git.sesse.net Git - vlc/blob - modules/stream_out/mosaic_bridge.c

   1 /*****************************************************************************
   2  * mosaic_bridge.c:
   3  *****************************************************************************
   4  * Copyright (C) 2004-2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea@videolan.org>
   8  *          Christophe Massiot <massiot@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <stdlib.h>                                                /* free() */
  30 #include <string.h>                                            /* strerror() */
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc_sout.h>
  34 #include <vlc_block.h>
  35 #include <vlc_codec.h>
  36
  37 #include "vlc_image.h"
  38
  39 #include "../video_filter/mosaic.h"
  40
  41 /*****************************************************************************
  42  * Local structures
  43  *****************************************************************************/
  44 struct sout_stream_sys_t
  45 {
  46     bridged_es_t *p_es;
  47     vlc_mutex_t *p_lock;
  48
  49     decoder_t       *p_decoder;
  50     image_handler_t *p_image; /* filter for resizing */
  51     int i_height, i_width;
  52     unsigned int i_sar_num, i_sar_den;
  53     char *psz_id;
  54     vlc_bool_t b_inited;
  55
  56     picture_t *p_mask;
  57 };
  58
  59 #define PICTURE_RING_SIZE 4
  60 struct decoder_owner_sys_t
  61 {
  62     picture_t *pp_pics[PICTURE_RING_SIZE];
  63
  64     /* Current format in use by the output */
  65     video_format_t video;
  66 };
  67
  68 typedef void (* pf_release_t)( picture_t * );
  69 static void ReleasePicture( picture_t *p_pic )
  70 {
  71     p_pic->i_refcount--;
  72
  73     if ( p_pic->i_refcount <= 0 )
  74     {
  75         if ( p_pic->p_sys != NULL )
  76         {
  77             pf_release_t pf_release = (pf_release_t)p_pic->p_sys;
  78             p_pic->p_sys = NULL;
  79             pf_release( p_pic );
  80         }
  81         else
  82         {
  83             if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
  84             if( p_pic ) free( p_pic );
  85         }
  86     }
  87 }
  88
  89 /* copied from video_filters/erase.c . Gruik ? */
  90 static void LoadMask( sout_stream_t *p_stream, const char *psz_filename )
  91 {
  92     image_handler_t *p_image;
  93     video_format_t fmt_in, fmt_out;
  94     memset( &fmt_in, 0, sizeof( video_format_t ) );
  95     memset( &fmt_out, 0, sizeof( video_format_t ) );
  96     fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
  97     if( p_stream->p_sys->p_mask )
  98         p_stream->p_sys->p_mask->pf_release( p_stream->p_sys->p_mask );
  99     p_image = image_HandlerCreate( p_stream );
 100     p_stream->p_sys->p_mask =
 101         image_ReadUrl( p_image, psz_filename, &fmt_in, &fmt_out );
 102     image_HandlerDelete( p_image );
 103 }
 104
 105 /*****************************************************************************
 106  * Local prototypes
 107  *****************************************************************************/
 108 static int  Open    ( vlc_object_t * );
 109 static void Close   ( vlc_object_t * );
 110 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
 111 static int               Del ( sout_stream_t *, sout_stream_id_t * );
 112 static int               Send( sout_stream_t *, sout_stream_id_t *, block_t * );
 113
 114 static void video_del_buffer( decoder_t *, picture_t * );
 115 static picture_t *video_new_buffer( decoder_t * );
 116 static void video_link_picture_decoder( decoder_t *, picture_t * );
 117 static void video_unlink_picture_decoder( decoder_t *, picture_t * );
 118
 119 /*****************************************************************************
 120  * Module descriptor
 121  *****************************************************************************/
 122 #define ID_TEXT N_("ID")
 123 #define ID_LONGTEXT N_( \
 124     "Specify an identifier string for this subpicture" )
 125
 126 #define WIDTH_TEXT N_("Video width")
 127 #define WIDTH_LONGTEXT N_( \
 128     "Output video width." )
 129 #define HEIGHT_TEXT N_("Video height")
 130 #define HEIGHT_LONGTEXT N_( \
 131     "Output video height." )
 132 #define RATIO_TEXT N_("Sample aspect ratio")
 133 #define RATIO_LONGTEXT N_( \
 134     "Sample aspect ratio of the destination (1:1, 3:4, 2:3)." )
 135 #define MASK_TEXT N_("Transparency mask")
 136 #define MASK_LONGTEXT N_( \
 137     "Alpha blending transparency mask. Use's a png alpha channel.")
 138
 139 #define SOUT_CFG_PREFIX "sout-mosaic-bridge-"
 140
 141 vlc_module_begin();
 142     set_shortname( _( "Mosaic bridge" ) );
 143     set_description(_("Mosaic bridge stream output") );
 144     set_capability( "sout stream", 0 );
 145     add_shortcut( "mosaic-bridge" );
 146
 147     add_string( SOUT_CFG_PREFIX "id", "Id", NULL, ID_TEXT, ID_LONGTEXT,
 148                 VLC_FALSE );
 149     add_integer( SOUT_CFG_PREFIX "width", 0, NULL, WIDTH_TEXT,
 150                  WIDTH_LONGTEXT, VLC_TRUE );
 151     add_integer( SOUT_CFG_PREFIX "height", 0, NULL, HEIGHT_TEXT,
 152                  HEIGHT_LONGTEXT, VLC_TRUE );
 153     add_string( SOUT_CFG_PREFIX "sar", "1:1", NULL, RATIO_TEXT,
 154                 RATIO_LONGTEXT, VLC_FALSE );
 155     add_string( SOUT_CFG_PREFIX "mask", NULL, NULL, MASK_TEXT,
 156                 MASK_LONGTEXT, VLC_FALSE );
 157
 158     set_callbacks( Open, Close );
 159
 160     var_Create( p_module->p_libvlc_global, "mosaic-lock", VLC_VAR_MUTEX );
 161 vlc_module_end();
 162
 163 static const char *ppsz_sout_options[] = {
 164     "id", "width", "height", "sar", "mask", NULL
 165 };
 166
 167 /*****************************************************************************
 168  * Open
 169  *****************************************************************************/
 170 static int Open( vlc_object_t *p_this )
 171 {
 172     sout_stream_t     *p_stream = (sout_stream_t *)p_this;
 173     sout_stream_sys_t *p_sys;
 174     libvlc_global_data_t *p_libvlc_global = p_this->p_libvlc_global;
 175     vlc_value_t val;
 176
 177     config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
 178                    p_stream->p_cfg );
 179
 180     p_sys          = malloc( sizeof( sout_stream_sys_t ) );
 181     p_stream->p_sys = p_sys;
 182     p_sys->b_inited = VLC_FALSE;
 183
 184     var_Get( p_libvlc_global, "mosaic-lock", &val );
 185     p_sys->p_lock = val.p_address;
 186
 187     var_Get( p_stream, SOUT_CFG_PREFIX "id", &val );
 188     p_sys->psz_id = val.psz_string;
 189
 190     var_Get( p_stream, SOUT_CFG_PREFIX "height", &val );
 191     p_sys->i_height = val.i_int;
 192
 193     var_Get( p_stream, SOUT_CFG_PREFIX "width", &val );
 194     p_sys->i_width = val.i_int;
 195
 196     var_Get( p_stream, SOUT_CFG_PREFIX "mask", &val );
 197     if( val.psz_string && *val.psz_string )
 198     {
 199         p_sys->p_mask = NULL;
 200         LoadMask( p_stream, val.psz_string );
 201         if( !p_sys->p_mask )
 202             msg_Err( p_stream, "Error while loading mask (%s).",
 203                      val.psz_string );
 204     }
 205     else
 206         p_sys->p_mask = NULL;
 207     free( val.psz_string );
 208
 209     var_Get( p_stream, SOUT_CFG_PREFIX "sar", &val );
 210     if ( val.psz_string )
 211     {
 212         char *psz_parser = strchr( val.psz_string, ':' );
 213
 214         if( psz_parser )
 215         {
 216             *psz_parser++ = '\0';
 217             p_sys->i_sar_num = atoi( val.psz_string );
 218             p_sys->i_sar_den = atoi( psz_parser );
 219             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 220                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 221         }
 222         else
 223         {
 224             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 225             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 226         }
 227
 228         free( val.psz_string );
 229     }
 230     else
 231     {
 232         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 233     }
 234
 235     p_stream->pf_add    = Add;
 236     p_stream->pf_del    = Del;
 237     p_stream->pf_send   = Send;
 238
 239     p_stream->p_sout->i_out_pace_nocontrol++;
 240
 241     return VLC_SUCCESS;
 242 }
 243
 244 /*****************************************************************************
 245  * Close
 246  *****************************************************************************/
 247 static void Close( vlc_object_t * p_this )
 248 {
 249     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 250     sout_stream_sys_t *p_sys = p_stream->p_sys;
 251
 252     p_stream->p_sout->i_out_pace_nocontrol--;
 253
 254     if ( p_sys->psz_id )
 255         free( p_sys->psz_id );
 256
 257     free( p_sys );
 258 }
 259
 260 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 261 {
 262     sout_stream_sys_t *p_sys = p_stream->p_sys;
 263     bridge_t *p_bridge;
 264     bridged_es_t *p_es;
 265     int i;
 266
 267     if ( p_sys->b_inited )
 268     {
 269         return NULL;
 270     }
 271
 272     /* Create decoder object */
 273     p_sys->p_decoder = vlc_object_create( p_stream, VLC_OBJECT_DECODER );
 274     vlc_object_attach( p_sys->p_decoder, p_stream );
 275     p_sys->p_decoder->p_module = NULL;
 276     p_sys->p_decoder->fmt_in = *p_fmt;
 277     p_sys->p_decoder->b_pace_control = VLC_FALSE;
 278     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 279     p_sys->p_decoder->fmt_out.i_extra = 0;
 280     p_sys->p_decoder->fmt_out.p_extra = 0;
 281     p_sys->p_decoder->pf_decode_video = 0;
 282     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer;
 283     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer;
 284     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 285     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 286     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 287     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 288         p_sys->p_decoder->p_owner->pp_pics[i] = 0;
 289     p_sys->p_decoder->p_owner->video = p_fmt->video;
 290     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 291
 292     p_sys->p_decoder->p_module =
 293         module_Need( p_sys->p_decoder, "decoder", "$codec", 0 );
 294
 295     if( !p_sys->p_decoder->p_module )
 296     {
 297         msg_Err( p_stream, "cannot find decoder" );
 298         vlc_object_detach( p_sys->p_decoder );
 299         vlc_object_destroy( p_sys->p_decoder );
 300         return NULL;
 301     }
 302
 303     p_sys->b_inited = VLC_TRUE;
 304     vlc_mutex_lock( p_sys->p_lock );
 305
 306     p_bridge = GetBridge( p_stream );
 307     if ( p_bridge == NULL )
 308     {
 309         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 310         vlc_value_t val;
 311
 312         p_bridge = malloc( sizeof( bridge_t ) );
 313
 314         var_Create( p_libvlc_global, "mosaic-struct", VLC_VAR_ADDRESS );
 315         val.p_address = p_bridge;
 316         var_Set( p_libvlc_global, "mosaic-struct", val );
 317
 318         p_bridge->i_es_num = 0;
 319         p_bridge->pp_es = NULL;
 320     }
 321
 322     for ( i = 0; i < p_bridge->i_es_num; i++ )
 323     {
 324         if ( p_bridge->pp_es[i]->b_empty )
 325             break;
 326     }
 327
 328     if ( i == p_bridge->i_es_num )
 329     {
 330         p_bridge->pp_es = realloc( p_bridge->pp_es,
 331                                    (p_bridge->i_es_num + 1)
 332                                      * sizeof(bridged_es_t *) );
 333         p_bridge->i_es_num++;
 334         p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
 335     }
 336
 337     p_sys->p_es = p_es = p_bridge->pp_es[i];
 338
 339     //p_es->fmt = *p_fmt;
 340     p_es->psz_id = p_sys->psz_id;
 341     p_es->p_picture = NULL;
 342     p_es->pp_last = &p_es->p_picture;
 343     p_es->b_empty = VLC_FALSE;
 344
 345     vlc_mutex_unlock( p_sys->p_lock );
 346
 347     if ( p_sys->i_height || p_sys->i_width )
 348     {
 349         p_sys->p_image = image_HandlerCreate( p_stream );
 350     }
 351
 352     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 353
 354     return (sout_stream_id_t *)p_sys;
 355 }
 356
 357 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 358 {
 359     sout_stream_sys_t *p_sys = p_stream->p_sys;
 360     bridge_t *p_bridge;
 361     bridged_es_t *p_es;
 362     vlc_bool_t b_last_es = VLC_TRUE;
 363     int i;
 364
 365     if ( !p_sys->b_inited )
 366     {
 367         return VLC_SUCCESS;
 368     }
 369
 370     if ( p_sys->p_decoder != NULL )
 371     {
 372         picture_t **pp_ring = p_sys->p_decoder->p_owner->pp_pics;
 373
 374         if( p_sys->p_decoder->p_module )
 375             module_Unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 376         vlc_object_detach( p_sys->p_decoder );
 377         vlc_object_destroy( p_sys->p_decoder );
 378
 379         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 380         {
 381             if ( pp_ring[i] != NULL )
 382             {
 383                 if ( pp_ring[i]->p_data_orig != NULL )
 384                     free( pp_ring[i]->p_data_orig );
 385                 free( pp_ring[i]->p_sys );
 386                 free( pp_ring[i] );
 387             }
 388         }
 389     }
 390
 391     vlc_mutex_lock( p_sys->p_lock );
 392
 393     p_bridge = GetBridge( p_stream );
 394     p_es = p_sys->p_es;
 395
 396     p_es->b_empty = VLC_TRUE;
 397     while ( p_es->p_picture )
 398     {
 399         picture_t *p_next = p_es->p_picture->p_next;
 400         p_es->p_picture->pf_release( p_es->p_picture );
 401         p_es->p_picture = p_next;
 402     }
 403
 404     for ( i = 0; i < p_bridge->i_es_num; i++ )
 405     {
 406         if ( !p_bridge->pp_es[i]->b_empty )
 407         {
 408             b_last_es = VLC_FALSE;
 409             break;
 410         }
 411     }
 412
 413     if ( b_last_es )
 414     {
 415         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 416         for ( i = 0; i < p_bridge->i_es_num; i++ )
 417             free( p_bridge->pp_es[i] );
 418         free( p_bridge->pp_es );
 419         free( p_bridge );
 420         var_Destroy( p_libvlc_global, "mosaic-struct" );
 421     }
 422
 423     vlc_mutex_unlock( p_sys->p_lock );
 424
 425     if ( p_sys->i_height || p_sys->i_width )
 426     {
 427         image_HandlerDelete( p_sys->p_image );
 428     }
 429
 430     p_sys->b_inited = VLC_FALSE;
 431
 432     return VLC_SUCCESS;
 433 }
 434
 435 /*****************************************************************************
 436  * PushPicture : push a picture in the mosaic-struct structure
 437  *****************************************************************************/
 438 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 439 {
 440     sout_stream_sys_t *p_sys = p_stream->p_sys;
 441     bridged_es_t *p_es = p_sys->p_es;
 442
 443     vlc_mutex_lock( p_sys->p_lock );
 444
 445     *p_es->pp_last = p_picture;
 446     p_picture->p_next = NULL;
 447     p_es->pp_last = &p_picture->p_next;
 448
 449     vlc_mutex_unlock( p_sys->p_lock );
 450 }
 451
 452 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 453                  block_t *p_buffer )
 454 {
 455     sout_stream_sys_t *p_sys = p_stream->p_sys;
 456     picture_t *p_pic;
 457
 458     if ( (sout_stream_sys_t *)id != p_sys )
 459     {
 460         block_ChainRelease( p_buffer );
 461         return VLC_SUCCESS;
 462     }
 463
 464     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 465                                                         &p_buffer )) )
 466     {
 467         picture_t *p_new_pic;
 468
 469         if( p_sys->i_height || p_sys->i_width )
 470         {
 471             video_format_t fmt_out, fmt_in;
 472
 473             memset( &fmt_in, 0, sizeof(video_format_t) );
 474             memset( &fmt_out, 0, sizeof(video_format_t) );
 475             fmt_in = p_sys->p_decoder->fmt_out.video;
 476
 477             if( p_sys->p_mask )
 478                 fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 479             else
 480                 fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
 481
 482             if ( !p_sys->i_height )
 483             {
 484                 fmt_out.i_width = p_sys->i_width;
 485                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 486                     * p_sys->i_sar_num / p_sys->i_sar_den / fmt_in.i_aspect)
 487                       & ~0x1;
 488             }
 489             else if ( !p_sys->i_width )
 490             {
 491                 fmt_out.i_height = p_sys->i_height;
 492                 fmt_out.i_width = (p_sys->i_height * fmt_in.i_aspect
 493                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 494                       & ~0x1;
 495             }
 496             else
 497             {
 498                 fmt_out.i_width = p_sys->i_width;
 499                 fmt_out.i_height = p_sys->i_height;
 500             }
 501             fmt_out.i_visible_width = fmt_out.i_width;
 502             fmt_out.i_visible_height = fmt_out.i_height;
 503
 504             p_new_pic = image_Convert( p_sys->p_image,
 505                                        p_pic, &fmt_in, &fmt_out );
 506             if ( p_new_pic == NULL )
 507             {
 508                 msg_Err( p_stream, "image conversion failed" );
 509                 continue;
 510             }
 511
 512             if( p_sys->p_mask )
 513             {
 514                 plane_t *p_mask = p_sys->p_mask->p+A_PLANE;
 515                 plane_t *p_apic = p_new_pic->p+A_PLANE;
 516                 if(    p_mask->i_visible_pitch
 517                     != p_apic->i_visible_pitch
 518                     || p_mask->i_visible_lines
 519                     != p_apic->i_visible_lines )
 520                 {
 521                     msg_Warn( p_stream,
 522                               "Mask size (%d x %d) and image size (%d x %d) "
 523                               "don't match. The mask will not be applied.",
 524                               p_mask->i_visible_pitch,
 525                               p_mask->i_visible_lines,
 526                               p_apic->i_visible_pitch,
 527                               p_apic->i_visible_lines );
 528                 }
 529                 else
 530                 {
 531                     if( p_mask->i_pitch != p_apic->i_pitch
 532                     ||  p_mask->i_lines != p_apic->i_lines )
 533                     {
 534                         /* visible plane sizes match ... but not the undelying
 535                          * buffer. I'm not sure that this can happen,
 536                          * but better safe than sorry. */
 537                         int i_line;
 538                         int i_lines = p_mask->i_visible_lines;
 539                         uint8_t *p_src = p_mask->p_pixels;
 540                         uint8_t *p_dst = p_apic->p_pixels;
 541                         int i_src_pitch = p_mask->i_pitch;
 542                         int i_dst_pitch = p_apic->i_pitch;
 543                         int i_visible_pitch = p_mask->i_visible_pitch;
 544                         for( i_line = 0; i_line < i_lines; i_line++,
 545                              p_src += i_src_pitch, p_dst += i_dst_pitch )
 546                         {
 547                             p_stream->p_libvlc->pf_memcpy(
 548                                 p_dst, p_src, i_visible_pitch );
 549                         }
 550                     }
 551                     else
 552                     {
 553                         /* plane sizes match */
 554                         p_stream->p_libvlc->pf_memcpy(
 555                             p_apic->p_pixels, p_mask->p_pixels,
 556                             p_mask->i_pitch * p_mask->i_lines );
 557                     }
 558                 }
 559             }
 560         }
 561         else
 562         {
 563             p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
 564             vout_AllocatePicture( p_stream, p_new_pic, p_pic->format.i_chroma,
 565                                   p_pic->format.i_width, p_pic->format.i_height,
 566                                   p_sys->p_decoder->fmt_out.video.i_aspect );
 567
 568             vout_CopyPicture( p_stream, p_new_pic, p_pic );
 569         }
 570
 571         p_new_pic->i_refcount = 1;
 572         p_new_pic->i_status = DESTROYED_PICTURE;
 573         p_new_pic->i_type   = DIRECT_PICTURE;
 574         p_new_pic->p_sys = (picture_sys_t *)p_new_pic->pf_release;
 575         p_new_pic->pf_release = ReleasePicture;
 576         p_new_pic->date = p_pic->date;
 577
 578         p_pic->pf_release( p_pic );
 579         PushPicture( p_stream, p_new_pic );
 580     }
 581
 582     return VLC_SUCCESS;
 583 }
 584
 585 struct picture_sys_t
 586 {
 587     vlc_object_t *p_owner;
 588     vlc_bool_t b_dead;
 589 };
 590
 591 static void video_release_buffer( picture_t *p_pic )
 592 {
 593     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
 594     {
 595         video_del_buffer( (decoder_t *)p_pic->p_sys->p_owner, p_pic );
 596     }
 597     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
 598 }
 599
 600 static picture_t *video_new_buffer( decoder_t *p_dec )
 601 {
 602     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 603     picture_t **pp_ring = p_dec->p_owner->pp_pics;
 604     picture_t *p_pic;
 605     int i;
 606
 607     if( p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 608         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 609         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 610         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 611     {
 612         if( !p_dec->fmt_out.video.i_sar_num ||
 613             !p_dec->fmt_out.video.i_sar_den )
 614         {
 615             p_dec->fmt_out.video.i_sar_num =
 616               p_dec->fmt_out.video.i_aspect * p_dec->fmt_out.video.i_height;
 617
 618             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
 619               p_dec->fmt_out.video.i_width;
 620         }
 621
 622         vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
 623                      &p_dec->fmt_out.video.i_sar_den,
 624                      p_dec->fmt_out.video.i_sar_num,
 625                      p_dec->fmt_out.video.i_sar_den, 0 );
 626
 627         if( !p_dec->fmt_out.video.i_visible_width ||
 628             !p_dec->fmt_out.video.i_visible_height )
 629         {
 630             p_dec->fmt_out.video.i_visible_width =
 631                 p_dec->fmt_out.video.i_width;
 632             p_dec->fmt_out.video.i_visible_height =
 633                 p_dec->fmt_out.video.i_height;
 634         }
 635
 636         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 637         p_sys->video = p_dec->fmt_out.video;
 638
 639         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 640         {
 641             if ( pp_ring[i] != NULL )
 642             {
 643                 if ( pp_ring[i]->i_status == DESTROYED_PICTURE )
 644                 {
 645                     if ( pp_ring[i]->p_data_orig != NULL )
 646                         free( pp_ring[i]->p_data_orig );
 647                     free( pp_ring[i]->p_sys );
 648                     free( pp_ring[i] );
 649                 }
 650                 else
 651                 {
 652                     pp_ring[i]->p_sys->b_dead = VLC_TRUE;
 653                 }
 654                 pp_ring[i] = NULL;
 655             }
 656         }
 657     }
 658
 659     /* Find an empty space in the picture ring buffer */
 660     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 661     {
 662         if( pp_ring[i] != NULL && pp_ring[i]->i_status == DESTROYED_PICTURE )
 663         {
 664             pp_ring[i]->i_status = RESERVED_PICTURE;
 665             return pp_ring[i];
 666         }
 667     }
 668     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 669     {
 670         if( pp_ring[i] == NULL ) break;
 671     }
 672
 673     if( i == PICTURE_RING_SIZE )
 674     {
 675         msg_Err( p_dec, "decoder/filter is leaking pictures, "
 676                  "resetting its ring buffer" );
 677
 678         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 679         {
 680             pp_ring[i]->pf_release( pp_ring[i] );
 681         }
 682
 683         i = 0;
 684     }
 685
 686     p_pic = malloc( sizeof(picture_t) );
 687     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 688     vout_AllocatePicture( VLC_OBJECT(p_dec), p_pic,
 689                           p_dec->fmt_out.video.i_chroma,
 690                           p_dec->fmt_out.video.i_width,
 691                           p_dec->fmt_out.video.i_height,
 692                           p_dec->fmt_out.video.i_aspect );
 693
 694     if( !p_pic->i_planes )
 695     {
 696         free( p_pic );
 697         return NULL;
 698     }
 699
 700     p_pic->pf_release = video_release_buffer;
 701     p_pic->p_sys = malloc( sizeof(picture_sys_t) );
 702     p_pic->p_sys->p_owner = VLC_OBJECT(p_dec);
 703     p_pic->p_sys->b_dead = VLC_FALSE;
 704     p_pic->i_status = RESERVED_PICTURE;
 705
 706     pp_ring[i] = p_pic;
 707
 708     return p_pic;
 709 }
 710
 711 static void video_del_buffer( decoder_t *p_this, picture_t *p_pic )
 712 {
 713     p_pic->i_refcount = 0;
 714     p_pic->i_status = DESTROYED_PICTURE;
 715     if ( p_pic->p_sys->b_dead )
 716     {
 717         if ( p_pic->p_data_orig != NULL )
 718             free( p_pic->p_data_orig );
 719         free( p_pic->p_sys );
 720         free( p_pic );
 721     }
 722 }
 723
 724 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 725 {
 726     p_pic->i_refcount++;
 727 }
 728
 729 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 730 {
 731     video_release_buffer( p_pic );
 732 }
 733