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