl.minimum;
2616 var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2617 val.i_int = queryctrl.maximum;
2618 var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2619 val.i_int = queryctrl.step;
2620 var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2622 case V4L2_CTRL_TYPE_BOOLEAN:
2623 msg_Dbg( p_obj, " boolean control" );
2624 var_Create( p_obj, psz_name,
2625 VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2627 case V4L2_CTRL_TYPE_MENU:
2628 msg_Dbg( p_obj, " menu control" );
2629 var_Create( p_obj, psz_name,
2630 VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2631 | VLC_VAR_ISCOMMAND );
2632 memset( &querymenu, 0, sizeof( querymenu ) );
2633 for( i_mid = queryctrl.minimum;
2634 i_mid <= (unsigned)queryctrl.maximum;
2637 querymenu.index = i_mid;
2638 querymenu.id = queryctrl.id;
2639 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2641 msg_Dbg( p_obj, " %d: %s",
2642 querymenu.index, querymenu.name );
2643 val.i_int = querymenu.index;
2644 val2.psz_string = (char *)querymenu.name;
2645 var_Change( p_obj, psz_name,
2646 VLC_VAR_ADDCHOICE, &val, &val2 );
2650 case V4L2_CTRL_TYPE_BUTTON:
2651 msg_Dbg( p_obj, " button control" );
2652 var_Create( p_obj, psz_name,
2653 VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2655 case V4L2_CTRL_TYPE_CTRL_CLASS:
2656 msg_Dbg( p_obj, " control class" );
2657 var_Create( p_obj, psz_name, VLC_VAR_VOID );
2660 msg_Dbg( p_obj, " unknown control type (FIXME)" );
2665 switch( queryctrl.type )
2667 case V4L2_CTRL_TYPE_INTEGER:
2668 case V4L2_CTRL_TYPE_BOOLEAN:
2669 case V4L2_CTRL_TYPE_MENU:
2671 struct v4l2_control control;
2672 msg_Dbg( p_obj, " default value: %d",
2673 queryctrl.default_value );
2674 memset( &control, 0, sizeof( control ) );
2675 control.id = queryctrl.id;
2676 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2678 msg_Dbg( p_obj, " current value: %d", control.value );
2682 i_val = control.value;
2683 if( b_reset && queryctrl.default_value != control.value )
2685 msg_Dbg( p_obj, " reset value to default" );
2686 Control( p_obj, p_sys, i_fd, psz_name,
2687 queryctrl.id, queryctrl.default_value );
2692 Control( p_obj, p_sys, i_fd, psz_name,
2693 queryctrl.id, i_val );
2701 val.psz_string = (char *)queryctrl.name;
2702 var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2703 val.i_int = queryctrl.id;
2704 val2.psz_string = (char *)psz_name;
2705 var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2706 /* bad things happen changing MPEG mid-stream
2707 * so don't add to Ext Settings GUI */
2708 if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2709 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2711 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2714 var_SetBool( p_obj, psz_name, i_val );
2716 case VLC_VAR_INTEGER:
2717 var_SetInteger( p_obj, psz_name, i_val );
2722 msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2728 var_AddCallback( p_obj, psz_name,
2729 DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2731 var_AddCallback( p_obj, psz_name,
2732 AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2737 /*****************************************************************************
2738 * List all user-class v4l2 controls, set them to the user specified
2739 * value and create the relevant variables to enable runtime changes
2740 *****************************************************************************/
2741 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2742 bool b_reset, bool b_demux )
2744 struct v4l2_queryctrl queryctrl;
2747 memset( &queryctrl, 0, sizeof( queryctrl ) );
2749 /* A list of available controls (aka the variable name) will be
2750 * stored as choices in the "allcontrols" variable. We'll thus be able
2751 * to use those to create an appropriate interface
2752 * A list of available controls that can be changed mid-stream will
2753 * be stored in the "controls" variable */
2754 var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2755 var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2757 var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2759 /* Add a control to reset all controls to their default values */
2760 vlc_value_t val, val2;
2761 var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2762 val.psz_string = _( "Reset controls to default" );
2763 var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2765 val2.psz_string = (char *)"controls-reset";
2766 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2768 var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2770 var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2772 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2773 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2775 msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2777 /* List extended controls */
2778 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2779 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2781 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2783 msg_Dbg( p_obj, "%s", queryctrl.name );
2784 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2787 switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2789 case V4L2_CTRL_CLASS_USER:
2790 msg_Dbg( p_obj, "Available control: %s (%x)",
2791 queryctrl.name, queryctrl.id );
2793 case V4L2_CTRL_CLASS_MPEG:
2794 name2var( queryctrl.name );
2795 msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2796 queryctrl.name, queryctrl.id );
2799 msg_Dbg( p_obj, "Available private control: %s (%x)",
2800 queryctrl.name, queryctrl.id );
2803 ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
2804 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2809 msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
2811 /* List public controls */
2812 for( i_cid = V4L2_CID_BASE;
2813 i_cid < V4L2_CID_LASTP1;
2816 queryctrl.id = i_cid;
2817 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2819 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2821 msg_Dbg( p_obj, "Available control: %s (%x)",
2822 queryctrl.name, queryctrl.id );
2823 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2828 /* List private controls */
2829 for( i_cid = V4L2_CID_PRIVATE_BASE;
2833 queryctrl.id = i_cid;
2834 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2836 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2838 msg_Dbg( p_obj, "Available private control: %s (%x)",
2839 queryctrl.name, queryctrl.id );
2840 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2851 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
2854 char *psz_parser = p_sys->psz_set_ctrls;
2855 vlc_value_t val, text, name;
2857 if( psz_parser == NULL )
2860 if( *psz_parser == '{' )
2863 int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
2867 msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
2871 while( *psz_parser && *psz_parser != '}' )
2873 char *psz_delim, *psz_assign;
2875 while( *psz_parser == ',' || *psz_parser == ' ' )
2878 psz_delim = strchr( psz_parser, ',' );
2879 if( psz_delim == NULL )
2880 psz_delim = strchr( psz_parser, '}' );
2881 if( psz_delim == NULL )
2882 psz_delim = psz_parser + strlen( psz_parser );
2884 psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
2885 if( psz_assign == NULL )
2887 char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
2888 msg_Err( p_obj, "%s missing '='", psz_name );
2890 psz_parser = psz_delim + 1;
2895 i < val.p_list->i_count ;//&& psz_parser < psz_assign;
2898 const char *psz_var = text.p_list->p_values[i].psz_string;
2899 int i_cid = val.p_list->p_values[i].i_int;
2900 var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
2901 const char *psz_name = name.psz_string;
2903 int i_availstrlen = strlen( psz_name );
2904 int i_parsestrlen = psz_assign - psz_parser;
2905 int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
2907 if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
2909 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
2910 strtol( ++psz_assign, &psz_parser, 0) );
2914 if( psz_parser < psz_assign )
2916 char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
2917 msg_Err( p_obj, "Control %s not available", psz_name );
2919 psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
2924 /*****************************************************************************
2925 * Reset all user-class v4l2 controls to their default value
2926 *****************************************************************************/
2927 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
2929 struct v4l2_queryctrl queryctrl;
2931 memset( &queryctrl, 0, sizeof( queryctrl ) );
2933 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2934 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2936 /* Extended control API supported */
2937 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2938 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2940 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
2941 || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
2943 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2946 struct v4l2_control control;
2947 memset( &control, 0, sizeof( control ) );
2948 control.id = queryctrl.id;
2949 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2950 && queryctrl.default_value != control.value )
2953 for( i = 0; controls[i].psz_name != NULL; i++ )
2954 if( controls[i].i_cid == queryctrl.id ) break;
2955 name2var( queryctrl.name );
2956 Control( p_obj, p_sys, i_fd,
2957 controls[i].psz_name ? : (const char *)queryctrl.name,
2958 queryctrl.id, queryctrl.default_value );
2960 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2966 /* public controls */
2967 for( i_cid = V4L2_CID_BASE;
2968 i_cid < V4L2_CID_LASTP1;
2971 queryctrl.id = i_cid;
2972 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2974 struct v4l2_control control;
2975 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2977 memset( &control, 0, sizeof( control ) );
2978 control.id = queryctrl.id;
2979 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2980 && queryctrl.default_value != control.value )
2983 for( i = 0; controls[i].psz_name != NULL; i++ )
2984 if( controls[i].i_cid == queryctrl.id ) break;
2985 name2var( queryctrl.name );
2986 Control( p_obj, p_sys, i_fd,
2987 controls[i].psz_name ? : (const char *)queryctrl.name,
2988 queryctrl.id, queryctrl.default_value );
2993 /* private controls */
2994 for( i_cid = V4L2_CID_PRIVATE_BASE;
2998 queryctrl.id = i_cid;
2999 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3001 struct v4l2_control control;
3002 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3004 memset( &control, 0, sizeof( control ) );
3005 control.id = queryctrl.id;
3006 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3007 && queryctrl.default_value != control.value )
3009 name2var( queryctrl.name );
3010 Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3011 queryctrl.id, queryctrl.default_value );
3021 /*****************************************************************************
3022 * Issue user-class v4l2 controls
3023 *****************************************************************************/
3024 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3025 const char *psz_name, int i_cid, int i_value )
3028 struct v4l2_queryctrl queryctrl;
3029 struct v4l2_control control;
3030 struct v4l2_ext_control ext_control;
3031 struct v4l2_ext_controls ext_controls;
3036 memset( &queryctrl, 0, sizeof( queryctrl ) );
3038 queryctrl.id = i_cid;
3040 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3041 || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3043 msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3044 return VLC_EGENERIC;
3047 memset( &control, 0, sizeof( control ) );
3048 memset( &ext_control, 0, sizeof( ext_control ) );
3049 memset( &ext_controls, 0, sizeof( ext_controls ) );
3051 ext_control.id = i_cid;
3052 ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3053 ext_controls.count = 1;
3054 ext_controls.controls = &ext_control;
3058 if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3060 ext_control.value = i_value;
3061 if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3063 control.value = i_value;
3064 if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3066 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3067 psz_name, i_cid, i_value );
3068 return VLC_EGENERIC;
3070 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3074 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3075 control.value = ext_control.value;
3082 msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3083 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3086 val.b_bool = control.value;
3087 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3088 var_SetVoid( p_obj, "controls-update" );
3090 case VLC_VAR_INTEGER:
3091 val.i_int = control.value;
3092 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3093 var_SetVoid( p_obj, "controls-update" );
3100 /*****************************************************************************
3101 * On the fly change settings callback
3102 *****************************************************************************/
3103 static int DemuxControlCallback( vlc_object_t *p_this,
3104 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3108 demux_t *p_demux = (demux_t*)p_this;
3109 demux_sys_t *p_sys = p_demux->p_sys;
3110 int i_cid = (long int)p_data;
3112 int i_fd = p_sys->i_fd;
3115 return VLC_EGENERIC;
3117 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3119 return VLC_EGENERIC;
3122 static int DemuxControlResetCallback( vlc_object_t *p_this,
3123 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3125 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3126 demux_t *p_demux = (demux_t*)p_this;
3127 demux_sys_t *p_sys = p_demux->p_sys;
3129 int i_fd = p_sys->i_fd;
3132 return VLC_EGENERIC;
3134 ControlReset( p_this, p_sys, i_fd );
3136 return VLC_EGENERIC;
3139 static int AccessControlCallback( vlc_object_t *p_this,
3140 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3144 access_t *p_access = (access_t *)p_this;
3145 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3146 int i_cid = (long int)p_data;
3148 int i_fd = p_sys->i_fd;
3151 return VLC_EGENERIC;
3153 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3155 return VLC_EGENERIC;
3158 static int AccessControlResetCallback( vlc_object_t *p_this,
3159 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3161 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3162 access_t *p_access = (access_t *)p_this;
3163 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3165 int i_fd = p_sys->i_fd;
3168 return VLC_EGENERIC;
3170 ControlReset( p_this, p_sys, i_fd );
3172 return VLC_EGENERIC;