git.sesse.net Git - vlc/blob - modules/video_filter/opencv_wrapper.c

   1 /*****************************************************************************
   2  * opencv_wrapper.c : OpenCV wrapper video filter
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  *
   6  * Authors: Dugal Harris <dugalh@protoclea.co.za>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #include <cxcore.h>
  28 #include <cv.h>
  29 #include <highgui.h>
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <vlc_common.h>
  36 #include <vlc_plugin.h>
  37 #include <vlc_vout.h>
  38
  39 #include <math.h>
  40 #include <time.h>
  41
  42 #include "vlc_filter.h"
  43 #include "filter_common.h"
  44 #include <vlc_charset.h>
  45 #include "vlc_image.h"
  46 #include "vlc_input.h"
  47 #include "vlc_playlist.h"
  48
  49
  50 /*****************************************************************************
  51  * Local prototypes
  52  *****************************************************************************/
  53 static int  Create    ( vlc_object_t * );
  54 static void Destroy   ( vlc_object_t * );
  55
  56 static int  Init      ( vout_thread_t * );
  57 static void End       ( vout_thread_t * );
  58 static void Render    ( vout_thread_t *, picture_t * );
  59
  60 static void ReleaseImages( vout_thread_t *p_vout );
  61 static void VlcPictureToIplImage( vout_thread_t *p_vout, picture_t *p_in );
  62
  63 /*****************************************************************************
  64  * Module descriptor
  65  *****************************************************************************/
  66
  67 static const char *const chroma_list[] = { "input", "I420", "RGB32"};
  68 static const char *const chroma_list_text[] = { N_("Use input chroma unaltered"),
  69   N_("I420 - first plane is greyscale"), N_("RGB32")};
  70
  71 static const char *const output_list[] = { "none", "input", "processed"};
  72 static const char *const output_list_text[] = { N_("Don't display any video"),
  73   N_("Display the input video"), N_("Display the processed video")};
  74
  75 static const char *const verbosity_list[] = { "error", "warning", "debug"};
  76 static const char *const verbosity_list_text[] = { N_("Show only errors"),
  77   N_("Show errors and warnings"), N_("Show everything including debug messages")};
  78
  79 vlc_module_begin ()
  80     set_description( N_("OpenCV video filter wrapper") )
  81     set_shortname( N_("OpenCV" ))
  82     set_category( CAT_VIDEO )
  83     set_subcategory( SUBCAT_VIDEO_VFILTER )
  84     set_capability( "video filter", 0 )
  85     add_shortcut( "opencv_wrapper" )
  86     set_callbacks( Create, Destroy )
  87     add_float_with_range( "opencv-scale", 1.0, 0.1, 2.0, NULL,
  88                           N_("Scale factor (0.1-2.0)"),
  89                           N_("Ammount by which to scale the picture before sending it to the internal OpenCV filter"),
  90                           false )
  91     add_string( "opencv-chroma", "input", NULL,
  92                           N_("OpenCV filter chroma"),
  93                           N_("Chroma to convert picture to before sending it to the internal OpenCV filter"), false);
  94         change_string_list( chroma_list, chroma_list_text, 0);
  95     add_string( "opencv-output", "input", NULL,
  96                           N_("Wrapper filter output"),
  97                           N_("Determines what (if any) video is displayed by the wrapper filter"), false);
  98         change_string_list( output_list, output_list_text, 0);
  99     add_string( "opencv-verbosity", "error", NULL,
 100                           N_("Wrapper filter verbosity"),
 101                           N_("Determines wrapper filter verbosity level"), false);
 102         change_string_list( verbosity_list, verbosity_list_text, 0);
 103     add_string( "opencv-filter-name", "none", NULL,
 104                           N_("OpenCV internal filter name"),
 105                           N_("Name of internal OpenCV plugin filter to use"), false);
 106 vlc_module_end ()
 107
 108
 109 /*****************************************************************************
 110  * wrapper_output_t: what video is output
 111  *****************************************************************************/
 112 enum wrapper_output_t
 113 {
 114    NONE,    //not working yet
 115    VINPUT,
 116    PROCESSED
 117 };
 118
 119 /*****************************************************************************
 120  * internal_chroma_t: what chroma is sent to the internal opencv filter
 121  *****************************************************************************/
 122 enum internal_chroma_t
 123 {
 124    CINPUT,
 125    GREY,
 126    RGB
 127 };
 128
 129 /*****************************************************************************
 130  * verbosity_t:
 131  *****************************************************************************/
 132 enum verbosity_t
 133 {
 134    VERB_ERROR,
 135    VERB_WARN,
 136    VERB_DEBUG
 137 };
 138
 139 /*****************************************************************************
 140  * vout_sys_t: opencv_wrapper video output method descriptor
 141  *****************************************************************************
 142  * This structure is part of the video output thread descriptor.
 143  * It describes the opencv_wrapper specific properties of an output thread.
 144  *****************************************************************************/
 145 struct vout_sys_t
 146 {
 147     vout_thread_t *p_vout;
 148
 149     image_handler_t *p_image;
 150
 151     int i_cv_image_size;
 152
 153     picture_t *p_proc_image;
 154     picture_t *p_to_be_freed;
 155
 156     float f_scale;
 157
 158     int i_wrapper_output;
 159     int i_internal_chroma;
 160     int i_verbosity;
 161
 162     IplImage *p_cv_image[VOUT_MAX_PLANES];
 163
 164     filter_t *p_opencv;
 165     char* psz_inner_name;
 166
 167     picture_t hacked_pic;
 168 };
 169
 170 /*****************************************************************************
 171  * Control: control facility for the vout (forwards to child vout)
 172  *****************************************************************************/
 173 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 174 {
 175     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 176 }
 177
 178 /*****************************************************************************
 179  * Create: allocates opencv_wrapper video thread output method
 180  *****************************************************************************
 181  * This function allocates and initializes a opencv_wrapper vout method.
 182  *****************************************************************************/
 183 static int Create( vlc_object_t *p_this )
 184 {
 185     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 186     char *psz_chroma, *psz_output, *psz_verbosity;
 187     int i = 0;
 188
 189     /* Allocate structure */
 190     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 191     if( p_vout->p_sys == NULL )
 192         return VLC_ENOMEM;
 193
 194     /* Init structure */
 195     p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
 196     for (i = 0; i < VOUT_MAX_PLANES; i++)
 197         p_vout->p_sys->p_cv_image[i] = NULL;
 198     p_vout->p_sys->p_proc_image = NULL;
 199     p_vout->p_sys->p_to_be_freed = NULL;
 200     p_vout->p_sys->i_cv_image_size = 0;
 201
 202     p_vout->pf_init = Init;
 203     p_vout->pf_end = End;
 204     p_vout->pf_manage = NULL;
 205     p_vout->pf_render = Render;
 206     p_vout->pf_display = NULL;
 207     p_vout->pf_control = Control;
 208
 209     /* Retrieve and apply config */
 210     if( !(psz_chroma = config_GetPsz( p_vout, "opencv-chroma" )) )
 211     {
 212         msg_Err( p_vout, "configuration variable %s empty, using 'grey'",
 213                          "opencv-chroma" );
 214         p_vout->p_sys->i_internal_chroma = GREY;
 215     }
 216     else
 217     {
 218         if( !strcmp( psz_chroma, "input" ) )
 219             p_vout->p_sys->i_internal_chroma = CINPUT;
 220         else if( !strcmp( psz_chroma, "I420" ) )
 221             p_vout->p_sys->i_internal_chroma = GREY;
 222         else if( !strcmp( psz_chroma, "RGB32" ) )
 223             p_vout->p_sys->i_internal_chroma = RGB;
 224         else
 225         {
 226             msg_Err( p_vout, "no valid opencv-chroma provided, using 'grey'" );
 227             p_vout->p_sys->i_internal_chroma = GREY;
 228         }
 229     }
 230     free( psz_chroma);
 231
 232     if( !(psz_output = config_GetPsz( p_vout, "opencv-output" )) )
 233     {
 234         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 235                          "opencv-output" );
 236         p_vout->p_sys->i_wrapper_output = VINPUT;
 237     }
 238     else
 239     {
 240         if( !strcmp( psz_output, "none" ) )
 241             p_vout->p_sys->i_wrapper_output = NONE;
 242         else if( !strcmp( psz_output, "input" ) )
 243             p_vout->p_sys->i_wrapper_output = VINPUT;
 244         else if( !strcmp( psz_output, "processed" ) )
 245             p_vout->p_sys->i_wrapper_output = PROCESSED;
 246         else
 247         {
 248             msg_Err( p_vout, "no valid opencv-output provided, using 'input'" );
 249             p_vout->p_sys->i_wrapper_output = VINPUT;
 250         }
 251     }
 252     free( psz_output);
 253
 254     if( !(psz_verbosity = config_GetPsz( p_vout, "opencv-verbosity" )) )
 255     {
 256         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 257                          "opencv-verbosity" );
 258         p_vout->p_sys->i_verbosity = VERB_ERROR;
 259     }
 260     else
 261     {
 262         if( !strcmp( psz_verbosity, "error" ) )
 263             p_vout->p_sys->i_verbosity = VERB_ERROR;
 264         else if( !strcmp( psz_verbosity, "warning" ) )
 265             p_vout->p_sys->i_verbosity = VERB_WARN;
 266         else if( !strcmp( psz_verbosity, "debug" ) )
 267             p_vout->p_sys->i_verbosity = VERB_DEBUG;
 268         else
 269         {
 270             msg_Err( p_vout, "no valid opencv-verbosity provided, using 'error'" );
 271             p_vout->p_sys->i_verbosity = VERB_ERROR;
 272         }
 273     }
 274     free( psz_verbosity);
 275
 276     p_vout->p_sys->psz_inner_name = config_GetPsz( p_vout, "opencv-filter-name" );
 277
 278     p_vout->p_sys->f_scale =
 279         config_GetFloat( p_vout, "opencv-scale" );
 280
 281     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 282         msg_Info(p_vout, "Configuration: opencv-scale: %f, opencv-chroma: %d, "
 283             "opencv-output: %d, opencv-verbosity %d, opencv-filter %s",
 284             p_vout->p_sys->f_scale,
 285             p_vout->p_sys->i_internal_chroma,
 286             p_vout->p_sys->i_wrapper_output,
 287             p_vout->p_sys->i_verbosity,
 288             p_vout->p_sys->psz_inner_name);
 289
 290     return VLC_SUCCESS;
 291 }
 292
 293 /*****************************************************************************
 294  * Init: initialize opencv_wrapper video thread output method
 295  *****************************************************************************/
 296 static int Init( vout_thread_t *p_vout )
 297 {
 298     video_format_t fmt;
 299     vout_sys_t *p_sys = p_vout->p_sys;
 300     I_OUTPUTPICTURES = 0;
 301
 302     /* Initialize the output video format */
 303     memset( &fmt, 0, sizeof(video_format_t) );
 304     p_vout->output.i_chroma = p_vout->render.i_chroma;
 305     p_vout->output.i_width  = p_vout->render.i_width;
 306     p_vout->output.i_height = p_vout->render.i_height;
 307     p_vout->output.i_aspect = p_vout->render.i_aspect;
 308     p_vout->fmt_out = p_vout->fmt_in;           //set to input video format
 309
 310     fmt = p_vout->fmt_out;
 311     if (p_sys->i_wrapper_output == PROCESSED)   //set to processed video format
 312     {
 313         fmt.i_width = fmt.i_width * p_sys->f_scale;
 314         fmt.i_height = fmt.i_height * p_sys->f_scale;
 315         fmt.i_visible_width = fmt.i_visible_width * p_sys->f_scale;
 316         fmt.i_visible_height = fmt.i_visible_height * p_sys->f_scale;
 317         fmt.i_x_offset = fmt.i_x_offset * p_sys->f_scale;
 318         fmt.i_y_offset = fmt.i_y_offset * p_sys->f_scale;
 319
 320         if (p_sys->i_internal_chroma == GREY)
 321             fmt.i_chroma = VLC_FOURCC('I','4','2','0');
 322         else if (p_sys->i_internal_chroma == RGB)
 323             fmt.i_chroma = VLC_FOURCC('R','V','3','2');
 324     }
 325
 326     /* Load the internal opencv filter */
 327     /* We don't need to set up video formats for this filter as it not actually using a picture_t */
 328     p_sys->p_opencv = vlc_object_create( p_vout, sizeof(filter_t) );
 329     vlc_object_attach( p_sys->p_opencv, p_vout );
 330
 331     if (p_vout->p_sys->psz_inner_name)
 332         p_sys->p_opencv->p_module =
 333             module_need( p_sys->p_opencv, p_sys->psz_inner_name, NULL, false );
 334
 335     if( !p_sys->p_opencv->p_module )
 336     {
 337         msg_Err( p_vout, "can't open internal opencv filter: %s", p_vout->p_sys->psz_inner_name );
 338         p_vout->p_sys->psz_inner_name = NULL;
 339         vlc_object_detach( p_sys->p_opencv );
 340         vlc_object_release( p_sys->p_opencv );
 341         p_sys->p_opencv = NULL;
 342     }
 343
 344     /* Try to open the real video output */
 345     if (p_sys->i_verbosity > VERB_WARN)
 346         msg_Dbg( p_vout, "spawning the real video output" );
 347
 348     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 349
 350     /* Everything failed */
 351     if( p_vout->p_sys->p_vout == NULL )
 352     {
 353         msg_Err( p_vout, "can't open vout, aborting" );
 354         return VLC_EGENERIC;
 355     }
 356
 357     vout_filter_AllocateDirectBuffers( p_vout, VOUT_MAX_PICTURES );
 358
 359     vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, NULL );
 360
 361     return VLC_SUCCESS;
 362 }
 363
 364 /*****************************************************************************
 365  * End: terminate opencv_wrapper video thread output method
 366  *****************************************************************************/
 367 static void End( vout_thread_t *p_vout )
 368 {
 369     vout_sys_t *p_sys = p_vout->p_sys;
 370
 371     vout_filter_DelChild( p_vout, p_sys->p_vout, NULL );
 372     vout_CloseAndRelease( p_sys->p_vout );
 373
 374     vout_filter_ReleaseDirectBuffers( p_vout );
 375
 376     if( p_sys->p_opencv )
 377     {
 378         //release the internal opencv filter
 379         if( p_sys->p_opencv->p_module )
 380             module_unneed( p_sys->p_opencv, p_sys->p_opencv->p_module );
 381         vlc_object_detach( p_sys->p_opencv );
 382         vlc_object_release( p_sys->p_opencv );
 383         p_sys->p_opencv = NULL;
 384     }
 385 }
 386
 387 /*****************************************************************************
 388  * Destroy: destroy opencv_wrapper video thread output method
 389  *****************************************************************************
 390  * Terminate an output method created by opencv_wrapperCreateOutputMethod
 391  *****************************************************************************/
 392 static void Destroy( vlc_object_t *p_this )
 393 {
 394     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 395
 396     ReleaseImages(p_vout);
 397
 398     if( p_vout->p_sys->p_image )
 399         image_HandlerDelete( p_vout->p_sys->p_image );
 400
 401     free( p_vout->p_sys );
 402 }
 403
 404 /*****************************************************************************
 405  * ReleaseImages: Release OpenCV images in vout_sys_t.
 406  *****************************************************************************/
 407 static void ReleaseImages(vout_thread_t *p_vout)
 408 {
 409     int i = 0;
 410     if (p_vout->p_sys->p_cv_image)
 411     {
 412         for (i = 0; i < VOUT_MAX_PLANES; i++)
 413         {
 414             if (p_vout->p_sys->p_cv_image[i])
 415                 cvReleaseImageHeader(&(p_vout->p_sys->p_cv_image[i]));
 416             p_vout->p_sys->p_cv_image[i] = NULL;
 417         }
 418     }
 419     p_vout->p_sys->i_cv_image_size = 0;
 420
 421     /* Release temp picture_t if it exists */
 422     if (p_vout->p_sys->p_to_be_freed)
 423     {
 424         picture_Release( p_vout->p_sys->p_to_be_freed );
 425         p_vout->p_sys->p_to_be_freed = NULL;
 426     }
 427     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 428         msg_Dbg( p_vout, "images released" );
 429 }
 430
 431 /*****************************************************************************
 432  * VlcPictureToIplImage: Convert picture_t to IplImage
 433  *****************************************************************************
 434  * Converts given picture_t into IplImage(s) according to module config.
 435  * IplImage(s) are stored in vout_sys_t.
 436  *****************************************************************************/
 437 static void VlcPictureToIplImage( vout_thread_t *p_vout, picture_t *p_in )
 438 {
 439     int planes = p_in->i_planes;    //num input video planes
 440     // input video size
 441     CvSize sz = cvSize(abs(p_in->format.i_width), abs(p_in->format.i_height));
 442     video_format_t fmt_out;
 443     clock_t start, finish;  //performance measures
 444     double  duration;
 445     int i = 0;
 446     vout_sys_t* p_sys = p_vout->p_sys;
 447
 448     memset( &fmt_out, 0, sizeof(video_format_t) );
 449
 450     start = clock();
 451
 452     //do scale / color conversion according to p_sys config
 453     if ((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 454     {
 455         fmt_out = p_in->format;
 456
 457         //calc the scaled video size
 458         fmt_out.i_width = p_in->format.i_width * p_sys->f_scale;
 459         fmt_out.i_height = p_in->format.i_height * p_sys->f_scale;
 460
 461         if (p_sys->i_internal_chroma == RGB)
 462         {
 463             //rgb2 gives 3 separate planes, this gives 1 interleaved plane
 464             //rv24 gives is about 20% faster but gives r&b the wrong way round
 465             //and I cant think of an easy way to fix this
 466             fmt_out.i_chroma = VLC_FOURCC('R','V','3','2');
 467         }
 468         else if (p_sys->i_internal_chroma == GREY)
 469         {
 470             //take the I (gray) plane (video seems to commonly be in this fmt so usually the
 471             //conversion does nothing)
 472             fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
 473         }
 474
 475         //convert from the input image
 476         p_sys->p_proc_image = image_Convert( p_sys->p_image, p_in,
 477                                      &(p_in->format), &fmt_out );
 478
 479         if (!p_sys->p_proc_image)
 480         {
 481             msg_Err(p_vout, "can't convert (unsupported formats?), aborting...");
 482             return;
 483         }
 484
 485         p_sys->p_to_be_freed = p_sys->p_proc_image;    //remember this so we can free it later
 486
 487     }
 488     else    //((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 489     {
 490         //use the input image without conversion
 491         p_sys->p_proc_image = p_in;
 492     }
 493
 494     //Convert to the IplImage array that is to be processed.
 495     //If there are multiple planes in p_sys->p_proc_image, then 1 IplImage
 496     //is created for each plane.
 497     planes = p_sys->p_proc_image->i_planes;
 498     p_sys->i_cv_image_size = planes;
 499     for ( i = 0; i < planes; i++ )
 500     {
 501         sz = cvSize(abs(p_sys->p_proc_image->p[i].i_visible_pitch /
 502             p_sys->p_proc_image->p[i].i_pixel_pitch),
 503             abs(p_sys->p_proc_image->p[i].i_visible_lines));
 504
 505         p_sys->p_cv_image[i] = cvCreateImageHeader(sz, IPL_DEPTH_8U,
 506             p_sys->p_proc_image->p[i].i_pixel_pitch);
 507
 508         cvSetData( p_sys->p_cv_image[i],
 509             (char*)(p_sys->p_proc_image->p[i].p_pixels), p_sys->p_proc_image->p[i].i_pitch );
 510     }
 511
 512     //Hack the above opencv image array into a picture_t so that it can be sent to
 513     //another video filter
 514     p_sys->hacked_pic.p_data_orig = p_sys->p_cv_image;
 515     p_sys->hacked_pic.i_planes = planes;
 516     p_sys->hacked_pic.format.i_chroma = fmt_out.i_chroma;
 517
 518     //calculate duration of conversion
 519     finish = clock();
 520     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 521     if (p_sys->i_verbosity > VERB_WARN)
 522         msg_Dbg( p_vout, "VlcPictureToIplImageRgb took %2.4f seconds", duration );
 523 }
 524
 525 /*****************************************************************************
 526  * Render: displays previously rendered output
 527  *****************************************************************************
 528  * This function send the currently rendered image to the internal opencv
 529  * filter for processing.
 530  *****************************************************************************/
 531 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 532 {
 533     picture_t *p_outpic = NULL;
 534     clock_t start, finish;
 535     double  duration;
 536
 537     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 538               == NULL )
 539     {
 540         if( !vlc_object_alive (p_vout) || p_vout->b_error )
 541         {   return; }
 542         msleep( VOUT_OUTMEM_SLEEP );
 543     }
 544
 545     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 546
 547     start = clock();
 548
 549     if (p_vout->p_sys->i_wrapper_output == VINPUT)  //output = input video
 550     {
 551         //This copy is a bit unfortunate but image_Convert can't write into an existing image so it is better to copy the
 552         //(say) 16bit YUV image here than a 32bit RGB image somehwere else.
 553         //It is also not that expensive in time.
 554         picture_Copy( p_outpic, p_pic );
 555         VlcPictureToIplImage( p_vout, p_pic);
 556         //pass the image to the internal opencv filter for processing
 557         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 558             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 559     }
 560     else    //output = processed video (NONE option not working yet)
 561     {
 562         VlcPictureToIplImage( p_vout, p_pic);
 563         //pass the image to the internal opencv filter for processing
 564         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 565             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 566         //copy the processed image into the output image
 567         if ((p_vout->p_sys->p_proc_image) && (p_vout->p_sys->p_proc_image->p_data))
 568             picture_Copy( p_outpic, p_vout->p_sys->p_proc_image );
 569     }
 570
 571     //calculate duration
 572     finish = clock();
 573     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 574     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 575         msg_Dbg( p_vout, "Render took %2.4f seconds", duration );
 576
 577     ReleaseImages(p_vout);
 578     p_outpic->date  = p_pic->date;
 579
 580     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 581     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 582 }
 583