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 },
431 { V4L2_PIX_FMT_JPEG, VLC_CODEC_JPEG, 0, 0, 0 },
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, V4L2_PIX_FMT_JPEG };
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 )
1092 /* Special for access_demux */
1093 case DEMUX_CAN_PAUSE:
1094 case DEMUX_CAN_SEEK:
1095 case DEMUX_SET_PAUSE_STATE:
1096 case DEMUX_CAN_CONTROL_PACE:
1097 *va_arg( args, bool * ) = false;
1100 case DEMUX_GET_PTS_DELAY:
1101 *va_arg(args,int64_t *) = (int64_t)p_demux->p_sys->i_cache*1000;
1104 case DEMUX_GET_TIME:
1105 *va_arg( args, int64_t * ) = mdate();
1108 /* TODO implement others */
1110 return VLC_EGENERIC;
1113 return VLC_EGENERIC;
1116 /*****************************************************************************
1117 * AccessControl: access callback
1118 *****************************************************************************/
1119 static int AccessControl( access_t *p_access, int i_query, va_list args )
1121 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1126 case ACCESS_CAN_SEEK:
1127 case ACCESS_CAN_FASTSEEK:
1128 case ACCESS_CAN_PAUSE:
1129 case ACCESS_CAN_CONTROL_PACE:
1130 *va_arg( args, bool* ) = false;
1134 case ACCESS_GET_PTS_DELAY:
1135 *va_arg(args,int64_t *) = (int64_t)p_sys->i_cache*1000;
1139 case ACCESS_SET_PAUSE_STATE:
1143 case ACCESS_GET_TITLE_INFO:
1144 case ACCESS_SET_TITLE:
1145 case ACCESS_SET_SEEKPOINT:
1146 case ACCESS_SET_PRIVATE_ID_STATE:
1147 case ACCESS_GET_CONTENT_TYPE:
1148 case ACCESS_GET_META:
1149 return VLC_EGENERIC;
1152 msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1153 return VLC_EGENERIC;
1159 /*****************************************************************************
1160 * AccessRead: access callback
1161 ******************************************************************************/
1162 static ssize_t AccessRead( access_t * p_access, uint8_t * p_buffer, size_t i_len )
1164 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1168 ufd.fd = p_sys->i_fd;
1169 ufd.events = POLLIN;
1171 if( p_access->info.b_eof )
1176 if( !vlc_object_alive (p_access) )
1181 while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
1185 msg_Err( p_access, "Polling error (%m)." );
1189 i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
1192 p_access->info.b_eof = true;
1194 else if( i_ret > 0 )
1196 p_access->info.i_pos += i_ret;
1202 /*****************************************************************************
1203 * Demux: Processes the audio or video frame
1204 *****************************************************************************/
1205 static int Demux( demux_t *p_demux )
1207 demux_sys_t *p_sys = p_demux->p_sys;
1210 fd.fd = p_sys->i_fd;
1211 fd.events = POLLIN|POLLPRI;
1215 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1217 if( fd.revents & (POLLIN|POLLPRI) )
1219 block_t *p_block = GrabVideo( p_demux );
1222 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1223 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1231 /*****************************************************************************
1232 * GrabVideo: Grab a video frame
1233 *****************************************************************************/
1234 static block_t* GrabVideo( demux_t *p_demux )
1236 demux_sys_t *p_sys = p_demux->p_sys;
1238 block_t *p_block = NULL;
1239 struct v4l2_buffer buf;
1242 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1244 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1246 /* Did we wait long enough ? (frame rate reduction) */
1247 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1250 /* Grab Video Frame */
1253 case IO_METHOD_READ:
1254 i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1262 /* Could ignore EIO, see spec. */
1265 msg_Err( p_demux, "Failed to read frame" );
1270 p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1271 if( !p_block ) return 0;
1275 case IO_METHOD_MMAP:
1276 memset( &buf, 0, sizeof(buf) );
1277 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1278 buf.memory = V4L2_MEMORY_MMAP;
1280 /* Wait for next frame */
1281 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1288 /* Could ignore EIO, see spec. */
1291 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1296 if( buf.index >= p_sys->i_nbuffers ) {
1297 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1301 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1302 if( !p_block ) return 0;
1305 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1307 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1308 block_Release( p_block );
1314 case IO_METHOD_USERPTR:
1315 memset( &buf, 0, sizeof(buf) );
1316 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1317 buf.memory = V4L2_MEMORY_USERPTR;
1319 /* Wait for next frame */
1320 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1327 /* Could ignore EIO, see spec. */
1330 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1337 for( i = 0; i < p_sys->i_nbuffers; i++ )
1339 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1340 buf.length == p_sys->p_buffers[i].length ) break;
1343 if( i >= p_sys->i_nbuffers )
1345 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1349 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1350 if( !p_block ) return 0;
1353 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1355 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1356 block_Release( p_block );
1365 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1370 /*****************************************************************************
1371 * ProcessVideoFrame: Helper function to take a buffer and copy it into
1373 *****************************************************************************/
1374 static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame, size_t i_size )
1378 if( !p_frame ) return 0;
1381 if( !( p_block = block_New( p_demux, i_size ) ) )
1383 msg_Warn( p_demux, "Cannot get new block" );
1388 memcpy( p_block->p_buffer, p_frame, i_size );
1393 /*****************************************************************************
1394 * Helper function to initalise video IO using the Read method
1395 *****************************************************************************/
1396 static int InitRead( demux_t *p_demux, unsigned int i_buffer_size )
1398 demux_sys_t *p_sys = p_demux->p_sys;
1400 p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1401 if( !p_sys->p_buffers )
1402 return VLC_EGENERIC;
1404 p_sys->p_buffers[0].length = i_buffer_size;
1405 p_sys->p_buffers[0].start = malloc( i_buffer_size );
1406 if( !p_sys->p_buffers[0].start )
1412 /*****************************************************************************
1413 * Helper function to initalise video IO using the mmap method
1414 *****************************************************************************/
1415 static int InitMmap( demux_t *p_demux, int i_fd )
1417 demux_sys_t *p_sys = p_demux->p_sys;
1418 struct v4l2_requestbuffers req;
1420 memset( &req, 0, sizeof(req) );
1422 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1423 req.memory = V4L2_MEMORY_MMAP;
1425 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1427 msg_Err( p_demux, "device does not support mmap i/o" );
1433 msg_Err( p_demux, "Insufficient buffer memory" );
1437 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1438 if( !p_sys->p_buffers )
1441 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1443 struct v4l2_buffer buf;
1445 memset( &buf, 0, sizeof(buf) );
1446 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1447 buf.memory = V4L2_MEMORY_MMAP;
1448 buf.index = p_sys->i_nbuffers;
1450 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1452 msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1456 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1457 p_sys->p_buffers[p_sys->i_nbuffers].start =
1458 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1460 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1462 msg_Err( p_demux, "mmap failed (%m)" );
1470 return VLC_EGENERIC;
1474 /*****************************************************************************
1475 * Helper function to initalise video IO using the userbuf method
1476 *****************************************************************************/
1477 static int InitUserP( demux_t *p_demux, int i_fd, unsigned int i_buffer_size )
1479 demux_sys_t *p_sys = p_demux->p_sys;
1480 struct v4l2_requestbuffers req;
1481 unsigned int i_page_size;
1483 i_page_size = sysconf(_SC_PAGESIZE);
1484 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1486 memset( &req, 0, sizeof(req) );
1488 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1489 req.memory = V4L2_MEMORY_USERPTR;
1491 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1493 msg_Err( p_demux, "device does not support user pointer i/o" );
1494 return VLC_EGENERIC;
1497 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1498 if( !p_sys->p_buffers )
1501 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1503 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1504 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1505 /* boundary */ i_page_size, i_buffer_size ) )
1512 free( p_sys->p_buffers );
1513 return VLC_EGENERIC;
1517 /*****************************************************************************
1518 * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1519 * in the array of supported formats returned by the driver
1520 *****************************************************************************/
1521 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1523 demux_sys_t *p_sys = p_demux->p_sys;
1525 for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1527 if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1534 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1535 uint32_t i_pixel_format,
1536 uint32_t i_width, uint32_t i_height )
1539 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1541 demux_sys_t *p_sys = p_demux->p_sys;
1543 /* This is new in Linux 2.6.19 */
1544 struct v4l2_frmivalenum frmival;
1545 memset( &frmival, 0, sizeof(frmival) );
1546 frmival.pixel_format = i_pixel_format;
1547 frmival.width = i_width;
1548 frmival.height = i_height;
1549 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1551 switch( frmival.type )
1553 case V4L2_FRMIVAL_TYPE_DISCRETE:
1555 float f_fps_max = -1;
1558 float f_fps = (float)frmival.discrete.denominator
1559 / (float)frmival.discrete.numerator;
1560 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1562 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1566 case V4L2_FRMSIZE_TYPE_STEPWISE:
1567 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1568 return __MAX( (float)frmival.stepwise.max.denominator
1569 / (float)frmival.stepwise.max.numerator,
1570 (float)frmival.stepwise.min.denominator
1571 / (float)frmival.stepwise.min.numerator );
1578 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1579 uint32_t i_pixel_format )
1581 float f_fps_max = -1.;
1582 #ifdef VIDIOC_ENUM_FRAMESIZES
1584 demux_sys_t *p_sys = p_demux->p_sys;
1586 /* This is new in Linux 2.6.19 */
1587 struct v4l2_frmsizeenum frmsize;
1588 memset( &frmsize, 0, sizeof(frmsize) );
1589 frmsize.pixel_format = i_pixel_format;
1590 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1592 switch( frmsize.type )
1594 case V4L2_FRMSIZE_TYPE_DISCRETE:
1598 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1600 frmsize.discrete.width,
1601 frmsize.discrete.height );
1602 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1603 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1606 case V4L2_FRMSIZE_TYPE_STEPWISE:
1608 uint32_t i_width = frmsize.stepwise.min_width;
1609 uint32_t i_height = frmsize.stepwise.min_height;
1611 i_width <= frmsize.stepwise.max_width &&
1612 i_height <= frmsize.stepwise.max_width;
1613 i_width += frmsize.stepwise.step_width,
1614 i_height += frmsize.stepwise.step_height )
1616 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1618 i_width, i_height );
1619 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1623 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1625 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1626 f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1628 frmsize.stepwise.max_width,
1629 frmsize.stepwise.max_height );
1637 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1638 uint32_t i_pixel_format, float f_fps_min,
1639 uint32_t *pi_width, uint32_t *pi_height )
1643 #ifdef VIDIOC_ENUM_FRAMESIZES
1645 demux_sys_t *p_sys = p_demux->p_sys;
1647 /* This is new in Linux 2.6.19 */
1648 struct v4l2_frmsizeenum frmsize;
1649 memset( &frmsize, 0, sizeof(frmsize) );
1650 frmsize.pixel_format = i_pixel_format;
1651 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1653 switch( frmsize.type )
1655 case V4L2_FRMSIZE_TYPE_DISCRETE:
1659 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1661 frmsize.discrete.width,
1662 frmsize.discrete.height );
1663 if( f_fps >= f_fps_min &&
1664 frmsize.discrete.width > *pi_width )
1666 *pi_width = frmsize.discrete.width;
1667 *pi_height = frmsize.discrete.height;
1669 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1672 case V4L2_FRMSIZE_TYPE_STEPWISE:
1674 uint32_t i_width = frmsize.stepwise.min_width;
1675 uint32_t i_height = frmsize.stepwise.min_height;
1677 i_width <= frmsize.stepwise.max_width &&
1678 i_height <= frmsize.stepwise.max_width;
1679 i_width += frmsize.stepwise.step_width,
1680 i_height += frmsize.stepwise.step_height )
1682 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1684 i_width, i_height );
1685 if( f_fps >= f_fps_min && i_width > *pi_width )
1687 *pi_width = i_width;
1688 *pi_height = i_height;
1693 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1695 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1696 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1698 frmsize.stepwise.max_width,
1699 frmsize.stepwise.max_height );
1700 if( f_fps >= f_fps_min &&
1701 frmsize.stepwise.max_width > *pi_width )
1703 *pi_width = frmsize.stepwise.max_width;
1704 *pi_height = frmsize.stepwise.max_height;
1712 /*****************************************************************************
1713 * OpenVideoDev: open and set up the video device and probe for capabilities
1714 *****************************************************************************/
1715 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1718 struct v4l2_cropcap cropcap;
1719 struct v4l2_crop crop;
1720 struct v4l2_format fmt;
1722 enum v4l2_buf_type buf_type;
1723 const char *psz_device = p_sys->psz_device;
1726 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
1728 msg_Err( p_obj, "cannot open device (%m)" );
1733 /* Note the v4l2_xxx functions are designed so that if they get passed an
1734 unknown fd, the will behave exactly as their regular xxx counterparts,
1735 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1736 custom cam format to normal formats conversion). Chances are big we will
1737 still fail then though, as normally v4l2_fd_open only fails if the
1738 device is not a v4l2 device. */
1739 if( p_sys->b_libv4l2 )
1742 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1743 if( libv4l2_fd != -1 )
1748 /* Tune the tuner */
1749 if( p_sys->i_frequency >= 0 )
1751 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1753 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1756 struct v4l2_frequency frequency;
1757 memset( &frequency, 0, sizeof( frequency ) );
1758 frequency.tuner = p_sys->i_cur_tuner;
1759 frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1760 frequency.frequency = p_sys->i_frequency / 62.5;
1761 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1763 msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1766 msg_Dbg( p_obj, "Tuner frequency set" );
1769 /* Set the tuner's audio mode */
1770 if( p_sys->i_audio_mode >= 0 )
1772 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1774 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1777 struct v4l2_tuner tuner;
1778 memset( &tuner, 0, sizeof( tuner ) );
1779 tuner.index = p_sys->i_cur_tuner;
1780 tuner.audmode = p_sys->i_audio_mode;
1781 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1783 msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1786 msg_Dbg( p_obj, "Tuner audio mode set" );
1789 /* Select standard */
1791 if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1793 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1795 msg_Err( p_obj, "cannot set standard (%m)" );
1798 msg_Dbg( p_obj, "Set standard" );
1803 if( p_sys->i_selected_input >= p_sys->i_input )
1805 msg_Warn( p_obj, "invalid input. Using the default one" );
1806 p_sys->i_selected_input = 0;
1809 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1811 msg_Err( p_obj, "cannot set input (%m)" );
1815 /* Set audio input */
1817 if( p_sys->i_audio > 0 )
1819 if( p_sys->i_selected_audio_input < 0
1820 || p_sys->i_selected_audio_input >= p_sys->i_audio )
1822 msg_Warn( p_obj, "invalid audio input. Using the default one" );
1823 p_sys->i_selected_audio_input = 0;
1826 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1828 msg_Err( p_obj, "cannot set audio input (%m)" );
1831 msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1835 /* TODO: Move the resolution stuff up here */
1836 /* if MPEG encoder card, no need to do anything else after this */
1837 ControlList( p_obj, p_sys, i_fd,
1838 var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1839 SetAvailControlsByString( p_obj, p_sys, i_fd );
1841 if( false == b_demux)
1846 demux_t *p_demux = (demux_t *) p_obj;
1848 /* Verify device support for the various IO methods */
1851 case IO_METHOD_READ:
1852 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1854 msg_Err( p_obj, "device does not support read i/o" );
1859 case IO_METHOD_MMAP:
1860 case IO_METHOD_USERPTR:
1861 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1863 msg_Err( p_obj, "device does not support streaming i/o" );
1869 msg_Err( p_obj, "io method not supported" );
1873 /* Reset Cropping */
1874 memset( &cropcap, 0, sizeof(cropcap) );
1875 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1876 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1878 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1879 crop.c = cropcap.defrect; /* reset to default */
1880 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1885 /* Cropping not supported. */
1888 /* Errors ignored. */
1894 /* Try and find default resolution if not specified */
1895 memset( &fmt, 0, sizeof(fmt) );
1896 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1898 if( p_sys->i_width == 0 || p_sys->i_height == 0 )
1900 /* Use current width and height settings */
1901 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
1903 msg_Err( p_demux, "Cannot get default width and height." );
1907 p_sys->i_width = fmt.fmt.pix.width;
1908 p_sys->i_height = fmt.fmt.pix.height;
1910 if( fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE )
1912 p_sys->i_height = p_sys->i_height * 2;
1915 else if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1917 msg_Dbg( p_demux, "will try to find optimal width and height." );
1921 /* Use user specified width and height */
1922 msg_Dbg( p_demux, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
1925 fmt.fmt.pix.width = p_sys->i_width;
1926 fmt.fmt.pix.height = p_sys->i_height;
1927 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1929 /* Test and set Chroma */
1930 fmt.fmt.pix.pixelformat = 0;
1931 if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
1933 /* User specified chroma */
1934 const vlc_fourcc_t i_requested_fourcc =
1935 vlc_fourcc_GetCodecFromString( VIDEO_ES, p_sys->psz_requested_chroma );
1937 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
1939 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
1941 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
1945 /* Try and set user chroma */
1946 if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ( fmt.fmt.pix.pixelformat && v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) )
1948 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
1949 fmt.fmt.pix.pixelformat = 0;
1953 /* If no user specified chroma, find best */
1954 /* This also decides if MPEG encoder card or not */
1955 if( !fmt.fmt.pix.pixelformat )
1958 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
1960 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
1961 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat )
1962 && v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1965 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
1967 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
1972 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1974 if( p_sys->f_fps <= 0 )
1976 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
1977 fmt.fmt.pix.pixelformat );
1978 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
1980 GetMaxDimensions( p_demux, i_fd,
1981 fmt.fmt.pix.pixelformat, p_sys->f_fps,
1982 &fmt.fmt.pix.width, &fmt.fmt.pix.height );
1983 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f of %dx%d",
1984 p_sys->f_fps, fmt.fmt.pix.width, fmt.fmt.pix.height );
1985 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) {;}
1988 /* Reassign width, height and chroma incase driver override */
1989 p_sys->i_width = fmt.fmt.pix.width;
1990 p_sys->i_height = fmt.fmt.pix.height;
1992 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
1993 /* Print extra info */
1994 msg_Dbg( p_demux, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
1995 /* Check interlacing */
1996 switch( fmt.fmt.pix.field )
1998 case V4L2_FIELD_NONE:
1999 msg_Dbg( p_demux, "Interlacing setting: progressive" );
2001 case V4L2_FIELD_TOP:
2002 msg_Dbg( p_demux, "Interlacing setting: top field only" );
2004 case V4L2_FIELD_BOTTOM:
2005 msg_Dbg( p_demux, "Interlacing setting: bottom field only" );
2007 case V4L2_FIELD_INTERLACED:
2008 msg_Dbg( p_demux, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2010 case V4L2_FIELD_SEQ_TB:
2011 msg_Dbg( p_demux, "Interlacing setting: sequential top bottom" );
2013 case V4L2_FIELD_SEQ_BT:
2014 msg_Dbg( p_demux, "Interlacing setting: sequential bottom top" );
2016 case V4L2_FIELD_ALTERNATE:
2017 msg_Dbg( p_demux, "Interlacing setting: alternate fields" );
2019 case V4L2_FIELD_INTERLACED_TB:
2020 msg_Dbg( p_demux, "Interlacing setting: interleaved top bottom" );
2022 case V4L2_FIELD_INTERLACED_BT:
2023 msg_Dbg( p_demux, "Interlacing setting: interleaved bottom top" );
2026 msg_Warn( p_demux, "Interlacing setting: unknown type (%d)",
2027 fmt.fmt.pix.field );
2030 if( fmt.fmt.pix.field != V4L2_FIELD_NONE )
2031 msg_Warn( p_demux, "Interlaced inputs haven't been tested. Please report any issue." );
2033 /* Look up final fourcc */
2034 p_sys->i_fourcc = 0;
2035 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2037 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2039 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2040 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2041 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2042 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2043 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2048 /* Buggy driver paranoia */
2049 i_min = fmt.fmt.pix.width * 2;
2050 if( fmt.fmt.pix.bytesperline < i_min )
2051 fmt.fmt.pix.bytesperline = i_min;
2052 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2053 if( fmt.fmt.pix.sizeimage < i_min )
2054 fmt.fmt.pix.sizeimage = i_min;
2056 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2057 /* This is new in Linux 2.6.19 */
2058 /* List supported frame rates */
2059 struct v4l2_frmivalenum frmival;
2060 memset( &frmival, 0, sizeof(frmival) );
2061 frmival.pixel_format = fmt.fmt.pix.pixelformat;
2062 frmival.width = p_sys->i_width;
2063 frmival.height = p_sys->i_height;
2064 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2067 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2068 vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2069 msg_Dbg( p_demux, "supported frame intervals for %4s, %dx%d:",
2070 psz_fourcc, frmival.width, frmival.height );
2071 switch( frmival.type )
2073 case V4L2_FRMIVAL_TYPE_DISCRETE:
2076 msg_Dbg( p_demux, " supported frame interval: %d/%d",
2077 frmival.discrete.numerator,
2078 frmival.discrete.denominator );
2080 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2082 case V4L2_FRMIVAL_TYPE_STEPWISE:
2083 msg_Dbg( p_demux, " supported frame intervals: %d/%d to "
2084 "%d/%d using %d/%d increments",
2085 frmival.stepwise.min.numerator,
2086 frmival.stepwise.min.denominator,
2087 frmival.stepwise.max.numerator,
2088 frmival.stepwise.max.denominator,
2089 frmival.stepwise.step.numerator,
2090 frmival.stepwise.step.denominator );
2092 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2093 msg_Dbg( p_demux, " supported frame intervals: %d/%d to %d/%d",
2094 frmival.stepwise.min.numerator,
2095 frmival.stepwise.min.denominator,
2096 frmival.stepwise.max.numerator,
2097 frmival.stepwise.max.denominator );
2104 /* Init IO method */
2107 case IO_METHOD_READ:
2108 if( InitRead( p_demux, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2111 case IO_METHOD_MMAP:
2112 if( InitMmap( p_demux, i_fd ) != VLC_SUCCESS ) goto open_failed;
2115 case IO_METHOD_USERPTR:
2116 if( InitUserP( p_demux, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2122 es_fmt.video.i_width = p_sys->i_width;
2123 es_fmt.video.i_height = p_sys->i_height;
2124 es_fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
2126 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2127 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2128 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2134 case IO_METHOD_READ:
2138 case IO_METHOD_MMAP:
2139 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2141 struct v4l2_buffer buf;
2143 memset( &buf, 0, sizeof(buf) );
2144 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2145 buf.memory = V4L2_MEMORY_MMAP;
2148 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2150 msg_Err( p_demux, "VIDIOC_QBUF failed" );
2155 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2156 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2158 msg_Err( p_demux, "VIDIOC_STREAMON failed" );
2164 case IO_METHOD_USERPTR:
2165 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2167 struct v4l2_buffer buf;
2169 memset( &buf, 0, sizeof(buf) );
2170 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2171 buf.memory = V4L2_MEMORY_USERPTR;
2173 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2174 buf.length = p_sys->p_buffers[i].length;
2176 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2178 msg_Err( p_demux, "VIDIOC_QBUF failed" );
2183 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2184 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2186 msg_Err( p_demux, "VIDIOC_STREAMON failed" );
2194 if( p_sys->f_fps >= 0.1 )
2196 msg_Dbg( p_demux, "User set fps=%f", p_sys->f_fps );
2202 if( i_fd >= 0 ) v4l2_close( i_fd );
2207 /*****************************************************************************
2208 * ProbeVideoDev: probe video for capabilities
2209 *****************************************************************************/
2210 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2211 const char *psz_device )
2218 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
2220 msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2225 /* Note the v4l2_xxx functions are designed so that if they get passed an
2226 unknown fd, the will behave exactly as their regular xxx counterparts,
2227 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2228 custom cam format to normal formats conversion). Chances are big we will
2229 still fail then though, as normally v4l2_fd_open only fails if the
2230 device is not a v4l2 device. */
2231 if( p_sys->b_libv4l2 )
2234 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2235 if( libv4l2_fd != -1 )
2240 /* Get device capabilites */
2242 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2244 msg_Err( p_obj, "cannot get video capabilities (%m)" );
2248 msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2249 p_sys->dev_cap.card,
2250 p_sys->dev_cap.driver,
2251 (p_sys->dev_cap.version >> 16) & 0xFF,
2252 (p_sys->dev_cap.version >> 8) & 0xFF,
2253 p_sys->dev_cap.version & 0xFF,
2254 p_sys->dev_cap.bus_info );
2256 msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capure, "
2259 ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
2260 ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
2261 ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' ') );
2263 msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2265 "(%c) Asynchronous",
2266 ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2267 ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2268 ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2270 /* Now, enumerate all the video inputs. This is useless at the moment
2271 since we have no way to present that info to the user except with
2274 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2276 struct v4l2_input t_input;
2277 memset( &t_input, 0, sizeof(t_input) );
2278 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2281 t_input.index = p_sys->i_input;
2284 p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2285 if( !p_sys->p_inputs ) goto open_failed;
2287 for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2289 p_sys->p_inputs[i_index].index = i_index;
2291 if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2293 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2296 msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2298 p_sys->p_inputs[i_index].name,
2299 p_sys->p_inputs[i_index].type
2300 == V4L2_INPUT_TYPE_TUNER ?
2302 "External analog input",
2303 i_index == p_sys->i_selected_input ? '*' : ' ' );
2307 /* Probe video standards */
2308 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2310 struct v4l2_standard t_standards;
2311 t_standards.index = 0;
2312 p_sys->i_standard = 0;
2313 while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2315 p_sys->i_standard++;
2316 t_standards.index = p_sys->i_standard;
2319 p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2320 if( !p_sys->p_standards ) goto open_failed;
2322 for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2324 p_sys->p_standards[i_standard].index = i_standard;
2326 if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2328 msg_Err( p_obj, "cannot get video input standards (%m)" );
2331 msg_Dbg( p_obj, "video standard %i is: %s %c",
2333 p_sys->p_standards[i_standard].name,
2334 (unsigned)i_standard == p_sys->i_selected_standard_id ? '*' : ' ' );
2338 /* initialize the structures for the ioctls */
2339 for( i_index = 0; i_index < 32; i_index++ )
2341 p_sys->p_audios[i_index].index = i_index;
2344 /* Probe audio inputs */
2345 if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2347 while( p_sys->i_audio < 32 &&
2348 v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2350 if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2352 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2356 msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2358 p_sys->p_audios[p_sys->i_audio].name,
2359 p_sys->p_audios[p_sys->i_audio].capability &
2360 V4L2_AUDCAP_STEREO ?
2362 p_sys->p_audios[p_sys->i_audio].capability &
2364 "(Automatic Volume Level supported)" : "",
2365 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2371 /* List tuner caps */
2372 if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2374 struct v4l2_tuner tuner;
2375 memset( &tuner, 0, sizeof(tuner) );
2377 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2380 memset( &tuner, 0, sizeof(tuner) );
2381 tuner.index = p_sys->i_tuner;
2384 p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2385 if( !p_sys->p_tuners ) goto open_failed;
2387 for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2389 p_sys->p_tuners[i_index].index = i_index;
2391 if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2393 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2396 msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2397 "frequency range: %.1f %s -> %.1f %s",
2399 p_sys->p_tuners[i_index].name,
2400 p_sys->p_tuners[i_index].type
2401 == V4L2_TUNER_RADIO ?
2402 "Radio" : "Analog TV",
2403 p_sys->p_tuners[i_index].rangelow * 62.5,
2404 p_sys->p_tuners[i_index].capability &
2405 V4L2_TUNER_CAP_LOW ?
2407 p_sys->p_tuners[i_index].rangehigh * 62.5,
2408 p_sys->p_tuners[i_index].capability &
2409 V4L2_TUNER_CAP_LOW ?
2412 struct v4l2_frequency frequency;
2413 memset( &frequency, 0, sizeof( frequency ) );
2414 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2416 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2419 msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2421 p_sys->p_tuners[i_index].name,
2422 frequency.frequency * 62.5,
2423 p_sys->p_tuners[i_index].capability &
2424 V4L2_TUNER_CAP_LOW ?
2429 /* Probe for available chromas */
2430 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2432 struct v4l2_fmtdesc codec;
2435 memset( &codec, 0, sizeof(codec) );
2436 codec.index = i_index;
2437 codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2439 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2442 codec.index = i_index;
2445 p_sys->i_codec = i_index;
2447 p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2449 for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2451 p_sys->p_codecs[i_index].index = i_index;
2452 p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2454 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2456 msg_Err( p_obj, "cannot get codec description (%m)" );
2460 /* only print if vlc supports the format */
2461 char psz_fourcc_v4l2[5];
2462 memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2463 vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2465 bool b_codec_supported = false;
2466 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2468 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2470 b_codec_supported = true;
2473 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2474 vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2476 msg_Dbg( p_obj, "device supports chroma %4s [%s, %s]",
2478 p_sys->p_codecs[i_index].description,
2481 #ifdef VIDIOC_ENUM_FRAMESIZES
2482 /* This is new in Linux 2.6.19 */
2483 /* List valid frame sizes for this format */
2484 struct v4l2_frmsizeenum frmsize;
2485 memset( &frmsize, 0, sizeof(frmsize) );
2486 frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2487 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2489 /* Not all devices support this ioctl */
2490 msg_Warn( p_obj, "Unable to query for frame sizes" );
2494 switch( frmsize.type )
2496 case V4L2_FRMSIZE_TYPE_DISCRETE:
2500 " device supports size %dx%d",
2501 frmsize.discrete.width, frmsize.discrete.height );
2503 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2505 case V4L2_FRMSIZE_TYPE_STEPWISE:
2507 " device supports sizes %dx%d to %dx%d using %dx%d increments",
2508 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2509 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2510 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2512 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2514 " device supports all sizes %dx%d to %dx%d",
2515 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2516 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2523 if( !b_codec_supported )
2526 "device codec %4s (%s) not supported",
2528 p_sys->p_codecs[i_index].description );
2534 if( i_fd >= 0 ) v4l2_close( i_fd );
2539 if( i_fd >= 0 ) v4l2_close( i_fd );
2544 static void name2var( unsigned char *name )
2546 for( ; *name; name++ )
2547 *name = (*name == ' ') ? '_' : tolower( *name );
2550 /*****************************************************************************
2551 * Print a user-class v4l2 control's details, create the relevant variable,
2552 * change the value if needed.
2553 *****************************************************************************/
2554 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2555 struct v4l2_queryctrl queryctrl,
2556 bool b_reset, bool b_demux )
2558 struct v4l2_querymenu querymenu;
2565 vlc_value_t val, val2;
2567 if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2568 msg_Dbg( p_obj, " control is busy" );
2569 if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2570 msg_Dbg( p_obj, " control is read-only" );
2572 for( i = 0; controls[i].psz_name != NULL; i++ )
2573 if( controls[i].i_cid == queryctrl.id ) break;
2575 if( controls[i].psz_name )
2577 psz_name = strdup( controls[i].psz_name );
2578 char psz_cfg_name[40];
2579 sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2580 i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2581 var_Destroy( p_obj, psz_cfg_name );
2585 psz_name = strdup( (const char *)queryctrl.name );
2586 name2var( (unsigned char *)psz_name );
2590 switch( queryctrl.type )
2592 case V4L2_CTRL_TYPE_INTEGER:
2593 msg_Dbg( p_obj, " integer control" );
2595 " valid values: %d to %d by steps of %d",
2596 queryctrl.minimum, queryctrl.maximum,
2599 var_Create( p_obj, psz_name,
2600 VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2601 | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2602 val.i_int = queryctrl.minimum;
2603 var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2604 val.i_int = queryctrl.maximum;
2605 var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2606 val.i_int = queryctrl.step;
2607 var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2609 case V4L2_CTRL_TYPE_BOOLEAN:
2610 msg_Dbg( p_obj, " boolean control" );
2611 var_Create( p_obj, psz_name,
2612 VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2614 case V4L2_CTRL_TYPE_MENU:
2615 msg_Dbg( p_obj, " menu control" );
2616 var_Create( p_obj, psz_name,
2617 VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2618 | VLC_VAR_ISCOMMAND );
2619 memset( &querymenu, 0, sizeof( querymenu ) );
2620 for( i_mid = queryctrl.minimum;
2621 i_mid <= (unsigned)queryctrl.maximum;
2624 querymenu.index = i_mid;
2625 querymenu.id = queryctrl.id;
2626 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2628 msg_Dbg( p_obj, " %d: %s",
2629 querymenu.index, querymenu.name );
2630 val.i_int = querymenu.index;
2631 val2.psz_string = (char *)querymenu.name;
2632 var_Change( p_obj, psz_name,
2633 VLC_VAR_ADDCHOICE, &val, &val2 );
2637 case V4L2_CTRL_TYPE_BUTTON:
2638 msg_Dbg( p_obj, " button control" );
2639 var_Create( p_obj, psz_name,
2640 VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2642 case V4L2_CTRL_TYPE_CTRL_CLASS:
2643 msg_Dbg( p_obj, " control class" );
2644 var_Create( p_obj, psz_name, VLC_VAR_VOID );
2647 msg_Dbg( p_obj, " unknown control type (FIXME)" );
2652 switch( queryctrl.type )
2654 case V4L2_CTRL_TYPE_INTEGER:
2655 case V4L2_CTRL_TYPE_BOOLEAN:
2656 case V4L2_CTRL_TYPE_MENU:
2658 struct v4l2_control control;
2659 msg_Dbg( p_obj, " default value: %d",
2660 queryctrl.default_value );
2661 memset( &control, 0, sizeof( control ) );
2662 control.id = queryctrl.id;
2663 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2665 msg_Dbg( p_obj, " current value: %d", control.value );
2669 i_val = control.value;
2670 if( b_reset && queryctrl.default_value != control.value )
2672 msg_Dbg( p_obj, " reset value to default" );
2673 Control( p_obj, p_sys, i_fd, psz_name,
2674 queryctrl.id, queryctrl.default_value );
2679 Control( p_obj, p_sys, i_fd, psz_name,
2680 queryctrl.id, i_val );
2688 val.psz_string = (char *)queryctrl.name;
2689 var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2690 val.i_int = queryctrl.id;
2691 val2.psz_string = (char *)psz_name;
2692 var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2693 /* bad things happen changing MPEG mid-stream
2694 * so don't add to Ext Settings GUI */
2695 if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2696 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2698 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2701 var_SetBool( p_obj, psz_name, i_val );
2703 case VLC_VAR_INTEGER:
2704 var_SetInteger( p_obj, psz_name, i_val );
2709 msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2715 var_AddCallback( p_obj, psz_name,
2716 DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2718 var_AddCallback( p_obj, psz_name,
2719 AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2724 /*****************************************************************************
2725 * List all user-class v4l2 controls, set them to the user specified
2726 * value and create the relevant variables to enable runtime changes
2727 *****************************************************************************/
2728 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2729 bool b_reset, bool b_demux )
2731 struct v4l2_queryctrl queryctrl;
2734 memset( &queryctrl, 0, sizeof( queryctrl ) );
2736 /* A list of available controls (aka the variable name) will be
2737 * stored as choices in the "allcontrols" variable. We'll thus be able
2738 * to use those to create an appropriate interface
2739 * A list of available controls that can be changed mid-stream will
2740 * be stored in the "controls" variable */
2741 var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2742 var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2744 var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2746 /* Add a control to reset all controls to their default values */
2747 vlc_value_t val, val2;
2748 var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2749 val.psz_string = _( "Reset controls to default" );
2750 var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2752 val2.psz_string = (char *)"controls-reset";
2753 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2755 var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2757 var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2759 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2760 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2762 msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2764 /* List extended controls */
2765 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2766 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2768 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2770 msg_Dbg( p_obj, "%s", queryctrl.name );
2771 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2774 switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2776 case V4L2_CTRL_CLASS_USER:
2777 msg_Dbg( p_obj, "Available control: %s (%x)",
2778 queryctrl.name, queryctrl.id );
2780 case V4L2_CTRL_CLASS_MPEG:
2781 name2var( queryctrl.name );
2782 msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2783 queryctrl.name, queryctrl.id );
2786 msg_Dbg( p_obj, "Available private control: %s (%x)",
2787 queryctrl.name, queryctrl.id );
2790 ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
2791 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2796 msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
2798 /* List public controls */
2799 for( i_cid = V4L2_CID_BASE;
2800 i_cid < V4L2_CID_LASTP1;
2803 queryctrl.id = i_cid;
2804 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2806 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2808 msg_Dbg( p_obj, "Available control: %s (%x)",
2809 queryctrl.name, queryctrl.id );
2810 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2815 /* List private controls */
2816 for( i_cid = V4L2_CID_PRIVATE_BASE;
2820 queryctrl.id = i_cid;
2821 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2823 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2825 msg_Dbg( p_obj, "Available private control: %s (%x)",
2826 queryctrl.name, queryctrl.id );
2827 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2838 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
2841 char *psz_parser = p_sys->psz_set_ctrls;
2842 vlc_value_t val, text, name;
2844 if( psz_parser == NULL )
2847 if( *psz_parser == '{' )
2850 int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
2854 msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
2858 while( *psz_parser && *psz_parser != '}' )
2860 char *psz_delim, *psz_assign;
2862 while( *psz_parser == ',' || *psz_parser == ' ' )
2865 psz_delim = strchr( psz_parser, ',' );
2866 if( psz_delim == NULL )
2867 psz_delim = strchr( psz_parser, '}' );
2868 if( psz_delim == NULL )
2869 psz_delim = psz_parser + strlen( psz_parser );
2871 psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
2872 if( psz_assign == NULL )
2874 char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
2875 msg_Err( p_obj, "%s missing '='", psz_name );
2877 psz_parser = psz_delim + 1;
2882 i < val.p_list->i_count ;//&& psz_parser < psz_assign;
2885 const char *psz_var = text.p_list->p_values[i].psz_string;
2886 int i_cid = val.p_list->p_values[i].i_int;
2887 var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
2888 const char *psz_name = name.psz_string;
2890 int i_availstrlen = strlen( psz_name );
2891 int i_parsestrlen = psz_assign - psz_parser;
2892 int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
2894 if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
2896 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
2897 strtol( ++psz_assign, &psz_parser, 0) );
2899 free( name.psz_string );
2902 if( psz_parser < psz_assign )
2904 char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
2905 msg_Err( p_obj, "Control %s not available", psz_name );
2907 psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
2910 var_FreeList( &val, &text );
2913 /*****************************************************************************
2914 * Reset all user-class v4l2 controls to their default value
2915 *****************************************************************************/
2916 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
2918 struct v4l2_queryctrl queryctrl;
2920 memset( &queryctrl, 0, sizeof( queryctrl ) );
2922 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2923 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2925 /* Extended control API supported */
2926 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2927 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2929 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
2930 || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
2932 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2935 struct v4l2_control control;
2936 memset( &control, 0, sizeof( control ) );
2937 control.id = queryctrl.id;
2938 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2939 && queryctrl.default_value != control.value )
2942 for( i = 0; controls[i].psz_name != NULL; i++ )
2943 if( controls[i].i_cid == queryctrl.id ) break;
2944 name2var( queryctrl.name );
2945 Control( p_obj, p_sys, i_fd,
2946 controls[i].psz_name ? controls[i].psz_name
2947 : (const char *)queryctrl.name,
2948 queryctrl.id, queryctrl.default_value );
2950 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2956 /* public controls */
2957 for( i_cid = V4L2_CID_BASE;
2958 i_cid < V4L2_CID_LASTP1;
2961 queryctrl.id = i_cid;
2962 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2964 struct v4l2_control control;
2965 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2967 memset( &control, 0, sizeof( control ) );
2968 control.id = queryctrl.id;
2969 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2970 && queryctrl.default_value != control.value )
2973 for( i = 0; controls[i].psz_name != NULL; i++ )
2974 if( controls[i].i_cid == queryctrl.id ) break;
2975 name2var( queryctrl.name );
2976 Control( p_obj, p_sys, i_fd,
2977 controls[i].psz_name ? controls[i].psz_name
2978 : (const char *)queryctrl.name,
2979 queryctrl.id, queryctrl.default_value );
2984 /* private controls */
2985 for( i_cid = V4L2_CID_PRIVATE_BASE;
2989 queryctrl.id = i_cid;
2990 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2992 struct v4l2_control control;
2993 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2995 memset( &control, 0, sizeof( control ) );
2996 control.id = queryctrl.id;
2997 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2998 && queryctrl.default_value != control.value )
3000 name2var( queryctrl.name );
3001 Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3002 queryctrl.id, queryctrl.default_value );
3012 /*****************************************************************************
3013 * Issue user-class v4l2 controls
3014 *****************************************************************************/
3015 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3016 const char *psz_name, int i_cid, int i_value )
3019 struct v4l2_queryctrl queryctrl;
3020 struct v4l2_control control;
3021 struct v4l2_ext_control ext_control;
3022 struct v4l2_ext_controls ext_controls;
3027 memset( &queryctrl, 0, sizeof( queryctrl ) );
3029 queryctrl.id = i_cid;
3031 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3032 || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3034 msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3035 return VLC_EGENERIC;
3038 memset( &control, 0, sizeof( control ) );
3039 memset( &ext_control, 0, sizeof( ext_control ) );
3040 memset( &ext_controls, 0, sizeof( ext_controls ) );
3042 ext_control.id = i_cid;
3043 ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3044 ext_controls.count = 1;
3045 ext_controls.controls = &ext_control;
3049 if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3051 ext_control.value = i_value;
3052 if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3054 control.value = i_value;
3055 if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3057 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3058 psz_name, i_cid, i_value );
3059 return VLC_EGENERIC;
3061 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3065 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3066 control.value = ext_control.value;
3073 msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3074 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3077 val.b_bool = control.value;
3078 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3079 var_SetVoid( p_obj, "controls-update" );
3081 case VLC_VAR_INTEGER:
3082 val.i_int = control.value;
3083 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3084 var_SetVoid( p_obj, "controls-update" );
3091 /*****************************************************************************
3092 * On the fly change settings callback
3093 *****************************************************************************/
3094 static int DemuxControlCallback( vlc_object_t *p_this,
3095 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3099 demux_t *p_demux = (demux_t*)p_this;
3100 demux_sys_t *p_sys = p_demux->p_sys;
3101 int i_cid = (long int)p_data;
3103 int i_fd = p_sys->i_fd;
3106 return VLC_EGENERIC;
3108 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3110 return VLC_EGENERIC;
3113 static int DemuxControlResetCallback( vlc_object_t *p_this,
3114 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3116 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3117 demux_t *p_demux = (demux_t*)p_this;
3118 demux_sys_t *p_sys = p_demux->p_sys;
3120 int i_fd = p_sys->i_fd;
3123 return VLC_EGENERIC;
3125 ControlReset( p_this, p_sys, i_fd );
3127 return VLC_EGENERIC;
3130 static int AccessControlCallback( vlc_object_t *p_this,
3131 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3135 access_t *p_access = (access_t *)p_this;
3136 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3137 int i_cid = (long int)p_data;
3139 int i_fd = p_sys->i_fd;
3142 return VLC_EGENERIC;
3144 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3146 return VLC_EGENERIC;
3149 static int AccessControlResetCallback( vlc_object_t *p_this,
3150 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3152 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3153 access_t *p_access = (access_t *)p_this;
3154 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3156 int i_fd = p_sys->i_fd;
3159 return VLC_EGENERIC;
3161 ControlReset( p_this, p_sys, i_fd );
3163 return VLC_EGENERIC;