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 );
400 } v4l2chroma_to_fourcc[] =
403 { V4L2_PIX_FMT_GREY, VLC_FOURCC('G','R','E','Y'), 0, 0, 0 },
404 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
405 { V4L2_PIX_FMT_RGB555, VLC_FOURCC('R','V','1','5'), 0x001f,0x03e0,0x7c00 },
406 { V4L2_PIX_FMT_RGB565, VLC_FOURCC('R','V','1','6'), 0x001f,0x07e0,0xf800 },
407 /* Won't work since we don't know how to handle such gmask values
409 { V4L2_PIX_FMT_RGB555X, VLC_FOURCC('R','V','1','5'), 0x007c,0xe003,0x1f00 },
410 { V4L2_PIX_FMT_RGB565X, VLC_FOURCC('R','V','1','6'), 0x00f8,0xe007,0x1f00 },
412 { V4L2_PIX_FMT_BGR24, VLC_FOURCC('R','V','2','4'), 0xff0000,0xff00,0xff },
413 { V4L2_PIX_FMT_RGB24, VLC_FOURCC('R','V','2','4'), 0xff,0xff00,0xff0000 },
414 { V4L2_PIX_FMT_BGR32, VLC_FOURCC('R','V','3','2'), 0xff0000,0xff00,0xff },
415 { V4L2_PIX_FMT_RGB32, VLC_FOURCC('R','V','3','2'), 0xff,0xff00,0xff0000 },
416 { V4L2_PIX_FMT_YUYV, VLC_FOURCC('Y','U','Y','2'), 0, 0, 0 },
417 { V4L2_PIX_FMT_YUYV, VLC_FOURCC('Y','U','Y','V'), 0, 0, 0 },
418 { V4L2_PIX_FMT_UYVY, VLC_FOURCC('U','Y','V','Y'), 0, 0, 0 },
419 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
420 { V4L2_PIX_FMT_YUV422P, VLC_FOURCC('I','4','2','2'), 0, 0, 0 },
421 { V4L2_PIX_FMT_YVU420, VLC_FOURCC('Y','V','1','2'), 0, 0, 0 },
422 { V4L2_PIX_FMT_YUV411P, VLC_FOURCC('I','4','1','1'), 0, 0, 0 },
423 { V4L2_PIX_FMT_YUV410, VLC_FOURCC('I','4','1','0'), 0, 0, 0 },
425 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
427 { V4L2_PIX_FMT_YUV420, VLC_FOURCC('I','4','2','0'), 0, 0, 0 },
428 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_FOURCC('R','V','3','2') }, */
430 /* Compressed data types */
431 { V4L2_PIX_FMT_MJPEG, VLC_FOURCC('M','J','P','G'), 0, 0, 0 },
433 { V4L2_PIX_FMT_JPEG, VLC_FOURCC('J','P','E','G') },
434 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
435 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
441 * List of V4L2 chromas were confident enough to use as fallbacks if the
442 * user hasn't provided a --v4l2-chroma value.
444 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
446 static const __u32 p_chroma_fallbacks[] =
447 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
448 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
449 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG };
453 const char *psz_name;
457 { "brightness", V4L2_CID_BRIGHTNESS },
458 { "contrast", V4L2_CID_CONTRAST },
459 { "saturation", V4L2_CID_SATURATION },
460 { "hue", V4L2_CID_HUE },
461 { "audio-volume", V4L2_CID_AUDIO_VOLUME },
462 { "audio-balance", V4L2_CID_AUDIO_BALANCE },
463 { "audio-bass", V4L2_CID_AUDIO_BASS },
464 { "audio-treble", V4L2_CID_AUDIO_TREBLE },
465 { "audio-mute", V4L2_CID_AUDIO_MUTE },
466 { "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
467 { "black-level", V4L2_CID_BLACK_LEVEL },
468 { "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
469 { "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
470 { "red-balance", V4L2_CID_RED_BALANCE },
471 { "blue-balance", V4L2_CID_BLUE_BALANCE },
472 { "gamma", V4L2_CID_GAMMA },
473 { "exposure", V4L2_CID_EXPOSURE },
474 { "autogain", V4L2_CID_AUTOGAIN },
475 { "gain", V4L2_CID_GAIN },
476 { "hflip", V4L2_CID_HFLIP },
477 { "vflip", V4L2_CID_VFLIP },
478 { "hcenter", V4L2_CID_HCENTER },
479 { "vcenter", V4L2_CID_VCENTER },
491 char *psz_device; /* Main device from MRL */
494 char *psz_requested_chroma;
501 struct v4l2_capability dev_cap;
504 struct v4l2_input *p_inputs;
505 int i_selected_input;
508 struct v4l2_standard *p_standards;
509 v4l2_std_id i_selected_standard_id;
512 /* V4L2 devices cannot have more than 32 audio inputs */
513 struct v4l2_audio p_audios[32];
514 int i_selected_audio_input;
517 struct v4l2_tuner *p_tuners;
520 struct v4l2_fmtdesc *p_codecs;
522 struct buffer_t *p_buffers;
523 unsigned int i_nbuffers;
527 float f_fps; /* <= 0.0 mean to grab at full rate */
528 mtime_t i_video_pts; /* only used when f_fps > 0 */
544 int (*pf_close)( int );
545 int (*pf_dup)( int );
546 int (*pf_ioctl)( int, unsigned long int, ... );
547 ssize_t (*pf_read)( int, void *, size_t );
548 void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
549 int (*pf_munmap)( void *, size_t );
555 static void use_kernel_v4l2( demux_sys_t *p_sys )
557 p_sys->pf_close = close;
559 p_sys->pf_ioctl = ioctl;
560 p_sys->pf_read = read;
561 p_sys->pf_mmap = mmap;
562 p_sys->pf_munmap = munmap;
563 p_sys->b_libv4l2 = false;
566 static void use_libv4l2( demux_sys_t *p_sys )
568 p_sys->pf_close = v4l2_close;
569 p_sys->pf_dup = v4l2_dup;
570 p_sys->pf_ioctl = v4l2_ioctl;
571 p_sys->pf_read = v4l2_read;
572 p_sys->pf_mmap = v4l2_mmap;
573 p_sys->pf_munmap = v4l2_munmap;
574 p_sys->b_libv4l2 = true;
577 # define v4l2_close (p_sys->pf_close)
578 # define v4l2_dup (p_sys->pf_dup)
579 # define v4l2_ioctl (p_sys->pf_ioctl)
580 # define v4l2_read (p_sys->pf_read)
581 # define v4l2_mmap (p_sys->pf_mmap)
582 # define v4l2_munmap (p_sys->pf_munmap)
584 # define v4l2_close close
585 # define v4l2_dup dup
586 # define v4l2_ioctl ioctl
587 # define v4l2_read read
588 # define v4l2_mmap mmap
589 # define v4l2_munmap munmap
592 static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
595 /* TODO: if using default device, loop through all /dev/video* until
597 msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
598 if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
600 msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
601 p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
604 if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
608 /*****************************************************************************
609 * DemuxOpen: opens v4l2 device, access_demux callback
610 *****************************************************************************
612 * url: <video device>::::
614 *****************************************************************************/
615 static int DemuxOpen( vlc_object_t *p_this )
617 demux_t *p_demux = (demux_t*)p_this;
620 /* Only when selected */
621 if( strcmp( p_demux->psz_access, "v4l2" ) )
625 p_demux->pf_control = DemuxControl;
626 p_demux->pf_demux = Demux;
627 p_demux->info.i_update = 0;
628 p_demux->info.i_title = 0;
629 p_demux->info.i_seekpoint = 0;
631 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
632 if( p_sys == NULL ) return VLC_ENOMEM;
634 GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
636 ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
639 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
641 msg_Dbg( p_this, "Trying direct kernel v4l2" );
642 use_kernel_v4l2( p_sys );
643 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
647 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
648 use_libv4l2( p_sys );
650 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
653 DemuxClose( p_this );
657 /*****************************************************************************
658 * GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
659 *****************************************************************************/
660 static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
662 p_sys->i_video_pts = -1;
664 p_sys->i_selected_standard_id =
665 i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
667 p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
668 p_sys->i_selected_audio_input =
669 var_CreateGetInteger( p_obj, "v4l2-audio-input" );
671 p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
673 p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
674 p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
676 var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
678 p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
679 p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
681 p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
683 p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
684 p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
685 p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
687 p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
689 p_sys->psz_device = NULL;
695 /*****************************************************************************
696 * ParseMRL: parse the options contained in the MRL
697 *****************************************************************************/
698 static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
700 char *psz_dup = strdup( psz_path );
701 char *psz_parser = psz_dup;
703 while( *psz_parser && *psz_parser != ':' )
708 if( *psz_parser == ':' )
713 *psz_parser++ = '\0';
715 if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
717 psz_parser += strlen( "standard=" );
718 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
720 p_sys->i_selected_standard_id = V4L2_STD_PAL;
721 psz_parser += strlen( "pal" );
723 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
725 p_sys->i_selected_standard_id = V4L2_STD_NTSC;
726 psz_parser += strlen( "ntsc" );
728 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
730 p_sys->i_selected_standard_id = V4L2_STD_SECAM;
731 psz_parser += strlen( "secam" );
733 else if( !strncmp( psz_parser, "default", strlen( "default" ) ) )
735 p_sys->i_selected_standard_id = V4L2_STD_UNKNOWN;
736 psz_parser += strlen( "default" );
740 p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
743 else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
747 psz_parser += strlen( "chroma=" );
748 if( strchr( psz_parser, ':' ) )
750 i_len = strchr( psz_parser, ':' ) - psz_parser;
754 i_len = strlen( psz_parser );
757 free( p_sys->psz_requested_chroma );
758 p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
762 else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
764 p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
767 else if( !strncmp( psz_parser, "audio-input=", strlen( "audio-input=" ) ) )
769 p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-input=" ),
772 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
774 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
777 else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
779 psz_parser += strlen( "io=" );
780 if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
782 p_sys->io = IO_METHOD_READ;
783 psz_parser += strlen( "read" );
785 else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
787 p_sys->io = IO_METHOD_MMAP;
788 psz_parser += strlen( "mmap" );
790 else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
792 p_sys->io = IO_METHOD_USERPTR;
793 psz_parser += strlen( "userptr" );
797 p_sys->io = strtol( psz_parser, &psz_parser, 0 );
800 else if( !strncmp( psz_parser, "width=",
801 strlen( "width=" ) ) )
804 strtol( psz_parser + strlen( "width=" ),
807 else if( !strncmp( psz_parser, "height=",
808 strlen( "height=" ) ) )
811 strtol( psz_parser + strlen( "height=" ),
814 else if( !strncmp( psz_parser, "controls-reset",
815 strlen( "controls-reset" ) ) )
817 var_SetBool( p_obj, "v4l2-controls-reset", true );
818 psz_parser += strlen( "controls-reset" );
821 else if( !strncmp( psz_parser, "brightness=",
822 strlen( "brightness=" ) ) )
824 var_SetInteger( p_obj, "brightness",
825 strtol( psz_parser + strlen( "brightness=" ),
828 else if( !strncmp( psz_parser, "contrast=",
829 strlen( "contrast=" ) ) )
831 var_SetInteger( p_obj, "contrast",
832 strtol( psz_parser + strlen( "contrast=" ),
835 else if( !strncmp( psz_parser, "saturation=",
836 strlen( "saturation=" ) ) )
838 var_SetInteger( p_obj, "saturation",
839 strtol( psz_parser + strlen( "saturation=" ),
842 else if( !strncmp( psz_parser, "hue=",
845 var_SetInteger( p_obj, "hue",
846 strtol( psz_parser + strlen( "hue=" ),
849 else if( !strncmp( psz_parser, "gamma=",
850 strlen( "gamma=" ) ) )
852 var_SetInteger( p_obj, "gamma",
853 strtol( psz_parser + strlen( "gamma=" ),
857 else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
859 p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
862 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
864 p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
867 else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
869 p_sys->i_frequency = strtol( psz_parser
870 + strlen( "tuner-frequency=" ),
873 else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
875 p_sys->i_audio_mode = strtol( psz_parser
876 + strlen( "tuner-audio-mode=" ),
879 else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
883 psz_parser += strlen( "set-ctrls=" );
884 if( strchr( psz_parser, ':' ) )
886 i_len = strchr( psz_parser, ':' ) - psz_parser;
890 i_len = strlen( psz_parser );
893 p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
897 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
898 || !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
899 || !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
900 || !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
901 || !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
903 if( strchr( psz_parser, ':' ) )
905 psz_parser = strchr( psz_parser, ':' );
909 psz_parser += strlen( psz_parser );
912 msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
916 char *psz_unk = strchr( psz_parser, ':' );
918 psz_unk = strndup( psz_parser, psz_unk - psz_parser );
920 psz_unk = strdup( psz_parser);
921 msg_Warn( p_obj, "unknown option %s", psz_unk );
925 while( *psz_parser && *psz_parser != ':' )
930 if( *psz_parser == '\0' )
939 p_sys->psz_device = strdup( psz_dup );
941 p_sys->psz_device = strdup( V4L2_DEFAULT );
945 /*****************************************************************************
946 * Close: close device, free resources
947 *****************************************************************************/
948 static void AccessClose( vlc_object_t *p_this )
950 access_t *p_access = (access_t *)p_this;
951 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
953 CommonClose( p_this, p_sys );
956 static void DemuxClose( vlc_object_t *p_this )
958 struct v4l2_buffer buf;
959 enum v4l2_buf_type buf_type;
962 demux_t *p_demux = (demux_t *)p_this;
963 demux_sys_t *p_sys = p_demux->p_sys;
965 /* Stop video capture */
966 if( p_sys->i_fd >= 0 )
975 case IO_METHOD_USERPTR:
976 /* Some drivers 'hang' internally if this is not done before streamoff */
977 for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
979 memset( &buf, 0, sizeof(buf) );
980 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
981 buf.memory = ( p_sys->io == IO_METHOD_USERPTR ) ?
982 V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
983 v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
986 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
987 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
988 msg_Err( p_this, "VIDIOC_STREAMOFF failed" );
995 /* Free Video Buffers */
996 if( p_sys->p_buffers ) {
1000 free( p_sys->p_buffers[0].start );
1003 case IO_METHOD_MMAP:
1004 for( i = 0; i < p_sys->i_nbuffers; ++i )
1006 if( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
1008 msg_Err( p_this, "munmap failed" );
1013 case IO_METHOD_USERPTR:
1014 for( i = 0; i < p_sys->i_nbuffers; ++i )
1016 free( p_sys->p_buffers[i].start );
1020 free( p_sys->p_buffers );
1023 CommonClose( p_this, p_sys );
1026 static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
1030 if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
1031 free( p_sys->psz_device );
1032 free( p_sys->p_standards );
1033 free( p_sys->p_inputs );
1034 free( p_sys->p_tuners );
1035 free( p_sys->p_codecs );
1036 free( p_sys->psz_requested_chroma );
1037 free( p_sys->psz_set_ctrls );
1042 /*****************************************************************************
1043 * AccessOpen: opens v4l2 device, access callback
1044 *****************************************************************************
1046 * url: <video device>::::
1048 *****************************************************************************/
1049 static int AccessOpen( vlc_object_t * p_this )
1051 access_t *p_access = (access_t*) p_this;
1052 demux_sys_t * p_sys;
1054 /* Only when selected */
1055 if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
1057 access_InitFields( p_access );
1058 ACCESS_SET_CALLBACKS( AccessRead, NULL, AccessControl, NULL );
1059 p_sys = calloc( 1, sizeof( demux_sys_t ));
1060 if( !p_sys ) return VLC_ENOMEM;
1061 p_access->p_sys = (access_sys_t*)p_sys;
1063 GetV4L2Params( p_sys, (vlc_object_t *) p_access );
1065 ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
1068 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
1070 msg_Dbg( p_this, "Trying direct kernel v4l2" );
1071 use_kernel_v4l2( p_sys );
1072 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
1076 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
1077 use_libv4l2( p_sys );
1079 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
1082 AccessClose( p_this );
1083 return VLC_EGENERIC;
1086 /*****************************************************************************
1088 *****************************************************************************/
1089 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
1091 demux_sys_t *p_sys = p_demux->p_sys;
1097 /* Special for access_demux */
1098 case DEMUX_CAN_PAUSE:
1099 case DEMUX_CAN_SEEK:
1100 case DEMUX_SET_PAUSE_STATE:
1101 case DEMUX_CAN_CONTROL_PACE:
1102 pb = (bool*)va_arg( args, bool * );
1106 case DEMUX_GET_PTS_DELAY:
1107 pi64 = (int64_t*)va_arg( args, int64_t * );
1108 *pi64 = (int64_t)p_sys->i_cache * 1000;
1111 case DEMUX_GET_TIME:
1112 pi64 = (int64_t*)va_arg( args, int64_t * );
1116 /* TODO implement others */
1118 return VLC_EGENERIC;
1121 return VLC_EGENERIC;
1124 /*****************************************************************************
1125 * AccessControl: access callback
1126 *****************************************************************************/
1127 static int AccessControl( access_t *p_access, int i_query, va_list args )
1131 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1136 case ACCESS_CAN_SEEK:
1137 case ACCESS_CAN_FASTSEEK:
1138 pb_bool = (bool*)va_arg( args, bool* );
1141 case ACCESS_CAN_PAUSE:
1142 pb_bool = (bool*)va_arg( args, bool* );
1145 case ACCESS_CAN_CONTROL_PACE:
1146 pb_bool = (bool*)va_arg( args, bool* );
1151 case ACCESS_GET_PTS_DELAY:
1152 pi_64 = (int64_t*)va_arg( args, int64_t * );
1153 *pi_64 = (int64_t) p_sys->i_cache * 1000;
1157 case ACCESS_SET_PAUSE_STATE:
1161 case ACCESS_GET_TITLE_INFO:
1162 case ACCESS_SET_TITLE:
1163 case ACCESS_SET_SEEKPOINT:
1164 case ACCESS_SET_PRIVATE_ID_STATE:
1165 case ACCESS_GET_CONTENT_TYPE:
1166 case ACCESS_GET_META:
1167 return VLC_EGENERIC;
1170 msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1171 return VLC_EGENERIC;
1177 /*****************************************************************************
1178 * AccessRead: access callback
1179 ******************************************************************************/
1180 static ssize_t AccessRead( access_t * p_access, uint8_t * p_buffer, size_t i_len )
1182 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1186 ufd.fd = p_sys->i_fd;
1187 ufd.events = POLLIN;
1189 if( p_access->info.b_eof )
1194 if( !vlc_object_alive (p_access) )
1199 while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
1203 msg_Err( p_access, "Polling error (%m)." );
1207 i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
1210 p_access->info.b_eof = true;
1212 else if( i_ret > 0 )
1214 p_access->info.i_pos += i_ret;
1220 /*****************************************************************************
1221 * Demux: Processes the audio or video frame
1222 *****************************************************************************/
1223 static int Demux( demux_t *p_demux )
1225 demux_sys_t *p_sys = p_demux->p_sys;
1228 fd.fd = p_sys->i_fd;
1229 fd.events = POLLIN|POLLPRI;
1233 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1235 if( fd.revents & (POLLIN|POLLPRI) )
1237 block_t *p_block = GrabVideo( p_demux );
1240 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1241 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1249 /*****************************************************************************
1250 * GrabVideo: Grab a video frame
1251 *****************************************************************************/
1252 static block_t* GrabVideo( demux_t *p_demux )
1254 demux_sys_t *p_sys = p_demux->p_sys;
1256 block_t *p_block = NULL;
1257 struct v4l2_buffer buf;
1260 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1262 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1264 /* Did we wait long enough ? (frame rate reduction) */
1265 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1268 /* Grab Video Frame */
1271 case IO_METHOD_READ:
1272 i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1280 /* Could ignore EIO, see spec. */
1283 msg_Err( p_demux, "Failed to read frame" );
1288 p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1289 if( !p_block ) return 0;
1293 case IO_METHOD_MMAP:
1294 memset( &buf, 0, sizeof(buf) );
1295 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1296 buf.memory = V4L2_MEMORY_MMAP;
1298 /* Wait for next frame */
1299 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1306 /* Could ignore EIO, see spec. */
1309 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1314 if( buf.index >= p_sys->i_nbuffers ) {
1315 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1319 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1320 if( !p_block ) return 0;
1323 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1325 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1326 block_Release( p_block );
1332 case IO_METHOD_USERPTR:
1333 memset( &buf, 0, sizeof(buf) );
1334 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1335 buf.memory = V4L2_MEMORY_USERPTR;
1337 /* Wait for next frame */
1338 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1345 /* Could ignore EIO, see spec. */
1348 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1355 for( i = 0; i < p_sys->i_nbuffers; i++ )
1357 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1358 buf.length == p_sys->p_buffers[i].length ) break;
1361 if( i >= p_sys->i_nbuffers )
1363 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1367 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1368 if( !p_block ) return 0;
1371 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1373 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1374 block_Release( p_block );
1383 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1388 /*****************************************************************************
1389 * ProcessVideoFrame: Helper function to take a buffer and copy it into
1391 *****************************************************************************/
1392 static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame, size_t i_size )
1396 if( !p_frame ) return 0;
1399 if( !( p_block = block_New( p_demux, i_size ) ) )
1401 msg_Warn( p_demux, "Cannot get new block" );
1406 memcpy( p_block->p_buffer, p_frame, i_size );
1411 /*****************************************************************************
1412 * Helper function to initalise video IO using the Read method
1413 *****************************************************************************/
1414 static int InitRead( demux_t *p_demux, unsigned int i_buffer_size )
1416 demux_sys_t *p_sys = p_demux->p_sys;
1418 p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1419 if( !p_sys->p_buffers )
1420 return VLC_EGENERIC;
1422 p_sys->p_buffers[0].length = i_buffer_size;
1423 p_sys->p_buffers[0].start = malloc( i_buffer_size );
1424 if( !p_sys->p_buffers[0].start )
1430 /*****************************************************************************
1431 * Helper function to initalise video IO using the mmap method
1432 *****************************************************************************/
1433 static int InitMmap( demux_t *p_demux, int i_fd )
1435 demux_sys_t *p_sys = p_demux->p_sys;
1436 struct v4l2_requestbuffers req;
1438 memset( &req, 0, sizeof(req) );
1440 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1441 req.memory = V4L2_MEMORY_MMAP;
1443 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1445 msg_Err( p_demux, "device does not support mmap i/o" );
1451 msg_Err( p_demux, "Insufficient buffer memory" );
1455 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1456 if( !p_sys->p_buffers )
1459 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1461 struct v4l2_buffer buf;
1463 memset( &buf, 0, sizeof(buf) );
1464 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1465 buf.memory = V4L2_MEMORY_MMAP;
1466 buf.index = p_sys->i_nbuffers;
1468 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1470 msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1474 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1475 p_sys->p_buffers[p_sys->i_nbuffers].start =
1476 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1478 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1480 msg_Err( p_demux, "mmap failed (%m)" );
1488 return VLC_EGENERIC;
1492 /*****************************************************************************
1493 * Helper function to initalise video IO using the userbuf method
1494 *****************************************************************************/
1495 static int InitUserP( demux_t *p_demux, int i_fd, unsigned int i_buffer_size )
1497 demux_sys_t *p_sys = p_demux->p_sys;
1498 struct v4l2_requestbuffers req;
1499 unsigned int i_page_size;
1501 i_page_size = sysconf(_SC_PAGESIZE);
1502 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1504 memset( &req, 0, sizeof(req) );
1506 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1507 req.memory = V4L2_MEMORY_USERPTR;
1509 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1511 msg_Err( p_demux, "device does not support user pointer i/o" );
1512 return VLC_EGENERIC;
1515 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1516 if( !p_sys->p_buffers )
1519 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1521 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1522 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1523 /* boundary */ i_page_size, i_buffer_size ) )
1530 free( p_sys->p_buffers );
1531 return VLC_EGENERIC;
1535 /*****************************************************************************
1536 * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1537 * in the array of supported formats returned by the driver
1538 *****************************************************************************/
1539 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1541 demux_sys_t *p_sys = p_demux->p_sys;
1543 for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1545 if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1552 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1553 uint32_t i_pixel_format,
1554 uint32_t i_width, uint32_t i_height )
1557 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1559 demux_sys_t *p_sys = p_demux->p_sys;
1561 /* This is new in Linux 2.6.19 */
1562 struct v4l2_frmivalenum frmival;
1563 memset( &frmival, 0, sizeof(frmival) );
1564 frmival.pixel_format = i_pixel_format;
1565 frmival.width = i_width;
1566 frmival.height = i_height;
1567 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1569 switch( frmival.type )
1571 case V4L2_FRMIVAL_TYPE_DISCRETE:
1573 float f_fps_max = -1;
1576 float f_fps = (float)frmival.discrete.denominator
1577 / (float)frmival.discrete.numerator;
1578 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1580 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1584 case V4L2_FRMSIZE_TYPE_STEPWISE:
1585 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1586 return __MAX( (float)frmival.stepwise.max.denominator
1587 / (float)frmival.stepwise.max.numerator,
1588 (float)frmival.stepwise.min.denominator
1589 / (float)frmival.stepwise.min.numerator );
1596 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1597 uint32_t i_pixel_format )
1599 float f_fps_max = -1.;
1600 #ifdef VIDIOC_ENUM_FRAMESIZES
1602 demux_sys_t *p_sys = p_demux->p_sys;
1604 /* This is new in Linux 2.6.19 */
1605 struct v4l2_frmsizeenum frmsize;
1606 memset( &frmsize, 0, sizeof(frmsize) );
1607 frmsize.pixel_format = i_pixel_format;
1608 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1610 switch( frmsize.type )
1612 case V4L2_FRMSIZE_TYPE_DISCRETE:
1616 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1618 frmsize.discrete.width,
1619 frmsize.discrete.height );
1620 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1621 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1624 case V4L2_FRMSIZE_TYPE_STEPWISE:
1626 uint32_t i_width = frmsize.stepwise.min_width;
1627 uint32_t i_height = frmsize.stepwise.min_height;
1629 i_width <= frmsize.stepwise.max_width &&
1630 i_height <= frmsize.stepwise.max_width;
1631 i_width += frmsize.stepwise.step_width,
1632 i_height += frmsize.stepwise.step_height )
1634 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1636 i_width, i_height );
1637 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1641 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1643 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1644 f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1646 frmsize.stepwise.max_width,
1647 frmsize.stepwise.max_height );
1655 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1656 uint32_t i_pixel_format, float f_fps_min,
1657 uint32_t *pi_width, uint32_t *pi_height )
1661 #ifdef VIDIOC_ENUM_FRAMESIZES
1663 demux_sys_t *p_sys = p_demux->p_sys;
1665 /* This is new in Linux 2.6.19 */
1666 struct v4l2_frmsizeenum frmsize;
1667 memset( &frmsize, 0, sizeof(frmsize) );
1668 frmsize.pixel_format = i_pixel_format;
1669 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1671 switch( frmsize.type )
1673 case V4L2_FRMSIZE_TYPE_DISCRETE:
1677 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1679 frmsize.discrete.width,
1680 frmsize.discrete.height );
1681 if( f_fps >= f_fps_min &&
1682 frmsize.discrete.width > *pi_width )
1684 *pi_width = frmsize.discrete.width;
1685 *pi_height = frmsize.discrete.height;
1687 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1690 case V4L2_FRMSIZE_TYPE_STEPWISE:
1692 uint32_t i_width = frmsize.stepwise.min_width;
1693 uint32_t i_height = frmsize.stepwise.min_height;
1695 i_width <= frmsize.stepwise.max_width &&
1696 i_height <= frmsize.stepwise.max_width;
1697 i_width += frmsize.stepwise.step_width,
1698 i_height += frmsize.stepwise.step_height )
1700 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1702 i_width, i_height );
1703 if( f_fps >= f_fps_min && i_width > *pi_width )
1705 *pi_width = i_width;
1706 *pi_height = i_height;
1711 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1713 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1714 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1716 frmsize.stepwise.max_width,
1717 frmsize.stepwise.max_height );
1718 if( f_fps >= f_fps_min &&
1719 frmsize.stepwise.max_width > *pi_width )
1721 *pi_width = frmsize.stepwise.max_width;
1722 *pi_height = frmsize.stepwise.max_height;
1730 /*****************************************************************************
1731 * OpenVideoDev: open and set up the video device and probe for capabilities
1732 *****************************************************************************/
1733 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1736 struct v4l2_cropcap cropcap;
1737 struct v4l2_crop crop;
1738 struct v4l2_format fmt;
1740 enum v4l2_buf_type buf_type;
1741 const char *psz_device = p_sys->psz_device;
1744 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
1746 msg_Err( p_obj, "cannot open device (%m)" );
1751 /* Note the v4l2_xxx functions are designed so that if they get passed an
1752 unknown fd, the will behave exactly as their regular xxx counterparts,
1753 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1754 custom cam format to normal formats conversion). Chances are big we will
1755 still fail then though, as normally v4l2_fd_open only fails if the
1756 device is not a v4l2 device. */
1757 if( p_sys->b_libv4l2 )
1760 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1761 if( libv4l2_fd != -1 )
1766 /* Tune the tuner */
1767 if( p_sys->i_frequency >= 0 )
1769 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1771 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1774 struct v4l2_frequency frequency;
1775 memset( &frequency, 0, sizeof( frequency ) );
1776 frequency.tuner = p_sys->i_cur_tuner;
1777 frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1778 frequency.frequency = p_sys->i_frequency / 62.5;
1779 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1781 msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1784 msg_Dbg( p_obj, "Tuner frequency set" );
1787 /* Set the tuner's audio mode */
1788 if( p_sys->i_audio_mode >= 0 )
1790 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1792 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1795 struct v4l2_tuner tuner;
1796 memset( &tuner, 0, sizeof( tuner ) );
1797 tuner.index = p_sys->i_cur_tuner;
1798 tuner.audmode = p_sys->i_audio_mode;
1799 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1801 msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1804 msg_Dbg( p_obj, "Tuner audio mode set" );
1807 /* Select standard */
1809 if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1811 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1813 msg_Err( p_obj, "cannot set standard (%m)" );
1816 msg_Dbg( p_obj, "Set standard" );
1821 if( p_sys->i_selected_input >= p_sys->i_input )
1823 msg_Warn( p_obj, "invalid input. Using the default one" );
1824 p_sys->i_selected_input = 0;
1827 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1829 msg_Err( p_obj, "cannot set input (%m)" );
1833 /* Set audio input */
1835 if( p_sys->i_audio > 0 )
1837 if( p_sys->i_selected_audio_input < 0
1838 || p_sys->i_selected_audio_input >= p_sys->i_audio )
1840 msg_Warn( p_obj, "invalid audio input. Using the default one" );
1841 p_sys->i_selected_audio_input = 0;
1844 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1846 msg_Err( p_obj, "cannot set audio input (%m)" );
1849 msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1853 /* TODO: Move the resolution stuff up here */
1854 /* if MPEG encoder card, no need to do anything else after this */
1855 ControlList( p_obj, p_sys, i_fd,
1856 var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1857 SetAvailControlsByString( p_obj, p_sys, i_fd );
1859 if( false == b_demux)
1864 demux_t *p_demux = (demux_t *) p_obj;
1866 /* Verify device support for the various IO methods */
1869 case IO_METHOD_READ:
1870 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1872 msg_Err( p_obj, "device does not support read i/o" );
1877 case IO_METHOD_MMAP:
1878 case IO_METHOD_USERPTR:
1879 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1881 msg_Err( p_obj, "device does not support streaming i/o" );
1887 msg_Err( p_obj, "io method not supported" );
1891 /* Reset Cropping */
1892 memset( &cropcap, 0, sizeof(cropcap) );
1893 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1894 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1896 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1897 crop.c = cropcap.defrect; /* reset to default */
1898 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1903 /* Cropping not supported. */
1906 /* Errors ignored. */
1912 /* Try and find default resolution if not specified */
1913 memset( &fmt, 0, sizeof(fmt) );
1914 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1916 if( p_sys->i_width == 0 || p_sys->i_height == 0 )
1918 /* Use current width and height settings */
1919 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
1921 msg_Err( p_demux, "Cannot get default width and height." );
1925 p_sys->i_width = fmt.fmt.pix.width;
1926 p_sys->i_height = fmt.fmt.pix.height;
1928 if( fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE )
1930 p_sys->i_height = p_sys->i_height * 2;
1933 else if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1935 msg_Dbg( p_demux, "will try to find optimal width and height." );
1939 /* Use user specified width and height */
1940 msg_Dbg( p_demux, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
1943 fmt.fmt.pix.width = p_sys->i_width;
1944 fmt.fmt.pix.height = p_sys->i_height;
1945 fmt.fmt.pix.field = V4L2_FIELD_NONE;
1947 /* Test and set Chroma */
1948 fmt.fmt.pix.pixelformat = 0;
1949 if( p_sys->psz_requested_chroma && strlen( p_sys->psz_requested_chroma ) > 0 )
1951 /* User specified chroma */
1952 if( strlen( p_sys->psz_requested_chroma ) >= 4 )
1954 int i_requested_fourcc = VLC_FOURCC(
1955 p_sys->psz_requested_chroma[0], p_sys->psz_requested_chroma[1],
1956 p_sys->psz_requested_chroma[2], p_sys->psz_requested_chroma[3] );
1957 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
1959 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
1961 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
1966 /* Try and set user chroma */
1967 if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ( fmt.fmt.pix.pixelformat && v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) )
1969 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
1970 fmt.fmt.pix.pixelformat = 0;
1974 /* If no user specified chroma, find best */
1975 /* This also decides if MPEG encoder card or not */
1976 if( !fmt.fmt.pix.pixelformat )
1979 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
1981 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
1982 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat )
1983 && v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
1986 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
1988 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
1993 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
1995 if( p_sys->f_fps <= 0 )
1997 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
1998 fmt.fmt.pix.pixelformat );
1999 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
2001 GetMaxDimensions( p_demux, i_fd,
2002 fmt.fmt.pix.pixelformat, p_sys->f_fps,
2003 &fmt.fmt.pix.width, &fmt.fmt.pix.height );
2004 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f of %dx%d",
2005 p_sys->f_fps, fmt.fmt.pix.width, fmt.fmt.pix.height );
2006 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) {;}
2009 /* Reassign width, height and chroma incase driver override */
2010 p_sys->i_width = fmt.fmt.pix.width;
2011 p_sys->i_height = fmt.fmt.pix.height;
2013 /* Check interlacing */
2014 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
2015 switch( fmt.fmt.pix.field )
2017 case V4L2_FIELD_NONE:
2018 msg_Dbg( p_demux, "Interlacing setting: progressive" );
2020 case V4L2_FIELD_TOP:
2021 msg_Dbg( p_demux, "Interlacing setting: top field only" );
2023 case V4L2_FIELD_BOTTOM:
2024 msg_Dbg( p_demux, "Interlacing setting: bottom field only" );
2026 case V4L2_FIELD_INTERLACED:
2027 msg_Dbg( p_demux, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2029 case V4L2_FIELD_SEQ_TB:
2030 msg_Dbg( p_demux, "Interlacing setting: sequential top bottom" );
2032 case V4L2_FIELD_SEQ_BT:
2033 msg_Dbg( p_demux, "Interlacing setting: sequential bottom top" );
2035 case V4L2_FIELD_ALTERNATE:
2036 msg_Dbg( p_demux, "Interlacing setting: alternate fields" );
2038 case V4L2_FIELD_INTERLACED_TB:
2039 msg_Dbg( p_demux, "Interlacing setting: interleaved top bottom" );
2041 case V4L2_FIELD_INTERLACED_BT:
2042 msg_Dbg( p_demux, "Interlacing setting: interleaved bottom top" );
2045 msg_Warn( p_demux, "Interlacing setting: unknown type (%d)",
2046 fmt.fmt.pix.field );
2049 if( fmt.fmt.pix.field != V4L2_FIELD_NONE )
2050 msg_Warn( p_demux, "Interlaced inputs haven't been tested. Please report any issue." );
2052 /* Look up final fourcc */
2053 p_sys->i_fourcc = 0;
2054 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2056 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2058 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2059 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2060 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2061 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2062 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2067 /* Buggy driver paranoia */
2068 i_min = fmt.fmt.pix.width * 2;
2069 if( fmt.fmt.pix.bytesperline < i_min )
2070 fmt.fmt.pix.bytesperline = i_min;
2071 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2072 if( fmt.fmt.pix.sizeimage < i_min )
2073 fmt.fmt.pix.sizeimage = i_min;
2075 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2076 /* This is new in Linux 2.6.19 */
2077 /* List supported frame rates */
2078 struct v4l2_frmivalenum frmival;
2079 memset( &frmival, 0, sizeof(frmival) );
2080 frmival.pixel_format = fmt.fmt.pix.pixelformat;
2081 frmival.width = p_sys->i_width;
2082 frmival.height = p_sys->i_height;
2083 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2086 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2087 vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2088 msg_Dbg( p_demux, "supported frame intervals for %4s, %dx%d:",
2089 psz_fourcc, frmival.width, frmival.height );
2090 switch( frmival.type )
2092 case V4L2_FRMIVAL_TYPE_DISCRETE:
2095 msg_Dbg( p_demux, " supported frame interval: %d/%d",
2096 frmival.discrete.numerator,
2097 frmival.discrete.denominator );
2099 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2101 case V4L2_FRMIVAL_TYPE_STEPWISE:
2102 msg_Dbg( p_demux, " supported frame intervals: %d/%d to "
2103 "%d/%d using %d/%d increments",
2104 frmival.stepwise.min.numerator,
2105 frmival.stepwise.min.denominator,
2106 frmival.stepwise.max.numerator,
2107 frmival.stepwise.max.denominator,
2108 frmival.stepwise.step.numerator,
2109 frmival.stepwise.step.denominator );
2111 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2112 msg_Dbg( p_demux, " supported frame intervals: %d/%d to %d/%d",
2113 frmival.stepwise.min.numerator,
2114 frmival.stepwise.min.denominator,
2115 frmival.stepwise.max.numerator,
2116 frmival.stepwise.max.denominator );
2123 /* Init IO method */
2126 case IO_METHOD_READ:
2127 if( InitRead( p_demux, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2130 case IO_METHOD_MMAP:
2131 if( InitMmap( p_demux, i_fd ) != VLC_SUCCESS ) goto open_failed;
2134 case IO_METHOD_USERPTR:
2135 if( InitUserP( p_demux, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2141 es_fmt.video.i_width = p_sys->i_width;
2142 es_fmt.video.i_height = p_sys->i_height;
2143 es_fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
2145 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2146 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2147 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2153 case IO_METHOD_READ:
2157 case IO_METHOD_MMAP:
2158 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2160 struct v4l2_buffer buf;
2162 memset( &buf, 0, sizeof(buf) );
2163 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2164 buf.memory = V4L2_MEMORY_MMAP;
2167 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2169 msg_Err( p_demux, "VIDIOC_QBUF failed" );
2174 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2175 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2177 msg_Err( p_demux, "VIDIOC_STREAMON failed" );
2183 case IO_METHOD_USERPTR:
2184 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2186 struct v4l2_buffer buf;
2188 memset( &buf, 0, sizeof(buf) );
2189 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2190 buf.memory = V4L2_MEMORY_USERPTR;
2192 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2193 buf.length = p_sys->p_buffers[i].length;
2195 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2197 msg_Err( p_demux, "VIDIOC_QBUF failed" );
2202 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2203 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2205 msg_Err( p_demux, "VIDIOC_STREAMON failed" );
2213 if( p_sys->f_fps >= 0.1 )
2215 msg_Dbg( p_demux, "User set fps=%f", p_sys->f_fps );
2221 if( i_fd >= 0 ) v4l2_close( i_fd );
2226 /*****************************************************************************
2227 * ProbeVideoDev: probe video for capabilities
2228 *****************************************************************************/
2229 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2230 const char *psz_device )
2237 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
2239 msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2244 /* Note the v4l2_xxx functions are designed so that if they get passed an
2245 unknown fd, the will behave exactly as their regular xxx counterparts,
2246 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2247 custom cam format to normal formats conversion). Chances are big we will
2248 still fail then though, as normally v4l2_fd_open only fails if the
2249 device is not a v4l2 device. */
2250 if( p_sys->b_libv4l2 )
2253 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2254 if( libv4l2_fd != -1 )
2259 /* Get device capabilites */
2261 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2263 msg_Err( p_obj, "cannot get video capabilities (%m)" );
2267 msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2268 p_sys->dev_cap.card,
2269 p_sys->dev_cap.driver,
2270 (p_sys->dev_cap.version >> 16) & 0xFF,
2271 (p_sys->dev_cap.version >> 8) & 0xFF,
2272 p_sys->dev_cap.version & 0xFF,
2273 p_sys->dev_cap.bus_info );
2275 msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capure, "
2278 ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
2279 ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
2280 ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' ') );
2282 msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2284 "(%c) Asynchronous",
2285 ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2286 ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2287 ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2289 /* Now, enumerate all the video inputs. This is useless at the moment
2290 since we have no way to present that info to the user except with
2293 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2295 struct v4l2_input t_input;
2296 memset( &t_input, 0, sizeof(t_input) );
2297 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2300 t_input.index = p_sys->i_input;
2303 p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2304 if( !p_sys->p_inputs ) goto open_failed;
2306 for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2308 p_sys->p_inputs[i_index].index = i_index;
2310 if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2312 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2315 msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2317 p_sys->p_inputs[i_index].name,
2318 p_sys->p_inputs[i_index].type
2319 == V4L2_INPUT_TYPE_TUNER ?
2321 "External analog input",
2322 i_index == p_sys->i_selected_input ? '*' : ' ' );
2326 /* Probe video standards */
2327 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2329 struct v4l2_standard t_standards;
2330 t_standards.index = 0;
2331 while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2333 p_sys->i_standard++;
2334 t_standards.index = p_sys->i_standard;
2337 p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2338 if( !p_sys->p_standards ) goto open_failed;
2340 for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2342 p_sys->p_standards[i_standard].index = i_standard;
2344 if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2346 msg_Err( p_obj, "cannot get video input standards (%m)" );
2349 msg_Dbg( p_obj, "video standard %i is: %s %c",
2351 p_sys->p_standards[i_standard].name,
2352 (unsigned)i_standard == p_sys->i_selected_standard_id ? '*' : ' ' );
2356 /* initialize the structures for the ioctls */
2357 for( i_index = 0; i_index < 32; i_index++ )
2359 p_sys->p_audios[i_index].index = i_index;
2362 /* Probe audio inputs */
2363 if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2365 while( p_sys->i_audio < 32 &&
2366 v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2368 if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2370 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2374 msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2376 p_sys->p_audios[p_sys->i_audio].name,
2377 p_sys->p_audios[p_sys->i_audio].capability &
2378 V4L2_AUDCAP_STEREO ?
2380 p_sys->p_audios[p_sys->i_audio].capability &
2382 "(Automatic Volume Level supported)" : "",
2383 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2389 /* List tuner caps */
2390 if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2392 struct v4l2_tuner tuner;
2393 memset( &tuner, 0, sizeof(tuner) );
2394 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2397 memset( &tuner, 0, sizeof(tuner) );
2398 tuner.index = p_sys->i_tuner;
2401 p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2402 if( !p_sys->p_tuners ) goto open_failed;
2404 for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2406 p_sys->p_tuners[i_index].index = i_index;
2408 if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2410 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2413 msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2414 "frequency range: %.1f %s -> %.1f %s",
2416 p_sys->p_tuners[i_index].name,
2417 p_sys->p_tuners[i_index].type
2418 == V4L2_TUNER_RADIO ?
2419 "Radio" : "Analog TV",
2420 p_sys->p_tuners[i_index].rangelow * 62.5,
2421 p_sys->p_tuners[i_index].capability &
2422 V4L2_TUNER_CAP_LOW ?
2424 p_sys->p_tuners[i_index].rangehigh * 62.5,
2425 p_sys->p_tuners[i_index].capability &
2426 V4L2_TUNER_CAP_LOW ?
2429 struct v4l2_frequency frequency;
2430 memset( &frequency, 0, sizeof( frequency ) );
2431 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2433 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2436 msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2438 p_sys->p_tuners[i_index].name,
2439 frequency.frequency * 62.5,
2440 p_sys->p_tuners[i_index].capability &
2441 V4L2_TUNER_CAP_LOW ?
2446 /* Probe for available chromas */
2447 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2449 struct v4l2_fmtdesc codec;
2452 memset( &codec, 0, sizeof(codec) );
2453 codec.index = i_index;
2454 codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2456 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2459 codec.index = i_index;
2462 p_sys->i_codec = i_index;
2464 p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2466 for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2468 p_sys->p_codecs[i_index].index = i_index;
2469 p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2471 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2473 msg_Err( p_obj, "cannot get codec description (%m)" );
2477 /* only print if vlc supports the format */
2478 char psz_fourcc_v4l2[5];
2479 memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2480 vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2482 bool b_codec_supported = false;
2483 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2485 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2487 b_codec_supported = true;
2490 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2491 vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2493 msg_Dbg( p_obj, "device supports chroma %4s [%s, %s]",
2495 p_sys->p_codecs[i_index].description,
2498 #ifdef VIDIOC_ENUM_FRAMESIZES
2499 /* This is new in Linux 2.6.19 */
2500 /* List valid frame sizes for this format */
2501 struct v4l2_frmsizeenum frmsize;
2502 memset( &frmsize, 0, sizeof(frmsize) );
2503 frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2504 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2506 /* Not all devices support this ioctl */
2507 msg_Warn( p_obj, "Unable to query for frame sizes" );
2511 switch( frmsize.type )
2513 case V4L2_FRMSIZE_TYPE_DISCRETE:
2517 " device supports size %dx%d",
2518 frmsize.discrete.width, frmsize.discrete.height );
2520 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2522 case V4L2_FRMSIZE_TYPE_STEPWISE:
2524 " device supports sizes %dx%d to %dx%d using %dx%d increments",
2525 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2526 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2527 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2529 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2531 " device supports all sizes %dx%d to %dx%d",
2532 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2533 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2540 if( !b_codec_supported )
2543 "device codec %4s (%s) not supported",
2545 p_sys->p_codecs[i_index].description );
2551 if( i_fd >= 0 ) v4l2_close( i_fd );
2556 if( i_fd >= 0 ) v4l2_close( i_fd );
2561 static void name2var( unsigned char *name )
2563 for( ; *name; name++ )
2564 *name = (*name == ' ') ? '_' : tolower( *name );
2567 /*****************************************************************************
2568 * Print a user-class v4l2 control's details, create the relevant variable,
2569 * change the value if needed.
2570 *****************************************************************************/
2571 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2572 struct v4l2_queryctrl queryctrl,
2573 bool b_reset, bool b_demux )
2575 struct v4l2_querymenu querymenu;
2582 vlc_value_t val, val2;
2584 if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2585 msg_Dbg( p_obj, " control is busy" );
2586 if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2587 msg_Dbg( p_obj, " control is read-only" );
2589 for( i = 0; controls[i].psz_name != NULL; i++ )
2590 if( controls[i].i_cid == queryctrl.id ) break;
2592 if( controls[i].psz_name )
2594 psz_name = strdup( controls[i].psz_name );
2595 char psz_cfg_name[40];
2596 sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2597 i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2598 var_Destroy( p_obj, psz_cfg_name );
2602 psz_name = strdup( (const char *)queryctrl.name );
2603 name2var( (unsigned char *)psz_name );
2607 switch( queryctrl.type )
2609 case V4L2_CTRL_TYPE_INTEGER:
2610 msg_Dbg( p_obj, " integer control" );
2612 " valid values: %d to %d by steps of %d",
2613 queryctrl.minimum, queryctrl.maximum,
2616 var_Create( p_obj, psz_name,
2617 VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2618 | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2619 val.i_int = queryctrl.minimum;
2620 var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2621 val.i_int = queryctrl.maximum;
2622 var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2623 val.i_int = queryctrl.step;
2624 var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2626 case V4L2_CTRL_TYPE_BOOLEAN:
2627 msg_Dbg( p_obj, " boolean control" );
2628 var_Create( p_obj, psz_name,
2629 VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2631 case V4L2_CTRL_TYPE_MENU:
2632 msg_Dbg( p_obj, " menu control" );
2633 var_Create( p_obj, psz_name,
2634 VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2635 | VLC_VAR_ISCOMMAND );
2636 memset( &querymenu, 0, sizeof( querymenu ) );
2637 for( i_mid = queryctrl.minimum;
2638 i_mid <= (unsigned)queryctrl.maximum;
2641 querymenu.index = i_mid;
2642 querymenu.id = queryctrl.id;
2643 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2645 msg_Dbg( p_obj, " %d: %s",
2646 querymenu.index, querymenu.name );
2647 val.i_int = querymenu.index;
2648 val2.psz_string = (char *)querymenu.name;
2649 var_Change( p_obj, psz_name,
2650 VLC_VAR_ADDCHOICE, &val, &val2 );
2654 case V4L2_CTRL_TYPE_BUTTON:
2655 msg_Dbg( p_obj, " button control" );
2656 var_Create( p_obj, psz_name,
2657 VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2659 case V4L2_CTRL_TYPE_CTRL_CLASS:
2660 msg_Dbg( p_obj, " control class" );
2661 var_Create( p_obj, psz_name, VLC_VAR_VOID );
2664 msg_Dbg( p_obj, " unknown control type (FIXME)" );
2669 switch( queryctrl.type )
2671 case V4L2_CTRL_TYPE_INTEGER:
2672 case V4L2_CTRL_TYPE_BOOLEAN:
2673 case V4L2_CTRL_TYPE_MENU:
2675 struct v4l2_control control;
2676 msg_Dbg( p_obj, " default value: %d",
2677 queryctrl.default_value );
2678 memset( &control, 0, sizeof( control ) );
2679 control.id = queryctrl.id;
2680 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2682 msg_Dbg( p_obj, " current value: %d", control.value );
2686 i_val = control.value;
2687 if( b_reset && queryctrl.default_value != control.value )
2689 msg_Dbg( p_obj, " reset value to default" );
2690 Control( p_obj, p_sys, i_fd, psz_name,
2691 queryctrl.id, queryctrl.default_value );
2696 Control( p_obj, p_sys, i_fd, psz_name,
2697 queryctrl.id, i_val );
2705 val.psz_string = (char *)queryctrl.name;
2706 var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2707 val.i_int = queryctrl.id;
2708 val2.psz_string = (char *)psz_name;
2709 var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2710 /* bad things happen changing MPEG mid-stream
2711 * so don't add to Ext Settings GUI */
2712 if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2713 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2715 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2718 var_SetBool( p_obj, psz_name, i_val );
2720 case VLC_VAR_INTEGER:
2721 var_SetInteger( p_obj, psz_name, i_val );
2726 msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2732 var_AddCallback( p_obj, psz_name,
2733 DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2735 var_AddCallback( p_obj, psz_name,
2736 AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2741 /*****************************************************************************
2742 * List all user-class v4l2 controls, set them to the user specified
2743 * value and create the relevant variables to enable runtime changes
2744 *****************************************************************************/
2745 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2746 bool b_reset, bool b_demux )
2748 struct v4l2_queryctrl queryctrl;
2751 memset( &queryctrl, 0, sizeof( queryctrl ) );
2753 /* A list of available controls (aka the variable name) will be
2754 * stored as choices in the "allcontrols" variable. We'll thus be able
2755 * to use those to create an appropriate interface
2756 * A list of available controls that can be changed mid-stream will
2757 * be stored in the "controls" variable */
2758 var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2759 var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2761 var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2763 /* Add a control to reset all controls to their default values */
2764 vlc_value_t val, val2;
2765 var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2766 val.psz_string = _( "Reset controls to default" );
2767 var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2769 val2.psz_string = (char *)"controls-reset";
2770 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2772 var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2774 var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2776 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2777 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2779 msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2781 /* List extended controls */
2782 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2783 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2785 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2787 msg_Dbg( p_obj, "%s", queryctrl.name );
2788 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2791 switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2793 case V4L2_CTRL_CLASS_USER:
2794 msg_Dbg( p_obj, "Available control: %s (%x)",
2795 queryctrl.name, queryctrl.id );
2797 case V4L2_CTRL_CLASS_MPEG:
2798 name2var( queryctrl.name );
2799 msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2800 queryctrl.name, queryctrl.id );
2803 msg_Dbg( p_obj, "Available private control: %s (%x)",
2804 queryctrl.name, queryctrl.id );
2807 ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
2808 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2813 msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
2815 /* List public controls */
2816 for( i_cid = V4L2_CID_BASE;
2817 i_cid < V4L2_CID_LASTP1;
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 control: %s (%x)",
2826 queryctrl.name, queryctrl.id );
2827 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2832 /* List private controls */
2833 for( i_cid = V4L2_CID_PRIVATE_BASE;
2837 queryctrl.id = i_cid;
2838 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2840 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2842 msg_Dbg( p_obj, "Available private control: %s (%x)",
2843 queryctrl.name, queryctrl.id );
2844 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
2855 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
2858 char *psz_parser = p_sys->psz_set_ctrls;
2859 vlc_value_t val, text, name;
2861 if( psz_parser == NULL )
2864 if( *psz_parser == '{' )
2867 int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
2871 msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
2875 while( *psz_parser && *psz_parser != '}' )
2877 char *psz_delim, *psz_assign;
2879 while( *psz_parser == ',' || *psz_parser == ' ' )
2882 psz_delim = strchr( psz_parser, ',' );
2883 if( psz_delim == NULL )
2884 psz_delim = strchr( psz_parser, '}' );
2885 if( psz_delim == NULL )
2886 psz_delim = psz_parser + strlen( psz_parser );
2888 psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
2889 if( psz_assign == NULL )
2891 char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
2892 msg_Err( p_obj, "%s missing '='", psz_name );
2894 psz_parser = psz_delim + 1;
2899 i < val.p_list->i_count ;//&& psz_parser < psz_assign;
2902 const char *psz_var = text.p_list->p_values[i].psz_string;
2903 int i_cid = val.p_list->p_values[i].i_int;
2904 var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
2905 const char *psz_name = name.psz_string;
2907 int i_availstrlen = strlen( psz_name );
2908 int i_parsestrlen = psz_assign - psz_parser;
2909 int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
2911 if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
2913 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
2914 strtol( ++psz_assign, &psz_parser, 0) );
2918 if( psz_parser < psz_assign )
2920 char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
2921 msg_Err( p_obj, "Control %s not available", psz_name );
2923 psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
2928 /*****************************************************************************
2929 * Reset all user-class v4l2 controls to their default value
2930 *****************************************************************************/
2931 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
2933 struct v4l2_queryctrl queryctrl;
2935 memset( &queryctrl, 0, sizeof( queryctrl ) );
2937 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2938 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2940 /* Extended control API supported */
2941 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2942 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2944 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
2945 || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
2947 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2950 struct v4l2_control control;
2951 memset( &control, 0, sizeof( control ) );
2952 control.id = queryctrl.id;
2953 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2954 && queryctrl.default_value != control.value )
2957 for( i = 0; controls[i].psz_name != NULL; i++ )
2958 if( controls[i].i_cid == queryctrl.id ) break;
2959 name2var( queryctrl.name );
2960 Control( p_obj, p_sys, i_fd,
2961 controls[i].psz_name ? controls[i].psz_name
2962 : (const char *)queryctrl.name,
2963 queryctrl.id, queryctrl.default_value );
2965 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2971 /* public controls */
2972 for( i_cid = V4L2_CID_BASE;
2973 i_cid < V4L2_CID_LASTP1;
2976 queryctrl.id = i_cid;
2977 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2979 struct v4l2_control control;
2980 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
2982 memset( &control, 0, sizeof( control ) );
2983 control.id = queryctrl.id;
2984 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
2985 && queryctrl.default_value != control.value )
2988 for( i = 0; controls[i].psz_name != NULL; i++ )
2989 if( controls[i].i_cid == queryctrl.id ) break;
2990 name2var( queryctrl.name );
2991 Control( p_obj, p_sys, i_fd,
2992 controls[i].psz_name ? controls[i].psz_name
2993 : (const char *)queryctrl.name,
2994 queryctrl.id, queryctrl.default_value );
2999 /* private controls */
3000 for( i_cid = V4L2_CID_PRIVATE_BASE;
3004 queryctrl.id = i_cid;
3005 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3007 struct v4l2_control control;
3008 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3010 memset( &control, 0, sizeof( control ) );
3011 control.id = queryctrl.id;
3012 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3013 && queryctrl.default_value != control.value )
3015 name2var( queryctrl.name );
3016 Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3017 queryctrl.id, queryctrl.default_value );
3027 /*****************************************************************************
3028 * Issue user-class v4l2 controls
3029 *****************************************************************************/
3030 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3031 const char *psz_name, int i_cid, int i_value )
3034 struct v4l2_queryctrl queryctrl;
3035 struct v4l2_control control;
3036 struct v4l2_ext_control ext_control;
3037 struct v4l2_ext_controls ext_controls;
3042 memset( &queryctrl, 0, sizeof( queryctrl ) );
3044 queryctrl.id = i_cid;
3046 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3047 || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3049 msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3050 return VLC_EGENERIC;
3053 memset( &control, 0, sizeof( control ) );
3054 memset( &ext_control, 0, sizeof( ext_control ) );
3055 memset( &ext_controls, 0, sizeof( ext_controls ) );
3057 ext_control.id = i_cid;
3058 ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3059 ext_controls.count = 1;
3060 ext_controls.controls = &ext_control;
3064 if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3066 ext_control.value = i_value;
3067 if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3069 control.value = i_value;
3070 if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3072 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3073 psz_name, i_cid, i_value );
3074 return VLC_EGENERIC;
3076 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3080 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3081 control.value = ext_control.value;
3088 msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3089 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3092 val.b_bool = control.value;
3093 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3094 var_SetVoid( p_obj, "controls-update" );
3096 case VLC_VAR_INTEGER:
3097 val.i_int = control.value;
3098 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3099 var_SetVoid( p_obj, "controls-update" );
3106 /*****************************************************************************
3107 * On the fly change settings callback
3108 *****************************************************************************/
3109 static int DemuxControlCallback( vlc_object_t *p_this,
3110 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3114 demux_t *p_demux = (demux_t*)p_this;
3115 demux_sys_t *p_sys = p_demux->p_sys;
3116 int i_cid = (long int)p_data;
3118 int i_fd = p_sys->i_fd;
3121 return VLC_EGENERIC;
3123 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3125 return VLC_EGENERIC;
3128 static int DemuxControlResetCallback( vlc_object_t *p_this,
3129 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3131 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3132 demux_t *p_demux = (demux_t*)p_this;
3133 demux_sys_t *p_sys = p_demux->p_sys;
3135 int i_fd = p_sys->i_fd;
3138 return VLC_EGENERIC;
3140 ControlReset( p_this, p_sys, i_fd );
3142 return VLC_EGENERIC;
3145 static int AccessControlCallback( vlc_object_t *p_this,
3146 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3150 access_t *p_access = (access_t *)p_this;
3151 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3152 int i_cid = (long int)p_data;
3154 int i_fd = p_sys->i_fd;
3157 return VLC_EGENERIC;
3159 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3161 return VLC_EGENERIC;
3164 static int AccessControlResetCallback( vlc_object_t *p_this,
3165 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3167 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3168 access_t *p_access = (access_t *)p_this;
3169 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3171 int i_fd = p_sys->i_fd;
3174 return VLC_EGENERIC;
3176 ControlReset( p_this, p_sys, i_fd );
3178 return VLC_EGENERIC;