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
  31 #include <vlc/vlc.h>
  32 #include <vlc_input.h>
  33 #include <vlc_demux.h>
  34 #include <vlc_access.h>
  35 #include <vlc_vout.h>
  36 #include <vlc_codecs.h>
  37
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <sys/ioctl.h>
  41 #include <unistd.h>
  42 #include <sys/mman.h>
  43 #include <errno.h>
  44 #include <fcntl.h>
  45
  46 /* From GStreamer's v4l plugin:
  47  * Because of some really cool feature in video4linux1, also known as
  48  * 'not including sys/types.h and sys/time.h', we had to include it
  49  * ourselves. In all their intelligence, these people decided to fix
  50  * this in the next version (video4linux2) in such a cool way that it
  51  * breaks all compilations of old stuff...
  52  * The real problem is actually that linux/time.h doesn't use proper
  53  * macro checks before defining types like struct timeval. The proper
  54  * fix here is to either fuck the kernel header (which is what we do
  55  * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
  56  * upstream, which I'll consider doing later on. If you get compiler
  57  * errors here, check your linux/time.h && sys/time.h header setup.
  58 */
  59 #define _LINUX_TIME_H
  60
  61 #include <linux/videodev.h>
  62 #include "videodev_mjpeg.h"
  63
  64 #include <sys/soundcard.h>
  65
  66 /*****************************************************************************
  67  * Module descriptior
  68  *****************************************************************************/
  69 static int  Open ( vlc_object_t * );
  70 static void Close( vlc_object_t * );
  71
  72 #define CACHING_TEXT N_("Caching value in ms")
  73 #define CACHING_LONGTEXT N_( \
  74     "Caching value for V4L captures. This " \
  75     "value should be set in milliseconds." )
  76 #define VDEV_TEXT N_("Video device name")
  77 #define VDEV_LONGTEXT N_( \
  78     "Name of the video device to use. " \
  79     "If you don't specify anything, no video device will be used.")
  80 #define ADEV_TEXT N_("Audio device name")
  81 #define ADEV_LONGTEXT N_( \
  82     "Name of the audio device to use. " \
  83     "If you don't specify anything, no audio device will be used.")
  84 #define CHROMA_TEXT N_("Video input chroma format")
  85 #define CHROMA_LONGTEXT N_( \
  86     "Force the Video4Linux video device to use a specific chroma format " \
  87     "(eg. I420 (default), RV24, etc.)")
  88 #define FREQUENCY_TEXT N_( "Frequency" )
  89 #define FREQUENCY_LONGTEXT N_( \
  90     "Frequency to capture (in kHz), if applicable." )
  91 #define CHANNEL_TEXT N_( "Channel" )
  92 #define CHANNEL_LONGTEXT N_( \
  93     "Channel of the card to use (Usually, 0 = tuner, " \
  94     "1 = composite, 2 = svideo)." )
  95 #define NORM_TEXT N_( "Norm" )
  96 #define NORM_LONGTEXT N_( \
  97     "Norm of the stream (Automatic, SECAM, PAL, or NTSC)." )
  98 #define AUDIO_TEXT N_( "Audio Channel" )
  99 #define AUDIO_LONGTEXT N_( \
 100     "Audio Channel to use, if there are several audio inputs." )
 101 #define WIDTH_TEXT N_( "Width" )
 102 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
 103     "(-1 for autodetect)." )
 104 #define HEIGHT_TEXT N_( "Height" )
 105 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
 106     "(-1 for autodetect)." )
 107 #define BRIGHTNESS_TEXT N_( "Brightness" )
 108 #define BRIGHTNESS_LONGTEXT N_( \
 109     "Brightness of the video input." )
 110 #define HUE_TEXT N_( "Hue" )
 111 #define HUE_LONGTEXT N_( \
 112     "Hue of the video input." )
 113 #define COLOUR_TEXT N_( "Color" )
 114 #define COLOUR_LONGTEXT N_( \
 115     "Color of the video input." )
 116 #define CONTRAST_TEXT N_( "Contrast" )
 117 #define CONTRAST_LONGTEXT N_( \
 118     "Contrast of the video input." )
 119 #define TUNER_TEXT N_( "Tuner" )
 120 #define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones." )
 121 #define SAMPLERATE_TEXT N_( "Samplerate" )
 122 #define SAMPLERATE_LONGTEXT N_( \
 123     "Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100)" )
 124 #define STEREO_TEXT N_( "Stereo" )
 125 #define STEREO_LONGTEXT N_( \
 126     "Capture the audio stream in stereo." )
 127 #define MJPEG_TEXT N_( "MJPEG" )
 128 #define MJPEG_LONGTEXT N_(  \
 129     "Set this option if the capture device outputs MJPEG" )
 130 #define DECIMATION_TEXT N_( "Decimation" )
 131 #define DECIMATION_LONGTEXT N_( \
 132     "Decimation level for MJPEG streams" )
 133 #define QUALITY_TEXT N_( "Quality" )
 134 #define QUALITY_LONGTEXT N_( "Quality of the stream." )
 135 #define FPS_TEXT N_( "Framerate" )
 136 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
 137     "(-1 for autodetect)." )
 138
 139 static int i_norm_list[] =
 140     { VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
 141 static const char *psz_norm_list_text[] =
 142     { N_("Automatic"), N_("SECAM"), N_("PAL"),  N_("NTSC") };
 143
 144 vlc_module_begin();
 145     set_shortname( _("Video4Linux") );
 146     set_description( _("Video4Linux input") );
 147     set_category( CAT_INPUT );
 148     set_subcategory( SUBCAT_INPUT_ACCESS );
 149
 150     add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
 151                  CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
 152         change_safe();
 153     add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
 154                 VLC_FALSE );
 155         change_safe();
 156     add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
 157                 VLC_FALSE );
 158         change_safe();
 159     add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 160                 VLC_TRUE );
 161         change_safe();
 162     add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
 163         change_safe();
 164     add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
 165                 SAMPLERATE_LONGTEXT, VLC_TRUE );
 166         change_safe();
 167     add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
 168                 VLC_TRUE );
 169         change_safe();
 170     add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, VLC_TRUE );
 171         change_safe();
 172     add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
 173                 VLC_FALSE );
 174         change_safe();
 175         change_integer_list( i_norm_list, psz_norm_list_text, 0 );
 176     add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
 177                 VLC_FALSE );
 178         change_safe();
 179     add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, VLC_TRUE );
 180         change_safe();
 181     add_bool( "v4l-stereo", VLC_TRUE, NULL, STEREO_TEXT, STEREO_LONGTEXT,
 182             VLC_TRUE );
 183         change_safe();
 184     add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, VLC_TRUE );
 185         change_safe();
 186     add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
 187                 VLC_TRUE );
 188         change_safe();
 189     add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
 190                 BRIGHTNESS_LONGTEXT, VLC_TRUE );
 191         change_safe();
 192     add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
 193                 VLC_TRUE );
 194         change_safe();
 195     add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, VLC_TRUE );
 196         change_safe();
 197     add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
 198                 VLC_TRUE );
 199         change_safe();
 200     add_bool( "v4l-mjpeg", VLC_FALSE, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
 201             VLC_TRUE );
 202         change_safe();
 203     add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
 204             DECIMATION_LONGTEXT, VLC_TRUE );
 205         change_safe();
 206     add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
 207             VLC_TRUE );
 208         change_safe();
 209
 210     add_shortcut( "v4l" );
 211     set_capability( "access_demux", 10 );
 212     set_callbacks( Open, Close );
 213 vlc_module_end();
 214
 215 /*****************************************************************************
 216  * Access: local prototypes
 217  *****************************************************************************/
 218 static int Demux  ( demux_t * );
 219 static int Control( demux_t *, int, va_list );
 220
 221 static void ParseMRL    ( demux_t * );
 222 static int  OpenVideoDev( demux_t *, char * );
 223 static int  OpenAudioDev( demux_t *, char * );
 224
 225 static block_t *GrabAudio( demux_t * );
 226 static block_t *GrabVideo( demux_t * );
 227
 228 #define MJPEG_BUFFER_SIZE (256*1024)
 229
 230 struct quicktime_mjpeg_app1
 231 {
 232     uint32_t    i_reserved;             /* set to 0 */
 233     uint32_t    i_tag;                  /* 'mjpg' */
 234     uint32_t    i_field_size;           /* offset following EOI */
 235     uint32_t    i_padded_field_size;    /* offset following EOI+pad */
 236     uint32_t    i_next_field;           /* offset to next field */
 237     uint32_t    i_DQT_offset;
 238     uint32_t    i_DHT_offset;
 239     uint32_t    i_SOF_offset;
 240     uint32_t    i_SOS_offset;
 241     uint32_t    i_data_offset;          /* following SOS marker data */
 242 };
 243
 244 static struct
 245 {
 246     int i_v4l;
 247     int i_fourcc;
 248
 249 } v4lchroma_to_fourcc[] =
 250 {
 251     { VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
 252     { VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
 253     { VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
 254     { VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
 255     { VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
 256     { VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
 257     { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
 258     { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
 259     { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
 260     { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
 261     { VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
 262     { VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
 263     { VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
 264     { VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
 265     { VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
 266     { VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
 267     { VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
 268     { 0, 0 }
 269 };
 270
 271 struct demux_sys_t
 272 {
 273     /* Devices */
 274     char *psz_device;         /* Main device from MRL, can be video or audio */
 275
 276     char *psz_vdev;
 277     int  fd_video;
 278
 279     char *psz_adev;
 280     int  fd_audio;
 281
 282     /* Video properties */
 283     picture_t pic;
 284
 285     int i_fourcc;
 286     int i_channel;
 287     int i_audio;
 288     int i_norm;
 289     int i_tuner;
 290     int i_frequency;
 291     int i_width;
 292     int i_height;
 293
 294     int i_brightness;
 295     int i_hue;
 296     int i_colour;
 297     int i_contrast;
 298
 299     float f_fps;            /* <= 0.0 mean to grab at full rate */
 300     mtime_t i_video_pts;    /* only used when f_fps > 0 */
 301
 302     vlc_bool_t b_mjpeg;
 303     int i_decimation;
 304     int i_quality;
 305
 306     struct video_capability vid_cap;
 307     struct video_mbuf       vid_mbuf;
 308     struct mjpeg_requestbuffers mjpeg_buffers;
 309
 310     uint8_t *p_video_mmap;
 311     int     i_frame_pos;
 312
 313     struct video_mmap   vid_mmap;
 314     struct video_picture vid_picture;
 315
 316     int          i_video_frame_size;
 317     es_out_id_t  *p_es_video;
 318
 319     /* Audio properties */
 320     vlc_fourcc_t i_acodec_raw;
 321     int          i_sample_rate;
 322     vlc_bool_t   b_stereo;
 323     int          i_audio_max_frame_size;
 324     block_t      *p_block_audio;
 325     es_out_id_t  *p_es_audio;
 326 };
 327
 328 /*****************************************************************************
 329  * Open: opens v4l device
 330  *****************************************************************************
 331  *
 332  * url: <video device>::::
 333  *
 334  *****************************************************************************/
 335 static int Open( vlc_object_t *p_this )
 336 {
 337     demux_t     *p_demux = (demux_t*)p_this;
 338     demux_sys_t *p_sys;
 339     vlc_value_t val;
 340
 341     /* Only when selected */
 342     if( *p_demux->psz_access == '\0' )
 343         return VLC_EGENERIC;
 344
 345     /* Set up p_demux */
 346     p_demux->pf_demux = Demux;
 347     p_demux->pf_control = Control;
 348     p_demux->info.i_update = 0;
 349     p_demux->info.i_title = 0;
 350     p_demux->info.i_seekpoint = 0;
 351     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 352     memset( p_sys, 0, sizeof( demux_sys_t ) );
 353
 354     var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 355     var_Get( p_demux, "v4l-audio", &val );
 356     p_sys->i_audio          = val.i_int;
 357
 358     var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 359     var_Get( p_demux, "v4l-channel", &val );
 360     p_sys->i_channel        = val.i_int;
 361
 362     var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 363     var_Get( p_demux, "v4l-norm", &val );
 364     p_sys->i_norm           = val.i_int;
 365
 366     var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 367     var_Get( p_demux, "v4l-tuner", &val );
 368     p_sys->i_tuner          = val.i_int;
 369
 370     var_Create( p_demux, "v4l-frequency",
 371                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 372     var_Get( p_demux, "v4l-frequency", &val );
 373     p_sys->i_frequency      = val.i_int;
 374
 375     var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 376     var_Get( p_demux, "v4l-fps", &val );
 377     p_sys->f_fps            = val.f_float;
 378
 379     var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 380     var_Get( p_demux, "v4l-width", &val );
 381     p_sys->i_width          = val.i_int;
 382
 383     var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 384     var_Get( p_demux, "v4l-height", &val );
 385     p_sys->i_height         = val.i_int;
 386
 387     p_sys->i_video_pts      = -1;
 388
 389     var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
 390                                                         VLC_VAR_DOINHERIT );
 391     var_Get( p_demux, "v4l-brightness", &val );
 392     p_sys->i_brightness     = val.i_int;
 393
 394     var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 395     var_Get( p_demux, "v4l-hue", &val );
 396     p_sys->i_hue            = -1;
 397
 398     var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 399     var_Get( p_demux, "v4l-colour", &val );
 400     p_sys->i_colour         = val.i_int;
 401
 402     var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 403     var_Get( p_demux, "v4l-contrast", &val );
 404     p_sys->i_contrast       = val.i_int;
 405
 406     var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 407     var_Get( p_demux, "v4l-mjpeg", &val );
 408     p_sys->b_mjpeg     = val.b_bool;
 409
 410     var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
 411                                                             VLC_VAR_DOINHERIT );
 412     var_Get( p_demux, "v4l-decimation", &val );
 413     p_sys->i_decimation = val.i_int;
 414
 415     var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 416     var_Get( p_demux, "v4l-quality", &val );
 417     p_sys->i_quality = val.i_int;
 418
 419     var_Create( p_demux, "v4l-samplerate",
 420                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 421     var_Get( p_demux, "v4l-samplerate", &val );
 422     p_sys->i_sample_rate  = val.i_int;
 423
 424     var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 425     var_Get( p_demux, "v4l-stereo", &val );
 426     p_sys->b_stereo       = val.b_bool;
 427
 428     p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
 429     p_sys->fd_video = -1;
 430     p_sys->fd_audio = -1;
 431
 432     p_sys->p_es_video = p_sys->p_es_audio = 0;
 433     p_sys->p_block_audio = 0;
 434
 435     ParseMRL( p_demux );
 436
 437     /* Find main device (video or audio) */
 438     if( p_sys->psz_device && *p_sys->psz_device )
 439     {
 440         msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
 441
 442         /* Try to open as video device */
 443         p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
 444
 445         if( p_sys->fd_video < 0 )
 446         {
 447             /* Try to open as audio device */
 448             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
 449             if( p_sys->fd_audio >= 0 )
 450             {
 451                 if( p_sys->psz_adev ) free( p_sys->psz_adev );
 452                 p_sys->psz_adev = p_sys->psz_device;
 453                 p_sys->psz_device = NULL;
 454             }
 455         }
 456         else
 457         {
 458             if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
 459             p_sys->psz_vdev = p_sys->psz_device;
 460             p_sys->psz_device = NULL;
 461         }
 462     }
 463
 464     /* If no device opened, only continue if the access was forced */
 465     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 466     {
 467         if( strcmp( p_demux->psz_access, "v4l" ) )
 468         {
 469             Close( p_this );
 470             return VLC_EGENERIC;
 471         }
 472     }
 473
 474     /* Find video device */
 475     if( p_sys->fd_video < 0 )
 476     {
 477         if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
 478         {
 479             if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
 480             p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
 481         }
 482
 483         if( p_sys->psz_vdev && *p_sys->psz_vdev )
 484         {
 485             p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
 486         }
 487     }
 488
 489     /* Find audio device */
 490     if( p_sys->fd_audio < 0 )
 491     {
 492         if( !p_sys->psz_adev || !*p_sys->psz_adev )
 493         {
 494             if( p_sys->psz_adev ) free( p_sys->psz_adev );
 495             p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
 496         }
 497
 498         if( p_sys->psz_adev && *p_sys->psz_adev )
 499         {
 500             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
 501         }
 502     }
 503
 504     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 505     {
 506         Close( p_this );
 507         return VLC_EGENERIC;
 508     }
 509
 510     msg_Dbg( p_demux, "v4l grabbing started" );
 511
 512     /* Declare elementary streams */
 513     if( p_sys->fd_video >= 0 )
 514     {
 515         es_format_t fmt;
 516         es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
 517         fmt.video.i_width  = p_sys->i_width;
 518         fmt.video.i_height = p_sys->i_height;
 519         fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
 520
 521         /* Setup rgb mask for RGB formats */
 522         if( p_sys->i_fourcc == VLC_FOURCC('R','V','2','4') )
 523         {
 524             /* This is in BGR format */
 525             fmt.video.i_bmask = 0x00ff0000;
 526             fmt.video.i_gmask = 0x0000ff00;
 527             fmt.video.i_rmask = 0x000000ff;
 528         }
 529
 530         msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
 531                  (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
 532         p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
 533     }
 534
 535     if( p_sys->fd_audio >= 0 )
 536     {
 537         es_format_t fmt;
 538         es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
 539
 540         fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
 541         fmt.audio.i_rate = p_sys->i_sample_rate;
 542         fmt.audio.i_bitspersample = 16; // FIXME ?
 543         fmt.audio.i_blockalign = fmt.audio.i_channels *
 544             fmt.audio.i_bitspersample / 8;
 545         fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
 546             fmt.audio.i_bitspersample;
 547
 548         msg_Dbg( p_demux, "new audio es %d channels %dHz",
 549                  fmt.audio.i_channels, fmt.audio.i_rate );
 550
 551         p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
 552     }
 553
 554     /* Update default_pts to a suitable value for access */
 555     var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 556
 557     return VLC_SUCCESS;
 558 }
 559
 560 /*****************************************************************************
 561  * Close: close device, free resources
 562  *****************************************************************************/
 563 static void Close( vlc_object_t *p_this )
 564 {
 565     demux_t     *p_demux = (demux_t *)p_this;
 566     demux_sys_t *p_sys   = p_demux->p_sys;
 567
 568     if( p_sys->psz_device ) free( p_sys->psz_device );
 569     if( p_sys->psz_vdev )   free( p_sys->psz_vdev );
 570     if( p_sys->psz_adev )   free( p_sys->psz_adev );
 571     if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
 572     if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
 573     if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
 574
 575     if( p_sys->b_mjpeg )
 576     {
 577         int i_noframe = -1;
 578         ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
 579     }
 580
 581     if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
 582     {
 583         if( p_sys->b_mjpeg )
 584             munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
 585                     p_sys->mjpeg_buffers.count );
 586         else
 587             munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
 588     }
 589
 590     free( p_sys );
 591 }
 592
 593 /*****************************************************************************
 594  * Control:
 595  *****************************************************************************/
 596 static int Control( demux_t *p_demux, int i_query, va_list args )
 597 {
 598     vlc_bool_t *pb;
 599     int64_t    *pi64;
 600
 601     switch( i_query )
 602     {
 603         /* Special for access_demux */
 604         case DEMUX_CAN_PAUSE:
 605         case DEMUX_CAN_SEEK:
 606         case DEMUX_SET_PAUSE_STATE:
 607         case DEMUX_CAN_CONTROL_PACE:
 608             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 609             *pb = VLC_FALSE;
 610             return VLC_SUCCESS;
 611
 612         case DEMUX_GET_PTS_DELAY:
 613             pi64 = (int64_t*)va_arg( args, int64_t * );
 614             *pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
 615             return VLC_SUCCESS;
 616
 617         case DEMUX_GET_TIME:
 618             pi64 = (int64_t*)va_arg( args, int64_t * );
 619             *pi64 = mdate();
 620             return VLC_SUCCESS;
 621
 622         /* TODO implement others */
 623         default:
 624             return VLC_EGENERIC;
 625     }
 626
 627     return VLC_EGENERIC;
 628 }
 629
 630 /*****************************************************************************
 631  * Demux:
 632  *****************************************************************************/
 633 static int Demux( demux_t *p_demux )
 634 {
 635     demux_sys_t *p_sys = p_demux->p_sys;
 636     es_out_id_t  *p_es = p_sys->p_es_audio;
 637     block_t *p_block = NULL;
 638
 639     /* Try grabbing audio frames first */
 640     if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
 641     {
 642         /* Try grabbing video frame */
 643         p_es = p_sys->p_es_video;
 644         if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
 645     }
 646
 647     if( !p_block )
 648     {
 649         /* Sleep so we do not consume all the cpu, 10ms seems
 650          * like a good value (100fps) */
 651         msleep( 10000 );
 652         return 1;
 653     }
 654
 655     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
 656     es_out_Send( p_demux->out, p_es, p_block );
 657
 658     return 1;
 659 }
 660
 661 /*****************************************************************************
 662  * ParseMRL: parse the options contained in the MRL
 663  *****************************************************************************/
 664 static void ParseMRL( demux_t *p_demux )
 665 {
 666     demux_sys_t *p_sys = p_demux->p_sys;
 667
 668     char *psz_dup = strdup( p_demux->psz_path );
 669     char *psz_parser = psz_dup;
 670
 671     while( *psz_parser && *psz_parser != ':' )
 672     {
 673         psz_parser++;
 674     }
 675
 676     if( *psz_parser == ':' )
 677     {
 678         /* read options */
 679         for( ;; )
 680         {
 681             *psz_parser++ = '\0';
 682             if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
 683             {
 684                 p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
 685                                            &psz_parser, 0 );
 686             }
 687             else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
 688             {
 689                 psz_parser += strlen( "norm=" );
 690                 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
 691                 {
 692                     p_sys->i_norm = VIDEO_MODE_PAL;
 693                     psz_parser += strlen( "pal" );
 694                 }
 695                 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
 696                 {
 697                     p_sys->i_norm = VIDEO_MODE_NTSC;
 698                     psz_parser += strlen( "ntsc" );
 699                 }
 700                 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
 701                 {
 702                     p_sys->i_norm = VIDEO_MODE_SECAM;
 703                     psz_parser += strlen( "secam" );
 704                 }
 705                 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
 706                 {
 707                     p_sys->i_norm = VIDEO_MODE_AUTO;
 708                     psz_parser += strlen( "auto" );
 709                 }
 710                 else
 711                 {
 712                     p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
 713                 }
 714             }
 715             else if( !strncmp( psz_parser, "frequency=",
 716                                strlen( "frequency=" ) ) )
 717             {
 718                 p_sys->i_frequency =
 719                     strtol( psz_parser + strlen( "frequency=" ),
 720                             &psz_parser, 0 );
 721                 if( p_sys->i_frequency < 30000 )
 722                 {
 723                     msg_Warn( p_demux, "v4l syntax has changed : "
 724                               "'frequency' is now channel frequency in kHz");
 725                 }
 726             }
 727             else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
 728             {
 729                 p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
 730                                          &psz_parser, 0 );
 731             }
 732             else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
 733             {
 734                 psz_parser += strlen( "size=" );
 735                 if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
 736                 {
 737                     p_sys->i_width  = 128;
 738                     p_sys->i_height = 96;
 739                 }
 740                 else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
 741                 {
 742                     p_sys->i_width  = 160;
 743                     p_sys->i_height = 120;
 744                 }
 745                 else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
 746                 {
 747                     p_sys->i_width  = 176;
 748                     p_sys->i_height = 144;
 749                 }
 750                 else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
 751                 {
 752                     p_sys->i_width  = 320;
 753                     p_sys->i_height = 244;
 754                 }
 755                 else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
 756                 {
 757                     p_sys->i_width  = 352;
 758                     p_sys->i_height = 288;
 759                 }
 760                 else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
 761                 {
 762                     p_sys->i_width  = 640;
 763                     p_sys->i_height = 480;
 764                 }
 765                 else
 766                 {
 767                     /* widthxheight */
 768                     p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
 769                     if( *psz_parser == 'x' || *psz_parser == 'X')
 770                     {
 771                         p_sys->i_height = strtol( psz_parser + 1,
 772                                                   &psz_parser, 0 );
 773                     }
 774                     msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
 775                              p_sys->i_height );
 776                 }
 777             }
 778             else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
 779             {
 780                 p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
 781                                               &psz_parser, 0 );
 782             }
 783             else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
 784             {
 785                 p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
 786                                           &psz_parser, 0 );
 787             }
 788             else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
 789             {
 790                 p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
 791                                        &psz_parser, 0 );
 792             }
 793             else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
 794             {
 795                 p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
 796                                             &psz_parser, 0 );
 797             }
 798             else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
 799             {
 800                 p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
 801                                          &psz_parser, 0 );
 802             }
 803             else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
 804             {
 805                 int  i_len;
 806
 807                 psz_parser += strlen( "adev=" );
 808                 if( strchr( psz_parser, ':' ) )
 809                 {
 810                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 811                 }
 812                 else
 813                 {
 814                     i_len = strlen( psz_parser );
 815                 }
 816
 817                 p_sys->psz_adev = strndup( psz_parser, i_len );
 818
 819                 psz_parser += i_len;
 820             }
 821             else if( !strncmp( psz_parser, "samplerate=",
 822                                strlen( "samplerate=" ) ) )
 823             {
 824                 p_sys->i_sample_rate =
 825                     strtol( psz_parser + strlen( "samplerate=" ),
 826                             &psz_parser, 0 );
 827             }
 828             else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
 829             {
 830                 psz_parser += strlen( "stereo" );
 831
 832                 p_sys->b_stereo = VLC_TRUE;
 833             }
 834             else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
 835             {
 836                 psz_parser += strlen( "mono" );
 837
 838                 p_sys->b_stereo = VLC_FALSE;
 839             }
 840             else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
 841             {
 842                 psz_parser += strlen( "mjpeg" );
 843
 844                 p_sys->b_mjpeg = VLC_TRUE;
 845             }
 846             else if( !strncmp( psz_parser, "decimation=",
 847                         strlen( "decimation=" ) ) )
 848             {
 849                 p_sys->i_decimation =
 850                     strtol( psz_parser + strlen( "decimation=" ),
 851                             &psz_parser, 0 );
 852             }
 853             else if( !strncmp( psz_parser, "quality=",
 854                         strlen( "quality=" ) ) )
 855             {
 856                 p_sys->i_quality =
 857                     strtol( psz_parser + strlen( "quality=" ),
 858                             &psz_parser, 0 );
 859             }
 860             else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
 861             {
 862                 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
 863                                        &psz_parser );
 864             }
 865             else
 866             {
 867                 msg_Warn( p_demux, "unknown option" );
 868             }
 869
 870             while( *psz_parser && *psz_parser != ':' )
 871             {
 872                 psz_parser++;
 873             }
 874
 875             if( *psz_parser == '\0' )
 876             {
 877                 break;
 878             }
 879         }
 880     }
 881
 882     if( *psz_dup )
 883     {
 884         p_sys->psz_device = strdup( psz_dup );
 885     }
 886     if( psz_dup ) free( psz_dup );
 887 }
 888
 889 /*****************************************************************************
 890  * OpenVideoDev:
 891  *****************************************************************************/
 892 static int OpenVideoDev( demux_t *p_demux, char *psz_device )
 893 {
 894     demux_sys_t *p_sys = p_demux->p_sys;
 895     int i_fd;
 896
 897     struct video_channel vid_channel;
 898     struct mjpeg_params mjpeg;
 899     int i;
 900
 901     if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
 902     {
 903         msg_Err( p_demux, "cannot open device (%m)" );
 904         goto vdev_failed;
 905     }
 906
 907     if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
 908     {
 909         msg_Err( p_demux, "cannot get capabilities (%m)" );
 910         goto vdev_failed;
 911     }
 912
 913     msg_Dbg( p_demux,
 914              "V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
 915              p_sys->vid_cap.name,
 916              p_sys->vid_cap.channels,
 917              p_sys->vid_cap.audios,
 918              p_sys->vid_cap.minwidth,  p_sys->vid_cap.maxwidth,
 919              p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
 920
 921     if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
 922     {
 923         msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
 924         p_sys->i_channel = 0;
 925     }
 926     if( p_sys->vid_cap.audios && p_sys->i_audio >= p_sys->vid_cap.audios )
 927     {
 928         msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
 929         p_sys->i_audio = -1;
 930     }
 931
 932     if( p_sys->i_width < p_sys->vid_cap.minwidth ||
 933         p_sys->i_width > p_sys->vid_cap.maxwidth )
 934     {
 935         msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
 936         p_sys->i_width = 0;
 937     }
 938     if( p_sys->i_height < p_sys->vid_cap.minheight ||
 939         p_sys->i_height > p_sys->vid_cap.maxheight )
 940     {
 941         msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
 942         p_sys->i_height = 0;
 943     }
 944
 945     if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
 946     {
 947         msg_Err( p_demux, "cannot grab" );
 948         goto vdev_failed;
 949     }
 950
 951     vid_channel.channel = p_sys->i_channel;
 952     if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
 953     {
 954         msg_Err( p_demux, "cannot get channel infos (%m)" );
 955         goto vdev_failed;
 956     }
 957     msg_Dbg( p_demux,
 958              "setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
 959              vid_channel.name, vid_channel.channel, vid_channel.tuners,
 960              vid_channel.flags, vid_channel.type, vid_channel.norm );
 961
 962     if( p_sys->i_tuner >= vid_channel.tuners )
 963     {
 964         msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
 965         p_sys->i_tuner = 0;
 966     }
 967
 968     vid_channel.norm = p_sys->i_norm;
 969     if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
 970     {
 971         msg_Err( p_demux, "cannot set channel (%m)" );
 972         goto vdev_failed;
 973     }
 974
 975     if( vid_channel.flags & VIDEO_VC_TUNER )
 976     {
 977
 978         /* set tuner */
 979 #if 0
 980         struct video_tuner vid_tuner;
 981         if( p_sys->i_tuner >= 0 )
 982         {
 983             vid_tuner.tuner = p_sys->i_tuner;
 984             if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
 985             {
 986                 msg_Err( p_demux, "cannot get tuner (%m)" );
 987                 goto vdev_failed;
 988             }
 989             msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
 990                      "mode=0x%x signal=0x%x",
 991                      vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
 992                      vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
 993
 994             msg_Dbg( p_demux, "setting tuner %s (%d)",
 995                      vid_tuner.name, vid_tuner.tuner );
 996
 997             /* FIXME FIXME to be checked FIXME FIXME */
 998             //vid_tuner.mode = p_sys->i_norm;
 999             if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
1000             {
1001                 msg_Err( p_demux, "cannot set tuner (%m)" );
1002                 goto vdev_failed;
1003             }
1004         }
1005 #endif
1006
1007         /* Show a warning if frequency is < than 30000.
1008          * User is certainly usint old syntax. */
1009
1010
1011         /* set frequency */
1012         if( p_sys->i_frequency >= 0 )
1013         {
1014             int driver_frequency = p_sys->i_frequency * 16 /1000;
1015             if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
1016             {
1017                 msg_Err( p_demux, "cannot set frequency (%m)" );
1018                 goto vdev_failed;
1019             }
1020             msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1021                                                    driver_frequency );
1022         }
1023     }
1024
1025     /* set audio */
1026     if( vid_channel.flags & VIDEO_VC_AUDIO )
1027     {
1028         struct video_audio      vid_audio;
1029
1030         /* XXX TODO volume, balance, ... */
1031         if( p_sys->i_audio >= 0 )
1032         {
1033             vid_audio.audio = p_sys->i_audio;
1034             if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1035             {
1036                 msg_Err( p_demux, "cannot get audio (%m)" );
1037                 goto vdev_failed;
1038             }
1039
1040             /* unmute audio */
1041             vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1042
1043             if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1044             {
1045                 msg_Err( p_demux, "cannot set audio (%m)" );
1046                 goto vdev_failed;
1047             }
1048         }
1049
1050     }
1051
1052     /* establish basic params with input and norm before feeling width
1053      * or height */
1054     if( p_sys->b_mjpeg )
1055     {
1056         struct quicktime_mjpeg_app1 *p_app1;
1057         int32_t i_offset;
1058
1059         if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1060         {
1061             msg_Err( p_demux, "cannot get mjpeg params (%m)" );
1062             goto vdev_failed;
1063         }
1064         mjpeg.input = p_sys->i_channel;
1065         mjpeg.norm  = p_sys->i_norm;
1066         mjpeg.decimation = p_sys->i_decimation;
1067
1068         if( p_sys->i_width )
1069             mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1070         if( p_sys->i_height )
1071             mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1072
1073         /* establish Quicktime APP1 marker while we are here */
1074         mjpeg.APPn = 1;
1075         mjpeg.APP_len = 40;
1076
1077         /* aligned */
1078         p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1079         p_app1->i_reserved = 0;
1080         p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1081         p_app1->i_field_size = 0;
1082         p_app1->i_padded_field_size = 0;
1083         p_app1->i_next_field = 0;
1084         /* XXX WARNING XXX */
1085         /* these's nothing magic about these values.  We are dangerously
1086          * assuming the encoder card is encoding mjpeg-a and is not throwing
1087          * in marker tags we aren't expecting.  It's bad enough we have to
1088          * search through the jpeg output for every frame we grab just to
1089          * find the first field's end marker, so we take this risk to boost
1090          * performance.
1091          * This is really something the driver could do for us because this
1092          * does conform to standards outside of Apple Quicktime.
1093          */
1094         i_offset = 0x2e;
1095         p_app1->i_DQT_offset = hton32( i_offset );
1096         i_offset = 0xb4;
1097         p_app1->i_DHT_offset = hton32( i_offset );
1098         i_offset = 0x258;
1099         p_app1->i_SOF_offset = hton32( i_offset );
1100         i_offset = 0x26b;
1101         p_app1->i_SOS_offset = hton32( i_offset );
1102         i_offset = 0x279;
1103         p_app1->i_data_offset = hton32( i_offset );
1104
1105         /* SOF and SOS aren't specified by the mjpeg API because they aren't
1106          * optional.  They will be present in the output. */
1107         mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1108
1109         if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1110         {
1111             msg_Err( p_demux, "cannot set mjpeg params (%m)" );
1112             goto vdev_failed;
1113         }
1114
1115         p_sys->i_width = mjpeg.img_width * mjpeg.HorDcm;
1116         p_sys->i_height = mjpeg.img_height * mjpeg.VerDcm *
1117             mjpeg.field_per_buff;
1118     }
1119
1120     /* fix width/height */
1121     if( !p_sys->b_mjpeg && ( p_sys->i_width == 0 || p_sys->i_height == 0 ) )
1122     {
1123         struct video_window vid_win;
1124
1125         if( ioctl( i_fd, VIDIOCGWIN, &vid_win ) < 0 )
1126         {
1127             msg_Err( p_demux, "cannot get win (%m)" );
1128             goto vdev_failed;
1129         }
1130         p_sys->i_width  = vid_win.width;
1131         p_sys->i_height = vid_win.height;
1132
1133         if( !p_sys->i_width || !p_sys->i_height )
1134         {
1135             p_sys->i_width = p_sys->vid_cap.maxwidth;
1136             p_sys->i_height = p_sys->vid_cap.maxheight;
1137         }
1138
1139         if( !p_sys->i_width || !p_sys->i_height )
1140         {
1141             msg_Err( p_demux, "invalid video size (%ix%i)",
1142                      p_sys->i_width, p_sys->i_height );
1143             goto vdev_failed;
1144         }
1145
1146         msg_Dbg( p_demux, "will use %dx%d", p_sys->i_width, p_sys->i_height );
1147     }
1148
1149     if( !p_sys->b_mjpeg )
1150     {
1151         /* set hue/color/.. */
1152         if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1153         {
1154             struct video_picture vid_picture = p_sys->vid_picture;
1155
1156             if( p_sys->i_brightness >= 0 && p_sys->i_brightness < 65536 )
1157             {
1158                 vid_picture.brightness = p_sys->i_brightness;
1159             }
1160             if( p_sys->i_colour >= 0 && p_sys->i_colour < 65536 )
1161             {
1162                 vid_picture.colour = p_sys->i_colour;
1163             }
1164             if( p_sys->i_hue >= 0 && p_sys->i_hue < 65536 )
1165             {
1166                 vid_picture.hue = p_sys->i_hue;
1167             }
1168             if( p_sys->i_contrast  >= 0 && p_sys->i_contrast < 65536 )
1169             {
1170                 vid_picture.contrast = p_sys->i_contrast;
1171             }
1172             if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1173             {
1174                 msg_Dbg( p_demux, "v4l device uses brightness: %d",
1175                          vid_picture.brightness );
1176                 msg_Dbg( p_demux, "v4l device uses colour: %d",
1177                          vid_picture.colour );
1178                 msg_Dbg( p_demux, "v4l device uses hue: %d", vid_picture.hue );
1179                 msg_Dbg( p_demux, "v4l device uses contrast: %d",
1180                          vid_picture.contrast );
1181                 p_sys->vid_picture = vid_picture;
1182             }
1183         }
1184
1185         /* Find out video format used by device */
1186         if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1187         {
1188             struct video_picture vid_picture = p_sys->vid_picture;
1189             char *psz;
1190             int i;
1191
1192             p_sys->i_fourcc = 0;
1193
1194             psz = var_CreateGetString( p_demux, "v4l-chroma" );
1195             if( strlen( psz ) >= 4 )
1196             {
1197                 vid_picture.palette = 0;
1198                 int i_chroma = VLC_FOURCC( psz[0], psz[1], psz[2], psz[3] );
1199
1200                 /* Find out v4l chroma code */
1201                 for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1202                 {
1203                     if( v4lchroma_to_fourcc[i].i_fourcc == i_chroma )
1204                     {
1205                         vid_picture.palette = v4lchroma_to_fourcc[i].i_v4l;
1206                         break;
1207                     }
1208                 }
1209             }
1210             free( psz );
1211
1212             if( vid_picture.palette &&
1213                 !ioctl( i_fd, VIDIOCSPICT, &vid_picture ) )
1214             {
1215                 p_sys->vid_picture = vid_picture;
1216             }
1217             else
1218             {
1219                 /* Try to set the format to something easy to encode */
1220                 vid_picture.palette = VIDEO_PALETTE_YUV420P;
1221                 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1222                 {
1223                     p_sys->vid_picture = vid_picture;
1224                 }
1225                 else
1226                 {
1227                     vid_picture.palette = VIDEO_PALETTE_YUV422P;
1228                     if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1229                     {
1230                         p_sys->vid_picture = vid_picture;
1231                     }
1232                 }
1233             }
1234
1235             /* Find out final format */
1236             for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1237             {
1238                 if( v4lchroma_to_fourcc[i].i_v4l == p_sys->vid_picture.palette)
1239                 {
1240                     p_sys->i_fourcc = v4lchroma_to_fourcc[i].i_fourcc;
1241                     break;
1242                 }
1243             }
1244         }
1245         else
1246         {
1247             msg_Err( p_demux, "ioctl VIDIOCGPICT failed" );
1248             goto vdev_failed;
1249         }
1250     }
1251
1252     if( p_sys->b_mjpeg )
1253     {
1254         int i;
1255
1256         p_sys->mjpeg_buffers.count = 8;
1257         p_sys->mjpeg_buffers.size = MJPEG_BUFFER_SIZE;
1258
1259         if( ioctl( i_fd, MJPIOC_REQBUFS, &p_sys->mjpeg_buffers ) < 0 )
1260         {
1261             msg_Err( p_demux, "mmap unsupported" );
1262             goto vdev_failed;
1263         }
1264
1265         p_sys->p_video_mmap = mmap( 0,
1266                 p_sys->mjpeg_buffers.size * p_sys->mjpeg_buffers.count,
1267                 PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, 0 );
1268         if( p_sys->p_video_mmap == MAP_FAILED )
1269         {
1270             msg_Err( p_demux, "mmap failed" );
1271             goto vdev_failed;
1272         }
1273
1274         p_sys->i_fourcc  = VLC_FOURCC( 'm','j','p','g' );
1275         p_sys->i_frame_pos = -1;
1276
1277         /* queue up all the frames */
1278         for( i = 0; i < (int)p_sys->mjpeg_buffers.count; i++ )
1279         {
1280             if( ioctl( i_fd, MJPIOC_QBUF_CAPT, &i ) < 0 )
1281             {
1282                 msg_Err( p_demux, "unable to queue frame" );
1283                 goto vdev_failed;
1284             }
1285         }
1286     }
1287     else
1288     {
1289         /* Fill in picture_t fields */
1290         vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic, p_sys->i_fourcc,
1291                           p_sys->i_width, p_sys->i_height, p_sys->i_width *
1292                           VOUT_ASPECT_FACTOR / p_sys->i_height );
1293         if( !p_sys->pic.i_planes )
1294         {
1295             msg_Err( p_demux, "unsupported chroma" );
1296             goto vdev_failed;
1297         }
1298         p_sys->i_video_frame_size = 0;
1299         for( i = 0; i < p_sys->pic.i_planes; i++ )
1300         {
1301             p_sys->i_video_frame_size += p_sys->pic.p[i].i_visible_lines *
1302               p_sys->pic.p[i].i_visible_pitch;
1303         }
1304
1305         msg_Dbg( p_demux, "v4l device uses frame size: %i",
1306                  p_sys->i_video_frame_size );
1307         msg_Dbg( p_demux, "v4l device uses chroma: %4.4s",
1308                 (char*)&p_sys->i_fourcc );
1309
1310         /* Allocate mmap buffer */
1311         if( ioctl( i_fd, VIDIOCGMBUF, &p_sys->vid_mbuf ) < 0 )
1312         {
1313             msg_Err( p_demux, "mmap unsupported" );
1314             goto vdev_failed;
1315         }
1316
1317         p_sys->p_video_mmap = mmap( 0, p_sys->vid_mbuf.size,
1318                                     PROT_READ|PROT_WRITE, MAP_SHARED,
1319                                     i_fd, 0 );
1320         if( p_sys->p_video_mmap == MAP_FAILED )
1321         {
1322             /* FIXME -> normal read */
1323             msg_Err( p_demux, "mmap failed" );
1324             goto vdev_failed;
1325         }
1326
1327         /* init grabbing */
1328         p_sys->vid_mmap.frame  = 0;
1329         p_sys->vid_mmap.width  = p_sys->i_width;
1330         p_sys->vid_mmap.height = p_sys->i_height;
1331         p_sys->vid_mmap.format = p_sys->vid_picture.palette;
1332         if( ioctl( i_fd, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1333         {
1334             msg_Warn( p_demux, "%4.4s refused", (char*)&p_sys->i_fourcc );
1335             msg_Err( p_demux, "chroma selection failed" );
1336             goto vdev_failed;
1337         }
1338     }
1339     return i_fd;
1340
1341 vdev_failed:
1342
1343     if( i_fd >= 0 ) close( i_fd );
1344     return -1;
1345 }
1346
1347 /*****************************************************************************
1348  * OpenAudioDev:
1349  *****************************************************************************/
1350 static int OpenAudioDev( demux_t *p_demux, char *psz_device )
1351 {
1352     demux_sys_t *p_sys = p_demux->p_sys;
1353     int i_fd, i_format;
1354
1355     if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
1356     {
1357         msg_Err( p_demux, "cannot open audio device (%m)" );
1358         goto adev_fail;
1359     }
1360
1361     i_format = AFMT_S16_LE;
1362     if( ioctl( i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
1363         || i_format != AFMT_S16_LE )
1364     {
1365         msg_Err( p_demux, "cannot set audio format (16b little endian) "
1366                  "(%m)" );
1367         goto adev_fail;
1368     }
1369
1370     if( ioctl( i_fd, SNDCTL_DSP_STEREO,
1371                &p_sys->b_stereo ) < 0 )
1372     {
1373         msg_Err( p_demux, "cannot set audio channels count (%m)" );
1374         goto adev_fail;
1375     }
1376
1377     if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1378                &p_sys->i_sample_rate ) < 0 )
1379     {
1380         msg_Err( p_demux, "cannot set audio sample rate (%m)" );
1381         goto adev_fail;
1382     }
1383
1384     msg_Dbg( p_demux, "opened adev=`%s' %s %dHz",
1385              psz_device, p_sys->b_stereo ? "stereo" : "mono",
1386              p_sys->i_sample_rate );
1387
1388     p_sys->i_audio_max_frame_size = 6 * 1024;
1389
1390     return i_fd;
1391
1392  adev_fail:
1393
1394     if( i_fd >= 0 ) close( i_fd );
1395     return -1;
1396 }
1397
1398 /*****************************************************************************
1399  * GrabAudio: grab audio
1400  *****************************************************************************/
1401 static block_t *GrabAudio( demux_t *p_demux )
1402 {
1403     demux_sys_t *p_sys = p_demux->p_sys;
1404     struct audio_buf_info buf_info;
1405     int i_read, i_correct;
1406     block_t *p_block;
1407
1408     if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
1409     else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
1410
1411     if( !p_block )
1412     {
1413         msg_Warn( p_demux, "cannot get block" );
1414         return 0;
1415     }
1416
1417     p_sys->p_block_audio = p_block;
1418
1419     i_read = read( p_sys->fd_audio, p_block->p_buffer,
1420                    p_sys->i_audio_max_frame_size );
1421
1422     if( i_read <= 0 ) return 0;
1423
1424     p_block->i_buffer = i_read;
1425     p_sys->p_block_audio = 0;
1426
1427     /* Correct the date because of kernel buffering */
1428     i_correct = i_read;
1429     if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
1430     {
1431         i_correct += buf_info.bytes;
1432     }
1433
1434     p_block->i_pts = p_block->i_dts =
1435         mdate() - I64C(1000000) * (mtime_t)i_correct /
1436         2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
1437
1438     return p_block;
1439 }
1440
1441 /*****************************************************************************
1442  * GrabVideo:
1443  *****************************************************************************/
1444 static uint8_t *GrabCapture( demux_t *p_demux )
1445 {
1446     demux_sys_t *p_sys = p_demux->p_sys;
1447     int i_captured_frame = p_sys->i_frame_pos;
1448
1449     p_sys->vid_mmap.frame = (p_sys->i_frame_pos + 1) % p_sys->vid_mbuf.frames;
1450
1451     while( ioctl( p_sys->fd_video, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1452     {
1453         if( errno != EAGAIN )
1454         {
1455             msg_Err( p_demux, "failed capturing new frame" );
1456             return NULL;
1457         }
1458
1459         if( p_demux->b_die )
1460         {
1461             return NULL;
1462         }
1463
1464         msg_Dbg( p_demux, "grab failed, trying again" );
1465     }
1466
1467     while( ioctl(p_sys->fd_video, VIDIOCSYNC, &p_sys->i_frame_pos) < 0 )
1468     {
1469         if( errno != EAGAIN && errno != EINTR )
1470         {
1471             msg_Err( p_demux, "failed syncing new frame" );
1472             return NULL;
1473         }
1474     }
1475
1476     p_sys->i_frame_pos = p_sys->vid_mmap.frame;
1477     /* leave i_video_frame_size alone */
1478     return p_sys->p_video_mmap + p_sys->vid_mbuf.offsets[i_captured_frame];
1479 }
1480
1481 static uint8_t *GrabMJPEG( demux_t *p_demux )
1482 {
1483     demux_sys_t *p_sys = p_demux->p_sys;
1484     struct mjpeg_sync sync;
1485     uint8_t *p_frame, *p_field, *p;
1486     uint16_t tag;
1487     uint32_t i_size;
1488     struct quicktime_mjpeg_app1 *p_app1 = NULL;
1489
1490     /* re-queue the last frame we sync'd */
1491     if( p_sys->i_frame_pos != -1 )
1492     {
1493         while( ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT,
1494                                        &p_sys->i_frame_pos ) < 0 )
1495         {
1496             if( errno != EAGAIN && errno != EINTR )
1497             {
1498                 msg_Err( p_demux, "failed capturing new frame" );
1499                 return NULL;
1500             }
1501         }
1502     }
1503
1504     /* sync on the next frame */
1505     while( ioctl( p_sys->fd_video, MJPIOC_SYNC, &sync ) < 0 )
1506     {
1507         if( errno != EAGAIN && errno != EINTR )
1508         {
1509             msg_Err( p_demux, "failed syncing new frame" );
1510             return NULL;
1511         }
1512     }
1513
1514     p_sys->i_frame_pos = sync.frame;
1515     p_frame = p_sys->p_video_mmap + p_sys->mjpeg_buffers.size * sync.frame;
1516
1517     /* p_frame now points to the data.  fix up the Quicktime APP1 marker */
1518     tag = 0xffd9;
1519     tag = hton16( tag );
1520     p_field = p_frame;
1521
1522     /* look for EOI */
1523     p = memmem( p_field, sync.length, &tag, 2 );
1524
1525     if( p )
1526     {
1527         p += 2; /* data immediately following EOI */
1528         /* UNALIGNED! */
1529         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1530
1531         i_size = ((uint32_t)(p - p_field));
1532         i_size = hton32( i_size );
1533         memcpy( &p_app1->i_field_size, &i_size, 4 );
1534
1535         while( *p == 0xff && *(p+1) == 0xff )
1536             p++;
1537
1538         i_size = ((uint32_t)(p - p_field));
1539         i_size = hton32( i_size );
1540         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1541     }
1542
1543     tag = 0xffd8;
1544     tag = hton16( tag );
1545     p_field = memmem( p, sync.length - (size_t)(p - p_frame), &tag, 2 );
1546
1547     if( p_field )
1548     {
1549         i_size = (uint32_t)(p_field - p_frame);
1550         i_size = hton32( i_size );
1551         memcpy( &p_app1->i_next_field, &i_size, 4 );
1552
1553         /* UNALIGNED! */
1554         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1555         tag = 0xffd9;
1556         tag = hton16( tag );
1557         p = memmem( p_field, sync.length - (size_t)(p_field - p_frame),
1558                 &tag, 2 );
1559
1560         if( !p )
1561         {
1562             /* sometimes the second field doesn't have the EOI.  just put it
1563              * there
1564              */
1565             p = p_frame + sync.length;
1566             memcpy( p, &tag, 2 );
1567             sync.length += 2;
1568         }
1569
1570         p += 2;
1571         i_size = (uint32_t)(p - p_field);
1572         i_size = hton32( i_size );
1573         memcpy( &p_app1->i_field_size, &i_size, 4 );
1574         i_size = (uint32_t)(sync.length - (uint32_t)(p_field - p_frame));
1575         i_size = hton32( i_size );
1576         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1577     }
1578
1579     p_sys->i_video_frame_size = sync.length;
1580     return p_frame;
1581 }
1582
1583 static block_t *GrabVideo( demux_t *p_demux )
1584 {
1585     demux_sys_t *p_sys = p_demux->p_sys;
1586     uint8_t     *p_frame;
1587     block_t     *p_block;
1588
1589     if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1590     {
1591         mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1592
1593         /* Did we wait long enough ? (frame rate reduction) */
1594         if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1595     }
1596
1597     if( p_sys->b_mjpeg ) p_frame = GrabMJPEG( p_demux );
1598     else p_frame = GrabCapture( p_demux );
1599
1600     if( !p_frame ) return 0;
1601
1602     if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
1603     {
1604         msg_Warn( p_demux, "cannot get block" );
1605         return 0;
1606     }
1607
1608     memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
1609     p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1610
1611     return p_block;
1612 }