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_charset.h>
44 #include <vlc_demux.h>
45 #include <vlc_input.h>
50 #include <sys/ioctl.h>
53 #include <linux/videodev2.h>
61 /*****************************************************************************
63 *****************************************************************************/
65 static int DemuxOpen ( vlc_object_t * );
66 static void DemuxClose( vlc_object_t * );
67 static int AccessOpen ( vlc_object_t * );
68 static void AccessClose( vlc_object_t * );
70 #define STANDARD_TEXT N_( "Standard" )
71 #define STANDARD_LONGTEXT N_( \
72 "Video standard (Default, SECAM, PAL, or NTSC)." )
73 #define CHROMA_TEXT N_("Video input chroma format")
74 #define CHROMA_LONGTEXT N_( \
75 "Force the Video4Linux2 video device to use a specific chroma format " \
76 "(eg. I420 or I422 for raw images, MJPG for M-JPEG compressed input) " \
77 "(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
78 "I41N, I422, I420, I411, I410, MJPG)")
79 #define INPUT_TEXT N_( "Input" )
80 #define INPUT_LONGTEXT N_( \
81 "Input of the card to use (see debug)." )
82 #define AUDIO_INPUT_TEXT N_( "Audio input" )
83 #define AUDIO_INPUT_LONGTEXT N_( \
84 "Audio input of the card to use (see debug)." )
85 #define IOMETHOD_TEXT N_( "IO Method" )
86 #define IOMETHOD_LONGTEXT N_( \
87 "IO Method (READ, MMAP, USERPTR)." )
88 #define WIDTH_TEXT N_( "Width" )
89 #define WIDTH_LONGTEXT N_( \
90 "Force width (-1 for autodetect, 0 for driver default)." )
91 #define HEIGHT_TEXT N_( "Height" )
92 #define HEIGHT_LONGTEXT N_( \
93 "Force height (-1 for autodetect, 0 for driver default)." )
94 #define FPS_TEXT N_( "Framerate" )
95 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
96 "(0 for autodetect)." )
99 #define LIBV4L2_TEXT N_( "Use libv4l2" )
100 #define LIBV4L2_LONGTEXT N_( \
101 "Force usage of the libv4l2 wrapper." )
104 #define CTRL_RESET_TEXT N_( "Reset v4l2 controls" )
105 #define CTRL_RESET_LONGTEXT N_( \
106 "Reset controls to defaults provided by the v4l2 driver." )
107 #define BRIGHTNESS_TEXT N_( "Brightness" )
108 #define BRIGHTNESS_LONGTEXT N_( \
109 "Brightness of the video input (if supported by the v4l2 driver)." )
110 #define CONTRAST_TEXT N_( "Contrast" )
111 #define CONTRAST_LONGTEXT N_( \
112 "Contrast of the video input (if supported by the v4l2 driver)." )
113 #define SATURATION_TEXT N_( "Saturation" )
114 #define SATURATION_LONGTEXT N_( \
115 "Saturation of the video input (if supported by the v4l2 driver)." )
116 #define HUE_TEXT N_( "Hue" )
117 #define HUE_LONGTEXT N_( \
118 "Hue of the video input (if supported by the v4l2 driver)." )
119 #define BLACKLEVEL_TEXT N_( "Black level" )
120 #define BLACKLEVEL_LONGTEXT N_( \
121 "Black level of the video input (if supported by the v4l2 driver)." )
122 #define AUTOWHITEBALANCE_TEXT N_( "Auto white balance" )
123 #define AUTOWHITEBALANCE_LONGTEXT N_( \
124 "Automatically set the white balance of the video input " \
125 "(if supported by the v4l2 driver)." )
126 #define DOWHITEBALANCE_TEXT N_( "Do white balance" )
127 #define DOWHITEBALANCE_LONGTEXT N_( \
128 "Trigger a white balancing action, useless if auto white balance is " \
129 "activated (if supported by the v4l2 driver)." )
130 #define REDBALANCE_TEXT N_( "Red balance" )
131 #define REDBALANCE_LONGTEXT N_( \
132 "Red balance of the video input (if supported by the v4l2 driver)." )
133 #define BLUEBALANCE_TEXT N_( "Blue balance" )
134 #define BLUEBALANCE_LONGTEXT N_( \
135 "Blue balance of the video input (if supported by the v4l2 driver)." )
136 #define GAMMA_TEXT N_( "Gamma" )
137 #define GAMMA_LONGTEXT N_( \
138 "Gamma of the video input (if supported by the v4l2 driver)." )
139 #define EXPOSURE_TEXT N_( "Exposure" )
140 #define EXPOSURE_LONGTEXT N_( \
141 "Exposure of the video input (if supported by the v4L2 driver)." )
142 #define AUTOGAIN_TEXT N_( "Auto gain" )
143 #define AUTOGAIN_LONGTEXT N_( \
144 "Automatically set the video input's gain (if supported by the " \
146 #define GAIN_TEXT N_( "Gain" )
147 #define GAIN_LONGTEXT N_( \
148 "Video input's gain (if supported by the v4l2 driver)." )
149 #define HFLIP_TEXT N_( "Horizontal flip" )
150 #define HFLIP_LONGTEXT N_( \
151 "Flip the video horizontally (if supported by the v4l2 driver)." )
152 #define VFLIP_TEXT N_( "Vertical flip" )
153 #define VFLIP_LONGTEXT N_( \
154 "Flip the video vertically (if supported by the v4l2 driver)." )
155 #define HCENTER_TEXT N_( "Horizontal centering" )
156 #define HCENTER_LONGTEXT N_( \
157 "Set the camera's horizontal centering (if supported by the v4l2 driver)." )
158 #define VCENTER_TEXT N_( "Vertical centering" )
159 #define VCENTER_LONGTEXT N_( \
160 "Set the camera's vertical centering (if supported by the v4l2 driver)." )
162 #define AUDIO_VOLUME_TEXT N_( "Volume" )
163 #define AUDIO_VOLUME_LONGTEXT N_( \
164 "Volume of the audio input (if supported by the v4l2 driver)." )
165 #define AUDIO_BALANCE_TEXT N_( "Balance" )
166 #define AUDIO_BALANCE_LONGTEXT N_( \
167 "Balance of the audio input (if supported by the v4l2 driver)." )
168 #define AUDIO_MUTE_TEXT N_( "Mute" )
169 #define AUDIO_MUTE_LONGTEXT N_( \
170 "Mute audio input (if supported by the v4l2 driver)." )
171 #define AUDIO_BASS_TEXT N_( "Bass" )
172 #define AUDIO_BASS_LONGTEXT N_( \
173 "Bass level of the audio input (if supported by the v4l2 driver)." )
174 #define AUDIO_TREBLE_TEXT N_( "Treble" )
175 #define AUDIO_TREBLE_LONGTEXT N_( \
176 "Treble level of the audio input (if supported by the v4l2 driver)." )
177 #define AUDIO_LOUDNESS_TEXT N_( "Loudness" )
178 #define AUDIO_LOUDNESS_LONGTEXT N_( \
179 "Loudness of the audio input (if supported by the v4l2 driver)." )
181 #define CACHING_TEXT N_("Caching value in ms")
182 #define CACHING_LONGTEXT N_( \
183 "Caching value for V4L2 captures. This " \
184 "value should be set in milliseconds." )
185 #define S_CTRLS_TEXT N_("v4l2 driver controls")
186 #define S_CTRLS_LONGTEXT N_( \
187 "Set the v4l2 driver controls to the values specified using a comma " \
188 "separated list optionally encapsulated by curly braces " \
189 "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
190 "To list available controls, increase verbosity (-vvv) " \
191 "or use the v4l2-ctl application." )
193 #define TUNER_TEXT N_("Tuner id")
194 #define TUNER_LONGTEXT N_( \
195 "Tuner id (see debug output)." )
196 #define FREQUENCY_TEXT N_("Frequency")
197 #define FREQUENCY_LONGTEXT N_( \
198 "Tuner frequency in Hz or kHz (see debug output)" )
199 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
200 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
201 "Tuner audio mono/stereo and track selection." )
203 #define AUDIO_DEPRECATED_ERROR N_( \
204 "Alsa or OSS audio capture in the v4l2 access is deprecated. " \
205 "please use 'v4l2:/""/ :input-slave=alsa:/""/' or " \
206 "'v4l2:/""/ :input-slave=oss:/""/' instead." )
208 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
209 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
218 static const int i_standards_list[] =
219 { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC,
220 V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
221 V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
222 V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
223 V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP, V4L2_STD_NTSC_443,
225 V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G,
226 V4L2_STD_SECAM_H, V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1,
227 V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
228 V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
230 static const char *const psz_standards_list_text[] =
231 { N_("Default"), "SECAM", "PAL", "NTSC",
232 "PAL_B", "PAL_B1", "PAL_G", "PAL_H", "PAL_I", "PAL_D",
233 "PAL_D1", "PAL_K", "PAL_M", "PAL_N", "PAL_Nc", "PAL_60",
234 "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR",
235 "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H", "SECAM_K",
236 "SECAM_K1", "SECAM_L", "SECAM_LC",
237 "ATSC_8_VSB", "ATSC_16_VSB"
240 static const int i_iomethod_list[] =
241 { IO_METHOD_AUTO, IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
242 static const char *const psz_iomethod_list_text[] =
243 { N_("AUTO"), N_("READ"), N_("MMAP"), N_("USERPTR") };
245 static const int i_tuner_audio_modes_list[] =
246 { V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
247 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
248 V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
249 static const char *const psz_tuner_audio_modes_list_text[] =
252 N_( "Primary language (Analog TV tuners only)" ),
253 N_( "Secondary language (Analog TV tuners only)" ),
254 N_( "Second audio program (Analog TV tuners only)" ),
255 N_( "Primary language left, Secondary language right" ) };
257 #define V4L2_DEFAULT "/dev/video0"
258 #define CFG_PREFIX "v4l2-"
261 set_shortname( N_("Video4Linux2") )
262 set_description( N_("Video4Linux2 input") )
263 set_category( CAT_INPUT )
264 set_subcategory( SUBCAT_INPUT_ACCESS )
266 set_section( N_( "Video input" ), NULL )
267 add_integer( CFG_PREFIX "standard", 0, NULL, STANDARD_TEXT,
268 STANDARD_LONGTEXT, false )
269 change_integer_list( i_standards_list, psz_standards_list_text, NULL )
270 add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
272 add_integer( CFG_PREFIX "input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
274 add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
275 AUDIO_INPUT_LONGTEXT, true )
276 add_integer( CFG_PREFIX "io", IO_METHOD_AUTO, NULL, IOMETHOD_TEXT,
277 IOMETHOD_LONGTEXT, true )
278 change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL )
279 add_integer( CFG_PREFIX "width", -1, NULL, WIDTH_TEXT,
280 WIDTH_LONGTEXT, true )
281 add_integer( CFG_PREFIX "height", -1, NULL, HEIGHT_TEXT,
282 HEIGHT_LONGTEXT, true )
283 add_string( CFG_PREFIX "aspect-ratio", "4:3", NULL, ASPECT_TEXT,
284 ASPECT_LONGTEXT, true )
285 add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
286 add_integer( CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL,
287 CACHING_TEXT, CACHING_LONGTEXT, true )
289 add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
292 set_section( N_( "Tuner" ), NULL )
293 add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
295 add_integer( CFG_PREFIX "tuner-frequency", -1, NULL, FREQUENCY_TEXT,
296 FREQUENCY_LONGTEXT, true )
297 add_integer( CFG_PREFIX "tuner-audio-mode", -1, NULL, TUNER_AUDIO_MODE_TEXT,
298 TUNER_AUDIO_MODE_LONGTEXT, true )
299 change_integer_list( i_tuner_audio_modes_list,
300 psz_tuner_audio_modes_list_text, 0 )
302 set_section( N_( "Controls" ),
303 N_( "v4l2 driver controls, if supported by your v4l2 driver." ) )
304 add_bool( CFG_PREFIX "controls-reset", false, NULL, CTRL_RESET_TEXT,
305 CTRL_RESET_LONGTEXT, true )
306 add_integer( CFG_PREFIX "brightness", -1, NULL, BRIGHTNESS_TEXT,
307 BRIGHTNESS_LONGTEXT, true )
308 add_integer( CFG_PREFIX "contrast", -1, NULL, CONTRAST_TEXT,
309 CONTRAST_LONGTEXT, true )
310 add_integer( CFG_PREFIX "saturation", -1, NULL, SATURATION_TEXT,
311 SATURATION_LONGTEXT, true )
312 add_integer( CFG_PREFIX "hue", -1, NULL, HUE_TEXT,
314 add_integer( CFG_PREFIX "black-level", -1, NULL, BLACKLEVEL_TEXT,
315 BLACKLEVEL_LONGTEXT, true )
316 add_integer( CFG_PREFIX "auto-white-balance", -1, NULL,
317 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
318 add_integer( CFG_PREFIX "do-white-balance", -1, NULL, DOWHITEBALANCE_TEXT,
319 DOWHITEBALANCE_LONGTEXT, true )
320 add_integer( CFG_PREFIX "red-balance", -1, NULL, REDBALANCE_TEXT,
321 REDBALANCE_LONGTEXT, true )
322 add_integer( CFG_PREFIX "blue-balance", -1, NULL, BLUEBALANCE_TEXT,
323 BLUEBALANCE_LONGTEXT, true )
324 add_integer( CFG_PREFIX "gamma", -1, NULL, GAMMA_TEXT,
325 GAMMA_LONGTEXT, true )
326 add_integer( CFG_PREFIX "exposure", -1, NULL, EXPOSURE_TEXT,
327 EXPOSURE_LONGTEXT, true )
328 add_integer( CFG_PREFIX "autogain", -1, NULL, AUTOGAIN_TEXT,
329 AUTOGAIN_LONGTEXT, true )
330 add_integer( CFG_PREFIX "gain", -1, NULL, GAIN_TEXT,
331 GAIN_LONGTEXT, true )
332 add_integer( CFG_PREFIX "hflip", -1, NULL, HFLIP_TEXT,
333 HFLIP_LONGTEXT, true )
334 add_integer( CFG_PREFIX "vflip", -1, NULL, VFLIP_TEXT,
335 VFLIP_LONGTEXT, true )
336 add_integer( CFG_PREFIX "hcenter", -1, NULL, HCENTER_TEXT,
337 HCENTER_LONGTEXT, true )
338 add_integer( CFG_PREFIX "vcenter", -1, NULL, VCENTER_TEXT,
339 VCENTER_LONGTEXT, true )
340 add_integer( CFG_PREFIX "audio-volume", -1, NULL, AUDIO_VOLUME_TEXT,
341 AUDIO_VOLUME_LONGTEXT, true )
342 add_integer( CFG_PREFIX "audio-balance", -1, NULL, AUDIO_BALANCE_TEXT,
343 AUDIO_BALANCE_LONGTEXT, true )
344 add_bool( CFG_PREFIX "audio-mute", false, NULL, AUDIO_MUTE_TEXT,
345 AUDIO_MUTE_LONGTEXT, true )
346 add_integer( CFG_PREFIX "audio-bass", -1, NULL, AUDIO_BASS_TEXT,
347 AUDIO_BASS_LONGTEXT, true )
348 add_integer( CFG_PREFIX "audio-treble", -1, NULL, AUDIO_TREBLE_TEXT,
349 AUDIO_TREBLE_LONGTEXT, true )
350 add_integer( CFG_PREFIX "audio-loudness", -1, NULL, AUDIO_LOUDNESS_TEXT,
351 AUDIO_LOUDNESS_LONGTEXT, true )
352 add_string( CFG_PREFIX "set-ctrls", NULL, NULL, S_CTRLS_TEXT,
353 S_CTRLS_LONGTEXT, true )
355 add_obsolete_string( CFG_PREFIX "dev" )
357 add_obsolete_string( CFG_PREFIX "adev" )
358 add_obsolete_integer( CFG_PREFIX "audio-method" )
359 add_obsolete_bool( CFG_PREFIX "stereo" )
360 add_obsolete_integer( CFG_PREFIX "samplerate" )
362 add_shortcut( "v4l2" )
363 set_capability( "access_demux", 10 )
364 set_callbacks( DemuxOpen, DemuxClose )
367 add_shortcut( "v4l2" )
368 add_shortcut( "v4l2c" )
369 set_description( N_("Video4Linux2 Compressed A/V") )
370 set_capability( "access", 0 )
371 /* use these when open as access_demux fails; VLC will use another demux */
372 set_callbacks( AccessOpen, AccessClose )
376 /*****************************************************************************
377 * Access: local prototypes
378 *****************************************************************************/
380 static void CommonClose( vlc_object_t *, demux_sys_t * );
381 static void ParseMRL( demux_sys_t *, char *, vlc_object_t * );
382 static void GetV4L2Params( demux_sys_t *, vlc_object_t * );
383 static void SetAvailControlsByString( vlc_object_t *, demux_sys_t *, int );
385 static int DemuxControl( demux_t *, int, va_list );
386 static int AccessControl( access_t *, int, va_list );
388 static int Demux( demux_t * );
389 static block_t *AccessRead( access_t * );
390 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len );
392 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys );
393 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
395 static bool IsPixelFormatSupported( demux_t *p_demux,
396 unsigned int i_pixelformat );
398 static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
399 static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
400 const char *psz_device );
402 static int ControlList( vlc_object_t *, demux_sys_t *, int , bool, bool );
403 static int Control( vlc_object_t *, demux_sys_t *, int i_fd,
404 const char *psz_name, int i_cid, int i_value );
406 static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
407 vlc_value_t oldval, vlc_value_t newval,
409 static int DemuxControlResetCallback( vlc_object_t *p_this, const char *psz_var,
410 vlc_value_t oldval, vlc_value_t newval,
412 static int AccessControlCallback( vlc_object_t *p_this, const char *psz_var,
413 vlc_value_t oldval, vlc_value_t newval,
415 static int AccessControlResetCallback( vlc_object_t *p_this,
416 const char *psz_var, vlc_value_t oldval,
417 vlc_value_t newval, void *p_data );
422 vlc_fourcc_t i_fourcc;
426 } v4l2chroma_to_fourcc[] =
429 { V4L2_PIX_FMT_GREY, VLC_CODEC_GREY, 0, 0, 0 },
430 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
431 { V4L2_PIX_FMT_RGB555, VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
432 { V4L2_PIX_FMT_RGB565, VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
433 /* Won't work since we don't know how to handle such gmask values
435 { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
436 { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
438 { V4L2_PIX_FMT_BGR24, VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
439 { V4L2_PIX_FMT_RGB24, VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
440 { V4L2_PIX_FMT_BGR32, VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
441 { V4L2_PIX_FMT_RGB32, VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
442 { V4L2_PIX_FMT_YUYV, VLC_CODEC_YUYV, 0, 0, 0 },
443 { V4L2_PIX_FMT_UYVY, VLC_CODEC_UYVY, 0, 0, 0 },
444 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
445 { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
446 { V4L2_PIX_FMT_YVU420, VLC_CODEC_YV12, 0, 0, 0 },
447 { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
448 { V4L2_PIX_FMT_YUV410, VLC_CODEC_I410, 0, 0, 0 },
450 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
452 { V4L2_PIX_FMT_YUV420, VLC_CODEC_I420, 0, 0, 0 },
453 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_CODEC_RGB32 }, */
455 /* Compressed data types */
456 { V4L2_PIX_FMT_MJPEG, VLC_CODEC_MJPG, 0, 0, 0 },
457 { V4L2_PIX_FMT_JPEG, VLC_CODEC_JPEG, 0, 0, 0 },
459 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
460 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
466 * List of V4L2 chromas were confident enough to use as fallbacks if the
467 * user hasn't provided a --v4l2-chroma value.
469 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
471 static const __u32 p_chroma_fallbacks[] =
472 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
473 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
474 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
478 const char *psz_name;
482 { "brightness", V4L2_CID_BRIGHTNESS },
483 { "contrast", V4L2_CID_CONTRAST },
484 { "saturation", V4L2_CID_SATURATION },
485 { "hue", V4L2_CID_HUE },
486 { "audio-volume", V4L2_CID_AUDIO_VOLUME },
487 { "audio-balance", V4L2_CID_AUDIO_BALANCE },
488 { "audio-bass", V4L2_CID_AUDIO_BASS },
489 { "audio-treble", V4L2_CID_AUDIO_TREBLE },
490 { "audio-mute", V4L2_CID_AUDIO_MUTE },
491 { "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
492 { "black-level", V4L2_CID_BLACK_LEVEL },
493 { "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
494 { "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
495 { "red-balance", V4L2_CID_RED_BALANCE },
496 { "blue-balance", V4L2_CID_BLUE_BALANCE },
497 { "gamma", V4L2_CID_GAMMA },
498 { "exposure", V4L2_CID_EXPOSURE },
499 { "autogain", V4L2_CID_AUTOGAIN },
500 { "gain", V4L2_CID_GAIN },
501 { "hflip", V4L2_CID_HFLIP },
502 { "vflip", V4L2_CID_VFLIP },
503 { "hcenter", V4L2_CID_HCENTER },
504 { "vcenter", V4L2_CID_VCENTER },
516 char *psz_device; /* Main device from MRL */
519 char *psz_requested_chroma;
526 struct v4l2_capability dev_cap;
529 struct v4l2_input *p_inputs;
530 int i_selected_input;
533 struct v4l2_standard *p_standards;
534 v4l2_std_id i_selected_standard_id;
537 /* V4L2 devices cannot have more than 32 audio inputs */
538 struct v4l2_audio p_audios[32];
539 int i_selected_audio_input;
542 struct v4l2_tuner *p_tuners;
545 struct v4l2_fmtdesc *p_codecs;
547 struct buffer_t *p_buffers;
548 unsigned int i_nbuffers;
552 unsigned int i_aspect;
553 float f_fps; /* <= 0.0 mean to grab at full rate */
554 mtime_t i_video_pts; /* only used when f_fps > 0 */
556 uint32_t i_block_flags;
571 int (*pf_close)( int );
572 int (*pf_dup)( int );
573 int (*pf_ioctl)( int, unsigned long int, ... );
574 ssize_t (*pf_read)( int, void *, size_t );
575 void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
576 int (*pf_munmap)( void *, size_t );
582 static void use_kernel_v4l2( demux_sys_t *p_sys )
584 p_sys->pf_close = close;
586 p_sys->pf_ioctl = ioctl;
587 p_sys->pf_read = read;
588 p_sys->pf_mmap = mmap;
589 p_sys->pf_munmap = munmap;
590 p_sys->b_libv4l2 = false;
593 static void use_libv4l2( demux_sys_t *p_sys )
595 p_sys->pf_close = v4l2_close;
596 p_sys->pf_dup = v4l2_dup;
597 p_sys->pf_ioctl = v4l2_ioctl;
598 p_sys->pf_read = v4l2_read;
599 p_sys->pf_mmap = v4l2_mmap;
600 p_sys->pf_munmap = v4l2_munmap;
601 p_sys->b_libv4l2 = true;
604 # define v4l2_close (p_sys->pf_close)
605 # define v4l2_dup (p_sys->pf_dup)
606 # define v4l2_ioctl (p_sys->pf_ioctl)
607 # define v4l2_read (p_sys->pf_read)
608 # define v4l2_mmap (p_sys->pf_mmap)
609 # define v4l2_munmap (p_sys->pf_munmap)
611 # define v4l2_close close
612 # define v4l2_dup dup
613 # define v4l2_ioctl ioctl
614 # define v4l2_read read
615 # define v4l2_mmap mmap
616 # define v4l2_munmap munmap
619 static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
622 /* TODO: if using default device, loop through all /dev/video* until
624 msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
625 if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
627 msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
628 p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
631 if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
635 /*****************************************************************************
636 * DemuxOpen: opens v4l2 device, access_demux callback
637 *****************************************************************************
639 * url: <video device>::::
641 *****************************************************************************/
642 static int DemuxOpen( vlc_object_t *p_this )
644 demux_t *p_demux = (demux_t*)p_this;
647 /* Only when selected */
648 if( strcmp( p_demux->psz_access, "v4l2" ) )
652 p_demux->pf_control = DemuxControl;
653 p_demux->pf_demux = Demux;
654 p_demux->info.i_update = 0;
655 p_demux->info.i_title = 0;
656 p_demux->info.i_seekpoint = 0;
658 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
659 if( p_sys == NULL ) return VLC_ENOMEM;
661 GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
663 ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
666 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
668 msg_Dbg( p_this, "Trying direct kernel v4l2" );
669 use_kernel_v4l2( p_sys );
670 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
674 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
675 use_libv4l2( p_sys );
677 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
680 DemuxClose( p_this );
684 /*****************************************************************************
685 * GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
686 *****************************************************************************/
687 static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
689 p_sys->i_video_pts = -1;
691 p_sys->i_selected_standard_id =
692 i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
694 p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
695 p_sys->i_selected_audio_input =
696 var_CreateGetInteger( p_obj, "v4l2-audio-input" );
698 p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
700 p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
701 p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
703 var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
705 p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
706 p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
708 p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
710 p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
711 p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
712 p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
714 p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
716 char *psz_aspect = var_CreateGetString( p_obj, "v4l2-aspect-ratio" );
717 if( psz_aspect && *psz_aspect && strchr( psz_aspect, ':' ) )
719 char *psz_delim = strchr( psz_aspect, ':' );
720 p_sys->i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR / atoi( psz_delim + 1 );
724 p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3 ;
729 p_sys->psz_device = NULL;
735 /*****************************************************************************
736 * ParseMRL: parse the options contained in the MRL
737 *****************************************************************************/
738 static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
740 char *psz_dup = strdup( psz_path );
741 char *psz_parser = psz_dup;
743 while( *psz_parser && *psz_parser != ':' )
748 if( *psz_parser == ':' )
753 *psz_parser++ = '\0';
755 if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
757 psz_parser += strlen( "standard=" );
759 for( i = 0; i < ARRAY_SIZE(psz_standards_list_text); i++ )
761 const char *psz_value = psz_standards_list_text[i];
762 size_t i_len = strlen( psz_value );
763 if( !strncasecmp( psz_parser, psz_value, i_len ) &&
764 ( psz_parser[i_len] == ':' || psz_parser[i_len] == 0 ) )
766 p_sys->i_selected_standard_id = i_standards_list[i];
772 if( i == ARRAY_SIZE(psz_standards_list_text) )
773 p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
775 else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
779 psz_parser += strlen( "chroma=" );
780 if( strchr( psz_parser, ':' ) )
782 i_len = strchr( psz_parser, ':' ) - psz_parser;
786 i_len = strlen( psz_parser );
789 free( p_sys->psz_requested_chroma );
790 p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
794 else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
796 p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
799 else if( !strncmp( psz_parser, "audio-input=", strlen( "audio-input=" ) ) )
801 p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-input=" ),
804 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
806 p_sys->f_fps = us_strtof( psz_parser + strlen( "fps=" ),
809 else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
811 psz_parser += strlen( "io=" );
812 if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
814 p_sys->io = IO_METHOD_READ;
815 psz_parser += strlen( "read" );
817 else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
819 p_sys->io = IO_METHOD_MMAP;
820 psz_parser += strlen( "mmap" );
822 else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
824 p_sys->io = IO_METHOD_USERPTR;
825 psz_parser += strlen( "userptr" );
827 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
829 p_sys->io = IO_METHOD_AUTO;
830 psz_parser += strlen( "auto" );
834 p_sys->io = strtol( psz_parser, &psz_parser, 0 );
837 else if( !strncmp( psz_parser, "width=",
838 strlen( "width=" ) ) )
841 strtol( psz_parser + strlen( "width=" ),
844 else if( !strncmp( psz_parser, "height=",
845 strlen( "height=" ) ) )
848 strtol( psz_parser + strlen( "height=" ),
851 else if( !strncmp( psz_parser, "aspect-ratio=",
852 strlen( "aspect-ratio=" ) ) )
854 unsigned int num,den;
855 num = strtol( psz_parser + strlen( "aspect-ratio=" ),
857 den = strtol( psz_parser + strlen( ":" ),
860 p_sys->i_aspect = num * VOUT_ASPECT_FACTOR / den;
862 else if( !strncmp( psz_parser, "controls-reset",
863 strlen( "controls-reset" ) ) )
865 var_SetBool( p_obj, "v4l2-controls-reset", true );
866 psz_parser += strlen( "controls-reset" );
869 else if( !strncmp( psz_parser, "brightness=",
870 strlen( "brightness=" ) ) )
872 var_SetInteger( p_obj, "brightness",
873 strtol( psz_parser + strlen( "brightness=" ),
876 else if( !strncmp( psz_parser, "contrast=",
877 strlen( "contrast=" ) ) )
879 var_SetInteger( p_obj, "contrast",
880 strtol( psz_parser + strlen( "contrast=" ),
883 else if( !strncmp( psz_parser, "saturation=",
884 strlen( "saturation=" ) ) )
886 var_SetInteger( p_obj, "saturation",
887 strtol( psz_parser + strlen( "saturation=" ),
890 else if( !strncmp( psz_parser, "hue=",
893 var_SetInteger( p_obj, "hue",
894 strtol( psz_parser + strlen( "hue=" ),
897 else if( !strncmp( psz_parser, "gamma=",
898 strlen( "gamma=" ) ) )
900 var_SetInteger( p_obj, "gamma",
901 strtol( psz_parser + strlen( "gamma=" ),
905 else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
907 p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
910 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
912 p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
915 else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
917 p_sys->i_frequency = strtol( psz_parser
918 + strlen( "tuner-frequency=" ),
921 else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
923 p_sys->i_audio_mode = strtol( psz_parser
924 + strlen( "tuner-audio-mode=" ),
927 else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
931 psz_parser += strlen( "set-ctrls=" );
932 if( strchr( psz_parser, ':' ) )
934 i_len = strchr( psz_parser, ':' ) - psz_parser;
938 i_len = strlen( psz_parser );
941 p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
945 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
946 || !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
947 || !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
948 || !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
949 || !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
951 if( strchr( psz_parser, ':' ) )
953 psz_parser = strchr( psz_parser, ':' );
957 psz_parser += strlen( psz_parser );
960 msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
964 char *psz_unk = strchr( psz_parser, ':' );
966 psz_unk = strndup( psz_parser, psz_unk - psz_parser );
968 psz_unk = strdup( psz_parser);
969 msg_Warn( p_obj, "unknown option %s", psz_unk );
973 while( *psz_parser && *psz_parser != ':' )
978 if( *psz_parser == '\0' )
987 p_sys->psz_device = strdup( psz_dup );
989 p_sys->psz_device = strdup( V4L2_DEFAULT );
993 /*****************************************************************************
994 * Close: close device, free resources
995 *****************************************************************************/
996 static void AccessClose( vlc_object_t *p_this )
998 access_t *p_access = (access_t *)p_this;
999 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1001 CommonClose( p_this, p_sys );
1004 static void DemuxClose( vlc_object_t *p_this )
1006 struct v4l2_buffer buf;
1007 enum v4l2_buf_type buf_type;
1010 demux_t *p_demux = (demux_t *)p_this;
1011 demux_sys_t *p_sys = p_demux->p_sys;
1013 /* Stop video capture */
1014 if( p_sys->i_fd >= 0 )
1018 case IO_METHOD_READ:
1022 case IO_METHOD_MMAP:
1023 case IO_METHOD_USERPTR:
1024 /* Some drivers 'hang' internally if this is not done before streamoff */
1025 for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
1027 memset( &buf, 0, sizeof(buf) );
1028 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1029 buf.memory = ( p_sys->io == IO_METHOD_USERPTR ) ?
1030 V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
1031 v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
1034 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1035 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
1036 msg_Err( p_this, "VIDIOC_STREAMOFF failed" );
1046 /* Free Video Buffers */
1047 if( p_sys->p_buffers ) {
1050 case IO_METHOD_READ:
1051 free( p_sys->p_buffers[0].start );
1054 case IO_METHOD_MMAP:
1055 for( i = 0; i < p_sys->i_nbuffers; ++i )
1057 if( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
1059 msg_Err( p_this, "munmap failed" );
1064 case IO_METHOD_USERPTR:
1065 for( i = 0; i < p_sys->i_nbuffers; ++i )
1067 free( p_sys->p_buffers[i].start );
1074 free( p_sys->p_buffers );
1077 CommonClose( p_this, p_sys );
1080 static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
1084 if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
1085 free( p_sys->psz_device );
1086 free( p_sys->p_standards );
1087 free( p_sys->p_inputs );
1088 free( p_sys->p_tuners );
1089 free( p_sys->p_codecs );
1090 free( p_sys->psz_requested_chroma );
1091 free( p_sys->psz_set_ctrls );
1096 /*****************************************************************************
1097 * AccessOpen: opens v4l2 device, access callback
1098 *****************************************************************************
1100 * url: <video device>::::
1102 *****************************************************************************/
1103 static int AccessOpen( vlc_object_t * p_this )
1105 access_t *p_access = (access_t*) p_this;
1106 demux_sys_t * p_sys;
1108 /* Only when selected */
1109 if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
1111 access_InitFields( p_access );
1112 p_sys = calloc( 1, sizeof( demux_sys_t ));
1113 if( !p_sys ) return VLC_ENOMEM;
1114 p_access->p_sys = (access_sys_t*)p_sys;
1116 GetV4L2Params( p_sys, (vlc_object_t *) p_access );
1118 ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
1121 if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
1123 msg_Dbg( p_this, "Trying direct kernel v4l2" );
1124 use_kernel_v4l2( p_sys );
1125 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
1127 if( p_sys->io == IO_METHOD_READ )
1129 ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1133 ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1139 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
1140 use_libv4l2( p_sys );
1142 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
1144 if( p_sys->io == IO_METHOD_READ )
1146 ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1150 ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1155 AccessClose( p_this );
1156 return VLC_EGENERIC;
1159 /*****************************************************************************
1161 *****************************************************************************/
1162 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
1166 /* Special for access_demux */
1167 case DEMUX_CAN_PAUSE:
1168 case DEMUX_CAN_SEEK:
1169 case DEMUX_CAN_CONTROL_PACE:
1170 *va_arg( args, bool * ) = false;
1173 case DEMUX_GET_PTS_DELAY:
1174 *va_arg(args,int64_t *) = (int64_t)p_demux->p_sys->i_cache*1000;
1177 case DEMUX_GET_TIME:
1178 *va_arg( args, int64_t * ) = mdate();
1181 /* TODO implement others */
1183 return VLC_EGENERIC;
1186 return VLC_EGENERIC;
1189 /*****************************************************************************
1190 * AccessControl: access callback
1191 *****************************************************************************/
1192 static int AccessControl( access_t *p_access, int i_query, va_list args )
1194 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1199 case ACCESS_CAN_SEEK:
1200 case ACCESS_CAN_FASTSEEK:
1201 case ACCESS_CAN_PAUSE:
1202 case ACCESS_CAN_CONTROL_PACE:
1203 *va_arg( args, bool* ) = false;
1207 case ACCESS_GET_PTS_DELAY:
1208 *va_arg(args,int64_t *) = (int64_t)p_sys->i_cache*1000;
1212 case ACCESS_SET_PAUSE_STATE:
1216 case ACCESS_GET_TITLE_INFO:
1217 case ACCESS_SET_TITLE:
1218 case ACCESS_SET_SEEKPOINT:
1219 case ACCESS_SET_PRIVATE_ID_STATE:
1220 case ACCESS_GET_CONTENT_TYPE:
1221 case ACCESS_GET_META:
1222 return VLC_EGENERIC;
1225 msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1226 return VLC_EGENERIC;
1232 /*****************************************************************************
1233 * AccessRead: access callback
1234 ******************************************************************************/
1235 static block_t *AccessRead( access_t * p_access )
1237 demux_sys_t *p_sys = (demux_sys_t *)p_access->p_sys;
1240 fd.fd = p_sys->i_fd;
1241 fd.events = POLLIN|POLLPRI;
1245 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1247 if( fd.revents & (POLLIN|POLLPRI) )
1249 return GrabVideo( VLC_OBJECT(p_access), p_sys );
1256 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len )
1258 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1262 ufd.fd = p_sys->i_fd;
1263 ufd.events = POLLIN;
1265 if( p_access->info.b_eof )
1270 if( !vlc_object_alive (p_access) )
1275 while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
1279 msg_Err( p_access, "Polling error (%m)." );
1283 i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
1286 p_access->info.b_eof = true;
1288 else if( i_ret > 0 )
1290 p_access->info.i_pos += i_ret;
1296 /*****************************************************************************
1297 * Demux: Processes the audio or video frame
1298 *****************************************************************************/
1299 static int Demux( demux_t *p_demux )
1301 demux_sys_t *p_sys = p_demux->p_sys;
1304 fd.fd = p_sys->i_fd;
1305 fd.events = POLLIN|POLLPRI;
1309 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1311 if( fd.revents & (POLLIN|POLLPRI) )
1313 block_t *p_block = GrabVideo( VLC_OBJECT(p_demux), p_sys );
1316 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1317 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1325 /*****************************************************************************
1326 * GrabVideo: Grab a video frame
1327 *****************************************************************************/
1328 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
1330 block_t *p_block = NULL;
1331 struct v4l2_buffer buf;
1334 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1336 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1338 /* Did we wait long enough ? (frame rate reduction) */
1339 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1342 /* Grab Video Frame */
1345 case IO_METHOD_READ:
1346 i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1354 /* Could ignore EIO, see spec. */
1357 msg_Err( p_demux, "Failed to read frame" );
1362 p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1363 if( !p_block ) return 0;
1367 case IO_METHOD_MMAP:
1368 memset( &buf, 0, sizeof(buf) );
1369 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1370 buf.memory = V4L2_MEMORY_MMAP;
1372 /* Wait for next frame */
1373 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1380 /* Could ignore EIO, see spec. */
1383 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1388 if( buf.index >= p_sys->i_nbuffers ) {
1389 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1393 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1394 if( !p_block ) return 0;
1397 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1399 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1400 block_Release( p_block );
1406 case IO_METHOD_USERPTR:
1407 memset( &buf, 0, sizeof(buf) );
1408 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1409 buf.memory = V4L2_MEMORY_USERPTR;
1411 /* Wait for next frame */
1412 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1419 /* Could ignore EIO, see spec. */
1422 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1429 for( i = 0; i < p_sys->i_nbuffers; i++ )
1431 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1432 buf.length == p_sys->p_buffers[i].length ) break;
1435 if( i >= p_sys->i_nbuffers )
1437 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1441 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1442 if( !p_block ) return 0;
1445 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1447 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1448 block_Release( p_block );
1459 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1460 p_block->i_flags |= p_sys->i_block_flags;
1465 /*****************************************************************************
1466 * ProcessVideoFrame: Helper function to take a buffer and copy it into
1468 *****************************************************************************/
1469 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
1473 if( !p_frame ) return 0;
1476 if( !( p_block = block_New( p_demux, i_size ) ) )
1478 msg_Warn( p_demux, "Cannot get new block" );
1483 memcpy( p_block->p_buffer, p_frame, i_size );
1488 /*****************************************************************************
1489 * Helper function to initalise video IO using the Read method
1490 *****************************************************************************/
1491 static int InitRead( vlc_object_t *p_demux, demux_sys_t *p_sys, unsigned int i_buffer_size )
1495 p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1496 if( !p_sys->p_buffers )
1497 return VLC_EGENERIC;
1499 p_sys->p_buffers[0].length = i_buffer_size;
1500 p_sys->p_buffers[0].start = malloc( i_buffer_size );
1501 if( !p_sys->p_buffers[0].start )
1507 /*****************************************************************************
1508 * Helper function to initalise video IO using the mmap method
1509 *****************************************************************************/
1510 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
1512 struct v4l2_requestbuffers req;
1514 memset( &req, 0, sizeof(req) );
1516 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1517 req.memory = V4L2_MEMORY_MMAP;
1519 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1521 msg_Err( p_demux, "device does not support mmap i/o" );
1527 msg_Err( p_demux, "Insufficient buffer memory" );
1531 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1532 if( !p_sys->p_buffers )
1535 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1537 struct v4l2_buffer buf;
1539 memset( &buf, 0, sizeof(buf) );
1540 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1541 buf.memory = V4L2_MEMORY_MMAP;
1542 buf.index = p_sys->i_nbuffers;
1544 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1546 msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1550 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1551 p_sys->p_buffers[p_sys->i_nbuffers].start =
1552 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1554 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1556 msg_Err( p_demux, "mmap failed (%m)" );
1564 return VLC_EGENERIC;
1568 /*****************************************************************************
1569 * Helper function to initalise video IO using the userbuf method
1570 *****************************************************************************/
1571 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
1573 struct v4l2_requestbuffers req;
1574 unsigned int i_page_size;
1576 i_page_size = sysconf(_SC_PAGESIZE);
1577 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1579 memset( &req, 0, sizeof(req) );
1581 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1582 req.memory = V4L2_MEMORY_USERPTR;
1584 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1586 msg_Err( p_demux, "device does not support user pointer i/o" );
1587 return VLC_EGENERIC;
1590 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1591 if( !p_sys->p_buffers )
1594 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1596 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1597 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1598 /* boundary */ i_page_size, i_buffer_size ) )
1605 free( p_sys->p_buffers );
1606 return VLC_EGENERIC;
1610 /*****************************************************************************
1611 * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1612 * in the array of supported formats returned by the driver
1613 *****************************************************************************/
1614 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1616 demux_sys_t *p_sys = p_demux->p_sys;
1618 for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1620 if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1627 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1628 uint32_t i_pixel_format,
1629 uint32_t i_width, uint32_t i_height )
1632 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1634 demux_sys_t *p_sys = p_demux->p_sys;
1636 /* This is new in Linux 2.6.19 */
1637 struct v4l2_frmivalenum frmival;
1638 memset( &frmival, 0, sizeof(frmival) );
1639 frmival.pixel_format = i_pixel_format;
1640 frmival.width = i_width;
1641 frmival.height = i_height;
1642 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1644 switch( frmival.type )
1646 case V4L2_FRMIVAL_TYPE_DISCRETE:
1648 float f_fps_max = -1;
1651 float f_fps = (float)frmival.discrete.denominator
1652 / (float)frmival.discrete.numerator;
1653 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1655 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1659 case V4L2_FRMSIZE_TYPE_STEPWISE:
1660 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1661 return __MAX( (float)frmival.stepwise.max.denominator
1662 / (float)frmival.stepwise.max.numerator,
1663 (float)frmival.stepwise.min.denominator
1664 / (float)frmival.stepwise.min.numerator );
1671 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1672 uint32_t i_pixel_format )
1674 float f_fps_max = -1.;
1675 #ifdef VIDIOC_ENUM_FRAMESIZES
1677 demux_sys_t *p_sys = p_demux->p_sys;
1679 /* This is new in Linux 2.6.19 */
1680 struct v4l2_frmsizeenum frmsize;
1681 memset( &frmsize, 0, sizeof(frmsize) );
1682 frmsize.pixel_format = i_pixel_format;
1683 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1685 switch( frmsize.type )
1687 case V4L2_FRMSIZE_TYPE_DISCRETE:
1691 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1693 frmsize.discrete.width,
1694 frmsize.discrete.height );
1695 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1696 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1699 case V4L2_FRMSIZE_TYPE_STEPWISE:
1701 uint32_t i_width = frmsize.stepwise.min_width;
1702 uint32_t i_height = frmsize.stepwise.min_height;
1704 i_width <= frmsize.stepwise.max_width &&
1705 i_height <= frmsize.stepwise.max_width;
1706 i_width += frmsize.stepwise.step_width,
1707 i_height += frmsize.stepwise.step_height )
1709 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1711 i_width, i_height );
1712 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1716 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1718 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1719 f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1721 frmsize.stepwise.max_width,
1722 frmsize.stepwise.max_height );
1730 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1731 uint32_t i_pixel_format, float f_fps_min,
1732 uint32_t *pi_width, uint32_t *pi_height )
1736 #ifdef VIDIOC_ENUM_FRAMESIZES
1738 demux_sys_t *p_sys = p_demux->p_sys;
1740 /* This is new in Linux 2.6.19 */
1741 struct v4l2_frmsizeenum frmsize;
1742 memset( &frmsize, 0, sizeof(frmsize) );
1743 frmsize.pixel_format = i_pixel_format;
1744 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1746 switch( frmsize.type )
1748 case V4L2_FRMSIZE_TYPE_DISCRETE:
1752 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1754 frmsize.discrete.width,
1755 frmsize.discrete.height );
1756 if( f_fps >= f_fps_min &&
1757 frmsize.discrete.width > *pi_width )
1759 *pi_width = frmsize.discrete.width;
1760 *pi_height = frmsize.discrete.height;
1762 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1765 case V4L2_FRMSIZE_TYPE_STEPWISE:
1767 uint32_t i_width = frmsize.stepwise.min_width;
1768 uint32_t i_height = frmsize.stepwise.min_height;
1770 i_width <= frmsize.stepwise.max_width &&
1771 i_height <= frmsize.stepwise.max_width;
1772 i_width += frmsize.stepwise.step_width,
1773 i_height += frmsize.stepwise.step_height )
1775 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1777 i_width, i_height );
1778 if( f_fps >= f_fps_min && i_width > *pi_width )
1780 *pi_width = i_width;
1781 *pi_height = i_height;
1786 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1788 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1789 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1791 frmsize.stepwise.max_width,
1792 frmsize.stepwise.max_height );
1793 if( f_fps >= f_fps_min &&
1794 frmsize.stepwise.max_width > *pi_width )
1796 *pi_width = frmsize.stepwise.max_width;
1797 *pi_height = frmsize.stepwise.max_height;
1805 /*****************************************************************************
1806 * OpenVideoDev: open and set up the video device and probe for capabilities
1807 *****************************************************************************/
1808 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1811 struct v4l2_cropcap cropcap;
1812 struct v4l2_crop crop;
1813 struct v4l2_format fmt;
1815 enum v4l2_buf_type buf_type;
1816 const char *psz_device = p_sys->psz_device;
1819 if( ( i_fd = utf8_open( psz_device, O_RDWR ) ) < 0 )
1821 msg_Err( p_obj, "cannot open device (%m)" );
1826 /* Note the v4l2_xxx functions are designed so that if they get passed an
1827 unknown fd, the will behave exactly as their regular xxx counterparts,
1828 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1829 custom cam format to normal formats conversion). Chances are big we will
1830 still fail then though, as normally v4l2_fd_open only fails if the
1831 device is not a v4l2 device. */
1832 if( p_sys->b_libv4l2 )
1835 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1836 if( libv4l2_fd != -1 )
1841 /* Tune the tuner */
1842 if( p_sys->i_frequency >= 0 )
1844 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1846 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1849 struct v4l2_frequency frequency;
1850 memset( &frequency, 0, sizeof( frequency ) );
1851 frequency.tuner = p_sys->i_cur_tuner;
1852 frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1853 frequency.frequency = p_sys->i_frequency / 62.5;
1854 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1856 msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1859 msg_Dbg( p_obj, "Tuner frequency set" );
1862 /* Set the tuner's audio mode */
1863 if( p_sys->i_audio_mode >= 0 )
1865 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1867 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1870 struct v4l2_tuner tuner;
1871 memset( &tuner, 0, sizeof( tuner ) );
1872 tuner.index = p_sys->i_cur_tuner;
1873 tuner.audmode = p_sys->i_audio_mode;
1874 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1876 msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1879 msg_Dbg( p_obj, "Tuner audio mode set" );
1882 /* Select standard */
1884 if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1886 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1888 msg_Err( p_obj, "cannot set standard (%m)" );
1891 if( v4l2_ioctl( i_fd, VIDIOC_G_STD, &p_sys->i_selected_standard_id ) < 0 )
1893 msg_Err( p_obj, "cannot get standard (%m). This should never happen!" );
1896 msg_Dbg( p_obj, "Set standard to (0x%"PRIx64"):", p_sys->i_selected_standard_id );
1898 for( i_standard = 0; i_standard<p_sys->i_standard; i_standard++)
1900 if( p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id )
1902 msg_Dbg( p_obj, " %s",
1903 p_sys->p_standards[i_standard].name );
1910 if( p_sys->i_selected_input >= p_sys->i_input )
1912 msg_Warn( p_obj, "invalid input. Using the default one" );
1913 p_sys->i_selected_input = 0;
1916 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1918 msg_Err( p_obj, "cannot set input (%m)" );
1922 /* Set audio input */
1924 if( p_sys->i_audio > 0 )
1926 if( p_sys->i_selected_audio_input < 0
1927 || p_sys->i_selected_audio_input >= p_sys->i_audio )
1929 msg_Warn( p_obj, "invalid audio input. Using the default one" );
1930 p_sys->i_selected_audio_input = 0;
1933 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1935 msg_Err( p_obj, "cannot set audio input (%m)" );
1938 msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1942 /* TODO: Move the resolution stuff up here */
1943 /* if MPEG encoder card, no need to do anything else after this */
1944 ControlList( p_obj, p_sys, i_fd,
1945 var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1946 SetAvailControlsByString( p_obj, p_sys, i_fd );
1948 /* Verify device support for the various IO methods */
1951 case IO_METHOD_READ:
1952 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1954 msg_Err( p_obj, "device does not support read i/o" );
1957 msg_Dbg( p_obj, "using read i/o" );
1960 case IO_METHOD_MMAP:
1961 case IO_METHOD_USERPTR:
1962 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1964 msg_Err( p_obj, "device does not support streaming i/o" );
1967 if( p_sys->io == IO_METHOD_MMAP )
1968 msg_Dbg( p_obj, "using streaming i/o (mmap)" );
1970 msg_Dbg( p_obj, "using streaming i/o (userptr)" );
1974 msg_Err( p_obj, "io method not supported" );
1978 /* Reset Cropping */
1979 memset( &cropcap, 0, sizeof(cropcap) );
1980 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1981 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1983 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1984 crop.c = cropcap.defrect; /* reset to default */
1985 if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
1987 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
1992 /* Cropping not supported. */
1995 /* Errors ignored. */
2002 /* Try and find default resolution if not specified */
2003 memset( &fmt, 0, sizeof(fmt) );
2004 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2006 if( p_sys->i_width <= 0 || p_sys->i_height <= 0 )
2008 /* Use current width and height settings */
2009 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
2011 msg_Err( p_obj, "Cannot get default width and height." );
2015 msg_Dbg( p_obj, "found default width and height of %ux%u",
2016 fmt.fmt.pix.width, fmt.fmt.pix.height );
2018 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2020 msg_Dbg( p_obj, "will try to find optimal width and height." );
2025 /* Use user specified width and height */
2026 msg_Dbg( p_obj, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
2027 fmt.fmt.pix.width = p_sys->i_width;
2028 fmt.fmt.pix.height = p_sys->i_height;
2031 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2035 demux_t *p_demux = (demux_t *) p_obj;
2037 /* Test and set Chroma */
2038 fmt.fmt.pix.pixelformat = 0;
2039 if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
2041 /* User specified chroma */
2042 const vlc_fourcc_t i_requested_fourcc =
2043 vlc_fourcc_GetCodecFromString( VIDEO_ES, p_sys->psz_requested_chroma );
2045 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2047 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
2049 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
2053 /* Try and set user chroma */
2054 bool b_error = !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat );
2055 if( !b_error && fmt.fmt.pix.pixelformat )
2057 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2059 fmt.fmt.pix.field = V4L2_FIELD_ANY;
2060 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2062 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2069 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
2070 fmt.fmt.pix.pixelformat = 0;
2074 /* If no user specified chroma, find best */
2075 /* This also decides if MPEG encoder card or not */
2076 if( !fmt.fmt.pix.pixelformat )
2079 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
2081 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
2082 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) )
2084 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2086 fmt.fmt.pix.field = V4L2_FIELD_ANY;
2087 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2089 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2092 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
2094 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
2099 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2101 if( p_sys->f_fps <= 0 )
2103 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
2104 fmt.fmt.pix.pixelformat );
2105 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
2107 uint32_t i_width, i_height;
2108 GetMaxDimensions( p_demux, i_fd,
2109 fmt.fmt.pix.pixelformat, p_sys->f_fps,
2110 &i_width, &i_height );
2111 if( i_width || i_height )
2113 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f "
2114 "of %ux%u", p_sys->f_fps, i_width, i_height );
2115 fmt.fmt.pix.width = i_width;
2116 fmt.fmt.pix.height = i_height;
2117 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2119 msg_Err( p_obj, "Cannot set size to optimal dimensions "
2120 "%ux%u", i_width, i_height );
2126 msg_Warn( p_obj, "Could not find optimal width and height, "
2127 "falling back to driver default." );
2132 p_sys->i_width = fmt.fmt.pix.width;
2133 p_sys->i_height = fmt.fmt.pix.height;
2135 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
2136 /* Print extra info */
2137 msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
2138 /* Check interlacing */
2139 switch( fmt.fmt.pix.field )
2141 case V4L2_FIELD_NONE:
2142 msg_Dbg( p_obj, "Interlacing setting: progressive" );
2144 case V4L2_FIELD_TOP:
2145 msg_Dbg( p_obj, "Interlacing setting: top field only" );
2147 case V4L2_FIELD_BOTTOM:
2148 msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
2150 case V4L2_FIELD_INTERLACED:
2151 msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2152 if( p_sys->i_selected_standard_id == V4L2_STD_NTSC )
2153 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2155 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2157 case V4L2_FIELD_SEQ_TB:
2158 msg_Dbg( p_obj, "Interlacing setting: sequential top bottom (TODO)" );
2160 case V4L2_FIELD_SEQ_BT:
2161 msg_Dbg( p_obj, "Interlacing setting: sequential bottom top (TODO)" );
2163 case V4L2_FIELD_ALTERNATE:
2164 msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
2165 p_sys->i_height = p_sys->i_height * 2;
2167 case V4L2_FIELD_INTERLACED_TB:
2168 msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
2169 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2171 case V4L2_FIELD_INTERLACED_BT:
2172 msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
2173 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2176 msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
2177 fmt.fmt.pix.field );
2181 /* Look up final fourcc */
2182 p_sys->i_fourcc = 0;
2183 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2185 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2187 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2188 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2189 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2190 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2191 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2196 /* Buggy driver paranoia */
2197 i_min = fmt.fmt.pix.width * 2;
2198 if( fmt.fmt.pix.bytesperline < i_min )
2199 fmt.fmt.pix.bytesperline = i_min;
2200 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2201 if( fmt.fmt.pix.sizeimage < i_min )
2202 fmt.fmt.pix.sizeimage = i_min;
2204 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2205 /* This is new in Linux 2.6.19 */
2206 /* List supported frame rates */
2207 struct v4l2_frmivalenum frmival;
2208 memset( &frmival, 0, sizeof(frmival) );
2209 frmival.pixel_format = fmt.fmt.pix.pixelformat;
2210 frmival.width = p_sys->i_width;
2211 frmival.height = p_sys->i_height;
2212 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2215 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2216 vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2217 msg_Dbg( p_obj, "supported frame intervals for %4s, %dx%d:",
2218 psz_fourcc, frmival.width, frmival.height );
2219 switch( frmival.type )
2221 case V4L2_FRMIVAL_TYPE_DISCRETE:
2224 msg_Dbg( p_obj, " supported frame interval: %d/%d",
2225 frmival.discrete.numerator,
2226 frmival.discrete.denominator );
2228 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2230 case V4L2_FRMIVAL_TYPE_STEPWISE:
2231 msg_Dbg( p_obj, " supported frame intervals: %d/%d to "
2232 "%d/%d using %d/%d increments",
2233 frmival.stepwise.min.numerator,
2234 frmival.stepwise.min.denominator,
2235 frmival.stepwise.max.numerator,
2236 frmival.stepwise.max.denominator,
2237 frmival.stepwise.step.numerator,
2238 frmival.stepwise.step.denominator );
2240 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2241 msg_Dbg( p_obj, " supported frame intervals: %d/%d to %d/%d",
2242 frmival.stepwise.min.numerator,
2243 frmival.stepwise.min.denominator,
2244 frmival.stepwise.max.numerator,
2245 frmival.stepwise.max.denominator );
2252 /* Init IO method */
2255 case IO_METHOD_READ:
2257 if( InitRead( p_obj, p_sys, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2260 case IO_METHOD_MMAP:
2261 if( InitMmap( p_obj, p_sys, i_fd ) != VLC_SUCCESS ) goto open_failed;
2264 case IO_METHOD_USERPTR:
2265 if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2276 es_fmt.video.i_width = p_sys->i_width;
2277 es_fmt.video.i_height = p_sys->i_height;
2279 /* Get aspect-ratio */
2280 es_fmt.video.i_aspect = p_sys->i_aspect;
2282 demux_t *p_demux = (demux_t *) p_obj;
2283 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2284 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2285 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2292 case IO_METHOD_READ:
2296 case IO_METHOD_MMAP:
2297 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2299 struct v4l2_buffer buf;
2301 memset( &buf, 0, sizeof(buf) );
2302 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2303 buf.memory = V4L2_MEMORY_MMAP;
2306 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2308 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2313 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2314 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2316 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2322 case IO_METHOD_USERPTR:
2323 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2325 struct v4l2_buffer buf;
2327 memset( &buf, 0, sizeof(buf) );
2328 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2329 buf.memory = V4L2_MEMORY_USERPTR;
2331 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2332 buf.length = p_sys->p_buffers[i].length;
2334 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2336 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2341 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2342 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2344 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2356 if( p_sys->f_fps >= 0.1 )
2358 msg_Dbg( p_obj, "User set fps=%f", p_sys->f_fps );
2364 if( i_fd >= 0 ) v4l2_close( i_fd );
2369 /*****************************************************************************
2370 * ProbeVideoDev: probe video for capabilities
2371 *****************************************************************************/
2372 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2373 const char *psz_device )
2380 if( ( i_fd = utf8_open( psz_device, O_RDWR ) ) < 0 )
2382 msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2387 /* Note the v4l2_xxx functions are designed so that if they get passed an
2388 unknown fd, the will behave exactly as their regular xxx counterparts,
2389 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2390 custom cam format to normal formats conversion). Chances are big we will
2391 still fail then though, as normally v4l2_fd_open only fails if the
2392 device is not a v4l2 device. */
2393 if( p_sys->b_libv4l2 )
2396 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2397 if( libv4l2_fd != -1 )
2402 /* Get device capabilites */
2404 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2406 msg_Err( p_obj, "cannot get video capabilities (%m)" );
2410 msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2411 p_sys->dev_cap.card,
2412 p_sys->dev_cap.driver,
2413 (p_sys->dev_cap.version >> 16) & 0xFF,
2414 (p_sys->dev_cap.version >> 8) & 0xFF,
2415 p_sys->dev_cap.version & 0xFF,
2416 p_sys->dev_cap.bus_info );
2418 msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capture, "
2422 ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
2423 ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
2424 ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' '),
2425 ( p_sys->dev_cap.capabilities & V4L2_CAP_RADIO ? 'X':' ') );
2427 msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2429 "(%c) Asynchronous",
2430 ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2431 ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2432 ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2434 if( p_sys->io == IO_METHOD_AUTO )
2436 if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
2437 p_sys->io = IO_METHOD_MMAP;
2438 else if( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE )
2439 p_sys->io = IO_METHOD_READ;
2441 msg_Err( p_obj, "No known I/O method supported" );
2444 if( p_sys->dev_cap.capabilities & V4L2_CAP_RDS_CAPTURE )
2445 msg_Dbg( p_obj, "device supports RDS" );
2447 #ifdef V4L2_CAP_HW_FREQ_SEEK
2448 if( p_sys->dev_cap.capabilities & V4L2_CAP_HW_FREQ_SEEK )
2449 msg_Dbg( p_obj, "device supports hardware frequency seeking" );
2452 if( p_sys->dev_cap.capabilities & V4L2_CAP_VBI_CAPTURE )
2453 msg_Dbg( p_obj, "device support raw VBI capture" );
2455 if( p_sys->dev_cap.capabilities & V4L2_CAP_SLICED_VBI_CAPTURE )
2456 msg_Dbg( p_obj, "device support sliced VBI capture" );
2458 /* Now, enumerate all the video inputs. This is useless at the moment
2459 since we have no way to present that info to the user except with
2462 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2464 struct v4l2_input t_input;
2465 memset( &t_input, 0, sizeof(t_input) );
2467 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2470 t_input.index = p_sys->i_input;
2473 free( p_sys->p_inputs );
2474 p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2475 if( !p_sys->p_inputs ) goto open_failed;
2477 for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2479 p_sys->p_inputs[i_index].index = i_index;
2481 if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2483 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2486 msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2488 p_sys->p_inputs[i_index].name,
2489 p_sys->p_inputs[i_index].type
2490 == V4L2_INPUT_TYPE_TUNER ?
2492 "External analog input",
2493 i_index == p_sys->i_selected_input ? '*' : ' ' );
2497 /* Probe video standards */
2498 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2500 struct v4l2_standard t_standards;
2501 t_standards.index = 0;
2502 p_sys->i_standard = 0;
2503 while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2505 p_sys->i_standard++;
2506 t_standards.index = p_sys->i_standard;
2509 free( p_sys->p_standards );
2510 p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2511 if( !p_sys->p_standards ) goto open_failed;
2513 for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2515 p_sys->p_standards[i_standard].index = i_standard;
2517 if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2519 msg_Err( p_obj, "cannot get video input standards (%m)" );
2522 msg_Dbg( p_obj, "video standard %i is: %s %c",
2524 p_sys->p_standards[i_standard].name,
2525 (p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id) ? '*' : ' ' );
2529 /* initialize the structures for the ioctls */
2530 for( i_index = 0; i_index < 32; i_index++ )
2532 p_sys->p_audios[i_index].index = i_index;
2535 /* Probe audio inputs */
2536 if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2538 while( p_sys->i_audio < 32 &&
2539 v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2541 if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2543 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2547 msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2549 p_sys->p_audios[p_sys->i_audio].name,
2550 p_sys->p_audios[p_sys->i_audio].capability &
2551 V4L2_AUDCAP_STEREO ?
2553 p_sys->p_audios[p_sys->i_audio].capability &
2555 "(Automatic Volume Level supported)" : "",
2556 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2562 /* List tuner caps */
2563 if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2565 struct v4l2_tuner tuner;
2566 memset( &tuner, 0, sizeof(tuner) );
2568 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2571 memset( &tuner, 0, sizeof(tuner) );
2572 tuner.index = p_sys->i_tuner;
2575 free( p_sys->p_tuners );
2576 p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2577 if( !p_sys->p_tuners ) goto open_failed;
2579 for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2581 p_sys->p_tuners[i_index].index = i_index;
2583 if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2585 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2588 msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2589 "frequency range: %.1f %s -> %.1f %s",
2591 p_sys->p_tuners[i_index].name,
2592 p_sys->p_tuners[i_index].type
2593 == V4L2_TUNER_RADIO ?
2594 "Radio" : "Analog TV",
2595 p_sys->p_tuners[i_index].rangelow * 62.5,
2596 p_sys->p_tuners[i_index].capability &
2597 V4L2_TUNER_CAP_LOW ?
2599 p_sys->p_tuners[i_index].rangehigh * 62.5,
2600 p_sys->p_tuners[i_index].capability &
2601 V4L2_TUNER_CAP_LOW ?
2604 struct v4l2_frequency frequency;
2605 memset( &frequency, 0, sizeof( frequency ) );
2606 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2608 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2611 msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2613 p_sys->p_tuners[i_index].name,
2614 frequency.frequency * 62.5,
2615 p_sys->p_tuners[i_index].capability &
2616 V4L2_TUNER_CAP_LOW ?
2621 /* Probe for available chromas */
2622 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2624 struct v4l2_fmtdesc codec;
2627 memset( &codec, 0, sizeof(codec) );
2628 codec.index = i_index;
2629 codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2631 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2634 codec.index = i_index;
2637 p_sys->i_codec = i_index;
2639 free( p_sys->p_codecs );
2640 p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2642 for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2644 p_sys->p_codecs[i_index].index = i_index;
2645 p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2647 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2649 msg_Err( p_obj, "cannot get codec description (%m)" );
2653 /* only print if vlc supports the format */
2654 char psz_fourcc_v4l2[5];
2655 memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2656 vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2658 bool b_codec_supported = false;
2659 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2661 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2663 b_codec_supported = true;
2666 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2667 vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2669 msg_Dbg( p_obj, "device supports chroma %4s [%s, %s]",
2671 p_sys->p_codecs[i_index].description,
2674 #ifdef VIDIOC_ENUM_FRAMESIZES
2675 /* This is new in Linux 2.6.19 */
2676 /* List valid frame sizes for this format */
2677 struct v4l2_frmsizeenum frmsize;
2678 memset( &frmsize, 0, sizeof(frmsize) );
2679 frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2680 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2682 /* Not all devices support this ioctl */
2683 msg_Warn( p_obj, "Unable to query for frame sizes" );
2687 switch( frmsize.type )
2689 case V4L2_FRMSIZE_TYPE_DISCRETE:
2693 " device supports size %dx%d",
2694 frmsize.discrete.width, frmsize.discrete.height );
2696 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2698 case V4L2_FRMSIZE_TYPE_STEPWISE:
2700 " device supports sizes %dx%d to %dx%d using %dx%d increments",
2701 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2702 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2703 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2705 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2707 " device supports all sizes %dx%d to %dx%d",
2708 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2709 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2716 if( !b_codec_supported )
2719 "device codec %4s (%s) not supported",
2721 p_sys->p_codecs[i_index].description );
2727 if( i_fd >= 0 ) v4l2_close( i_fd );
2732 if( i_fd >= 0 ) v4l2_close( i_fd );
2737 static void name2var( unsigned char *name )
2739 for( ; *name; name++ )
2740 *name = (*name == ' ') ? '_' : tolower( *name );
2743 /*****************************************************************************
2744 * Print a user-class v4l2 control's details, create the relevant variable,
2745 * change the value if needed.
2746 *****************************************************************************/
2747 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2748 struct v4l2_queryctrl queryctrl,
2749 bool b_reset, bool b_demux )
2751 struct v4l2_querymenu querymenu;
2758 vlc_value_t val, val2;
2760 if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2761 msg_Dbg( p_obj, " control is busy" );
2762 if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2763 msg_Dbg( p_obj, " control is read-only" );
2765 for( i = 0; controls[i].psz_name != NULL; i++ )
2766 if( controls[i].i_cid == queryctrl.id ) break;
2768 if( controls[i].psz_name )
2770 psz_name = strdup( controls[i].psz_name );
2771 char psz_cfg_name[40];
2772 sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2773 i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2774 var_Destroy( p_obj, psz_cfg_name );
2778 psz_name = strdup( (const char *)queryctrl.name );
2779 name2var( (unsigned char *)psz_name );
2783 switch( queryctrl.type )
2785 case V4L2_CTRL_TYPE_INTEGER:
2786 msg_Dbg( p_obj, " integer control" );
2788 " valid values: %d to %d by steps of %d",
2789 queryctrl.minimum, queryctrl.maximum,
2792 var_Create( p_obj, psz_name,
2793 VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2794 | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2795 val.i_int = queryctrl.minimum;
2796 var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2797 val.i_int = queryctrl.maximum;
2798 var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2799 val.i_int = queryctrl.step;
2800 var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2802 case V4L2_CTRL_TYPE_BOOLEAN:
2803 msg_Dbg( p_obj, " boolean control" );
2804 var_Create( p_obj, psz_name,
2805 VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2807 case V4L2_CTRL_TYPE_MENU:
2808 msg_Dbg( p_obj, " menu control" );
2809 var_Create( p_obj, psz_name,
2810 VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2811 | VLC_VAR_ISCOMMAND );
2812 memset( &querymenu, 0, sizeof( querymenu ) );
2813 for( i_mid = queryctrl.minimum;
2814 i_mid <= (unsigned)queryctrl.maximum;
2817 querymenu.index = i_mid;
2818 querymenu.id = queryctrl.id;
2819 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2821 msg_Dbg( p_obj, " %d: %s",
2822 querymenu.index, querymenu.name );
2823 val.i_int = querymenu.index;
2824 val2.psz_string = (char *)querymenu.name;
2825 var_Change( p_obj, psz_name,
2826 VLC_VAR_ADDCHOICE, &val, &val2 );
2830 case V4L2_CTRL_TYPE_BUTTON:
2831 msg_Dbg( p_obj, " button control" );
2832 var_Create( p_obj, psz_name,
2833 VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2835 case V4L2_CTRL_TYPE_CTRL_CLASS:
2836 msg_Dbg( p_obj, " control class" );
2837 var_Create( p_obj, psz_name, VLC_VAR_VOID );
2840 msg_Dbg( p_obj, " unknown control type (FIXME)" );
2845 switch( queryctrl.type )
2847 case V4L2_CTRL_TYPE_INTEGER:
2848 case V4L2_CTRL_TYPE_BOOLEAN:
2849 case V4L2_CTRL_TYPE_MENU:
2851 struct v4l2_control control;
2852 msg_Dbg( p_obj, " default value: %d",
2853 queryctrl.default_value );
2854 memset( &control, 0, sizeof( control ) );
2855 control.id = queryctrl.id;
2856 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2858 msg_Dbg( p_obj, " current value: %d", control.value );
2862 i_val = control.value;
2863 if( b_reset && queryctrl.default_value != control.value )
2865 msg_Dbg( p_obj, " reset value to default" );
2866 Control( p_obj, p_sys, i_fd, psz_name,
2867 queryctrl.id, queryctrl.default_value );
2872 Control( p_obj, p_sys, i_fd, psz_name,
2873 queryctrl.id, i_val );
2881 val.psz_string = (char *)queryctrl.name;
2882 var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2883 val.i_int = queryctrl.id;
2884 val2.psz_string = (char *)psz_name;
2885 var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2886 /* bad things happen changing MPEG mid-stream
2887 * so don't add to Ext Settings GUI */
2888 if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2889 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2891 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2894 var_SetBool( p_obj, psz_name, i_val );
2896 case VLC_VAR_INTEGER:
2897 var_SetInteger( p_obj, psz_name, i_val );
2902 msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2908 var_AddCallback( p_obj, psz_name,
2909 DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2911 var_AddCallback( p_obj, psz_name,
2912 AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2917 /*****************************************************************************
2918 * List all user-class v4l2 controls, set them to the user specified
2919 * value and create the relevant variables to enable runtime changes
2920 *****************************************************************************/
2921 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2922 bool b_reset, bool b_demux )
2924 struct v4l2_queryctrl queryctrl;
2927 memset( &queryctrl, 0, sizeof( queryctrl ) );
2929 /* A list of available controls (aka the variable name) will be
2930 * stored as choices in the "allcontrols" variable. We'll thus be able
2931 * to use those to create an appropriate interface
2932 * A list of available controls that can be changed mid-stream will
2933 * be stored in the "controls" variable */
2934 var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2935 var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2937 var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2939 /* Add a control to reset all controls to their default values */
2940 vlc_value_t val, val2;
2941 var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2942 val.psz_string = _( "Reset controls to default" );
2943 var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2945 val2.psz_string = (char *)"controls-reset";
2946 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2948 var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2950 var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2952 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2953 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2955 msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2957 /* List extended controls */
2958 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2959 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2961 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2963 msg_Dbg( p_obj, "%s", queryctrl.name );
2964 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2967 switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2969 case V4L2_CTRL_CLASS_USER:
2970 msg_Dbg( p_obj, "Available control: %s (%x)",
2971 queryctrl.name, queryctrl.id );
2973 case V4L2_CTRL_CLASS_MPEG:
2974 name2var( queryctrl.name );
2975 msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2976 queryctrl.name, queryctrl.id );
2979 msg_Dbg( p_obj, "Available private control: %s (%x)",
2980 queryctrl.name, queryctrl.id );
2983 ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
2984 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2989 msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
2991 /* List public controls */
2992 for( i_cid = V4L2_CID_BASE;
2993 i_cid < V4L2_CID_LASTP1;
2996 queryctrl.id = i_cid;
2997 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2999 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3001 msg_Dbg( p_obj, "Available control: %s (%x)",
3002 queryctrl.name, queryctrl.id );
3003 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3008 /* List private controls */
3009 for( i_cid = V4L2_CID_PRIVATE_BASE;
3013 queryctrl.id = i_cid;
3014 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3016 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3018 msg_Dbg( p_obj, "Available private control: %s (%x)",
3019 queryctrl.name, queryctrl.id );
3020 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3031 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
3034 char *psz_parser = p_sys->psz_set_ctrls;
3035 vlc_value_t val, text, name;
3037 if( psz_parser == NULL )
3040 if( *psz_parser == '{' )
3043 int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
3047 msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
3051 while( *psz_parser && *psz_parser != '}' )
3053 char *psz_delim, *psz_assign;
3055 while( *psz_parser == ',' || *psz_parser == ' ' )
3058 psz_delim = strchr( psz_parser, ',' );
3059 if( psz_delim == NULL )
3060 psz_delim = strchr( psz_parser, '}' );
3061 if( psz_delim == NULL )
3062 psz_delim = psz_parser + strlen( psz_parser );
3064 psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
3065 if( psz_assign == NULL )
3067 char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
3068 msg_Err( p_obj, "%s missing '='", psz_name );
3070 psz_parser = psz_delim + 1;
3075 i < val.p_list->i_count ;//&& psz_parser < psz_assign;
3078 const char *psz_var = text.p_list->p_values[i].psz_string;
3079 int i_cid = val.p_list->p_values[i].i_int;
3080 var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
3081 const char *psz_name = name.psz_string;
3083 int i_availstrlen = strlen( psz_name );
3084 int i_parsestrlen = psz_assign - psz_parser;
3085 int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
3087 if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
3089 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
3090 strtol( ++psz_assign, &psz_parser, 0) );
3092 free( name.psz_string );
3095 if( psz_parser < psz_assign )
3097 char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
3098 msg_Err( p_obj, "Control %s not available", psz_name );
3100 psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
3103 var_FreeList( &val, &text );
3106 /*****************************************************************************
3107 * Reset all user-class v4l2 controls to their default value
3108 *****************************************************************************/
3109 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
3111 struct v4l2_queryctrl queryctrl;
3113 memset( &queryctrl, 0, sizeof( queryctrl ) );
3115 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3116 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3118 /* Extended control API supported */
3119 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3120 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3122 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
3123 || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
3125 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3128 struct v4l2_control control;
3129 memset( &control, 0, sizeof( control ) );
3130 control.id = queryctrl.id;
3131 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3132 && queryctrl.default_value != control.value )
3135 for( i = 0; controls[i].psz_name != NULL; i++ )
3136 if( controls[i].i_cid == queryctrl.id ) break;
3137 name2var( queryctrl.name );
3138 Control( p_obj, p_sys, i_fd,
3139 controls[i].psz_name ? controls[i].psz_name
3140 : (const char *)queryctrl.name,
3141 queryctrl.id, queryctrl.default_value );
3143 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3149 /* public controls */
3150 for( i_cid = V4L2_CID_BASE;
3151 i_cid < V4L2_CID_LASTP1;
3154 queryctrl.id = i_cid;
3155 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3157 struct v4l2_control control;
3158 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3160 memset( &control, 0, sizeof( control ) );
3161 control.id = queryctrl.id;
3162 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3163 && queryctrl.default_value != control.value )
3166 for( i = 0; controls[i].psz_name != NULL; i++ )
3167 if( controls[i].i_cid == queryctrl.id ) break;
3168 name2var( queryctrl.name );
3169 Control( p_obj, p_sys, i_fd,
3170 controls[i].psz_name ? controls[i].psz_name
3171 : (const char *)queryctrl.name,
3172 queryctrl.id, queryctrl.default_value );
3177 /* private controls */
3178 for( i_cid = V4L2_CID_PRIVATE_BASE;
3182 queryctrl.id = i_cid;
3183 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3185 struct v4l2_control control;
3186 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3188 memset( &control, 0, sizeof( control ) );
3189 control.id = queryctrl.id;
3190 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3191 && queryctrl.default_value != control.value )
3193 name2var( queryctrl.name );
3194 Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3195 queryctrl.id, queryctrl.default_value );
3205 /*****************************************************************************
3206 * Issue user-class v4l2 controls
3207 *****************************************************************************/
3208 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3209 const char *psz_name, int i_cid, int i_value )
3212 struct v4l2_queryctrl queryctrl;
3213 struct v4l2_control control;
3214 struct v4l2_ext_control ext_control;
3215 struct v4l2_ext_controls ext_controls;
3220 memset( &queryctrl, 0, sizeof( queryctrl ) );
3222 queryctrl.id = i_cid;
3224 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3225 || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3227 msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3228 return VLC_EGENERIC;
3231 memset( &control, 0, sizeof( control ) );
3232 memset( &ext_control, 0, sizeof( ext_control ) );
3233 memset( &ext_controls, 0, sizeof( ext_controls ) );
3235 ext_control.id = i_cid;
3236 ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3237 ext_controls.count = 1;
3238 ext_controls.controls = &ext_control;
3242 if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3244 ext_control.value = i_value;
3245 if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3247 control.value = i_value;
3248 if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3250 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3251 psz_name, i_cid, i_value );
3252 return VLC_EGENERIC;
3254 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3258 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3259 control.value = ext_control.value;
3266 msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3267 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3270 val.b_bool = control.value;
3271 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3272 var_TriggerCallback( p_obj, "controls-update" );
3274 case VLC_VAR_INTEGER:
3275 val.i_int = control.value;
3276 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3277 var_TriggerCallback( p_obj, "controls-update" );
3284 /*****************************************************************************
3285 * On the fly change settings callback
3286 *****************************************************************************/
3287 static int DemuxControlCallback( vlc_object_t *p_this,
3288 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3292 demux_t *p_demux = (demux_t*)p_this;
3293 demux_sys_t *p_sys = p_demux->p_sys;
3294 int i_cid = (long int)p_data;
3296 int i_fd = p_sys->i_fd;
3299 return VLC_EGENERIC;
3301 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3303 return VLC_EGENERIC;
3306 static int DemuxControlResetCallback( vlc_object_t *p_this,
3307 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3309 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3310 demux_t *p_demux = (demux_t*)p_this;
3311 demux_sys_t *p_sys = p_demux->p_sys;
3313 int i_fd = p_sys->i_fd;
3316 return VLC_EGENERIC;
3318 ControlReset( p_this, p_sys, i_fd );
3320 return VLC_EGENERIC;
3323 static int AccessControlCallback( vlc_object_t *p_this,
3324 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3328 access_t *p_access = (access_t *)p_this;
3329 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3330 int i_cid = (long int)p_data;
3332 int i_fd = p_sys->i_fd;
3335 return VLC_EGENERIC;
3337 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3339 return VLC_EGENERIC;
3342 static int AccessControlResetCallback( vlc_object_t *p_this,
3343 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3345 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3346 access_t *p_access = (access_t *)p_this;
3347 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3349 int i_fd = p_sys->i_fd;
3352 return VLC_EGENERIC;
3354 ControlReset( p_this, p_sys, i_fd );
3356 return VLC_EGENERIC;