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     psz_chroma = var_InheritString( p_vout, "opencv-chroma" );
 211     if( psz_chroma == NULL )
 212     {
 213         msg_Err( p_vout, "configuration variable %s empty, using 'grey'",
 214                          "opencv-chroma" );
 215         p_vout->p_sys->i_internal_chroma = GREY;
 216     }
 217     else
 218     {
 219         if( !strcmp( psz_chroma, "input" ) )
 220             p_vout->p_sys->i_internal_chroma = CINPUT;
 221         else if( !strcmp( psz_chroma, "I420" ) )
 222             p_vout->p_sys->i_internal_chroma = GREY;
 223         else if( !strcmp( psz_chroma, "RGB32" ) )
 224             p_vout->p_sys->i_internal_chroma = RGB;
 225         else
 226         {
 227             msg_Err( p_vout, "no valid opencv-chroma provided, using 'grey'" );
 228             p_vout->p_sys->i_internal_chroma = GREY;
 229         }
 230     }
 231     free( psz_chroma);
 232
 233     psz_output = var_InheritString( p_vout, "opencv-output" );
 234     if( psz_output == NULL )
 235     {
 236         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 237                          "opencv-output" );
 238         p_vout->p_sys->i_wrapper_output = VINPUT;
 239     }
 240     else
 241     {
 242         if( !strcmp( psz_output, "none" ) )
 243             p_vout->p_sys->i_wrapper_output = NONE;
 244         else if( !strcmp( psz_output, "input" ) )
 245             p_vout->p_sys->i_wrapper_output = VINPUT;
 246         else if( !strcmp( psz_output, "processed" ) )
 247             p_vout->p_sys->i_wrapper_output = PROCESSED;
 248         else
 249         {
 250             msg_Err( p_vout, "no valid opencv-output provided, using 'input'" );
 251             p_vout->p_sys->i_wrapper_output = VINPUT;
 252         }
 253     }
 254     free( psz_output);
 255
 256     psz_verbosity = var_InheritString( p_vout, "opencv-verbosity" );
 257     if( psz_verbosity == NULL )
 258     {
 259         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 260                          "opencv-verbosity" );
 261         p_vout->p_sys->i_verbosity = VERB_ERROR;
 262     }
 263     else
 264     {
 265         if( !strcmp( psz_verbosity, "error" ) )
 266             p_vout->p_sys->i_verbosity = VERB_ERROR;
 267         else if( !strcmp( psz_verbosity, "warning" ) )
 268             p_vout->p_sys->i_verbosity = VERB_WARN;
 269         else if( !strcmp( psz_verbosity, "debug" ) )
 270             p_vout->p_sys->i_verbosity = VERB_DEBUG;
 271         else
 272         {
 273             msg_Err( p_vout, "no valid opencv-verbosity provided, using 'error'" );
 274             p_vout->p_sys->i_verbosity = VERB_ERROR;
 275         }
 276     }
 277     free( psz_verbosity);
 278
 279     p_vout->p_sys->psz_inner_name =
 280         var_InheritString( p_vout, "opencv-filter-name" );
 281     p_vout->p_sys->f_scale =
 282         var_InheritFloat( p_vout, "opencv-scale" );
 283
 284     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 285         msg_Info(p_vout, "Configuration: opencv-scale: %f, opencv-chroma: %d, "
 286             "opencv-output: %d, opencv-verbosity %d, opencv-filter %s",
 287             p_vout->p_sys->f_scale,
 288             p_vout->p_sys->i_internal_chroma,
 289             p_vout->p_sys->i_wrapper_output,
 290             p_vout->p_sys->i_verbosity,
 291             p_vout->p_sys->psz_inner_name);
 292
 293     return VLC_SUCCESS;
 294 }
 295
 296 /*****************************************************************************
 297  * Init: initialize opencv_wrapper video thread output method
 298  *****************************************************************************/
 299 static int Init( vout_thread_t *p_vout )
 300 {
 301     video_format_t fmt;
 302     vout_sys_t *p_sys = p_vout->p_sys;
 303     I_OUTPUTPICTURES = 0;
 304
 305     /* Initialize the output video format */
 306     memset( &fmt, 0, sizeof(video_format_t) );
 307     p_vout->output.i_chroma = p_vout->render.i_chroma;
 308     p_vout->output.i_width  = p_vout->render.i_width;
 309     p_vout->output.i_height = p_vout->render.i_height;
 310     p_vout->output.i_aspect = p_vout->render.i_aspect;
 311     p_vout->fmt_out = p_vout->fmt_in;           //set to input video format
 312
 313     fmt = p_vout->fmt_out;
 314     if (p_sys->i_wrapper_output == PROCESSED)   //set to processed video format
 315     {
 316         fmt.i_width = fmt.i_width * p_sys->f_scale;
 317         fmt.i_height = fmt.i_height * p_sys->f_scale;
 318         fmt.i_visible_width = fmt.i_visible_width * p_sys->f_scale;
 319         fmt.i_visible_height = fmt.i_visible_height * p_sys->f_scale;
 320         fmt.i_x_offset = fmt.i_x_offset * p_sys->f_scale;
 321         fmt.i_y_offset = fmt.i_y_offset * p_sys->f_scale;
 322
 323         if (p_sys->i_internal_chroma == GREY)
 324             fmt.i_chroma = VLC_CODEC_I420;
 325         else if (p_sys->i_internal_chroma == RGB)
 326             fmt.i_chroma = VLC_CODEC_RGB32;
 327     }
 328
 329     /* Load the internal opencv filter */
 330     /* We don't need to set up video formats for this filter as it not actually using a picture_t */
 331     p_sys->p_opencv = vlc_object_create( p_vout, sizeof(filter_t) );
 332     vlc_object_attach( p_sys->p_opencv, p_vout );
 333
 334     if (p_vout->p_sys->psz_inner_name)
 335         p_sys->p_opencv->p_module =
 336             module_need( p_sys->p_opencv, p_sys->psz_inner_name, NULL, false );
 337
 338     if( !p_sys->p_opencv->p_module )
 339     {
 340         msg_Err( p_vout, "can't open internal opencv filter: %s", p_vout->p_sys->psz_inner_name );
 341         p_vout->p_sys->psz_inner_name = NULL;
 342         vlc_object_detach( p_sys->p_opencv );
 343         vlc_object_release( p_sys->p_opencv );
 344         p_sys->p_opencv = NULL;
 345     }
 346
 347     /* Try to open the real video output */
 348     if (p_sys->i_verbosity > VERB_WARN)
 349         msg_Dbg( p_vout, "spawning the real video output" );
 350
 351     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 352
 353     /* Everything failed */
 354     if( p_vout->p_sys->p_vout == NULL )
 355     {
 356         msg_Err( p_vout, "can't open vout, aborting" );
 357         return VLC_EGENERIC;
 358     }
 359
 360     vout_filter_AllocateDirectBuffers( p_vout, VOUT_MAX_PICTURES );
 361
 362     vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, NULL );
 363
 364     return VLC_SUCCESS;
 365 }
 366
 367 /*****************************************************************************
 368  * End: terminate opencv_wrapper video thread output method
 369  *****************************************************************************/
 370 static void End( vout_thread_t *p_vout )
 371 {
 372     vout_sys_t *p_sys = p_vout->p_sys;
 373
 374     vout_filter_DelChild( p_vout, p_sys->p_vout, NULL );
 375     vout_CloseAndRelease( p_sys->p_vout );
 376
 377     vout_filter_ReleaseDirectBuffers( p_vout );
 378
 379     if( p_sys->p_opencv )
 380     {
 381         //release the internal opencv filter
 382         if( p_sys->p_opencv->p_module )
 383             module_unneed( p_sys->p_opencv, p_sys->p_opencv->p_module );
 384         vlc_object_detach( p_sys->p_opencv );
 385         vlc_object_release( p_sys->p_opencv );
 386         p_sys->p_opencv = NULL;
 387     }
 388 }
 389
 390 /*****************************************************************************
 391  * Destroy: destroy opencv_wrapper video thread output method
 392  *****************************************************************************
 393  * Terminate an output method created by opencv_wrapperCreateOutputMethod
 394  *****************************************************************************/
 395 static void Destroy( vlc_object_t *p_this )
 396 {
 397     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 398
 399     ReleaseImages(p_vout);
 400
 401     if( p_vout->p_sys->p_image )
 402         image_HandlerDelete( p_vout->p_sys->p_image );
 403
 404     free( p_vout->p_sys );
 405 }
 406
 407 /*****************************************************************************
 408  * ReleaseImages: Release OpenCV images in vout_sys_t.
 409  *****************************************************************************/
 410 static void ReleaseImages(vout_thread_t *p_vout)
 411 {
 412     int i = 0;
 413     if (p_vout->p_sys->p_cv_image)
 414     {
 415         for (i = 0; i < VOUT_MAX_PLANES; i++)
 416         {
 417             if (p_vout->p_sys->p_cv_image[i])
 418                 cvReleaseImageHeader(&(p_vout->p_sys->p_cv_image[i]));
 419             p_vout->p_sys->p_cv_image[i] = NULL;
 420         }
 421     }
 422     p_vout->p_sys->i_cv_image_size = 0;
 423
 424     /* Release temp picture_t if it exists */
 425     if (p_vout->p_sys->p_to_be_freed)
 426     {
 427         picture_Release( p_vout->p_sys->p_to_be_freed );
 428         p_vout->p_sys->p_to_be_freed = NULL;
 429     }
 430     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 431         msg_Dbg( p_vout, "images released" );
 432 }
 433
 434 /*****************************************************************************
 435  * VlcPictureToIplImage: Convert picture_t to IplImage
 436  *****************************************************************************
 437  * Converts given picture_t into IplImage(s) according to module config.
 438  * IplImage(s) are stored in vout_sys_t.
 439  *****************************************************************************/
 440 static void VlcPictureToIplImage( vout_thread_t *p_vout, picture_t *p_in )
 441 {
 442     int planes = p_in->i_planes;    //num input video planes
 443     // input video size
 444     CvSize sz = cvSize(abs(p_in->format.i_width), abs(p_in->format.i_height));
 445     video_format_t fmt_out;
 446     clock_t start, finish;  //performance measures
 447     double  duration;
 448     int i = 0;
 449     vout_sys_t* p_sys = p_vout->p_sys;
 450
 451     memset( &fmt_out, 0, sizeof(video_format_t) );
 452
 453     start = clock();
 454
 455     //do scale / color conversion according to p_sys config
 456     if ((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 457     {
 458         fmt_out = p_in->format;
 459
 460         //calc the scaled video size
 461         fmt_out.i_width = p_in->format.i_width * p_sys->f_scale;
 462         fmt_out.i_height = p_in->format.i_height * p_sys->f_scale;
 463
 464         if (p_sys->i_internal_chroma == RGB)
 465         {
 466             //rgb2 gives 3 separate planes, this gives 1 interleaved plane
 467             //rv24 gives is about 20% faster but gives r&b the wrong way round
 468             //and I cant think of an easy way to fix this
 469             fmt_out.i_chroma = VLC_CODEC_RGB32;
 470         }
 471         else if (p_sys->i_internal_chroma == GREY)
 472         {
 473             //take the I (gray) plane (video seems to commonly be in this fmt so usually the
 474             //conversion does nothing)
 475             fmt_out.i_chroma = VLC_CODEC_I420;
 476         }
 477
 478         //convert from the input image
 479         p_sys->p_proc_image = image_Convert( p_sys->p_image, p_in,
 480                                      &(p_in->format), &fmt_out );
 481
 482         if (!p_sys->p_proc_image)
 483         {
 484             msg_Err(p_vout, "can't convert (unsupported formats?), aborting...");
 485             return;
 486         }
 487
 488         p_sys->p_to_be_freed = p_sys->p_proc_image;    //remember this so we can free it later
 489
 490     }
 491     else    //((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 492     {
 493         //use the input image without conversion
 494         p_sys->p_proc_image = p_in;
 495     }
 496
 497     //Convert to the IplImage array that is to be processed.
 498     //If there are multiple planes in p_sys->p_proc_image, then 1 IplImage
 499     //is created for each plane.
 500     planes = p_sys->p_proc_image->i_planes;
 501     p_sys->i_cv_image_size = planes;
 502     for ( i = 0; i < planes; i++ )
 503     {
 504         sz = cvSize(abs(p_sys->p_proc_image->p[i].i_visible_pitch /
 505             p_sys->p_proc_image->p[i].i_pixel_pitch),
 506             abs(p_sys->p_proc_image->p[i].i_visible_lines));
 507
 508         p_sys->p_cv_image[i] = cvCreateImageHeader(sz, IPL_DEPTH_8U,
 509             p_sys->p_proc_image->p[i].i_pixel_pitch);
 510
 511         cvSetData( p_sys->p_cv_image[i],
 512             (char*)(p_sys->p_proc_image->p[i].p_pixels), p_sys->p_proc_image->p[i].i_pitch );
 513     }
 514
 515     //Hack the above opencv image array into a picture_t so that it can be sent to
 516     //another video filter
 517     p_sys->hacked_pic.p_data_orig = p_sys->p_cv_image;
 518     p_sys->hacked_pic.i_planes = planes;
 519     p_sys->hacked_pic.format.i_chroma = fmt_out.i_chroma;
 520
 521     //calculate duration of conversion
 522     finish = clock();
 523     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 524     if (p_sys->i_verbosity > VERB_WARN)
 525         msg_Dbg( p_vout, "VlcPictureToIplImageRgb took %2.4f seconds", duration );
 526 }
 527
 528 /*****************************************************************************
 529  * Render: displays previously rendered output
 530  *****************************************************************************
 531  * This function send the currently rendered image to the internal opencv
 532  * filter for processing.
 533  *****************************************************************************/
 534 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 535 {
 536     picture_t *p_outpic = NULL;
 537     clock_t start, finish;
 538     double  duration;
 539
 540     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 541               == NULL )
 542     {
 543         if( !vlc_object_alive (p_vout) || p_vout->b_error )
 544         {   return; }
 545         msleep( VOUT_OUTMEM_SLEEP );
 546     }
 547
 548     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 549
 550     start = clock();
 551
 552     if (p_vout->p_sys->i_wrapper_output == VINPUT)  //output = input video
 553     {
 554         //This copy is a bit unfortunate but image_Convert can't write into an existing image so it is better to copy the
 555         //(say) 16bit YUV image here than a 32bit RGB image somehwere else.
 556         //It is also not that expensive in time.
 557         picture_Copy( p_outpic, p_pic );
 558         VlcPictureToIplImage( p_vout, p_pic);
 559         //pass the image to the internal opencv filter for processing
 560         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 561             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 562     }
 563     else    //output = processed video (NONE option not working yet)
 564     {
 565         VlcPictureToIplImage( p_vout, p_pic);
 566         //pass the image to the internal opencv filter for processing
 567         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 568             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 569         //copy the processed image into the output image
 570         if ((p_vout->p_sys->p_proc_image) && (p_vout->p_sys->p_proc_image->p_data))
 571             picture_Copy( p_outpic, p_vout->p_sys->p_proc_image );
 572     }
 573
 574     //calculate duration
 575     finish = clock();
 576     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 577     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 578         msg_Dbg( p_vout, "Render took %2.4f seconds", duration );
 579
 580     ReleaseImages(p_vout);
 581     p_outpic->date  = p_pic->date;
 582
 583     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 584     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 585 }
 586