git.sesse.net Git - vlc/blob - modules/access/v4l.c

   1 /*****************************************************************************
   2  * v4l.c : Video4Linux input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Author: Laurent Aimar <fenrir@via.ecp.fr>
   8  *         Paul Forgey <paulf at aphrodite dot com>
   9  *         Gildas Bazin <gbazin@videolan.org>
  10  *         Benjamin Pracht <bigben at videolan dot org>
  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  * Preamble
  29  *****************************************************************************/
  30 #define _GNU_SOURCE
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34
  35 #include <vlc/vlc.h>
  36 #include <vlc_input.h>
  37 #include <vlc_demux.h>
  38 #include <vlc_access.h>
  39 #include <vlc_vout.h>
  40 #include <vlc_codecs.h>
  41
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44 #include <sys/ioctl.h>
  45 #include <unistd.h>
  46 #include <sys/mman.h>
  47 #include <errno.h>
  48 #include <fcntl.h>
  49
  50 /* From GStreamer's v4l plugin:
  51  * Because of some really cool feature in video4linux1, also known as
  52  * 'not including sys/types.h and sys/time.h', we had to include it
  53  * ourselves. In all their intelligence, these people decided to fix
  54  * this in the next version (video4linux2) in such a cool way that it
  55  * breaks all compilations of old stuff...
  56  * The real problem is actually that linux/time.h doesn't use proper
  57  * macro checks before defining types like struct timeval. The proper
  58  * fix here is to either fuck the kernel header (which is what we do
  59  * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
  60  * upstream, which I'll consider doing later on. If you get compiler
  61  * errors here, check your linux/time.h && sys/time.h header setup.
  62 */
  63 #define _LINUX_TIME_H
  64
  65 #include <linux/videodev.h>
  66 #include "videodev_mjpeg.h"
  67
  68 #include <sys/soundcard.h>
  69
  70 /*****************************************************************************
  71  * Module descriptior
  72  *****************************************************************************/
  73 static int  Open ( vlc_object_t * );
  74 static void Close( vlc_object_t * );
  75
  76 #define CACHING_TEXT N_("Caching value in ms")
  77 #define CACHING_LONGTEXT N_( \
  78     "Caching value for V4L captures. This " \
  79     "value should be set in milliseconds." )
  80 #define VDEV_TEXT N_("Video device name")
  81 #define VDEV_LONGTEXT N_( \
  82     "Name of the video device to use. " \
  83     "If you don't specify anything, no video device will be used.")
  84 #define ADEV_TEXT N_("Audio device name")
  85 #define ADEV_LONGTEXT N_( \
  86     "Name of the audio device to use. " \
  87     "If you don't specify anything, no audio device will be used.")
  88 #define CHROMA_TEXT N_("Video input chroma format")
  89 #define CHROMA_LONGTEXT N_( \
  90     "Force the Video4Linux video device to use a specific chroma format " \
  91     "(eg. I420 (default), RV24, etc.)")
  92 #define FREQUENCY_TEXT N_( "Frequency" )
  93 #define FREQUENCY_LONGTEXT N_( \
  94     "Frequency to capture (in kHz), if applicable." )
  95 #define CHANNEL_TEXT N_( "Channel" )
  96 #define CHANNEL_LONGTEXT N_( \
  97     "Channel of the card to use (Usually, 0 = tuner, " \
  98     "1 = composite, 2 = svideo)." )
  99 #define NORM_TEXT N_( "Norm" )
 100 #define NORM_LONGTEXT N_( \
 101     "Norm of the stream (Automatic, SECAM, PAL, or NTSC)." )
 102 #define AUDIO_TEXT N_( "Audio Channel" )
 103 #define AUDIO_LONGTEXT N_( \
 104     "Audio Channel to use, if there are several audio inputs." )
 105 #define WIDTH_TEXT N_( "Width" )
 106 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
 107     "(-1 for autodetect)." )
 108 #define HEIGHT_TEXT N_( "Height" )
 109 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
 110     "(-1 for autodetect)." )
 111 #define BRIGHTNESS_TEXT N_( "Brightness" )
 112 #define BRIGHTNESS_LONGTEXT N_( \
 113     "Brightness of the video input." )
 114 #define HUE_TEXT N_( "Hue" )
 115 #define HUE_LONGTEXT N_( \
 116     "Hue of the video input." )
 117 #define COLOUR_TEXT N_( "Color" )
 118 #define COLOUR_LONGTEXT N_( \
 119     "Color of the video input." )
 120 #define CONTRAST_TEXT N_( "Contrast" )
 121 #define CONTRAST_LONGTEXT N_( \
 122     "Contrast of the video input." )
 123 #define TUNER_TEXT N_( "Tuner" )
 124 #define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones." )
 125 #define SAMPLERATE_TEXT N_( "Samplerate" )
 126 #define SAMPLERATE_LONGTEXT N_( \
 127     "Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100)" )
 128 #define STEREO_TEXT N_( "Stereo" )
 129 #define STEREO_LONGTEXT N_( \
 130     "Capture the audio stream in stereo." )
 131 #define MJPEG_TEXT N_( "MJPEG" )
 132 #define MJPEG_LONGTEXT N_(  \
 133     "Set this option if the capture device outputs MJPEG" )
 134 #define DECIMATION_TEXT N_( "Decimation" )
 135 #define DECIMATION_LONGTEXT N_( \
 136     "Decimation level for MJPEG streams" )
 137 #define QUALITY_TEXT N_( "Quality" )
 138 #define QUALITY_LONGTEXT N_( "Quality of the stream." )
 139 #define FPS_TEXT N_( "Framerate" )
 140 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
 141     "(-1 for autodetect)." )
 142
 143 static int i_norm_list[] =
 144     { VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
 145 static char *psz_norm_list_text[] =
 146     { N_("Automatic"), N_("SECAM"), N_("PAL"),  N_("NTSC") };
 147
 148 vlc_module_begin();
 149     set_shortname( _("Video4Linux") );
 150     set_description( _("Video4Linux input") );
 151     set_category( CAT_INPUT );
 152     set_subcategory( SUBCAT_INPUT_ACCESS );
 153
 154     add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
 155                  CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
 156     add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
 157                 VLC_FALSE );
 158     add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
 159                 VLC_FALSE );
 160     add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 161                 VLC_TRUE );
 162     add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
 163     add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
 164                 SAMPLERATE_LONGTEXT, VLC_TRUE );
 165     add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
 166                 VLC_TRUE );
 167     add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, VLC_TRUE );
 168     add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
 169                 VLC_FALSE );
 170         change_integer_list( i_norm_list, psz_norm_list_text, 0 );
 171     add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
 172                 VLC_FALSE );
 173     add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, VLC_TRUE );
 174     add_bool( "v4l-stereo", VLC_TRUE, NULL, STEREO_TEXT, STEREO_LONGTEXT,
 175             VLC_TRUE );
 176     add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, VLC_TRUE );
 177     add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
 178                 VLC_TRUE );
 179     add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
 180                 BRIGHTNESS_LONGTEXT, VLC_TRUE );
 181     add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
 182                 VLC_TRUE );
 183     add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, VLC_TRUE );
 184     add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
 185                 VLC_TRUE );
 186     add_bool( "v4l-mjpeg", VLC_FALSE, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
 187             VLC_TRUE );
 188     add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
 189             DECIMATION_LONGTEXT, VLC_TRUE );
 190     add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
 191             VLC_TRUE );
 192
 193     add_shortcut( "v4l" );
 194     set_capability( "access_demux", 10 );
 195     set_callbacks( Open, Close );
 196 vlc_module_end();
 197
 198 /*****************************************************************************
 199  * Access: local prototypes
 200  *****************************************************************************/
 201 static int Demux  ( demux_t * );
 202 static int Control( demux_t *, int, va_list );
 203
 204 static void ParseMRL    ( demux_t * );
 205 static int  OpenVideoDev( demux_t *, char * );
 206 static int  OpenAudioDev( demux_t *, char * );
 207
 208 static block_t *GrabAudio( demux_t * );
 209 static block_t *GrabVideo( demux_t * );
 210
 211 #define MJPEG_BUFFER_SIZE (256*1024)
 212
 213 struct quicktime_mjpeg_app1
 214 {
 215     uint32_t    i_reserved;             /* set to 0 */
 216     uint32_t    i_tag;                  /* 'mjpg' */
 217     uint32_t    i_field_size;           /* offset following EOI */
 218     uint32_t    i_padded_field_size;    /* offset following EOI+pad */
 219     uint32_t    i_next_field;           /* offset to next field */
 220     uint32_t    i_DQT_offset;
 221     uint32_t    i_DHT_offset;
 222     uint32_t    i_SOF_offset;
 223     uint32_t    i_SOS_offset;
 224     uint32_t    i_data_offset;          /* following SOS marker data */
 225 };
 226
 227 static struct
 228 {
 229     int i_v4l;
 230     int i_fourcc;
 231
 232 } v4lchroma_to_fourcc[] =
 233 {
 234     { VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
 235     { VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
 236     { VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
 237     { VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
 238     { VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
 239     { VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
 240     { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
 241     { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
 242     { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
 243     { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
 244     { VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
 245     { VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
 246     { VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
 247     { VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
 248     { VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
 249     { VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
 250     { VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
 251     { 0, 0 }
 252 };
 253
 254 struct demux_sys_t
 255 {
 256     /* Devices */
 257     char *psz_device;         /* Main device from MRL, can be video or audio */
 258
 259     char *psz_vdev;
 260     int  fd_video;
 261
 262     char *psz_adev;
 263     int  fd_audio;
 264
 265     /* Video properties */
 266     picture_t pic;
 267
 268     int i_fourcc;
 269     int i_channel;
 270     int i_audio;
 271     int i_norm;
 272     int i_tuner;
 273     int i_frequency;
 274     int i_width;
 275     int i_height;
 276
 277     int i_brightness;
 278     int i_hue;
 279     int i_colour;
 280     int i_contrast;
 281
 282     float f_fps;            /* <= 0.0 mean to grab at full rate */
 283     mtime_t i_video_pts;    /* only used when f_fps > 0 */
 284
 285     vlc_bool_t b_mjpeg;
 286     int i_decimation;
 287     int i_quality;
 288
 289     struct video_capability vid_cap;
 290     struct video_mbuf       vid_mbuf;
 291     struct mjpeg_requestbuffers mjpeg_buffers;
 292
 293     uint8_t *p_video_mmap;
 294     int     i_frame_pos;
 295
 296     struct video_mmap   vid_mmap;
 297     struct video_picture vid_picture;
 298
 299     int          i_video_frame_size;
 300     es_out_id_t  *p_es_video;
 301
 302     /* Audio properties */
 303     vlc_fourcc_t i_acodec_raw;
 304     int          i_sample_rate;
 305     vlc_bool_t   b_stereo;
 306     int          i_audio_max_frame_size;
 307     block_t      *p_block_audio;
 308     es_out_id_t  *p_es_audio;
 309 };
 310
 311 /*****************************************************************************
 312  * Open: opens v4l device
 313  *****************************************************************************
 314  *
 315  * url: <video device>::::
 316  *
 317  *****************************************************************************/
 318 static int Open( vlc_object_t *p_this )
 319 {
 320     demux_t     *p_demux = (demux_t*)p_this;
 321     demux_sys_t *p_sys;
 322     vlc_value_t val;
 323
 324     /* Only when selected */
 325     if( *p_demux->psz_access == '\0' )
 326         return VLC_EGENERIC;
 327
 328     /* Set up p_demux */
 329     p_demux->pf_demux = Demux;
 330     p_demux->pf_control = Control;
 331     p_demux->info.i_update = 0;
 332     p_demux->info.i_title = 0;
 333     p_demux->info.i_seekpoint = 0;
 334     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 335     memset( p_sys, 0, sizeof( demux_sys_t ) );
 336
 337     var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 338     var_Get( p_demux, "v4l-audio", &val );
 339     p_sys->i_audio          = val.i_int;
 340
 341     var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 342     var_Get( p_demux, "v4l-channel", &val );
 343     p_sys->i_channel        = val.i_int;
 344
 345     var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 346     var_Get( p_demux, "v4l-norm", &val );
 347     p_sys->i_norm           = val.i_int;
 348
 349     var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 350     var_Get( p_demux, "v4l-tuner", &val );
 351     p_sys->i_tuner          = val.i_int;
 352
 353     var_Create( p_demux, "v4l-frequency",
 354                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 355     var_Get( p_demux, "v4l-frequency", &val );
 356     p_sys->i_frequency      = val.i_int;
 357
 358     var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 359     var_Get( p_demux, "v4l-fps", &val );
 360     p_sys->f_fps            = val.f_float;
 361
 362     var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 363     var_Get( p_demux, "v4l-width", &val );
 364     p_sys->i_width          = val.i_int;
 365
 366     var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 367     var_Get( p_demux, "v4l-height", &val );
 368     p_sys->i_height         = val.i_int;
 369
 370     p_sys->i_video_pts      = -1;
 371
 372     var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
 373                                                         VLC_VAR_DOINHERIT );
 374     var_Get( p_demux, "v4l-brightness", &val );
 375     p_sys->i_brightness     = val.i_int;
 376
 377     var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 378     var_Get( p_demux, "v4l-hue", &val );
 379     p_sys->i_hue            = -1;
 380
 381     var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 382     var_Get( p_demux, "v4l-colour", &val );
 383     p_sys->i_colour         = val.i_int;
 384
 385     var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 386     var_Get( p_demux, "v4l-contrast", &val );
 387     p_sys->i_contrast       = val.i_int;
 388
 389     var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 390     var_Get( p_demux, "v4l-mjpeg", &val );
 391     p_sys->b_mjpeg     = val.b_bool;
 392
 393     var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
 394                                                             VLC_VAR_DOINHERIT );
 395     var_Get( p_demux, "v4l-decimation", &val );
 396     p_sys->i_decimation = val.i_int;
 397
 398     var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 399     var_Get( p_demux, "v4l-quality", &val );
 400     p_sys->i_quality = val.i_int;
 401
 402     var_Create( p_demux, "v4l-samplerate",
 403                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 404     var_Get( p_demux, "v4l-samplerate", &val );
 405     p_sys->i_sample_rate  = val.i_int;
 406
 407     var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 408     var_Get( p_demux, "v4l-stereo", &val );
 409     p_sys->b_stereo       = val.b_bool;
 410
 411     p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
 412     p_sys->fd_video = -1;
 413     p_sys->fd_audio = -1;
 414
 415     p_sys->p_es_video = p_sys->p_es_audio = 0;
 416     p_sys->p_block_audio = 0;
 417
 418     ParseMRL( p_demux );
 419
 420     /* Find main device (video or audio) */
 421     if( p_sys->psz_device && *p_sys->psz_device )
 422     {
 423         msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
 424
 425         /* Try to open as video device */
 426         p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
 427
 428         if( p_sys->fd_video < 0 )
 429         {
 430             /* Try to open as audio device */
 431             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
 432             if( p_sys->fd_audio >= 0 )
 433             {
 434                 if( p_sys->psz_adev ) free( p_sys->psz_adev );
 435                 p_sys->psz_adev = p_sys->psz_device;
 436                 p_sys->psz_device = NULL;
 437             }
 438         }
 439         else
 440         {
 441             if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
 442             p_sys->psz_vdev = p_sys->psz_device;
 443             p_sys->psz_device = NULL;
 444         }
 445     }
 446
 447     /* If no device opened, only continue if the access was forced */
 448     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 449     {
 450         if( strcmp( p_demux->psz_access, "v4l" ) )
 451         {
 452             Close( p_this );
 453             return VLC_EGENERIC;
 454         }
 455     }
 456
 457     /* Find video device */
 458     if( p_sys->fd_video < 0 )
 459     {
 460         if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
 461         {
 462             if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
 463             p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
 464         }
 465
 466         if( p_sys->psz_vdev && *p_sys->psz_vdev )
 467         {
 468             p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
 469         }
 470     }
 471
 472     /* Find audio device */
 473     if( p_sys->fd_audio < 0 )
 474     {
 475         if( !p_sys->psz_adev || !*p_sys->psz_adev )
 476         {
 477             if( p_sys->psz_adev ) free( p_sys->psz_adev );
 478             p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
 479         }
 480
 481         if( p_sys->psz_adev && *p_sys->psz_adev )
 482         {
 483             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
 484         }
 485     }
 486
 487     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 488     {
 489         Close( p_this );
 490         return VLC_EGENERIC;
 491     }
 492
 493     msg_Dbg( p_demux, "v4l grabbing started" );
 494
 495     /* Declare elementary streams */
 496     if( p_sys->fd_video >= 0 )
 497     {
 498         es_format_t fmt;
 499         es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
 500         fmt.video.i_width  = p_sys->i_width;
 501         fmt.video.i_height = p_sys->i_height;
 502         fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
 503
 504         /* Setup rgb mask for RGB formats */
 505         if( p_sys->i_fourcc == VLC_FOURCC('R','V','2','4') )
 506         {
 507             /* This is in BGR format */
 508             fmt.video.i_bmask = 0x00ff0000;
 509             fmt.video.i_gmask = 0x0000ff00;
 510             fmt.video.i_rmask = 0x000000ff;
 511         }
 512
 513         msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
 514                  (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
 515         p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
 516     }
 517
 518     if( p_sys->fd_audio >= 0 )
 519     {
 520         es_format_t fmt;
 521         es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
 522
 523         fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
 524         fmt.audio.i_rate = p_sys->i_sample_rate;
 525         fmt.audio.i_bitspersample = 16; // FIXME ?
 526         fmt.audio.i_blockalign = fmt.audio.i_channels *
 527             fmt.audio.i_bitspersample / 8;
 528         fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
 529             fmt.audio.i_bitspersample;
 530
 531         msg_Dbg( p_demux, "new audio es %d channels %dHz",
 532                  fmt.audio.i_channels, fmt.audio.i_rate );
 533
 534         p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
 535     }
 536
 537     /* Update default_pts to a suitable value for access */
 538     var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 539
 540     return VLC_SUCCESS;
 541 }
 542
 543 /*****************************************************************************
 544  * Close: close device, free resources
 545  *****************************************************************************/
 546 static void Close( vlc_object_t *p_this )
 547 {
 548     demux_t     *p_demux = (demux_t *)p_this;
 549     demux_sys_t *p_sys   = p_demux->p_sys;
 550
 551     if( p_sys->psz_device ) free( p_sys->psz_device );
 552     if( p_sys->psz_vdev )   free( p_sys->psz_vdev );
 553     if( p_sys->psz_adev )   free( p_sys->psz_adev );
 554     if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
 555     if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
 556     if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
 557
 558     if( p_sys->b_mjpeg )
 559     {
 560         int i_noframe = -1;
 561         ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
 562     }
 563
 564     if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
 565     {
 566         if( p_sys->b_mjpeg )
 567             munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
 568                     p_sys->mjpeg_buffers.count );
 569         else
 570             munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
 571     }
 572
 573     free( p_sys );
 574 }
 575
 576 /*****************************************************************************
 577  * Control:
 578  *****************************************************************************/
 579 static int Control( demux_t *p_demux, int i_query, va_list args )
 580 {
 581     vlc_bool_t *pb;
 582     int64_t    *pi64;
 583
 584     switch( i_query )
 585     {
 586         /* Special for access_demux */
 587         case DEMUX_CAN_PAUSE:
 588         case DEMUX_SET_PAUSE_STATE:
 589         case DEMUX_CAN_CONTROL_PACE:
 590             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 591             *pb = VLC_FALSE;
 592             return VLC_SUCCESS;
 593
 594         case DEMUX_GET_PTS_DELAY:
 595             pi64 = (int64_t*)va_arg( args, int64_t * );
 596             *pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
 597             return VLC_SUCCESS;
 598
 599         case DEMUX_GET_TIME:
 600             pi64 = (int64_t*)va_arg( args, int64_t * );
 601             *pi64 = mdate();
 602             return VLC_SUCCESS;
 603
 604         /* TODO implement others */
 605         default:
 606             return VLC_EGENERIC;
 607     }
 608
 609     return VLC_EGENERIC;
 610 }
 611
 612 /*****************************************************************************
 613  * Demux:
 614  *****************************************************************************/
 615 static int Demux( demux_t *p_demux )
 616 {
 617     demux_sys_t *p_sys = p_demux->p_sys;
 618     es_out_id_t  *p_es = p_sys->p_es_audio;
 619     block_t *p_block = NULL;
 620
 621     /* Try grabbing audio frames first */
 622     if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
 623     {
 624         /* Try grabbing video frame */
 625         p_es = p_sys->p_es_video;
 626         if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
 627     }
 628
 629     if( !p_block )
 630     {
 631         /* Sleep so we do not consume all the cpu, 10ms seems
 632          * like a good value (100fps) */
 633         msleep( 10000 );
 634         return 1;
 635     }
 636
 637     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
 638     es_out_Send( p_demux->out, p_es, p_block );
 639
 640     return 1;
 641 }
 642
 643 /*****************************************************************************
 644  * ParseMRL: parse the options contained in the MRL
 645  *****************************************************************************/
 646 static void ParseMRL( demux_t *p_demux )
 647 {
 648     demux_sys_t *p_sys = p_demux->p_sys;
 649
 650     char *psz_dup = strdup( p_demux->psz_path );
 651     char *psz_parser = psz_dup;
 652
 653     while( *psz_parser && *psz_parser != ':' )
 654     {
 655         psz_parser++;
 656     }
 657
 658     if( *psz_parser == ':' )
 659     {
 660         /* read options */
 661         for( ;; )
 662         {
 663             *psz_parser++ = '\0';
 664             if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
 665             {
 666                 p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
 667                                            &psz_parser, 0 );
 668             }
 669             else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
 670             {
 671                 psz_parser += strlen( "norm=" );
 672                 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
 673                 {
 674                     p_sys->i_norm = VIDEO_MODE_PAL;
 675                     psz_parser += strlen( "pal" );
 676                 }
 677                 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
 678                 {
 679                     p_sys->i_norm = VIDEO_MODE_NTSC;
 680                     psz_parser += strlen( "ntsc" );
 681                 }
 682                 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
 683                 {
 684                     p_sys->i_norm = VIDEO_MODE_SECAM;
 685                     psz_parser += strlen( "secam" );
 686                 }
 687                 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
 688                 {
 689                     p_sys->i_norm = VIDEO_MODE_AUTO;
 690                     psz_parser += strlen( "auto" );
 691                 }
 692                 else
 693                 {
 694                     p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
 695                 }
 696             }
 697             else if( !strncmp( psz_parser, "frequency=",
 698                                strlen( "frequency=" ) ) )
 699             {
 700                 p_sys->i_frequency =
 701                     strtol( psz_parser + strlen( "frequency=" ),
 702                             &psz_parser, 0 );
 703                 if( p_sys->i_frequency < 30000 )
 704                 {
 705                     msg_Warn( p_demux, "v4l syntax has changed : "
 706                               "'frequency' is now channel frequency in kHz");
 707                 }
 708             }
 709             else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
 710             {
 711                 p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
 712                                          &psz_parser, 0 );
 713             }
 714             else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
 715             {
 716                 psz_parser += strlen( "size=" );
 717                 if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
 718                 {
 719                     p_sys->i_width  = 128;
 720                     p_sys->i_height = 96;
 721                 }
 722                 else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
 723                 {
 724                     p_sys->i_width  = 160;
 725                     p_sys->i_height = 120;
 726                 }
 727                 else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
 728                 {
 729                     p_sys->i_width  = 176;
 730                     p_sys->i_height = 144;
 731                 }
 732                 else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
 733                 {
 734                     p_sys->i_width  = 320;
 735                     p_sys->i_height = 244;
 736                 }
 737                 else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
 738                 {
 739                     p_sys->i_width  = 352;
 740                     p_sys->i_height = 288;
 741                 }
 742                 else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
 743                 {
 744                     p_sys->i_width  = 640;
 745                     p_sys->i_height = 480;
 746                 }
 747                 else
 748                 {
 749                     /* widthxheight */
 750                     p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
 751                     if( *psz_parser == 'x' || *psz_parser == 'X')
 752                     {
 753                         p_sys->i_height = strtol( psz_parser + 1,
 754                                                   &psz_parser, 0 );
 755                     }
 756                     msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
 757                              p_sys->i_height );
 758                 }
 759             }
 760             else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
 761             {
 762                 p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
 763                                               &psz_parser, 0 );
 764             }
 765             else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
 766             {
 767                 p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
 768                                           &psz_parser, 0 );
 769             }
 770             else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
 771             {
 772                 p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
 773                                        &psz_parser, 0 );
 774             }
 775             else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
 776             {
 777                 p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
 778                                             &psz_parser, 0 );
 779             }
 780             else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
 781             {
 782                 p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
 783                                          &psz_parser, 0 );
 784             }
 785             else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
 786             {
 787                 int  i_len;
 788
 789                 psz_parser += strlen( "adev=" );
 790                 if( strchr( psz_parser, ':' ) )
 791                 {
 792                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 793                 }
 794                 else
 795                 {
 796                     i_len = strlen( psz_parser );
 797                 }
 798
 799                 p_sys->psz_adev = strndup( psz_parser, i_len );
 800
 801                 psz_parser += i_len;
 802             }
 803             else if( !strncmp( psz_parser, "samplerate=",
 804                                strlen( "samplerate=" ) ) )
 805             {
 806                 p_sys->i_sample_rate =
 807                     strtol( psz_parser + strlen( "samplerate=" ),
 808                             &psz_parser, 0 );
 809             }
 810             else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
 811             {
 812                 psz_parser += strlen( "stereo" );
 813
 814                 p_sys->b_stereo = VLC_TRUE;
 815             }
 816             else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
 817             {
 818                 psz_parser += strlen( "mono" );
 819
 820                 p_sys->b_stereo = VLC_FALSE;
 821             }
 822             else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
 823             {
 824                 psz_parser += strlen( "mjpeg" );
 825
 826                 p_sys->b_mjpeg = VLC_TRUE;
 827             }
 828             else if( !strncmp( psz_parser, "decimation=",
 829                         strlen( "decimation=" ) ) )
 830             {
 831                 p_sys->i_decimation =
 832                     strtol( psz_parser + strlen( "decimation=" ),
 833                             &psz_parser, 0 );
 834             }
 835             else if( !strncmp( psz_parser, "quality=",
 836                         strlen( "quality=" ) ) )
 837             {
 838                 p_sys->i_quality =
 839                     strtol( psz_parser + strlen( "quality=" ),
 840                             &psz_parser, 0 );
 841             }
 842             else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
 843             {
 844                 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
 845                                        &psz_parser );
 846             }
 847             else
 848             {
 849                 msg_Warn( p_demux, "unknown option" );
 850             }
 851
 852             while( *psz_parser && *psz_parser != ':' )
 853             {
 854                 psz_parser++;
 855             }
 856
 857             if( *psz_parser == '\0' )
 858             {
 859                 break;
 860             }
 861         }
 862     }
 863
 864     if( *psz_dup )
 865     {
 866         p_sys->psz_device = strdup( psz_dup );
 867     }
 868     if( psz_dup ) free( psz_dup );
 869 }
 870
 871 /*****************************************************************************
 872  * OpenVideoDev:
 873  *****************************************************************************/
 874 static int OpenVideoDev( demux_t *p_demux, char *psz_device )
 875 {
 876     demux_sys_t *p_sys = p_demux->p_sys;
 877     int i_fd;
 878
 879     struct video_channel vid_channel;
 880     struct mjpeg_params mjpeg;
 881     int i;
 882
 883     if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
 884     {
 885         msg_Err( p_demux, "cannot open device (%s)", strerror( errno ) );
 886         goto vdev_failed;
 887     }
 888
 889     if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
 890     {
 891         msg_Err( p_demux, "cannot get capabilities (%s)", strerror( errno ) );
 892         goto vdev_failed;
 893     }
 894
 895     msg_Dbg( p_demux,
 896              "V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
 897              p_sys->vid_cap.name,
 898              p_sys->vid_cap.channels,
 899              p_sys->vid_cap.audios,
 900              p_sys->vid_cap.minwidth,  p_sys->vid_cap.maxwidth,
 901              p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
 902
 903     if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
 904     {
 905         msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
 906         p_sys->i_channel = 0;
 907     }
 908     if( p_sys->vid_cap.audios && p_sys->i_audio >= p_sys->vid_cap.audios )
 909     {
 910         msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
 911         p_sys->i_audio = -1;
 912     }
 913
 914     if( p_sys->i_width < p_sys->vid_cap.minwidth ||
 915         p_sys->i_width > p_sys->vid_cap.maxwidth )
 916     {
 917         msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
 918         p_sys->i_width = 0;
 919     }
 920     if( p_sys->i_height < p_sys->vid_cap.minheight ||
 921         p_sys->i_height > p_sys->vid_cap.maxheight )
 922     {
 923         msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
 924         p_sys->i_height = 0;
 925     }
 926
 927     if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
 928     {
 929         msg_Err( p_demux, "cannot grab" );
 930         goto vdev_failed;
 931     }
 932
 933     vid_channel.channel = p_sys->i_channel;
 934     if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
 935     {
 936         msg_Err( p_demux, "cannot get channel infos (%s)",
 937                           strerror( errno ) );
 938         goto vdev_failed;
 939     }
 940     msg_Dbg( p_demux,
 941              "setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
 942              vid_channel.name, vid_channel.channel, vid_channel.tuners,
 943              vid_channel.flags, vid_channel.type, vid_channel.norm );
 944
 945     if( p_sys->i_tuner >= vid_channel.tuners )
 946     {
 947         msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
 948         p_sys->i_tuner = 0;
 949     }
 950
 951     vid_channel.norm = p_sys->i_norm;
 952     if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
 953     {
 954         msg_Err( p_demux, "cannot set channel (%s)", strerror( errno ) );
 955         goto vdev_failed;
 956     }
 957
 958     if( vid_channel.flags & VIDEO_VC_TUNER )
 959     {
 960
 961         /* set tuner */
 962 #if 0
 963         struct video_tuner vid_tuner;
 964         if( p_sys->i_tuner >= 0 )
 965         {
 966             vid_tuner.tuner = p_sys->i_tuner;
 967             if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
 968             {
 969                 msg_Err( p_demux, "cannot get tuner (%s)", strerror( errno ) );
 970                 goto vdev_failed;
 971             }
 972             msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
 973                      "mode=0x%x signal=0x%x",
 974                      vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
 975                      vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
 976
 977             msg_Dbg( p_demux, "setting tuner %s (%d)",
 978                      vid_tuner.name, vid_tuner.tuner );
 979
 980             /* FIXME FIXME to be checked FIXME FIXME */
 981             //vid_tuner.mode = p_sys->i_norm;
 982             if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
 983             {
 984                 msg_Err( p_demux, "cannot set tuner (%s)", strerror( errno ) );
 985                 goto vdev_failed;
 986             }
 987         }
 988 #endif
 989
 990         /* Show a warning if frequency is < than 30000.
 991          * User is certainly usint old syntax. */
 992
 993
 994         /* set frequency */
 995         if( p_sys->i_frequency >= 0 )
 996         {
 997             int driver_frequency = p_sys->i_frequency * 16 /1000;
 998             if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
 999             {
1000                 msg_Err( p_demux, "cannot set frequency (%s)",
1001                                   strerror( errno ) );
1002                 goto vdev_failed;
1003             }
1004             msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1005                                                    driver_frequency );
1006         }
1007     }
1008
1009     /* set audio */
1010     if( vid_channel.flags & VIDEO_VC_AUDIO )
1011     {
1012         struct video_audio      vid_audio;
1013
1014         /* XXX TODO volume, balance, ... */
1015         if( p_sys->i_audio >= 0 )
1016         {
1017             vid_audio.audio = p_sys->i_audio;
1018             if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1019             {
1020                 msg_Err( p_demux, "cannot get audio (%s)", strerror( errno ) );
1021                 goto vdev_failed;
1022             }
1023
1024             /* unmute audio */
1025             vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1026
1027             if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1028             {
1029                 msg_Err( p_demux, "cannot set audio (%s)", strerror( errno ) );
1030                 goto vdev_failed;
1031             }
1032         }
1033
1034     }
1035
1036     /* establish basic params with input and norm before feeling width
1037      * or height */
1038     if( p_sys->b_mjpeg )
1039     {
1040         struct quicktime_mjpeg_app1 *p_app1;
1041         int32_t i_offset;
1042
1043         if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1044         {
1045             msg_Err( p_demux, "cannot get mjpeg params (%s)",
1046                               strerror( errno ) );
1047             goto vdev_failed;
1048         }
1049         mjpeg.input = p_sys->i_channel;
1050         mjpeg.norm  = p_sys->i_norm;
1051         mjpeg.decimation = p_sys->i_decimation;
1052
1053         if( p_sys->i_width )
1054             mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1055         if( p_sys->i_height )
1056             mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1057
1058         /* establish Quicktime APP1 marker while we are here */
1059         mjpeg.APPn = 1;
1060         mjpeg.APP_len = 40;
1061
1062         /* aligned */
1063         p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1064         p_app1->i_reserved = 0;
1065         p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1066         p_app1->i_field_size = 0;
1067         p_app1->i_padded_field_size = 0;
1068         p_app1->i_next_field = 0;
1069         /* XXX WARNING XXX */
1070         /* these's nothing magic about these values.  We are dangerously
1071          * assuming the encoder card is encoding mjpeg-a and is not throwing
1072          * in marker tags we aren't expecting.  It's bad enough we have to
1073          * search through the jpeg output for every frame we grab just to
1074          * find the first field's end marker, so we take this risk to boost
1075          * performance.
1076          * This is really something the driver could do for us because this
1077          * does conform to standards outside of Apple Quicktime.
1078          */
1079         i_offset = 0x2e;
1080         p_app1->i_DQT_offset = hton32( i_offset );
1081         i_offset = 0xb4;
1082         p_app1->i_DHT_offset = hton32( i_offset );
1083         i_offset = 0x258;
1084         p_app1->i_SOF_offset = hton32( i_offset );
1085         i_offset = 0x26b;
1086         p_app1->i_SOS_offset = hton32( i_offset );
1087         i_offset = 0x279;
1088         p_app1->i_data_offset = hton32( i_offset );
1089
1090         /* SOF and SOS aren't specified by the mjpeg API because they aren't
1091          * optional.  They will be present in the output. */
1092         mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1093
1094         if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1095         {
1096             msg_Err( p_demux, "cannot set mjpeg params (%s)",
1097                               strerror( errno ) );
1098             goto vdev_failed;
1099         }
1100
1101         p_sys->i_width = mjpeg.img_width * mjpeg.HorDcm;
1102         p_sys->i_height = mjpeg.img_height * mjpeg.VerDcm *
1103             mjpeg.field_per_buff;
1104     }
1105
1106     /* fix width/height */
1107     if( !p_sys->b_mjpeg && ( p_sys->i_width == 0 || p_sys->i_height == 0 ) )
1108     {
1109         struct video_window vid_win;
1110
1111         if( ioctl( i_fd, VIDIOCGWIN, &vid_win ) < 0 )
1112         {
1113             msg_Err( p_demux, "cannot get win (%s)", strerror( errno ) );
1114             goto vdev_failed;
1115         }
1116         p_sys->i_width  = vid_win.width;
1117         p_sys->i_height = vid_win.height;
1118
1119         if( !p_sys->i_width || !p_sys->i_height )
1120         {
1121             p_sys->i_width = p_sys->vid_cap.maxwidth;
1122             p_sys->i_height = p_sys->vid_cap.maxheight;
1123         }
1124
1125         if( !p_sys->i_width || !p_sys->i_height )
1126         {
1127             msg_Err( p_demux, "invalid video size (%ix%i)",
1128                      p_sys->i_width, p_sys->i_height );
1129             goto vdev_failed;
1130         }
1131
1132         msg_Dbg( p_demux, "will use %dx%d", p_sys->i_width, p_sys->i_height );
1133     }
1134
1135     if( !p_sys->b_mjpeg )
1136     {
1137         /* set hue/color/.. */
1138         if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1139         {
1140             struct video_picture vid_picture = p_sys->vid_picture;
1141
1142             if( p_sys->i_brightness >= 0 && p_sys->i_brightness < 65536 )
1143             {
1144                 vid_picture.brightness = p_sys->i_brightness;
1145             }
1146             if( p_sys->i_colour >= 0 && p_sys->i_colour < 65536 )
1147             {
1148                 vid_picture.colour = p_sys->i_colour;
1149             }
1150             if( p_sys->i_hue >= 0 && p_sys->i_hue < 65536 )
1151             {
1152                 vid_picture.hue = p_sys->i_hue;
1153             }
1154             if( p_sys->i_contrast  >= 0 && p_sys->i_contrast < 65536 )
1155             {
1156                 vid_picture.contrast = p_sys->i_contrast;
1157             }
1158             if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1159             {
1160                 msg_Dbg( p_demux, "v4l device uses brightness: %d",
1161                          vid_picture.brightness );
1162                 msg_Dbg( p_demux, "v4l device uses colour: %d",
1163                          vid_picture.colour );
1164                 msg_Dbg( p_demux, "v4l device uses hue: %d", vid_picture.hue );
1165                 msg_Dbg( p_demux, "v4l device uses contrast: %d",
1166                          vid_picture.contrast );
1167                 p_sys->vid_picture = vid_picture;
1168             }
1169         }
1170
1171         /* Find out video format used by device */
1172         if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1173         {
1174             struct video_picture vid_picture = p_sys->vid_picture;
1175             char *psz;
1176             int i;
1177
1178             p_sys->i_fourcc = 0;
1179
1180             psz = var_CreateGetString( p_demux, "v4l-chroma" );
1181             if( strlen( psz ) >= 4 )
1182             {
1183                 vid_picture.palette = 0;
1184                 int i_chroma = VLC_FOURCC( psz[0], psz[1], psz[2], psz[3] );
1185
1186                 /* Find out v4l chroma code */
1187                 for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1188                 {
1189                     if( v4lchroma_to_fourcc[i].i_fourcc == i_chroma )
1190                     {
1191                         vid_picture.palette = v4lchroma_to_fourcc[i].i_v4l;
1192                         break;
1193                     }
1194                 }
1195             }
1196             free( psz );
1197
1198             if( vid_picture.palette &&
1199                 !ioctl( i_fd, VIDIOCSPICT, &vid_picture ) )
1200             {
1201                 p_sys->vid_picture = vid_picture;
1202             }
1203             else
1204             {
1205                 /* Try to set the format to something easy to encode */
1206                 vid_picture.palette = VIDEO_PALETTE_YUV420P;
1207                 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1208                 {
1209                     p_sys->vid_picture = vid_picture;
1210                 }
1211                 else
1212                 {
1213                     vid_picture.palette = VIDEO_PALETTE_YUV422P;
1214                     if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1215                     {
1216                         p_sys->vid_picture = vid_picture;
1217                     }
1218                 }
1219             }
1220
1221             /* Find out final format */
1222             for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1223             {
1224                 if( v4lchroma_to_fourcc[i].i_v4l == p_sys->vid_picture.palette)
1225                 {
1226                     p_sys->i_fourcc = v4lchroma_to_fourcc[i].i_fourcc;
1227                     break;
1228                 }
1229             }
1230         }
1231         else
1232         {
1233             msg_Err( p_demux, "ioctl VIDIOCGPICT failed" );
1234             goto vdev_failed;
1235         }
1236     }
1237
1238     if( p_sys->b_mjpeg )
1239     {
1240         int i;
1241
1242         p_sys->mjpeg_buffers.count = 8;
1243         p_sys->mjpeg_buffers.size = MJPEG_BUFFER_SIZE;
1244
1245         if( ioctl( i_fd, MJPIOC_REQBUFS, &p_sys->mjpeg_buffers ) < 0 )
1246         {
1247             msg_Err( p_demux, "mmap unsupported" );
1248             goto vdev_failed;
1249         }
1250
1251         p_sys->p_video_mmap = mmap( 0,
1252                 p_sys->mjpeg_buffers.size * p_sys->mjpeg_buffers.count,
1253                 PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, 0 );
1254         if( p_sys->p_video_mmap == MAP_FAILED )
1255         {
1256             msg_Err( p_demux, "mmap failed" );
1257             goto vdev_failed;
1258         }
1259
1260         p_sys->i_fourcc  = VLC_FOURCC( 'm','j','p','g' );
1261         p_sys->i_frame_pos = -1;
1262
1263         /* queue up all the frames */
1264         for( i = 0; i < (int)p_sys->mjpeg_buffers.count; i++ )
1265         {
1266             if( ioctl( i_fd, MJPIOC_QBUF_CAPT, &i ) < 0 )
1267             {
1268                 msg_Err( p_demux, "unable to queue frame" );
1269                 goto vdev_failed;
1270             }
1271         }
1272     }
1273     else
1274     {
1275         /* Fill in picture_t fields */
1276         vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic, p_sys->i_fourcc,
1277                           p_sys->i_width, p_sys->i_height, p_sys->i_width *
1278                           VOUT_ASPECT_FACTOR / p_sys->i_height );
1279         if( !p_sys->pic.i_planes )
1280         {
1281             msg_Err( p_demux, "unsupported chroma" );
1282             goto vdev_failed;
1283         }
1284         p_sys->i_video_frame_size = 0;
1285         for( i = 0; i < p_sys->pic.i_planes; i++ )
1286         {
1287             p_sys->i_video_frame_size += p_sys->pic.p[i].i_visible_lines *
1288               p_sys->pic.p[i].i_visible_pitch;
1289         }
1290
1291         msg_Dbg( p_demux, "v4l device uses frame size: %i",
1292                  p_sys->i_video_frame_size );
1293         msg_Dbg( p_demux, "v4l device uses chroma: %4.4s",
1294                 (char*)&p_sys->i_fourcc );
1295
1296         /* Allocate mmap buffer */
1297         if( ioctl( i_fd, VIDIOCGMBUF, &p_sys->vid_mbuf ) < 0 )
1298         {
1299             msg_Err( p_demux, "mmap unsupported" );
1300             goto vdev_failed;
1301         }
1302
1303         p_sys->p_video_mmap = mmap( 0, p_sys->vid_mbuf.size,
1304                                     PROT_READ|PROT_WRITE, MAP_SHARED,
1305                                     i_fd, 0 );
1306         if( p_sys->p_video_mmap == MAP_FAILED )
1307         {
1308             /* FIXME -> normal read */
1309             msg_Err( p_demux, "mmap failed" );
1310             goto vdev_failed;
1311         }
1312
1313         /* init grabbing */
1314         p_sys->vid_mmap.frame  = 0;
1315         p_sys->vid_mmap.width  = p_sys->i_width;
1316         p_sys->vid_mmap.height = p_sys->i_height;
1317         p_sys->vid_mmap.format = p_sys->vid_picture.palette;
1318         if( ioctl( i_fd, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1319         {
1320             msg_Warn( p_demux, "%4.4s refused", (char*)&p_sys->i_fourcc );
1321             msg_Err( p_demux, "chroma selection failed" );
1322             goto vdev_failed;
1323         }
1324     }
1325     return i_fd;
1326
1327 vdev_failed:
1328
1329     if( i_fd >= 0 ) close( i_fd );
1330     return -1;
1331 }
1332
1333 /*****************************************************************************
1334  * OpenAudioDev:
1335  *****************************************************************************/
1336 static int OpenAudioDev( demux_t *p_demux, char *psz_device )
1337 {
1338     demux_sys_t *p_sys = p_demux->p_sys;
1339     int i_fd, i_format;
1340
1341     if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
1342     {
1343         msg_Err( p_demux, "cannot open audio device (%s)", strerror( errno ) );
1344         goto adev_fail;
1345     }
1346
1347     i_format = AFMT_S16_LE;
1348     if( ioctl( i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
1349         || i_format != AFMT_S16_LE )
1350     {
1351         msg_Err( p_demux, "cannot set audio format (16b little endian) "
1352                  "(%s)", strerror( errno ) );
1353         goto adev_fail;
1354     }
1355
1356     if( ioctl( i_fd, SNDCTL_DSP_STEREO,
1357                &p_sys->b_stereo ) < 0 )
1358     {
1359         msg_Err( p_demux, "cannot set audio channels count (%s)",
1360                  strerror( errno ) );
1361         goto adev_fail;
1362     }
1363
1364     if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1365                &p_sys->i_sample_rate ) < 0 )
1366     {
1367         msg_Err( p_demux, "cannot set audio sample rate (%s)",
1368                  strerror( errno ) );
1369         goto adev_fail;
1370     }
1371
1372     msg_Dbg( p_demux, "openened adev=`%s' %s %dHz",
1373              psz_device, p_sys->b_stereo ? "stereo" : "mono",
1374              p_sys->i_sample_rate );
1375
1376     p_sys->i_audio_max_frame_size = 6 * 1024;
1377
1378     return i_fd;
1379
1380  adev_fail:
1381
1382     if( i_fd >= 0 ) close( i_fd );
1383     return -1;
1384 }
1385
1386 /*****************************************************************************
1387  * GrabAudio: grab audio
1388  *****************************************************************************/
1389 static block_t *GrabAudio( demux_t *p_demux )
1390 {
1391     demux_sys_t *p_sys = p_demux->p_sys;
1392     struct audio_buf_info buf_info;
1393     int i_read, i_correct;
1394     block_t *p_block;
1395
1396     if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
1397     else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
1398
1399     if( !p_block )
1400     {
1401         msg_Warn( p_demux, "cannot get block" );
1402         return 0;
1403     }
1404
1405     p_sys->p_block_audio = p_block;
1406
1407     i_read = read( p_sys->fd_audio, p_block->p_buffer,
1408                    p_sys->i_audio_max_frame_size );
1409
1410     if( i_read <= 0 ) return 0;
1411
1412     p_block->i_buffer = i_read;
1413     p_sys->p_block_audio = 0;
1414
1415     /* Correct the date because of kernel buffering */
1416     i_correct = i_read;
1417     if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
1418     {
1419         i_correct += buf_info.bytes;
1420     }
1421
1422     p_block->i_pts = p_block->i_dts =
1423         mdate() - I64C(1000000) * (mtime_t)i_correct /
1424         2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
1425
1426     return p_block;
1427 }
1428
1429 /*****************************************************************************
1430  * GrabVideo:
1431  *****************************************************************************/
1432 static uint8_t *GrabCapture( demux_t *p_demux )
1433 {
1434     demux_sys_t *p_sys = p_demux->p_sys;
1435     int i_captured_frame = p_sys->i_frame_pos;
1436
1437     p_sys->vid_mmap.frame = (p_sys->i_frame_pos + 1) % p_sys->vid_mbuf.frames;
1438
1439     while( ioctl( p_sys->fd_video, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1440     {
1441         if( errno != EAGAIN )
1442         {
1443             msg_Err( p_demux, "failed capturing new frame" );
1444             return NULL;
1445         }
1446
1447         if( p_demux->b_die )
1448         {
1449             return NULL;
1450         }
1451
1452         msg_Dbg( p_demux, "grab failed, trying again" );
1453     }
1454
1455     while( ioctl(p_sys->fd_video, VIDIOCSYNC, &p_sys->i_frame_pos) < 0 )
1456     {
1457         if( errno != EAGAIN && errno != EINTR )
1458         {
1459             msg_Err( p_demux, "failed syncing new frame" );
1460             return NULL;
1461         }
1462     }
1463
1464     p_sys->i_frame_pos = p_sys->vid_mmap.frame;
1465     /* leave i_video_frame_size alone */
1466     return p_sys->p_video_mmap + p_sys->vid_mbuf.offsets[i_captured_frame];
1467 }
1468
1469 static uint8_t *GrabMJPEG( demux_t *p_demux )
1470 {
1471     demux_sys_t *p_sys = p_demux->p_sys;
1472     struct mjpeg_sync sync;
1473     uint8_t *p_frame, *p_field, *p;
1474     uint16_t tag;
1475     uint32_t i_size;
1476     struct quicktime_mjpeg_app1 *p_app1 = NULL;
1477
1478     /* re-queue the last frame we sync'd */
1479     if( p_sys->i_frame_pos != -1 )
1480     {
1481         while( ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT,
1482                                        &p_sys->i_frame_pos ) < 0 )
1483         {
1484             if( errno != EAGAIN && errno != EINTR )
1485             {
1486                 msg_Err( p_demux, "failed capturing new frame" );
1487                 return NULL;
1488             }
1489         }
1490     }
1491
1492     /* sync on the next frame */
1493     while( ioctl( p_sys->fd_video, MJPIOC_SYNC, &sync ) < 0 )
1494     {
1495         if( errno != EAGAIN && errno != EINTR )
1496         {
1497             msg_Err( p_demux, "failed syncing new frame" );
1498             return NULL;
1499         }
1500     }
1501
1502     p_sys->i_frame_pos = sync.frame;
1503     p_frame = p_sys->p_video_mmap + p_sys->mjpeg_buffers.size * sync.frame;
1504
1505     /* p_frame now points to the data.  fix up the Quicktime APP1 marker */
1506     tag = 0xffd9;
1507     tag = hton16( tag );
1508     p_field = p_frame;
1509
1510     /* look for EOI */
1511     p = memmem( p_field, sync.length, &tag, 2 );
1512
1513     if( p )
1514     {
1515         p += 2; /* data immediately following EOI */
1516         /* UNALIGNED! */
1517         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1518
1519         i_size = ((uint32_t)(p - p_field));
1520         i_size = hton32( i_size );
1521         memcpy( &p_app1->i_field_size, &i_size, 4 );
1522
1523         while( *p == 0xff && *(p+1) == 0xff )
1524             p++;
1525
1526         i_size = ((uint32_t)(p - p_field));
1527         i_size = hton32( i_size );
1528         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1529     }
1530
1531     tag = 0xffd8;
1532     tag = hton16( tag );
1533     p_field = memmem( p, sync.length - (size_t)(p - p_frame), &tag, 2 );
1534
1535     if( p_field )
1536     {
1537         i_size = (uint32_t)(p_field - p_frame);
1538         i_size = hton32( i_size );
1539         memcpy( &p_app1->i_next_field, &i_size, 4 );
1540
1541         /* UNALIGNED! */
1542         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1543         tag = 0xffd9;
1544         tag = hton16( tag );
1545         p = memmem( p_field, sync.length - (size_t)(p_field - p_frame),
1546                 &tag, 2 );
1547
1548         if( !p )
1549         {
1550             /* sometimes the second field doesn't have the EOI.  just put it
1551              * there
1552              */
1553             p = p_frame + sync.length;
1554             memcpy( p, &tag, 2 );
1555             sync.length += 2;
1556         }
1557
1558         p += 2;
1559         i_size = (uint32_t)(p - p_field);
1560         i_size = hton32( i_size );
1561         memcpy( &p_app1->i_field_size, &i_size, 4 );
1562         i_size = (uint32_t)(sync.length - (uint32_t)(p_field - p_frame));
1563         i_size = hton32( i_size );
1564         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1565     }
1566
1567     p_sys->i_video_frame_size = sync.length;
1568     return p_frame;
1569 }
1570
1571 static block_t *GrabVideo( demux_t *p_demux )
1572 {
1573     demux_sys_t *p_sys = p_demux->p_sys;
1574     uint8_t     *p_frame;
1575     block_t     *p_block;
1576
1577     if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1578     {
1579         mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1580
1581         /* Did we wait long enough ? (frame rate reduction) */
1582         if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1583     }
1584
1585     if( p_sys->b_mjpeg ) p_frame = GrabMJPEG( p_demux );
1586     else p_frame = GrabCapture( p_demux );
1587
1588     if( !p_frame ) return 0;
1589
1590     if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
1591     {
1592         msg_Warn( p_demux, "cannot get block" );
1593         return 0;
1594     }
1595
1596     memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
1597     p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1598
1599     return p_block;
1600 }