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_demux.h>
  45 #include <vlc_input.h>
  46
  47 #include <ctype.h>
  48 #include <errno.h>
  49 #include <fcntl.h>
  50 #include <sys/ioctl.h>
  51 #include <sys/mman.h>
  52
  53 #include <linux/videodev2.h>
  54
  55 #include <poll.h>
  56
  57 #ifdef HAVE_LIBV4L2
  58 #   include <libv4l2.h>
  59 #endif
  60
  61 /*****************************************************************************
  62  * Module descriptior
  63  *****************************************************************************/
  64
  65 static int  DemuxOpen ( vlc_object_t * );
  66 static void DemuxClose( vlc_object_t * );
  67 static int  AccessOpen ( vlc_object_t * );
  68 static void AccessClose( vlc_object_t * );
  69
  70 #define STANDARD_TEXT N_( "Standard" )
  71 #define STANDARD_LONGTEXT N_( \
  72     "Video standard (Default, SECAM, PAL, or NTSC)." )
  73 #define CHROMA_TEXT N_("Video input chroma format")
  74 #define CHROMA_LONGTEXT N_( \
  75     "Force the Video4Linux2 video device to use a specific chroma format " \
  76     "(eg. I420 or I422 for raw images, MJPG for M-JPEG compressed input) " \
  77     "(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
  78     "I41N, I422, I420, I411, I410, MJPG)")
  79 #define INPUT_TEXT N_( "Input" )
  80 #define INPUT_LONGTEXT N_( \
  81     "Input of the card to use (see debug)." )
  82 #define AUDIO_INPUT_TEXT N_( "Audio input" )
  83 #define AUDIO_INPUT_LONGTEXT N_( \
  84     "Audio input of the card to use (see debug)." )
  85 #define IOMETHOD_TEXT N_( "IO Method" )
  86 #define IOMETHOD_LONGTEXT N_( \
  87     "IO Method (READ, MMAP, USERPTR)." )
  88 #define WIDTH_TEXT N_( "Width" )
  89 #define WIDTH_LONGTEXT N_( \
  90     "Force width (-1 for autodetect, 0 for driver default)." )
  91 #define HEIGHT_TEXT N_( "Height" )
  92 #define HEIGHT_LONGTEXT N_( \
  93     "Force height (-1 for autodetect, 0 for driver default)." )
  94 #define FPS_TEXT N_( "Framerate" )
  95 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
  96     "(0 for autodetect)." )
  97
  98 #ifdef HAVE_LIBV4L2
  99 #define LIBV4L2_TEXT N_( "Use libv4l2" )
 100 #define LIBV4L2_LONGTEXT N_( \
 101     "Force usage of the libv4l2 wrapper." )
 102 #endif
 103
 104 #define CTRL_RESET_TEXT N_( "Reset v4l2 controls" )
 105 #define CTRL_RESET_LONGTEXT N_( \
 106     "Reset controls to defaults provided by the v4l2 driver." )
 107 #define BRIGHTNESS_TEXT N_( "Brightness" )
 108 #define BRIGHTNESS_LONGTEXT N_( \
 109     "Brightness of the video input (if supported by the v4l2 driver)." )
 110 #define CONTRAST_TEXT N_( "Contrast" )
 111 #define CONTRAST_LONGTEXT N_( \
 112     "Contrast of the video input (if supported by the v4l2 driver)." )
 113 #define SATURATION_TEXT N_( "Saturation" )
 114 #define SATURATION_LONGTEXT N_( \
 115     "Saturation of the video input (if supported by the v4l2 driver)." )
 116 #define HUE_TEXT N_( "Hue" )
 117 #define HUE_LONGTEXT N_( \
 118     "Hue of the video input (if supported by the v4l2 driver)." )
 119 #define BLACKLEVEL_TEXT N_( "Black level" )
 120 #define BLACKLEVEL_LONGTEXT N_( \
 121     "Black level of the video input (if supported by the v4l2 driver)." )
 122 #define AUTOWHITEBALANCE_TEXT N_( "Auto white balance" )
 123 #define AUTOWHITEBALANCE_LONGTEXT N_( \
 124     "Automatically set the white balance of the video input " \
 125     "(if supported by the v4l2 driver)." )
 126 #define DOWHITEBALANCE_TEXT N_( "Do white balance" )
 127 #define DOWHITEBALANCE_LONGTEXT N_( \
 128     "Trigger a white balancing action, useless if auto white balance is " \
 129     "activated (if supported by the v4l2 driver)." )
 130 #define REDBALANCE_TEXT N_( "Red balance" )
 131 #define REDBALANCE_LONGTEXT N_( \
 132     "Red balance of the video input (if supported by the v4l2 driver)." )
 133 #define BLUEBALANCE_TEXT N_( "Blue balance" )
 134 #define BLUEBALANCE_LONGTEXT N_( \
 135     "Blue balance of the video input (if supported by the v4l2 driver)." )
 136 #define GAMMA_TEXT N_( "Gamma" )
 137 #define GAMMA_LONGTEXT N_( \
 138     "Gamma of the video input (if supported by the v4l2 driver)." )
 139 #define EXPOSURE_TEXT N_( "Exposure" )
 140 #define EXPOSURE_LONGTEXT N_( \
 141     "Exposure of the video input (if supported by the v4L2 driver)." )
 142 #define AUTOGAIN_TEXT N_( "Auto gain" )
 143 #define AUTOGAIN_LONGTEXT N_( \
 144     "Automatically set the video input's gain (if supported by the " \
 145     "v4l2 driver)." )
 146 #define GAIN_TEXT N_( "Gain" )
 147 #define GAIN_LONGTEXT N_( \
 148     "Video input's gain (if supported by the v4l2 driver)." )
 149 #define HFLIP_TEXT N_( "Horizontal flip" )
 150 #define HFLIP_LONGTEXT N_( \
 151     "Flip the video horizontally (if supported by the v4l2 driver)." )
 152 #define VFLIP_TEXT N_( "Vertical flip" )
 153 #define VFLIP_LONGTEXT N_( \
 154     "Flip the video vertically (if supported by the v4l2 driver)." )
 155 #define HCENTER_TEXT N_( "Horizontal centering" )
 156 #define HCENTER_LONGTEXT N_( \
 157     "Set the camera's horizontal centering (if supported by the v4l2 driver)." )
 158 #define VCENTER_TEXT N_( "Vertical centering" )
 159 #define VCENTER_LONGTEXT N_( \
 160     "Set the camera's vertical centering (if supported by the v4l2 driver)." )
 161
 162 #define AUDIO_VOLUME_TEXT N_( "Volume" )
 163 #define AUDIO_VOLUME_LONGTEXT N_( \
 164     "Volume of the audio input (if supported by the v4l2 driver)." )
 165 #define AUDIO_BALANCE_TEXT N_( "Balance" )
 166 #define AUDIO_BALANCE_LONGTEXT N_( \
 167     "Balance of the audio input (if supported by the v4l2 driver)." )
 168 #define AUDIO_MUTE_TEXT N_( "Mute" )
 169 #define AUDIO_MUTE_LONGTEXT N_( \
 170     "Mute audio input (if supported by the v4l2 driver)." )
 171 #define AUDIO_BASS_TEXT N_( "Bass" )
 172 #define AUDIO_BASS_LONGTEXT N_( \
 173     "Bass level of the audio input (if supported by the v4l2 driver)." )
 174 #define AUDIO_TREBLE_TEXT N_( "Treble" )
 175 #define AUDIO_TREBLE_LONGTEXT N_( \
 176     "Treble level of the audio input (if supported by the v4l2 driver)." )
 177 #define AUDIO_LOUDNESS_TEXT N_( "Loudness" )
 178 #define AUDIO_LOUDNESS_LONGTEXT N_( \
 179     "Loudness of the audio input (if supported by the v4l2 driver)." )
 180
 181 #define CACHING_TEXT N_("Caching value in ms")
 182 #define CACHING_LONGTEXT N_( \
 183     "Caching value for V4L2 captures. This " \
 184     "value should be set in milliseconds." )
 185 #define S_CTRLS_TEXT N_("v4l2 driver controls")
 186 #define S_CTRLS_LONGTEXT N_( \
 187     "Set the v4l2 driver controls to the values specified using a comma " \
 188     "separated list optionally encapsulated by curly braces " \
 189     "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
 190     "To list available controls, increase verbosity (-vvv) " \
 191     "or use the v4l2-ctl application." )
 192
 193 #define TUNER_TEXT N_("Tuner id")
 194 #define TUNER_LONGTEXT N_( \
 195     "Tuner id (see debug output)." )
 196 #define FREQUENCY_TEXT N_("Frequency")
 197 #define FREQUENCY_LONGTEXT N_( \
 198     "Tuner frequency in Hz or kHz (see debug output)" )
 199 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
 200 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
 201     "Tuner audio mono/stereo and track selection." )
 202
 203 #define AUDIO_DEPRECATED_ERROR N_( \
 204     "Alsa or OSS audio capture in the v4l2 access is deprecated. " \
 205     "please use 'v4l2:/""/ :input-slave=alsa:/""/' or " \
 206     "'v4l2:/""/ :input-slave=oss:/""/' instead." )
 207
 208 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
 209 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
 210
 211 typedef enum {
 212     IO_METHOD_AUTO,
 213     IO_METHOD_READ,
 214     IO_METHOD_MMAP,
 215     IO_METHOD_USERPTR,
 216 } io_method;
 217
 218 static const int i_standards_list[] =
 219     { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC,
 220       V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
 221       V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
 222       V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
 223       V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP, V4L2_STD_NTSC_443,
 224       V4L2_STD_NTSC_M_KR,
 225       V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G,
 226       V4L2_STD_SECAM_H, V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1,
 227       V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
 228       V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
 229       };
 230 static const char *const psz_standards_list_text[] =
 231     { N_("Default"), "SECAM", "PAL",  "NTSC",
 232       "PAL_B", "PAL_B1", "PAL_G", "PAL_H", "PAL_I", "PAL_D",
 233       "PAL_D1", "PAL_K", "PAL_M", "PAL_N", "PAL_Nc", "PAL_60",
 234       "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR",
 235       "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H", "SECAM_K",
 236       "SECAM_K1", "SECAM_L", "SECAM_LC",
 237       "ATSC_8_VSB", "ATSC_16_VSB"
 238     };
 239
 240 static const int i_iomethod_list[] =
 241     { IO_METHOD_AUTO, IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
 242 static const char *const psz_iomethod_list_text[] =
 243     { N_("AUTO"), N_("READ"), N_("MMAP"),  N_("USERPTR") };
 244
 245 static const int i_tuner_audio_modes_list[] =
 246     { V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
 247       V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
 248       V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
 249 static const char *const psz_tuner_audio_modes_list_text[] =
 250     { N_( "Mono" ),
 251       N_( "Stereo" ),
 252       N_( "Primary language (Analog TV tuners only)" ),
 253       N_( "Secondary language (Analog TV tuners only)" ),
 254       N_( "Second audio program (Analog TV tuners only)" ),
 255       N_( "Primary language left, Secondary language right" ) };
 256
 257 #define V4L2_DEFAULT "/dev/video0"
 258 #define CFG_PREFIX "v4l2-"
 259
 260 #ifdef HAVE_MAEMO
 261 # define DEFAULT_WIDTH  640
 262 # define DEFAULT_HEIGHT 492
 263 #endif
 264
 265 #ifndef DEFAULT_WIDTH
 266 # define DEFAULT_WIDTH  (-1)
 267 # define DEFAULT_HEIGHT (-1)
 268 #endif
 269
 270 vlc_module_begin ()
 271     set_shortname( N_("Video4Linux2") )
 272     set_description( N_("Video4Linux2 input") )
 273     set_category( CAT_INPUT )
 274     set_subcategory( SUBCAT_INPUT_ACCESS )
 275
 276     set_section( N_( "Video input" ), NULL )
 277     add_integer( CFG_PREFIX "standard", 0, NULL, STANDARD_TEXT,
 278                  STANDARD_LONGTEXT, false )
 279         change_integer_list( i_standards_list, psz_standards_list_text, NULL )
 280     add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 281                 true )
 282     add_integer( CFG_PREFIX "input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
 283                 true )
 284     add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
 285                  AUDIO_INPUT_LONGTEXT, true )
 286     add_integer( CFG_PREFIX "io", IO_METHOD_AUTO, NULL, IOMETHOD_TEXT,
 287                  IOMETHOD_LONGTEXT, true )
 288         change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL )
 289     add_integer( CFG_PREFIX "width", DEFAULT_WIDTH, NULL, WIDTH_TEXT,
 290                 WIDTH_LONGTEXT, true )
 291     add_integer( CFG_PREFIX "height", DEFAULT_HEIGHT, NULL, HEIGHT_TEXT,
 292                 HEIGHT_LONGTEXT, true )
 293     add_string( CFG_PREFIX "aspect-ratio", "4:3", NULL, ASPECT_TEXT,
 294               ASPECT_LONGTEXT, true )
 295     add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
 296     add_integer( CFG_PREFIX "caching", 50 /* ms */, NULL,
 297                 CACHING_TEXT, CACHING_LONGTEXT, true )
 298 #ifdef HAVE_LIBV4L2
 299     add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
 300 #endif
 301
 302     set_section( N_( "Tuner" ), NULL )
 303     add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
 304                  true )
 305     add_integer( CFG_PREFIX "tuner-frequency", -1, NULL, FREQUENCY_TEXT,
 306                  FREQUENCY_LONGTEXT, true )
 307     add_integer( CFG_PREFIX "tuner-audio-mode", -1, NULL, TUNER_AUDIO_MODE_TEXT,
 308                  TUNER_AUDIO_MODE_LONGTEXT, true )
 309         change_integer_list( i_tuner_audio_modes_list,
 310                              psz_tuner_audio_modes_list_text, 0 )
 311
 312     set_section( N_( "Controls" ),
 313                  N_( "v4l2 driver controls, if supported by your v4l2 driver." ) )
 314     add_bool( CFG_PREFIX "controls-reset", false, NULL, CTRL_RESET_TEXT,
 315               CTRL_RESET_LONGTEXT, true )
 316     add_integer( CFG_PREFIX "brightness", -1, NULL, BRIGHTNESS_TEXT,
 317                  BRIGHTNESS_LONGTEXT, true )
 318     add_integer( CFG_PREFIX "contrast", -1, NULL, CONTRAST_TEXT,
 319                  CONTRAST_LONGTEXT, true )
 320     add_integer( CFG_PREFIX "saturation", -1, NULL, SATURATION_TEXT,
 321                  SATURATION_LONGTEXT, true )
 322     add_integer( CFG_PREFIX "hue", -1, NULL, HUE_TEXT,
 323                  HUE_LONGTEXT, true )
 324     add_integer( CFG_PREFIX "black-level", -1, NULL, BLACKLEVEL_TEXT,
 325                  BLACKLEVEL_LONGTEXT, true )
 326     add_integer( CFG_PREFIX "auto-white-balance", -1, NULL,
 327                  AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
 328     add_integer( CFG_PREFIX "do-white-balance", -1, NULL, DOWHITEBALANCE_TEXT,
 329                  DOWHITEBALANCE_LONGTEXT, true )
 330     add_integer( CFG_PREFIX "red-balance", -1, NULL, REDBALANCE_TEXT,
 331                  REDBALANCE_LONGTEXT, true )
 332     add_integer( CFG_PREFIX "blue-balance", -1, NULL, BLUEBALANCE_TEXT,
 333                  BLUEBALANCE_LONGTEXT, true )
 334     add_integer( CFG_PREFIX "gamma", -1, NULL, GAMMA_TEXT,
 335                  GAMMA_LONGTEXT, true )
 336     add_integer( CFG_PREFIX "exposure", -1, NULL, EXPOSURE_TEXT,
 337                  EXPOSURE_LONGTEXT, true )
 338     add_integer( CFG_PREFIX "autogain", -1, NULL, AUTOGAIN_TEXT,
 339                  AUTOGAIN_LONGTEXT, true )
 340     add_integer( CFG_PREFIX "gain", -1, NULL, GAIN_TEXT,
 341                  GAIN_LONGTEXT, true )
 342     add_integer( CFG_PREFIX "hflip", -1, NULL, HFLIP_TEXT,
 343                  HFLIP_LONGTEXT, true )
 344     add_integer( CFG_PREFIX "vflip", -1, NULL, VFLIP_TEXT,
 345                  VFLIP_LONGTEXT, true )
 346     add_integer( CFG_PREFIX "hcenter", -1, NULL, HCENTER_TEXT,
 347                  HCENTER_LONGTEXT, true )
 348     add_integer( CFG_PREFIX "vcenter", -1, NULL, VCENTER_TEXT,
 349                  VCENTER_LONGTEXT, true )
 350     add_integer( CFG_PREFIX "audio-volume", -1, NULL, AUDIO_VOLUME_TEXT,
 351                 AUDIO_VOLUME_LONGTEXT, true )
 352     add_integer( CFG_PREFIX "audio-balance", -1, NULL, AUDIO_BALANCE_TEXT,
 353                 AUDIO_BALANCE_LONGTEXT, true )
 354     add_bool( CFG_PREFIX "audio-mute", false, NULL, AUDIO_MUTE_TEXT,
 355               AUDIO_MUTE_LONGTEXT, true )
 356     add_integer( CFG_PREFIX "audio-bass", -1, NULL, AUDIO_BASS_TEXT,
 357                 AUDIO_BASS_LONGTEXT, true )
 358     add_integer( CFG_PREFIX "audio-treble", -1, NULL, AUDIO_TREBLE_TEXT,
 359                 AUDIO_TREBLE_LONGTEXT, true )
 360     add_integer( CFG_PREFIX "audio-loudness", -1, NULL, AUDIO_LOUDNESS_TEXT,
 361                 AUDIO_LOUDNESS_LONGTEXT, true )
 362     add_string( CFG_PREFIX "set-ctrls", NULL, NULL, S_CTRLS_TEXT,
 363               S_CTRLS_LONGTEXT, true )
 364
 365     add_obsolete_string( CFG_PREFIX "dev" )
 366
 367     add_obsolete_string( CFG_PREFIX "adev" )
 368     add_obsolete_integer( CFG_PREFIX "audio-method" )
 369     add_obsolete_bool( CFG_PREFIX "stereo" )
 370     add_obsolete_integer( CFG_PREFIX "samplerate" )
 371
 372     add_shortcut( "v4l2" )
 373     set_capability( "access_demux", 10 )
 374     set_callbacks( DemuxOpen, DemuxClose )
 375
 376     add_submodule ()
 377     add_shortcut( "v4l2" )
 378     add_shortcut( "v4l2c" )
 379     set_description( N_("Video4Linux2 Compressed A/V") )
 380     set_capability( "access", 0 )
 381     /* use these when open as access_demux fails; VLC will use another demux */
 382     set_callbacks( AccessOpen, AccessClose )
 383
 384 vlc_module_end ()
 385
 386 /*****************************************************************************
 387  * Access: local prototypes
 388  *****************************************************************************/
 389
 390 static void CommonClose( vlc_object_t *, demux_sys_t * );
 391 static void ParseMRL( demux_sys_t *, char *, vlc_object_t * );
 392 static void GetV4L2Params( demux_sys_t *, vlc_object_t * );
 393 static void SetAvailControlsByString( vlc_object_t *, demux_sys_t *, int );
 394
 395 static int DemuxControl( demux_t *, int, va_list );
 396 static int AccessControl( access_t *, int, va_list );
 397
 398 static int Demux( demux_t * );
 399 static block_t *AccessRead( access_t * );
 400 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len );
 401
 402 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys );
 403 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
 404
 405 static bool IsPixelFormatSupported( demux_t *p_demux,
 406                                           unsigned int i_pixelformat );
 407
 408 static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
 409 static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
 410                                  const char *psz_device );
 411
 412 static int ControlList( vlc_object_t *, demux_sys_t *, int , bool, bool );
 413 static int Control( vlc_object_t *, demux_sys_t *, int i_fd,
 414                     const char *psz_name, int i_cid, int i_value );
 415
 416 static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
 417                                  vlc_value_t oldval, vlc_value_t newval,
 418                                  void *p_data );
 419 static int DemuxControlResetCallback( vlc_object_t *p_this, const char *psz_var,
 420                                       vlc_value_t oldval, vlc_value_t newval,
 421                                       void *p_data );
 422 static int AccessControlCallback( vlc_object_t *p_this, const char *psz_var,
 423                                   vlc_value_t oldval, vlc_value_t newval,
 424                                   void *p_data );
 425 static int AccessControlResetCallback( vlc_object_t *p_this,
 426                                        const char *psz_var, vlc_value_t oldval,
 427                                        vlc_value_t newval, void *p_data );
 428
 429 static const struct
 430 {
 431     unsigned int i_v4l2;
 432     vlc_fourcc_t i_fourcc;
 433     int i_rmask;
 434     int i_gmask;
 435     int i_bmask;
 436 } v4l2chroma_to_fourcc[] =
 437 {
 438     /* Raw data types */
 439     { V4L2_PIX_FMT_GREY,    VLC_CODEC_GREY, 0, 0, 0 },
 440     { V4L2_PIX_FMT_HI240,   VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
 441     { V4L2_PIX_FMT_RGB555,  VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
 442     { V4L2_PIX_FMT_RGB565,  VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
 443     /* Won't work since we don't know how to handle such gmask values
 444      * correctly
 445     { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
 446     { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
 447     */
 448     { V4L2_PIX_FMT_BGR24,   VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
 449     { V4L2_PIX_FMT_RGB24,   VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
 450     { V4L2_PIX_FMT_BGR32,   VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
 451     { V4L2_PIX_FMT_RGB32,   VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
 452     { V4L2_PIX_FMT_YUYV,    VLC_CODEC_YUYV, 0, 0, 0 },
 453     { V4L2_PIX_FMT_UYVY,    VLC_CODEC_UYVY, 0, 0, 0 },
 454     { V4L2_PIX_FMT_Y41P,    VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
 455     { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
 456     { V4L2_PIX_FMT_YVU420,  VLC_CODEC_YV12, 0, 0, 0 },
 457     { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
 458     { V4L2_PIX_FMT_YUV410,  VLC_CODEC_I410, 0, 0, 0 },
 459
 460     /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
 461      * by VLC */
 462     { V4L2_PIX_FMT_YUV420,  VLC_CODEC_I420, 0, 0, 0 },
 463     /* FIXME { V4L2_PIX_FMT_RGB444,  VLC_CODEC_RGB32 }, */
 464
 465     /* Compressed data types */
 466     { V4L2_PIX_FMT_MJPEG,   VLC_CODEC_MJPG, 0, 0, 0 },
 467     { V4L2_PIX_FMT_JPEG,    VLC_CODEC_JPEG, 0, 0, 0 },
 468 #if 0
 469     { V4L2_PIX_FMT_DV,      VLC_FOURCC('?','?','?','?') },
 470     { V4L2_PIX_FMT_MPEG,    VLC_FOURCC('?','?','?','?') },
 471 #endif
 472     { 0, 0, 0, 0, 0 }
 473 };
 474
 475 /**
 476  * List of V4L2 chromas were confident enough to use as fallbacks if the
 477  * user hasn't provided a --v4l2-chroma value.
 478  *
 479  * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
 480  */
 481 static const uint32_t p_chroma_fallbacks[] =
 482 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
 483   V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
 484   V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
 485
 486 static const struct
 487 {
 488     const char *psz_name;
 489     unsigned int i_cid;
 490 } controls[] =
 491 {
 492     { "brightness", V4L2_CID_BRIGHTNESS },
 493     { "contrast", V4L2_CID_CONTRAST },
 494     { "saturation", V4L2_CID_SATURATION },
 495     { "hue", V4L2_CID_HUE },
 496     { "audio-volume", V4L2_CID_AUDIO_VOLUME },
 497     { "audio-balance", V4L2_CID_AUDIO_BALANCE },
 498     { "audio-bass", V4L2_CID_AUDIO_BASS },
 499     { "audio-treble", V4L2_CID_AUDIO_TREBLE },
 500     { "audio-mute", V4L2_CID_AUDIO_MUTE },
 501     { "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
 502     { "black-level", V4L2_CID_BLACK_LEVEL },
 503     { "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
 504     { "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
 505     { "red-balance", V4L2_CID_RED_BALANCE },
 506     { "blue-balance", V4L2_CID_BLUE_BALANCE },
 507     { "gamma", V4L2_CID_GAMMA },
 508     { "exposure", V4L2_CID_EXPOSURE },
 509     { "autogain", V4L2_CID_AUTOGAIN },
 510     { "gain", V4L2_CID_GAIN },
 511     { "hflip", V4L2_CID_HFLIP },
 512     { "vflip", V4L2_CID_VFLIP },
 513     { "hcenter", V4L2_CID_HCENTER },
 514     { "vcenter", V4L2_CID_VCENTER },
 515     { NULL, 0 }
 516 };
 517
 518 struct buffer_t
 519 {
 520     void *  start;
 521     size_t  length;
 522 };
 523
 524 struct demux_sys_t
 525 {
 526     char *psz_device;  /* Main device from MRL */
 527     int  i_fd;
 528
 529     char *psz_requested_chroma;
 530
 531     /* Video */
 532     io_method io;
 533
 534     int i_cache;
 535
 536     struct v4l2_capability dev_cap;
 537
 538     int i_input;
 539     struct v4l2_input *p_inputs;
 540     int i_selected_input;
 541
 542     int i_standard;
 543     struct v4l2_standard *p_standards;
 544     v4l2_std_id i_selected_standard_id;
 545
 546     int i_audio;
 547     /* V4L2 devices cannot have more than 32 audio inputs */
 548     struct v4l2_audio p_audios[32];
 549     int i_selected_audio_input;
 550
 551     int i_tuner;
 552     struct v4l2_tuner *p_tuners;
 553
 554     int i_codec;
 555     struct v4l2_fmtdesc *p_codecs;
 556
 557     struct buffer_t *p_buffers;
 558     unsigned int i_nbuffers;
 559
 560     int i_width;
 561     int i_height;
 562     unsigned int i_aspect;
 563     float f_fps;            /* <= 0.0 mean to grab at full rate */
 564     mtime_t i_video_pts;    /* only used when f_fps > 0 */
 565     int i_fourcc;
 566     uint32_t i_block_flags;
 567
 568     es_out_id_t *p_es;
 569
 570     /* Tuner */
 571     int i_cur_tuner;
 572     int i_frequency;
 573     int i_audio_mode;
 574
 575     /* Controls */
 576     char *psz_set_ctrls;
 577
 578
 579 #ifdef HAVE_LIBV4L2
 580     /* */
 581     int (*pf_open)(const char *, int, ...);
 582     int (*pf_close)( int );
 583     int (*pf_dup)( int );
 584     int (*pf_ioctl)( int, unsigned long int, ... );
 585     ssize_t (*pf_read)( int, void *, size_t );
 586     void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
 587     int (*pf_munmap)( void *, size_t );
 588     bool b_libv4l2;
 589 #endif
 590 };
 591
 592 #ifdef HAVE_LIBV4L2
 593 static void use_kernel_v4l2( demux_sys_t *p_sys )
 594 {
 595     p_sys->pf_open = utf8_open;
 596     p_sys->pf_close = close;
 597     p_sys->pf_dup = dup;
 598     p_sys->pf_ioctl = ioctl;
 599     p_sys->pf_read = read;
 600     p_sys->pf_mmap = mmap;
 601     p_sys->pf_munmap = munmap;
 602     p_sys->b_libv4l2 = false;
 603 }
 604
 605 static void use_libv4l2( demux_sys_t *p_sys )
 606 {
 607     p_sys->pf_open = v4l2_open;
 608     p_sys->pf_close = v4l2_close;
 609     p_sys->pf_dup = v4l2_dup;
 610     p_sys->pf_ioctl = v4l2_ioctl;
 611     p_sys->pf_read = v4l2_read;
 612     p_sys->pf_mmap = v4l2_mmap;
 613     p_sys->pf_munmap = v4l2_munmap;
 614     p_sys->b_libv4l2 = true;
 615 }
 616
 617 #   define v4l2_open (p_sys->pf_open)
 618 #   define v4l2_close (p_sys->pf_close)
 619 #   define v4l2_dup (p_sys->pf_dup)
 620 #   define v4l2_ioctl (p_sys->pf_ioctl)
 621 #   define v4l2_read (p_sys->pf_read)
 622 #   define v4l2_mmap (p_sys->pf_mmap)
 623 #   define v4l2_munmap (p_sys->pf_munmap)
 624 #else
 625 #   define v4l2_open utf8_open
 626 #   define v4l2_close close
 627 #   define v4l2_dup dup
 628 #   define v4l2_ioctl ioctl
 629 #   define v4l2_read read
 630 #   define v4l2_mmap mmap
 631 #   define v4l2_munmap munmap
 632 #endif
 633
 634 static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
 635                            bool b_demux )
 636 {
 637     /* TODO: if using default device, loop through all /dev/video* until
 638      * one works */
 639     msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
 640     if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
 641     {
 642         msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
 643         p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
 644     }
 645
 646     if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
 647     return VLC_SUCCESS;
 648 }
 649
 650 /*****************************************************************************
 651  * DemuxOpen: opens v4l2 device, access_demux callback
 652  *****************************************************************************
 653  *
 654  * url: <video device>::::
 655  *
 656  *****************************************************************************/
 657 static int DemuxOpen( vlc_object_t *p_this )
 658 {
 659     demux_t     *p_demux = (demux_t*)p_this;
 660     demux_sys_t *p_sys;
 661
 662     /* Only when selected */
 663     if( strcmp( p_demux->psz_access, "v4l2" ) )
 664         return VLC_EGENERIC;
 665
 666     /* Set up p_demux */
 667     p_demux->pf_control = DemuxControl;
 668     p_demux->pf_demux = Demux;
 669     p_demux->info.i_update = 0;
 670     p_demux->info.i_title = 0;
 671     p_demux->info.i_seekpoint = 0;
 672
 673     p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
 674     if( p_sys == NULL ) return VLC_ENOMEM;
 675
 676     GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
 677
 678     ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
 679
 680 #ifdef HAVE_LIBV4L2
 681     if( !var_InheritInteger( p_this, CFG_PREFIX "use-libv4l2" ) )
 682     {
 683         msg_Dbg( p_this, "Trying direct kernel v4l2" );
 684         use_kernel_v4l2( p_sys );
 685         if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
 686             return VLC_SUCCESS;
 687     }
 688
 689     msg_Dbg( p_this, "Trying libv4l2 wrapper" );
 690     use_libv4l2( p_sys );
 691 #endif
 692     if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
 693         return VLC_SUCCESS;
 694
 695     DemuxClose( p_this );
 696     return VLC_EGENERIC;
 697 }
 698
 699 /*****************************************************************************
 700  * GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
 701  *****************************************************************************/
 702 static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
 703 {
 704     p_sys->i_video_pts = -1;
 705
 706     p_sys->i_selected_standard_id =
 707         i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
 708
 709     p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
 710     p_sys->i_selected_audio_input =
 711         var_CreateGetInteger( p_obj, "v4l2-audio-input" );
 712
 713     p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
 714
 715     p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
 716     p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
 717
 718     var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 719
 720     p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
 721     p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
 722
 723     p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
 724
 725     p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
 726     p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
 727     p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
 728
 729     p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
 730
 731     char *psz_aspect = var_CreateGetString( p_obj, "v4l2-aspect-ratio" );
 732     char *psz_delim = !EMPTY_STR(psz_aspect) ? strchr( psz_aspect, ':' ) : NULL;
 733     if( psz_delim )
 734     {
 735         p_sys->i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR / atoi( psz_delim + 1 );
 736     }
 737     else
 738     {
 739         p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3 ;
 740
 741     }
 742     free( psz_aspect );
 743
 744     p_sys->psz_device = NULL;
 745     p_sys->i_fd = -1;
 746
 747     p_sys->p_es = NULL;
 748 }
 749
 750 /*****************************************************************************
 751  * ParseMRL: parse the options contained in the MRL
 752  *****************************************************************************/
 753 static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
 754 {
 755     char *psz_dup = strdup( psz_path );
 756     char *psz_parser = psz_dup;
 757
 758     while( *psz_parser && *psz_parser != ':' )
 759     {
 760         psz_parser++;
 761     }
 762
 763     if( *psz_parser == ':' )
 764     {
 765         /* read options */
 766         for( ;; )
 767         {
 768             *psz_parser++ = '\0';
 769
 770             if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
 771             {
 772                 psz_parser += strlen( "standard=" );
 773                 size_t i;
 774                 for( i = 0; i < ARRAY_SIZE(psz_standards_list_text); i++ )
 775                 {
 776                     const char *psz_value = psz_standards_list_text[i];
 777                     size_t i_len = strlen( psz_value );
 778                     if( !strncasecmp( psz_parser, psz_value, i_len ) &&
 779                         ( psz_parser[i_len] == ':' || psz_parser[i_len] == 0 ) )
 780                     {
 781                         p_sys->i_selected_standard_id = i_standards_list[i];
 782                         psz_parser += i_len;
 783                         break;
 784                     }
 785                 }
 786
 787                 if( i == ARRAY_SIZE(psz_standards_list_text) )
 788                     p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
 789             }
 790             else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
 791             {
 792                 int  i_len;
 793
 794                 psz_parser += strlen( "chroma=" );
 795                 if( strchr( psz_parser, ':' ) )
 796                 {
 797                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 798                 }
 799                 else
 800                 {
 801                     i_len = strlen( psz_parser );
 802                 }
 803
 804                 free( p_sys->psz_requested_chroma );
 805                 p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
 806
 807                 psz_parser += i_len;
 808             }
 809             else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
 810             {
 811                 p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
 812                                        &psz_parser, 0 );
 813             }
 814             else if( !strncmp( psz_parser, "audio-input=", strlen( "audio-input=" ) ) )
 815             {
 816                 p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-input=" ),
 817                                        &psz_parser, 0 );
 818             }
 819             else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
 820             {
 821                 p_sys->f_fps = us_strtof( psz_parser + strlen( "fps=" ),
 822                                           &psz_parser );
 823             }
 824             else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
 825             {
 826                 psz_parser += strlen( "io=" );
 827                 if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
 828                 {
 829                     p_sys->io = IO_METHOD_READ;
 830                     psz_parser += strlen( "read" );
 831                 }
 832                 else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
 833                 {
 834                     p_sys->io = IO_METHOD_MMAP;
 835                     psz_parser += strlen( "mmap" );
 836                 }
 837                 else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
 838                 {
 839                     p_sys->io = IO_METHOD_USERPTR;
 840                     psz_parser += strlen( "userptr" );
 841                 }
 842                 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
 843                 {
 844                     p_sys->io = IO_METHOD_AUTO;
 845                     psz_parser += strlen( "auto" );
 846                 }
 847                 else
 848                 {
 849                     p_sys->io = strtol( psz_parser, &psz_parser, 0 );
 850                 }
 851             }
 852             else if( !strncmp( psz_parser, "width=",
 853                                strlen( "width=" ) ) )
 854             {
 855                 p_sys->i_width =
 856                     strtol( psz_parser + strlen( "width=" ),
 857                             &psz_parser, 0 );
 858             }
 859             else if( !strncmp( psz_parser, "height=",
 860                                strlen( "height=" ) ) )
 861             {
 862                 p_sys->i_height =
 863                     strtol( psz_parser + strlen( "height=" ),
 864                             &psz_parser, 0 );
 865             }
 866             else if( !strncmp( psz_parser, "aspect-ratio=",
 867                                strlen( "aspect-ratio=" ) ) )
 868             {
 869                 unsigned int num,den;
 870                 num = strtol( psz_parser + strlen( "aspect-ratio=" ),
 871                               &psz_parser, 0 );
 872                 den = strtol( psz_parser + strlen( ":" ),
 873                               &psz_parser, 0 );
 874                 if( num && den )
 875                     p_sys->i_aspect = num * VOUT_ASPECT_FACTOR / den;
 876             }
 877             else if( !strncmp( psz_parser, "controls-reset",
 878                                strlen( "controls-reset" ) ) )
 879             {
 880                 var_SetBool( p_obj, "v4l2-controls-reset", true );
 881                 psz_parser += strlen( "controls-reset" );
 882             }
 883 #if 0
 884             else if( !strncmp( psz_parser, "brightness=",
 885                                strlen( "brightness=" ) ) )
 886             {
 887                 var_SetInteger( p_obj, "brightness",
 888                     strtol( psz_parser + strlen( "brightness=" ),
 889                             &psz_parser, 0 ) );
 890             }
 891             else if( !strncmp( psz_parser, "contrast=",
 892                                strlen( "contrast=" ) ) )
 893             {
 894                 var_SetInteger( p_obj, "contrast",
 895                     strtol( psz_parser + strlen( "contrast=" ),
 896                             &psz_parser, 0 ) );
 897             }
 898             else if( !strncmp( psz_parser, "saturation=",
 899                                strlen( "saturation=" ) ) )
 900             {
 901                 var_SetInteger( p_obj, "saturation",
 902                     strtol( psz_parser + strlen( "saturation=" ),
 903                             &psz_parser, 0 ) );
 904             }
 905             else if( !strncmp( psz_parser, "hue=",
 906                                strlen( "hue=" ) ) )
 907             {
 908                 var_SetInteger( p_obj, "hue",
 909                     strtol( psz_parser + strlen( "hue=" ),
 910                             &psz_parser, 0 ) );
 911             }
 912             else if( !strncmp( psz_parser, "gamma=",
 913                                strlen( "gamma=" ) ) )
 914             {
 915                 var_SetInteger( p_obj, "gamma",
 916                     strtol( psz_parser + strlen( "gamma=" ),
 917                             &psz_parser, 0 ) );
 918             }
 919 #endif
 920             else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
 921             {
 922                 p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
 923                                          &psz_parser, 0 );
 924             }
 925             else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
 926             {
 927                 p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
 928                                          &psz_parser, 0 );
 929             }
 930             else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
 931             {
 932                 p_sys->i_frequency = strtol( psz_parser
 933                                           + strlen( "tuner-frequency=" ),
 934                                           &psz_parser, 0 );
 935             }
 936             else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
 937             {
 938                 p_sys->i_audio_mode = strtol( psz_parser
 939                                           + strlen( "tuner-audio-mode=" ),
 940                                           &psz_parser, 0 );
 941             }
 942             else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
 943             {
 944                 int  i_len;
 945
 946                 psz_parser += strlen( "set-ctrls=" );
 947                 if( strchr( psz_parser, ':' ) )
 948                 {
 949                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 950                 }
 951                 else
 952                 {
 953                     i_len = strlen( psz_parser );
 954                 }
 955
 956                 p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
 957
 958                 psz_parser += i_len;
 959             }
 960             else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
 961              || !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
 962              || !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
 963              || !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
 964              || !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
 965             {
 966                 if( strchr( psz_parser, ':' ) )
 967                 {
 968                     psz_parser = strchr( psz_parser, ':' );
 969                 }
 970                 else
 971                 {
 972                     psz_parser += strlen( psz_parser );
 973                 }
 974
 975                 msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
 976             }
 977             else
 978             {
 979                 char *psz_unk = strchr( psz_parser, ':' );
 980                 if (psz_unk)
 981                     psz_unk = strndup( psz_parser, psz_unk - psz_parser );
 982                 else
 983                     psz_unk = strdup( psz_parser);
 984                 msg_Warn( p_obj, "unknown option %s", psz_unk );
 985                 free (psz_unk);
 986             }
 987
 988             while( *psz_parser && *psz_parser != ':' )
 989             {
 990                 psz_parser++;
 991             }
 992
 993             if( *psz_parser == '\0' )
 994             {
 995                 break;
 996             }
 997         }
 998     }
 999
1000     /* Main device */
1001     if( *psz_dup )
1002         p_sys->psz_device = strdup( psz_dup );
1003     else
1004         p_sys->psz_device = strdup( V4L2_DEFAULT );
1005     free( psz_dup );
1006 }
1007
1008 /*****************************************************************************
1009  * Close: close device, free resources
1010  *****************************************************************************/
1011 static void AccessClose( vlc_object_t *p_this )
1012 {
1013     access_t    *p_access = (access_t *)p_this;
1014     demux_sys_t *p_sys   = (demux_sys_t *) p_access->p_sys;
1015
1016     CommonClose( p_this, p_sys );
1017 }
1018
1019 static void DemuxClose( vlc_object_t *p_this )
1020 {
1021     struct v4l2_buffer buf;
1022     enum v4l2_buf_type buf_type;
1023     unsigned int i;
1024
1025     demux_t     *p_demux = (demux_t *)p_this;
1026     demux_sys_t *p_sys   = p_demux->p_sys;
1027
1028     /* Stop video capture */
1029     if( p_sys->i_fd >= 0 )
1030     {
1031         switch( p_sys->io )
1032         {
1033         case IO_METHOD_READ:
1034             /* Nothing to do */
1035             break;
1036
1037         case IO_METHOD_MMAP:
1038         case IO_METHOD_USERPTR:
1039             /* Some drivers 'hang' internally if this is not done before streamoff */
1040             for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
1041             {
1042                 memset( &buf, 0, sizeof(buf) );
1043                 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1044                 buf.memory = ( p_sys->io == IO_METHOD_USERPTR ) ?
1045                     V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
1046                 v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
1047             }
1048
1049             buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1050             if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
1051                 msg_Err( p_this, "VIDIOC_STREAMOFF failed" );
1052             }
1053
1054             break;
1055
1056         default:
1057             break;
1058         }
1059     }
1060
1061     /* Free Video Buffers */
1062     if( p_sys->p_buffers ) {
1063         switch( p_sys->io )
1064         {
1065         case IO_METHOD_READ:
1066             free( p_sys->p_buffers[0].start );
1067             break;
1068
1069         case IO_METHOD_MMAP:
1070             for( i = 0; i < p_sys->i_nbuffers; ++i )
1071             {
1072                 if( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
1073                 {
1074                     msg_Err( p_this, "munmap failed" );
1075                 }
1076             }
1077             break;
1078
1079         case IO_METHOD_USERPTR:
1080             for( i = 0; i < p_sys->i_nbuffers; ++i )
1081             {
1082                free( p_sys->p_buffers[i].start );
1083             }
1084             break;
1085
1086         default:
1087             break;
1088         }
1089         free( p_sys->p_buffers );
1090     }
1091
1092     CommonClose( p_this, p_sys );
1093 }
1094
1095 static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
1096 {
1097     (void)p_this;
1098     /* Close */
1099     if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
1100     free( p_sys->psz_device );
1101     free( p_sys->p_standards );
1102     free( p_sys->p_inputs );
1103     free( p_sys->p_tuners );
1104     free( p_sys->p_codecs );
1105     free( p_sys->psz_requested_chroma );
1106     free( p_sys->psz_set_ctrls );
1107
1108     free( p_sys );
1109 }
1110
1111 /*****************************************************************************
1112  * AccessOpen: opens v4l2 device, access callback
1113  *****************************************************************************
1114  *
1115  * url: <video device>::::
1116  *
1117  *****************************************************************************/
1118 static int AccessOpen( vlc_object_t * p_this )
1119 {
1120     access_t *p_access = (access_t*) p_this;
1121     demux_sys_t * p_sys;
1122
1123     /* Only when selected */
1124     if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
1125
1126     access_InitFields( p_access );
1127     p_sys = calloc( 1, sizeof( demux_sys_t ));
1128     if( !p_sys ) return VLC_ENOMEM;
1129     p_access->p_sys = (access_sys_t*)p_sys;
1130
1131     GetV4L2Params( p_sys, (vlc_object_t *) p_access );
1132
1133     ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
1134
1135 #ifdef HAVE_LIBV4L2
1136     if( !var_InheritInteger( p_this, CFG_PREFIX "use-libv4l2" ) )
1137     {
1138         msg_Dbg( p_this, "Trying direct kernel v4l2" );
1139         use_kernel_v4l2( p_sys );
1140         if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
1141         {
1142             if( p_sys->io == IO_METHOD_READ )
1143             {
1144                 ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1145             }
1146             else
1147             {
1148                 ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1149             }
1150             return VLC_SUCCESS;
1151         }
1152     }
1153
1154     msg_Dbg( p_this, "Trying libv4l2 wrapper" );
1155     use_libv4l2( p_sys );
1156 #endif
1157     if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
1158     {
1159         if( p_sys->io == IO_METHOD_READ )
1160         {
1161             ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1162         }
1163         else
1164         {
1165             ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1166         }
1167         return VLC_SUCCESS;
1168     }
1169
1170     AccessClose( p_this );
1171     return VLC_EGENERIC;
1172 }
1173
1174 /*****************************************************************************
1175  * DemuxControl:
1176  *****************************************************************************/
1177 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
1178 {
1179     switch( i_query )
1180     {
1181         /* Special for access_demux */
1182         case DEMUX_CAN_PAUSE:
1183         case DEMUX_CAN_SEEK:
1184         case DEMUX_CAN_CONTROL_PACE:
1185             *va_arg( args, bool * ) = false;
1186             return VLC_SUCCESS;
1187
1188         case DEMUX_GET_PTS_DELAY:
1189             *va_arg(args,int64_t *) = (int64_t)p_demux->p_sys->i_cache*1000;
1190             return VLC_SUCCESS;
1191
1192         case DEMUX_GET_TIME:
1193             *va_arg( args, int64_t * ) = mdate();
1194             return VLC_SUCCESS;
1195
1196         /* TODO implement others */
1197         default:
1198             return VLC_EGENERIC;
1199     }
1200
1201     return VLC_EGENERIC;
1202 }
1203
1204 /*****************************************************************************
1205  * AccessControl: access callback
1206  *****************************************************************************/
1207 static int AccessControl( access_t *p_access, int i_query, va_list args )
1208 {
1209     demux_sys_t  *p_sys = (demux_sys_t *) p_access->p_sys;
1210
1211     switch( i_query )
1212     {
1213         /* */
1214         case ACCESS_CAN_SEEK:
1215         case ACCESS_CAN_FASTSEEK:
1216         case ACCESS_CAN_PAUSE:
1217         case ACCESS_CAN_CONTROL_PACE:
1218             *va_arg( args, bool* ) = false;
1219             break;
1220
1221         /* */
1222         case ACCESS_GET_PTS_DELAY:
1223             *va_arg(args,int64_t *) = (int64_t)p_sys->i_cache*1000;
1224             break;
1225
1226         /* */
1227         case ACCESS_SET_PAUSE_STATE:
1228             /* Nothing to do */
1229             break;
1230
1231         case ACCESS_GET_TITLE_INFO:
1232         case ACCESS_SET_TITLE:
1233         case ACCESS_SET_SEEKPOINT:
1234         case ACCESS_SET_PRIVATE_ID_STATE:
1235         case ACCESS_GET_CONTENT_TYPE:
1236         case ACCESS_GET_META:
1237             return VLC_EGENERIC;
1238
1239         default:
1240             msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1241             return VLC_EGENERIC;
1242
1243     }
1244     return VLC_SUCCESS;
1245 }
1246
1247 /*****************************************************************************
1248  * AccessRead: access callback
1249  ******************************************************************************/
1250 static block_t *AccessRead( access_t * p_access )
1251 {
1252     demux_sys_t *p_sys = (demux_sys_t *)p_access->p_sys;
1253
1254     struct pollfd fd;
1255     fd.fd = p_sys->i_fd;
1256     fd.events = POLLIN|POLLPRI;
1257     fd.revents = 0;
1258
1259     /* Wait for data */
1260     if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1261     {
1262         if( fd.revents & (POLLIN|POLLPRI) )
1263         {
1264             return GrabVideo( VLC_OBJECT(p_access), p_sys );
1265         }
1266     }
1267
1268     return NULL;
1269 }
1270
1271 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len )
1272 {
1273     demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1274     struct pollfd ufd;
1275     int i_ret;
1276
1277     ufd.fd = p_sys->i_fd;
1278     ufd.events = POLLIN;
1279
1280     if( p_access->info.b_eof )
1281         return 0;
1282
1283     do
1284     {
1285         if( !vlc_object_alive (p_access) )
1286             return 0;
1287
1288         ufd.revents = 0;
1289     }
1290     while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
1291
1292     if( i_ret < 0 )
1293     {
1294         msg_Err( p_access, "Polling error (%m)." );
1295         return -1;
1296     }
1297
1298     i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
1299     if( i_ret == 0 )
1300     {
1301         p_access->info.b_eof = true;
1302     }
1303     else if( i_ret > 0 )
1304     {
1305         p_access->info.i_pos += i_ret;
1306     }
1307
1308     return i_ret;
1309 }
1310
1311 /*****************************************************************************
1312  * Demux: Processes the audio or video frame
1313  *****************************************************************************/
1314 static int Demux( demux_t *p_demux )
1315 {
1316     demux_sys_t *p_sys = p_demux->p_sys;
1317
1318     struct pollfd fd;
1319     fd.fd = p_sys->i_fd;
1320     fd.events = POLLIN|POLLPRI;
1321     fd.revents = 0;
1322
1323     /* Wait for data */
1324     if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1325     {
1326         if( fd.revents & (POLLIN|POLLPRI) )
1327         {
1328             block_t *p_block = GrabVideo( VLC_OBJECT(p_demux), p_sys );
1329             if( p_block )
1330             {
1331                 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1332                 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1333             }
1334         }
1335     }
1336
1337     return 1;
1338 }
1339
1340 /*****************************************************************************
1341  * GrabVideo: Grab a video frame
1342  *****************************************************************************/
1343 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
1344 {
1345     block_t *p_block = NULL;
1346     struct v4l2_buffer buf;
1347     ssize_t i_ret;
1348
1349     if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1350     {
1351         mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1352
1353         /* Did we wait long enough ? (frame rate reduction) */
1354         if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1355     }
1356
1357     /* Grab Video Frame */
1358     switch( p_sys->io )
1359     {
1360     case IO_METHOD_READ:
1361         i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1362         if( i_ret == -1 )
1363         {
1364             switch( errno )
1365             {
1366             case EAGAIN:
1367                 return 0;
1368             case EIO:
1369                 /* Could ignore EIO, see spec. */
1370                 /* fall through */
1371             default:
1372                 msg_Err( p_demux, "Failed to read frame" );
1373                 return 0;
1374                }
1375         }
1376
1377         p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1378         if( !p_block ) return 0;
1379
1380         break;
1381
1382     case IO_METHOD_MMAP:
1383         memset( &buf, 0, sizeof(buf) );
1384         buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1385         buf.memory = V4L2_MEMORY_MMAP;
1386
1387         /* Wait for next frame */
1388         if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1389         {
1390             switch( errno )
1391             {
1392             case EAGAIN:
1393                 return 0;
1394             case EIO:
1395                 /* Could ignore EIO, see spec. */
1396                 /* fall through */
1397             default:
1398                 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1399                 return 0;
1400                }
1401         }
1402
1403         if( buf.index >= p_sys->i_nbuffers ) {
1404             msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1405             return 0;
1406         }
1407
1408         p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1409         if( !p_block ) return 0;
1410
1411         /* Unlock */
1412         if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1413         {
1414             msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1415             block_Release( p_block );
1416             return 0;
1417         }
1418
1419         break;
1420
1421     case IO_METHOD_USERPTR:
1422         memset( &buf, 0, sizeof(buf) );
1423         buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1424         buf.memory = V4L2_MEMORY_USERPTR;
1425
1426         /* Wait for next frame */
1427         if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1428         {
1429             switch( errno )
1430             {
1431             case EAGAIN:
1432                 return 0;
1433             case EIO:
1434                 /* Could ignore EIO, see spec. */
1435                 /* fall through */
1436             default:
1437                 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1438                 return 0;
1439             }
1440         }
1441
1442         /* Find frame? */
1443         unsigned int i;
1444         for( i = 0; i < p_sys->i_nbuffers; i++ )
1445         {
1446             if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1447                 buf.length == p_sys->p_buffers[i].length ) break;
1448         }
1449
1450         if( i >= p_sys->i_nbuffers )
1451         {
1452             msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1453             return 0;
1454         }
1455
1456         p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1457         if( !p_block ) return 0;
1458
1459         /* Unlock */
1460         if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1461         {
1462             msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1463             block_Release( p_block );
1464             return 0;
1465         }
1466
1467         break;
1468
1469     default:
1470         break;
1471     }
1472
1473     /* Timestamp */
1474     p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1475     p_block->i_flags |= p_sys->i_block_flags;
1476
1477     return p_block;
1478 }
1479
1480 /*****************************************************************************
1481  * ProcessVideoFrame: Helper function to take a buffer and copy it into
1482  * a new block
1483  *****************************************************************************/
1484 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
1485 {
1486     block_t *p_block;
1487
1488     if( !p_frame ) return 0;
1489
1490     /* New block */
1491     if( !( p_block = block_New( p_demux, i_size ) ) )
1492     {
1493         msg_Warn( p_demux, "Cannot get new block" );
1494         return 0;
1495     }
1496
1497     /* Copy frame */
1498     memcpy( p_block->p_buffer, p_frame, i_size );
1499
1500     return p_block;
1501 }
1502
1503 /*****************************************************************************
1504  * Helper function to initalise video IO using the Read method
1505  *****************************************************************************/
1506 static int InitRead( vlc_object_t *p_demux, demux_sys_t *p_sys, unsigned int i_buffer_size )
1507 {
1508     (void)p_demux;
1509
1510     p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1511     if( !p_sys->p_buffers )
1512         return VLC_EGENERIC;
1513
1514     p_sys->p_buffers[0].length = i_buffer_size;
1515     p_sys->p_buffers[0].start = malloc( i_buffer_size );
1516     if( !p_sys->p_buffers[0].start )
1517         return VLC_ENOMEM;
1518
1519     return VLC_SUCCESS;
1520 }
1521
1522 /*****************************************************************************
1523  * Helper function to initalise video IO using the mmap method
1524  *****************************************************************************/
1525 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
1526 {
1527     struct v4l2_requestbuffers req;
1528
1529     memset( &req, 0, sizeof(req) );
1530     req.count = 4;
1531     req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1532     req.memory = V4L2_MEMORY_MMAP;
1533
1534     if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1535     {
1536         msg_Err( p_demux, "device does not support mmap i/o" );
1537         goto open_failed;
1538     }
1539
1540     if( req.count < 2 )
1541     {
1542         msg_Err( p_demux, "Insufficient buffer memory" );
1543         goto open_failed;
1544     }
1545
1546     p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1547     if( !p_sys->p_buffers )
1548         goto open_failed;
1549
1550     for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1551     {
1552         struct v4l2_buffer buf;
1553
1554         memset( &buf, 0, sizeof(buf) );
1555         buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1556         buf.memory = V4L2_MEMORY_MMAP;
1557         buf.index = p_sys->i_nbuffers;
1558
1559         if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1560         {
1561             msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1562             goto open_failed;
1563         }
1564
1565         p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1566         p_sys->p_buffers[p_sys->i_nbuffers].start =
1567             v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1568
1569         if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1570         {
1571             msg_Err( p_demux, "mmap failed (%m)" );
1572             goto open_failed;
1573         }
1574     }
1575
1576     return VLC_SUCCESS;
1577
1578 open_failed:
1579     return VLC_EGENERIC;
1580
1581 }
1582
1583 /*****************************************************************************
1584  * Helper function to initalise video IO using the userbuf method
1585  *****************************************************************************/
1586 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
1587 {
1588     struct v4l2_requestbuffers req;
1589     unsigned int i_page_size;
1590
1591     i_page_size = sysconf(_SC_PAGESIZE);
1592     i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1593
1594     memset( &req, 0, sizeof(req) );
1595     req.count = 4;
1596     req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1597     req.memory = V4L2_MEMORY_USERPTR;
1598
1599     if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1600     {
1601         msg_Err( p_demux, "device does not support user pointer i/o" );
1602         return VLC_EGENERIC;
1603     }
1604
1605     p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1606     if( !p_sys->p_buffers )
1607         goto open_failed;
1608
1609     for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1610     {
1611         p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1612         if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1613                 /* boundary */ i_page_size, i_buffer_size ) )
1614             goto open_failed;
1615     }
1616
1617     return VLC_SUCCESS;
1618
1619 open_failed:
1620     free( p_sys->p_buffers );
1621     return VLC_EGENERIC;
1622
1623 }
1624
1625 /*****************************************************************************
1626  * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1627  * in the array of supported formats returned by the driver
1628  *****************************************************************************/
1629 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1630 {
1631     demux_sys_t *p_sys = p_demux->p_sys;
1632
1633     for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1634     {
1635         if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1636             return true;
1637     }
1638
1639     return false;
1640 }
1641
1642 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1643                               uint32_t i_pixel_format,
1644                               uint32_t i_width, uint32_t i_height )
1645 {
1646     (void)p_demux;
1647 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1648 #ifdef HAVE_LIBV4L2
1649     demux_sys_t *p_sys = p_demux->p_sys;
1650 #endif
1651     /* This is new in Linux 2.6.19 */
1652     struct v4l2_frmivalenum frmival;
1653     memset( &frmival, 0, sizeof(frmival) );
1654     frmival.pixel_format = i_pixel_format;
1655     frmival.width = i_width;
1656     frmival.height = i_height;
1657     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1658     {
1659         switch( frmival.type )
1660         {
1661             case V4L2_FRMIVAL_TYPE_DISCRETE:
1662             {
1663                 float f_fps_max = -1;
1664                 do
1665                 {
1666                     float f_fps = (float)frmival.discrete.denominator
1667                                 / (float)frmival.discrete.numerator;
1668                     if( f_fps > f_fps_max ) f_fps_max = f_fps;
1669                     frmival.index++;
1670                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1671                                      &frmival ) >= 0 );
1672                 return f_fps_max;
1673             }
1674             case V4L2_FRMSIZE_TYPE_STEPWISE:
1675             case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1676                 return __MAX( (float)frmival.stepwise.max.denominator
1677                             / (float)frmival.stepwise.max.numerator,
1678                               (float)frmival.stepwise.min.denominator
1679                             / (float)frmival.stepwise.min.numerator );
1680         }
1681     }
1682 #endif
1683     return -1.;
1684 }
1685
1686 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1687                                       uint32_t i_pixel_format )
1688 {
1689     float f_fps_max = -1.;
1690 #ifdef VIDIOC_ENUM_FRAMESIZES
1691 #ifdef HAVE_LIBV4L2
1692     demux_sys_t *p_sys = p_demux->p_sys;
1693 #endif
1694     /* This is new in Linux 2.6.19 */
1695     struct v4l2_frmsizeenum frmsize;
1696     memset( &frmsize, 0, sizeof(frmsize) );
1697     frmsize.pixel_format = i_pixel_format;
1698     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1699     {
1700         switch( frmsize.type )
1701         {
1702             case V4L2_FRMSIZE_TYPE_DISCRETE:
1703                 do
1704                 {
1705                     frmsize.index++;
1706                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1707                                                    i_pixel_format,
1708                                                    frmsize.discrete.width,
1709                                                    frmsize.discrete.height );
1710                     if( f_fps > f_fps_max ) f_fps_max = f_fps;
1711                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1712                          &frmsize ) >= 0 );
1713                 break;
1714             case V4L2_FRMSIZE_TYPE_STEPWISE:
1715             {
1716                 uint32_t i_width = frmsize.stepwise.min_width;
1717                 uint32_t i_height = frmsize.stepwise.min_height;
1718                 for( ;
1719                      i_width <= frmsize.stepwise.max_width &&
1720                      i_height <= frmsize.stepwise.max_width;
1721                      i_width += frmsize.stepwise.step_width,
1722                      i_height += frmsize.stepwise.step_height )
1723                 {
1724                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1725                                                    i_pixel_format,
1726                                                    i_width, i_height );
1727                     if( f_fps > f_fps_max ) f_fps_max = f_fps;
1728                 }
1729                 break;
1730             }
1731             case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1732                 /* FIXME */
1733                 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1734                  f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1735                                               i_pixel_format,
1736                                               frmsize.stepwise.max_width,
1737                                               frmsize.stepwise.max_height );
1738                 break;
1739         }
1740     }
1741 #endif
1742     return f_fps_max;
1743 }
1744
1745 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1746                               uint32_t i_pixel_format, float f_fps_min,
1747                               uint32_t *pi_width, uint32_t *pi_height )
1748 {
1749     *pi_width = 0;
1750     *pi_height = 0;
1751 #ifdef VIDIOC_ENUM_FRAMESIZES
1752 #ifdef HAVE_LIBV4L2
1753     demux_sys_t *p_sys = p_demux->p_sys;
1754 #endif
1755     /* This is new in Linux 2.6.19 */
1756     struct v4l2_frmsizeenum frmsize;
1757     memset( &frmsize, 0, sizeof(frmsize) );
1758     frmsize.pixel_format = i_pixel_format;
1759     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1760     {
1761         switch( frmsize.type )
1762         {
1763             case V4L2_FRMSIZE_TYPE_DISCRETE:
1764                 do
1765                 {
1766                     frmsize.index++;
1767                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1768                                                    i_pixel_format,
1769                                                    frmsize.discrete.width,
1770                                                    frmsize.discrete.height );
1771                     if( f_fps >= f_fps_min &&
1772                         frmsize.discrete.width > *pi_width )
1773                     {
1774                         *pi_width = frmsize.discrete.width;
1775                         *pi_height = frmsize.discrete.height;
1776                     }
1777                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1778                          &frmsize ) >= 0 );
1779                 break;
1780             case V4L2_FRMSIZE_TYPE_STEPWISE:
1781             {
1782                 uint32_t i_width = frmsize.stepwise.min_width;
1783                 uint32_t i_height = frmsize.stepwise.min_height;
1784                 for( ;
1785                      i_width <= frmsize.stepwise.max_width &&
1786                      i_height <= frmsize.stepwise.max_width;
1787                      i_width += frmsize.stepwise.step_width,
1788                      i_height += frmsize.stepwise.step_height )
1789                 {
1790                     float f_fps = GetMaxFrameRate( p_demux, i_fd,
1791                                                    i_pixel_format,
1792                                                    i_width, i_height );
1793                     if( f_fps >= f_fps_min && i_width > *pi_width )
1794                     {
1795                         *pi_width = i_width;
1796                         *pi_height = i_height;
1797                     }
1798                 }
1799                 break;
1800             }
1801             case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1802                 /* FIXME */
1803                 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1804                 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1805                                                i_pixel_format,
1806                                                frmsize.stepwise.max_width,
1807                                                frmsize.stepwise.max_height );
1808                 if( f_fps >= f_fps_min &&
1809                     frmsize.stepwise.max_width > *pi_width )
1810                 {
1811                     *pi_width = frmsize.stepwise.max_width;
1812                     *pi_height = frmsize.stepwise.max_height;
1813                 }
1814                 break;
1815         }
1816     }
1817 #endif
1818 }
1819
1820 /*****************************************************************************
1821  * OpenVideoDev: open and set up the video device and probe for capabilities
1822  *****************************************************************************/
1823 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1824 {
1825     int i_fd;
1826     struct v4l2_cropcap cropcap;
1827     struct v4l2_crop crop;
1828     struct v4l2_format fmt;
1829     unsigned int i_min;
1830     enum v4l2_buf_type buf_type;
1831     const char *psz_device = p_sys->psz_device;
1832     es_format_t es_fmt;
1833
1834     if( ( i_fd = v4l2_open( psz_device, O_RDWR ) ) < 0 )
1835     {
1836         msg_Err( p_obj, "cannot open device (%m)" );
1837         goto open_failed;
1838     }
1839
1840 #ifdef HAVE_LIBV4L2
1841     /* Note the v4l2_xxx functions are designed so that if they get passed an
1842        unknown fd, the will behave exactly as their regular xxx counterparts,
1843        so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1844        custom cam format to normal formats conversion). Chances are big we will
1845        still fail then though, as normally v4l2_fd_open only fails if the
1846        device is not a v4l2 device. */
1847     if( p_sys->b_libv4l2 )
1848     {
1849         int libv4l2_fd;
1850         libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1851         if( libv4l2_fd != -1 )
1852             i_fd = libv4l2_fd;
1853     }
1854 #endif
1855
1856     /* Tune the tuner */
1857     if( p_sys->i_frequency >= 0 )
1858     {
1859         if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1860         {
1861             msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1862             goto open_failed;
1863         }
1864         struct v4l2_frequency frequency;
1865         memset( &frequency, 0, sizeof( frequency ) );
1866         frequency.tuner = p_sys->i_cur_tuner;
1867         frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1868         frequency.frequency = p_sys->i_frequency / 62.5;
1869         if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1870         {
1871             msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1872             goto open_failed;
1873         }
1874         msg_Dbg( p_obj, "Tuner frequency set" );
1875     }
1876
1877     /* Set the tuner's audio mode */
1878     if( p_sys->i_audio_mode >= 0 )
1879     {
1880         if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1881         {
1882             msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1883             goto open_failed;
1884         }
1885         struct v4l2_tuner tuner;
1886         memset( &tuner, 0, sizeof( tuner ) );
1887         tuner.index = p_sys->i_cur_tuner;
1888         tuner.audmode = p_sys->i_audio_mode;
1889         if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1890         {
1891             msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1892             goto open_failed;
1893         }
1894         msg_Dbg( p_obj, "Tuner audio mode set" );
1895     }
1896
1897     /* Select standard */
1898
1899     if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1900     {
1901         if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1902         {
1903             msg_Err( p_obj, "cannot set standard (%m)" );
1904             goto open_failed;
1905         }
1906         if( v4l2_ioctl( i_fd, VIDIOC_G_STD, &p_sys->i_selected_standard_id ) < 0 )
1907         {
1908             msg_Err( p_obj, "cannot get standard (%m). This should never happen!" );
1909             goto open_failed;
1910         }
1911         msg_Dbg( p_obj, "Set standard to (0x%"PRIx64"):", p_sys->i_selected_standard_id );
1912         int i_standard;
1913         for( i_standard = 0; i_standard<p_sys->i_standard; i_standard++)
1914         {
1915             if( p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id )
1916             {
1917                 msg_Dbg( p_obj, "  %s",
1918                         p_sys->p_standards[i_standard].name );
1919             }
1920         }
1921     }
1922
1923     /* Select input */
1924
1925     if( p_sys->i_selected_input >= p_sys->i_input )
1926     {
1927         msg_Warn( p_obj, "invalid input. Using the default one" );
1928         p_sys->i_selected_input = 0;
1929     }
1930
1931     if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1932     {
1933         msg_Err( p_obj, "cannot set input (%m)" );
1934         goto open_failed;
1935     }
1936
1937     /* Set audio input */
1938
1939     if( p_sys->i_audio > 0 )
1940     {
1941         if( p_sys->i_selected_audio_input < 0
1942          || p_sys->i_selected_audio_input >= p_sys->i_audio )
1943         {
1944             msg_Warn( p_obj, "invalid audio input. Using the default one" );
1945             p_sys->i_selected_audio_input = 0;
1946         }
1947
1948         if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1949         {
1950             msg_Err( p_obj, "cannot set audio input (%m)" );
1951             goto open_failed;
1952         }
1953         msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1954     }
1955
1956
1957     /* TODO: Move the resolution stuff up here */
1958     /* if MPEG encoder card, no need to do anything else after this */
1959     ControlList( p_obj, p_sys, i_fd,
1960                   var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1961     SetAvailControlsByString( p_obj, p_sys, i_fd );
1962
1963     /* Verify device support for the various IO methods */
1964     switch( p_sys->io )
1965     {
1966         case IO_METHOD_READ:
1967             if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1968             {
1969                 msg_Err( p_obj, "device does not support read i/o" );
1970                 goto open_failed;
1971             }
1972             msg_Dbg( p_obj, "using read i/o" );
1973             break;
1974
1975         case IO_METHOD_MMAP:
1976         case IO_METHOD_USERPTR:
1977             if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1978             {
1979                 msg_Err( p_obj, "device does not support streaming i/o" );
1980                 goto open_failed;
1981             }
1982             if( p_sys->io == IO_METHOD_MMAP )
1983                 msg_Dbg( p_obj, "using streaming i/o (mmap)" );
1984             else
1985                 msg_Dbg( p_obj, "using streaming i/o (userptr)" );
1986             break;
1987
1988         default:
1989             msg_Err( p_obj, "io method not supported" );
1990             goto open_failed;
1991     }
1992
1993     /* Reset Cropping */
1994     memset( &cropcap, 0, sizeof(cropcap) );
1995     cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1996     if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
1997     {
1998         crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1999         crop.c = cropcap.defrect; /* reset to default */
2000         if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
2001         {
2002             if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
2003             {
2004                 switch( errno )
2005                 {
2006                     case EINVAL:
2007                         /* Cropping not supported. */
2008                         break;
2009                     default:
2010                         /* Errors ignored. */
2011                         break;
2012                 }
2013             }
2014         }
2015     }
2016
2017     /* Try and find default resolution if not specified */
2018     memset( &fmt, 0, sizeof(fmt) );
2019     fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2020
2021     if( p_sys->i_width <= 0 || p_sys->i_height <= 0 )
2022     {
2023         /* Use current width and height settings */
2024         if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
2025         {
2026             msg_Err( p_obj, "Cannot get default width and height." );
2027             goto open_failed;
2028         }
2029
2030         msg_Dbg( p_obj, "found default width and height of %ux%u",
2031                  fmt.fmt.pix.width, fmt.fmt.pix.height );
2032
2033         if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2034         {
2035             msg_Dbg( p_obj, "will try to find optimal width and height." );
2036         }
2037     }
2038     else
2039     {
2040         /* Use user specified width and height */
2041         msg_Dbg( p_obj, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
2042         fmt.fmt.pix.width = p_sys->i_width;
2043         fmt.fmt.pix.height = p_sys->i_height;
2044     }
2045
2046     fmt.fmt.pix.field = V4L2_FIELD_NONE;
2047
2048     if (b_demux)
2049     {
2050         demux_t *p_demux = (demux_t *) p_obj;
2051
2052         /* Test and set Chroma */
2053         fmt.fmt.pix.pixelformat = 0;
2054         if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
2055         {
2056             /* User specified chroma */
2057             const vlc_fourcc_t i_requested_fourcc =
2058                 vlc_fourcc_GetCodecFromString( VIDEO_ES, p_sys->psz_requested_chroma );
2059
2060             for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2061             {
2062                 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
2063                 {
2064                     fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
2065                     break;
2066                 }
2067             }
2068             /* Try and set user chroma */
2069             bool b_error = !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat );
2070             if( !b_error && fmt.fmt.pix.pixelformat )
2071             {
2072                 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2073                 {
2074                     fmt.fmt.pix.field = V4L2_FIELD_ANY;
2075                     if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2076                     {
2077                         fmt.fmt.pix.field = V4L2_FIELD_NONE;
2078                         b_error = true;
2079                     }
2080                 }
2081             }
2082             if( b_error )
2083             {
2084                 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
2085                 fmt.fmt.pix.pixelformat = 0;
2086             }
2087         }
2088
2089         /* If no user specified chroma, find best */
2090         /* This also decides if MPEG encoder card or not */
2091         if( !fmt.fmt.pix.pixelformat )
2092         {
2093             unsigned int i;
2094             for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
2095             {
2096                 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
2097                 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) )
2098                 {
2099                     if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2100                         break;
2101                     fmt.fmt.pix.field = V4L2_FIELD_ANY;
2102                     if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2103                         break;
2104                     fmt.fmt.pix.field = V4L2_FIELD_NONE;
2105                 }
2106             }
2107             if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
2108             {
2109                 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
2110                 goto open_failed;
2111             }
2112         }
2113
2114         if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2115         {
2116             if( p_sys->f_fps <= 0 )
2117             {
2118                 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
2119                                                         fmt.fmt.pix.pixelformat );
2120                 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
2121             }
2122             uint32_t i_width, i_height;
2123             GetMaxDimensions( p_demux, i_fd,
2124                               fmt.fmt.pix.pixelformat, p_sys->f_fps,
2125                               &i_width, &i_height );
2126             if( i_width || i_height )
2127             {
2128                 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f "
2129                                   "of %ux%u", p_sys->f_fps, i_width, i_height );
2130                 fmt.fmt.pix.width = i_width;
2131                 fmt.fmt.pix.height = i_height;
2132                 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2133                 {
2134                     msg_Err( p_obj, "Cannot set size to optimal dimensions "
2135                                     "%ux%u", i_width, i_height );
2136                     goto open_failed;
2137                 }
2138             }
2139             else
2140             {
2141                 msg_Warn( p_obj, "Could not find optimal width and height, "
2142                                  "falling back to driver default." );
2143             }
2144         }
2145     }
2146
2147     p_sys->i_width = fmt.fmt.pix.width;
2148     p_sys->i_height = fmt.fmt.pix.height;
2149
2150     if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
2151     /* Print extra info */
2152     msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
2153     /* Check interlacing */
2154     switch( fmt.fmt.pix.field )
2155     {
2156         case V4L2_FIELD_NONE:
2157             msg_Dbg( p_obj, "Interlacing setting: progressive" );
2158             break;
2159         case V4L2_FIELD_TOP:
2160             msg_Dbg( p_obj, "Interlacing setting: top field only" );
2161             break;
2162         case V4L2_FIELD_BOTTOM:
2163             msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
2164             break;
2165         case V4L2_FIELD_INTERLACED:
2166             msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2167             if( p_sys->i_selected_standard_id == V4L2_STD_NTSC )
2168                 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2169             else
2170                 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2171             break;
2172         case V4L2_FIELD_SEQ_TB:
2173             msg_Dbg( p_obj, "Interlacing setting: sequential top bottom (TODO)" );
2174             break;
2175         case V4L2_FIELD_SEQ_BT:
2176             msg_Dbg( p_obj, "Interlacing setting: sequential bottom top (TODO)" );
2177             break;
2178         case V4L2_FIELD_ALTERNATE:
2179             msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
2180             p_sys->i_height = p_sys->i_height * 2;
2181             break;
2182         case V4L2_FIELD_INTERLACED_TB:
2183             msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
2184             p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2185             break;
2186         case V4L2_FIELD_INTERLACED_BT:
2187             msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
2188             p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2189             break;
2190         default:
2191             msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
2192                       fmt.fmt.pix.field );
2193             break;
2194     }
2195
2196     /* Look up final fourcc */
2197     p_sys->i_fourcc = 0;
2198     for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2199     {
2200         if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2201         {
2202             p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2203             es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2204             es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2205             es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2206             es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2207             break;
2208         }
2209     }
2210
2211     /* Buggy driver paranoia */
2212     i_min = fmt.fmt.pix.width * 2;
2213     if( fmt.fmt.pix.bytesperline < i_min )
2214         fmt.fmt.pix.bytesperline = i_min;
2215     i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2216     if( fmt.fmt.pix.sizeimage < i_min )
2217         fmt.fmt.pix.sizeimage = i_min;
2218
2219 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2220     /* This is new in Linux 2.6.19 */
2221     /* List supported frame rates */
2222     struct v4l2_frmivalenum frmival;
2223     memset( &frmival, 0, sizeof(frmival) );
2224     frmival.pixel_format = fmt.fmt.pix.pixelformat;
2225     frmival.width = p_sys->i_width;
2226     frmival.height = p_sys->i_height;
2227     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2228     {
2229         char psz_fourcc[5];
2230         memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2231         vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2232         msg_Dbg( p_obj, "supported frame intervals for %4.4s, %dx%d:",
2233                  psz_fourcc, frmival.width, frmival.height );
2234         switch( frmival.type )
2235         {
2236             case V4L2_FRMIVAL_TYPE_DISCRETE:
2237                 do
2238                 {
2239                     msg_Dbg( p_obj, "    supported frame interval: %d/%d",
2240                              frmival.discrete.numerator,
2241                              frmival.discrete.denominator );
2242                     frmival.index++;
2243                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2244                 break;
2245             case V4L2_FRMIVAL_TYPE_STEPWISE:
2246                 msg_Dbg( p_obj, "    supported frame intervals: %d/%d to "
2247                          "%d/%d using %d/%d increments",
2248                          frmival.stepwise.min.numerator,
2249                          frmival.stepwise.min.denominator,
2250                          frmival.stepwise.max.numerator,
2251                          frmival.stepwise.max.denominator,
2252                          frmival.stepwise.step.numerator,
2253                          frmival.stepwise.step.denominator );
2254                 break;
2255             case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2256                 msg_Dbg( p_obj, "    supported frame intervals: %d/%d to %d/%d",
2257                          frmival.stepwise.min.numerator,
2258                          frmival.stepwise.min.denominator,
2259                          frmival.stepwise.max.numerator,
2260                          frmival.stepwise.max.denominator );
2261                 break;
2262         }
2263     }
2264 #endif
2265
2266
2267     /* Init IO method */
2268     switch( p_sys->io )
2269     {
2270     case IO_METHOD_READ:
2271         if( b_demux )
2272             if( InitRead( p_obj, p_sys, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2273         break;
2274
2275     case IO_METHOD_MMAP:
2276         if( InitMmap( p_obj, p_sys, i_fd ) != VLC_SUCCESS ) goto open_failed;
2277         break;
2278
2279     case IO_METHOD_USERPTR:
2280         if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2281         break;
2282
2283     default:
2284         goto open_failed;
2285         break;
2286     }
2287
2288     if( b_demux )
2289     {
2290         /* Add */
2291         es_fmt.video.i_width  = p_sys->i_width;
2292         es_fmt.video.i_height = p_sys->i_height;
2293
2294         /* Get aspect-ratio */
2295         es_fmt.video.i_sar_num = p_sys->i_aspect    * es_fmt.video.i_height;
2296         es_fmt.video.i_sar_den = VOUT_ASPECT_FACTOR * es_fmt.video.i_width;
2297
2298         demux_t *p_demux = (demux_t *) p_obj;
2299         msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2300             (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2301         p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2302     }
2303
2304     /* Start Capture */
2305
2306     switch( p_sys->io )
2307     {
2308     case IO_METHOD_READ:
2309         /* Nothing to do */
2310         break;
2311
2312     case IO_METHOD_MMAP:
2313         for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2314         {
2315             struct v4l2_buffer buf;
2316
2317             memset( &buf, 0, sizeof(buf) );
2318             buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2319             buf.memory = V4L2_MEMORY_MMAP;
2320             buf.index = i;
2321
2322             if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2323             {
2324                 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2325                 goto open_failed;
2326             }
2327         }
2328
2329         buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2330         if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2331         {
2332             msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2333             goto open_failed;
2334         }
2335
2336         break;
2337
2338     case IO_METHOD_USERPTR:
2339         for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2340         {
2341             struct v4l2_buffer buf;
2342
2343             memset( &buf, 0, sizeof(buf) );
2344             buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2345             buf.memory = V4L2_MEMORY_USERPTR;
2346             buf.index = i;
2347             buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2348             buf.length = p_sys->p_buffers[i].length;
2349
2350             if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2351             {
2352                 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2353                 goto open_failed;
2354             }
2355         }
2356
2357         buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2358         if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2359         {
2360             msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2361             goto open_failed;
2362         }
2363
2364         break;
2365
2366     default:
2367         goto open_failed;
2368         break;
2369     }
2370
2371     /* report fps */
2372     if( p_sys->f_fps >= 0.1 )
2373     {
2374         msg_Dbg( p_obj, "User set fps=%f", p_sys->f_fps );
2375     }
2376
2377     return i_fd;
2378
2379 open_failed:
2380     if( i_fd >= 0 ) v4l2_close( i_fd );
2381     return -1;
2382
2383 }
2384
2385 /*****************************************************************************
2386  * ProbeVideoDev: probe video for capabilities
2387  *****************************************************************************/
2388 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2389                                  const char *psz_device )
2390 {
2391     int i_index;
2392     int i_standard;
2393
2394     int i_fd;
2395
2396     if( ( i_fd = v4l2_open( psz_device, O_RDWR ) ) < 0 )
2397     {
2398         msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2399         goto open_failed;
2400     }
2401
2402 #ifdef HAVE_LIBV4L2
2403     /* Note the v4l2_xxx functions are designed so that if they get passed an
2404        unknown fd, the will behave exactly as their regular xxx counterparts,
2405        so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2406        custom cam format to normal formats conversion). Chances are big we will
2407        still fail then though, as normally v4l2_fd_open only fails if the
2408        device is not a v4l2 device. */
2409     if( p_sys->b_libv4l2 )
2410     {
2411         int libv4l2_fd;
2412         libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2413         if( libv4l2_fd != -1 )
2414             i_fd = libv4l2_fd;
2415     }
2416 #endif
2417
2418     /* Get device capabilites */
2419
2420     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2421     {
2422         msg_Err( p_obj, "cannot get video capabilities (%m)" );
2423         goto open_failed;
2424     }
2425
2426     msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2427                             p_sys->dev_cap.card,
2428                             p_sys->dev_cap.driver,
2429                             (p_sys->dev_cap.version >> 16) & 0xFF,
2430                             (p_sys->dev_cap.version >> 8) & 0xFF,
2431                             p_sys->dev_cap.version & 0xFF,
2432                             p_sys->dev_cap.bus_info );
2433
2434     msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capture, "
2435                                                        "(%c) Audio, "
2436                                                        "(%c) Tuner, "
2437                                                        "(%c) Radio",
2438              ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE  ? 'X':' '),
2439              ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO  ? 'X':' '),
2440              ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER  ? 'X':' '),
2441              ( p_sys->dev_cap.capabilities & V4L2_CAP_RADIO  ? 'X':' ') );
2442
2443     msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2444                                                  "(%c) Streaming, "
2445                                                  "(%c) Asynchronous",
2446             ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2447             ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2448             ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2449
2450     if( p_sys->io == IO_METHOD_AUTO )
2451     {
2452         if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
2453             p_sys->io = IO_METHOD_MMAP;
2454         else if( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE )
2455             p_sys->io = IO_METHOD_READ;
2456         else
2457             msg_Err( p_obj, "No known I/O method supported" );
2458     }
2459
2460     if( p_sys->dev_cap.capabilities & V4L2_CAP_RDS_CAPTURE )
2461         msg_Dbg( p_obj, "device supports RDS" );
2462
2463 #ifdef V4L2_CAP_HW_FREQ_SEEK
2464     if( p_sys->dev_cap.capabilities & V4L2_CAP_HW_FREQ_SEEK )
2465         msg_Dbg( p_obj, "device supports hardware frequency seeking" );
2466 #endif
2467     if( p_sys->dev_cap.capabilities & V4L2_CAP_VBI_CAPTURE )
2468         msg_Dbg( p_obj, "device support raw VBI capture" );
2469
2470     if( p_sys->dev_cap.capabilities & V4L2_CAP_SLICED_VBI_CAPTURE )
2471         msg_Dbg( p_obj, "device support sliced VBI capture" );
2472
2473     /* Now, enumerate all the video inputs. This is useless at the moment
2474        since we have no way to present that info to the user except with
2475        debug messages */
2476
2477     if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2478     {
2479         struct v4l2_input t_input;
2480         memset( &t_input, 0, sizeof(t_input) );
2481         p_sys->i_input = 0;
2482         while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2483         {
2484             p_sys->i_input++;
2485             t_input.index = p_sys->i_input;
2486         }
2487
2488         free( p_sys->p_inputs );
2489         p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2490         if( !p_sys->p_inputs ) goto open_failed;
2491
2492         for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2493         {
2494             p_sys->p_inputs[i_index].index = i_index;
2495
2496             if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2497             {
2498                 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2499                 goto open_failed;
2500             }
2501             msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2502                                 i_index,
2503                                 p_sys->p_inputs[i_index].name,
2504                                 p_sys->p_inputs[i_index].type
2505                                         == V4L2_INPUT_TYPE_TUNER ?
2506                                         "Tuner adapter" :
2507                                         "External analog input",
2508                                 i_index == p_sys->i_selected_input ? '*' : ' ' );
2509         }
2510     }
2511
2512     /* Probe video standards */
2513     if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2514     {
2515         struct v4l2_standard t_standards;
2516         t_standards.index = 0;
2517         p_sys->i_standard = 0;
2518         while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2519         {
2520             p_sys->i_standard++;
2521             t_standards.index = p_sys->i_standard;
2522         }
2523
2524         free( p_sys->p_standards );
2525         p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2526         if( !p_sys->p_standards ) goto open_failed;
2527
2528         for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2529         {
2530             p_sys->p_standards[i_standard].index = i_standard;
2531
2532             if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2533             {
2534                 msg_Err( p_obj, "cannot get video input standards (%m)" );
2535                 goto open_failed;
2536             }
2537             msg_Dbg( p_obj, "video standard %i is: %s %c",
2538                                 i_standard,
2539                                 p_sys->p_standards[i_standard].name,
2540                                 (p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id) ? '*' : ' ' );
2541         }
2542     }
2543
2544     /* initialize the structures for the ioctls */
2545     for( i_index = 0; i_index < 32; i_index++ )
2546     {
2547         p_sys->p_audios[i_index].index = i_index;
2548     }
2549
2550     /* Probe audio inputs */
2551     if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2552     {
2553         while( p_sys->i_audio < 32 &&
2554                v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2555         {
2556             if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2557             {
2558                 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2559                 goto open_failed;
2560             }
2561
2562             msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2563                                 p_sys->i_audio,
2564                                 p_sys->p_audios[p_sys->i_audio].name,
2565                                 p_sys->p_audios[p_sys->i_audio].capability &
2566                                                     V4L2_AUDCAP_STEREO ?
2567                                         "Stereo" : "Mono",
2568                                 p_sys->p_audios[p_sys->i_audio].capability &
2569                                                     V4L2_AUDCAP_AVL ?
2570                                     "(Automatic Volume Level supported)" : "",
2571                                 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2572
2573             p_sys->i_audio++;
2574         }
2575     }
2576
2577     /* List tuner caps */
2578     if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2579     {
2580         struct v4l2_tuner tuner;
2581         memset( &tuner, 0, sizeof(tuner) );
2582         p_sys->i_tuner = 0;
2583         while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2584         {
2585             p_sys->i_tuner++;
2586             memset( &tuner, 0, sizeof(tuner) );
2587             tuner.index = p_sys->i_tuner;
2588         }
2589
2590         free( p_sys->p_tuners );
2591         p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2592         if( !p_sys->p_tuners ) goto open_failed;
2593
2594         for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2595         {
2596             p_sys->p_tuners[i_index].index = i_index;
2597
2598             if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2599             {
2600                 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2601                 goto open_failed;
2602             }
2603             msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2604                               "frequency range: %.1f %s -> %.1f %s",
2605                                 i_index,
2606                                 p_sys->p_tuners[i_index].name,
2607                                 p_sys->p_tuners[i_index].type
2608                                         == V4L2_TUNER_RADIO ?
2609                                         "Radio" : "Analog TV",
2610                                 p_sys->p_tuners[i_index].rangelow * 62.5,
2611                                 p_sys->p_tuners[i_index].capability &
2612                                         V4L2_TUNER_CAP_LOW ?
2613                                         "Hz" : "kHz",
2614                                 p_sys->p_tuners[i_index].rangehigh * 62.5,
2615                                 p_sys->p_tuners[i_index].capability &
2616                                         V4L2_TUNER_CAP_LOW ?
2617                                         "Hz" : "kHz" );
2618
2619             struct v4l2_frequency frequency;
2620             memset( &frequency, 0, sizeof( frequency ) );
2621             if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2622             {
2623                 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2624                 goto open_failed;
2625             }
2626             msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2627                      i_index,
2628                      p_sys->p_tuners[i_index].name,
2629                      frequency.frequency * 62.5,
2630                      p_sys->p_tuners[i_index].capability &
2631                              V4L2_TUNER_CAP_LOW ?
2632                              "Hz" : "kHz" );
2633         }
2634     }
2635
2636     /* Probe for available chromas */
2637     if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2638     {
2639         struct v4l2_fmtdesc codec;
2640
2641         i_index = 0;
2642         memset( &codec, 0, sizeof(codec) );
2643         codec.index = i_index;
2644         codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2645
2646         while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2647         {
2648             i_index++;
2649             codec.index = i_index;
2650         }
2651
2652         p_sys->i_codec = i_index;
2653
2654         free( p_sys->p_codecs );
2655         p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2656
2657         for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2658         {
2659             p_sys->p_codecs[i_index].index = i_index;
2660             p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2661
2662             if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2663             {
2664                 msg_Err( p_obj, "cannot get codec description (%m)" );
2665                 goto open_failed;
2666             }
2667
2668             /* only print if vlc supports the format */
2669             char psz_fourcc_v4l2[5];
2670             memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2671             vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2672                                 &psz_fourcc_v4l2 );
2673             bool b_codec_supported = false;
2674             for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2675             {
2676                 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2677                 {
2678                     b_codec_supported = true;
2679
2680                     char psz_fourcc[5];
2681                     memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2682                     vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2683                                         &psz_fourcc );
2684                     msg_Dbg( p_obj, "device supports chroma %4.4s [%s, %s]",
2685                                 psz_fourcc,
2686                                 p_sys->p_codecs[i_index].description,
2687                                 psz_fourcc_v4l2 );
2688
2689 #ifdef VIDIOC_ENUM_FRAMESIZES
2690                     /* This is new in Linux 2.6.19 */
2691                     /* List valid frame sizes for this format */
2692                     struct v4l2_frmsizeenum frmsize;
2693                     memset( &frmsize, 0, sizeof(frmsize) );
2694                     frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2695                     if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2696                     {
2697                         /* Not all devices support this ioctl */
2698                         msg_Warn( p_obj, "Unable to query for frame sizes" );
2699                     }
2700                     else
2701                     {
2702                         switch( frmsize.type )
2703                         {
2704                             case V4L2_FRMSIZE_TYPE_DISCRETE:
2705                                 do
2706                                 {
2707                                     msg_Dbg( p_obj,
2708                 "    device supports size %dx%d",
2709                 frmsize.discrete.width, frmsize.discrete.height );
2710                                     frmsize.index++;
2711                                 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2712                                 break;
2713                             case V4L2_FRMSIZE_TYPE_STEPWISE:
2714                                 msg_Dbg( p_obj,
2715                 "    device supports sizes %dx%d to %dx%d using %dx%d increments",
2716                 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2717                 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2718                 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2719                                 break;
2720                             case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2721                                 msg_Dbg( p_obj,
2722                 "    device supports all sizes %dx%d to %dx%d",
2723                 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2724                 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2725                                 break;
2726                         }
2727                     }
2728 #endif
2729                 }
2730             }
2731             if( !b_codec_supported )
2732             {
2733                     msg_Dbg( p_obj,
2734                          "device codec %4.4s (%s) not supported",
2735                          psz_fourcc_v4l2,
2736                          p_sys->p_codecs[i_index].description );
2737             }
2738         }
2739     }
2740
2741
2742     if( i_fd >= 0 ) v4l2_close( i_fd );
2743     return true;
2744
2745 open_failed:
2746
2747     if( i_fd >= 0 ) v4l2_close( i_fd );
2748     return false;
2749
2750 }
2751
2752 static void name2var( unsigned char *name )
2753 {
2754     for( ; *name; name++ )
2755         *name = (*name == ' ') ? '_' : tolower( *name );
2756 }
2757
2758 /*****************************************************************************
2759  * Print a user-class v4l2 control's details, create the relevant variable,
2760  * change the value if needed.
2761  *****************************************************************************/
2762 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2763                               struct v4l2_queryctrl queryctrl,
2764                               bool b_reset, bool b_demux )
2765 {
2766     struct v4l2_querymenu querymenu;
2767     unsigned int i_mid;
2768
2769     int i;
2770     int i_val;
2771
2772     char *psz_name;
2773     vlc_value_t val, val2;
2774
2775     if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2776         msg_Dbg( p_obj, "    control is busy" );
2777     if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2778         msg_Dbg( p_obj, "    control is read-only" );
2779
2780     for( i = 0; controls[i].psz_name != NULL; i++ )
2781         if( controls[i].i_cid == queryctrl.id ) break;
2782
2783     if( controls[i].psz_name )
2784     {
2785         psz_name = strdup( controls[i].psz_name );
2786         char psz_cfg_name[40];
2787         sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2788         i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2789         var_Destroy( p_obj, psz_cfg_name );
2790     }
2791     else
2792     {
2793         psz_name = strdup( (const char *)queryctrl.name );
2794         name2var( (unsigned char *)psz_name );
2795         i_val = -1;
2796     }
2797
2798     switch( queryctrl.type )
2799     {
2800         case V4L2_CTRL_TYPE_INTEGER:
2801             msg_Dbg( p_obj, "    integer control" );
2802             msg_Dbg( p_obj,
2803                      "    valid values: %d to %d by steps of %d",
2804                      queryctrl.minimum, queryctrl.maximum,
2805                      queryctrl.step );
2806
2807             var_Create( p_obj, psz_name,
2808                         VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2809                       | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2810             val.i_int = queryctrl.minimum;
2811             var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2812             val.i_int = queryctrl.maximum;
2813             var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2814             val.i_int = queryctrl.step;
2815             var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2816             break;
2817         case V4L2_CTRL_TYPE_BOOLEAN:
2818             msg_Dbg( p_obj, "    boolean control" );
2819             var_Create( p_obj, psz_name,
2820                         VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2821             break;
2822         case V4L2_CTRL_TYPE_MENU:
2823             msg_Dbg( p_obj, "    menu control" );
2824             var_Create( p_obj, psz_name,
2825                         VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2826                       | VLC_VAR_ISCOMMAND );
2827             memset( &querymenu, 0, sizeof( querymenu ) );
2828             for( i_mid = queryctrl.minimum;
2829                  i_mid <= (unsigned)queryctrl.maximum;
2830                  i_mid++ )
2831             {
2832                 querymenu.index = i_mid;
2833                 querymenu.id = queryctrl.id;
2834                 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2835                 {
2836                     msg_Dbg( p_obj, "        %d: %s",
2837                              querymenu.index, querymenu.name );
2838                     val.i_int = querymenu.index;
2839                     val2.psz_string = (char *)querymenu.name;
2840                     var_Change( p_obj, psz_name,
2841                                 VLC_VAR_ADDCHOICE, &val, &val2 );
2842                 }
2843             }
2844             break;
2845         case V4L2_CTRL_TYPE_BUTTON:
2846             msg_Dbg( p_obj, "    button control" );
2847             var_Create( p_obj, psz_name,
2848                         VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2849             break;
2850         case V4L2_CTRL_TYPE_CTRL_CLASS:
2851             msg_Dbg( p_obj, "    control class" );
2852             var_Create( p_obj, psz_name, VLC_VAR_VOID );
2853             break;
2854         default:
2855             msg_Dbg( p_obj, "    unknown control type (FIXME)" );
2856             /* FIXME */
2857             break;
2858     }
2859
2860     switch( queryctrl.type )
2861     {
2862         case V4L2_CTRL_TYPE_INTEGER:
2863         case V4L2_CTRL_TYPE_BOOLEAN:
2864         case V4L2_CTRL_TYPE_MENU:
2865             {
2866                 struct v4l2_control control;
2867                 msg_Dbg( p_obj, "    default value: %d",
2868                          queryctrl.default_value );
2869                 memset( &control, 0, sizeof( control ) );
2870                 control.id = queryctrl.id;
2871                 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2872                 {
2873                     msg_Dbg( p_obj, "    current value: %d", control.value );
2874                 }
2875                 if( i_val == -1 )
2876                 {
2877                     i_val = control.value;
2878                     if( b_reset && queryctrl.default_value != control.value )
2879                     {
2880                         msg_Dbg( p_obj, "    reset value to default" );
2881                         Control( p_obj, p_sys, i_fd, psz_name,
2882                                  queryctrl.id, queryctrl.default_value );
2883                     }
2884                 }
2885                 else
2886                 {
2887                     Control( p_obj, p_sys, i_fd, psz_name,
2888                              queryctrl.id, i_val );
2889                 }
2890             }
2891             break;
2892         default:
2893             break;
2894     }
2895
2896     val.psz_string = (char *)queryctrl.name;
2897     var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2898     val.i_int = queryctrl.id;
2899     val2.psz_string = (char *)psz_name;
2900     var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2901     /* bad things happen changing MPEG mid-stream
2902      * so don't add to Ext Settings GUI */
2903     if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2904         var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2905
2906     switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2907     {
2908         case VLC_VAR_BOOL:
2909             var_SetBool( p_obj, psz_name, i_val );
2910             break;
2911         case VLC_VAR_INTEGER:
2912             var_SetInteger( p_obj, psz_name, i_val );
2913             break;
2914         case VLC_VAR_VOID:
2915             break;
2916         default:
2917             msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2918                       __LINE__ );
2919             break;
2920     }
2921
2922     if( b_demux )
2923         var_AddCallback( p_obj, psz_name,
2924                         DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2925     else
2926         var_AddCallback( p_obj, psz_name,
2927                         AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2928
2929     free( psz_name );
2930 }
2931
2932 /*****************************************************************************
2933  * List all user-class v4l2 controls, set them to the user specified
2934  * value and create the relevant variables to enable runtime changes
2935  *****************************************************************************/
2936 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2937                         bool b_reset, bool b_demux )
2938 {
2939     struct v4l2_queryctrl queryctrl;
2940     int i_cid;
2941
2942     memset( &queryctrl, 0, sizeof( queryctrl ) );
2943
2944     /* A list of available controls (aka the variable name) will be
2945      * stored as choices in the "allcontrols" variable. We'll thus be able
2946      * to use those to create an appropriate interface
2947      * A list of available controls that can be changed mid-stream will
2948      * be stored in the "controls" variable */
2949     var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2950     var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2951
2952     var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2953
2954     /* Add a control to reset all controls to their default values */
2955     vlc_value_t val, val2;
2956     var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2957     val.psz_string = _( "Reset controls to default" );
2958     var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2959     val.i_int = -1;
2960     val2.psz_string = (char *)"controls-reset";
2961     var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2962     if (b_demux)
2963         var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2964     else
2965         var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2966
2967     queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2968     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2969     {
2970         msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2971
2972         /* List extended controls */
2973         queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2974         while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2975         {
2976             if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2977             {
2978                 msg_Dbg( p_obj, "%s", queryctrl.name );
2979                 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2980                 continue;
2981             }
2982             switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2983             {
2984                 case V4L2_CTRL_CLASS_USER:
2985                     msg_Dbg( p_obj, "Available control: %s (%x)",
2986                              queryctrl.name, queryctrl.id );
2987                     break;
2988                 case V4L2_CTRL_CLASS_MPEG:
2989                     name2var( queryctrl.name );
2990                     msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2991                              queryctrl.name, queryctrl.id );
2992                     break;
2993                 default:
2994                     msg_Dbg( p_obj, "Available private control: %s (%x)",
2995                              queryctrl.name, queryctrl.id );
2996                     break;
2997             }
2998             ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
2999             queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3000         }
3001     }
3002     else
3003     {
3004         msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
3005
3006         /* List public controls */
3007         for( i_cid = V4L2_CID_BASE;
3008              i_cid < V4L2_CID_LASTP1;
3009              i_cid ++ )
3010         {
3011             queryctrl.id = i_cid;
3012             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3013             {
3014                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3015                     continue;
3016                 msg_Dbg( p_obj, "Available control: %s (%x)",
3017                          queryctrl.name, queryctrl.id );
3018                 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3019                                   b_reset, b_demux );
3020             }
3021         }
3022
3023         /* List private controls */
3024         for( i_cid = V4L2_CID_PRIVATE_BASE;
3025              ;
3026              i_cid ++ )
3027         {
3028             queryctrl.id = i_cid;
3029             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3030             {
3031                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3032                     continue;
3033                 msg_Dbg( p_obj, "Available private control: %s (%x)",
3034                          queryctrl.name, queryctrl.id );
3035                 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3036                                   b_reset, b_demux );
3037             }
3038             else
3039                 break;
3040         }
3041     }
3042
3043     return VLC_SUCCESS;
3044 }
3045
3046 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
3047                                       int i_fd )
3048 {
3049     char *psz_parser = p_sys->psz_set_ctrls;
3050     vlc_value_t val, text, name;
3051
3052     if( psz_parser == NULL )
3053         return;
3054
3055     if( *psz_parser == '{' )
3056         psz_parser++;
3057
3058     int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
3059                             &val, &text );
3060     if( i_ret < 0 )
3061     {
3062         msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
3063         return;
3064     }
3065
3066     while( *psz_parser && *psz_parser != '}' )
3067     {
3068         char *psz_delim, *psz_assign;
3069
3070         while( *psz_parser == ',' || *psz_parser == ' ' )
3071             psz_parser++;
3072
3073         psz_delim = strchr( psz_parser, ',' );
3074         if( psz_delim == NULL )
3075             psz_delim = strchr( psz_parser, '}' );
3076         if( psz_delim == NULL )
3077             psz_delim = psz_parser + strlen( psz_parser );
3078
3079         psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
3080         if( psz_assign == NULL )
3081         {
3082             char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
3083             msg_Err( p_obj, "%s missing '='", psz_name );
3084             free( psz_name );
3085             psz_parser = psz_delim + 1;
3086             continue;
3087         }
3088
3089         for( int i = 0;
3090              i < val.p_list->i_count ;//&& psz_parser < psz_assign;
3091              i++ )
3092         {
3093             const char *psz_var = text.p_list->p_values[i].psz_string;
3094             int i_cid = val.p_list->p_values[i].i_int;
3095             var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
3096             const char *psz_name = name.psz_string;
3097
3098             int i_availstrlen = strlen( psz_name );
3099             int i_parsestrlen = psz_assign - psz_parser;
3100             int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
3101
3102             if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
3103             {
3104                 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
3105                          strtol( ++psz_assign, &psz_parser, 0) );
3106             }
3107             free( name.psz_string );
3108         }
3109
3110         if( psz_parser < psz_assign )
3111         {
3112             char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
3113             msg_Err( p_obj, "Control %s not available", psz_name );
3114             free( psz_name );
3115             psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
3116         }
3117     }
3118     var_FreeList( &val, &text );
3119 }
3120
3121 /*****************************************************************************
3122  * Reset all user-class v4l2 controls to their default value
3123  *****************************************************************************/
3124 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
3125 {
3126     struct v4l2_queryctrl queryctrl;
3127     int i_cid;
3128     memset( &queryctrl, 0, sizeof( queryctrl ) );
3129
3130     queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3131     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3132     {
3133         /* Extended control API supported */
3134         queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3135         while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3136         {
3137             if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
3138              || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
3139             {
3140                 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3141                 continue;
3142             }
3143             struct v4l2_control control;
3144             memset( &control, 0, sizeof( control ) );
3145             control.id = queryctrl.id;
3146             if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3147              && queryctrl.default_value != control.value )
3148             {
3149                 int i;
3150                 for( i = 0; controls[i].psz_name != NULL; i++ )
3151                     if( controls[i].i_cid == queryctrl.id ) break;
3152                 name2var( queryctrl.name );
3153                 Control( p_obj, p_sys, i_fd,
3154                          controls[i].psz_name ? controls[i].psz_name
3155                           : (const char *)queryctrl.name,
3156                          queryctrl.id, queryctrl.default_value );
3157             }
3158             queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3159         }
3160     }
3161     else
3162     {
3163
3164         /* public controls */
3165         for( i_cid = V4L2_CID_BASE;
3166              i_cid < V4L2_CID_LASTP1;
3167              i_cid ++ )
3168         {
3169             queryctrl.id = i_cid;
3170             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3171             {
3172                 struct v4l2_control control;
3173                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3174                     continue;
3175                 memset( &control, 0, sizeof( control ) );
3176                 control.id = queryctrl.id;
3177                 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3178                  && queryctrl.default_value != control.value )
3179                 {
3180                     int i;
3181                     for( i = 0; controls[i].psz_name != NULL; i++ )
3182                         if( controls[i].i_cid == queryctrl.id ) break;
3183                     name2var( queryctrl.name );
3184                     Control( p_obj, p_sys, i_fd,
3185                              controls[i].psz_name ? controls[i].psz_name
3186                               : (const char *)queryctrl.name,
3187                              queryctrl.id, queryctrl.default_value );
3188                 }
3189             }
3190         }
3191
3192         /* private controls */
3193         for( i_cid = V4L2_CID_PRIVATE_BASE;
3194              ;
3195              i_cid ++ )
3196         {
3197             queryctrl.id = i_cid;
3198             if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3199             {
3200                 struct v4l2_control control;
3201                 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3202                     continue;
3203                 memset( &control, 0, sizeof( control ) );
3204                 control.id = queryctrl.id;
3205                 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3206                  && queryctrl.default_value != control.value )
3207                 {
3208                     name2var( queryctrl.name );
3209                     Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3210                              queryctrl.id, queryctrl.default_value );
3211                 }
3212             }
3213             else
3214                 break;
3215         }
3216     }
3217     return VLC_SUCCESS;
3218 }
3219
3220 /*****************************************************************************
3221  * Issue user-class v4l2 controls
3222  *****************************************************************************/
3223 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3224                     const char *psz_name, int i_cid, int i_value )
3225 {
3226     (void)p_sys;
3227     struct v4l2_queryctrl queryctrl;
3228     struct v4l2_control control;
3229     struct v4l2_ext_control ext_control;
3230     struct v4l2_ext_controls ext_controls;
3231
3232     if( i_value == -1 )
3233         return VLC_SUCCESS;
3234
3235     memset( &queryctrl, 0, sizeof( queryctrl ) );
3236
3237     queryctrl.id = i_cid;
3238
3239     if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3240         || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3241     {
3242         msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3243         return VLC_EGENERIC;
3244     }
3245
3246     memset( &control, 0, sizeof( control ) );
3247     memset( &ext_control, 0, sizeof( ext_control ) );
3248     memset( &ext_controls, 0, sizeof( ext_controls ) );
3249     control.id = i_cid;
3250     ext_control.id = i_cid;
3251     ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3252     ext_controls.count = 1;
3253     ext_controls.controls = &ext_control;
3254
3255     int i_ret = -1;
3256
3257     if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3258     {
3259         ext_control.value = i_value;
3260         if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3261         {
3262             control.value = i_value;
3263             if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3264             {
3265                 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3266                          psz_name, i_cid, i_value );
3267                 return VLC_EGENERIC;
3268             }
3269             i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3270         }
3271         else
3272         {
3273             i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3274             control.value = ext_control.value;
3275         }
3276     }
3277
3278     if( i_ret >= 0 )
3279     {
3280         vlc_value_t val;
3281         msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3282         switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3283         {
3284             case VLC_VAR_BOOL:
3285                 val.b_bool = control.value;
3286                 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3287                 var_TriggerCallback( p_obj, "controls-update" );
3288                 break;
3289             case VLC_VAR_INTEGER:
3290                 val.i_int = control.value;
3291                 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3292                 var_TriggerCallback( p_obj, "controls-update" );
3293                 break;
3294         }
3295     }
3296     return VLC_SUCCESS;
3297 }
3298
3299 /*****************************************************************************
3300  * On the fly change settings callback
3301  *****************************************************************************/
3302 static int DemuxControlCallback( vlc_object_t *p_this,
3303     const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3304     void *p_data )
3305 {
3306     (void)oldval;
3307     demux_t *p_demux = (demux_t*)p_this;
3308     demux_sys_t *p_sys = p_demux->p_sys;
3309     int i_cid = (long int)p_data;
3310
3311     int i_fd = p_sys->i_fd;
3312
3313     if( i_fd < 0 )
3314         return VLC_EGENERIC;
3315
3316     Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3317
3318     return VLC_EGENERIC;
3319 }
3320
3321 static int DemuxControlResetCallback( vlc_object_t *p_this,
3322     const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3323 {
3324     (void)psz_var;    (void)oldval;    (void)newval;    (void)p_data;
3325     demux_t *p_demux = (demux_t*)p_this;
3326     demux_sys_t *p_sys = p_demux->p_sys;
3327
3328     int i_fd = p_sys->i_fd;
3329
3330     if( i_fd < 0 )
3331         return VLC_EGENERIC;
3332
3333     ControlReset( p_this, p_sys, i_fd );
3334
3335     return VLC_EGENERIC;
3336 }
3337
3338 static int AccessControlCallback( vlc_object_t *p_this,
3339     const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3340     void *p_data )
3341 {
3342     (void)oldval;
3343     access_t *p_access = (access_t *)p_this;
3344     demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3345     int i_cid = (long int)p_data;
3346
3347     int i_fd = p_sys->i_fd;
3348
3349     if( i_fd < 0 )
3350         return VLC_EGENERIC;
3351
3352     Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3353
3354     return VLC_EGENERIC;
3355 }
3356
3357 static int AccessControlResetCallback( vlc_object_t *p_this,
3358     const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3359 {
3360     (void)psz_var;     (void)oldval;     (void)newval;     (void)p_data;
3361     access_t *p_access = (access_t *)p_this;
3362     demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3363
3364     int i_fd = p_sys->i_fd;
3365
3366     if( i_fd < 0 )
3367         return VLC_EGENERIC;
3368
3369     ControlReset( p_this, p_sys, i_fd );
3370
3371     return VLC_EGENERIC;
3372 }