git.sesse.net Git - vlc/blob - modules/access/v4l2.c

   1 /*****************************************************************************
   2  * v4l2.c : Video4Linux2 input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002-2009 the VideoLAN team
   5  * $Id$
   6  *
   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>
  11  *
  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.
  16  *
  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.
  21  *
  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  *****************************************************************************/
  26
  27 /*
  28  * Sections based on the reference V4L2 capture example at
  29  * http://v4l2spec.bytesex.org/spec/capture-example.html
  30  */
  31
  32 /*****************************************************************************
  33  * Preamble
  34  *****************************************************************************/
  35
  36 #ifdef HAVE_CONFIG_H
  37 # include "config.h"
  38 #endif
  39
  40 #include <vlc_common.h>
  41 #include <vlc_plugin.h>
  42 #include <vlc_access.h>
  43 #include <vlc_charset.h>
  44 #include <vlc_fs.h>
  45 #include <vlc_demux.h>
  46 #include <vlc_input.h>
  47
  48 #include <ctype.h>
  49 #include <errno.h>
  50 #include <fcntl.h>
  51 #include <sys/ioctl.h>
  52 #include <sys/mman.h>
  53
  54 #include <linux/videodev2.h>
  55
  56 #include <poll.h>
  57
  58 #ifdef HAVE_LIBV4L2
  59 #   include <libv4l2.h>
  60 #endif
  61
  62 /*****************************************************************************
  63  * Module descriptior
  64  *****************************************************************************/
  65
  66 static int  DemuxOpen ( vlc_object_t * );
  67 static void DemuxClose( vlc_object_t * );
  68 static int  AccessOpen ( vlc_object_t * );
  69 static void AccessClose( vlc_object_t * );
  70
  71 #define STANDARD_TEXT N_( "Standard" )
  72 #define STANDARD_LONGTEXT N_( \
  73     "Video standard (Default, SECAM, PAL, or NTSC)." )
  74 #define CHROMA_TEXT N_("Video input chroma format")
  75 #define CHROMA_LONGTEXT N_( \
  76     "Force the Video4Linux2 video device to use a specific chroma format " \
  77     "(eg. I420 or I422 for raw images, MJPG for M-JPEG compressed input) " \
  78     "(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
  79     "I41N, I422, I420, I411, I410, MJPG)")
  80 #define INPUT_TEXT N_( "Input" )
  81 #define INPUT_LONGTEXT N_( \
  82     "Input of the card to use (see debug)." )
  83 #define AUDIO_INPUT_TEXT N_( "Audio input" )
  84 #define AUDIO_INPUT_LONGTEXT N_( \
  85     "Audio input of the card to use (see debug)." )
  86 #define IOMETHOD_TEXT N_( "IO Method" )
  87 #define IOMETHOD_LONGTEXT N_( \
  88     "IO Method (READ, MMAP, USERPTR)." )
  89 #define WIDTH_TEXT N_( "Width" )
  90 #define WIDTH_LONGTEXT N_( \
  91     "Force width (-1 for autodetect, 0 for driver default)." )
  92 #define HEIGHT_TEXT N_( "Height" )
  93 #define HEIGHT_LONGTEXT N_( \
  94     "Force height (-1 for autodetect, 0 for driver default)." )
  95 #define FPS_TEXT N_( "Framerate" )
  96 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
  97     "(0 for autodetect)." )
  98
  99 #ifdef HAVE_LIBV4L2
 100 #define LIBV4L2_TEXT N_( "Use libv4l2" )
 101 #define LIBV4L2_LONGTEXT N_( \
 102     "Force usage of the libv4l2 wrapper." )
 103 #endif
 104
 105 #define CTRL_RESET_TEXT N_( "Reset v4l2 controls" )
 106 #define CTRL_RESET_LONGTEXT N_( \
 107     "Reset controls to defaults provided by the v4l2 driver." )
 108 #define BRIGHTNESS_TEXT N_( "Brightness" )
 109 #define BRIGHTNESS_LONGTEXT N_( \
 110     "Brightness of the video input (if supported by the v4l2 driver)." )
 111 #define CONTRAST_TEXT N_( "Contrast" )
 112 #define CONTRAST_LONGTEXT N_( \
 113     "Contrast of the video input (if supported by the v4l2 driver)." )
 114 #define SATURATION_TEXT N_( "Saturation" )
 115 #define SATURATION_LONGTEXT N_( \
 116     "Saturation of the video input (if supported by the v4l2 driver)." )
 117 #define HUE_TEXT N_( "Hue" )
 118 #define HUE_LONGTEXT N_( \
 119     "Hue of the video input (if supported by the v4l2 driver)." )
 120 #define BLACKLEVEL_TEXT N_( "Black level" )
 121 #define BLACKLEVEL_LONGTEXT N_( \
 122     "Black level of the video input (if supported by the v4l2 driver)." )
 123 #define AUTOWHITEBALANCE_TEXT N_( "Auto white balance" )
 124 #define AUTOWHITEBALANCE_LONGTEXT N_( \
 125     "Automatically set the white balance of the video input " \
 126     "(if supported by the v4l2 driver)." )
 127 #define DOWHITEBALANCE_TEXT N_( "Do white balance" )
 128 #define DOWHITEBALANCE_LONGTEXT N_( \
 129     "Trigger a white balancing action, useless if auto white balance is " \
 130     "activated (if supported by the v4l2 driver)." )
 131 #define REDBALANCE_TEXT N_( "Red balance" )
 132 #define REDBALANCE_LONGTEXT N_( \
 133     "Red balance of the video input (if supported by the v4l2 driver)." )
 134 #define BLUEBALANCE_TEXT N_( "Blue balance" )
 135 #define BLUEBALANCE_LONGTEXT N_( \
 136     "Blue balance of the video input (if supported by the v4l2 driver)." )
 137 #define GAMMA_TEXT N_( "Gamma" )
 138 #define GAMMA_LONGTEXT N_( \
 139     "Gamma of the video input (if supported by the v4l2 driver)." )
 140 #define EXPOSURE_TEXT N_( "Exposure" )
 141 #define EXPOSURE_LONGTEXT N_( \
 142     "Exposure of the video input (if supported by the v4L2 driver)." )
 143 #define AUTOGAIN_TEXT N_( "Auto gain" )
 144 #define AUTOGAIN_LONGTEXT N_( \
 145     "Automatically set the video input's gain (if supported by the " \
 146     "v4l2 driver)." )
 147 #define GAIN_TEXT N_( "Gain" )
 148 #define GAIN_LONGTEXT N_( \
 149     "Video input's gain (if supported by the v4l2 driver)." )
 150 #define HFLIP_TEXT N_( "Horizontal flip" )
 151 #define HFLIP_LONGTEXT N_( \
 152     "Flip the video horizontally (if supported by the v4l2 driver)." )
 153 #define VFLIP_TEXT N_( "Vertical flip" )
 154 #define VFLIP_LONGTEXT N_( \
 155     "Flip the video vertically (if supported by the v4l2 driver)." )
 156 #define HCENTER_TEXT N_( "Horizontal centering" )
 157 #define HCENTER_LONGTEXT N_( \
 158     "Set the camera's horizontal centering (if supported by the v4l2 driver)." )
 159 #define VCENTER_TEXT N_( "Vertical centering" )
 160 #define VCENTER_LONGTEXT N_( \
 161     "Set the camera's vertical centering (if supported by the v4l2 driver)." )
 162
 163 #define AUDIO_VOLUME_TEXT N_( "Volume" )
 164 #define AUDIO_VOLUME_LONGTEXT N_( \
 165     "Volume of the audio input (if supported by the v4l2 driver)." )
 166 #define AUDIO_BALANCE_TEXT N_( "Balance" )
 167 #define AUDIO_BALANCE_LONGTEXT N_( \
 168     "Balance of the audio input (if supported by the v4l2 driver)." )
 169 #define AUDIO_MUTE_TEXT N_( "Mute" )
 170 #define AUDIO_MUTE_LONGTEXT N_( \
 171     "Mute audio input (if supported by the v4l2 driver)." )
 172 #define AUDIO_BASS_TEXT N_( "Bass" )
 173 #define AUDIO_BASS_LONGTEXT N_( \
 174     "Bass level of the audio input (if supported by the v4l2 driver)." )
 175 #define AUDIO_TREBLE_TEXT N_( "Treble" )
 176 #define AUDIO_TREBLE_LONGTEXT N_( \
 177     "Treble level of the audio input (if supported by the v4l2 driver)." )
 178 #define AUDIO_LOUDNESS_TEXT N_( "Loudness" )
 179 #define AUDIO_LOUDNESS_LONGTEXT N_( \
 180     "Loudness of the audio input (if supported by the v4l2 driver)." )
 181
 182 #define CACHING_TEXT N_("Caching value in ms")
 183 #define CACHING_LONGTEXT N_( \
 184     "Caching value for V4L2 captures. This " \
 185     "value should be set in milliseconds." )
 186 #define S_CTRLS_TEXT N_("v4l2 driver controls")
 187 #define S_CTRLS_LONGTEXT N_( \
 188     "Set the v4l2 driver controls to the values specified using a comma " \
 189     "separated list optionally encapsulated by curly braces " \
 190     "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
 191     "To list available controls, increase verbosity (-vvv) " \
 192     "or use the v4l2-ctl application." )
 193
 194 #define TUNER_TEXT N_("Tuner id")
 195 #define TUNER_LONGTEXT N_( \
 196     "Tuner id (see debug output)." )
 197 #define FREQUENCY_TEXT N_("Frequency")
 198 #define FREQUENCY_LONGTEXT N_( \
 199     "Tuner frequency in Hz or kHz (see debug output)" )
 200 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
 201 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
 202     "Tuner audio mono/stereo and track selection." )
 203
 204 #define AUDIO_DEPRECATED_ERROR N_( \
 205     "Alsa or OSS audio capture in the v4l2 access is deprecated. " \
 206     "please use 'v4l2:/""/ :input-slave=alsa:/""/' or " \
 207     "'v4l2:/""/ :input-slave=oss:/""/' instead." )
 208
 209 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
 210 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
 211
 212 typedef enum {
 213     IO_METHOD_AUTO,
 214     IO_METHOD_READ,
 215     IO_METHOD_MMAP,
 216     IO_METHOD_USERPTR,
 217 } io_method;
 218
 219 static const int i_standards_list[] =
 220     { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC,
 221       V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
 222       V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
 223       V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
 224       V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP, V4L2_STD_NTSC_443,
 225       V4L2_STD_NTSC_M_KR,
 226       V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G,
 227       V4L2_STD_SECAM_H, V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1,
 228       V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
 229       V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
 230       };
 231 static const char *const psz_standards_list_text[] =
 232     { N_("Default"), "SECAM", "PAL",  "NTSC",
 233       "PAL_B", "PAL_B1", "PAL_G", "PAL_H", "PAL_I", "PAL_D",
 234       "PAL_D1", "PAL_K", "PAL_M", "PAL_N", "PAL_Nc", "PAL_60",
 235       "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR",
 236       "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H", "SECAM_K",
 237       "SECAM_K1", "SECAM_L", "SECAM_LC",
 238       "ATSC_8_VSB", "ATSC_16_VSB"
 239     };
 240
 241 static const int i_iomethod_list[] =
 242     { IO_METHOD_AUTO, IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
 243 static const char *const psz_iomethod_list_text[] =
 244     { N_("AUTO"), N_("READ"), N_("MMAP"),  N_("USERPTR") };
 245
 246 static const int i_tuner_audio_modes_list[] =
 247     { V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
 248       V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
 249       V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
 250 static const char *const psz_tuner_audio_modes_list_text[] =
 251     { N_( "Mono" ),
 252       N_( "Stereo" ),
 253       N_( "Primary language (Analog TV tuners only)" ),
 254       N_( "Secondary language (Analog TV tuners only)" ),
 255       N_( "Second audio program (Analog TV tuners only)" ),
 256       N_( "Primary language left, Secondary language right" ) };
 257
 258 #define V4L2_DEFAULT "/dev/video0"
 259 #define CFG_PREFIX "v4l2-"
 260
 261 #ifdef HAVE_MAEMO
 262 # define DEFAULT_WIDTH  640
 263 # define DEFAULT_HEIGHT 492
 264 #endif
 265
 266 #ifndef DEFAULT_WIDTH
 267 # define DEFAULT_WIDTH  (-1)
 268 # define DEFAULT_HEIGHT (-1)
 269 #endif
 270
 271 vlc_module_begin ()
 272     set_shortname( N_("Video4Linux2") )
 273     set_description( N_("Video4Linux2 input") )
 274     set_category( CAT_INPUT )
 275     set_subcategory( SUBCAT_INPUT_ACCESS )
 276
 277     set_section( N_( "Video input" ), NULL )
 278     add_integer( CFG_PREFIX "standard", 0, NULL, STANDARD_TEXT,
 279                  STANDARD_LONGTEXT, false )
 280         change_integer_list( i_standards_list, psz_standards_list_text, NULL )
 281     add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 282                 true )
 283     add_integer( CFG_PREFIX "input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
 284                 true )
 285     add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
 286                  AUDIO_INPUT_LONGTEXT, true )
 287     add_integer( CFG_PREFIX "io", IO_METHOD_AUTO, NULL, IOMETHOD_TEXT,
 288                  IOMETHOD_LONGTEXT, true )
 289         change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL )
 290     add_integer( CFG_PREFIX "width", DEFAULT_WIDTH, NULL, WIDTH_TEXT,
 291                 WIDTH_LONGTEXT, true )
 292     add_integer( CFG_PREFIX "height", DEFAULT_HEIGHT, NULL, HEIGHT_TEXT,
 293                 HEIGHT_LONGTEXT, true )
 294     add_string( CFG_PREFIX "aspect-ratio", "4:3", NULL, ASPECT_TEXT,
 295               ASPECT_LONGTEXT, true )
 296     add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
 297     add_integer( CFG_PREFIX "caching", 50 /* ms */, NULL,
 298                 CACHING_TEXT, CACHING_LONGTEXT, true )
 299 #ifdef HAVE_LIBV4L2
 300     add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
 301 #endif
 302
 303     set_section( N_( "Tuner" ), NULL )
 304     add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
 305                  true )
 306     add_integer( CFG_PREFIX "tuner-frequency", -1, NULL, FREQUENCY_TEXT,
 307                  FREQUENCY_LONGTEXT, true )
 308     add_integer( CFG_PREFIX "tuner-audio-mode", -1, NULL, TUNER_AUDIO_MODE_TEXT,
 309                  TUNER_AUDIO_MODE_LONGTEXT, true )
 310         change_integer_list( i_tuner_audio_modes_list,
 311                              psz_tuner_audio_modes_list_text, 0 )
 312
 313     set_section( N_( "Controls" ),
 314                  N_( "v4l2 driver controls, if supported by your v4l2 driver." ) )
 315     add_bool( CFG_PREFIX "controls-reset", false, NULL, CTRL_RESET_TEXT,
 316               CTRL_RESET_LONGTEXT, true )
 317     add_integer( CFG_PREFIX "brightness", -1, NULL, BRIGHTNESS_TEXT,
 318                  BRIGHTNESS_LONGTEXT, true )
 319     add_integer( CFG_PREFIX "contrast", -1, NULL, CONTRAST_TEXT,
 320                  CONTRAST_LONGTEXT, true )
 321     add_integer( CFG_PREFIX "saturation", -1, NULL, SATURATION_TEXT,
 322                  SATURATION_LONGTEXT, true )
 323     add_integer( CFG_PREFIX "hue", -1, NULL, HUE_TEXT,
 324                  HUE_LONGTEXT, true )
 325     add_integer( CFG_PREFIX "black-level", -1, NULL, BLACKLEVEL_TEXT,
 326                  BLACKLEVEL_LONGTEXT, true )
 327     add_integer( CFG_PREFIX "auto-white-balance", -1, NULL,
 328                  AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
 329     add_integer( CFG_PREFIX "do-white-balance", -1, NULL, DOWHITEBALANCE_TEXT,
 330                  DOWHITEBALANCE_LONGTEXT, true )
 331     add_integer( CFG_PREFIX "red-balance", -1, NULL, REDBALANCE_TEXT,
 332                  REDBALANCE_LONGTEXT, true )
 333     add_integer( CFG_PREFIX "blue-balance", -1, NULL, BLUEBALANCE_TEXT,
 334                  BLUEBALANCE_LONGTEXT, true )
 335     add_integer( CFG_PREFIX "gamma", -1, NULL, GAMMA_TEXT,
 336                  GAMMA_LONGTEXT, true )
 337     add_integer( CFG_PREFIX "exposure", -1, NULL, EXPOSURE_TEXT,
 338                  EXPOSURE_LONGTEXT, true )
 339     add_integer( CFG_PREFIX "autogain", -1, NULL, AUTOGAIN_TEXT,
 340                  AUTOGAIN_LONGTEXT, true )
 341     add_integer( CFG_PREFIX "gain", -1, NULL, GAIN_TEXT,
 342                  GAIN_LONGTEXT, true )
 343     add_integer( CFG_PREFIX "hflip", -1, NULL, HFLIP_TEXT,
 344                  HFLIP_LONGTEXT, true )
 345     add_integer( CFG_PREFIX "vflip", -1, NULL, VFLIP_TEXT,
 346                  VFLIP_LONGTEXT, true )
 347     add_integer( CFG_PREFIX "hcenter", -1, NULL, HCENTER_TEXT,
 348                  HCENTER_LONGTEXT, true )
 349     add_integer( CFG_PREFIX "vcenter", -1, NULL, VCENTER_TEXT,
 350                  VCENTER_LONGTEXT, true )
 351     add_integer( CFG_PREFIX "audio-volume", -1, NULL, AUDIO_VOLUME_TEXT,
 352                 AUDIO_VOLUME_LONGTEXT, true )
 353     add_integer( CFG_PREFIX "audio-balance", -1, NULL, AUDIO_BALANCE_TEXT,
 354                 AUDIO_BALANCE_LONGTEXT, true )
 355     add_bool( CFG_PREFIX "audio-mute", false, NULL, AUDIO_MUTE_TEXT,
 356               AUDIO_MUTE_LONGTEXT, true )
 357     add_integer( CFG_PREFIX "audio-bass", -1, NULL, AUDIO_BASS_TEXT,
 358                 AUDIO_BASS_LONGTEXT, true )
 359     add_integer( CFG_PREFIX "audio-treble", -1, NULL, AUDIO_TREBLE_TEXT,
 360                 AUDIO_TREBLE_LONGTEXT, true )
 361     add_integer( CFG_PREFIX "audio-loudness", -1, NULL, AUDIO_LOUDNESS_TEXT,
 362                 AUDIO_LOUDNESS_LONGTEXT, true )
 363     add_string( CFG_PREFIX "set-ctrls", NULL, NULL, S_CTRLS_TEXT,
 364               S_CTRLS_LONGTEXT, true )
 365
 366     add_obsolete_string( CFG_PREFIX "dev" )
 367
 368     add_obsolete_string( CFG_PREFIX "adev" )
 369     add_obsolete_integer( CFG_PREFIX "audio-method" )
 370     add_obsolete_bool( CFG_PREFIX "stereo" )
 371     add_obsolete_integer( CFG_PREFIX "samplerate" )
 372
 373     add_shortcut( "v4l2" )
 374     set_capability( "access_demux", 10 )
 375     set_callbacks( DemuxOpen, DemuxClose )
 376
 377     add_submodule ()
 378     add_shortcut( "v4l2" )
 379     add_shortcut( "v4l2c" )
 380     set_description( N_("Video4Linux2 Compressed A/V") )
 381     set_capability( "access", 0 )
 382     /* use these when open as access_demux fails; VLC will use another demux */
 383     set_callbacks( AccessOpen, AccessClose )
 384
 385 vlc_module_end ()
 386
 387 /*****************************************************************************
 388  * Access: local prototypes
 389  *****************************************************************************/
 390
 391 static void CommonClose( vlc_object_t *, demux_sys_t * );
 392 static void ParseMRL( demux_sys_t *, char *, vlc_object_t * );
 393 static void GetV4L2Params( demux_sys_t *, vlc_object_t * );
 394 static void SetAvailControlsByString( vlc_object_t *, demux_sys_t *, int );
 395
 396 static int DemuxControl( demux_t *, int, va_list );
 397 static int AccessControl( access_t *, int, va_list );
 398
 399 static int Demux( demux_t * );
 400 static block_t *AccessRead( access_t * );
 401 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len );
 402
 403 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys );
 404 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
 405
 406 static bool IsPixelFormatSupported( demux_t *p_demux,
 407                                           unsigned int i_pixelformat );
 408
 409 static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
 410 static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
 411                                  const char *psz_device );
 412
 413 static int ControlList( vlc_object_t *, demux_sys_t *, int , bool, bool );
 414 static int Control( vlc_object_t *, demux_sys_t *, int i_fd,
 415                     const char *psz_name, int i_cid, int i_value );
 416
 417 static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
 418                                  vlc_value_t oldval, vlc_value_t newval,
 419                                  void *p_data );
 420 static int DemuxControlResetCallback( vlc_object_t *p_this, const char *psz_var,
 421                                       vlc_value_t oldval, vlc_value_t newval,
 422                                       void *p_data );
 423 static int AccessControlCallback( vlc_object_t *p_this, const char *psz_var,
 424                                   vlc_value_t oldval, vlc_value_t newval,
 425                                   void *p_data );
 426 static int AccessControlResetCallback( vlc_object_t *p_this,
 427                                        const char *psz_var, vlc_value_t oldval,
 428                                        vlc_value_t newval, void *p_data );
 429
 430 static const struct
 431 {
 432     unsigned int i_v4l2;
 433     vlc_fourcc_t i_fourcc;
 434     int i_rmask;
 435     int i_gmask;
 436     int i_bmask;
 437 } v4l2chroma_to_fourcc[] =
 438 {
 439     /* Raw data types */
 440     { V4L2_PIX_FMT_GREY,    VLC_CODEC_GREY, 0, 0, 0 },
 441     { V4L2_PIX_FMT_HI240,   VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
 442     { V4L2_PIX_FMT_RGB555,  VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
 443     { V4L2_PIX_FMT_RGB565,  VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
 444     /* Won't work since we don't know how to handle such gmask values
 445      * correctly
 446     { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
 447     { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
 448     */
 449     { V4L2_PIX_FMT_BGR24,   VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
 450     { V4L2_PIX_FMT_RGB24,   VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
 451     { V4L2_PIX_FMT_BGR32,   VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
 452     { V4L2_PIX_FMT_RGB32,   VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
 453     { V4L2_PIX_FMT_YUYV,    VLC_CODEC_YUYV, 0, 0, 0 },
 454     { V4L2_PIX_FMT_UYVY,    VLC_CODEC_UYVY, 0, 0, 0 },
 455     { V4L2_PIX_FMT_Y41P,    VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
 456     { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
 457     { V4L2_PIX_FMT_YVU420,  VLC_CODEC_YV12, 0, 0, 0 },
 458     { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
 459     { V4L2_PIX_FMT_YUV410,  VLC_CODEC_I410, 0, 0, 0 },
 460
 461     /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
 462      * by VLC */
 463     { V4L2_PIX_FMT_YUV420,  VLC_CODEC_I420, 0, 0, 0 },
 464     /* FIXME { V4L2_PIX_FMT_RGB444,  VLC_CODEC_RGB32 }, */
 465
 466     /* Compressed data types */
 467     { V4L2_PIX_FMT_MJPEG,   VLC_CODEC_MJPG, 0, 0, 0 },
 468     { V4L2_PIX_FMT_JPEG,    VLC_CODEC_JPEG, 0, 0, 0 },
 469 #if 0
 470     { V4L2_PIX_FMT_DV,      VLC_FOURCC('?','?','?','?') },
 471     { V4L2_PIX_FMT_MPEG,    VLC_FOURCC('?','?','?','?') },
 472 #endif
 473     { 0, 0, 0, 0, 0 }
 474 };
 475
 476 /**
 477  * List of V4L2 chromas were confident enough to use as fallbacks if the
 478  * user hasn't provided a --v4l2-chroma value.
 479  *
 480  * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
 481  */
 482 static const uint32_t p_chroma_fallbacks[] =
 483 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
 484   V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
 485   V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
 486
 487 static const struct
 488 {
 489     const char *psz_name;
 490     unsigned int i_cid;
 491 } controls[] =
 492 {
 493     { "brightness", V4L2_CID_BRIGHTNESS },
 494     { "contrast", V4L2_CID_CONTRAST },
 495     { "saturation", V4L2_CID_SATURATION },
 496     { "hue", V4L2_CID_HUE },
 497     { "audio-volume", V4L2_CID_AUDIO_VOLUME },
 498     { "audio-balance", V4L2_CID_AUDIO_BALANCE },
 499     { "audio-bass", V4L2_CID_AUDIO_BASS },
 500     { "audio-treble", V4L2_CID_AUDIO_TREBLE },
 501     { "audio-mute", V4L2_CID_AUDIO_MUTE },
 502     { "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
 503     { "black-level", V4L2_CID_BLACK_LEVEL },
 504     { "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
 505     { "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
 506     { "red-balance", V4L2_CID_RED_BALANCE },
 507     { "blue-balance", V4L2_CID_BLUE_BALANCE },
 508     { "gamma", V4L2_CID_GAMMA },
 509     { "exposure", V4L2_CID_EXPOSURE },
 510     { "autogain", V4L2_CID_AUTOGAIN },
 511     { "gain", V4L2_CID_GAIN },
 512     { "hflip", V4L2_CID_HFLIP },
 513     { "vflip", V4L2_CID_VFLIP },
 514     { "hcenter", V4L2_CID_HCENTER },
 515     { "vcenter", V4L2_CID_VCENTER },
 516     { NULL, 0 }
 517 };
 518
 519 struct buffer_t
 520 {
 521     void *  start;
 522     size_t  length;
 523 };
 524
 525 struct demux_sys_t
 526 {
 527     char *psz_device;  /* Main device from MRL */
 528     int  i_fd;
 529
 530     char *psz_requested_chroma;
 531
 532     /* Video */
 533     io_method io;
 534
 535     int i_cache;
 536
 537     struct v4l2_capability dev_cap;
 538
 539     int i_input;
 540     struct v4l2_input *p_inputs;
 541     int i_selected_input;
 542
 543     int i_standard;
 544     struct v4l2_standard *p_standards;
 545     v4l2_std_id i_selected_standard_id;
 546
 547     int i_audio;
 548     /* V4L2 devices cannot have more than 32 audio inputs */
 549     struct v4l2_audio p_audios[32];
 550     int i_selected_audio_input;
 551
 552     int i_tuner;
 553     struct v4l2_tuner *p_tuners;
 554
 555     int i_codec;
 556     struct v4l2_fmtdesc *p_codecs;
 557
 558     struct buffer_t *p_buffers;
 559     unsigned int i_nbuffers;
 560
 561     int i_width;
 562     int i_height;
 563     unsigned int i_aspect;
 564     float f_fps;            /* <= 0.0 mean to grab at full rate */
 565     mtime_t i_video_pts;    /* only used when f_fps > 0 */
 566     int i_fourcc;
 567     uint32_t i_block_flags;
 568
 569     es_out_id_t *p_es;
 570
 571     /* Tuner */
 572     int i_cur_tuner;
 573     int i_frequency;
 574     int i_audio_mode;
 575
 576     /* Controls */
 577     char *psz_set_ctrls;
 578
 579
 580 #ifdef HAVE_LIBV4L2
 581     /* */
 582     int (*pf_open)(const char *, int, ...);
 583     int (*pf_close)( int );
 584     int (*pf_dup)( int );
 585     int (*pf_ioctl)( int, unsigned long int, ... );
 586     ssize_t (*pf_read)( int, void *, size_t );
 587     void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
 588     int (*pf_munmap)( void *, size_t );
 589     bool b_libv4l2;
 590 #endif
 591 };
 592
 593 #ifdef HAVE_LIBV4L2
 594 static void use_kernel_v4l2( demux_sys_t *p_sys )
 595 {
 596     p_sys->pf_open = vlc_open;
 597     p_sys->pf_close = close;
 598     p_sys->pf_dup = dup;
 599     p_sys->pf_ioctl = ioctl;
 600     p_sys->pf_read = read;
 601     p_sys->pf_mmap = mmap;
 602     p_sys->pf_munmap = munmap;
 603     p_sys->b_libv4l2 = false;
 604 }
 605
 606 static void use_libv4l2( demux_sys_t *p_sys )
 607 {
 608     p_sys->pf_open = v4l2_open;
 609     p_sys->pf_close = v4l2_close;
 610     p_sys->pf_dup = v4l2_dup;
 611     p_sys->pf_ioctl = v4l2_ioctl;
 612     p_sys->pf_read = v4l2_read;
 613     p_sys->pf_mmap = v4l2_mmap;
 614     p_sys->pf_munmap = v4l2_munmap;
 615     p_sys->b_libv4l2 = true;
 616 }
 617
 618 #   define v4l2_open (p_sys->pf_open)
 619 #   define v4l2_close (p_sys->pf_close)
 620 #   define v4l2_dup (p_sys->pf_dup)
 621 #   define v4l2_ioctl (p_sys->pf_ioctl)
 622 #   define v4l2_read (p_sys->pf_read)
 623 #   define v4l2_mmap (p_sys->pf_mmap)
 624 #   define v4l2_munmap (p_sys->pf_munmap)
 625 #else
 626 #   define v4l2_open vlc_open
 627 #   define v4l2_close close
 628 #   define v4l2_dup dup
 629 #   define v4l2_ioctl ioctl
 630 #   define v4l2_read read
 631 #   define v4l2_mmap mmap
 632 #   define v4l2_munmap munmap
 633 #endif
 634
 635 static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
 636                            bool b_demux )
 637 {
 638     /* TODO: if using default device, loop through all /dev/video* until
 639      * one works */
 640     msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
 641     if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
 642     {
 643         msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
 644         p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
 645     }
 646
 647     if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
 648     return VLC_SUCCESS;
 649 }
 650
 651 /*****************************************************************************
 652  * DemuxOpen: opens v4l2 device, access_demux callback
 653  *****************************************************************************
 654  *
 655  * url: <video device>::::
 656  *
 657  *****************************************************************************/
 658 static int DemuxOpen( vlc_object_t *p_this )
 659 {
 660     demux_t     *p_demux = (demux_t*)p_this;
 661     demux_sys_t *p_sys;
 662
 663     /* Only when selected */
 664     if( strcmp( p_demux->psz_access, "v4l2" ) )
 665         return VLC_EGENERIC;
 666
 667     /* Set up p_demux */
 668     p_demux->pf_control = DemuxControl;
 669     p_demux->pf_demux = Demux;
 670     p_demux->info.i_update = 0;
 671     p_demux->info.i_title = 0;
 672     p_demux->info.i_seekpoint = 0;
 673
 674     p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
 675     if( p_sys == NULL ) return VLC_ENOMEM;
 676
 677     GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
 678
 679     ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
 680
 681 #ifdef HAVE_LIBV4L2
 682     if( !var_InheritInteger( p_this, CFG_PREFIX "use-libv4l2" ) )
 683     {
 684         msg_Dbg( p_this, "Trying direct kernel v4l2" );
 685         use_kernel_v4l2( p_sys );
 686         if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
 687             return VLC_SUCCESS;
 688     }
 689
 690     msg_Dbg( p_this, "Trying libv4l2 wrapper" );
 691     use_libv4l2( p_sys );
 692 #endif
 693     if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
 694         return VLC_SUCCESS;
 695
 696     DemuxClose( p_this );
 697     return VLC_EGENERIC;
 698 }
 699
 700 /*****************************************************************************
 701  * GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
 702  *****************************************************************************/
 703 static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
 704 {
 705     p_sys->i_video_pts = -1;
 706
 707     p_sys->i_selected_standard_id =
 708         i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
 709
 710     p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
 711     p_sys->i_selected_audio_input =
 712         var_CreateGetInteger( p_obj, "v4l2-audio-input" );
 713
 714     p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
 715
 716     p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
 717     p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
 718
 719     var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 720
 721     p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
 722     p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
 723
 724     p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
 725
 726     p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
 727     p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
 728     p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
 729
 730     p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
 731
 732     char *psz_aspect = var_CreateGetString( p_obj, "v4l2-aspect-ratio" );
 733     char *psz_delim = !EMPTY_STR(psz_aspect) ? strchr( psz_aspect, ':' ) : NULL;
 734     if( psz_delim )
 735     {
 736         p_sys->i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR / atoi( psz_delim + 1 );
 737     }
 738     else
 739     {
 740         p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3 ;
 741
 742     }
 743     free( psz_aspect );
 744
 745     p_sys->psz_device = NULL;
 746     p_sys->i_fd = -1;
 747
 748     p_sys->p_es = NULL;
 749 }
 750
 751 /*****************************************************************************
 752  * ParseMRL: parse the options contained in the MRL
 753  *****************************************************************************/
 754 static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
 755 {
 756     char *psz_dup = strdup( psz_path );
 757     char *psz_parser = psz_dup;
 758
 759     while( *psz_parser && *psz_parser != ':' )
 760     {
 761         psz_parser++;
 762     }
 763
 764     if( *psz_parser == ':' )
 765     {
 766         /* read options */
 767         for( ;; )
 768         {
 769             *psz_parser++ = '\0';
 770
 771             if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
 772             {
 773                 psz_parser += strlen( "standard=" );
 774                 size_t i;
 775                 for( i = 0; i < ARRAY_SIZE(psz_standards_list_text); i++ )
 776                 {
 777                     const char *psz_value = psz_standards_list_text[i];
 778                     size_t i_len = strlen( psz_value );
 779                     if( !strncasecmp( psz_parser, psz_value, i_len ) &&
 780                         ( psz_parser[i_len] == ':' || psz_parser[i_len] == 0 ) )
 781                     {
 782                         p_sys->i_selected_standard_id = i_standards_list[i];
 783                         psz_parser += i_len;
 784                         break;
 785                     }
 786                 }
 787
 788                 if( i == ARRAY_SIZE(psz_standards_list_text) )
 789                     p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
 790             }
 791             else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
 792             {
 793                 int  i_len;
 794
 795                 psz_parser += strlen( "chroma=" );
 796                 if( strchr( psz_parser, ':' ) )
 797                 {
 798                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 799                 }
 800                 else
 801                 {
 802                     i_len = strlen( psz_parser );
 803                 }
 804
 805                 free( p_sys->psz_requested_chroma );
 806                 p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
 807
 808                 psz_parser += i_len;
 809             }
 810             else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
 811             {
 812                 p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
 813                                        &psz_parser, 0 );
 814             }
 815             else if( !strncmp( psz_parser, "audio-input=", strlen( "audio-input=" ) ) )
 816             {
 817                 p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-input=" ),
 818                                        &psz_parser, 0 );
 819             }
 820             else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
 821             {
 822                 p_sys->f_fps = us_strtof( psz_parser + strlen( "fps=" ),
 823                                           &psz_parser );
 824             }
 825             else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
 826             {
 827                 psz_parser += strlen( "io=" );
 828                 if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
 829                 {
 830                     p_sys->io = IO_METHOD_READ;
 831                     psz_parser += strlen( "read" );
 832                 }
 833                 else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
 834                 {
 835                     p_sys->io = IO_METHOD_MMAP;
 836                     psz_parser += strlen( "mmap" );
 837                 }
 838                 else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
 839                 {
 840                     p_sys->io = IO_METHOD_USERPTR;
 841                     psz_parser += strlen( "userptr" );
 842                 }
 843                 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
 844                 {
 845                     p_sys->io = IO_METHOD_AUTO;
 846                     psz_parser += strlen( "auto" );
 847                 }
 848                 else
 849                 {
 850                     p_sys->io = strtol( psz_parser, &psz_parser, 0 );
 851                 }
 852             }
 853             else if( !strncmp( psz_parser, "width=",
 854                                strlen( "width=" ) ) )
 855             {
 856                 p_sys->i_width =
 857                     strtol( psz_parser + strlen( "width=" ),
 858                             &psz_parser, 0 );
 859             }
 860             else if( !strncmp( psz_parser, "height=",
 861                                strlen( "height=" ) ) )
 862             {
 863                 p_sys->i_height =
 864                     strtol( psz_parser + strlen( "height=" ),
 865                             &psz_parser, 0 );
 866             }
 867             else if( !strncmp( psz_parser, "aspect-ratio=",
 868                                strlen( "aspect-ratio=" ) ) )
 869             {
 870                 unsigned int num,den;
 871                 num = strtol( psz_parser + strlen( "aspect-ratio=" ),
 872                               &psz_parser, 0 );
 873                 den = strtol( psz_parser + strlen( ":" ),
 874                               &psz_parser, 0 );
 875                 if( num && den )
 876                     p_sys->i_aspect = num * VOUT_ASPECT_FACTOR / den;
 877             }
 878             else if( !strncmp( psz_parser, "controls-reset",
 879                                strlen( "controls-reset" ) ) )
 880             {
 881                 var_SetBool( p_obj, "v4l2-controls-reset", true );
 882                 psz_parser += strlen( "controls-reset" );
 883             }
 884 #if 0
 885             else if( !strncmp( psz_parser, "brightness=",
 886                                strlen( "brightness=" ) ) )
 887             {
 888                 var_SetInteger( p_obj, "brightness",
 889                     strtol( psz_parser + strlen( "brightness=" ),
 890                             &psz_parser, 0 ) );
 891             }
 892             else if( !strncmp( psz_parser, "contrast=",
 893                                strlen( "contrast=" ) ) )
 894             {
 895                 var_SetInteger( p_obj, "contrast",
 896                     strtol( psz_parser + strlen( "contrast=" ),
 897                             &psz_parser, 0 ) );
 898             }
 899             else if( !strncmp( psz_parser, "saturation=",
 900                                strlen( "saturation=" ) ) )
 901             {
 902                 var_SetInteger( p_obj, "saturation",
 903                     strtol( psz_parser + strlen( "saturation=" ),
 904                             &psz_parser, 0 ) );
 905             }
 906             else if( !strncmp( psz_parser, "hue=",
 907                                strlen( "hue=" ) ) )
 908             {
 909                 var_SetInteger( p_obj, "hue",
 910                     strtol( psz_parser + strlen( "hue=" ),
 911                             &psz_parser, 0 ) );
 912             }
 913             else if( !strncmp( psz_parser, "gamma=",
 914                                strlen( "gamma=" ) ) )
 915             {
 916                 var_SetInteger( p_obj, "gamma",
 917                     strtol( psz_parser + strlen( "gamma=" ),
 918                             &psz_parser, 0 ) );
 919             }
 920 #endif
 921             else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
 922             {
 923                 p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
 924                                          &psz_parser, 0 );
 925             }
 926             else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
 927             {
 928                 p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
 929                                          &psz_parser, 0 );
 930             }
 931             else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
 932             {
 933                 p_sys->i_frequency = strtol( psz_parser
 934                                           + strlen( "tuner-frequency=" ),
 935                                           &psz_parser, 0 );
 936             }
 937             else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
 938             {
 939                 p_sys->i_audio_mode = strtol( psz_parser
 940                                           + strlen( "tuner-audio-mode=" ),
 941                                           &psz_parser, 0 );
 942             }
 943             else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
 944             {
 945                 int  i_len;
 946
 947                 psz_parser += strlen( "set-ctrls=" );
 948                 if( strchr( psz_parser, ':' ) )
 949                 {
 950                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 951                 }
 952                 else
 953                 {
 954                     i_len = strlen( psz_parser );
 955                 }
 956
 957                 p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
 958
 959                 psz_parser += i_len;
 960             }
 961             else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
 962              || !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
 963              || !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
 964              || !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
 965              || !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
 966             {
 967                 if( strchr( psz_parser, ':' ) )
 968                 {
 969                     psz_parser = strchr( psz_parser, ':' );
 970                 }
 971                 else
 972                 {
 973                     psz_parser += strlen( psz_parser );
 974                 }
 975
 976                 msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
 977             }
 978             else
 979             {
 980                 char *psz_unk = strchr( psz_parser, ':' );
 981                 if (psz_unk)
 982                     psz_unk = strndup( psz_parser, psz_unk - psz_parser );
 983                 else
 984                     psz_unk = strdup( psz_parser);
 985                 msg_Warn( p_obj, "unknown option %s", psz_unk );
 986                 free (psz_unk);
 987             }
 988
 989             while( *psz_parser && *psz_parser != ':' )
 990             {
 991                 psz_parser++;
 992             }
 993
 994             if( *psz_parser == '\0' )
 995             {
 996                 break;
 997             }
 998         }
 999     }
1000
1001     /* Main device */
1002     if( *psz_dup )
1003         p_sys->psz_device = strdup( psz_dup );
1004     else
1005         p_sys->psz_device = strdup( V4L2_DEFAULT );
1006     free( psz_dup );
1007 }
1008
1009 /*****************************************************************************
1010  * Close: close device, free resources
1011  *****************************************************************************/
1012 static void AccessClose( vlc_object_t *p_this )
1013 {
1014     access_t    *p_access = (access_t *)p_this;
1015     demux_sys_t *p_sys   = (demux_sys_t *) p_access->p_sys;
1016
1017     CommonClose( p_this, p_sys );
1018 }
1019
1020 static void DemuxClose( vlc_object_t *p_this )
1021 {
1022     struct v4l2_buffer buf;
1023     enum v4l2_buf_type buf_type;
1024     unsigned int i;
1025
1026     demux_t     *p_demux = (demux_t *)p_this;
1027     demux_sys_t *p_sys   = p_demux->p_sys;
1028
1029     /* Stop video capture */
1030     if( p_sys->i_fd >= 0 )
1031     {
1032         switch( p_sys->io )
1033         {
1034         case IO_METHOD_READ:
1035             /* Nothing to do */
1036             break;
1037
1038         case IO_METHOD_MMAP:
1039         case IO_METHOD_USERPTR:
1040             /* Some drivers 'hang' internally if this is not done before streamoff */
1041             for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
1042             {
1043                 memset( &buf, 0, sizeof(buf) );
1044                 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1045                 buf.memory = ( p_sys->io == IO_METHOD_USERPTR ) ?
1046                     V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
1047                 v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
1048             }
1049
1050             buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1051             if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
1052                 msg_Err( p_this, "VIDIOC_STREAMOFF failed" );
1053             }
1054
1055             break;
1056
1057         default:
1058             break;
1059         }
1060     }
1061
1062     /* Free Video Buffers */
1063     if( p_sys->p_buffers ) {
1064         switch( p_sys->io )
1065         {
1066         case IO_METHOD_READ:
1067             free( p_sys->p_buffers[0].start );
1068             break;
1069
1070         case IO_METHOD_MMAP:
1071             for( i = 0; i < p_sys->i_nbuffers; ++i )
1072             {
1073                 if( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
1074                 {
1075                     msg_Err( p_this, "munmap failed" );
1076                 }
1077             }
1078             break;
1079
1080         case IO_METHOD_USERPTR:
1081             for( i = 0; i < p_sys->i_nbuffers; ++i )
1082             {
1083                free( p_sys->p_buffers[i].start );
1084             }
1085             break;
1086
1087         default:
1088             break;
1089         }
1090         free( p_sys->p_buffers );
1091     }
1092
1093     CommonClose( p_this, p_sys );
1094 }
1095
1096 static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
1097 {
1098     (void)p_this;
1099     /* Close */
1100     if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
1101     free( p_sys->psz_device );
1102     free( p_sys->p_standards );
1103     free( p_sys->p_inputs );
1104     free( p_sys->p_tuners );
1105     free( p_sys->p_codecs );
1106     free( p_sys->psz_requested_chroma );
1107     free( p_sys->psz_set_ctrls );
1108
1109     free( p_sys );
1110 }
1111
1112 /*****************************************************************************
1113  * AccessOpen: opens v4l2 device, access callback
1114  *****************************************************************************
1115  *
1116  * url: <video device>::::
1117  *
1118  *****************************************************************************/
1119 static int AccessOpen( vlc_object_t * p_this )
1120 {
1121     access_t *p_access = (access_t*) p_this;
1122     demux_sys_t * p_sys;
1123
1124     /* Only when selected */
1125     if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
1126
1127     access_InitFields( p_access );
1128     p_sys = calloc( 1, sizeof( demux_sys_t ));
1129     if( !p_sys ) return VLC_ENOMEM;
1130     p_access->p_sys = (access_sys_t*)p_sys;
1131
1132     GetV4L2Params( p_sys, (vlc_object_t *) p_access );
1133
1134     ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
1135
1136 #ifdef HAVE_LIBV4L2
1137     if( !var_InheritInteger( p_this, CFG_PREFIX "use-libv4l2" ) )
1138     {
1139         msg_Dbg( p_this, "Trying direct kernel v4l2" );
1140         use_kernel_v4l2( p_sys );
1141         if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
1142         {
1143             if( p_sys->io == IO_METHOD_READ )
1144             {
1145                 ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1146             }
1147             else
1148             {
1149                 ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1150             }
1151             return VLC_SUCCESS;
1152         }
1153     }
1154
1155     msg_Dbg( p_this, "Trying libv4l2 wrapper" );
1156     use_libv4l2( p_sys );
1157 #endif
1158     if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
1159     {
1160         if( p_sys->io == IO_METHOD_READ )
1161         {
1162             ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1163         }
1164         else
1165         {
1166             ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1167         }
1168         return VLC_SUCCESS;
1169     }
1170
1171     AccessClose( p_this );
1172     return VLC_EGENERIC;
1173 }
1174
1175 /*****************************************************************************
1176  * DemuxControl:
1177  *****************************************************************************/
1178 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
1179 {
1180     switch( i_query )
1181     {
1182         /* Special for access_demux */
1183         case DEMUX_CAN_PAUSE:
1184         case DEMUX_CAN_SEEK:
1185         case DEMUX_CAN_CONTROL_PACE:
1186             *va_arg( args, bool * ) = false;
1187             return VLC_SUCCESS;
1188
1189         case DEMUX_GET_PTS_DELAY:
1190             *va_arg(args,int64_t *) = (int64_t)p_demux->p_sys->i_cache*1000;
1191             return VLC_SUCCESS;
1192
1193         case DEMUX_GET_TIME:
1194             *va_arg( args, int64_t * ) = mdate();
1195             return VLC_SUCCESS;
1196
1197         /* TODO implement others */
1198         default:
1199             return VLC_EGENERIC;
1200     }
1201
1202     return VLC_EGENERIC;
1203 }
1204
1205 /*****************************************************************************
1206  * AccessControl: access callback
1207  *****************************************************************************/
1208 static int AccessControl( access_t *p_access, int i_query, va_list args )
1209 {
1210     demux_sys_t  *p_sys = (demux_sys_t *) p_access->p_sys;
1211
1212     switch( i_query )
1213     {
1214         /* */
1215         case ACCESS_CAN_SEEK:
1216         case ACCESS_CAN_FASTSEEK:
1217         case ACCESS_CAN_PAUSE:
1218         case ACCESS_CAN_CONTROL_PACE:
1219             *va_arg( args, bool* ) = false;
1220             break;
1221
1222         /* */
1223         case ACCESS_GET_PTS_DELAY:
1224             *va_arg(args,int64_t *) = (int64_t)p_sys->i_cache*1000;
1225             break;
1226
1227         /* */
1228         case ACCESS_SET_PAUSE_STATE:
1229             /* Nothing to do */
1230             break;
1231
1232         case ACCESS_GET_TITLE_INFO:
1233         case ACCESS_SET_TITLE:
1234         case ACCESS_SET_SEEKPOINT:
1235         case ACCESS_SET_PRIVATE_ID_STATE:
1236         case ACCESS_GET_CONTENT_TYPE:
1237         case ACCESS_GET_META:
1238             return VLC_EGENERIC;
1239
1240         default:
1241             msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1242             return VLC_EGENERIC;
1243
1244     }
1245     return VLC_SUCCESS;
1246 }
1247
1248 /*****************************************************************************
1249  * AccessRead: access callback
1250  ******************************************************************************/
1251 static block_t *AccessRead( access_t * p_access )
1252 {
1253     demux_sys_t *p_sys = (demux_sys_t *)p_access->p_sys;
1254
1255     struct pollfd fd;
1256     fd.fd = p_sys->i_fd;
1257     fd.events = POLLIN|POLLPRI;
1258     fd.revents = 0;
1259
1260     /* Wait for data */
1261     if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1262     {
1263         if( fd.revents & (POLLIN|POLLPRI) )
1264         {
1265             return GrabVideo( VLC_OBJECT(p_access), p_sys );
1266         }
1267     }
1268
1269     return NULL;
1270 }
1271
1272 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len )
1273 {
1274     demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1275     struct pollfd ufd;
1276     int i_ret;
1277
1278     ufd.fd = p_sys->i_fd;
1279     ufd.events = POLLIN;
1280
1281     if( p_access->info.b_eof )
1282         return 0;
1283
1284     do
1285     {
1286         if( !vlc_object_alive (p_access) )
1287             return 0;
1288
1289         ufd.revents = 0;
1290     }
1291     while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
1292
1293     if( i_ret < 0 )
1294     {
1295         msg_Err( p_access, "Polling error (%m)." );
1296         return -1;
1297     }
1298
1299     i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
1300     if( i_ret == 0 )
1301     {
1302         p_access->info.b_eof = true;
1303     }
1304     else if( i_ret > 0 )
1305     {
1306         p_access->info.i_pos += i_ret;
1307     }
1308
1309     return i_ret;
1310 }
1311
1312 /*****************************************************************************
1313  * Demux: Processes the audio or video frame
1314  *****************************************************************************/
1315 static int Demux( demux_t *p_demux )
1316 {
1317     demux_sys_t *p_sys = p_demux->p_sys;
1318
1319     struct pollfd fd;
1320     fd.fd = p_sys->i_fd;
1321     fd.events = POLLIN|POLLPRI;
1322     fd.revents = 0;
1323
1324     /* Wait for data */
1325     if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1326     {
1327         if( fd.revents & (POLLIN|POLLPRI) )
1328         {
1329             block_t *p_block = GrabVideo( VLC_OBJECT(p_demux), p_sys );
1330             if( p_block )
1331             {
1332                 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1333                 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1334             }
1335         }
1336     }
1337
1338     return 1;
1339 }
1340
1341 /*****************************************************************************
1342  * GrabVideo: Grab a video frame
1343  *****************************************************************************/
1344 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
1345 {
1346     block_t *p_block = NULL;
1347     struct v4l2_buffer buf;
1348     ssize_t i_ret;
1349
1350     if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1351     {
1352         mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1353
1354         /* Did we wait long enough ? (frame rate reduction) */
1355         if( p_sys->i_video_pts + i_dur > mdate() )
1356             return NULL;
1357     }
1358
1359     /* Grab Video Frame */
1360     switch( p_sys->io )
1361     {
1362     case IO_METHOD_READ:
1363         i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1364         if( i_ret == -1 )
1365         {
1366             switch( errno )
1367             {
1368             case EAGAIN:
1369                 return NULL;
1370             case EIO:
1371                 /* Could ignore EIO, see spec. */
1372                 /* fall through */
1373             default:
1374                 msg_Err( p_demux, "Failed to read frame" );
1375                 return 0;
1376                }
1377         }
1378
1379         p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1380         if( !p_block )
1381             return NULL;
1382
1383         break;
1384
1385     case IO_METHOD_MMAP:
1386         memset( &buf, 0, sizeof(buf) );
1387         buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1388         buf.memory = V4L2_MEMORY_MMAP;
1389
1390         /* Wait for next frame */
1391         if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1392         {
1393             switch( errno )
1394             {
1395             case EAGAIN:
1396                 return NULL;
1397             case EIO:
1398                 /* Could ignore EIO, see spec. */
1399                 /* fall through */
1400             default:
1401                 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1402                 return NULL;
1403                }
1404         }
1405
1406         if( buf.index >= p_sys->i_nbuffers ) {
1407             msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1408             return NULL;
1409         }
1410
1411         p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1412         if( !p_block )
1413             return NULL;
1414
1415         /* Unlock */
1416         if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1417         {
1418             msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1419             block_Release( p_block );
1420             return NULL;
1421         }
1422
1423         break;
1424
1425     case IO_METHOD_USERPTR:
1426         memset( &buf, 0, sizeof(buf) );
1427         buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1428         buf.memory = V4L2_MEMORY_USERPTR;
1429
1430         /* Wait for next frame */
1431         if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1432         {
1433             switch( errno )
1434             {
1435             case EAGAIN:
1436                 return NULL;
1437             case EIO:
1438                 /* Could ignore EIO, see spec. */
1439                 /* fall through */
1440             default:
1441                 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1442                 return NULL;
1443             }
1444         }
1445
1446         /* Find frame? */
1447         unsigned int i;
1448         for( i = 0; i < p_sys->i_nbuffers; i++ )
1449         {
1450             if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1451                 buf.length == p_sys->p_buffers[i].length ) break;
1452         }
1453
1454         if( i >= p_sys->i_nbuffers )
1455         {
1456             msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1457             return NULL;
1458         }
1459
1460         p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1461         if( !p_block )
1462             return NULL;
1463
1464         /* Unlock */
1465         if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1466         {
1467             msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1468             block_Release( p_block );
1469             return NULL;
1470         }
1471
1472         break;
1473
1474     default:
1475         break;
1476     }
1477
1478     /* Timestamp */
1479     p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1480     p_block->i_flags |= p_sys->i_block_flags;
1481
1482     return p_block;
1483 }
1484
1485 /*****************************************************************************
1486  * ProcessVideoFrame: Helper function to take a buffer and copy it into
1487  * a new block
1488  *****************************************************************************/
1489 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
1490 {
1491     block_t *p_block;
1492
1493     if( !p_frame ) return NULL;
1494
1495     /* New block */
1496     if( !( p_block = block_New( p_demux, i_size ) ) )
1497     {
1498         msg_Warn( p_demux, "Cannot get new block" );
1499         return NULL;
1500     }
1501
1502     /* Copy frame */
1503     memcpy( p_block->p_buffer, p_frame, i_size );
1504
1505     return p_block;
1506 }
1507
1508 /*****************************************************************************
1509  * Helper function to initalise video IO using the Read method
1510  *****************************************************************************/
1511 static int InitRead( vlc_object_t *p_demux, demux_sys_t *p_sys, unsigned int i_buffer_size )
1512 {
1513     (void)p_demux;
1514
1515     p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1516     if( !p_sys->p_buffers )
1517         return VLC_EGENERIC;
1518
1519     p_sys->p_buffers[0].length = i_buffer_size;
1520     p_sys->p_buffers[0].start = malloc( i_buffer_size );
1521     if( !p_sys->p_buffers[0].start )
1522         return VLC_ENOMEM;
1523
1524     return VLC_SUCCESS;
1525 }
1526
1527 /*****************************************************************************
1528  * Helper function to initalise video IO using the mmap method
1529  *****************************************************************************/
1530 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
1531 {
1532     struct v4l2_requestbuffers req;
1533
1534     memset( &req, 0, sizeof(req) );
1535     req.count = 4;
1536     req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1537     req.memory = V4L2_MEMORY_MMAP;
1538
1539     if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1540     {
1541         msg_Err( p_demux, "device does not support mmap i/o" );
1542         goto open_failed;
1543     }
1544
1545     if( req.count < 2 )
1546     {
1547         msg_Err( p_demux, "Insufficient buffer memory" );
1548         goto open_failed;
1549     }
1550
1551     p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1552     if( !p_sys->p_buffers )
1553         goto open_failed;
1554
1555     for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1556     {
1557         struct v4l2_buffer buf;
1558
1559         memset( &buf, 0, sizeof(buf) );
1560         buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1561         buf.memory = V4L2_MEMORY_MMAP;
1562         buf.index = p_sys->i_nbuffers;
1563
1564         if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1565         {
1566             msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1567             goto open_failed;
1568         }
1569
1570         p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1571         p_sys->p_buffers[p_sys->i_nbuffers].start =
1572             v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1573
1574         if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1575         {
1576             msg_Err( p_demux, "mmap failed (%m)" );
1577             goto open_failed;
1578         }
1579     }
1580
1581     return VLC_SUCCESS;
1582
1583 open_failed:
1584     return VLC_EGENERIC;
1585
1586 }
1587
1588 /*****************************************************************************
1589  * Helper function to initalise video IO using the userbuf method
1590  *****************************************************************************/
1591 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
1592 {
1593     struct v4l2_requestbuffers req;
1594     unsigned int i_page_size;
1595
1596     i_page_size = sysconf(_SC_PAGESIZE);
1597     i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1598
1599     memset( &req, 0, sizeof(req) );
1600     req.count = 4;
1601     req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1602     req.memory = V4L2_MEMORY_USERPTR;
1603
1604     if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1605     {
1606         msg_Err( p_demux, "device does not support user pointer i/o" );
1607         return VLC_EGENERIC;
1608     }
1609
1610     p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1611     if( !p_sys->p_buffers )
1612         goto open_failed;
1613
1614     for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1615     {
1616         p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1617         if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1618                 /* boundary */ i_page_size, i_buffer_size ) )
1619             goto open_failed;
1620     }
1621
1622     return VLC_SUCCESS;
1623
1624 open_failed:
1625     free( p_sys->p_buffers );
1626     return VLC_EGENERIC;
1627
1628 }
1629
1630 /*****************************************************************************
1631  * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1632  * in the array of supported formats returned by the driver
1633  *****************************************************************************/
1634 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1635 {
1636     demux_sys_t *p_sys = p_demux->p_sys;
1637
1638     for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1639     {
1640         if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1641             return true;
1642     }
1643
1644     return false;
1645 }
1646
1647 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1648                               uint32_t i_pixel_format,
1649                               uint32_t i_width, uint32_t i_height )
1650 {
1651     (void)p_demux;
1652 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1653 #ifdef HAVE_LIBV4L2
1654     demux_sys_t *p_sys = p_demux->p_sys;
1655 #endif
1656     /* This is new in Linux 2.6.19 */
1657     struct v4l2_frmivalenum frmival;
1658     memset( &frmival, 0, sizeof(frmival) );
1659     frmival.pixel_format = i_pixel_format;
1660     frmival.width = i_width;
1661     frmival.height = i_height;
1662     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1663     {
1664         switch( frmival.type )
1665         {
1666             case V4L2_FRMIVAL_TYPE_DISCRETE:
1667             {
1668                 float f_fps_max = -1;
1669                 do
1670                 {
1671                     float f_fps = (float)frmival.discrete.denominator
1672                                 / (float)frmival.discrete.numerator;
1673                     if( f_fps > f_fps_max ) f_fps_max = f_fps;
1674                     frmival.index++;
1675                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1676                                      &frmival ) >= 0 );
1677                 return f_fps_max;
1678             }
1679             case V4L2_FRMSIZE_TYPE_STEPWISE:
1680             case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1681                 return __MAX( (float)frmival.stepwise.max.denominator
1682                             / (float)frmival.stepwise.max.numerator,
1683                               (float)frmival.stepwise.min.denominator
1684                             / (float)frmival.stepwise.min.numerator );
1685         }
1686     }
1687 #endif
1688     return -1.;
1689 }
1690
1691 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1692                                       uint32_t i_pixel_format )
1693 {
1694     float f_fps_max = -1.;
1695 #ifdef VIDIOC_ENUM_FRAMESIZES
1696 #ifdef HAVE_LIBV4L2
1697     demux_sys_t *p_sys = p_demux->p_sys;
1698 #endif
1699     /* This is new in Linux 2.6.19 */
1700     struct v4l2_frmsizeenum frmsize;
1701     memset( &frmsize, 0, sizeof(frmsize) );
1702     frmsize.pixel_format = i_pixel_format;
1703     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1704     {
1705         switch( frmsize.type )
1706         {
1707             case V4L2_FRMSIZE_TYPE_DISCRETE:
1708                 do
1709                 {
1710                     frmsize.index++;
1711                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1712                                                    i_pixel_format,
1713                                                    frmsize.discrete.width,
1714                                                    frmsize.discrete.height );
1715                     if( f_fps > f_fps_max ) f_fps_max = f_fps;
1716                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1717                          &frmsize ) >= 0 );
1718                 break;
1719             case V4L2_FRMSIZE_TYPE_STEPWISE:
1720             {
1721                 uint32_t i_width = frmsize.stepwise.min_width;
1722                 uint32_t i_height = frmsize.stepwise.min_height;
1723                 for( ;
1724                      i_width <= frmsize.stepwise.max_width &&
1725                      i_height <= frmsize.stepwise.max_width;
1726                      i_width += frmsize.stepwise.step_width,
1727                      i_height += frmsize.stepwise.step_height )
1728                 {
1729                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1730                                                    i_pixel_format,
1731                                                    i_width, i_height );
1732                     if( f_fps > f_fps_max ) f_fps_max = f_fps;
1733                 }
1734                 break;
1735             }
1736             case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1737                 /* FIXME */
1738                 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1739                  f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1740                                               i_pixel_format,
1741                                               frmsize.stepwise.max_width,
1742                                               frmsize.stepwise.max_height );
1743                 break;
1744         }
1745     }
1746 #endif
1747     return f_fps_max;
1748 }
1749
1750 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1751                               uint32_t i_pixel_format, float f_fps_min,
1752                               uint32_t *pi_width, uint32_t *pi_height )
1753 {
1754     *pi_width = 0;
1755     *pi_height = 0;
1756 #ifdef VIDIOC_ENUM_FRAMESIZES
1757 #ifdef HAVE_LIBV4L2
1758     demux_sys_t *p_sys = p_demux->p_sys;
1759 #endif
1760     /* This is new in Linux 2.6.19 */
1761     struct v4l2_frmsizeenum frmsize;
1762     memset( &frmsize, 0, sizeof(frmsize) );
1763     frmsize.pixel_format = i_pixel_format;
1764     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1765     {
1766         switch( frmsize.type )
1767         {
1768             case V4L2_FRMSIZE_TYPE_DISCRETE:
1769                 do
1770                 {
1771                     frmsize.index++;
1772                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1773                                                    i_pixel_format,
1774                                                    frmsize.discrete.width,
1775                                                    frmsize.discrete.height );
1776                     if( f_fps >= f_fps_min &&
1777                         frmsize.discrete.width > *pi_width )
1778                     {
1779                         *pi_width = frmsize.discrete.width;
1780                         *pi_height = frmsize.discrete.height;
1781                     }
1782                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1783                          &frmsize ) >= 0 );
1784                 break;
1785             case V4L2_FRMSIZE_TYPE_STEPWISE:
1786             {
1787                 uint32_t i_width = frmsize.stepwise.min_width;
1788                 uint32_t i_height = frmsize.stepwise.min_height;
1789                 for( ;
1790                      i_width <= frmsize.stepwise.max_width &&
1791                      i_height <= frmsize.stepwise.max_width;
1792                      i_width += frmsize.stepwise.step_width,
1793                      i_height += frmsize.stepwise.step_height )
1794                 {
1795                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1796                                                    i_pixel_format,
1797                                                    i_width, i_height );
1798                     if( f_fps >= f_fps_min && i_width > *pi_width )
1799                     {
1800                         *pi_width = i_width;
1801                         *pi_height = i_height;
1802                     }
1803                 }
1804                 break;
1805             }
1806             case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1807                 /* FIXME */
1808                 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1809                 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1810                                                i_pixel_format,
1811                                                frmsize.stepwise.max_width,
1812                                                frmsize.stepwise.max_height );
1813                 if( f_fps >= f_fps_min &&
1814                     frmsize.stepwise.max_width > *pi_width )
1815                 {
1816                     *pi_width = frmsize.stepwise.max_width;
1817                     *pi_height = frmsize.stepwise.max_height;
1818                 }
1819                 break;
1820         }
1821     }
1822 #endif
1823 }
1824
1825 /*****************************************************************************
1826  * OpenVideoDev: open and set up the video device and probe for capabilities
1827  *****************************************************************************/
1828 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1829 {
1830     int i_fd;
1831     struct v4l2_cropcap cropcap;
1832     struct v4l2_crop crop;
1833     struct v4l2_format fmt;
1834     unsigned int i_min;
1835     enum v4l2_buf_type buf_type;
1836     const char *psz_device = p_sys->psz_device;
1837     es_format_t es_fmt;
1838
1839     if( ( i_fd = v4l2_open( psz_device, O_RDWR ) ) < 0 )
1840     {
1841         msg_Err( p_obj, "cannot open device (%m)" );
1842         goto open_failed;
1843     }
1844
1845 #ifdef HAVE_LIBV4L2
1846     /* Note the v4l2_xxx functions are designed so that if they get passed an
1847        unknown fd, the will behave exactly as their regular xxx counterparts,
1848        so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1849        custom cam format to normal formats conversion). Chances are big we will
1850        still fail then though, as normally v4l2_fd_open only fails if the
1851        device is not a v4l2 device. */
1852     if( p_sys->b_libv4l2 )
1853     {
1854         int libv4l2_fd;
1855         libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1856         if( libv4l2_fd != -1 )
1857             i_fd = libv4l2_fd;
1858     }
1859 #endif
1860
1861     /* Tune the tuner */
1862     if( p_sys->i_frequency >= 0 )
1863     {
1864         if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1865         {
1866             msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1867             goto open_failed;
1868         }
1869         struct v4l2_frequency frequency;
1870         memset( &frequency, 0, sizeof( frequency ) );
1871         frequency.tuner = p_sys->i_cur_tuner;
1872         frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1873         frequency.frequency = p_sys->i_frequency / 62.5;
1874         if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1875         {
1876             msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1877             goto open_failed;
1878         }
1879         msg_Dbg( p_obj, "Tuner frequency set" );
1880     }
1881
1882     /* Set the tuner's audio mode */
1883     if( p_sys->i_audio_mode >= 0 )
1884     {
1885         if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1886         {
1887             msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1888             goto open_failed;
1889         }
1890         struct v4l2_tuner tuner;
1891         memset( &tuner, 0, sizeof( tuner ) );
1892         tuner.index = p_sys->i_cur_tuner;
1893         tuner.audmode = p_sys->i_audio_mode;
1894         if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1895         {
1896             msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1897             goto open_failed;
1898         }
1899         msg_Dbg( p_obj, "Tuner audio mode set" );
1900     }
1901
1902     /* Select standard */
1903
1904     if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1905     {
1906         if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1907         {
1908             msg_Err( p_obj, "cannot set standard (%m)" );
1909             goto open_failed;
1910         }
1911         if( v4l2_ioctl( i_fd, VIDIOC_G_STD, &p_sys->i_selected_standard_id ) < 0 )
1912         {
1913             msg_Err( p_obj, "cannot get standard (%m). This should never happen!" );
1914             goto open_failed;
1915         }
1916         msg_Dbg( p_obj, "Set standard to (0x%"PRIx64"):", p_sys->i_selected_standard_id );
1917         int i_standard;
1918         for( i_standard = 0; i_standard<p_sys->i_standard; i_standard++)
1919         {
1920             if( p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id )
1921             {
1922                 msg_Dbg( p_obj, "  %s",
1923                         p_sys->p_standards[i_standard].name );
1924             }
1925         }
1926     }
1927
1928     /* Select input */
1929
1930     if( p_sys->i_selected_input >= p_sys->i_input )
1931     {
1932         msg_Warn( p_obj, "invalid input. Using the default one" );
1933         p_sys->i_selected_input = 0;
1934     }
1935
1936     if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1937     {
1938         msg_Err( p_obj, "cannot set input (%m)" );
1939         goto open_failed;
1940     }
1941
1942     /* Set audio input */
1943
1944     if( p_sys->i_audio > 0 )
1945     {
1946         if( p_sys->i_selected_audio_input < 0
1947          || p_sys->i_selected_audio_input >= p_sys->i_audio )
1948         {
1949             msg_Warn( p_obj, "invalid audio input. Using the default one" );
1950             p_sys->i_selected_audio_input = 0;
1951         }
1952
1953         if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1954         {
1955             msg_Err( p_obj, "cannot set audio input (%m)" );
1956             goto open_failed;
1957         }
1958         msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1959     }
1960
1961
1962     /* TODO: Move the resolution stuff up here */
1963     /* if MPEG encoder card, no need to do anything else after this */
1964     ControlList( p_obj, p_sys, i_fd,
1965                   var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1966     SetAvailControlsByString( p_obj, p_sys, i_fd );
1967
1968     /* Verify device support for the various IO methods */
1969     switch( p_sys->io )
1970     {
1971         case IO_METHOD_READ:
1972             if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1973             {
1974                 msg_Err( p_obj, "device does not support read i/o" );
1975                 goto open_failed;
1976             }
1977             msg_Dbg( p_obj, "using read i/o" );
1978             break;
1979
1980         case IO_METHOD_MMAP:
1981         case IO_METHOD_USERPTR:
1982             if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1983             {
1984                 msg_Err( p_obj, "device does not support streaming i/o" );
1985                 goto open_failed;
1986             }
1987             if( p_sys->io == IO_METHOD_MMAP )
1988                 msg_Dbg( p_obj, "using streaming i/o (mmap)" );
1989             else
1990                 msg_Dbg( p_obj, "using streaming i/o (userptr)" );
1991             break;
1992
1993         default:
1994             msg_Err( p_obj, "io method not supported" );
1995             goto open_failed;
1996     }
1997
1998     /* Reset Cropping */
1999     memset( &cropcap, 0, sizeof(cropcap) );
2000     cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2001     if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
2002     {
2003         crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2004         crop.c = cropcap.defrect; /* reset to default */
2005         if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
2006         {
2007             if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
2008             {
2009                 switch( errno )
2010                 {
2011                     case EINVAL:
2012                         /* Cropping not supported. */
2013                         break;
2014                     default:
2015                         /* Errors ignored. */
2016                         break;
2017                 }
2018             }
2019         }
2020     }
2021
2022     /* Try and find default resolution if not specified */
2023     memset( &fmt, 0, sizeof(fmt) );
2024     fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2025
2026     if( p_sys->i_width <= 0 || p_sys->i_height <= 0 )
2027     {
2028         /* Use current width and height settings */
2029         if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
2030         {
2031             msg_Err( p_obj, "Cannot get default width and height." );
2032             goto open_failed;
2033         }
2034
2035         msg_Dbg( p_obj, "found default width and height of %ux%u",
2036                  fmt.fmt.pix.width, fmt.fmt.pix.height );
2037
2038         if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2039         {
2040             msg_Dbg( p_obj, "will try to find optimal width and height." );
2041         }
2042     }
2043     else
2044     {
2045         /* Use user specified width and height */
2046         msg_Dbg( p_obj, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
2047         fmt.fmt.pix.width = p_sys->i_width;
2048         fmt.fmt.pix.height = p_sys->i_height;
2049     }
2050
2051     fmt.fmt.pix.field = V4L2_FIELD_NONE;
2052
2053     if (b_demux)
2054     {
2055         demux_t *p_demux = (demux_t *) p_obj;
2056
2057         /* Test and set Chroma */
2058         fmt.fmt.pix.pixelformat = 0;
2059         if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
2060         {
2061             /* User specified chroma */
2062             const vlc_fourcc_t i_requested_fourcc =
2063                 vlc_fourcc_GetCodecFromString( VIDEO_ES, p_sys->psz_requested_chroma );
2064
2065             for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2066             {
2067                 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
2068                 {
2069                     fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
2070                     break;
2071                 }
2072             }
2073             /* Try and set user chroma */
2074             bool b_error = !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat );
2075             if( !b_error && fmt.fmt.pix.pixelformat )
2076             {
2077                 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2078                 {
2079                     fmt.fmt.pix.field = V4L2_FIELD_ANY;
2080                     if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2081                     {
2082                         fmt.fmt.pix.field = V4L2_FIELD_NONE;
2083                         b_error = true;
2084                     }
2085                 }
2086             }
2087             if( b_error )
2088             {
2089                 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
2090                 fmt.fmt.pix.pixelformat = 0;
2091             }
2092         }
2093
2094         /* If no user specified chroma, find best */
2095         /* This also decides if MPEG encoder card or not */
2096         if( !fmt.fmt.pix.pixelformat )
2097         {
2098             unsigned int i;
2099             for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
2100             {
2101                 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
2102                 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) )
2103                 {
2104                     if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2105                         break;
2106                     fmt.fmt.pix.field = V4L2_FIELD_ANY;
2107                     if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2108                         break;
2109                     fmt.fmt.pix.field = V4L2_FIELD_NONE;
2110                 }
2111             }
2112             if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
2113             {
2114                 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
2115                 goto open_failed;
2116             }
2117         }
2118
2119         if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2120         {
2121             if( p_sys->f_fps <= 0 )
2122             {
2123                 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
2124                                                         fmt.fmt.pix.pixelformat );
2125                 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
2126             }
2127             uint32_t i_width, i_height;
2128             GetMaxDimensions( p_demux, i_fd,
2129                               fmt.fmt.pix.pixelformat, p_sys->f_fps,
2130                               &i_width, &i_height );
2131             if( i_width || i_height )
2132             {
2133                 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f "
2134                                   "of %ux%u", p_sys->f_fps, i_width, i_height );
2135                 fmt.fmt.pix.width = i_width;
2136                 fmt.fmt.pix.height = i_height;
2137                 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2138                 {
2139                     msg_Err( p_obj, "Cannot set size to optimal dimensions "
2140                                     "%ux%u", i_width, i_height );
2141                     goto open_failed;
2142                 }
2143             }
2144             else
2145             {
2146                 msg_Warn( p_obj, "Could not find optimal width and height, "
2147                                  "falling back to driver default." );
2148             }
2149         }
2150     }
2151
2152     p_sys->i_width = fmt.fmt.pix.width;
2153     p_sys->i_height = fmt.fmt.pix.height;
2154
2155     if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
2156     /* Print extra info */
2157     msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
2158     /* Check interlacing */
2159     switch( fmt.fmt.pix.field )
2160     {
2161         case V4L2_FIELD_NONE:
2162             msg_Dbg( p_obj, "Interlacing setting: progressive" );
2163             break;
2164         case V4L2_FIELD_TOP:
2165             msg_Dbg( p_obj, "Interlacing setting: top field only" );
2166             break;
2167         case V4L2_FIELD_BOTTOM:
2168             msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
2169             break;
2170         case V4L2_FIELD_INTERLACED:
2171             msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2172             if( p_sys->i_selected_standard_id == V4L2_STD_NTSC )
2173                 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2174             else
2175                 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2176             break;
2177         case V4L2_FIELD_SEQ_TB:
2178             msg_Dbg( p_obj, "Interlacing setting: sequential top bottom (TODO)" );
2179             break;
2180         case V4L2_FIELD_SEQ_BT:
2181             msg_Dbg( p_obj, "Interlacing setting: sequential bottom top (TODO)" );
2182             break;
2183         case V4L2_FIELD_ALTERNATE:
2184             msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
2185             p_sys->i_height = p_sys->i_height * 2;
2186             break;
2187         case V4L2_FIELD_INTERLACED_TB:
2188             msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
2189             p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2190             break;
2191         case V4L2_FIELD_INTERLACED_BT:
2192             msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
2193             p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2194             break;
2195         default:
2196             msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
2197                       fmt.fmt.pix.field );
2198             break;
2199     }
2200
2201     /* Look up final fourcc */
2202     p_sys->i_fourcc = 0;
2203     for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2204     {
2205         if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2206         {
2207             p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2208             es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2209             es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2210             es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2211             es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2212             break;
2213         }
2214     }
2215
2216     /* Buggy driver paranoia */
2217     i_min = fmt.fmt.pix.width * 2;
2218     if( fmt.fmt.pix.bytesperline < i_min )
2219         fmt.fmt.pix.bytesperline = i_min;
2220     i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2221     if( fmt.fmt.pix.sizeimage < i_min )
2222         fmt.fmt.pix.sizeimage = i_min;
2223
2224 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2225     /* This is new in Linux 2.6.19 */
2226     /* List supported frame rates */
2227     struct v4l2_frmivalenum frmival;
2228     memset( &frmival, 0, sizeof(frmival) );
2229     frmival.pixel_format = fmt.fmt.pix.pixelformat;
2230     frmival.width = p_sys->i_width;
2231     frmival.height = p_sys->i_height;
2232     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2233     {
2234         char psz_fourcc[5];
2235         memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2236         vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2237         msg_Dbg( p_obj, "supported frame intervals for %4.4s, %dx%d:",
2238                  psz_fourcc, frmival.width, frmival.height );
2239         switch( frmival.type )
2240         {
2241             case V4L2_FRMIVAL_TYPE_DISCRETE:
2242                 do
2243                 {
2244                     msg_Dbg( p_obj, "    supported frame interval: %d/%d",
2245                              frmival.discrete.numerator,
2246                              frmival.discrete.denominator );
2247                     frmival.index++;
2248                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2249                 break;
2250             case V4L2_FRMIVAL_TYPE_STEPWISE:
2251                 msg_Dbg( p_obj, "    supported frame intervals: %d/%d to "
2252                          "%d/%d using %d/%d increments",
2253                          frmival.stepwise.min.numerator,
2254                          frmival.stepwise.min.denominator,
2255                          frmival.stepwise.max.numerator,
2256                          frmival.stepwise.max.denominator,
2257                          frmival.stepwise.step.numerator,
2258                          frmival.stepwise.step.denominator );
2259                 break;
2260             case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2261                 msg_Dbg( p_obj, "    supported frame intervals: %d/%d to %d/%d",
2262                          frmival.stepwise.min.numerator,
2263                          frmival.stepwise.min.denominator,
2264                          frmival.stepwise.max.numerator,
2265                          frmival.stepwise.max.denominator );
2266                 break;
2267         }
2268     }
2269 #endif
2270
2271
2272     /* Init IO method */
2273     switch( p_sys->io )
2274     {
2275     case IO_METHOD_READ:
2276         if( b_demux )
2277             if( InitRead( p_obj, p_sys, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2278         break;
2279
2280     case IO_METHOD_MMAP:
2281         if( InitMmap( p_obj, p_sys, i_fd ) != VLC_SUCCESS ) goto open_failed;
2282         break;
2283
2284     case IO_METHOD_USERPTR:
2285         if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2286         break;
2287
2288     default:
2289         goto open_failed;
2290         break;
2291     }
2292
2293     if( b_demux )
2294     {
2295         /* Add */
2296         es_fmt.video.i_width  = p_sys->i_width;
2297         es_fmt.video.i_height = p_sys->i_height;
2298
2299         /* Get aspect-ratio */
2300         es_fmt.video.i_sar_num = p_sys->i_aspect    * es_fmt.video.i_height;
2301         es_fmt.video.i_sar_den = VOUT_ASPECT_FACTOR * es_fmt.video.i_width;
2302
2303         demux_t *p_demux = (demux_t *) p_obj;
2304         msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2305             (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2306         p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2307     }
2308
2309     /* Start Capture */
2310
2311     switch( p_sys->io )
2312     {
2313     case IO_METHOD_READ:
2314         /* Nothing to do */
2315         break;
2316
2317     case IO_METHOD_MMAP:
2318         for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2319         {
2320             struct v4l2_buffer buf;
2321
2322             memset( &buf, 0, sizeof(buf) );
2323             buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2324             buf.memory = V4L2_MEMORY_MMAP;
2325             buf.index = i;
2326
2327             if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2328             {
2329                 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2330                 goto open_failed;
2331             }
2332         }
2333
2334         buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2335         if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2336         {
2337             msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2338             goto open_failed;
2339         }
2340
2341         break;
2342
2343     case IO_METHOD_USERPTR:
2344         for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2345         {
2346             struct v4l2_buffer buf;
2347
2348             memset( &buf, 0, sizeof(buf) );
2349             buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2350             buf.memory = V4L2_MEMORY_USERPTR;
2351             buf.index = i;
2352             buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2353             buf.length = p_sys->p_buffers[i].length;
2354
2355             if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2356             {
2357                 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2358                 goto open_failed;
2359             }
2360         }
2361
2362         buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2363         if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2364         {
2365             msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2366             goto open_failed;
2367         }
2368
2369         break;
2370
2371     default:
2372         goto open_failed;
2373         break;
2374     }
2375
2376     /* report fps */
2377     if( p_sys->f_fps >= 0.1 )
2378     {
2379         msg_Dbg( p_obj, "User set fps=%f", p_sys->f_fps );
2380     }
2381
2382     return i_fd;
2383
2384 open_failed:
2385     if( i_fd >= 0 ) v4l2_close( i_fd );
2386     return -1;
2387
2388 }
2389
2390 /*****************************************************************************
2391  * ProbeVideoDev: probe video for capabilities
2392  *****************************************************************************/
2393 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2394                                  const char *psz_device )
2395 {
2396     int i_index;
2397     int i_standard;
2398
2399     int i_fd;
2400
2401     if( ( i_fd = v4l2_open( psz_device, O_RDWR ) ) < 0 )
2402     {
2403         msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2404         goto open_failed;
2405     }
2406
2407 #ifdef HAVE_LIBV4L2
2408     /* Note the v4l2_xxx functions are designed so that if they get passed an
2409        unknown fd, the will behave exactly as their regular xxx counterparts,
2410        so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2411        custom cam format to normal formats conversion). Chances are big we will
2412        still fail then though, as normally v4l2_fd_open only fails if the
2413        device is not a v4l2 device. */
2414     if( p_sys->b_libv4l2 )
2415     {
2416         int libv4l2_fd;
2417         libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2418         if( libv4l2_fd != -1 )
2419             i_fd = libv4l2_fd;
2420     }
2421 #endif
2422
2423     /* Get device capabilites */
2424
2425     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2426     {
2427         msg_Err( p_obj, "cannot get video capabilities (%m)" );
2428         goto open_failed;
2429     }
2430
2431     msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2432                             p_sys->dev_cap.card,
2433                             p_sys->dev_cap.driver,
2434                             (p_sys->dev_cap.version >> 16) & 0xFF,
2435                             (p_sys->dev_cap.version >> 8) & 0xFF,
2436                             p_sys->dev_cap.version & 0xFF,
2437                             p_sys->dev_cap.bus_info );
2438
2439     msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capture, "
2440                                                        "(%c) Audio, "
2441                                                        "(%c) Tuner, "
2442                                                        "(%c) Radio",
2443              ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE  ? 'X':' '),
2444              ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO  ? 'X':' '),
2445              ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER  ? 'X':' '),
2446              ( p_sys->dev_cap.capabilities & V4L2_CAP_RADIO  ? 'X':' ') );
2447
2448     msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2449                                                  "(%c) Streaming, "
2450                                                  "(%c) Asynchronous",
2451             ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2452             ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2453             ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2454
2455     if( p_sys->io == IO_METHOD_AUTO )
2456     {
2457         if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
2458             p_sys->io = IO_METHOD_MMAP;
2459         else if( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE )
2460             p_sys->io = IO_METHOD_READ;
2461         else
2462             msg_Err( p_obj, "No known I/O method supported" );
2463     }
2464
2465     if( p_sys->dev_cap.capabilities & V4L2_CAP_RDS_CAPTURE )
2466         msg_Dbg( p_obj, "device supports RDS" );
2467
2468 #ifdef V4L2_CAP_HW_FREQ_SEEK
2469     if( p_sys->dev_cap.capabilities & V4L2_CAP_HW_FREQ_SEEK )
2470         msg_Dbg( p_obj, "device supports hardware frequency seeking" );
2471 #endif
2472     if( p_sys->dev_cap.capabilities & V4L2_CAP_VBI_CAPTURE )
2473         msg_Dbg( p_obj, "device supports raw VBI capture" );
2474
2475     if( p_sys->dev_cap.capabilities & V4L2_CAP_SLICED_VBI_CAPTURE )
2476         msg_Dbg( p_obj, "device supports sliced VBI capture" );
2477
2478     /* Now, enumerate all the video inputs. This is useless at the moment
2479        since we have no way to present that info to the user except with
2480        debug messages */
2481
2482     if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2483     {
2484         struct v4l2_input t_input;
2485         memset( &t_input, 0, sizeof(t_input) );
2486         p_sys->i_input = 0;
2487         while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2488         {
2489             p_sys->i_input++;
2490             t_input.index = p_sys->i_input;
2491         }
2492
2493         free( p_sys->p_inputs );
2494         p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2495         if( !p_sys->p_inputs ) goto open_failed;
2496
2497         for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2498         {
2499             p_sys->p_inputs[i_index].index = i_index;
2500
2501             if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2502             {
2503                 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2504                 goto open_failed;
2505             }
2506             msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2507                                 i_index,
2508                                 p_sys->p_inputs[i_index].name,
2509                                 p_sys->p_inputs[i_index].type
2510                                         == V4L2_INPUT_TYPE_TUNER ?
2511                                         "Tuner adapter" :
2512                                         "External analog input",
2513                                 i_index == p_sys->i_selected_input ? '*' : ' ' );
2514         }
2515     }
2516
2517     /* Probe video standards */
2518     if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2519     {
2520         struct v4l2_standard t_standards;
2521         t_standards.index = 0;
2522         p_sys->i_standard = 0;
2523         while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2524         {
2525             p_sys->i_standard++;
2526             t_standards.index = p_sys->i_standard;
2527         }
2528
2529         free( p_sys->p_standards );
2530         p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2531         if( !p_sys->p_standards ) goto open_failed;
2532
2533         for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2534         {
2535             p_sys->p_standards[i_standard].index = i_standard;
2536
2537             if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2538             {
2539                 msg_Err( p_obj, "cannot get video input standards (%m)" );
2540                 goto open_failed;
2541             }
2542             msg_Dbg( p_obj, "video standard %i is: %s %c",
2543                                 i_standard,
2544                                 p_sys->p_standards[i_standard].name,
2545                                 (p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id) ? '*' : ' ' );
2546         }
2547     }
2548
2549     /* initialize the structures for the ioctls */
2550     for( i_index = 0; i_index < 32; i_index++ )
2551     {
2552         p_sys->p_audios[i_index].index = i_index;
2553     }
2554
2555     /* Probe audio inputs */
2556     if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2557     {
2558         while( p_sys->i_audio < 32 &&
2559                v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2560         {
2561             if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2562             {
2563                 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2564                 goto open_failed;
2565             }
2566
2567             msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2568                                 p_sys->i_audio,
2569                                 p_sys->p_audios[p_sys->i_audio].name,
2570                                 p_sys->p_audios[p_sys->i_audio].capability &
2571                                                     V4L2_AUDCAP_STEREO ?
2572                                         "Stereo" : "Mono",
2573                                 p_sys->p_audios[p_sys->i_audio].capability &
2574                                                     V4L2_AUDCAP_AVL ?
2575                                     "(Automatic Volume Level supported)" : "",
2576                                 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2577
2578             p_sys->i_audio++;
2579         }
2580     }
2581
2582     /* List tuner caps */
2583     if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2584     {
2585         struct v4l2_tuner tuner;
2586         memset( &tuner, 0, sizeof(tuner) );
2587         p_sys->i_tuner = 0;
2588         while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2589         {
2590             p_sys->i_tuner++;
2591             memset( &tuner, 0, sizeof(tuner) );
2592             tuner.index = p_sys->i_tuner;
2593         }
2594
2595         free( p_sys->p_tuners );
2596         p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2597         if( !p_sys->p_tuners ) goto open_failed;
2598
2599         for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2600         {
2601             p_sys->p_tuners[i_index].index = i_index;
2602
2603             if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2604             {
2605                 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2606                 goto open_failed;
2607             }
2608             msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2609                               "frequency range: %.1f %s -> %.1f %s",
2610                                 i_index,
2611                                 p_sys->p_tuners[i_index].name,
2612                                 p_sys->p_tuners[i_index].type
2613                                         == V4L2_TUNER_RADIO ?
2614                                         "Radio" : "Analog TV",
2615                                 p_sys->p_tuners[i_index].rangelow * 62.5,
2616                                 p_sys->p_tuners[i_index].capability &
2617                                         V4L2_TUNER_CAP_LOW ?
2618                                         "Hz" : "kHz",
2619                                 p_sys->p_tuners[i_index].rangehigh * 62.5,
2620                                 p_sys->p_tuners[i_index].capability &
2621                                         V4L2_TUNER_CAP_LOW ?
2622                                         "Hz" : "kHz" );
2623
2624             struct v4l2_frequency frequency;
2625             memset( &frequency, 0, sizeof( frequency ) );
2626             if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2627             {
2628                 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2629                 goto open_failed;
2630             }
2631             msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2632                      i_index,
2633                      p_sys->p_tuners[i_index].name,
2634                      frequency.frequency * 62.5,
2635                      p_sys->p_tuners[i_index].capability &
2636                              V4L2_TUNER_CAP_LOW ?
2637                              "Hz" : "kHz" );
2638         }
2639     }
2640
2641     /* Probe for available chromas */
2642     if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2643     {
2644         struct v4l2_fmtdesc codec;
2645
2646         i_index = 0;
2647         memset( &codec, 0, sizeof(codec) );
2648         codec.index = i_index;
2649         codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2650
2651         while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2652         {
2653             i_index++;
2654             codec.index = i_index;
2655         }
2656
2657         p_sys->i_codec = i_index;
2658
2659         free( p_sys->p_codecs );
2660         p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2661
2662         for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2663         {
2664             p_sys->p_codecs[i_index].index = i_index;
2665             p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2666
2667             if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2668             {
2669                 msg_Err( p_obj, "cannot get codec description (%m)" );
2670                 goto open_failed;
2671             }
2672
2673             /* only print if vlc supports the format */
2674             char psz_fourcc_v4l2[5];
2675             memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2676             vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2677                                 &psz_fourcc_v4l2 );
2678             bool b_codec_supported = false;
2679             for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2680             {
2681                 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2682                 {
2683                     b_codec_supported = true;
2684
2685                     char psz_fourcc[5];
2686                     memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2687                     vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2688                                         &psz_fourcc );
2689                     msg_Dbg( p_obj, "device supports chroma %4.4s [%s, %s]",
2690                                 psz_fourcc,
2691                                 p_sys->p_codecs[i_index].description,
2692                                 psz_fourcc_v4l2 );
2693
2694 #ifdef VIDIOC_ENUM_FRAMESIZES
2695                     /* This is new in Linux 2.6.19 */
2696                     /* List valid frame sizes for this format */
2697                     struct v4l2_frmsizeenum frmsize;
2698                     memset( &frmsize, 0, sizeof(frmsize) );
2699                     frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2700                     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2701                     {
2702                         /* Not all devices support this ioctl */
2703                         msg_Warn( p_obj, "Unable to query for frame sizes" );
2704                     }
2705                     else
2706                     {
2707                         switch( frmsize.type )
2708                         {
2709                             case V4L2_FRMSIZE_TYPE_DISCRETE:
2710                                 do
2711                                 {
2712                                     msg_Dbg( p_obj,
2713                 "    device supports size %dx%d",
2714                 frmsize.discrete.width, frmsize.discrete.height );
2715                                     frmsize.index++;
2716                                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2717                                 break;
2718                             case V4L2_FRMSIZE_TYPE_STEPWISE:
2719                                 msg_Dbg( p_obj,
2720                 "    device supports sizes %dx%d to %dx%d using %dx%d increments",
2721                 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2722                 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2723                 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2724                                 break;
2725                             case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2726                                 msg_Dbg( p_obj,
2727                 "    device supports all sizes %dx%d to %dx%d",
2728                 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2729                 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2730                                 break;
2731                         }
2732                     }
2733 #endif
2734                 }
2735             }
2736             if( !b_codec_supported )
2737             {
2738                     msg_Dbg( p_obj,
2739                          "device codec %4.4s (%s) not supported",
2740                          psz_fourcc_v4l2,
2741                          p_sys->p_codecs[i_index].description );
2742             }
2743         }
2744     }
2745
2746
2747     if( i_fd >= 0 ) v4l2_close( i_fd );
2748     return true;
2749
2750 open_failed:
2751
2752     if( i_fd >= 0 ) v4l2_close( i_fd );
2753     return false;
2754
2755 }
2756
2757 static void name2var( unsigned char *name )
2758 {
2759     for( ; *name; name++ )
2760         *name = (*name == ' ') ? '_' : tolower( *name );
2761 }
2762
2763 /*****************************************************************************
2764  * Print a user-class v4l2 control's details, create the relevant variable,
2765  * change the value if needed.
2766  *****************************************************************************/
2767 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2768                               struct v4l2_queryctrl queryctrl,
2769                               bool b_reset, bool b_demux )
2770 {
2771     struct v4l2_querymenu querymenu;
2772     unsigned int i_mid;
2773
2774     int i;
2775     int i_val;
2776
2777     char *psz_name;
2778     vlc_value_t val, val2;
2779
2780     if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2781         msg_Dbg( p_obj, "    control is busy" );
2782     if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2783         msg_Dbg( p_obj, "    control is read-only" );
2784
2785     for( i = 0; controls[i].psz_name != NULL; i++ )
2786         if( controls[i].i_cid == queryctrl.id ) break;
2787
2788     if( controls[i].psz_name )
2789     {
2790         psz_name = strdup( controls[i].psz_name );
2791         char psz_cfg_name[40];
2792         sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2793         i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2794         var_Destroy( p_obj, psz_cfg_name );
2795     }
2796     else
2797     {
2798         psz_name = strdup( (const char *)queryctrl.name );
2799         name2var( (unsigned char *)psz_name );
2800         i_val = -1;
2801     }
2802
2803     switch( queryctrl.type )
2804     {
2805         case V4L2_CTRL_TYPE_INTEGER:
2806             msg_Dbg( p_obj, "    integer control" );
2807             msg_Dbg( p_obj,
2808                      "    valid values: %d to %d by steps of %d",
2809                      queryctrl.minimum, queryctrl.maximum,
2810                      queryctrl.step );
2811
2812             var_Create( p_obj, psz_name,
2813                         VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2814                       | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2815             val.i_int = queryctrl.minimum;
2816             var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2817             val.i_int = queryctrl.maximum;
2818             var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2819             val.i_int = queryctrl.step;
2820             var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2821             break;
2822         case V4L2_CTRL_TYPE_BOOLEAN:
2823             msg_Dbg( p_obj, "    boolean control" );
2824             var_Create( p_obj, psz_name,
2825                         VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2826             break;
2827         case V4L2_CTRL_TYPE_MENU:
2828             msg_Dbg( p_obj, "    menu control" );
2829             var_Create( p_obj, psz_name,
2830                         VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2831                       | VLC_VAR_ISCOMMAND );
2832             memset( &querymenu, 0, sizeof( querymenu ) );
2833             for( i_mid = queryctrl.minimum;
2834                  i_mid <= (unsigned)queryctrl.maximum;
2835                  i_mid++ )
2836             {
2837                 querymenu.index = i_mid;
2838                 querymenu.id = queryctrl.id;
2839                 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2840                 {
2841                     msg_Dbg( p_obj, "        %d: %s",
2842                              querymenu.index, querymenu.name );
2843                     val.i_int = querymenu.index;
2844                     val2.psz_string = (char *)querymenu.name;
2845                     var_Change( p_obj, psz_name,
2846                                 VLC_VAR_ADDCHOICE, &val, &val2 );
2847                 }
2848             }
2849             break;
2850         case V4L2_CTRL_TYPE_BUTTON:
2851             msg_Dbg( p_obj, "    button control" );
2852             var_Create( p_obj, psz_name,
2853                         VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2854             break;
2855         case V4L2_CTRL_TYPE_CTRL_CLASS:
2856             msg_Dbg( p_obj, "    control class" );
2857             var_Create( p_obj, psz_name, VLC_VAR_VOID );
2858             break;
2859         default:
2860             msg_Dbg( p_obj, "    unknown control type (FIXME)" );
2861             /* FIXME */
2862             break;
2863     }
2864
2865     switch( queryctrl.type )
2866     {
2867         case V4L2_CTRL_TYPE_INTEGER:
2868         case V4L2_CTRL_TYPE_BOOLEAN:
2869         case V4L2_CTRL_TYPE_MENU:
2870             {
2871                 struct v4l2_control control;
2872                 msg_Dbg( p_obj, "    default value: %d",
2873                          queryctrl.default_value );
2874                 memset( &control, 0, sizeof( control ) );
2875                 control.id = queryctrl.id;
2876                 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2877                 {
2878                     msg_Dbg( p_obj, "    current value: %d", control.value );
2879                 }
2880                 if( i_val == -1 )
2881                 {
2882                     i_val = control.value;
2883                     if( b_reset && queryctrl.default_value != control.value )
2884                     {
2885                         msg_Dbg( p_obj, "    reset value to default" );
2886                         Control( p_obj, p_sys, i_fd, psz_name,
2887                                  queryctrl.id, queryctrl.default_value );
2888                     }
2889                 }
2890                 else
2891                 {
2892                     Control( p_obj, p_sys, i_fd, psz_name,
2893                              queryctrl.id, i_val );
2894                 }
2895             }
2896             break;
2897         default:
2898             break;
2899     }
2900
2901     val.psz_string = (char *)queryctrl.name;
2902     var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2903     val.i_int = queryctrl.id;
2904     val2.psz_string = (char *)psz_name;
2905     var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2906     /* bad things happen changing MPEG mid-stream
2907      * so don't add to Ext Settings GUI */
2908     if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2909         var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2910
2911     switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2912     {
2913         case VLC_VAR_BOOL:
2914             var_SetBool( p_obj, psz_name, i_val );
2915             break;
2916         case VLC_VAR_INTEGER:
2917             var_SetInteger( p_obj, psz_name, i_val );
2918             break;
2919         case VLC_VAR_VOID:
2920             break;
2921         default:
2922             msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2923                       __LINE__ );
2924             break;
2925     }
2926
2927     if( b_demux )
2928         var_AddCallback( p_obj, psz_name,
2929                         DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2930     else
2931         var_AddCallback( p_obj, psz_name,
2932                         AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2933
2934     free( psz_name );
2935 }
2936
2937 /*****************************************************************************
2938  * List all user-class v4l2 controls, set them to the user specified
2939  * value and create the relevant variables to enable runtime changes
2940  *****************************************************************************/
2941 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2942                         bool b_reset, bool b_demux )
2943 {
2944     struct v4l2_queryctrl queryctrl;
2945     int i_cid;
2946
2947     memset( &queryctrl, 0, sizeof( queryctrl ) );
2948
2949     /* A list of available controls (aka the variable name) will be
2950      * stored as choices in the "allcontrols" variable. We'll thus be able
2951      * to use those to create an appropriate interface
2952      * A list of available controls that can be changed mid-stream will
2953      * be stored in the "controls" variable */
2954     var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2955     var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2956
2957     var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2958
2959     /* Add a control to reset all controls to their default values */
2960     vlc_value_t val, val2;
2961     var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2962     val.psz_string = _( "Reset controls to default" );
2963     var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2964     val.i_int = -1;
2965     val2.psz_string = (char *)"controls-reset";
2966     var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2967     if (b_demux)
2968         var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2969     else
2970         var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2971
2972     queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2973     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2974     {
2975         msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2976
2977         /* List extended controls */
2978         queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2979         while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2980         {
2981             if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2982             {
2983                 msg_Dbg( p_obj, "%s", queryctrl.name );
2984                 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2985                 continue;
2986             }
2987             switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2988             {
2989                 case V4L2_CTRL_CLASS_USER:
2990                     msg_Dbg( p_obj, "Available control: %s (%x)",
2991                              queryctrl.name, queryctrl.id );
2992                     break;
2993                 case V4L2_CTRL_CLASS_MPEG:
2994                     name2var( queryctrl.name );
2995                     msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2996                              queryctrl.name, queryctrl.id );
2997                     break;
2998                 default:
2999                     msg_Dbg( p_obj, "Available private control: %s (%x)",
3000                              queryctrl.name, queryctrl.id );
3001                     break;
3002             }
3003             ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
3004             queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3005         }
3006     }
3007     else
3008     {
3009         msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
3010
3011         /* List public controls */
3012         for( i_cid = V4L2_CID_BASE;
3013              i_cid < V4L2_CID_LASTP1;
3014              i_cid ++ )
3015         {
3016             queryctrl.id = i_cid;
3017             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3018             {
3019                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3020                     continue;
3021                 msg_Dbg( p_obj, "Available control: %s (%x)",
3022                          queryctrl.name, queryctrl.id );
3023                 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3024                                   b_reset, b_demux );
3025             }
3026         }
3027
3028         /* List private controls */
3029         for( i_cid = V4L2_CID_PRIVATE_BASE;
3030              ;
3031              i_cid ++ )
3032         {
3033             queryctrl.id = i_cid;
3034             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3035             {
3036                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3037                     continue;
3038                 msg_Dbg( p_obj, "Available private control: %s (%x)",
3039                          queryctrl.name, queryctrl.id );
3040                 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3041                                   b_reset, b_demux );
3042             }
3043             else
3044                 break;
3045         }
3046     }
3047
3048     return VLC_SUCCESS;
3049 }
3050
3051 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
3052                                       int i_fd )
3053 {
3054     char *psz_parser = p_sys->psz_set_ctrls;
3055     vlc_value_t val, text, name;
3056
3057     if( psz_parser == NULL )
3058         return;
3059
3060     if( *psz_parser == '{' )
3061         psz_parser++;
3062
3063     int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
3064                             &val, &text );
3065     if( i_ret < 0 )
3066     {
3067         msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
3068         return;
3069     }
3070
3071     while( *psz_parser && *psz_parser != '}' )
3072     {
3073         char *psz_delim, *psz_assign;
3074
3075         while( *psz_parser == ',' || *psz_parser == ' ' )
3076             psz_parser++;
3077
3078         psz_delim = strchr( psz_parser, ',' );
3079         if( psz_delim == NULL )
3080             psz_delim = strchr( psz_parser, '}' );
3081         if( psz_delim == NULL )
3082             psz_delim = psz_parser + strlen( psz_parser );
3083
3084         psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
3085         if( psz_assign == NULL )
3086         {
3087             char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
3088             msg_Err( p_obj, "%s missing '='", psz_name );
3089             free( psz_name );
3090             psz_parser = psz_delim + 1;
3091             continue;
3092         }
3093
3094         for( int i = 0;
3095              i < val.p_list->i_count ;//&& psz_parser < psz_assign;
3096              i++ )
3097         {
3098             const char *psz_var = text.p_list->p_values[i].psz_string;
3099             int i_cid = val.p_list->p_values[i].i_int;
3100             var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
3101             const char *psz_name = name.psz_string;
3102
3103             int i_availstrlen = strlen( psz_name );
3104             int i_parsestrlen = psz_assign - psz_parser;
3105             int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
3106
3107             if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
3108             {
3109                 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
3110                          strtol( ++psz_assign, &psz_parser, 0) );
3111             }
3112             free( name.psz_string );
3113         }
3114
3115         if( psz_parser < psz_assign )
3116         {
3117             char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
3118             msg_Err( p_obj, "Control %s not available", psz_name );
3119             free( psz_name );
3120             psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
3121         }
3122     }
3123     var_FreeList( &val, &text );
3124 }
3125
3126 /*****************************************************************************
3127  * Reset all user-class v4l2 controls to their default value
3128  *****************************************************************************/
3129 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
3130 {
3131     struct v4l2_queryctrl queryctrl;
3132     int i_cid;
3133     memset( &queryctrl, 0, sizeof( queryctrl ) );
3134
3135     queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3136     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3137     {
3138         /* Extended control API supported */
3139         queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3140         while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3141         {
3142             if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
3143              || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
3144             {
3145                 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3146                 continue;
3147             }
3148             struct v4l2_control control;
3149             memset( &control, 0, sizeof( control ) );
3150             control.id = queryctrl.id;
3151             if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3152              && queryctrl.default_value != control.value )
3153             {
3154                 int i;
3155                 for( i = 0; controls[i].psz_name != NULL; i++ )
3156                     if( controls[i].i_cid == queryctrl.id ) break;
3157                 name2var( queryctrl.name );
3158                 Control( p_obj, p_sys, i_fd,
3159                          controls[i].psz_name ? controls[i].psz_name
3160                           : (const char *)queryctrl.name,
3161                          queryctrl.id, queryctrl.default_value );
3162             }
3163             queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3164         }
3165     }
3166     else
3167     {
3168
3169         /* public controls */
3170         for( i_cid = V4L2_CID_BASE;
3171              i_cid < V4L2_CID_LASTP1;
3172              i_cid ++ )
3173         {
3174             queryctrl.id = i_cid;
3175             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3176             {
3177                 struct v4l2_control control;
3178                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3179                     continue;
3180                 memset( &control, 0, sizeof( control ) );
3181                 control.id = queryctrl.id;
3182                 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3183                  && queryctrl.default_value != control.value )
3184                 {
3185                     int i;
3186                     for( i = 0; controls[i].psz_name != NULL; i++ )
3187                         if( controls[i].i_cid == queryctrl.id ) break;
3188                     name2var( queryctrl.name );
3189                     Control( p_obj, p_sys, i_fd,
3190                              controls[i].psz_name ? controls[i].psz_name
3191                               : (const char *)queryctrl.name,
3192                              queryctrl.id, queryctrl.default_value );
3193                 }
3194             }
3195         }
3196
3197         /* private controls */
3198         for( i_cid = V4L2_CID_PRIVATE_BASE;
3199              ;
3200              i_cid ++ )
3201         {
3202             queryctrl.id = i_cid;
3203             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3204             {
3205                 struct v4l2_control control;
3206                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3207                     continue;
3208                 memset( &control, 0, sizeof( control ) );
3209                 control.id = queryctrl.id;
3210                 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3211                  && queryctrl.default_value != control.value )
3212                 {
3213                     name2var( queryctrl.name );
3214                     Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3215                              queryctrl.id, queryctrl.default_value );
3216                 }
3217             }
3218             else
3219                 break;
3220         }
3221     }
3222     return VLC_SUCCESS;
3223 }
3224
3225 /*****************************************************************************
3226  * Issue user-class v4l2 controls
3227  *****************************************************************************/
3228 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3229                     const char *psz_name, int i_cid, int i_value )
3230 {
3231     (void)p_sys;
3232     struct v4l2_queryctrl queryctrl;
3233     struct v4l2_control control;
3234     struct v4l2_ext_control ext_control;
3235     struct v4l2_ext_controls ext_controls;
3236
3237     if( i_value == -1 )
3238         return VLC_SUCCESS;
3239
3240     memset( &queryctrl, 0, sizeof( queryctrl ) );
3241
3242     queryctrl.id = i_cid;
3243
3244     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3245         || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3246     {
3247         msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3248         return VLC_EGENERIC;
3249     }
3250
3251     memset( &control, 0, sizeof( control ) );
3252     memset( &ext_control, 0, sizeof( ext_control ) );
3253     memset( &ext_controls, 0, sizeof( ext_controls ) );
3254     control.id = i_cid;
3255     ext_control.id = i_cid;
3256     ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3257     ext_controls.count = 1;
3258     ext_controls.controls = &ext_control;
3259
3260     int i_ret = -1;
3261
3262     if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3263     {
3264         ext_control.value = i_value;
3265         if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3266         {
3267             control.value = i_value;
3268             if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3269             {
3270                 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3271                          psz_name, i_cid, i_value );
3272                 return VLC_EGENERIC;
3273             }
3274             i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3275         }
3276         else
3277         {
3278             i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3279             control.value = ext_control.value;
3280         }
3281     }
3282
3283     if( i_ret >= 0 )
3284     {
3285         vlc_value_t val;
3286         msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3287         switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3288         {
3289             case VLC_VAR_BOOL:
3290                 val.b_bool = control.value;
3291                 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3292                 var_TriggerCallback( p_obj, "controls-update" );
3293                 break;
3294             case VLC_VAR_INTEGER:
3295                 val.i_int = control.value;
3296                 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3297                 var_TriggerCallback( p_obj, "controls-update" );
3298                 break;
3299         }
3300     }
3301     return VLC_SUCCESS;
3302 }
3303
3304 /*****************************************************************************
3305  * On the fly change settings callback
3306  *****************************************************************************/
3307 static int DemuxControlCallback( vlc_object_t *p_this,
3308     const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3309     void *p_data )
3310 {
3311     (void)oldval;
3312     demux_t *p_demux = (demux_t*)p_this;
3313     demux_sys_t *p_sys = p_demux->p_sys;
3314     int i_cid = (long int)p_data;
3315
3316     int i_fd = p_sys->i_fd;
3317
3318     if( i_fd < 0 )
3319         return VLC_EGENERIC;
3320
3321     Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3322
3323     return VLC_EGENERIC;
3324 }
3325
3326 static int DemuxControlResetCallback( vlc_object_t *p_this,
3327     const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3328 {
3329     (void)psz_var;    (void)oldval;    (void)newval;    (void)p_data;
3330     demux_t *p_demux = (demux_t*)p_this;
3331     demux_sys_t *p_sys = p_demux->p_sys;
3332
3333     int i_fd = p_sys->i_fd;
3334
3335     if( i_fd < 0 )
3336         return VLC_EGENERIC;
3337
3338     ControlReset( p_this, p_sys, i_fd );
3339
3340     return VLC_EGENERIC;
3341 }
3342
3343 static int AccessControlCallback( vlc_object_t *p_this,
3344     const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3345     void *p_data )
3346 {
3347     (void)oldval;
3348     access_t *p_access = (access_t *)p_this;
3349     demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3350     int i_cid = (long int)p_data;
3351
3352     int i_fd = p_sys->i_fd;
3353
3354     if( i_fd < 0 )
3355         return VLC_EGENERIC;
3356
3357     Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3358
3359     return VLC_EGENERIC;
3360 }
3361
3362 static int AccessControlResetCallback( vlc_object_t *p_this,
3363     const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3364 {
3365     (void)psz_var;     (void)oldval;     (void)newval;     (void)p_data;
3366     access_t *p_access = (access_t *)p_this;
3367     demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3368
3369     int i_fd = p_sys->i_fd;
3370
3371     if( i_fd < 0 )
3372         return VLC_EGENERIC;
3373
3374     ControlReset( p_this, p_sys, i_fd );
3375
3376     return VLC_EGENERIC;
3377 }