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

   1 /*****************************************************************************
   2  * v4l.c : Video4Linux input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002-2004 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33
  34 #include <vlc/vlc.h>
  35 #include <vlc/input.h>
  36 #include <vlc/vout.h>
  37 #include <codecs.h>
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <sys/ioctl.h>
  42 #include <unistd.h>
  43 #include <sys/mman.h>
  44 #include <errno.h>
  45 #include <fcntl.h>
  46
  47 /* From GStreamer's v4l plugin:
  48  * Because of some really cool feature in video4linux1, also known as
  49  * 'not including sys/types.h and sys/time.h', we had to include it
  50  * ourselves. In all their intelligence, these people decided to fix
  51  * this in the next version (video4linux2) in such a cool way that it
  52  * breaks all compilations of old stuff...
  53  * The real problem is actually that linux/time.h doesn't use proper
  54  * macro checks before defining types like struct timeval. The proper
  55  * fix here is to either fuck the kernel header (which is what we do
  56  * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
  57  * upstream, which I'll consider doing later on. If you get compiler
  58  * errors here, check your linux/time.h && sys/time.h header setup.
  59 */
  60 #define _LINUX_TIME_H
  61
  62 #include <linux/videodev.h>
  63 #include "videodev_mjpeg.h"
  64
  65 #include <sys/soundcard.h>
  66
  67 /*****************************************************************************
  68  * Module descriptior
  69  *****************************************************************************/
  70 static int  Open ( vlc_object_t * );
  71 static void Close( vlc_object_t * );
  72
  73 #define CACHING_TEXT N_("Caching value in ms")
  74 #define CACHING_LONGTEXT N_( \
  75     "Allows you to modify the default caching value for v4l streams. This " \
  76     "value should be set in millisecond units." )
  77 #define VDEV_TEXT N_("Video device name")
  78 #define VDEV_LONGTEXT N_( \
  79     "Specify the name of the video device that will be used. " \
  80     "If you don't specify anything, no video device will be used.")
  81 #define ADEV_TEXT N_("Audio device name")
  82 #define ADEV_LONGTEXT N_( \
  83     "Specify the name of the audio device that will be used. " \
  84     "If you don't specify anything, no audio device will be used.")
  85 #define CHROMA_TEXT N_("Video input chroma format")
  86 #define CHROMA_LONGTEXT N_( \
  87     "Force the Video4Linux video device to use a specific chroma format " \
  88     "(eg. I420 (default), RV24, etc.)")
  89 #define FREQUENCY_TEXT N_( "Frequency" )
  90 #define FREQUENCY_LONGTEXT N_( \
  91     "Frequency to capture (in kHz), if applicable" )
  92 #define CHANNEL_TEXT N_( "Channel" )
  93 #define CHANNEL_LONGTEXT N_( \
  94     "Channel of the card to use (Usually, 0 = tuner, " \
  95     "1 = composite, 2 = svideo)" )
  96 #define NORM_TEXT N_( "Norm" )
  97 #define NORM_LONGTEXT N_( \
  98     "Defines the norm of the stream (Automatic, SECAM, PAL, or NTSC)" )
  99 #define AUDIO_TEXT N_( "Audio Channel" )
 100 #define AUDIO_LONGTEXT N_( \
 101     "Audio Channel to use, if there are several audio input" )
 102 #define WIDTH_TEXT N_( "Width" )
 103 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
 104     "(-1 for autodetect)" )
 105 #define HEIGHT_TEXT N_( "Height" )
 106 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
 107     "(-1 for autodetect)" )
 108 #define BRIGHTNESS_TEXT N_( "Brightness" )
 109 #define BRIGHTNESS_LONGTEXT N_( \
 110     "Set the Brightness of the video input" )
 111 #define HUE_TEXT N_( "Hue" )
 112 #define HUE_LONGTEXT N_( \
 113     "Set the Hue of the video input" )
 114 #define COLOUR_TEXT N_( "Colour" )
 115 #define COLOUR_LONGTEXT N_( \
 116     "Set the Colour of the video input" )
 117 #define CONTRAST_TEXT N_( "Contrast" )
 118 #define CONTRAST_LONGTEXT N_( \
 119     "Set the Contrast of the video input" )
 120 #define TUNER_TEXT N_( "Tuner" )
 121 #define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones" )
 122 #define SAMPLERATE_TEXT N_( "Samplerate" )
 123 #define SAMPLERATE_LONGTEXT N_( \
 124     "Samplerate of the captures audio stream, in Hz" )
 125 #define STEREO_TEXT N_( "Stereo" )
 126 #define STEREO_LONGTEXT N_( \
 127     "If this option is set, the audio stream will be captured in stereo" )
 128 #define MJPEG_TEXT N_( "MJPEG" )
 129 #define MJPEG_LONGTEXT N_(  \
 130     "Set this option if the capture device outputs MJPEG" )
 131 #define DECIMATION_TEXT N_( "Decimation" )
 132 #define DECIMATION_LONGTEXT N_( \
 133     "Set the Decimation level for MJPEG streams" )
 134 #define QUALITY_TEXT N_( "Quality" )
 135 #define QUALITY_LONGTEXT N_( "Set the quality of the stream" )
 136 #define FPS_TEXT N_( "Framerate" )
 137 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
 138     "(-1 for auto)" )
 139
 140 static int i_norm_list[] =
 141     { VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
 142 static char *psz_norm_list_text[] =
 143     { N_("Automatic"), N_("SECAM"), N_("PAL"),  N_("NTSC") };
 144
 145 vlc_module_begin();
 146     set_shortname( _("Video4Linux") );
 147     set_description( _("Video4Linux input") );
 148     set_category( CAT_INPUT );
 149     set_subcategory( SUBCAT_INPUT_ACCESS );
 150
 151     add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
 152                  CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
 153     add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
 154                 VLC_FALSE );
 155     add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
 156                 VLC_FALSE );
 157     add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 158                 VLC_TRUE );
 159     add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
 160     add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
 161                 SAMPLERATE_LONGTEXT, VLC_TRUE );
 162     add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
 163                 VLC_TRUE );
 164     add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, VLC_TRUE );
 165     add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
 166                 VLC_FALSE );
 167         change_integer_list( i_norm_list, psz_norm_list_text, 0 );
 168     add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
 169                 VLC_FALSE );
 170     add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, VLC_TRUE );
 171     add_bool( "v4l-stereo", VLC_TRUE, NULL, STEREO_TEXT, STEREO_LONGTEXT,
 172             VLC_TRUE );
 173     add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, VLC_TRUE );
 174     add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
 175                 VLC_TRUE );
 176     add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
 177                 BRIGHTNESS_LONGTEXT, VLC_TRUE );
 178     add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
 179                 VLC_TRUE );
 180     add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, VLC_TRUE );
 181     add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
 182                 VLC_TRUE );
 183     add_bool( "v4l-mjpeg", VLC_FALSE, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
 184             VLC_TRUE );
 185     add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
 186             DECIMATION_LONGTEXT, VLC_TRUE );
 187     add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
 188             VLC_TRUE );
 189
 190     add_shortcut( "v4l" );
 191     set_capability( "access_demux", 10 );
 192     set_callbacks( Open, Close );
 193 vlc_module_end();
 194
 195 /*****************************************************************************
 196  * Access: local prototypes
 197  *****************************************************************************/
 198 static int Demux  ( demux_t * );
 199 static int Control( demux_t *, int, va_list );
 200
 201 static void ParseMRL    ( demux_t * );
 202 static int  OpenVideoDev( demux_t *, char * );
 203 static int  OpenAudioDev( demux_t *, char * );
 204
 205 static block_t *GrabAudio( demux_t * );
 206 static block_t *GrabVideo( demux_t * );
 207
 208 #define MJPEG_BUFFER_SIZE (256*1024)
 209
 210 struct quicktime_mjpeg_app1
 211 {
 212     uint32_t    i_reserved;             /* set to 0 */
 213     uint32_t    i_tag;                  /* 'mjpg' */
 214     uint32_t    i_field_size;           /* offset following EOI */
 215     uint32_t    i_padded_field_size;    /* offset following EOI+pad */
 216     uint32_t    i_next_field;           /* offset to next field */
 217     uint32_t    i_DQT_offset;
 218     uint32_t    i_DHT_offset;
 219     uint32_t    i_SOF_offset;
 220     uint32_t    i_SOS_offset;
 221     uint32_t    i_data_offset;          /* following SOS marker data */
 222 };
 223
 224 static struct
 225 {
 226     int i_v4l;
 227     int i_fourcc;
 228
 229 } v4lchroma_to_fourcc[] =
 230 {
 231     { VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
 232     { VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
 233     { VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
 234     { VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
 235     { VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
 236     { VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
 237     { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'I', '4', '2', '2' ) },
 238     { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
 239     { VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
 240     { VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
 241     { VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
 242     { VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
 243     { VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
 244     { VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
 245     { VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
 246     { 0, 0 }
 247 };
 248
 249 struct demux_sys_t
 250 {
 251     /* Devices */
 252     char *psz_device;         /* Main device from MRL, can be video or audio */
 253
 254     char *psz_vdev;
 255     int  fd_video;
 256
 257     char *psz_adev;
 258     int  fd_audio;
 259
 260     /* Video properties */
 261     picture_t pic;
 262
 263     int i_fourcc;
 264     int i_channel;
 265     int i_audio;
 266     int i_norm;
 267     int i_tuner;
 268     int i_frequency;
 269     int i_width;
 270     int i_height;
 271
 272     int i_brightness;
 273     int i_hue;
 274     int i_colour;
 275     int i_contrast;
 276
 277     float f_fps;            /* <= 0.0 mean to grab at full rate */
 278     mtime_t i_video_pts;    /* only used when f_fps > 0 */
 279
 280     vlc_bool_t b_mjpeg;
 281     int i_decimation;
 282     int i_quality;
 283
 284     struct video_capability vid_cap;
 285     struct video_mbuf       vid_mbuf;
 286     struct mjpeg_requestbuffers mjpeg_buffers;
 287
 288     uint8_t *p_video_mmap;
 289     int     i_frame_pos;
 290
 291     struct video_mmap   vid_mmap;
 292     struct video_picture vid_picture;
 293
 294     int          i_video_frame_size;
 295     es_out_id_t  *p_es_video;
 296
 297     /* Audio properties */
 298     vlc_fourcc_t i_acodec_raw;
 299     int          i_sample_rate;
 300     vlc_bool_t   b_stereo;
 301     int          i_audio_max_frame_size;
 302     block_t      *p_block_audio;
 303     es_out_id_t  *p_es_audio;
 304 };
 305
 306 /*****************************************************************************
 307  * Open: opens v4l device
 308  *****************************************************************************
 309  *
 310  * url: <video device>::::
 311  *
 312  *****************************************************************************/
 313 static int Open( vlc_object_t *p_this )
 314 {
 315     demux_t     *p_demux = (demux_t*)p_this;
 316     demux_sys_t *p_sys;
 317     vlc_value_t val;
 318
 319     /* Only when selected */
 320     if( *p_demux->psz_access == '\0' )
 321         return VLC_EGENERIC;
 322
 323     /* Set up p_demux */
 324     p_demux->pf_demux = Demux;
 325     p_demux->pf_control = Control;
 326     p_demux->info.i_update = 0;
 327     p_demux->info.i_title = 0;
 328     p_demux->info.i_seekpoint = 0;
 329     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 330     memset( p_sys, 0, sizeof( demux_sys_t ) );
 331
 332     var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 333     var_Get( p_demux, "v4l-audio", &val );
 334     p_sys->i_audio          = val.i_int;
 335
 336     var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 337     var_Get( p_demux, "v4l-channel", &val );
 338     p_sys->i_channel        = val.i_int;
 339
 340     var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 341     var_Get( p_demux, "v4l-norm", &val );
 342     p_sys->i_norm           = val.i_int;
 343
 344     var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 345     var_Get( p_demux, "v4l-tuner", &val );
 346     p_sys->i_tuner          = val.i_int;
 347
 348     var_Create( p_demux, "v4l-frequency",
 349                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 350     var_Get( p_demux, "v4l-frequency", &val );
 351     p_sys->i_frequency      = val.i_int;
 352
 353     var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 354     var_Get( p_demux, "v4l-fps", &val );
 355     p_sys->f_fps            = val.f_float;
 356
 357     var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 358     var_Get( p_demux, "v4l-width", &val );
 359     p_sys->i_width          = val.i_int;
 360
 361     var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 362     var_Get( p_demux, "v4l-height", &val );
 363     p_sys->i_width          = val.i_int;
 364
 365     p_sys->i_video_pts      = -1;
 366
 367     var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
 368                                                         VLC_VAR_DOINHERIT );
 369     var_Get( p_demux, "v4l-brightness", &val );
 370     p_sys->i_brightness     = val.i_int;
 371
 372     var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 373     var_Get( p_demux, "v4l-hue", &val );
 374     p_sys->i_hue            = -1;
 375
 376     var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 377     var_Get( p_demux, "v4l-colour", &val );
 378     p_sys->i_colour         = val.i_int;
 379
 380     var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 381     var_Get( p_demux, "v4l-contrast", &val );
 382     p_sys->i_contrast       = val.i_int;
 383
 384     var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 385     var_Get( p_demux, "v4l-mjpeg", &val );
 386     p_sys->b_mjpeg     = val.b_bool;
 387
 388     var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
 389                                                             VLC_VAR_DOINHERIT );
 390     var_Get( p_demux, "v4l-decimation", &val );
 391     p_sys->i_decimation = val.i_int;
 392
 393     var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 394     var_Get( p_demux, "v4l-quality", &val );
 395     p_sys->i_quality = val.i_int;
 396
 397     var_Create( p_demux, "v4l-samplerate",
 398                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 399     var_Get( p_demux, "v4l-samplerate", &val );
 400     p_sys->i_sample_rate  = val.i_int;
 401
 402     var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 403     var_Get( p_demux, "v4l-stereo", &val );
 404     p_sys->b_stereo       = val.b_bool;
 405
 406     p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
 407     p_sys->fd_video = -1;
 408     p_sys->fd_audio = -1;
 409
 410     p_sys->p_es_video = p_sys->p_es_audio = 0;
 411     p_sys->p_block_audio = 0;
 412
 413     ParseMRL( p_demux );
 414
 415     /* Find main device (video or audio) */
 416     if( p_sys->psz_device && *p_sys->psz_device )
 417     {
 418         msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
 419
 420         /* Try to open as video device */
 421         p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
 422
 423         if( p_sys->fd_video < 0 )
 424         {
 425             /* Try to open as audio device */
 426             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
 427             if( p_sys->fd_audio >= 0 )
 428             {
 429                 if( p_sys->psz_adev ) free( p_sys->psz_adev );
 430                 p_sys->psz_adev = p_sys->psz_device;
 431                 p_sys->psz_device = NULL;
 432             }
 433         }
 434         else
 435         {
 436             if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
 437             p_sys->psz_vdev = p_sys->psz_device;
 438             p_sys->psz_device = NULL;
 439         }
 440     }
 441
 442     /* If no device opened, only continue if the access was forced */
 443     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 444     {
 445         if( strcmp( p_demux->psz_access, "v4l" ) )
 446         {
 447             Close( p_this );
 448             return VLC_EGENERIC;
 449         }
 450     }
 451
 452     /* Find video device */
 453     if( p_sys->fd_video < 0 )
 454     {
 455         if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
 456         {
 457             if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
 458             p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
 459         }
 460
 461         if( p_sys->psz_vdev && *p_sys->psz_vdev )
 462         {
 463             p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
 464         }
 465     }
 466
 467     /* Find audio device */
 468     if( p_sys->fd_audio < 0 )
 469     {
 470         if( !p_sys->psz_adev || !*p_sys->psz_adev )
 471         {
 472             if( p_sys->psz_adev ) free( p_sys->psz_adev );
 473             p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
 474         }
 475
 476         if( p_sys->psz_adev && *p_sys->psz_adev )
 477         {
 478             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
 479         }
 480     }
 481
 482     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 483     {
 484         Close( p_this );
 485         return VLC_EGENERIC;
 486     }
 487
 488     msg_Dbg( p_demux, "v4l grabbing started" );
 489
 490     /* Declare elementary streams */
 491     if( p_sys->fd_video >= 0 )
 492     {
 493         es_format_t fmt;
 494         es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
 495         fmt.video.i_width  = p_sys->i_width;
 496         fmt.video.i_height = p_sys->i_height;
 497         fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
 498
 499         /* Setup rgb mask for RGB formats */
 500         if( p_sys->i_fourcc == VLC_FOURCC('R','V','2','4') )
 501         {
 502             /* This is in BGR format */
 503             fmt.video.i_bmask = 0x00ff0000;
 504             fmt.video.i_gmask = 0x0000ff00;
 505             fmt.video.i_rmask = 0x000000ff;
 506         }
 507
 508         msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
 509                  (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
 510         p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
 511     }
 512
 513     if( p_sys->fd_audio >= 0 )
 514     {
 515         es_format_t fmt;
 516         es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
 517
 518         fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
 519         fmt.audio.i_rate = p_sys->i_sample_rate;
 520         fmt.audio.i_bitspersample = 16; // FIXME ?
 521         fmt.audio.i_blockalign = fmt.audio.i_channels *
 522             fmt.audio.i_bitspersample / 8;
 523         fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
 524             fmt.audio.i_bitspersample;
 525
 526         msg_Dbg( p_demux, "new audio es %d channels %dHz",
 527                  fmt.audio.i_channels, fmt.audio.i_rate );
 528
 529         p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
 530     }
 531
 532     /* Update default_pts to a suitable value for access */
 533     var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 534
 535     return VLC_SUCCESS;
 536 }
 537
 538 /*****************************************************************************
 539  * Close: close device, free resources
 540  *****************************************************************************/
 541 static void Close( vlc_object_t *p_this )
 542 {
 543     demux_t     *p_demux = (demux_t *)p_this;
 544     demux_sys_t *p_sys   = p_demux->p_sys;
 545
 546     if( p_sys->psz_device ) free( p_sys->psz_device );
 547     if( p_sys->psz_vdev )   free( p_sys->psz_vdev );
 548     if( p_sys->psz_adev )   free( p_sys->psz_adev );
 549     if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
 550     if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
 551     if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
 552
 553     if( p_sys->b_mjpeg )
 554     {
 555         int i_noframe = -1;
 556         ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
 557     }
 558
 559     if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
 560     {
 561         if( p_sys->b_mjpeg )
 562             munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
 563                     p_sys->mjpeg_buffers.count );
 564         else
 565             munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
 566     }
 567
 568     free( p_sys );
 569 }
 570
 571 /*****************************************************************************
 572  * Control:
 573  *****************************************************************************/
 574 static int Control( demux_t *p_demux, int i_query, va_list args )
 575 {
 576     vlc_bool_t *pb;
 577     int64_t    *pi64;
 578
 579     switch( i_query )
 580     {
 581         /* Special for access_demux */
 582         case DEMUX_CAN_PAUSE:
 583         case DEMUX_SET_PAUSE_STATE:
 584         case DEMUX_CAN_CONTROL_PACE:
 585             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 586             *pb = VLC_FALSE;
 587             return VLC_SUCCESS;
 588
 589         case DEMUX_GET_PTS_DELAY:
 590             pi64 = (int64_t*)va_arg( args, int64_t * );
 591             *pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
 592             return VLC_SUCCESS;
 593
 594         case DEMUX_GET_TIME:
 595             pi64 = (int64_t*)va_arg( args, int64_t * );
 596             *pi64 = mdate();
 597             return VLC_SUCCESS;
 598
 599         /* TODO implement others */
 600         default:
 601             return VLC_EGENERIC;
 602     }
 603
 604     return VLC_EGENERIC;
 605 }
 606
 607 /*****************************************************************************
 608  * Demux:
 609  *****************************************************************************/
 610 static int Demux( demux_t *p_demux )
 611 {
 612     demux_sys_t *p_sys = p_demux->p_sys;
 613     es_out_id_t  *p_es = p_sys->p_es_audio;
 614     block_t *p_block = NULL;
 615
 616     /* Try grabbing audio frames first */
 617     if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
 618     {
 619         /* Try grabbing video frame */
 620         p_es = p_sys->p_es_video;
 621         if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
 622     }
 623
 624     if( !p_block )
 625     {
 626         /* Sleep so we do not consume all the cpu, 10ms seems
 627          * like a good value (100fps) */
 628         msleep( 10000 );
 629         return 1;
 630     }
 631
 632     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
 633     es_out_Send( p_demux->out, p_es, p_block );
 634
 635     return 1;
 636 }
 637
 638 /*****************************************************************************
 639  * ParseMRL: parse the options contained in the MRL
 640  *****************************************************************************/
 641 static void ParseMRL( demux_t *p_demux )
 642 {
 643     demux_sys_t *p_sys = p_demux->p_sys;
 644
 645     char *psz_dup = strdup( p_demux->psz_path );
 646     char *psz_parser = psz_dup;
 647
 648     while( *psz_parser && *psz_parser != ':' )
 649     {
 650         psz_parser++;
 651     }
 652
 653     if( *psz_parser == ':' )
 654     {
 655         /* read options */
 656         for( ;; )
 657         {
 658             *psz_parser++ = '\0';
 659             if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
 660             {
 661                 p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
 662                                            &psz_parser, 0 );
 663             }
 664             else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
 665             {
 666                 psz_parser += strlen( "norm=" );
 667                 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
 668                 {
 669                     p_sys->i_norm = VIDEO_MODE_PAL;
 670                     psz_parser += strlen( "pal" );
 671                 }
 672                 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
 673                 {
 674                     p_sys->i_norm = VIDEO_MODE_NTSC;
 675                     psz_parser += strlen( "ntsc" );
 676                 }
 677                 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
 678                 {
 679                     p_sys->i_norm = VIDEO_MODE_SECAM;
 680                     psz_parser += strlen( "secam" );
 681                 }
 682                 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
 683                 {
 684                     p_sys->i_norm = VIDEO_MODE_AUTO;
 685                     psz_parser += strlen( "auto" );
 686                 }
 687                 else
 688                 {
 689                     p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
 690                 }
 691             }
 692             else if( !strncmp( psz_parser, "frequency=",
 693                                strlen( "frequency=" ) ) )
 694             {
 695                 p_sys->i_frequency =
 696                     strtol( psz_parser + strlen( "frequency=" ),
 697                             &psz_parser, 0 );
 698                 if( p_sys->i_frequency < 30000 )
 699                 {
 700                     msg_Warn( p_demux, "v4l syntax has changed : "
 701                               "'frequency' is now channel frequency in kHz");
 702                 }
 703             }
 704             else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
 705             {
 706                 p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
 707                                          &psz_parser, 0 );
 708             }
 709             else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
 710             {
 711                 psz_parser += strlen( "size=" );
 712                 if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
 713                 {
 714                     p_sys->i_width  = 128;
 715                     p_sys->i_height = 96;
 716                 }
 717                 else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
 718                 {
 719                     p_sys->i_width  = 160;
 720                     p_sys->i_height = 120;
 721                 }
 722                 else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
 723                 {
 724                     p_sys->i_width  = 176;
 725                     p_sys->i_height = 144;
 726                 }
 727                 else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
 728                 {
 729                     p_sys->i_width  = 320;
 730                     p_sys->i_height = 244;
 731                 }
 732                 else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
 733                 {
 734                     p_sys->i_width  = 352;
 735                     p_sys->i_height = 288;
 736                 }
 737                 else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
 738                 {
 739                     p_sys->i_width  = 640;
 740                     p_sys->i_height = 480;
 741                 }
 742                 else
 743                 {
 744                     /* widthxheight */
 745                     p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
 746                     if( *psz_parser == 'x' || *psz_parser == 'X')
 747                     {
 748                         p_sys->i_height = strtol( psz_parser + 1,
 749                                                   &psz_parser, 0 );
 750                     }
 751                     msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
 752                              p_sys->i_height );
 753                 }
 754             }
 755             else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
 756             {
 757                 p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
 758                                               &psz_parser, 0 );
 759             }
 760             else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
 761             {
 762                 p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
 763                                           &psz_parser, 0 );
 764             }
 765             else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
 766             {
 767                 p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
 768                                        &psz_parser, 0 );
 769             }
 770             else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
 771             {
 772                 p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
 773                                             &psz_parser, 0 );
 774             }
 775             else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
 776             {
 777                 p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
 778                                          &psz_parser, 0 );
 779             }
 780             else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
 781             {
 782                 int  i_len;
 783
 784                 psz_parser += strlen( "adev=" );
 785                 if( strchr( psz_parser, ':' ) )
 786                 {
 787                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 788                 }
 789                 else
 790                 {
 791                     i_len = strlen( psz_parser );
 792                 }
 793
 794                 p_sys->psz_adev = strndup( psz_parser, i_len );
 795
 796                 psz_parser += i_len;
 797             }
 798             else if( !strncmp( psz_parser, "samplerate=",
 799                                strlen( "samplerate=" ) ) )
 800             {
 801                 p_sys->i_sample_rate =
 802                     strtol( psz_parser + strlen( "samplerate=" ),
 803                             &psz_parser, 0 );
 804             }
 805             else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
 806             {
 807                 psz_parser += strlen( "stereo" );
 808
 809                 p_sys->b_stereo = VLC_TRUE;
 810             }
 811             else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
 812             {
 813                 psz_parser += strlen( "mono" );
 814
 815                 p_sys->b_stereo = VLC_FALSE;
 816             }
 817             else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
 818             {
 819                 psz_parser += strlen( "mjpeg" );
 820
 821                 p_sys->b_mjpeg = VLC_TRUE;
 822             }
 823             else if( !strncmp( psz_parser, "decimation=",
 824                         strlen( "decimation=" ) ) )
 825             {
 826                 p_sys->i_decimation =
 827                     strtol( psz_parser + strlen( "decimation=" ),
 828                             &psz_parser, 0 );
 829             }
 830             else if( !strncmp( psz_parser, "quality=",
 831                         strlen( "quality=" ) ) )
 832             {
 833                 p_sys->i_quality =
 834                     strtol( psz_parser + strlen( "quality=" ),
 835                             &psz_parser, 0 );
 836             }
 837             else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
 838             {
 839                 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
 840                                        &psz_parser );
 841             }
 842             else
 843             {
 844                 msg_Warn( p_demux, "unknown option" );
 845             }
 846
 847             while( *psz_parser && *psz_parser != ':' )
 848             {
 849                 psz_parser++;
 850             }
 851
 852             if( *psz_parser == '\0' )
 853             {
 854                 break;
 855             }
 856         }
 857     }
 858
 859     if( *psz_dup )
 860     {
 861         p_sys->psz_device = strdup( psz_dup );
 862     }
 863     if( psz_dup ) free( psz_dup );
 864 }
 865
 866 /*****************************************************************************
 867  * OpenVideoDev:
 868  *****************************************************************************/
 869 static int OpenVideoDev( demux_t *p_demux, char *psz_device )
 870 {
 871     demux_sys_t *p_sys = p_demux->p_sys;
 872     int i_fd;
 873
 874     struct video_channel vid_channel;
 875     struct mjpeg_params mjpeg;
 876     int i;
 877
 878     if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
 879     {
 880         msg_Err( p_demux, "cannot open device (%s)", strerror( errno ) );
 881         goto vdev_failed;
 882     }
 883
 884     if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
 885     {
 886         msg_Err( p_demux, "cannot get capabilities (%s)", strerror( errno ) );
 887         goto vdev_failed;
 888     }
 889
 890     msg_Dbg( p_demux,
 891              "V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
 892              p_sys->vid_cap.name,
 893              p_sys->vid_cap.channels,
 894              p_sys->vid_cap.audios,
 895              p_sys->vid_cap.minwidth,  p_sys->vid_cap.maxwidth,
 896              p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
 897
 898     if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
 899     {
 900         msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
 901         p_sys->i_channel = 0;
 902     }
 903     if( p_sys->i_audio >= p_sys->vid_cap.audios )
 904     {
 905         msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
 906         p_sys->i_audio = -1;
 907     }
 908
 909     if( p_sys->i_width < p_sys->vid_cap.minwidth ||
 910         p_sys->i_width > p_sys->vid_cap.maxwidth )
 911     {
 912         msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
 913         p_sys->i_width = 0;
 914     }
 915     if( p_sys->i_height < p_sys->vid_cap.minheight ||
 916         p_sys->i_height > p_sys->vid_cap.maxheight )
 917     {
 918         msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
 919         p_sys->i_height = 0;
 920     }
 921
 922     if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
 923     {
 924         msg_Err( p_demux, "cannot grab" );
 925         goto vdev_failed;
 926     }
 927
 928     vid_channel.channel = p_sys->i_channel;
 929     if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
 930     {
 931         msg_Err( p_demux, "cannot get channel infos (%s)",
 932                           strerror( errno ) );
 933         goto vdev_failed;
 934     }
 935     msg_Dbg( p_demux,
 936              "setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
 937              vid_channel.name, vid_channel.channel, vid_channel.tuners,
 938              vid_channel.flags, vid_channel.type, vid_channel.norm );
 939
 940     if( p_sys->i_tuner >= vid_channel.tuners )
 941     {
 942         msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
 943         p_sys->i_tuner = 0;
 944     }
 945
 946     vid_channel.norm = p_sys->i_norm;
 947     if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
 948     {
 949         msg_Err( p_demux, "cannot set channel (%s)", strerror( errno ) );
 950         goto vdev_failed;
 951     }
 952
 953     if( vid_channel.flags & VIDEO_VC_TUNER )
 954     {
 955
 956         /* set tuner */
 957 #if 0
 958         struct video_tuner vid_tuner;
 959         if( p_sys->i_tuner >= 0 )
 960         {
 961             vid_tuner.tuner = p_sys->i_tuner;
 962             if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
 963             {
 964                 msg_Err( p_demux, "cannot get tuner (%s)", strerror( errno ) );
 965                 goto vdev_failed;
 966             }
 967             msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
 968                      "mode=0x%x signal=0x%x",
 969                      vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
 970                      vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
 971
 972             msg_Dbg( p_demux, "setting tuner %s (%d)",
 973                      vid_tuner.name, vid_tuner.tuner );
 974
 975             /* FIXME FIXME to be checked FIXME FIXME */
 976             //vid_tuner.mode = p_sys->i_norm;
 977             if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
 978             {
 979                 msg_Err( p_demux, "cannot set tuner (%s)", strerror( errno ) );
 980                 goto vdev_failed;
 981             }
 982         }
 983 #endif
 984
 985         /* Show a warning if frequency is < than 30000.
 986          * User is certainly usint old syntax. */
 987
 988
 989         /* set frequency */
 990         if( p_sys->i_frequency >= 0 )
 991         {
 992             int driver_frequency = p_sys->i_frequency * 16 /1000;
 993             if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
 994             {
 995                 msg_Err( p_demux, "cannot set frequency (%s)",
 996                                   strerror( errno ) );
 997                 goto vdev_failed;
 998             }
 999             msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1000                                                    driver_frequency );
1001         }
1002     }
1003
1004     /* set audio */
1005     if( vid_channel.flags & VIDEO_VC_AUDIO )
1006     {
1007         struct video_audio      vid_audio;
1008
1009         /* XXX TODO volume, balance, ... */
1010         if( p_sys->i_audio >= 0 )
1011         {
1012             vid_audio.audio = p_sys->i_audio;
1013             if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1014             {
1015                 msg_Err( p_demux, "cannot get audio (%s)", strerror( errno ) );
1016                 goto vdev_failed;
1017             }
1018
1019             /* unmute audio */
1020             vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1021
1022             if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1023             {
1024                 msg_Err( p_demux, "cannot set audio (%s)", strerror( errno ) );
1025                 goto vdev_failed;
1026             }
1027         }
1028
1029     }
1030
1031     /* establish basic params with input and norm before feeling width
1032      * or height */
1033     if( p_sys->b_mjpeg )
1034     {
1035         struct quicktime_mjpeg_app1 *p_app1;
1036         int32_t i_offset;
1037
1038         if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1039         {
1040             msg_Err( p_demux, "cannot get mjpeg params (%s)",
1041                               strerror( errno ) );
1042             goto vdev_failed;
1043         }
1044         mjpeg.input = p_sys->i_channel;
1045         mjpeg.norm  = p_sys->i_norm;
1046         mjpeg.decimation = p_sys->i_decimation;
1047
1048         if( p_sys->i_width )
1049             mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1050         if( p_sys->i_height )
1051             mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1052
1053         /* establish Quicktime APP1 marker while we are here */
1054         mjpeg.APPn = 1;
1055         mjpeg.APP_len = 40;
1056
1057         /* aligned */
1058         p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1059         p_app1->i_reserved = 0;
1060         p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1061         p_app1->i_field_size = 0;
1062         p_app1->i_padded_field_size = 0;
1063         p_app1->i_next_field = 0;
1064         /* XXX WARNING XXX */
1065         /* these's nothing magic about these values.  We are dangerously
1066          * assuming the encoder card is encoding mjpeg-a and is not throwing
1067          * in marker tags we aren't expecting.  It's bad enough we have to
1068          * search through the jpeg output for every frame we grab just to
1069          * find the first field's end marker, so we take this risk to boost
1070          * performance.
1071          * This is really something the driver could do for us because this
1072          * does conform to standards outside of Apple Quicktime.
1073          */
1074         i_offset = 0x2e;
1075         p_app1->i_DQT_offset = hton32( i_offset );
1076         i_offset = 0xb4;
1077         p_app1->i_DHT_offset = hton32( i_offset );
1078         i_offset = 0x258;
1079         p_app1->i_SOF_offset = hton32( i_offset );
1080         i_offset = 0x26b;
1081         p_app1->i_SOS_offset = hton32( i_offset );
1082         i_offset = 0x279;
1083         p_app1->i_data_offset = hton32( i_offset );
1084
1085         /* SOF and SOS aren't specified by the mjpeg API because they aren't
1086          * optional.  They will be present in the output. */
1087         mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1088
1089         if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1090         {
1091             msg_Err( p_demux, "cannot set mjpeg params (%s)",
1092                               strerror( errno ) );
1093             goto vdev_failed;
1094         }
1095
1096         p_sys->i_width = mjpeg.img_width * mjpeg.HorDcm;
1097         p_sys->i_height = mjpeg.img_height * mjpeg.VerDcm *
1098             mjpeg.field_per_buff;
1099     }
1100
1101     /* fix width/height */
1102     if( !p_sys->b_mjpeg && ( p_sys->i_width == 0 || p_sys->i_height == 0 ) )
1103     {
1104         struct video_window vid_win;
1105
1106         if( ioctl( i_fd, VIDIOCGWIN, &vid_win ) < 0 )
1107         {
1108             msg_Err( p_demux, "cannot get win (%s)", strerror( errno ) );
1109             goto vdev_failed;
1110         }
1111         p_sys->i_width  = vid_win.width;
1112         p_sys->i_height = vid_win.height;
1113
1114         msg_Dbg( p_demux, "will use %dx%d", p_sys->i_width, p_sys->i_height );
1115     }
1116
1117     if( !p_sys->b_mjpeg )
1118     {
1119         /* set hue/color/.. */
1120         if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1121         {
1122             struct video_picture vid_picture = p_sys->vid_picture;
1123
1124             if( p_sys->i_brightness >= 0 && p_sys->i_brightness < 65536 )
1125             {
1126                 vid_picture.brightness = p_sys->i_brightness;
1127             }
1128             if( p_sys->i_colour >= 0 && p_sys->i_colour < 65536 )
1129             {
1130                 vid_picture.colour = p_sys->i_colour;
1131             }
1132             if( p_sys->i_hue >= 0 && p_sys->i_hue < 65536 )
1133             {
1134                 vid_picture.hue = p_sys->i_hue;
1135             }
1136             if( p_sys->i_contrast  >= 0 && p_sys->i_contrast < 65536 )
1137             {
1138                 vid_picture.contrast = p_sys->i_contrast;
1139             }
1140             if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1141             {
1142                 msg_Dbg( p_demux, "v4l device uses brightness: %d",
1143                          vid_picture.brightness );
1144                 msg_Dbg( p_demux, "v4l device uses colour: %d",
1145                          vid_picture.colour );
1146                 msg_Dbg( p_demux, "v4l device uses hue: %d", vid_picture.hue );
1147                 msg_Dbg( p_demux, "v4l device uses contrast: %d",
1148                          vid_picture.contrast );
1149                 p_sys->vid_picture = vid_picture;
1150             }
1151         }
1152
1153         /* Find out video format used by device */
1154         if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1155         {
1156             struct video_picture vid_picture = p_sys->vid_picture;
1157             char *psz;
1158             int i;
1159
1160             vid_picture.palette = 0;
1161             p_sys->i_fourcc = 0;
1162
1163             psz = var_CreateGetString( p_demux, "v4l-chroma" );
1164             if( strlen( psz ) >= 4 )
1165             {
1166                 int i_chroma = VLC_FOURCC( psz[0], psz[1], psz[2], psz[3] );
1167
1168                 /* Find out v4l chroma code */
1169                 for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1170                 {
1171                     if( v4lchroma_to_fourcc[i].i_fourcc == i_chroma )
1172                     {
1173                         vid_picture.palette = v4lchroma_to_fourcc[i].i_v4l;
1174                         break;
1175                     }
1176                 }
1177             }
1178             free( psz );
1179
1180             if( vid_picture.palette &&
1181                 !ioctl( i_fd, VIDIOCSPICT, &vid_picture ) )
1182             {
1183                 p_sys->vid_picture = vid_picture;
1184             }
1185             else
1186             {
1187                 /* Try to set the format to something easy to encode */
1188                 vid_picture.palette = VIDEO_PALETTE_YUV420P;
1189                 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1190                 {
1191                     p_sys->vid_picture = vid_picture;
1192                 }
1193                 else
1194                 {
1195                     vid_picture.palette = VIDEO_PALETTE_YUV422P;
1196                     if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1197                     {
1198                         p_sys->vid_picture = vid_picture;
1199                     }
1200                 }
1201             }
1202
1203             /* Find out final format */
1204             for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1205             {
1206                 if( v4lchroma_to_fourcc[i].i_v4l == p_sys->vid_picture.palette)
1207                 {
1208                     p_sys->i_fourcc = v4lchroma_to_fourcc[i].i_fourcc;
1209                     break;
1210                 }
1211             }
1212         }
1213         else
1214         {
1215             msg_Err( p_demux, "ioctl VIDIOCGPICT failed" );
1216             goto vdev_failed;
1217         }
1218     }
1219
1220     if( p_sys->b_mjpeg )
1221     {
1222         int i;
1223
1224         p_sys->mjpeg_buffers.count = 8;
1225         p_sys->mjpeg_buffers.size = MJPEG_BUFFER_SIZE;
1226
1227         if( ioctl( i_fd, MJPIOC_REQBUFS, &p_sys->mjpeg_buffers ) < 0 )
1228         {
1229             msg_Err( p_demux, "mmap unsupported" );
1230             goto vdev_failed;
1231         }
1232
1233         p_sys->p_video_mmap = mmap( 0,
1234                 p_sys->mjpeg_buffers.size * p_sys->mjpeg_buffers.count,
1235                 PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, 0 );
1236         if( p_sys->p_video_mmap == MAP_FAILED )
1237         {
1238             msg_Err( p_demux, "mmap failed" );
1239             goto vdev_failed;
1240         }
1241
1242         p_sys->i_fourcc  = VLC_FOURCC( 'm','j','p','g' );
1243         p_sys->i_frame_pos = -1;
1244
1245         /* queue up all the frames */
1246         for( i = 0; i < (int)p_sys->mjpeg_buffers.count; i++ )
1247         {
1248             if( ioctl( i_fd, MJPIOC_QBUF_CAPT, &i ) < 0 )
1249             {
1250                 msg_Err( p_demux, "unable to queue frame" );
1251                 goto vdev_failed;
1252             }
1253         }
1254     }
1255     else
1256     {
1257         /* Fill in picture_t fields */
1258         vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic, p_sys->i_fourcc,
1259                           p_sys->i_width, p_sys->i_height, p_sys->i_width *
1260                           VOUT_ASPECT_FACTOR / p_sys->i_height );
1261         if( !p_sys->pic.i_planes )
1262         {
1263             msg_Err( p_demux, "unsupported chroma" );
1264             goto vdev_failed;
1265         }
1266         p_sys->i_video_frame_size = 0;
1267         for( i = 0; i < p_sys->pic.i_planes; i++ )
1268         {
1269             p_sys->i_video_frame_size += p_sys->pic.p[i].i_visible_lines *
1270               p_sys->pic.p[i].i_visible_pitch;
1271         }
1272
1273         msg_Dbg( p_demux, "v4l device uses frame size: %i",
1274                  p_sys->i_video_frame_size );
1275         msg_Dbg( p_demux, "v4l device uses chroma: %4.4s",
1276                 (char*)&p_sys->i_fourcc );
1277
1278         /* Allocate mmap buffer */
1279         if( ioctl( i_fd, VIDIOCGMBUF, &p_sys->vid_mbuf ) < 0 )
1280         {
1281             msg_Err( p_demux, "mmap unsupported" );
1282             goto vdev_failed;
1283         }
1284
1285         p_sys->p_video_mmap = mmap( 0, p_sys->vid_mbuf.size,
1286                                     PROT_READ|PROT_WRITE, MAP_SHARED,
1287                                     i_fd, 0 );
1288         if( p_sys->p_video_mmap == MAP_FAILED )
1289         {
1290             /* FIXME -> normal read */
1291             msg_Err( p_demux, "mmap failed" );
1292             goto vdev_failed;
1293         }
1294
1295         /* init grabbing */
1296         p_sys->vid_mmap.frame  = 0;
1297         p_sys->vid_mmap.width  = p_sys->i_width;
1298         p_sys->vid_mmap.height = p_sys->i_height;
1299         p_sys->vid_mmap.format = p_sys->vid_picture.palette;
1300         if( ioctl( i_fd, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1301         {
1302             msg_Warn( p_demux, "%4.4s refused", (char*)&p_sys->i_fourcc );
1303             msg_Err( p_demux, "chroma selection failed" );
1304             goto vdev_failed;
1305         }
1306     }
1307     return i_fd;
1308
1309 vdev_failed:
1310
1311     if( i_fd >= 0 ) close( i_fd );
1312     return -1;
1313 }
1314
1315 /*****************************************************************************
1316  * OpenAudioDev:
1317  *****************************************************************************/
1318 static int OpenAudioDev( demux_t *p_demux, char *psz_device )
1319 {
1320     demux_sys_t *p_sys = p_demux->p_sys;
1321     int i_fd, i_format;
1322
1323     if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
1324     {
1325         msg_Err( p_demux, "cannot open audio device (%s)", strerror( errno ) );
1326         goto adev_fail;
1327     }
1328
1329     i_format = AFMT_S16_LE;
1330     if( ioctl( i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
1331         || i_format != AFMT_S16_LE )
1332     {
1333         msg_Err( p_demux, "cannot set audio format (16b little endian) "
1334                  "(%s)", strerror( errno ) );
1335         goto adev_fail;
1336     }
1337
1338     if( ioctl( i_fd, SNDCTL_DSP_STEREO,
1339                &p_sys->b_stereo ) < 0 )
1340     {
1341         msg_Err( p_demux, "cannot set audio channels count (%s)",
1342                  strerror( errno ) );
1343         goto adev_fail;
1344     }
1345
1346     if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1347                &p_sys->i_sample_rate ) < 0 )
1348     {
1349         msg_Err( p_demux, "cannot set audio sample rate (%s)",
1350                  strerror( errno ) );
1351         goto adev_fail;
1352     }
1353
1354     msg_Dbg( p_demux, "openened adev=`%s' %s %dHz",
1355              psz_device, p_sys->b_stereo ? "stereo" : "mono",
1356              p_sys->i_sample_rate );
1357
1358     p_sys->i_audio_max_frame_size = 6 * 1024;
1359
1360     return i_fd;
1361
1362  adev_fail:
1363
1364     if( i_fd >= 0 ) close( i_fd );
1365     return -1;
1366 }
1367
1368 /*****************************************************************************
1369  * GrabAudio: grab audio
1370  *****************************************************************************/
1371 static block_t *GrabAudio( demux_t *p_demux )
1372 {
1373     demux_sys_t *p_sys = p_demux->p_sys;
1374     struct audio_buf_info buf_info;
1375     int i_read, i_correct;
1376     block_t *p_block;
1377
1378     if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
1379     else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
1380
1381     if( !p_block )
1382     {
1383         msg_Warn( p_demux, "cannot get block" );
1384         return 0;
1385     }
1386
1387     p_sys->p_block_audio = p_block;
1388
1389     i_read = read( p_sys->fd_audio, p_block->p_buffer,
1390                    p_sys->i_audio_max_frame_size );
1391
1392     if( i_read <= 0 ) return 0;
1393
1394     p_block->i_buffer = i_read;
1395     p_sys->p_block_audio = 0;
1396
1397     /* Correct the date because of kernel buffering */
1398     i_correct = i_read;
1399     if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
1400     {
1401         i_correct += buf_info.bytes;
1402     }
1403
1404     p_block->i_pts = p_block->i_dts =
1405         mdate() - I64C(1000000) * (mtime_t)i_correct /
1406         2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
1407
1408     return p_block;
1409 }
1410
1411 /*****************************************************************************
1412  * GrabVideo:
1413  *****************************************************************************/
1414 static uint8_t *GrabCapture( demux_t *p_demux )
1415 {
1416     demux_sys_t *p_sys = p_demux->p_sys;
1417     int i_captured_frame = p_sys->i_frame_pos;
1418
1419     p_sys->vid_mmap.frame = (p_sys->i_frame_pos + 1) % p_sys->vid_mbuf.frames;
1420
1421     while( ioctl( p_sys->fd_video, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1422     {
1423         if( errno != EAGAIN )
1424         {
1425             msg_Err( p_demux, "failed capturing new frame" );
1426             return NULL;
1427         }
1428
1429         if( p_demux->b_die )
1430         {
1431             return NULL;
1432         }
1433
1434         msg_Dbg( p_demux, "grab failed, trying again" );
1435     }
1436
1437     while( ioctl(p_sys->fd_video, VIDIOCSYNC, &p_sys->i_frame_pos) < 0 )
1438     {
1439         if( errno != EAGAIN && errno != EINTR )
1440         {
1441             msg_Err( p_demux, "failed syncing new frame" );
1442             return NULL;
1443         }
1444     }
1445
1446     p_sys->i_frame_pos = p_sys->vid_mmap.frame;
1447     /* leave i_video_frame_size alone */
1448     return p_sys->p_video_mmap + p_sys->vid_mbuf.offsets[i_captured_frame];
1449 }
1450
1451 static uint8_t *GrabMJPEG( demux_t *p_demux )
1452 {
1453     demux_sys_t *p_sys = p_demux->p_sys;
1454     struct mjpeg_sync sync;
1455     uint8_t *p_frame, *p_field, *p;
1456     uint16_t tag;
1457     uint32_t i_size;
1458     struct quicktime_mjpeg_app1 *p_app1 = NULL;
1459
1460     /* re-queue the last frame we sync'd */
1461     if( p_sys->i_frame_pos != -1 )
1462     {
1463         while( ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT,
1464                                        &p_sys->i_frame_pos ) < 0 )
1465         {
1466             if( errno != EAGAIN && errno != EINTR )
1467             {
1468                 msg_Err( p_demux, "failed capturing new frame" );
1469                 return NULL;
1470             }
1471         }
1472     }
1473
1474     /* sync on the next frame */
1475     while( ioctl( p_sys->fd_video, MJPIOC_SYNC, &sync ) < 0 )
1476     {
1477         if( errno != EAGAIN && errno != EINTR )
1478         {
1479             msg_Err( p_demux, "failed syncing new frame" );
1480             return NULL;
1481         }
1482     }
1483
1484     p_sys->i_frame_pos = sync.frame;
1485     p_frame = p_sys->p_video_mmap + p_sys->mjpeg_buffers.size * sync.frame;
1486
1487     /* p_frame now points to the data.  fix up the Quicktime APP1 marker */
1488     tag = 0xffd9;
1489     tag = hton16( tag );
1490     p_field = p_frame;
1491
1492     /* look for EOI */
1493     p = memmem( p_field, sync.length, &tag, 2 );
1494
1495     if( p )
1496     {
1497         p += 2; /* data immediately following EOI */
1498         /* UNALIGNED! */
1499         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1500
1501         i_size = ((uint32_t)(p - p_field));
1502         i_size = hton32( i_size );
1503         memcpy( &p_app1->i_field_size, &i_size, 4 );
1504
1505         while( *p == 0xff && *(p+1) == 0xff )
1506             p++;
1507
1508         i_size = ((uint32_t)(p - p_field));
1509         i_size = hton32( i_size );
1510         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1511     }
1512
1513     tag = 0xffd8;
1514     tag = hton16( tag );
1515     p_field = memmem( p, sync.length - (size_t)(p - p_frame), &tag, 2 );
1516
1517     if( p_field )
1518     {
1519         i_size = (uint32_t)(p_field - p_frame);
1520         i_size = hton32( i_size );
1521         memcpy( &p_app1->i_next_field, &i_size, 4 );
1522
1523         /* UNALIGNED! */
1524         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1525         tag = 0xffd9;
1526         tag = hton16( tag );
1527         p = memmem( p_field, sync.length - (size_t)(p_field - p_frame),
1528                 &tag, 2 );
1529
1530         if( !p )
1531         {
1532             /* sometimes the second field doesn't have the EOI.  just put it
1533              * there
1534              */
1535             p = p_frame + sync.length;
1536             memcpy( p, &tag, 2 );
1537             sync.length += 2;
1538         }
1539
1540         p += 2;
1541         i_size = (uint32_t)(p - p_field);
1542         i_size = hton32( i_size );
1543         memcpy( &p_app1->i_field_size, &i_size, 4 );
1544         i_size = (uint32_t)(sync.length - (uint32_t)(p_field - p_frame));
1545         i_size = hton32( i_size );
1546         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1547     }
1548
1549     p_sys->i_video_frame_size = sync.length;
1550     return p_frame;
1551 }
1552
1553 static block_t *GrabVideo( demux_t *p_demux )
1554 {
1555     demux_sys_t *p_sys = p_demux->p_sys;
1556     uint8_t     *p_frame;
1557     block_t     *p_block;
1558
1559     if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1560     {
1561         mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1562
1563         /* Did we wait long enough ? (frame rate reduction) */
1564         if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1565     }
1566
1567     if( p_sys->b_mjpeg ) p_frame = GrabMJPEG( p_demux );
1568     else p_frame = GrabCapture( p_demux );
1569
1570     if( !p_frame ) return 0;
1571
1572     if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
1573     {
1574         msg_Warn( p_demux, "cannot get block" );
1575         return 0;
1576     }
1577
1578     memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
1579     p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1580
1581     return p_block;
1582 }