git.sesse.net Git - vlc/blob - modules/access/dc1394.c

   1 /*****************************************************************************
   2  * dc1394.c: firewire input module
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  *
   6  * Authors: Xant Majere <xant@xant.net>
   7  *
   8  *****************************************************************************
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation;
  12  * version 2 of the License.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc_input.h>
  35 #include <vlc_vout.h>
  36 #include <vlc_demux.h>
  37
  38
  39 #ifdef HAVE_FCNTL_H
  40 #   include <fcntl.h>
  41 #endif
  42 #ifdef HAVE_UNISTD_H
  43 #   include <unistd.h>
  44 #elif defined( WIN32 ) && !defined( UNDER_CE )
  45 #   include <io.h>
  46 #endif
  47
  48 #include <sys/ioctl.h>
  49 #include <sys/soundcard.h>
  50
  51 #include <libraw1394/raw1394.h>
  52 #include <libdc1394/dc1394_control.h>
  53
  54 #define MAX_IEEE1394_HOSTS 32
  55 #define MAX_CAMERA_NODES 32
  56
  57 /*****************************************************************************
  58  * Module descriptor
  59  *****************************************************************************/
  60 static int  Open ( vlc_object_t * );
  61 static void Close( vlc_object_t * );
  62 static void OpenAudioDev( demux_t *p_demux );
  63 static inline void CloseAudioDev( demux_t *p_demux );
  64
  65 vlc_module_begin();
  66     set_description( _("dc1394 input") );
  67     set_capability( "access_demux", 10 );
  68     add_shortcut( "dc1394" );
  69     set_callbacks( Open, Close );
  70 vlc_module_end();
  71
  72 typedef struct __dc_camera
  73 {
  74     int port;
  75     nodeid_t node;
  76     u_int64_t uid;
  77 } dc_camera;
  78
  79 typedef struct demux_sys_t
  80 {
  81     dc1394_cameracapture camera;
  82     picture_t            pic;
  83     int                  dma_capture;
  84 #define DMA_OFF 0
  85 #define DMA_ON 1
  86     int                 num_ports;
  87     int                 num_cameras;
  88     int                 selected_camera;
  89     u_int64_t           selected_uid;
  90
  91     dc_camera           *camera_nodes;
  92     dc1394_camerainfo   camera_info;
  93     dc1394_miscinfo     misc_info;
  94     raw1394handle_t     fd_video;
  95     quadlet_t           supported_framerates;
  96
  97     int                 width;
  98     int                 height;
  99     int                 frame_size;
 100     int                 frame_rate;
 101     unsigned int        brightness;
 102     unsigned int        focus;
 103     char                *dma_device;
 104     es_out_id_t         *p_es_video;
 105
 106     /* audio stuff */
 107     int                 i_sample_rate;
 108     int                 channels;
 109     int                 i_audio_max_frame_size;
 110     int                 fd_audio;
 111     char                *audio_device;
 112 #define NO_ROTATION 0
 113 #define ROTATION_LEFT 1
 114 #define ROTATION_RIGHT 2
 115     es_out_id_t         *p_es_audio;
 116 } dc1394_sys;
 117
 118 /*****************************************************************************
 119  * Local prototypes
 120  *****************************************************************************/
 121 static int Demux( demux_t *p_demux );
 122 static int Control( demux_t *, int, va_list );
 123 static block_t *GrabVideo( demux_t *p_demux );
 124 static block_t *GrabAudio( demux_t *p_demux );
 125 static int process_options( demux_t *p_demux);
 126
 127 /*****************************************************************************
 128  * ScanCameras
 129  *****************************************************************************/
 130 static void ScanCameras( dc1394_sys *sys, demux_t *p_demux )
 131 {
 132     struct raw1394_portinfo portinfo[MAX_IEEE1394_HOSTS];
 133     raw1394handle_t tempFd;
 134     dc1394_camerainfo  info;
 135     dc_camera *node_list = NULL;
 136     nodeid_t  *nodes = NULL;
 137     int num_ports = 0;
 138     int num_cameras = 0;
 139     int nodecount;
 140     int i, n;
 141
 142     memset( &portinfo, 0, sizeof(portinfo) );
 143
 144     msg_Dbg( p_demux, "Scanning for ieee1394 ports ..." );
 145
 146     tempFd = raw1394_new_handle();
 147     if( !tempFd )
 148         return VLC_EGENERIC;
 149     raw1394_get_port_info( tempFd, portinfo, MAX_IEEE1394_HOSTS);
 150     raw1394_destroy_handle( tempFd );
 151
 152     for( i=0; i < MAX_IEEE1394_HOSTS; i++ )
 153     {
 154         /* check if port exists and has at least one node*/
 155         if( !portinfo[i].nodes )
 156             continue;
 157         nodes = NULL;
 158         nodecount = 0;
 159         tempFd = dc1394_create_handle( i );
 160
 161         /* skip this port if we can't obtain a valid handle */
 162         if( !tempFd )
 163             continue;
 164         msg_Dbg( p_demux, "Found ieee1394 port %d (%s) ... "
 165                           "checking for camera nodes",
 166                           i, portinfo[i].name );
 167         num_ports++;
 168
 169         nodes = dc1394_get_camera_nodes( tempFd, &nodecount, 0 );
 170         if( nodecount )
 171         {
 172             msg_Dbg( p_demux, "Found %d dc1394 cameras on port %d (%s)",
 173                      nodecount, i, portinfo[i].name );
 174
 175             if( node_list )
 176                 node_list = realloc( node_list, sizeof(dc_camera) * (num_cameras+nodecount) );
 177             else
 178                 node_list = malloc( sizeof(dc_camera) * nodecount);
 179
 180             for( n = 0; n < nodecount; n++ )
 181             {
 182                 int result = 0;
 183
 184                 result = dc1394_get_camera_info( tempFd, nodes[n], &info );
 185                 if( result == DC1394_SUCCESS )
 186                 {
 187                     node_list[num_cameras+n].uid = info.euid_64;
 188                 }
 189                 node_list[num_cameras+n].node = nodes[n];
 190                 node_list[num_cameras+n].port = i;
 191             }
 192             num_cameras += nodecount;
 193         }
 194         else
 195             msg_Dbg( p_demux, "no cameras found  on port %d (%s)",
 196                      i, portinfo[i].name );
 197
 198         if( tempFd )
 199             dc1394_destroy_handle( tempFd );
 200     }
 201     sys->num_ports = num_ports;
 202     sys->num_cameras = num_cameras;
 203     sys->camera_nodes = node_list;
 204 }
 205
 206 /*****************************************************************************
 207  * Open:
 208  *****************************************************************************/
 209 static int Open( vlc_object_t *p_this )
 210 {
 211     demux_t     *p_demux = (demux_t*)p_this;
 212     demux_sys_t *p_sys;
 213     es_format_t fmt;
 214     int i;
 215     int i_width;
 216     int i_height;
 217     int i_aspect;
 218     int result = 0;
 219
 220     /* Set up p_demux */
 221     p_demux->pf_demux = Demux;
 222     p_demux->pf_control = Control;
 223     p_demux->info.i_update = 0;
 224     p_demux->info.i_title = 0;
 225     p_demux->info.i_seekpoint = 0;
 226
 227     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 228     if( !p_sys )
 229     {
 230         msg_Err( p_demux, "not enough memory available" );
 231         return VLC_ENOMEM;
 232     }
 233     memset( p_sys, 0, sizeof( demux_sys_t ) );
 234     memset( &fmt, 0, sizeof( es_format_t ) );
 235
 236     /* DEFAULTS */
 237     p_sys->frame_size = MODE_640x480_YUV422;
 238     p_sys->width      = 640;
 239     p_sys->height     = 480;
 240     p_sys->frame_rate = FRAMERATE_30;
 241     p_sys->brightness = 200;
 242     p_sys->focus      = 0;
 243     p_sys->dma_capture = DMA_ON; /* defaults to VIDEO1394 capture mode */
 244     p_sys->fd_audio   = -1;
 245     p_sys->fd_video   = NULL;
 246     p_sys->camera_nodes = NULL;
 247     p_sys->selected_camera = 0;
 248     p_sys->dma_device = NULL;
 249     p_sys->selected_uid = 0;
 250
 251     /* PROCESS INPUT OPTIONS */
 252     if( process_options(p_demux) != VLC_SUCCESS )
 253     {
 254         msg_Err( p_demux, "Bad MRL, please check the option line "
 255                           "(MRL was: %s)",
 256                           p_demux->psz_path );
 257         free( p_sys );
 258         p_demux->p_sys = NULL;
 259         return VLC_EGENERIC;
 260     }
 261
 262     msg_Dbg( p_demux, "Selected camera %d", p_sys->selected_camera );
 263     msg_Dbg( p_demux, "Selected uid 0x%llx", p_sys->selected_uid );
 264
 265     ScanCameras( p_sys, p_demux );
 266     if( !p_sys->camera_nodes )
 267     {
 268         msg_Err( p_demux, "No camera found !!" );
 269         free( p_sys );
 270         p_demux->p_sys = NULL;
 271         return VLC_EGENERIC;
 272     }
 273
 274     if( p_sys->selected_uid )
 275     {
 276         int found = 0;
 277         for( i=0; i < p_sys->num_cameras; i++ )
 278         {
 279             if( p_sys->camera_nodes[i].uid == p_sys->selected_uid )
 280             {
 281                 p_sys->selected_camera = i;
 282                 found++;
 283                 break;
 284             }
 285         }
 286         if( !found )
 287         {
 288             msg_Err( p_demux, "Can't find camera with uid : 0x%llx.",
 289                      p_sys->selected_uid );
 290             Close( p_this );
 291             return VLC_EGENERIC;
 292         }
 293     }
 294     else if( p_sys->selected_camera >= p_sys->num_cameras )
 295     {
 296         msg_Err( p_demux, "there are not this many cameras. (%d/%d)",
 297                           p_sys->selected_camera, p_sys->num_cameras );
 298         Close( p_this );
 299         return VLC_EGENERIC;
 300     }
 301
 302     p_sys->fd_video = dc1394_create_handle(
 303                         p_sys->camera_nodes[p_sys->selected_camera].port );
 304     if( (int)p_sys->fd_video < 0 )
 305     {
 306         msg_Err( p_demux, "Can't init dc1394 handle" );
 307         Close( p_this );
 308         return VLC_EGENERIC;
 309     }
 310
 311     /* get camera info */
 312     result = dc1394_get_camera_info( p_sys->fd_video,
 313                         p_sys->camera_nodes[p_sys->selected_camera].node,
 314                         &p_sys->camera_info );
 315     if( result != DC1394_SUCCESS )
 316     {
 317         msg_Err( p_demux ,"unable to get camera info" );
 318         Close( p_this );
 319         return VLC_EGENERIC;
 320     }
 321
 322     dc1394_print_camera_info( &p_sys->camera_info );
 323     result = dc1394_get_camera_misc_info( p_sys->fd_video,
 324                         p_sys->camera_nodes[p_sys->selected_camera].node,
 325                         &p_sys->misc_info );
 326     if( result != DC1394_SUCCESS )
 327     {
 328         msg_Err( p_demux, "unable to get camera misc info" );
 329         Close( p_this );
 330         return VLC_EGENERIC;
 331     }
 332
 333     /* init camera and set some video options  */
 334     result = dc1394_init_camera( p_sys->camera_info.handle,
 335                                  p_sys->camera_info.id );
 336     if( result != DC1394_SUCCESS )
 337     {
 338         msg_Err( p_demux, "unable to get init dc1394 camera" );
 339         Close( p_this );
 340         return VLC_EGENERIC;
 341     }
 342
 343     if( p_sys->focus )
 344     {
 345         result = dc1394_set_focus( p_sys->camera_info.handle,
 346                         p_sys->camera_nodes[p_sys->selected_camera].node,
 347                         p_sys->focus );
 348         if( result != DC1394_SUCCESS )
 349         {
 350             msg_Err( p_demux, "unable to set initial focus to %u",
 351                      p_sys->focus );
 352         }
 353         msg_Dbg( p_demux, "Initial focus set to %u", p_sys->focus );
 354     }
 355
 356     result = dc1394_set_brightness( p_sys->camera_info.handle,
 357                         p_sys->camera_nodes[p_sys->selected_camera].node,
 358                         p_sys->brightness );
 359     if( result != DC1394_SUCCESS )
 360     {
 361         msg_Err( p_demux, "unable to set init brightness to %d",
 362                  p_sys->brightness);
 363         Close( p_this );
 364         return VLC_EGENERIC;
 365     }
 366
 367     result = dc1394_set_video_framerate( p_sys->camera_info.handle,
 368                         p_sys->camera_nodes[p_sys->selected_camera].node,
 369                         p_sys->frame_rate );
 370     if( result != DC1394_SUCCESS )
 371     {
 372         msg_Err( p_demux, "unable to set framerate to %d",
 373                  p_sys->frame_rate );
 374         Close( p_this );
 375         return VLC_EGENERIC;
 376     }
 377     p_sys->misc_info.framerate = p_sys->frame_rate;
 378
 379     result = dc1394_set_video_format( p_sys->camera_info.handle,
 380                         p_sys->camera_nodes[p_sys->selected_camera].node,
 381                         FORMAT_VGA_NONCOMPRESSED );
 382     if( result != DC1394_SUCCESS )
 383     {
 384         msg_Err( p_demux, "unable to set video format to VGA_NONCOMPRESSED" );
 385         Close( p_this );
 386         return VLC_EGENERIC;
 387     }
 388     p_sys->misc_info.format = FORMAT_VGA_NONCOMPRESSED;
 389
 390     result = dc1394_set_video_mode( p_sys->camera_info.handle,
 391                         p_sys->camera_nodes[p_sys->selected_camera].node,
 392                         p_sys->frame_size );
 393     if( result != DC1394_SUCCESS )
 394     {
 395         msg_Err( p_demux, "unable to set video mode" );
 396         Close( p_this );
 397         return VLC_EGENERIC;
 398     }
 399     p_sys->misc_info.mode = p_sys->frame_size;
 400
 401     /* reprobe everything */
 402     result = dc1394_get_camera_info( p_sys->camera_info.handle,
 403                                      p_sys->camera_info.id,
 404                                      &p_sys->camera_info );
 405     if( result != DC1394_SUCCESS )
 406     {
 407         msg_Err( p_demux, "Could not get camera basic information!" );
 408         Close( p_this );
 409         return VLC_EGENERIC;
 410     }
 411
 412     result = dc1394_get_camera_misc_info( p_sys->camera_info.handle,
 413                                           p_sys->camera_info.id,
 414                                           &p_sys->misc_info );
 415     if( result != DC1394_SUCCESS )
 416     {
 417         msg_Err( p_demux, "Could not get camera misc information!" );
 418         Close( p_this );
 419         return VLC_EGENERIC;
 420     }
 421
 422     /* set iso_channel */
 423     result = dc1394_set_iso_channel_and_speed( p_sys->camera_info.handle,
 424                                                p_sys->camera_info.id,
 425                                                p_sys->selected_camera,
 426                                                SPEED_400 );
 427     if( result != DC1394_SUCCESS )
 428     {
 429         msg_Err( p_demux, "Could not set iso channel!" );
 430         Close( p_this );
 431         return VLC_EGENERIC;
 432     }
 433     msg_Dbg( p_demux, "Using ISO channel %d", p_sys->misc_info.iso_channel );
 434     p_sys->misc_info.iso_channel = p_sys->selected_camera;
 435
 436     /* and setup capture */
 437     if( p_sys->dma_capture )
 438     {
 439         result = dc1394_dma_setup_capture( p_sys->camera_info.handle,
 440                         p_sys->camera_info.id,
 441                         p_sys->misc_info.iso_channel,
 442                         p_sys->misc_info.format,
 443                         p_sys->misc_info.mode,
 444                         SPEED_400,
 445                         p_sys->misc_info.framerate,
 446                         10, 0,
 447                         p_sys->dma_device,
 448                         &p_sys->camera );
 449         if( result != DC1394_SUCCESS )
 450         {
 451             msg_Err( p_demux ,"unable to setup camera" );
 452             Close( p_this );
 453             return VLC_EGENERIC;
 454         }
 455     }
 456     else
 457     {
 458         result = dc1394_setup_capture( p_sys->camera_info.handle,
 459                     p_sys->camera_info.id,
 460                     p_sys->misc_info.iso_channel,
 461                     p_sys->misc_info.format,
 462                     p_sys->misc_info.mode,
 463                     SPEED_400,
 464                     p_sys->misc_info.framerate,
 465                     &p_sys->camera );
 466         if( result != DC1394_SUCCESS)
 467         {
 468             msg_Err( p_demux ,"unable to setup camera" );
 469             Close( p_this );
 470             return VLC_EGENERIC;
 471         }
 472     }
 473
 474     /* TODO - UYV444 chroma converter is missing, when it will be available
 475      * fourcc will become variable (and not just a fixed value for UYVY)
 476      */
 477     i_width = p_sys->camera.frame_width;
 478     i_height = p_sys->camera.frame_height;
 479
 480     i_aspect = vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic,
 481                     VLC_FOURCC('U', 'Y', 'V', 'Y'),
 482                     i_width, i_height,
 483                     i_width * VOUT_ASPECT_FACTOR / i_height );
 484
 485     es_format_Init( &fmt, VIDEO_ES, VLC_FOURCC('U', 'Y', 'V', 'Y') );
 486
 487     fmt.video.i_width = i_width;
 488     fmt.video.i_height = i_height;
 489
 490     msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
 491              (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
 492
 493     p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
 494
 495     if( p_sys->audio_device )
 496     {
 497         OpenAudioDev( p_demux );
 498         if( p_sys->fd_audio >= 0 )
 499         {
 500             es_format_t fmt;
 501             es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
 502
 503             fmt.audio.i_channels = p_sys->channels ? p_sys->channels : 1;
 504             fmt.audio.i_rate = p_sys->i_sample_rate;
 505             fmt.audio.i_bitspersample = 16; /* FIXME: hmm, ?? */
 506             fmt.audio.i_blockalign = fmt.audio.i_channels *
 507                                      fmt.audio.i_bitspersample / 8;
 508             fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
 509                             fmt.audio.i_bitspersample;
 510
 511             msg_Dbg( p_demux, "new audio es %d channels %dHz",
 512             fmt.audio.i_channels, fmt.audio.i_rate );
 513
 514             p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
 515         }
 516     }
 517
 518     /* have the camera start sending us data */
 519     result = dc1394_start_iso_transmission( p_sys->camera_info.handle,
 520                                             p_sys->camera_info.id );
 521     if( result != DC1394_SUCCESS )
 522     {
 523         msg_Err( p_demux, "unable to start camera iso transmission" );
 524         if( p_sys->dma_capture )
 525         {
 526             dc1394_dma_release_camera( p_sys->fd_video, &p_sys->camera );
 527         }
 528         else
 529         {
 530             dc1394_release_camera( p_sys->fd_video, &p_sys->camera );
 531         }
 532         Close( p_this );
 533         return VLC_EGENERIC;
 534     }
 535     p_sys->misc_info.is_iso_on = DC1394_TRUE;
 536     return VLC_SUCCESS;
 537 }
 538
 539 static void OpenAudioDev( demux_t *p_demux )
 540 {
 541     demux_sys_t *p_sys = p_demux->p_sys;
 542     char *psz_device = p_sys->audio_device;
 543     int i_format = AFMT_S16_LE;
 544     int result;
 545
 546     p_sys->fd_audio = open( psz_device, O_RDONLY | O_NONBLOCK );
 547     if( p_sys->fd_audio  < 0 )
 548     {
 549         msg_Err( p_demux, "cannot open audio device (%s)", psz_device );
 550         CloseAudioDev( p_demux );
 551     }
 552
 553     if( !p_sys->i_sample_rate )
 554         p_sys->i_sample_rate = 44100;
 555
 556     result = ioctl( p_sys->fd_audio, SNDCTL_DSP_SETFMT, &i_format );
 557     if( (result  < 0) || (i_format != AFMT_S16_LE) )
 558     {
 559         msg_Err( p_demux, "cannot set audio format (16b little endian) "
 560                           "(%d)", i_format );
 561         CloseAudioDev( p_demux );
 562     }
 563
 564     result = ioctl( p_sys->fd_audio, SNDCTL_DSP_CHANNELS, &p_sys->channels );
 565     if( result < 0 )
 566     {
 567         msg_Err( p_demux, "cannot set audio channels count (%d)",
 568                  p_sys->channels );
 569         CloseAudioDev( p_demux );
 570     }
 571
 572     result = ioctl( p_sys->fd_audio, SNDCTL_DSP_SPEED, &p_sys->i_sample_rate );
 573     if( result < 0 )
 574     {
 575         msg_Err( p_demux, "cannot set audio sample rate (%s)", p_sys->i_sample_rate );
 576         CloseAudioDev( p_demux );
 577     }
 578
 579     msg_Dbg( p_demux, "opened adev=`%s' %s %dHz",
 580              psz_device,
 581              (p_sys->channels > 1) ? "stereo" : "mono",
 582              p_sys->i_sample_rate );
 583
 584     p_sys->i_audio_max_frame_size = 32 * 1024;
 585 }
 586
 587 static inline void CloseAudioDev( demux_t *p_demux )
 588 {
 589     demux_sys_t *p_sys = NULL;
 590
 591     if( p_demux )
 592     {
 593         p_sys = p_demux->p_sys;
 594         if( p_sys->fd_audio >= 0 )
 595             close( p_sys->fd_audio );
 596     }
 597 }
 598
 599 /*****************************************************************************
 600  * Close:
 601  *****************************************************************************/
 602 static void Close( vlc_object_t *p_this )
 603 {
 604     demux_t     *p_demux = (demux_t*)p_this;
 605     demux_sys_t *p_sys = p_demux->p_sys;
 606     int result = 0;
 607
 608     /* Stop data transmission */
 609     result = dc1394_stop_iso_transmission( p_sys->fd_video,
 610                                            p_sys->camera.node );
 611     if( result != DC1394_SUCCESS )
 612     {
 613         msg_Err( p_demux, "couldn't stop the camera" );
 614     }
 615
 616     /* Close camera */
 617     if( p_sys->dma_capture )
 618     {
 619         dc1394_dma_unlisten( p_sys->fd_video, &p_sys->camera );
 620         dc1394_dma_release_camera( p_sys->fd_video, &p_sys->camera );
 621     }
 622     else
 623     {
 624         dc1394_release_camera( p_sys->fd_video, &p_sys->camera );
 625     }
 626
 627     if( p_sys->fd_video )
 628         dc1394_destroy_handle( p_sys->fd_video );
 629     CloseAudioDev( p_demux );
 630
 631     free( p_sys->camera_nodes );
 632     free( p_sys->audio_device );
 633
 634     free( p_sys );
 635 }
 636
 637 static void MovePixelUYVY( void *src, int spos, void *dst, int dpos )
 638 {
 639     char u,v,y;
 640     u_char  *sc;
 641     u_char  *dc;
 642
 643     sc = (u_char *)src + (spos*2);
 644     if( spos % 2 )
 645     {
 646         v = sc[0];
 647         y = sc[1];
 648         u = *(sc -2);
 649     }
 650     else
 651     {
 652         u = sc[0];
 653         y = sc[1];
 654         v = sc[2];
 655     }
 656     dc = (u_char *)dst+(dpos*2);
 657     if( dpos % 2 )
 658     {
 659         dc[0] = v;
 660         dc[1] = y;
 661     }
 662     else
 663     {
 664         dc[0] = u;
 665         dc[1] = y;
 666     }
 667 }
 668
 669 /*****************************************************************************
 670  * Demux:
 671  *****************************************************************************/
 672 static block_t *GrabVideo( demux_t *p_demux )
 673 {
 674     demux_sys_t *p_sys = p_demux->p_sys;
 675     block_t     *p_block = NULL;
 676     int result = 0;
 677
 678     if( p_sys->dma_capture )
 679     {
 680         result = dc1394_dma_single_capture( &p_sys->camera );
 681         if( result != DC1394_SUCCESS )
 682         {
 683             msg_Err( p_demux, "unable to capture a frame" );
 684             return NULL;
 685         }
 686     }
 687     else
 688     {
 689         result = dc1394_single_capture( p_sys->camera_info.handle,
 690                                         &p_sys->camera );
 691         if( result != DC1394_SUCCESS )
 692         {
 693             msg_Err( p_demux, "unable to capture a frame" );
 694             return NULL;
 695         }
 696     }
 697
 698     p_block = block_New( p_demux, p_sys->camera.frame_width *
 699                                   p_sys->camera.frame_height * 2 );
 700     if( !p_block )
 701     {
 702         msg_Err( p_demux, "cannot get block" );
 703         return NULL;
 704     }
 705
 706     if( !p_sys->camera.capture_buffer )
 707     {
 708         msg_Err (p_demux, "caputer buffer empty");
 709         block_Release( p_block );
 710         return NULL;
 711     }
 712
 713     memcpy( p_block->p_buffer, (const char *)p_sys->camera.capture_buffer,
 714             p_sys->camera.frame_width * p_sys->camera.frame_height * 2 );
 715
 716     p_block->i_pts = p_block->i_dts = mdate();
 717     if( p_sys->dma_capture )
 718         dc1394_dma_done_with_buffer( &p_sys->camera );
 719     return p_block;
 720 }
 721
 722 static block_t *GrabAudio( demux_t *p_demux )
 723 {
 724     demux_sys_t *p_sys = p_demux->p_sys;
 725     struct audio_buf_info buf_info;
 726     block_t *p_block = NULL;
 727     int i_read = 0;
 728     int i_correct = 0;
 729     int result = 0;
 730
 731     p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
 732     if( !p_block )
 733     {
 734         msg_Warn( p_demux, "cannot get buffer" );
 735         return NULL;
 736     }
 737
 738     i_read = read( p_sys->fd_audio, p_block->p_buffer,
 739                    p_sys->i_audio_max_frame_size );
 740
 741     if( i_read <= 0 )
 742         return NULL;
 743
 744     p_block->i_buffer = i_read;
 745
 746     /* Correct the date because of kernel buffering */
 747     i_correct = i_read;
 748     result = ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info );
 749     if( result == 0 )
 750         i_correct += buf_info.bytes;
 751
 752     p_block->i_pts = p_block->i_dts =
 753                         mdate() - INT64_C(1000000) * (mtime_t)i_correct /
 754                         2 / p_sys->channels / p_sys->i_sample_rate;
 755     return p_block;
 756 }
 757
 758 static int Demux( demux_t *p_demux )
 759 {
 760     demux_sys_t *p_sys = p_demux->p_sys;
 761     block_t *p_blocka = NULL;
 762     block_t *p_blockv = NULL;
 763
 764     /* Try grabbing audio frames first */
 765     if( p_sys->fd_audio > 0 )
 766         p_blocka = GrabAudio( p_demux );
 767
 768     /* Try grabbing video frame */
 769     if( (int)p_sys->fd_video > 0 )
 770         p_blockv = GrabVideo( p_demux );
 771
 772     if( !p_blocka && !p_blockv )
 773     {
 774         /* Sleep so we do not consume all the cpu, 10ms seems
 775          * like a good value (100fps)
 776          */
 777         msleep( 10000 );
 778         return 1;
 779     }
 780
 781     if( p_blocka )
 782     {
 783         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_blocka->i_pts );
 784         es_out_Send( p_demux->out, p_sys->p_es_audio, p_blocka );
 785     }
 786
 787     if( p_blockv )
 788     {
 789         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_blockv->i_pts );
 790         es_out_Send( p_demux->out, p_sys->p_es_video, p_blockv );
 791     }
 792     return 1;
 793 }
 794
 795 /*****************************************************************************
 796  * Control:
 797  *****************************************************************************/
 798 static int Control( demux_t *p_demux, int i_query, va_list args )
 799 {
 800     bool *pb;
 801     int64_t    *pi64;
 802
 803     switch( i_query )
 804     {
 805         /* Special for access_demux */
 806         case DEMUX_CAN_PAUSE:
 807         case DEMUX_CAN_SEEK:
 808         case DEMUX_SET_PAUSE_STATE:
 809         case DEMUX_CAN_CONTROL_PACE:
 810             pb = (bool*)va_arg( args, bool * );
 811             *pb = false;
 812             return VLC_SUCCESS;
 813
 814         case DEMUX_GET_PTS_DELAY:
 815             pi64 = (int64_t*)va_arg( args, int64_t * );
 816             *pi64 = (int64_t)DEFAULT_PTS_DELAY;
 817             return VLC_SUCCESS;
 818
 819         case DEMUX_GET_TIME:
 820             pi64 = (int64_t*)va_arg( args, int64_t * );
 821             *pi64 = mdate();
 822             return VLC_SUCCESS;
 823
 824         /* TODO implement others */
 825         default:
 826             return VLC_EGENERIC;
 827     }
 828     return VLC_EGENERIC;
 829 }
 830
 831 static int process_options( demux_t *p_demux )
 832 {
 833     demux_sys_t *p_sys = p_demux->p_sys;
 834     char *psz_dup;
 835     char *psz_parser;
 836     char *token = NULL;
 837     char *state = NULL;
 838     float rate_f;
 839
 840     if( strncmp(p_demux->psz_access, "dc1394", 6) != 0 )
 841         return VLC_EGENERIC;
 842
 843     psz_dup = strdup( p_demux->psz_path );
 844     psz_parser = psz_dup;
 845     for( token = strtok_r( psz_parser,":",&state); token;
 846          token = strtok_r( NULL, ":", &state ) )
 847     {
 848         if( strncmp( token, "size=", strlen("size=") ) == 0 )
 849         {
 850             token += strlen("size=");
 851             if( strncmp( token, "160x120", 7 ) == 0 )
 852             {
 853                 /* TODO - UYV444 chroma converter is needed ...
 854                     * video size of 160x120 is temporarily disabled
 855                     */
 856                 msg_Err( p_demux,
 857                     "video size of 160x120 is actually disabled for lack of chroma "
 858                     "support. It will relased ASAP, until then try an higher size "
 859                     "(320x240 and 640x480 are fully supported)" );
 860                 free( psz_dup );
 861                 return VLC_EGENERIC;
 862 #if 0
 863                 p_sys->frame_size = MODE_160x120_YUV444;
 864                 p_sys->width = 160;
 865                 p_sys->height = 120;
 866 #endif
 867             }
 868             else if( strncmp( token, "320x240", 7 ) == 0 )
 869             {
 870                 p_sys->frame_size = MODE_320x240_YUV422;
 871                 p_sys->width = 320;
 872                 p_sys->height = 240;
 873             }
 874             else if( strncmp( token, "640x480", 7 ) == 0 )
 875             {
 876                 p_sys->frame_size = MODE_640x480_YUV422;
 877                 p_sys->width = 640;
 878                 p_sys->height = 480;
 879             }
 880             else
 881             {
 882                 msg_Err( p_demux,
 883                     "This program currently suppots frame sizes of"
 884                     " 160x120, 320x240, and 640x480. "
 885                     "Please specify one of them. You have specified %s.",
 886                     token );
 887                 free( psz_dup );
 888                 return VLC_EGENERIC;
 889             }
 890             msg_Dbg( p_demux, "Requested video size : %s",token );
 891         }
 892         else if( strncmp( token, "fps=", strlen( "fps=" ) ) == 0 )
 893         {
 894             token += strlen("fps=");
 895             sscanf( token, "%g", &rate_f );
 896             if( rate_f == 1.875 )
 897                 p_sys->frame_rate = FRAMERATE_1_875;
 898             else if( rate_f == 3.75 )
 899                 p_sys->frame_rate = FRAMERATE_3_75;
 900             else if( rate_f == 7.5 )
 901                 p_sys->frame_rate = FRAMERATE_7_5;
 902             else if( rate_f == 15 )
 903                 p_sys->frame_rate = FRAMERATE_15;
 904             else if( rate_f == 30 )
 905                 p_sys->frame_rate = FRAMERATE_30;
 906             else if( rate_f == 60 )
 907                 p_sys->frame_rate = FRAMERATE_60;
 908             else
 909             {
 910                 msg_Err( p_demux ,
 911                     "This program supports framerates of"
 912                     " 1.875, 3.75, 7.5, 15, 30, 60. "
 913                     "Please specify one of them. You have specified %s.",
 914                     token);
 915                 free( psz_dup );
 916                 return VLC_EGENERIC;
 917             }
 918             msg_Dbg( p_demux, "Requested frame rate : %s",token );
 919         }
 920         else if( strncmp( token, "brightness=", strlen( "brightness=" ) ) == 0 )
 921         {
 922             int nr = 0;
 923             token += strlen("brightness=");
 924             nr = sscanf( token, "%u", &p_sys->brightness);
 925             if( nr != 1 )
 926             {
 927                 msg_Err( p_demux, "Bad brightness value '%s', "
 928                                   "must be an unsigned integer.",
 929                                   token );
 930                 free( psz_dup );
 931                 return VLC_EGENERIC;
 932             }
 933         }
 934 #if 0
 935         else if( strncmp( token, "controller=", strlen( "controller=" ) ) == 0 )
 936         {
 937             int nr = 0;
 938             token += strlen("controller=");
 939             nr = sscanf( token, "%u", &p_sys->controller );
 940             if( nr != 1)
 941             {
 942                 msg_Err(p_demux, "Bad controller value '%s', "
 943                                  "must be an unsigned integer.",
 944                                  token );
 945                 return VLC_EGENERIC;
 946             }
 947         }
 948 #endif
 949         else if( strncmp( token, "camera=", strlen( "camera=" ) ) == 0 )
 950         {
 951             int nr = 0;
 952             token += strlen("camera=");
 953             nr = sscanf(token,"%u",&p_sys->selected_camera);
 954             if( nr != 1)
 955             {
 956                 msg_Err( p_demux, "Bad camera number '%s', "
 957                                   "must be an unsigned integer.",
 958                                   token );
 959                 free( psz_dup );
 960                 return VLC_EGENERIC;
 961             }
 962         }
 963         else if( strncmp( token, "capture=", strlen( "capture=" ) ) == 0)
 964         {
 965             token += strlen("capture=");
 966             if( strncmp(token, "raw1394",7) == 0 )
 967             {
 968                 msg_Dbg( p_demux, "DMA capture disabled!" );
 969                 p_sys->dma_capture = DMA_OFF;
 970             }
 971             else if( strncmp(token,"video1394",9) == 0 )
 972             {
 973                 msg_Dbg( p_demux, "DMA capture enabled!" );
 974                 p_sys->dma_capture = DMA_ON;
 975             }
 976             else
 977             {
 978                 msg_Err(p_demux, "Bad capture method value '%s', "
 979                                  "it can be 'raw1394' or 'video1394'.",
 980                                 token );
 981                 free( psz_dup );
 982                 return VLC_EGENERIC;
 983             }
 984         }
 985         else if( strncmp( token, "adev=", strlen( "adev=" ) ) == 0 )
 986         {
 987             token += strlen("adev=");
 988             p_sys->audio_device = strdup(token);
 989             msg_Dbg( p_demux, "Using audio device '%s'.", token );
 990         }
 991         else if( strncmp( token, "samplerate=", strlen( "samplerate=" ) ) == 0 )
 992         {
 993             token += strlen("samplerate=");
 994             sscanf( token, "%d", &p_sys->i_sample_rate );
 995         }
 996         else if( strncmp( token, "channels=", strlen("channels=" ) ) == 0 )
 997         {
 998             token += strlen("channels=");
 999             sscanf( token, "%d", &p_sys->channels );
1000         }
1001         else if( strncmp( token, "focus=", strlen("focus=" ) ) == 0)
1002         {
1003             token += strlen("focus=");
1004             sscanf( token, "%u", &p_sys->focus );
1005         }
1006         else if( strncmp( token, "uid=", strlen("uid=") ) == 0)
1007         {
1008             token += strlen("uid=");
1009             sscanf( token, "0x%llx", &p_sys->selected_uid );
1010         }
1011     }
1012     free( psz_dup );
1013     return VLC_SUCCESS;
1014 }
1015