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." )
206 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
207 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
215 static const int i_standards_list[] =
216 { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC };
217 static const char *const psz_standards_list_text[] =
218 { N_("Default"), N_("SECAM"), N_("PAL"), N_("NTSC") };
220 static const int i_iomethod_list[] =
221 { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
222 static const char *const psz_iomethod_list_text[] =
223 { N_("READ"), N_("MMAP"), N_("USERPTR") };
225 static const int i_tuner_audio_modes_list[] =
226 { V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
227 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
228 V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
229 static const char *const psz_tuner_audio_modes_list_text[] =
232 N_( "Primary language (Analog TV tuners only)" ),
233 N_( "Secondary language (Analog TV tuners only)" ),
234 N_( "Second audio program (Analog TV tuners only)" ),
235 N_( "Primary language left, Secondary language right" ) };
237 #define V4L2_DEFAULT "/dev/video0"
238 #define CFG_PREFIX "v4l2-"
241 set_shortname( N_("Video4Linux2") )
242 set_description( N_("Video4Linux2 input") )
243 set_category( CAT_INPUT )
244 set_subcategory( SUBCAT_INPUT_ACCESS )
246 set_section( N_( "Video input" ), NULL )
247 add_integer( CFG_PREFIX "standard", 0, NULL, STANDARD_TEXT,
248 STANDARD_LONGTEXT, false )
249 change_integer_list( i_standards_list, psz_standards_list_text, NULL )
250 add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
252 add_integer( CFG_PREFIX "input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
254 add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
255 AUDIO_INPUT_LONGTEXT, true )
256 add_integer( CFG_PREFIX "io", IO_METHOD_MMAP, NULL, IOMETHOD_TEXT,
257 IOMETHOD_LONGTEXT, true )
258 change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL )
259 add_integer( CFG_PREFIX "width", -1, NULL, WIDTH_TEXT,
260 WIDTH_LONGTEXT, true )
261 add_integer( CFG_PREFIX "height", -1, NULL, HEIGHT_TEXT,
262 HEIGHT_LONGTEXT, true )
263 add_string( CFG_PREFIX "aspect-ratio", "4:3", NULL, ASPECT_TEXT,
264 ASPECT_LONGTEXT, true )
265 add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
266 add_integer( CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL,
267 CACHING_TEXT, CACHING_LONGTEXT, true )
269 add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
272 set_section( N_( "Tuner" ), NULL )
273 add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
275 add_integer( CFG_PREFIX "tuner-frequency", -1, NULL, FREQUENCY_TEXT,
276 FREQUENCY_LONGTEXT, true )
277 add_integer( CFG_PREFIX "tuner-audio-mode", -1, NULL, TUNER_AUDIO_MODE_TEXT,
278 TUNER_AUDIO_MODE_LONGTEXT, true )
279 change_integer_list( i_tuner_audio_modes_list,
280 psz_tuner_audio_modes_list_text, 0 )
282 set_section( N_( "Controls" ),
283 N_( "v4l2 driver controls, if supported by your v4l2 driver." ) )
284 add_bool( CFG_PREFIX "controls-reset", false, NULL, CTRL_RESET_TEXT,
285 CTRL_RESET_LONGTEXT, true )
286 add_integer( CFG_PREFIX "brightness", -1, NULL, BRIGHTNESS_TEXT,
287 BRIGHTNESS_LONGTEXT, true )
288 add_integer( CFG_PREFIX "contrast", -1, NULL, CONTRAST_TEXT,
289 CONTRAST_LONGTEXT, true )
290 add_integer( CFG_PREFIX "saturation", -1, NULL, SATURATION_TEXT,
291 SATURATION_LONGTEXT, true )
292 add_integer( CFG_PREFIX "hue", -1, NULL, HUE_TEXT,
294 add_integer( CFG_PREFIX "black-level", -1, NULL, BLACKLEVEL_TEXT,
295 BLACKLEVEL_LONGTEXT, true )
296 add_integer( CFG_PREFIX "auto-white-balance", -1, NULL,
297 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
298 add_integer( CFG_PREFIX "do-white-balance", -1, NULL, DOWHITEBALANCE_TEXT,
299 DOWHITEBALANCE_LONGTEXT, true )
300 add_integer( CFG_PREFIX "red-balance", -1, NULL, REDBALANCE_TEXT,
301 REDBALANCE_LONGTEXT, true )
302 add_integer( CFG_PREFIX "blue-balance", -1, NULL, BLUEBALANCE_TEXT,
303 BLUEBALANCE_LONGTEXT, true )
304 add_integer( CFG_PREFIX "gamma", -1, NULL, GAMMA_TEXT,
305 GAMMA_LONGTEXT, true )
306 add_integer( CFG_PREFIX "exposure", -1, NULL, EXPOSURE_TEXT,
307 EXPOSURE_LONGTEXT, true )
308 add_integer( CFG_PREFIX "autogain", -1, NULL, AUTOGAIN_TEXT,
309 AUTOGAIN_LONGTEXT, true )
310 add_integer( CFG_PREFIX "gain", -1, NULL, GAIN_TEXT,
311 GAIN_LONGTEXT, true )
312 add_integer( CFG_PREFIX "hflip", -1, NULL, HFLIP_TEXT,
313 HFLIP_LONGTEXT, true )
314 add_integer( CFG_PREFIX "vflip", -1, NULL, VFLIP_TEXT,
315 VFLIP_LONGTEXT, true )
316 add_integer( CFG_PREFIX "hcenter", -1, NULL, HCENTER_TEXT,
317 HCENTER_LONGTEXT, true )
318 add_integer( CFG_PREFIX "vcenter", -1, NULL, VCENTER_TEXT,
319 VCENTER_LONGTEXT, true )
320 add_integer( CFG_PREFIX "audio-volume", -1, NULL, AUDIO_VOLUME_TEXT,
321 AUDIO_VOLUME_LONGTEXT, true )
322 add_integer( CFG_PREFIX "audio-balance", -1, NULL, AUDIO_BALANCE_TEXT,
323 AUDIO_BALANCE_LONGTEXT, true )
324 add_bool( CFG_PREFIX "audio-mute", false, NULL, AUDIO_MUTE_TEXT,
325 AUDIO_MUTE_LONGTEXT, true )
326 add_integer( CFG_PREFIX "audio-bass", -1, NULL, AUDIO_BASS_TEXT,
327 AUDIO_BASS_LONGTEXT, true )
328 add_integer( CFG_PREFIX "audio-treble", -1, NULL, AUDIO_TREBLE_TEXT,
329 AUDIO_TREBLE_LONGTEXT, true )
330 add_integer( CFG_PREFIX "audio-loudness", -1, NULL, AUDIO_LOUDNESS_TEXT,
331 AUDIO_LOUDNESS_LONGTEXT, true )
332 add_string( CFG_PREFIX "set-ctrls", NULL, NULL, S_CTRLS_TEXT,
333 S_CTRLS_LONGTEXT, true )
335 add_obsolete_string( CFG_PREFIX "dev" )
337 add_obsolete_string( CFG_PREFIX "adev" )
338 add_obsolete_integer( CFG_PREFIX "audio-method" )
339 add_obsolete_bool( CFG_PREFIX "stereo" )
340 add_obsolete_integer( CFG_PREFIX "samplerate" )
342 add_shortcut( "v4l2" )
343 set_capability( "access_demux", 10 )
344 set_callbacks( DemuxOpen, DemuxClose )
347 add_shortcut( "v4l2" )
348 add_shortcut( "v4l2c" )
349 set_description( N_("Video4Linux2 Compressed A/V") )
350 set_capability( "access", 0 )
351 /* use these when open as access_demux fails; VLC will use another demux */
352 set_callbacks( AccessOpen, AccessClose )
356 /*****************************************************************************
357 * Access: local prototypes
358 *****************************************************************************/
360 static void CommonClose( vlc_object_t *, demux_sys_t * );
361 static void ParseMRL( demux_sys_t *, char *, vlc_object_t * );
362 static void GetV4L2Params( demux_sys_t *, vlc_object_t * );
363 static void SetAvailControlsByString( vlc_object_t *, demux_sys_t *, int );
365 static int DemuxControl( demux_t *, int, va_list );
366 static int AccessControl( access_t *, int, va_list );
368 static int Demux( demux_t * );
369 static block_t *AccessRead( access_t * );
371 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys );
372 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
374 static bool IsPixelFormatSupported( demux_t *p_demux,
375 unsigned int i_pixelformat );
377 static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
378 static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
379 const char *psz_device );
381 static int ControlList( vlc_object_t *, demux_sys_t *, int , bool, bool );
382 static int Control( vlc_object_t *, demux_sys_t *, int i_fd,
383 const char *psz_name, int i_cid, int i_value );
385 static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
386 vlc_value_t oldval, vlc_value_t newval,
388 static int DemuxControlResetCallback( vlc_object_t *p_this, const char *psz_var,
389 vlc_value_t oldval, vlc_value_t newval,
391 static int AccessControlCallback( vlc_object_t *p_this, const char *psz_var,
392 vlc_value_t oldval, vlc_value_t newval,
394 static int AccessControlResetCallback( vlc_object_t *p_this,
395 const char *psz_var, vlc_value_t oldval,
396 vlc_value_t newval, void *p_data );
401 vlc_fourcc_t i_fourcc;
405 } v4l2chroma_to_fourcc[] =
408 { V4L2_PIX_FMT_GREY, VLC_CODEC_GREY, 0, 0, 0 },
409 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
410 { V4L2_PIX_FMT_RGB555, VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
411 { V4L2_PIX_FMT_RGB565, VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
412 /* Won't work since we don't know how to handle such gmask values
414 { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
415 { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
417 { V4L2_PIX_FMT_BGR24, VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
418 { V4L2_PIX_FMT_RGB24, VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
419 { V4L2_PIX_FMT_BGR32, VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
420 { V4L2_PIX_FMT_RGB32, VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
421 { V4L2_PIX_FMT_YUYV, VLC_CODEC_YUYV, 0, 0, 0 },
422 { V4L2_PIX_FMT_UYVY, VLC_CODEC_UYVY, 0, 0, 0 },
423 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
424 { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
425 { V4L2_PIX_FMT_YVU420, VLC_CODEC_YV12, 0, 0, 0 },
426 { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
427 { V4L2_PIX_FMT_YUV410, VLC_CODEC_I410, 0, 0, 0 },
429 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
431 { V4L2_PIX_FMT_YUV420, VLC_CODEC_I420, 0, 0, 0 },
432 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_CODEC_RGB32 }, */
434 /* Compressed data types */
435 { V4L2_PIX_FMT_MJPEG, VLC_CODEC_MJPG, 0, 0, 0 },
436 { V4L2_PIX_FMT_JPEG, VLC_CODEC_JPEG, 0, 0, 0 },
438 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
439 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
445 * List of V4L2 chromas were confident enough to use as fallbacks if the
446 * user hasn't provided a --v4l2-chroma value.
448 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
450 static const __u32 p_chroma_fallbacks[] =
451 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
452 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
453 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
457 const char *psz_name;
461 { "brightness", V4L2_CID_BRIGHTNESS },
462 { "contrast", V4L2_CID_CONTRAST },
463 { "saturation", V4L2_CID_SATURATION },
464 { "hue", V4L2_CID_HUE },
465 { "audio-volume", V4L2_CID_AUDIO_VOLUME },
466 { "audio-balance", V4L2_CID_AUDIO_BALANCE },
467 { "audio-bass", V4L2_CID_AUDIO_BASS },
468 { "audio-treble", V4L2_CID_AUDIO_TREBLE },
469 { "audio-mute", V4L2_CID_AUDIO_MUTE },
470 { "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
471 { "black-level", V4L2_CID_BLACK_LEVEL },
472 { "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
473 { "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
474 { "red-balance", V4L2_CID_RED_BALANCE },
475 { "blue-balance", V4L2_CID_BLUE_BALANCE },
476 { "gamma", V4L2_CID_GAMMA },
477 { "exposure", V4L2_CID_EXPOSURE },
478 { "autogain", V4L2_CID_AUTOGAIN },
479 { "gain", V4L2_CID_GAIN },
480 { "hflip", V4L2_CID_HFLIP },
481 { "vflip", V4L2_CID_VFLIP },
482 { "hcenter", V4L2_CID_HCENTER },
483 { "vcenter", V4L2_CID_VCENTER },
495 char *psz_device; /* Main device from MRL */
498 char *psz_requested_chroma;
505 struct v4l2_capability dev_cap;
508 struct v4l2_input *p_inputs;
509 int i_selected_input;
512 struct v4l2_standard *p_standards;
513 v4l2_std_id i_selected_standard_id;
516 /* V4L2 devices cannot have more than 32 audio inputs */
517 struct v4l2_audio p_audios[32];
518 int i_selected_audio_input;
521 struct v4l2_tuner *p_tuners;
524 struct v4l2_fmtdesc *p_codecs;
526 struct buffer_t *p_buffers;
527 unsigned int i_nbuffers;
531 unsigned int i_aspect;
532 float f_fps; /* <= 0.0 mean to grab at full rate */
533 mtime_t i_video_pts; /* only used when f_fps > 0 */
549 int (*pf_close)( int );
550 int (*pf_dup)( int );
551 int (*pf_ioctl)( int, unsigned long int, ... );
552 ssize_t (*pf_read)( int, void *, size_t );
553 void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
554 int (*pf_munmap)( void *, size_t );
560 static void use_kernel_v4l2( demux_sys_t *p_sys )
562 p_sys->pf_close = close;
564 p_sys->pf_ioctl = ioctl;
565 p_sys->pf_read = read;
566 p_sys->pf_mmap = mmap;
567 p_sys->pf_munmap = munmap;
568 p_sys->b_libv4l2 = false;
571 static void use_libv4l2( demux_sys_t *p_sys )
573 p_sys->pf_close = v4l2_close;
574 p_sys->pf_dup = v4l2_dup;
575 p_sys->pf_ioctl = v4l2_ioctl;
576 p_sys->pf_read = v4l2_read;
577 p_sys->pf_mmap = v4l2_mmap;
578 p_sys->pf_munmap = v4l2_munmap;
579 p_sys->b_libv4l2 = true;
582 # define v4l2_close (p_sys->pf_close)
583 # define v4l2_dup (p_sys->pf_dup)
584 # define v4l2_ioctl (p_sys->pf_ioctl)
585 # define v4l2_read (p_sys->pf_read)
586 # define v4l2_mmap (p_sys->pf_mmap)
587 # define v4l2_munmap (p_sys->pf_munmap)
589 # define v4l2_close close
590 # define v4l2_dup dup
591 # define v4l2_ioctl ioctl
592 # define v4l2_read read
593 # define v4l2_mmap mmap
594 # define v4l2_munmap munmap
597 static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
600 /* TODO: if using default device, loop through all /dev/video* until
602 msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
603 if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
605 msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
606 p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
609 if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
613 /*****************************************************************************
614 * DemuxOpen: opens v4l2 device, access_demux callback
615 *****************************************************************************
617 * url: <video device>::::
619 *****************************************************************************/
620 static int DemuxOpen( vlc_object_t *p_this )
622 demux_t *p_demux = (demux_t*)p_this;
625 /* Only when selected */
626 if( strcmp( p_demux->psz_access, "v4l2" ) )
630 p_demux->pf_control = DemuxControl;
631 p_demux->pf_demux = Demux;
632 p_demux->info.i_update = 0;
633 p_demux->info.i_title = 0;
634 p_demux->info.i_seekpoint = 0;
636 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
637 if( p_sys == NULL ) return VLC_ENOMEM;
639 GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
641 ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
644 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
646 msg_Dbg( p_this, "Trying direct kernel v4l2" );
647 use_kernel_v4l2( p_sys );
648 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
652 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
653 use_libv4l2( p_sys );
655 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
658 DemuxClose( p_this );
662 /*****************************************************************************
663 * GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
664 *****************************************************************************/
665 static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
667 p_sys->i_video_pts = -1;
669 p_sys->i_selected_standard_id =
670 i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
672 p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
673 p_sys->i_selected_audio_input =
674 var_CreateGetInteger( p_obj, "v4l2-audio-input" );
676 p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
678 p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
679 p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
681 var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
683 p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
684 p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
686 p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
688 p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
689 p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
690 p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
692 p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
694 char *psz_aspect = var_CreateGetString( p_obj, "v4l2-aspect-ratio" );
695 if( psz_aspect && *psz_aspect && strchr( psz_aspect, ":" ) )
697 char psz_delim = strchr( psz_aspect, ":" );
698 p_sys->i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR / atoi( psz_delim + 1 );
702 p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3 ;
707 p_sys->psz_device = NULL;
713 /*****************************************************************************
714 * ParseMRL: parse the options contained in the MRL
715 *****************************************************************************/
716 static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
718 char *psz_dup = strdup( psz_path );
719 char *psz_parser = psz_dup;
721 while( *psz_parser && *psz_parser != ':' )
726 if( *psz_parser == ':' )
731 *psz_parser++ = '\0';
733 if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
735 psz_parser += strlen( "standard=" );
736 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
738 p_sys->i_selected_standard_id = V4L2_STD_PAL;
739 psz_parser += strlen( "pal" );
741 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
743 p_sys->i_selected_standard_id = V4L2_STD_NTSC;
744 psz_parser += strlen( "ntsc" );
746 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
748 p_sys->i_selected_standard_id = V4L2_STD_SECAM;
749 psz_parser += strlen( "secam" );
751 else if( !strncmp( psz_parser, "default", strlen( "default" ) ) )
753 p_sys->i_selected_standard_id = V4L2_STD_UNKNOWN;
754 psz_parser += strlen( "default" );
758 p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
761 else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
765 psz_parser += strlen( "chroma=" );
766 if( strchr( psz_parser, ':' ) )
768 i_len = strchr( psz_parser, ':' ) - psz_parser;
772 i_len = strlen( psz_parser );
775 free( p_sys->psz_requested_chroma );
776 p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
780 else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
782 p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
785 else if( !strncmp( psz_parser, "audio-input=", strlen( "audio-input=" ) ) )
787 p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-input=" ),
790 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
792 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
795 else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
797 psz_parser += strlen( "io=" );
798 if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
800 p_sys->io = IO_METHOD_READ;
801 psz_parser += strlen( "read" );
803 else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
805 p_sys->io = IO_METHOD_MMAP;
806 psz_parser += strlen( "mmap" );
808 else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
810 p_sys->io = IO_METHOD_USERPTR;
811 psz_parser += strlen( "userptr" );
815 p_sys->io = strtol( psz_parser, &psz_parser, 0 );
818 else if( !strncmp( psz_parser, "width=",
819 strlen( "width=" ) ) )
822 strtol( psz_parser + strlen( "width=" ),
825 else if( !strncmp( psz_parser, "height=",
826 strlen( "height=" ) ) )
829 strtol( psz_parser + strlen( "height=" ),
832 else if( !strncmp( psz_parser, "aspect-ratio=",
833 strlen( "aspect-ratio=" ) ) )
835 unsigned int num,den;
836 num = strtol( psz_parser + strlen( "aspect-ratio=" ),
838 den = strtol( psz_parser + strlen( ":" ),
841 p_sys->i_aspect = num * VOUT_ASPECT_FACTOR / den;
843 else if( !strncmp( psz_parser, "controls-reset",
844 strlen( "controls-reset" ) ) )
846 var_SetBool( p_obj, "v4l2-controls-reset", true );
847 psz_parser += strlen( "controls-reset" );
850 else if( !strncmp( psz_parser, "brightness=",
851 strlen( "brightness=" ) ) )
853 var_SetInteger( p_obj, "brightness",
854 strtol( psz_parser + strlen( "brightness=" ),
857 else if( !strncmp( psz_parser, "contrast=",
858 strlen( "contrast=" ) ) )
860 var_SetInteger( p_obj, "contrast",
861 strtol( psz_parser + strlen( "contrast=" ),
864 else if( !strncmp( psz_parser, "saturation=",
865 strlen( "saturation=" ) ) )
867 var_SetInteger( p_obj, "saturation",
868 strtol( psz_parser + strlen( "saturation=" ),
871 else if( !strncmp( psz_parser, "hue=",
874 var_SetInteger( p_obj, "hue",
875 strtol( psz_parser + strlen( "hue=" ),
878 else if( !strncmp( psz_parser, "gamma=",
879 strlen( "gamma=" ) ) )
881 var_SetInteger( p_obj, "gamma",
882 strtol( psz_parser + strlen( "gamma=" ),
886 else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
888 p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
891 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
893 p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
896 else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
898 p_sys->i_frequency = strtol( psz_parser
899 + strlen( "tuner-frequency=" ),
902 else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
904 p_sys->i_audio_mode = strtol( psz_parser
905 + strlen( "tuner-audio-mode=" ),
908 else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
912 psz_parser += strlen( "set-ctrls=" );
913 if( strchr( psz_parser, ':' ) )
915 i_len = strchr( psz_parser, ':' ) - psz_parser;
919 i_len = strlen( psz_parser );
922 p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
926 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
927 || !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
928 || !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
929 || !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
930 || !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
932 if( strchr( psz_parser, ':' ) )
934 psz_parser = strchr( psz_parser, ':' );
938 psz_parser += strlen( psz_parser );
941 msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
945 char *psz_unk = strchr( psz_parser, ':' );
947 psz_unk = strndup( psz_parser, psz_unk - psz_parser );
949 psz_unk = strdup( psz_parser);
950 msg_Warn( p_obj, "unknown option %s", psz_unk );
954 while( *psz_parser && *psz_parser != ':' )
959 if( *psz_parser == '\0' )
968 p_sys->psz_device = strdup( psz_dup );
970 p_sys->psz_device = strdup( V4L2_DEFAULT );
974 /*****************************************************************************
975 * Close: close device, free resources
976 *****************************************************************************/
977 static void AccessClose( vlc_object_t *p_this )
979 access_t *p_access = (access_t *)p_this;
980 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
982 CommonClose( p_this, p_sys );
985 static void DemuxClose( vlc_object_t *p_this )
987 struct v4l2_buffer buf;
988 enum v4l2_buf_type buf_type;
991 demux_t *p_demux = (demux_t *)p_this;
992 demux_sys_t *p_sys = p_demux->p_sys;
994 /* Stop video capture */
995 if( p_sys->i_fd >= 0 )
1003 case IO_METHOD_MMAP:
1004 case IO_METHOD_USERPTR:
1005 /* Some drivers 'hang' internally if this is not done before streamoff */
1006 for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
1008 memset( &buf, 0, sizeof(buf) );
1009 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1010 buf.memory = ( p_sys->io == IO_METHOD_USERPTR ) ?
1011 V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
1012 v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
1015 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1016 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
1017 msg_Err( p_this, "VIDIOC_STREAMOFF failed" );
1024 /* Free Video Buffers */
1025 if( p_sys->p_buffers ) {
1028 case IO_METHOD_READ:
1029 free( p_sys->p_buffers[0].start );
1032 case IO_METHOD_MMAP:
1033 for( i = 0; i < p_sys->i_nbuffers; ++i )
1035 if( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
1037 msg_Err( p_this, "munmap failed" );
1042 case IO_METHOD_USERPTR:
1043 for( i = 0; i < p_sys->i_nbuffers; ++i )
1045 free( p_sys->p_buffers[i].start );
1049 free( p_sys->p_buffers );
1052 CommonClose( p_this, p_sys );
1055 static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
1059 if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
1060 free( p_sys->psz_device );
1061 free( p_sys->p_standards );
1062 free( p_sys->p_inputs );
1063 free( p_sys->p_tuners );
1064 free( p_sys->p_codecs );
1065 free( p_sys->psz_requested_chroma );
1066 free( p_sys->psz_set_ctrls );
1071 /*****************************************************************************
1072 * AccessOpen: opens v4l2 device, access callback
1073 *****************************************************************************
1075 * url: <video device>::::
1077 *****************************************************************************/
1078 static int AccessOpen( vlc_object_t * p_this )
1080 access_t *p_access = (access_t*) p_this;
1081 demux_sys_t * p_sys;
1083 /* Only when selected */
1084 if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
1086 access_InitFields( p_access );
1087 ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1088 p_sys = calloc( 1, sizeof( demux_sys_t ));
1089 if( !p_sys ) return VLC_ENOMEM;
1090 p_access->p_sys = (access_sys_t*)p_sys;
1092 GetV4L2Params( p_sys, (vlc_object_t *) p_access );
1094 ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
1097 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
1099 msg_Dbg( p_this, "Trying direct kernel v4l2" );
1100 use_kernel_v4l2( p_sys );
1101 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
1105 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
1106 use_libv4l2( p_sys );
1108 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
1111 AccessClose( p_this );
1112 return VLC_EGENERIC;
1115 /*****************************************************************************
1117 *****************************************************************************/
1118 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
1122 /* Special for access_demux */
1123 case DEMUX_CAN_PAUSE:
1124 case DEMUX_CAN_SEEK:
1125 case DEMUX_CAN_CONTROL_PACE:
1126 *va_arg( args, bool * ) = false;
1129 case DEMUX_GET_PTS_DELAY:
1130 *va_arg(args,int64_t *) = (int64_t)p_demux->p_sys->i_cache*1000;
1133 case DEMUX_GET_TIME:
1134 *va_arg( args, int64_t * ) = mdate();
1137 /* TODO implement others */
1139 return VLC_EGENERIC;
1142 return VLC_EGENERIC;
1145 /*****************************************************************************
1146 * AccessControl: access callback
1147 *****************************************************************************/
1148 static int AccessControl( access_t *p_access, int i_query, va_list args )
1150 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1155 case ACCESS_CAN_SEEK:
1156 case ACCESS_CAN_FASTSEEK:
1157 case ACCESS_CAN_PAUSE:
1158 case ACCESS_CAN_CONTROL_PACE:
1159 *va_arg( args, bool* ) = false;
1163 case ACCESS_GET_PTS_DELAY:
1164 *va_arg(args,int64_t *) = (int64_t)p_sys->i_cache*1000;
1168 case ACCESS_SET_PAUSE_STATE:
1172 case ACCESS_GET_TITLE_INFO:
1173 case ACCESS_SET_TITLE:
1174 case ACCESS_SET_SEEKPOINT:
1175 case ACCESS_SET_PRIVATE_ID_STATE:
1176 case ACCESS_GET_CONTENT_TYPE:
1177 case ACCESS_GET_META:
1178 return VLC_EGENERIC;
1181 msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1182 return VLC_EGENERIC;
1188 /*****************************************************************************
1189 * AccessRead: access callback
1190 ******************************************************************************/
1191 static block_t *AccessRead( access_t * p_access )
1193 demux_sys_t *p_sys = (demux_sys_t *)p_access->p_sys;
1196 fd.fd = p_sys->i_fd;
1197 fd.events = POLLIN|POLLPRI;
1201 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1203 if( fd.revents & (POLLIN|POLLPRI) )
1205 return GrabVideo( VLC_OBJECT(p_access), p_sys );
1212 /*****************************************************************************
1213 * Demux: Processes the audio or video frame
1214 *****************************************************************************/
1215 static int Demux( demux_t *p_demux )
1217 demux_sys_t *p_sys = p_demux->p_sys;
1220 fd.fd = p_sys->i_fd;
1221 fd.events = POLLIN|POLLPRI;
1225 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1227 if( fd.revents & (POLLIN|POLLPRI) )
1229 block_t *p_block = GrabVideo( VLC_OBJECT(p_demux), p_sys );
1232 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1233 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1241 /*****************************************************************************
1242 * GrabVideo: Grab a video frame
1243 *****************************************************************************/
1244 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
1246 block_t *p_block = NULL;
1247 struct v4l2_buffer buf;
1250 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1252 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1254 /* Did we wait long enough ? (frame rate reduction) */
1255 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1258 /* Grab Video Frame */
1261 case IO_METHOD_READ:
1262 i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1270 /* Could ignore EIO, see spec. */
1273 msg_Err( p_demux, "Failed to read frame" );
1278 p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1279 if( !p_block ) return 0;
1283 case IO_METHOD_MMAP:
1284 memset( &buf, 0, sizeof(buf) );
1285 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1286 buf.memory = V4L2_MEMORY_MMAP;
1288 /* Wait for next frame */
1289 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1296 /* Could ignore EIO, see spec. */
1299 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1304 if( buf.index >= p_sys->i_nbuffers ) {
1305 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1309 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1310 if( !p_block ) return 0;
1313 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1315 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1316 block_Release( p_block );
1322 case IO_METHOD_USERPTR:
1323 memset( &buf, 0, sizeof(buf) );
1324 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1325 buf.memory = V4L2_MEMORY_USERPTR;
1327 /* Wait for next frame */
1328 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1335 /* Could ignore EIO, see spec. */
1338 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1345 for( i = 0; i < p_sys->i_nbuffers; i++ )
1347 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1348 buf.length == p_sys->p_buffers[i].length ) break;
1351 if( i >= p_sys->i_nbuffers )
1353 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1357 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1358 if( !p_block ) return 0;
1361 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1363 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1364 block_Release( p_block );
1373 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1378 /*****************************************************************************
1379 * ProcessVideoFrame: Helper function to take a buffer and copy it into
1381 *****************************************************************************/
1382 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
1386 if( !p_frame ) return 0;
1389 if( !( p_block = block_New( p_demux, i_size ) ) )
1391 msg_Warn( p_demux, "Cannot get new block" );
1396 memcpy( p_block->p_buffer, p_frame, i_size );
1401 /*****************************************************************************
1402 * Helper function to initalise video IO using the Read method
1403 *****************************************************************************/
1404 static int InitRead( vlc_object_t *p_demux, demux_sys_t *p_sys, unsigned int i_buffer_size )
1408 p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1409 if( !p_sys->p_buffers )
1410 return VLC_EGENERIC;
1412 p_sys->p_buffers[0].length = i_buffer_size;
1413 p_sys->p_buffers[0].start = malloc( i_buffer_size );
1414 if( !p_sys->p_buffers[0].start )
1420 /*****************************************************************************
1421 * Helper function to initalise video IO using the mmap method
1422 *****************************************************************************/
1423 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
1425 struct v4l2_requestbuffers req;
1427 memset( &req, 0, sizeof(req) );
1429 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1430 req.memory = V4L2_MEMORY_MMAP;
1432 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1434 msg_Err( p_demux, "device does not support mmap i/o" );
1440 msg_Err( p_demux, "Insufficient buffer memory" );
1444 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1445 if( !p_sys->p_buffers )
1448 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1450 struct v4l2_buffer buf;
1452 memset( &buf, 0, sizeof(buf) );
1453 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1454 buf.memory = V4L2_MEMORY_MMAP;
1455 buf.index = p_sys->i_nbuffers;
1457 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1459 msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1463 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1464 p_sys->p_buffers[p_sys->i_nbuffers].start =
1465 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1467 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1469 msg_Err( p_demux, "mmap failed (%m)" );
1477 return VLC_EGENERIC;
1481 /*****************************************************************************
1482 * Helper function to initalise video IO using the userbuf method
1483 *****************************************************************************/
1484 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
1486 struct v4l2_requestbuffers req;
1487 unsigned int i_page_size;
1489 i_page_size = sysconf(_SC_PAGESIZE);
1490 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1492 memset( &req, 0, sizeof(req) );
1494 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1495 req.memory = V4L2_MEMORY_USERPTR;
1497 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1499 msg_Err( p_demux, "device does not support user pointer i/o" );
1500 return VLC_EGENERIC;
1503 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1504 if( !p_sys->p_buffers )
1507 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1509 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1510 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1511 /* boundary */ i_page_size, i_buffer_size ) )
1518 free( p_sys->p_buffers );
1519 return VLC_EGENERIC;
1523 /*****************************************************************************
1524 * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1525 * in the array of supported formats returned by the driver
1526 *****************************************************************************/
1527 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1529 demux_sys_t *p_sys = p_demux->p_sys;
1531 for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1533 if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1540 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1541 uint32_t i_pixel_format,
1542 uint32_t i_width, uint32_t i_height )
1545 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1547 demux_sys_t *p_sys = p_demux->p_sys;
1549 /* This is new in Linux 2.6.19 */
1550 struct v4l2_frmivalenum frmival;
1551 memset( &frmival, 0, sizeof(frmival) );
1552 frmival.pixel_format = i_pixel_format;
1553 frmival.width = i_width;
1554 frmival.height = i_height;
1555 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1557 switch( frmival.type )
1559 case V4L2_FRMIVAL_TYPE_DISCRETE:
1561 float f_fps_max = -1;
1564 float f_fps = (float)frmival.discrete.denominator
1565 / (float)frmival.discrete.numerator;
1566 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1568 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1572 case V4L2_FRMSIZE_TYPE_STEPWISE:
1573 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1574 return __MAX( (float)frmival.stepwise.max.denominator
1575 / (float)frmival.stepwise.max.numerator,
1576 (float)frmival.stepwise.min.denominator
1577 / (float)frmival.stepwise.min.numerator );
1584 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1585 uint32_t i_pixel_format )
1587 float f_fps_max = -1.;
1588 #ifdef VIDIOC_ENUM_FRAMESIZES
1590 demux_sys_t *p_sys = p_demux->p_sys;
1592 /* This is new in Linux 2.6.19 */
1593 struct v4l2_frmsizeenum frmsize;
1594 memset( &frmsize, 0, sizeof(frmsize) );
1595 frmsize.pixel_format = i_pixel_format;
1596 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1598 switch( frmsize.type )
1600 case V4L2_FRMSIZE_TYPE_DISCRETE:
1604 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1606 frmsize.discrete.width,
1607 frmsize.discrete.height );
1608 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1609 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1612 case V4L2_FRMSIZE_TYPE_STEPWISE:
1614 uint32_t i_width = frmsize.stepwise.min_width;
1615 uint32_t i_height = frmsize.stepwise.min_height;
1617 i_width <= frmsize.stepwise.max_width &&
1618 i_height <= frmsize.stepwise.max_width;
1619 i_width += frmsize.stepwise.step_width,
1620 i_height += frmsize.stepwise.step_height )
1622 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1624 i_width, i_height );
1625 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1629 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1631 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1632 f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1634 frmsize.stepwise.max_width,
1635 frmsize.stepwise.max_height );
1643 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1644 uint32_t i_pixel_format, float f_fps_min,
1645 uint32_t *pi_width, uint32_t *pi_height )
1649 #ifdef VIDIOC_ENUM_FRAMESIZES
1651 demux_sys_t *p_sys = p_demux->p_sys;
1653 /* This is new in Linux 2.6.19 */
1654 struct v4l2_frmsizeenum frmsize;
1655 memset( &frmsize, 0, sizeof(frmsize) );
1656 frmsize.pixel_format = i_pixel_format;
1657 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1659 switch( frmsize.type )
1661 case V4L2_FRMSIZE_TYPE_DISCRETE:
1665 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1667 frmsize.discrete.width,
1668 frmsize.discrete.height );
1669 if( f_fps >= f_fps_min &&
1670 frmsize.discrete.width > *pi_width )
1672 *pi_width = frmsize.discrete.width;
1673 *pi_height = frmsize.discrete.height;
1675 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1678 case V4L2_FRMSIZE_TYPE_STEPWISE:
1680 uint32_t i_width = frmsize.stepwise.min_width;
1681 uint32_t i_height = frmsize.stepwise.min_height;
1683 i_width <= frmsize.stepwise.max_width &&
1684 i_height <= frmsize.stepwise.max_width;
1685 i_width += frmsize.stepwise.step_width,
1686 i_height += frmsize.stepwise.step_height )
1688 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1690 i_width, i_height );
1691 if( f_fps >= f_fps_min && i_width > *pi_width )
1693 *pi_width = i_width;
1694 *pi_height = i_height;
1699 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1701 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1702 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1704 frmsize.stepwise.max_width,
1705 frmsize.stepwise.max_height );
1706 if( f_fps >= f_fps_min &&
1707 frmsize.stepwise.max_width > *pi_width )
1709 *pi_width = frmsize.stepwise.max_width;
1710 *pi_height = frmsize.stepwise.max_height;
1718 /*****************************************************************************
1719 * OpenVideoDev: open and set up the video device and probe for capabilities
1720 *****************************************************************************/
1721 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1724 struct v4l2_cropcap cropcap;
1725 struct v4l2_crop crop;
1726 struct v4l2_format fmt;
1728 enum v4l2_buf_type buf_type;
1729 const char *psz_device = p_sys->psz_device;
1732 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
1734 msg_Err( p_obj, "cannot open device (%m)" );
1739 /* Note the v4l2_xxx functions are designed so that if they get passed an
1740 unknown fd, the will behave exactly as their regular xxx counterparts,
1741 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1742 custom cam format to normal formats conversion). Chances are big we will
1743 still fail then though, as normally v4l2_fd_open only fails if the
1744 device is not a v4l2 device. */
1745 if( p_sys->b_libv4l2 )
1748 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1749 if( libv4l2_fd != -1 )
1754 /* Tune the tuner */
1755 if( p_sys->i_frequency >= 0 )
1757 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1759 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1762 struct v4l2_frequency frequency;
1763 memset( &frequency, 0, sizeof( frequency ) );
1764 frequency.tuner = p_sys->i_cur_tuner;
1765 frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1766 frequency.frequency = p_sys->i_frequency / 62.5;
1767 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1769 msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1772 msg_Dbg( p_obj, "Tuner frequency set" );
1775 /* Set the tuner's audio mode */
1776 if( p_sys->i_audio_mode >= 0 )
1778 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1780 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1783 struct v4l2_tuner tuner;
1784 memset( &tuner, 0, sizeof( tuner ) );
1785 tuner.index = p_sys->i_cur_tuner;
1786 tuner.audmode = p_sys->i_audio_mode;
1787 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1789 msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1792 msg_Dbg( p_obj, "Tuner audio mode set" );
1795 /* Select standard */
1797 if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1799 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1801 msg_Err( p_obj, "cannot set standard (%m)" );
1804 msg_Dbg( p_obj, "Set standard" );
1809 if( p_sys->i_selected_input >= p_sys->i_input )
1811 msg_Warn( p_obj, "invalid input. Using the default one" );
1812 p_sys->i_selected_input = 0;
1815 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1817 msg_Err( p_obj, "cannot set input (%m)" );
1821 /* Set audio input */
1823 if( p_sys->i_audio > 0 )
1825 if( p_sys->i_selected_audio_input < 0
1826 || p_sys->i_selected_audio_input >= p_sys->i_audio )
1828 msg_Warn( p_obj, "invalid audio input. Using the default one" );
1829 p_sys->i_selected_audio_input = 0;
1832 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1834 msg_Err( p_obj, "cannot set audio input (%m)" );
1837 msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1841 /* TODO: Move the resolution stuff up here */
1842 /* if MPEG encoder card, no need to do anything else after this */
1843 ControlList( p_obj, p_sys, i_fd,
1844 var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1845 SetAvailControlsByString( p_obj, p_sys, i_fd );
1847 /* Verify device support for the various IO methods */
1850 case IO_METHOD_READ:
1851 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1853 msg_Err( p_obj, "device does not support read i/o" );
1858 case IO_METHOD_MMAP:
1859 case IO_METHOD_USERPTR:
1860 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1862 msg_Err( p_obj, "device does not support streaming i/o" );
1868 msg_Err( p_obj, "io method not supported" );
1872 /* Reset Cropping */
1873 memset( &cropcap, 0, sizeof(cropcap) );
1874 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1875 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1877 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1878 crop.c = cropcap.defrect; /* reset to default */
1879 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1884 /* Cropping not supported. */
1887 /* Errors ignored. */
1893 /* Try and find default resolution if not specified */
1894 memset( &fmt, 0, sizeof(fmt) );
1895 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1897 if( p_sys->i_width == 0 || p_sys->i_height == 0 )
1899 /* Use current width and height settings */
1900 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
1902 msg_Err( p_obj, "Cannot get default width and height." );
1906 p_sys->i_width = fmt.fmt.pix.width;
1907 p_sys->i_height = fmt.fmt.pix.height;
1909 if( fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE )
1911 p_sys->i_height = p_sys->i_height * 2;
1914 else if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1916 msg_Dbg( p_obj, "will try to find optimal width and height." );
1920 /* Use user specified width and height */
1921 msg_Dbg( p_obj, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
1924 fmt.fmt.pix.width = p_sys->i_width;
1925 fmt.fmt.pix.height = p_sys->i_height;
1926 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1930 demux_t *p_demux = (demux_t *) p_obj;
1932 /* Test and set Chroma */
1933 fmt.fmt.pix.pixelformat = 0;
1934 if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
1936 /* User specified chroma */
1937 const vlc_fourcc_t i_requested_fourcc =
1938 vlc_fourcc_GetCodecFromString( VIDEO_ES, p_sys->psz_requested_chroma );
1940 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
1942 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
1944 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
1948 /* Try and set user chroma */
1949 bool b_error = !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat );
1950 if( !b_error && fmt.fmt.pix.pixelformat )
1952 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1954 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1955 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
1957 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1964 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
1965 fmt.fmt.pix.pixelformat = 0;
1969 /* If no user specified chroma, find best */
1970 /* This also decides if MPEG encoder card or not */
1971 if( !fmt.fmt.pix.pixelformat )
1974 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
1976 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
1977 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) )
1979 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1981 fmt.fmt.pix.field = V4L2_FIELD_ANY;
1982 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1984 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1987 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
1989 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
1994 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1996 if( p_sys->f_fps <= 0 )
1998 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
1999 fmt.fmt.pix.pixelformat );
2000 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
2002 GetMaxDimensions( p_demux, i_fd,
2003 fmt.fmt.pix.pixelformat, p_sys->f_fps,
2004 &fmt.fmt.pix.width, &fmt.fmt.pix.height );
2005 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f of %dx%d",
2006 p_sys->f_fps, fmt.fmt.pix.width, fmt.fmt.pix.height );
2007 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) {;}
2010 /* Reassign width, height and chroma incase driver override */
2011 p_sys->i_width = fmt.fmt.pix.width;
2012 p_sys->i_height = fmt.fmt.pix.height;
2015 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
2016 /* Print extra info */
2017 msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
2018 /* Check interlacing */
2019 switch( fmt.fmt.pix.field )
2021 case V4L2_FIELD_NONE:
2022 msg_Dbg( p_obj, "Interlacing setting: progressive" );
2024 case V4L2_FIELD_TOP:
2025 msg_Dbg( p_obj, "Interlacing setting: top field only" );
2027 case V4L2_FIELD_BOTTOM:
2028 msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
2030 case V4L2_FIELD_INTERLACED:
2031 msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2033 case V4L2_FIELD_SEQ_TB:
2034 msg_Dbg( p_obj, "Interlacing setting: sequential top bottom" );
2036 case V4L2_FIELD_SEQ_BT:
2037 msg_Dbg( p_obj, "Interlacing setting: sequential bottom top" );
2039 case V4L2_FIELD_ALTERNATE:
2040 msg_Dbg( p_obj, "Interlacing setting: alternate fields" );
2042 case V4L2_FIELD_INTERLACED_TB:
2043 msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
2045 case V4L2_FIELD_INTERLACED_BT:
2046 msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
2049 msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
2050 fmt.fmt.pix.field );
2053 if( fmt.fmt.pix.field != V4L2_FIELD_NONE )
2054 msg_Warn( p_obj, "Interlaced inputs haven't been tested. Please report any issue." );
2056 /* Look up final fourcc */
2057 p_sys->i_fourcc = 0;
2058 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2060 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2062 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2063 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2064 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2065 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2066 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2071 /* Buggy driver paranoia */
2072 i_min = fmt.fmt.pix.width * 2;
2073 if( fmt.fmt.pix.bytesperline < i_min )
2074 fmt.fmt.pix.bytesperline = i_min;
2075 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2076 if( fmt.fmt.pix.sizeimage < i_min )
2077 fmt.fmt.pix.sizeimage = i_min;
2079 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2080 /* This is new in Linux 2.6.19 */
2081 /* List supported frame rates */
2082 struct v4l2_frmivalenum frmival;
2083 memset( &frmival, 0, sizeof(frmival) );
2084 frmival.pixel_format = fmt.fmt.pix.pixelformat;
2085 frmival.width = p_sys->i_width;
2086 frmival.height = p_sys->i_height;
2087 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2090 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2091 vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2092 msg_Dbg( p_obj, "supported frame intervals for %4s, %dx%d:",
2093 psz_fourcc, frmival.width, frmival.height );
2094 switch( frmival.type )
2096 case V4L2_FRMIVAL_TYPE_DISCRETE:
2099 msg_Dbg( p_obj, " supported frame interval: %d/%d",
2100 frmival.discrete.numerator,
2101 frmival.discrete.denominator );
2103 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2105 case V4L2_FRMIVAL_TYPE_STEPWISE:
2106 msg_Dbg( p_obj, " supported frame intervals: %d/%d to "
2107 "%d/%d using %d/%d increments",
2108 frmival.stepwise.min.numerator,
2109 frmival.stepwise.min.denominator,
2110 frmival.stepwise.max.numerator,
2111 frmival.stepwise.max.denominator,
2112 frmival.stepwise.step.numerator,
2113 frmival.stepwise.step.denominator );
2115 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2116 msg_Dbg( p_obj, " supported frame intervals: %d/%d to %d/%d",
2117 frmival.stepwise.min.numerator,
2118 frmival.stepwise.min.denominator,
2119 frmival.stepwise.max.numerator,
2120 frmival.stepwise.max.denominator );
2127 /* Init IO method */
2130 case IO_METHOD_READ:
2131 if( InitRead( p_obj, p_sys, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2134 case IO_METHOD_MMAP:
2135 if( InitMmap( p_obj, p_sys, i_fd ) != VLC_SUCCESS ) goto open_failed;
2138 case IO_METHOD_USERPTR:
2139 if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2145 es_fmt.video.i_width = p_sys->i_width;
2146 es_fmt.video.i_height = p_sys->i_height;
2148 /* Get aspect-ratio */
2149 es_fmt.video.i_aspect = p_sys->i_aspect;
2153 demux_t *p_demux = (demux_t *) p_obj;
2154 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2155 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2156 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2163 case IO_METHOD_READ:
2167 case IO_METHOD_MMAP:
2168 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2170 struct v4l2_buffer buf;
2172 memset( &buf, 0, sizeof(buf) );
2173 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2174 buf.memory = V4L2_MEMORY_MMAP;
2177 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2179 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2184 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2185 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2187 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2193 case IO_METHOD_USERPTR:
2194 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2196 struct v4l2_buffer buf;
2198 memset( &buf, 0, sizeof(buf) );
2199 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2200 buf.memory = V4L2_MEMORY_USERPTR;
2202 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2203 buf.length = p_sys->p_buffers[i].length;
2205 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2207 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2212 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2213 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2215 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2223 if( p_sys->f_fps >= 0.1 )
2225 msg_Dbg( p_obj, "User set fps=%f", p_sys->f_fps );
2231 if( i_fd >= 0 ) v4l2_close( i_fd );
2236 /*****************************************************************************
2237 * ProbeVideoDev: probe video for capabilities
2238 *****************************************************************************/
2239 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2240 const char *psz_device )
2247 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
2249 msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2254 /* Note the v4l2_xxx functions are designed so that if they get passed an
2255 unknown fd, the will behave exactly as their regular xxx counterparts,
2256 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2257 custom cam format to normal formats conversion). Chances are big we will
2258 still fail then though, as normally v4l2_fd_open only fails if the
2259 device is not a v4l2 device. */
2260 if( p_sys->b_libv4l2 )
2263 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2264 if( libv4l2_fd != -1 )
2269 /* Get device capabilites */
2271 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2273 msg_Err( p_obj, "cannot get video capabilities (%m)" );
2277 msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2278 p_sys->dev_cap.card,
2279 p_sys->dev_cap.driver,
2280 (p_sys->dev_cap.version >> 16) & 0xFF,
2281 (p_sys->dev_cap.version >> 8) & 0xFF,
2282 p_sys->dev_cap.version & 0xFF,
2283 p_sys->dev_cap.bus_info );
2285 msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capure, "
2288 ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
2289 ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
2290 ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' ') );
2292 msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2294 "(%c) Asynchronous",
2295 ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2296 ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2297 ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2299 /* Now, enumerate all the video inputs. This is useless at the moment
2300 since we have no way to present that info to the user except with
2303 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2305 struct v4l2_input t_input;
2306 memset( &t_input, 0, sizeof(t_input) );
2307 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2310 t_input.index = p_sys->i_input;
2313 p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2314 if( !p_sys->p_inputs ) goto open_failed;
2316 for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2318 p_sys->p_inputs[i_index].index = i_index;
2320 if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2322 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2325 msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2327 p_sys->p_inputs[i_index].name,
2328 p_sys->p_inputs[i_index].type
2329 == V4L2_INPUT_TYPE_TUNER ?
2331 "External analog input",
2332 i_index == p_sys->i_selected_input ? '*' : ' ' );
2336 /* Probe video standards */
2337 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2339 struct v4l2_standard t_standards;
2340 t_standards.index = 0;
2341 p_sys->i_standard = 0;
2342 while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2344 p_sys->i_standard++;
2345 t_standards.index = p_sys->i_standard;
2348 p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2349 if( !p_sys->p_standards ) goto open_failed;
2351 for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2353 p_sys->p_standards[i_standard].index = i_standard;
2355 if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2357 msg_Err( p_obj, "cannot get video input standards (%m)" );
2360 msg_Dbg( p_obj, "video standard %i is: %s %c",
2362 p_sys->p_standards[i_standard].name,
2363 (unsigned)i_standard == p_sys->i_selected_standard_id ? '*' : ' ' );
2367 /* initialize the structures for the ioctls */
2368 for( i_index = 0; i_index < 32; i_index++ )
2370 p_sys->p_audios[i_index].index = i_index;
2373 /* Probe audio inputs */
2374 if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2376 while( p_sys->i_audio < 32 &&
2377 v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2379 if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2381 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2385 msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2387 p_sys->p_audios[p_sys->i_audio].name,
2388 p_sys->p_audios[p_sys->i_audio].capability &
2389 V4L2_AUDCAP_STEREO ?
2391 p_sys->p_audios[p_sys->i_audio].capability &
2393 "(Automatic Volume Level supported)" : "",
2394 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2400 /* List tuner caps */
2401 if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2403 struct v4l2_tuner tuner;
2404 memset( &tuner, 0, sizeof(tuner) );
2406 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2409 memset( &tuner, 0, sizeof(tuner) );
2410 tuner.index = p_sys->i_tuner;
2413 p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2414 if( !p_sys->p_tuners ) goto open_failed;
2416 for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2418 p_sys->p_tuners[i_index].index = i_index;
2420 if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2422 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2425 msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2426 "frequency range: %.1f %s -> %.1f %s",
2428 p_sys->p_tuners[i_index].name,
2429 p_sys->p_tuners[i_index].type
2430 == V4L2_TUNER_RADIO ?
2431 "Radio" : "Analog TV",
2432 p_sys->p_tuners[i_index].rangelow * 62.5,
2433 p_sys->p_tuners[i_index].capability &
2434 V4L2_TUNER_CAP_LOW ?
2436 p_sys->p_tuners[i_index].rangehigh * 62.5,
2437 p_sys->p_tuners[i_index].capability &
2438 V4L2_TUNER_CAP_LOW ?
2441 struct v4l2_frequency frequency;
2442 memset( &frequency, 0, sizeof( frequency ) );
2443 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2445 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2448 msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2450 p_sys->p_tuners[i_index].name,
2451 frequency.frequency * 62.5,
2452 p_sys->p_tuners[i_index].capability &
2453 V4L2_TUNER_CAP_LOW ?
2458 /* Probe for available chromas */
2459 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2461 struct v4l2_fmtdesc codec;
2464 memset( &codec, 0, sizeof(codec) );
2465 codec.index = i_index;
2466 codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2468 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2471 codec.index = i_index;
2474 p_sys->i_codec = i_index;
2476 p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2478 for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2480 p_sys->p_codecs[i_index].index = i_index;
2481 p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2483 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2485 msg_Err( p_obj, "cannot get codec description (%m)" );
2489 /* only print if vlc supports the format */
2490 char psz_fourcc_v4l2[5];
2491 memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2492 vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2494 bool b_codec_supported = false;
2495 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2497 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2499 b_codec_supported = true;
2502 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2503 vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2505 msg_Dbg( p_obj, "device supports chroma %4s [%s, %s]",
2507 p_sys->p_codecs[i_index].description,
2510 #ifdef VIDIOC_ENUM_FRAMESIZES
2511 /* This is new in Linux 2.6.19 */
2512 /* List valid frame sizes for this format */
2513 struct v4l2_frmsizeenum frmsize;
2514 memset( &frmsize, 0, sizeof(frmsize) );
2515 frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2516 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2518 /* Not all devices support this ioctl */
2519 msg_Warn( p_obj, "Unable to query for frame sizes" );
2523 switch( frmsize.type )
2525 case V4L2_FRMSIZE_TYPE_DISCRETE:
2529 " device supports size %dx%d",
2530 frmsize.discrete.width, frmsize.discrete.height );
2532 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2534 case V4L2_FRMSIZE_TYPE_STEPWISE:
2536 " device supports sizes %dx%d to %dx%d using %dx%d increments",
2537 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2538 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2539 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2541 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2543 " device supports all sizes %dx%d to %dx%d",
2544 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2545 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2552 if( !b_codec_supported )
2555 "device codec %4s (%s) not supported",
2557 p_sys->p_codecs[i_index].description );
2563 if( i_fd >= 0 ) v4l2_close( i_fd );
2568 if( i_fd >= 0 ) v4l2_close( i_fd );
2573 static void name2var( unsigned char *name )
2575 for( ; *name; name++ )
2576 *name = (*name == ' ') ? '_' : tolower( *name );
2579 /*****************************************************************************
2580 * Print a user-class v4l2 control's details, create the relevant variable,
2581 * change the value if needed.
2582 *****************************************************************************/
2583 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2584 struct v4l2_queryctrl queryctrl,
2585 bool b_reset, bool b_demux )
2587 struct v4l2_querymenu querymenu;
2594 vlc_value_t val, val2;
2596 if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2597 msg_Dbg( p_obj, " control is busy" );
2598 if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2599 msg_Dbg( p_obj, " control is read-only" );
2601 for( i = 0; controls[i].psz_name != NULL; i++ )
2602 if( controls[i].i_cid == queryctrl.id ) break;
2604 if( controls[i].psz_name )
2606 psz_name = strdup( controls[i].psz_name );
2607 char psz_cfg_name[40];
2608 sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2609 i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2610 var_Destroy( p_obj, psz_cfg_name );
2614 psz_name = strdup( (const char *)queryctrl.name );
2615 name2var( (unsigned char *)psz_name );
2619 switch( queryctrl.type )
2621 case V4L2_CTRL_TYPE_INTEGER:
2622 msg_Dbg( p_obj, " integer control" );
2624 " valid values: %d to %d by steps of %d",
2625 queryctrl.minimum, queryctrl.maximum,
2628 var_Create( p_obj, psz_name,
2629 VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2630 | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2631 val.i_int = queryctrl.minimum;
2632 var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2633 val.i_int = queryctrl.maximum;
2634 var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2635 val.i_int = queryctrl.step;
2636 var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2638 case V4L2_CTRL_TYPE_BOOLEAN:
2639 msg_Dbg( p_obj, " boolean control" );
2640 var_Create( p_obj, psz_name,
2641 VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2643 case V4L2_CTRL_TYPE_MENU:
2644 msg_Dbg( p_obj, " menu control" );
2645 var_Create( p_obj, psz_name,
2646 VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2647 | VLC_VAR_ISCOMMAND );
2648 memset( &querymenu, 0, sizeof( querymenu ) );
2649 for( i_mid = queryctrl.minimum;
2650 i_mid <= (unsigned)queryctrl.maximum;
2653 querymenu.index = i_mid;
2654 querymenu.id = queryctrl.id;
2655 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2657 msg_Dbg( p_obj, " %d: %s",
2658 querymenu.index, querymenu.name );
2659 val.i_int = querymenu.index;
2660 val2.psz_string = (char *)querymenu.name;
2661 var_Change( p_obj, psz_name,
2662 VLC_VAR_ADDCHOICE, &val, &val2 );
2666 case V4L2_CTRL_TYPE_BUTTON:
2667 msg_Dbg( p_obj, " button control" );
2668 var_Create( p_obj, psz_name,
2669 VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2671 case V4L2_CTRL_TYPE_CTRL_CLASS:
2672 msg_Dbg( p_obj, " control class" );
2673 var_Create( p_obj, psz_name, VLC_VAR_VOID );
2676 msg_Dbg( p_obj, " unknown control type (FIXME)" );
2681 switch( queryctrl.type )
2683 case V4L2_CTRL_TYPE_INTEGER:
2684 case V4L2_CTRL_TYPE_BOOLEAN:
2685 case V4L2_CTRL_TYPE_MENU:
2687 struct v4l2_control control;
2688 msg_Dbg( p_obj, " default value: %d",
2689 queryctrl.default_value );
2690 memset( &control, 0, sizeof( control ) );
2691 control.id = queryctrl.id;
2692 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2694 msg_Dbg( p_obj, " current value: %d", control.value );
2698 i_val = control.value;
2699 if( b_reset && queryctrl.default_value != control.value )
2701 msg_Dbg( p_obj, " reset value to default" );
2702 Control( p_obj, p_sys, i_fd, psz_name,
2703 queryctrl.id, queryctrl.default_value );
2708 Control( p_obj, p_sys, i_fd, psz_name,
2709 queryctrl.id, i_val );
2717 val.psz_string = (char *)queryctrl.name;
2718 var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2719 val.i_int = queryctrl.id;
2720 val2.psz_string = (char *)psz_name;
2721 var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2722 /* bad things happen changing MPEG mid-stream
2723 * so don't add to Ext Settings GUI */
2724 if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2725 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2727 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2730 var_SetBool( p_obj, psz_name, i_val );
2732 case VLC_VAR_INTEGER:
2733 var_SetInteger( p_obj, psz_name, i_val );
2738 msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2744 var_AddCallback( p_obj, psz_name,
2745 DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2747 var_AddCallback( p_obj, psz_name,
2748 AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2753 /*****************************************************************************
2754 * List all user-class v4l2 controls, set them to the user specified
2755 * value and create the relevant variables to enable runtime changes
2756 *****************************************************************************/
2757 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2758 bool b_reset, bool b_demux )
2760 struct v4l2_queryctrl queryctrl;
2763 memset( &queryctrl, 0, sizeof( queryctrl ) );
2765 /* A list of available controls (aka the variable name) will be
2766 * stored as choices in the "allcontrols" variable. We'll thus be able
2767 * to use those to create an appropriate interface
2768 * A list of available controls that can be changed mid-stream will
2769 * be stored in the "controls" variable */
2770 var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2771 var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2773 var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2775 /* Add a control to reset all controls to their default values */
2776 vlc_value_t val, val2;
2777 var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2778 val.psz_string = _( "Reset controls to default" );
2779 var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2781 val2.psz_string = (char *)"controls-reset";
2782 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2784 var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2786 var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2788 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2789 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2791 msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2793 /* List extended controls */
2794 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2795 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2797 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2799 msg_Dbg( p_obj, "%s", queryctrl.name );
2800 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2803 switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2805 case V4L2_CTRL_CLASS_USER:
2806 msg_Dbg( p_obj, "Available control: %s (%x)",
2807 queryctrl.name, queryctrl.id );
2809 case V4L2_CTRL_CLASS_MPEG:
2810 name2var( queryctrl.name );
2811 msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2812 queryctrl.name, queryctrl.id );
2815 msg_Dbg( p_obj, "Available private control: %s (%x)",
2816 queryctrl.name, queryctrl.id );
2819 ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
2820 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2825 msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
2827 /* List public controls */
2828 for( i_cid = V4L2_CID_BASE;
2829 i_cid < V4L2_CID_LASTP1;
2832 queryctrl.id = i_cid;
2833 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2835 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2837 msg_Dbg( p_obj, "Available control: %s (%x)",
2838 queryctrl.name, queryctrl.id );
2839 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2844 /* List private controls */
2845 for( i_cid = V4L2_CID_PRIVATE_BASE;
2849 queryctrl.id = i_cid;
2850 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2852 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2854 msg_Dbg( p_obj, "Available private control: %s (%x)",
2855 queryctrl.name, queryctrl.id );
2856 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2867 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
2870 char *psz_parser = p_sys->psz_set_ctrls;
2871 vlc_value_t val, text, name;
2873 if( psz_parser == NULL )
2876 if( *psz_parser == '{' )
2879 int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
2883 msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
2887 while( *psz_parser && *psz_parser != '}' )
2889 char *psz_delim, *psz_assign;
2891 while( *psz_parser == ',' || *psz_parser == ' ' )
2894 psz_delim = strchr( psz_parser, ',' );
2895 if( psz_delim == NULL )
2896 psz_delim = strchr( psz_parser, '}' );
2897 if( psz_delim == NULL )
2898 psz_delim = psz_parser + strlen( psz_parser );
2900 psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
2901 if( psz_assign == NULL )
2903 char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
2904 msg_Err( p_obj, "%s missing '='", psz_name );
2906 psz_parser = psz_delim + 1;
2911 i < val.p_list->i_count ;//&& psz_parser < psz_assign;
2914 const char *psz_var = text.p_list->p_values[i].psz_string;
2915 int i_cid = val.p_list->p_values[i].i_int;
2916 var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
2917 const char *psz_name = name.psz_string;
2919 int i_availstrlen = strlen( psz_name );
2920 int i_parsestrlen = psz_assign - psz_parser;
2921 int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
2923 if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
2925 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
2926 strtol( ++psz_assign, &psz_parser, 0) );
2928 free( name.psz_string );
2931 if( psz_parser < psz_assign )
2933 char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
2934 msg_Err( p_obj, "Control %s not available", psz_name );
2936 psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
2939 var_FreeList( &val, &text );
2942 /*****************************************************************************
2943 * Reset all user-class v4l2 controls to their default value
2944 *****************************************************************************/
2945 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
2947 struct v4l2_queryctrl queryctrl;
2949 memset( &queryctrl, 0, sizeof( queryctrl ) );
2951 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2952 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2954 /* Extended control API supported */
2955 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2956 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2958 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
2959 || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
2961 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2964 struct v4l2_control control;
2965 memset( &control, 0, sizeof( control ) );
2966 control.id = queryctrl.id;
2967 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2968 && queryctrl.default_value != control.value )
2971 for( i = 0; controls[i].psz_name != NULL; i++ )
2972 if( controls[i].i_cid == queryctrl.id ) break;
2973 name2var( queryctrl.name );
2974 Control( p_obj, p_sys, i_fd,
2975 controls[i].psz_name ? controls[i].psz_name
2976 : (const char *)queryctrl.name,
2977 queryctrl.id, queryctrl.default_value );
2979 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2985 /* public controls */
2986 for( i_cid = V4L2_CID_BASE;
2987 i_cid < V4L2_CID_LASTP1;
2990 queryctrl.id = i_cid;
2991 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2993 struct v4l2_control control;
2994 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2996 memset( &control, 0, sizeof( control ) );
2997 control.id = queryctrl.id;
2998 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2999 && queryctrl.default_value != control.value )
3002 for( i = 0; controls[i].psz_name != NULL; i++ )
3003 if( controls[i].i_cid == queryctrl.id ) break;
3004 name2var( queryctrl.name );
3005 Control( p_obj, p_sys, i_fd,
3006 controls[i].psz_name ? controls[i].psz_name
3007 : (const char *)queryctrl.name,
3008 queryctrl.id, queryctrl.default_value );
3013 /* private controls */
3014 for( i_cid = V4L2_CID_PRIVATE_BASE;
3018 queryctrl.id = i_cid;
3019 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3021 struct v4l2_control control;
3022 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3024 memset( &control, 0, sizeof( control ) );
3025 control.id = queryctrl.id;
3026 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3027 && queryctrl.default_value != control.value )
3029 name2var( queryctrl.name );
3030 Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3031 queryctrl.id, queryctrl.default_value );
3041 /*****************************************************************************
3042 * Issue user-class v4l2 controls
3043 *****************************************************************************/
3044 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3045 const char *psz_name, int i_cid, int i_value )
3048 struct v4l2_queryctrl queryctrl;
3049 struct v4l2_control control;
3050 struct v4l2_ext_control ext_control;
3051 struct v4l2_ext_controls ext_controls;
3056 memset( &queryctrl, 0, sizeof( queryctrl ) );
3058 queryctrl.id = i_cid;
3060 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3061 || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3063 msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3064 return VLC_EGENERIC;
3067 memset( &control, 0, sizeof( control ) );
3068 memset( &ext_control, 0, sizeof( ext_control ) );
3069 memset( &ext_controls, 0, sizeof( ext_controls ) );
3071 ext_control.id = i_cid;
3072 ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3073 ext_controls.count = 1;
3074 ext_controls.controls = &ext_control;
3078 if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3080 ext_control.value = i_value;
3081 if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3083 control.value = i_value;
3084 if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3086 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3087 psz_name, i_cid, i_value );
3088 return VLC_EGENERIC;
3090 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3094 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3095 control.value = ext_control.value;
3102 msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3103 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3106 val.b_bool = control.value;
3107 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3108 var_TriggerCallback( p_obj, "controls-update" );
3110 case VLC_VAR_INTEGER:
3111 val.i_int = control.value;
3112 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3113 var_TriggerCallback( p_obj, "controls-update" );
3120 /*****************************************************************************
3121 * On the fly change settings callback
3122 *****************************************************************************/
3123 static int DemuxControlCallback( vlc_object_t *p_this,
3124 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3128 demux_t *p_demux = (demux_t*)p_this;
3129 demux_sys_t *p_sys = p_demux->p_sys;
3130 int i_cid = (long int)p_data;
3132 int i_fd = p_sys->i_fd;
3135 return VLC_EGENERIC;
3137 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3139 return VLC_EGENERIC;
3142 static int DemuxControlResetCallback( vlc_object_t *p_this,
3143 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3145 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3146 demux_t *p_demux = (demux_t*)p_this;
3147 demux_sys_t *p_sys = p_demux->p_sys;
3149 int i_fd = p_sys->i_fd;
3152 return VLC_EGENERIC;
3154 ControlReset( p_this, p_sys, i_fd );
3156 return VLC_EGENERIC;
3159 static int AccessControlCallback( vlc_object_t *p_this,
3160 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3164 access_t *p_access = (access_t *)p_this;
3165 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3166 int i_cid = (long int)p_data;
3168 int i_fd = p_sys->i_fd;
3171 return VLC_EGENERIC;
3173 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3175 return VLC_EGENERIC;
3178 static int AccessControlResetCallback( vlc_object_t *p_this,
3179 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3181 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3182 access_t *p_access = (access_t *)p_this;
3183 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3185 int i_fd = p_sys->i_fd;
3188 return VLC_EGENERIC;
3190 ControlReset( p_this, p_sys, i_fd );
3192 return VLC_EGENERIC;