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