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

   1 /*****************************************************************************
   2  * v4l.c : Video4Linux input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Author: Laurent Aimar <fenrir@via.ecp.fr>
   8  *         Paul Forgey <paulf at aphrodite dot com>
   9  *         Gildas Bazin <gbazin@videolan.org>
  10  *         Benjamin Pracht <bigben at videolan dot org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <vlc_common.h>
  36 #include <vlc_plugin.h>
  37 #include <vlc_input.h>
  38 #include <vlc_demux.h>
  39 #include <vlc_access.h>
  40 #include <vlc_vout.h>
  41 #include <vlc_codecs.h>
  42
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45 #include <sys/ioctl.h>
  46 #include <unistd.h>
  47 #include <sys/mman.h>
  48 #include <errno.h>
  49 #include <fcntl.h>
  50
  51 /* From GStreamer's v4l plugin:
  52  * Because of some really cool feature in video4linux1, also known as
  53  * 'not including sys/types.h and sys/time.h', we had to include it
  54  * ourselves. In all their intelligence, these people decided to fix
  55  * this in the next version (video4linux2) in such a cool way that it
  56  * breaks all compilations of old stuff...
  57  * The real problem is actually that linux/time.h doesn't use proper
  58  * macro checks before defining types like struct timeval. The proper
  59  * fix here is to either fuck the kernel header (which is what we do
  60  * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
  61  * upstream, which I'll consider doing later on. If you get compiler
  62  * errors here, check your linux/time.h && sys/time.h header setup.
  63 */
  64 #define _LINUX_TIME_H
  65
  66 #include <linux/videodev.h>
  67 #include "videodev_mjpeg.h"
  68
  69 #include <sys/soundcard.h>
  70
  71 /*****************************************************************************
  72  * Module descriptior
  73  *****************************************************************************/
  74 static int  Open ( vlc_object_t * );
  75 static void Close( vlc_object_t * );
  76
  77 #define CACHING_TEXT N_("Caching value in ms")
  78 #define CACHING_LONGTEXT N_( \
  79     "Caching value for V4L captures. This " \
  80     "value should be set in milliseconds." )
  81 #define VDEV_TEXT N_("Video device name")
  82 #define VDEV_LONGTEXT N_( \
  83     "Name of the video device to use. " \
  84     "If you don't specify anything, no video device will be used.")
  85 #define ADEV_TEXT N_("Audio device name")
  86 #define ADEV_LONGTEXT N_( \
  87     "Name of the audio device to use. " \
  88     "If you don't specify anything, no audio device will be used.")
  89 #define CHROMA_TEXT N_("Video input chroma format")
  90 #define CHROMA_LONGTEXT N_( \
  91     "Force the Video4Linux video device to use a specific chroma format " \
  92     "(eg. I420 (default), RV24, etc.)")
  93 #define FREQUENCY_TEXT N_( "Frequency" )
  94 #define FREQUENCY_LONGTEXT N_( \
  95     "Frequency to capture (in kHz), if applicable." )
  96 #define CHANNEL_TEXT N_( "Channel" )
  97 #define CHANNEL_LONGTEXT N_( \
  98     "Channel of the card to use (Usually, 0 = tuner, " \
  99     "1 = composite, 2 = svideo)." )
 100 #define NORM_TEXT N_( "Norm" )
 101 #define NORM_LONGTEXT N_( \
 102     "Norm of the stream (Automatic, SECAM, PAL, or NTSC)." )
 103 #define AUDIO_TEXT N_( "Audio Channel" )
 104 #define AUDIO_LONGTEXT N_( \
 105     "Audio Channel to use, if there are several audio inputs." )
 106 #define WIDTH_TEXT N_( "Width" )
 107 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
 108     "(-1 for autodetect)." )
 109 #define HEIGHT_TEXT N_( "Height" )
 110 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
 111     "(-1 for autodetect)." )
 112 #define BRIGHTNESS_TEXT N_( "Brightness" )
 113 #define BRIGHTNESS_LONGTEXT N_( \
 114     "Brightness of the video input." )
 115 #define HUE_TEXT N_( "Hue" )
 116 #define HUE_LONGTEXT N_( \
 117     "Hue of the video input." )
 118 #define COLOUR_TEXT N_( "Color" )
 119 #define COLOUR_LONGTEXT N_( \
 120     "Color of the video input." )
 121 #define CONTRAST_TEXT N_( "Contrast" )
 122 #define CONTRAST_LONGTEXT N_( \
 123     "Contrast of the video input." )
 124 #define TUNER_TEXT N_( "Tuner" )
 125 #define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones." )
 126 #define SAMPLERATE_TEXT N_( "Samplerate" )
 127 #define SAMPLERATE_LONGTEXT N_( \
 128     "Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100)" )
 129 #define STEREO_TEXT N_( "Stereo" )
 130 #define STEREO_LONGTEXT N_( \
 131     "Capture the audio stream in stereo." )
 132 #define MJPEG_TEXT N_( "MJPEG" )
 133 #define MJPEG_LONGTEXT N_(  \
 134     "Set this option if the capture device outputs MJPEG" )
 135 #define DECIMATION_TEXT N_( "Decimation" )
 136 #define DECIMATION_LONGTEXT N_( \
 137     "Decimation level for MJPEG streams" )
 138 #define QUALITY_TEXT N_( "Quality" )
 139 #define QUALITY_LONGTEXT N_( "Quality of the stream." )
 140 #define FPS_TEXT N_( "Framerate" )
 141 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
 142     "(-1 for autodetect)." )
 143
 144 static int i_norm_list[] =
 145     { VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
 146 static const char *const psz_norm_list_text[] =
 147     { N_("Automatic"), N_("SECAM"), N_("PAL"),  N_("NTSC") };
 148
 149 vlc_module_begin();
 150     set_shortname( N_("Video4Linux") );
 151     set_description( N_("Video4Linux input") );
 152     set_category( CAT_INPUT );
 153     set_subcategory( SUBCAT_INPUT_ACCESS );
 154
 155     add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
 156                  CACHING_TEXT, CACHING_LONGTEXT, true );
 157     add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
 158                 false );
 159     add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
 160                 false );
 161     add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 162                 true );
 163     add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, true );
 164     add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
 165                 SAMPLERATE_LONGTEXT, true );
 166     add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
 167                 true );
 168     add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, true );
 169     add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
 170                 false );
 171         change_integer_list( i_norm_list, psz_norm_list_text, 0 );
 172     add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
 173                 false );
 174     add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, true );
 175     add_bool( "v4l-stereo", true, NULL, STEREO_TEXT, STEREO_LONGTEXT,
 176             true );
 177     add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, true );
 178     add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
 179                 true );
 180     add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
 181                 BRIGHTNESS_LONGTEXT, true );
 182     add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
 183                 true );
 184     add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, true );
 185     add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
 186                 true );
 187     add_bool( "v4l-mjpeg", false, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
 188             true );
 189     add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
 190             DECIMATION_LONGTEXT, true );
 191     add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
 192             true );
 193
 194     add_shortcut( "v4l" );
 195     set_capability( "access_demux", 10 );
 196     set_callbacks( Open, Close );
 197 vlc_module_end();
 198
 199 /*****************************************************************************
 200  * Access: local prototypes
 201  *****************************************************************************/
 202 static int Demux  ( demux_t * );
 203 static int Control( demux_t *, int, va_list );
 204
 205 static void ParseMRL    ( demux_t * );
 206 static int  OpenVideoDev( demux_t *, char * );
 207 static int  OpenAudioDev( demux_t *, char * );
 208
 209 static block_t *GrabAudio( demux_t * );
 210 static block_t *GrabVideo( demux_t * );
 211
 212 #define MJPEG_BUFFER_SIZE (256*1024)
 213
 214 struct quicktime_mjpeg_app1
 215 {
 216     uint32_t    i_reserved;             /* set to 0 */
 217     uint32_t    i_tag;                  /* 'mjpg' */
 218     uint32_t    i_field_size;           /* offset following EOI */
 219     uint32_t    i_padded_field_size;    /* offset following EOI+pad */
 220     uint32_t    i_next_field;           /* offset to next field */
 221     uint32_t    i_DQT_offset;
 222     uint32_t    i_DHT_offset;
 223     uint32_t    i_SOF_offset;
 224     uint32_t    i_SOS_offset;
 225     uint32_t    i_data_offset;          /* following SOS marker data */
 226 };
 227
 228 static struct
 229 {
 230     int i_v4l;
 231     int i_fourcc;
 232
 233 } v4lchroma_to_fourcc[] =
 234 {
 235     { VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
 236     { VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
 237     { VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
 238     { VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
 239     { VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
 240     { VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
 241     { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
 242     { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
 243     { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
 244     { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
 245     { VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
 246     { VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
 247     { VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
 248     { VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
 249     { VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
 250     { VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
 251     { VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
 252     { 0, 0 }
 253 };
 254
 255 struct demux_sys_t
 256 {
 257     /* Devices */
 258     char *psz_device;         /* Main device from MRL, can be video or audio */
 259
 260     char *psz_vdev;
 261     int  fd_video;
 262
 263     char *psz_adev;
 264     int  fd_audio;
 265
 266     /* Video properties */
 267     picture_t pic;
 268
 269     int i_fourcc;
 270     int i_channel;
 271     int i_audio;
 272     int i_norm;
 273     int i_tuner;
 274     int i_frequency;
 275     int i_width;
 276     int i_height;
 277
 278     int i_brightness;
 279     int i_hue;
 280     int i_colour;
 281     int i_contrast;
 282
 283     float f_fps;            /* <= 0.0 mean to grab at full rate */
 284     mtime_t i_video_pts;    /* only used when f_fps > 0 */
 285
 286     bool b_mjpeg;
 287     int i_decimation;
 288     int i_quality;
 289
 290     struct video_capability vid_cap;
 291     struct video_mbuf       vid_mbuf;
 292     struct mjpeg_requestbuffers mjpeg_buffers;
 293
 294     uint8_t *p_video_mmap;
 295     int     i_frame_pos;
 296
 297     struct video_mmap   vid_mmap;
 298     struct video_picture vid_picture;
 299
 300     int          i_video_frame_size;
 301     es_out_id_t  *p_es_video;
 302
 303     /* Audio properties */
 304     vlc_fourcc_t i_acodec_raw;
 305     int          i_sample_rate;
 306     bool   b_stereo;
 307     int          i_audio_max_frame_size;
 308     block_t      *p_block_audio;
 309     es_out_id_t  *p_es_audio;
 310 };
 311
 312 /*****************************************************************************
 313  * Open: opens v4l device
 314  *****************************************************************************
 315  *
 316  * url: <video device>::::
 317  *
 318  *****************************************************************************/
 319 static int Open( vlc_object_t *p_this )
 320 {
 321     demux_t     *p_demux = (demux_t*)p_this;
 322     demux_sys_t *p_sys;
 323     vlc_value_t val;
 324
 325     /* Only when selected */
 326     if( *p_demux->psz_access == '\0' )
 327         return VLC_EGENERIC;
 328
 329     /* Set up p_demux */
 330     p_demux->pf_demux = Demux;
 331     p_demux->pf_control = Control;
 332     p_demux->info.i_update = 0;
 333     p_demux->info.i_title = 0;
 334     p_demux->info.i_seekpoint = 0;
 335     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 336     memset( p_sys, 0, sizeof( demux_sys_t ) );
 337
 338     var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 339     var_Get( p_demux, "v4l-audio", &val );
 340     p_sys->i_audio          = val.i_int;
 341
 342     var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 343     var_Get( p_demux, "v4l-channel", &val );
 344     p_sys->i_channel        = val.i_int;
 345
 346     var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 347     var_Get( p_demux, "v4l-norm", &val );
 348     p_sys->i_norm           = val.i_int;
 349
 350     var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 351     var_Get( p_demux, "v4l-tuner", &val );
 352     p_sys->i_tuner          = val.i_int;
 353
 354     var_Create( p_demux, "v4l-frequency",
 355                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 356     var_Get( p_demux, "v4l-frequency", &val );
 357     p_sys->i_frequency      = val.i_int;
 358
 359     var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 360     var_Get( p_demux, "v4l-fps", &val );
 361     p_sys->f_fps            = val.f_float;
 362
 363     var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 364     var_Get( p_demux, "v4l-width", &val );
 365     p_sys->i_width          = val.i_int;
 366
 367     var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 368     var_Get( p_demux, "v4l-height", &val );
 369     p_sys->i_height         = val.i_int;
 370
 371     p_sys->i_video_pts      = -1;
 372
 373     var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
 374                                                         VLC_VAR_DOINHERIT );
 375     var_Get( p_demux, "v4l-brightness", &val );
 376     p_sys->i_brightness     = val.i_int;
 377
 378     var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 379     var_Get( p_demux, "v4l-hue", &val );
 380     p_sys->i_hue            = -1;
 381
 382     var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 383     var_Get( p_demux, "v4l-colour", &val );
 384     p_sys->i_colour         = val.i_int;
 385
 386     var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 387     var_Get( p_demux, "v4l-contrast", &val );
 388     p_sys->i_contrast       = val.i_int;
 389
 390     var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 391     var_Get( p_demux, "v4l-mjpeg", &val );
 392     p_sys->b_mjpeg     = val.b_bool;
 393
 394     var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
 395                                                             VLC_VAR_DOINHERIT );
 396     var_Get( p_demux, "v4l-decimation", &val );
 397     p_sys->i_decimation = val.i_int;
 398
 399     var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 400     var_Get( p_demux, "v4l-quality", &val );
 401     p_sys->i_quality = val.i_int;
 402
 403     var_Create( p_demux, "v4l-samplerate",
 404                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 405     var_Get( p_demux, "v4l-samplerate", &val );
 406     p_sys->i_sample_rate  = val.i_int;
 407
 408     var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 409     var_Get( p_demux, "v4l-stereo", &val );
 410     p_sys->b_stereo       = val.b_bool;
 411
 412     p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
 413     p_sys->fd_video = -1;
 414     p_sys->fd_audio = -1;
 415
 416     p_sys->p_es_video = p_sys->p_es_audio = 0;
 417     p_sys->p_block_audio = 0;
 418
 419     ParseMRL( p_demux );
 420
 421     /* Find main device (video or audio) */
 422     if( p_sys->psz_device && *p_sys->psz_device )
 423     {
 424         msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
 425
 426         /* Try to open as video device */
 427         p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
 428
 429         if( p_sys->fd_video < 0 )
 430         {
 431             /* Try to open as audio device */
 432             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
 433             if( p_sys->fd_audio >= 0 )
 434             {
 435                 free( p_sys->psz_adev );
 436                 p_sys->psz_adev = p_sys->psz_device;
 437                 p_sys->psz_device = NULL;
 438             }
 439         }
 440         else
 441         {
 442             free( p_sys->psz_vdev );
 443             p_sys->psz_vdev = p_sys->psz_device;
 444             p_sys->psz_device = NULL;
 445         }
 446     }
 447
 448     /* If no device opened, only continue if the access was forced */
 449     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 450     {
 451         if( strcmp( p_demux->psz_access, "v4l" ) )
 452         {
 453             Close( p_this );
 454             return VLC_EGENERIC;
 455         }
 456     }
 457
 458     /* Find video device */
 459     if( p_sys->fd_video < 0 )
 460     {
 461         if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
 462         {
 463             free( p_sys->psz_vdev );
 464             p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
 465         }
 466
 467         if( p_sys->psz_vdev && *p_sys->psz_vdev )
 468         {
 469             p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
 470         }
 471     }
 472
 473     /* Find audio device */
 474     if( p_sys->fd_audio < 0 )
 475     {
 476         if( !p_sys->psz_adev || !*p_sys->psz_adev )
 477         {
 478             free( p_sys->psz_adev );
 479             p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
 480         }
 481
 482         if( p_sys->psz_adev && *p_sys->psz_adev )
 483         {
 484             p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
 485         }
 486     }
 487
 488     if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
 489     {
 490         Close( p_this );
 491         return VLC_EGENERIC;
 492     }
 493
 494     msg_Dbg( p_demux, "v4l grabbing started" );
 495
 496     /* Declare elementary streams */
 497     if( p_sys->fd_video >= 0 )
 498     {
 499         es_format_t fmt;
 500         es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
 501         fmt.video.i_width  = p_sys->i_width;
 502         fmt.video.i_height = p_sys->i_height;
 503         fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
 504
 505         /* Setup rgb mask for RGB formats */
 506         if( p_sys->i_fourcc == VLC_FOURCC('R','V','2','4') )
 507         {
 508             /* This is in BGR format */
 509             fmt.video.i_bmask = 0x00ff0000;
 510             fmt.video.i_gmask = 0x0000ff00;
 511             fmt.video.i_rmask = 0x000000ff;
 512         }
 513
 514         msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
 515                  (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
 516         p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
 517     }
 518
 519     if( p_sys->fd_audio >= 0 )
 520     {
 521         es_format_t fmt;
 522         es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
 523
 524         fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
 525         fmt.audio.i_rate = p_sys->i_sample_rate;
 526         fmt.audio.i_bitspersample = 16; // FIXME ?
 527         fmt.audio.i_blockalign = fmt.audio.i_channels *
 528             fmt.audio.i_bitspersample / 8;
 529         fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
 530             fmt.audio.i_bitspersample;
 531
 532         msg_Dbg( p_demux, "new audio es %d channels %dHz",
 533                  fmt.audio.i_channels, fmt.audio.i_rate );
 534
 535         p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
 536     }
 537
 538     /* Update default_pts to a suitable value for access */
 539     var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 540
 541     return VLC_SUCCESS;
 542 }
 543
 544 /*****************************************************************************
 545  * Close: close device, free resources
 546  *****************************************************************************/
 547 static void Close( vlc_object_t *p_this )
 548 {
 549     demux_t     *p_demux = (demux_t *)p_this;
 550     demux_sys_t *p_sys   = p_demux->p_sys;
 551
 552     free( p_sys->psz_device );
 553     free( p_sys->psz_vdev );
 554     free( p_sys->psz_adev );
 555     if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
 556     if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
 557     if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
 558
 559     if( p_sys->b_mjpeg )
 560     {
 561         int i_noframe = -1;
 562         ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
 563     }
 564
 565     if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
 566     {
 567         if( p_sys->b_mjpeg )
 568             munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
 569                     p_sys->mjpeg_buffers.count );
 570         else
 571             munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
 572     }
 573
 574     free( p_sys );
 575 }
 576
 577 /*****************************************************************************
 578  * Control:
 579  *****************************************************************************/
 580 static int Control( demux_t *p_demux, int i_query, va_list args )
 581 {
 582     bool *pb;
 583     int64_t    *pi64;
 584
 585     switch( i_query )
 586     {
 587         /* Special for access_demux */
 588         case DEMUX_CAN_PAUSE:
 589         case DEMUX_CAN_SEEK:
 590         case DEMUX_SET_PAUSE_STATE:
 591         case DEMUX_CAN_CONTROL_PACE:
 592             pb = (bool*)va_arg( args, bool * );
 593             *pb = false;
 594             return VLC_SUCCESS;
 595
 596         case DEMUX_GET_PTS_DELAY:
 597             pi64 = (int64_t*)va_arg( args, int64_t * );
 598             *pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
 599             return VLC_SUCCESS;
 600
 601         case DEMUX_GET_TIME:
 602             pi64 = (int64_t*)va_arg( args, int64_t * );
 603             *pi64 = mdate();
 604             return VLC_SUCCESS;
 605
 606         /* TODO implement others */
 607         default:
 608             return VLC_EGENERIC;
 609     }
 610
 611     return VLC_EGENERIC;
 612 }
 613
 614 /*****************************************************************************
 615  * Demux:
 616  *****************************************************************************/
 617 static int Demux( demux_t *p_demux )
 618 {
 619     demux_sys_t *p_sys = p_demux->p_sys;
 620     es_out_id_t  *p_es = p_sys->p_es_audio;
 621     block_t *p_block = NULL;
 622
 623     /* Try grabbing audio frames first */
 624     if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
 625     {
 626         /* Try grabbing video frame */
 627         p_es = p_sys->p_es_video;
 628         if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
 629     }
 630
 631     if( !p_block )
 632     {
 633         /* Sleep so we do not consume all the cpu, 10ms seems
 634          * like a good value (100fps) */
 635         msleep( 10000 );
 636         return 1;
 637     }
 638
 639     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
 640     es_out_Send( p_demux->out, p_es, p_block );
 641
 642     return 1;
 643 }
 644
 645 /*****************************************************************************
 646  * ParseMRL: parse the options contained in the MRL
 647  *****************************************************************************/
 648 static void ParseMRL( demux_t *p_demux )
 649 {
 650     demux_sys_t *p_sys = p_demux->p_sys;
 651
 652     char *psz_dup = strdup( p_demux->psz_path );
 653     char *psz_parser = psz_dup;
 654
 655     while( *psz_parser && *psz_parser != ':' )
 656     {
 657         psz_parser++;
 658     }
 659
 660     if( *psz_parser == ':' )
 661     {
 662         /* read options */
 663         for( ;; )
 664         {
 665             *psz_parser++ = '\0';
 666             if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
 667             {
 668                 p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
 669                                            &psz_parser, 0 );
 670             }
 671             else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
 672             {
 673                 psz_parser += strlen( "norm=" );
 674                 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
 675                 {
 676                     p_sys->i_norm = VIDEO_MODE_PAL;
 677                     psz_parser += strlen( "pal" );
 678                 }
 679                 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
 680                 {
 681                     p_sys->i_norm = VIDEO_MODE_NTSC;
 682                     psz_parser += strlen( "ntsc" );
 683                 }
 684                 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
 685                 {
 686                     p_sys->i_norm = VIDEO_MODE_SECAM;
 687                     psz_parser += strlen( "secam" );
 688                 }
 689                 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
 690                 {
 691                     p_sys->i_norm = VIDEO_MODE_AUTO;
 692                     psz_parser += strlen( "auto" );
 693                 }
 694                 else
 695                 {
 696                     p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
 697                 }
 698             }
 699             else if( !strncmp( psz_parser, "frequency=",
 700                                strlen( "frequency=" ) ) )
 701             {
 702                 p_sys->i_frequency =
 703                     strtol( psz_parser + strlen( "frequency=" ),
 704                             &psz_parser, 0 );
 705                 if( p_sys->i_frequency < 30000 )
 706                 {
 707                     msg_Warn( p_demux, "v4l syntax has changed : "
 708                               "'frequency' is now channel frequency in kHz");
 709                 }
 710             }
 711             else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
 712             {
 713                 p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
 714                                          &psz_parser, 0 );
 715             }
 716             else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
 717             {
 718                 psz_parser += strlen( "size=" );
 719                 if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
 720                 {
 721                     p_sys->i_width  = 128;
 722                     p_sys->i_height = 96;
 723                 }
 724                 else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
 725                 {
 726                     p_sys->i_width  = 160;
 727                     p_sys->i_height = 120;
 728                 }
 729                 else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
 730                 {
 731                     p_sys->i_width  = 176;
 732                     p_sys->i_height = 144;
 733                 }
 734                 else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
 735                 {
 736                     p_sys->i_width  = 320;
 737                     p_sys->i_height = 244;
 738                 }
 739                 else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
 740                 {
 741                     p_sys->i_width  = 352;
 742                     p_sys->i_height = 288;
 743                 }
 744                 else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
 745                 {
 746                     p_sys->i_width  = 640;
 747                     p_sys->i_height = 480;
 748                 }
 749                 else
 750                 {
 751                     /* widthxheight */
 752                     p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
 753                     if( *psz_parser == 'x' || *psz_parser == 'X')
 754                     {
 755                         p_sys->i_height = strtol( psz_parser + 1,
 756                                                   &psz_parser, 0 );
 757                     }
 758                     msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
 759                              p_sys->i_height );
 760                 }
 761             }
 762             else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
 763             {
 764                 p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
 765                                               &psz_parser, 0 );
 766             }
 767             else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
 768             {
 769                 p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
 770                                           &psz_parser, 0 );
 771             }
 772             else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
 773             {
 774                 p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
 775                                        &psz_parser, 0 );
 776             }
 777             else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
 778             {
 779                 p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
 780                                             &psz_parser, 0 );
 781             }
 782             else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
 783             {
 784                 p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
 785                                          &psz_parser, 0 );
 786             }
 787             else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
 788             {
 789                 int  i_len;
 790
 791                 psz_parser += strlen( "adev=" );
 792                 if( strchr( psz_parser, ':' ) )
 793                 {
 794                     i_len = strchr( psz_parser, ':' ) - psz_parser;
 795                 }
 796                 else
 797                 {
 798                     i_len = strlen( psz_parser );
 799                 }
 800
 801                 p_sys->psz_adev = strndup( psz_parser, i_len );
 802
 803                 psz_parser += i_len;
 804             }
 805             else if( !strncmp( psz_parser, "samplerate=",
 806                                strlen( "samplerate=" ) ) )
 807             {
 808                 p_sys->i_sample_rate =
 809                     strtol( psz_parser + strlen( "samplerate=" ),
 810                             &psz_parser, 0 );
 811             }
 812             else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
 813             {
 814                 psz_parser += strlen( "stereo" );
 815
 816                 p_sys->b_stereo = true;
 817             }
 818             else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
 819             {
 820                 psz_parser += strlen( "mono" );
 821
 822                 p_sys->b_stereo = false;
 823             }
 824             else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
 825             {
 826                 psz_parser += strlen( "mjpeg" );
 827
 828                 p_sys->b_mjpeg = true;
 829             }
 830             else if( !strncmp( psz_parser, "decimation=",
 831                         strlen( "decimation=" ) ) )
 832             {
 833                 p_sys->i_decimation =
 834                     strtol( psz_parser + strlen( "decimation=" ),
 835                             &psz_parser, 0 );
 836             }
 837             else if( !strncmp( psz_parser, "quality=",
 838                         strlen( "quality=" ) ) )
 839             {
 840                 p_sys->i_quality =
 841                     strtol( psz_parser + strlen( "quality=" ),
 842                             &psz_parser, 0 );
 843             }
 844             else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
 845             {
 846                 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
 847                                        &psz_parser );
 848             }
 849             else
 850             {
 851                 msg_Warn( p_demux, "unknown option" );
 852             }
 853
 854             while( *psz_parser && *psz_parser != ':' )
 855             {
 856                 psz_parser++;
 857             }
 858
 859             if( *psz_parser == '\0' )
 860             {
 861                 break;
 862             }
 863         }
 864     }
 865
 866     if( *psz_dup )
 867     {
 868         p_sys->psz_device = strdup( psz_dup );
 869     }
 870     free( psz_dup );
 871 }
 872
 873 /*****************************************************************************
 874  * OpenVideoDev:
 875  *****************************************************************************/
 876 static int OpenVideoDev( demux_t *p_demux, char *psz_device )
 877 {
 878     demux_sys_t *p_sys = p_demux->p_sys;
 879     int i_fd;
 880
 881     struct video_channel vid_channel;
 882     struct mjpeg_params mjpeg;
 883     int i;
 884
 885     if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
 886     {
 887         msg_Err( p_demux, "cannot open device (%m)" );
 888         goto vdev_failed;
 889     }
 890
 891     if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
 892     {
 893         msg_Err( p_demux, "cannot get capabilities (%m)" );
 894         goto vdev_failed;
 895     }
 896
 897     msg_Dbg( p_demux,
 898              "V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
 899              p_sys->vid_cap.name,
 900              p_sys->vid_cap.channels,
 901              p_sys->vid_cap.audios,
 902              p_sys->vid_cap.minwidth,  p_sys->vid_cap.maxwidth,
 903              p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
 904
 905     if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
 906     {
 907         msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
 908         p_sys->i_channel = 0;
 909     }
 910     if( p_sys->vid_cap.audios && p_sys->i_audio >= p_sys->vid_cap.audios )
 911     {
 912         msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
 913         p_sys->i_audio = -1;
 914     }
 915
 916     if( p_sys->i_width < p_sys->vid_cap.minwidth ||
 917         p_sys->i_width > p_sys->vid_cap.maxwidth )
 918     {
 919         msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
 920         p_sys->i_width = 0;
 921     }
 922     if( p_sys->i_height < p_sys->vid_cap.minheight ||
 923         p_sys->i_height > p_sys->vid_cap.maxheight )
 924     {
 925         msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
 926         p_sys->i_height = 0;
 927     }
 928
 929     if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
 930     {
 931         msg_Err( p_demux, "cannot grab" );
 932         goto vdev_failed;
 933     }
 934
 935     vid_channel.channel = p_sys->i_channel;
 936     if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
 937     {
 938         msg_Err( p_demux, "cannot get channel infos (%m)" );
 939         goto vdev_failed;
 940     }
 941     msg_Dbg( p_demux,
 942              "setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
 943              vid_channel.name, vid_channel.channel, vid_channel.tuners,
 944              vid_channel.flags, vid_channel.type, vid_channel.norm );
 945
 946     if( p_sys->i_tuner >= vid_channel.tuners )
 947     {
 948         msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
 949         p_sys->i_tuner = 0;
 950     }
 951
 952     vid_channel.norm = p_sys->i_norm;
 953     if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
 954     {
 955         msg_Err( p_demux, "cannot set channel (%m)" );
 956         goto vdev_failed;
 957     }
 958
 959     if( vid_channel.flags & VIDEO_VC_TUNER )
 960     {
 961
 962         /* set tuner */
 963 #if 0
 964         struct video_tuner vid_tuner;
 965         if( p_sys->i_tuner >= 0 )
 966         {
 967             vid_tuner.tuner = p_sys->i_tuner;
 968             if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
 969             {
 970                 msg_Err( p_demux, "cannot get tuner (%m)" );
 971                 goto vdev_failed;
 972             }
 973             msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
 974                      "mode=0x%x signal=0x%x",
 975                      vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
 976                      vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
 977
 978             msg_Dbg( p_demux, "setting tuner %s (%d)",
 979                      vid_tuner.name, vid_tuner.tuner );
 980
 981             /* FIXME FIXME to be checked FIXME FIXME */
 982             //vid_tuner.mode = p_sys->i_norm;
 983             if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
 984             {
 985                 msg_Err( p_demux, "cannot set tuner (%m)" );
 986                 goto vdev_failed;
 987             }
 988         }
 989 #endif
 990
 991         /* Show a warning if frequency is < than 30000.
 992          * User is certainly usint old syntax. */
 993
 994
 995         /* set frequency */
 996         if( p_sys->i_frequency >= 0 )
 997         {
 998             int driver_frequency = p_sys->i_frequency * 16 /1000;
 999             if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
1000             {
1001                 msg_Err( p_demux, "cannot set frequency (%m)" );
1002                 goto vdev_failed;
1003             }
1004             msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1005                                                    driver_frequency );
1006         }
1007     }
1008
1009     /* set audio */
1010     if( vid_channel.flags & VIDEO_VC_AUDIO )
1011     {
1012         struct video_audio      vid_audio;
1013
1014         /* XXX TODO volume, balance, ... */
1015         if( p_sys->i_audio >= 0 )
1016         {
1017             vid_audio.audio = p_sys->i_audio;
1018             if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1019             {
1020                 msg_Err( p_demux, "cannot get audio (%m)" );
1021                 goto vdev_failed;
1022             }
1023
1024             /* unmute audio */
1025             vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1026
1027             if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1028             {
1029                 msg_Err( p_demux, "cannot set audio (%m)" );
1030                 goto vdev_failed;
1031             }
1032         }
1033
1034     }
1035
1036     /* establish basic params with input and norm before feeling width
1037      * or height */
1038     if( p_sys->b_mjpeg )
1039     {
1040         struct quicktime_mjpeg_app1 *p_app1;
1041         int32_t i_offset;
1042
1043         if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1044         {
1045             msg_Err( p_demux, "cannot get mjpeg params (%m)" );
1046             goto vdev_failed;
1047         }
1048         mjpeg.input = p_sys->i_channel;
1049         mjpeg.norm  = p_sys->i_norm;
1050         mjpeg.decimation = p_sys->i_decimation;
1051
1052         if( p_sys->i_width )
1053             mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1054         if( p_sys->i_height )
1055             mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1056
1057         /* establish Quicktime APP1 marker while we are here */
1058         mjpeg.APPn = 1;
1059         mjpeg.APP_len = 40;
1060
1061         /* aligned */
1062         p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1063         p_app1->i_reserved = 0;
1064         p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1065         p_app1->i_field_size = 0;
1066         p_app1->i_padded_field_size = 0;
1067         p_app1->i_next_field = 0;
1068         /* XXX WARNING XXX */
1069         /* these's nothing magic about these values.  We are dangerously
1070          * assuming the encoder card is encoding mjpeg-a and is not throwing
1071          * in marker tags we aren't expecting.  It's bad enough we have to
1072          * search through the jpeg output for every frame we grab just to
1073          * find the first field's end marker, so we take this risk to boost
1074          * performance.
1075          * This is really something the driver could do for us because this
1076          * does conform to standards outside of Apple Quicktime.
1077          */
1078         i_offset = 0x2e;
1079         p_app1->i_DQT_offset = hton32( i_offset );
1080         i_offset = 0xb4;
1081         p_app1->i_DHT_offset = hton32( i_offset );
1082         i_offset = 0x258;
1083         p_app1->i_SOF_offset = hton32( i_offset );
1084         i_offset = 0x26b;
1085         p_app1->i_SOS_offset = hton32( i_offset );
1086         i_offset = 0x279;
1087         p_app1->i_data_offset = hton32( i_offset );
1088
1089         /* SOF and SOS aren't specified by the mjpeg API because they aren't
1090          * optional.  They will be present in the output. */
1091         mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1092
1093         if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1094         {
1095             msg_Err( p_demux, "cannot set mjpeg params (%m)" );
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 (%m)" );
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             p_sys->i_fourcc = 0;
1177
1178             psz = var_CreateGetString( p_demux, "v4l-chroma" );
1179             if( strlen( psz ) >= 4 )
1180             {
1181                 vid_picture.palette = 0;
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 (%m)" );
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                  "(%m)" );
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 (%m)" );
1358         goto adev_fail;
1359     }
1360
1361     if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1362                &p_sys->i_sample_rate ) < 0 )
1363     {
1364         msg_Err( p_demux, "cannot set audio sample rate (%m)" );
1365         goto adev_fail;
1366     }
1367
1368     msg_Dbg( p_demux, "opened adev=`%s' %s %dHz",
1369              psz_device, p_sys->b_stereo ? "stereo" : "mono",
1370              p_sys->i_sample_rate );
1371
1372     p_sys->i_audio_max_frame_size = 6 * 1024;
1373
1374     return i_fd;
1375
1376  adev_fail:
1377
1378     if( i_fd >= 0 ) close( i_fd );
1379     return -1;
1380 }
1381
1382 /*****************************************************************************
1383  * GrabAudio: grab audio
1384  *****************************************************************************/
1385 static block_t *GrabAudio( demux_t *p_demux )
1386 {
1387     demux_sys_t *p_sys = p_demux->p_sys;
1388     struct audio_buf_info buf_info;
1389     int i_read, i_correct;
1390     block_t *p_block;
1391
1392     if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
1393     else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
1394
1395     if( !p_block )
1396     {
1397         msg_Warn( p_demux, "cannot get block" );
1398         return 0;
1399     }
1400
1401     p_sys->p_block_audio = p_block;
1402
1403     i_read = read( p_sys->fd_audio, p_block->p_buffer,
1404                    p_sys->i_audio_max_frame_size );
1405
1406     if( i_read <= 0 ) return 0;
1407
1408     p_block->i_buffer = i_read;
1409     p_sys->p_block_audio = 0;
1410
1411     /* Correct the date because of kernel buffering */
1412     i_correct = i_read;
1413     if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
1414     {
1415         i_correct += buf_info.bytes;
1416     }
1417
1418     p_block->i_pts = p_block->i_dts =
1419         mdate() - INT64_C(1000000) * (mtime_t)i_correct /
1420         2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
1421
1422     return p_block;
1423 }
1424
1425 /*****************************************************************************
1426  * GrabVideo:
1427  *****************************************************************************/
1428 static uint8_t *GrabCapture( demux_t *p_demux )
1429 {
1430     demux_sys_t *p_sys = p_demux->p_sys;
1431     int i_captured_frame = p_sys->i_frame_pos;
1432
1433     p_sys->vid_mmap.frame = (p_sys->i_frame_pos + 1) % p_sys->vid_mbuf.frames;
1434
1435     while( ioctl( p_sys->fd_video, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1436     {
1437         if( errno != EAGAIN )
1438         {
1439             msg_Err( p_demux, "failed capturing new frame" );
1440             return NULL;
1441         }
1442
1443         if( !vlc_object_alive (p_demux) )
1444         {
1445             return NULL;
1446         }
1447
1448         msg_Dbg( p_demux, "grab failed, trying again" );
1449     }
1450
1451     while( ioctl(p_sys->fd_video, VIDIOCSYNC, &p_sys->i_frame_pos) < 0 )
1452     {
1453         if( errno != EAGAIN && errno != EINTR )
1454         {
1455             msg_Err( p_demux, "failed syncing new frame" );
1456             return NULL;
1457         }
1458     }
1459
1460     p_sys->i_frame_pos = p_sys->vid_mmap.frame;
1461     /* leave i_video_frame_size alone */
1462     return p_sys->p_video_mmap + p_sys->vid_mbuf.offsets[i_captured_frame];
1463 }
1464
1465 static uint8_t *GrabMJPEG( demux_t *p_demux )
1466 {
1467     demux_sys_t *p_sys = p_demux->p_sys;
1468     struct mjpeg_sync sync;
1469     uint8_t *p_frame, *p_field, *p;
1470     uint16_t tag;
1471     uint32_t i_size;
1472     struct quicktime_mjpeg_app1 *p_app1 = NULL;
1473
1474     /* re-queue the last frame we sync'd */
1475     if( p_sys->i_frame_pos != -1 )
1476     {
1477         while( ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT,
1478                                        &p_sys->i_frame_pos ) < 0 )
1479         {
1480             if( errno != EAGAIN && errno != EINTR )
1481             {
1482                 msg_Err( p_demux, "failed capturing new frame" );
1483                 return NULL;
1484             }
1485         }
1486     }
1487
1488     /* sync on the next frame */
1489     while( ioctl( p_sys->fd_video, MJPIOC_SYNC, &sync ) < 0 )
1490     {
1491         if( errno != EAGAIN && errno != EINTR )
1492         {
1493             msg_Err( p_demux, "failed syncing new frame" );
1494             return NULL;
1495         }
1496     }
1497
1498     p_sys->i_frame_pos = sync.frame;
1499     p_frame = p_sys->p_video_mmap + p_sys->mjpeg_buffers.size * sync.frame;
1500
1501     /* p_frame now points to the data.  fix up the Quicktime APP1 marker */
1502     tag = 0xffd9;
1503     tag = hton16( tag );
1504     p_field = p_frame;
1505
1506     /* look for EOI */
1507     p = memmem( p_field, sync.length, &tag, 2 );
1508
1509     if( p )
1510     {
1511         p += 2; /* data immediately following EOI */
1512         /* UNALIGNED! */
1513         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1514
1515         i_size = ((uint32_t)(p - p_field));
1516         i_size = hton32( i_size );
1517         memcpy( &p_app1->i_field_size, &i_size, 4 );
1518
1519         while( *p == 0xff && *(p+1) == 0xff )
1520             p++;
1521
1522         i_size = ((uint32_t)(p - p_field));
1523         i_size = hton32( i_size );
1524         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1525     }
1526
1527     tag = 0xffd8;
1528     tag = hton16( tag );
1529     p_field = memmem( p, sync.length - (size_t)(p - p_frame), &tag, 2 );
1530
1531     if( p_field )
1532     {
1533         i_size = (uint32_t)(p_field - p_frame);
1534         i_size = hton32( i_size );
1535         memcpy( &p_app1->i_next_field, &i_size, 4 );
1536
1537         /* UNALIGNED! */
1538         p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1539         tag = 0xffd9;
1540         tag = hton16( tag );
1541         p = memmem( p_field, sync.length - (size_t)(p_field - p_frame),
1542                 &tag, 2 );
1543
1544         if( !p )
1545         {
1546             /* sometimes the second field doesn't have the EOI.  just put it
1547              * there
1548              */
1549             p = p_frame + sync.length;
1550             memcpy( p, &tag, 2 );
1551             sync.length += 2;
1552         }
1553
1554         p += 2;
1555         i_size = (uint32_t)(p - p_field);
1556         i_size = hton32( i_size );
1557         memcpy( &p_app1->i_field_size, &i_size, 4 );
1558         i_size = (uint32_t)(sync.length - (uint32_t)(p_field - p_frame));
1559         i_size = hton32( i_size );
1560         memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1561     }
1562
1563     p_sys->i_video_frame_size = sync.length;
1564     return p_frame;
1565 }
1566
1567 static block_t *GrabVideo( demux_t *p_demux )
1568 {
1569     demux_sys_t *p_sys = p_demux->p_sys;
1570     uint8_t     *p_frame;
1571     block_t     *p_block;
1572
1573     if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1574     {
1575         mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1576
1577         /* Did we wait long enough ? (frame rate reduction) */
1578         if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1579     }
1580
1581     if( p_sys->b_mjpeg ) p_frame = GrabMJPEG( p_demux );
1582     else p_frame = GrabCapture( p_demux );
1583
1584     if( !p_frame ) return 0;
1585
1586     if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
1587     {
1588         msg_Warn( p_demux, "cannot get block" );
1589         return 0;
1590     }
1591
1592     memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
1593     p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1594
1595     return p_block;
1596 }