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
  57 #define PICTURE_RING_SIZE 4
  58 struct decoder_owner_sys_t
  59 {
  60     picture_t *pp_pics[PICTURE_RING_SIZE];
  61
  62     /* Current format in use by the output */
  63     video_format_t video;
  64 };
  65
  66 typedef void (* pf_release_t)( picture_t * );
  67 static void ReleasePicture( picture_t *p_pic )
  68 {
  69     p_pic->i_refcount--;
  70
  71     if ( p_pic->i_refcount <= 0 )
  72     {
  73         if ( p_pic->p_sys != NULL )
  74         {
  75             pf_release_t pf_release = (pf_release_t)p_pic->p_sys;
  76             p_pic->p_sys = NULL;
  77             pf_release( p_pic );
  78         }
  79         else
  80         {
  81             if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
  82             if( p_pic ) free( p_pic );
  83         }
  84     }
  85 }
  86
  87 /*****************************************************************************
  88  * Local prototypes
  89  *****************************************************************************/
  90 static int  Open    ( vlc_object_t * );
  91 static void Close   ( vlc_object_t * );
  92 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
  93 static int               Del ( sout_stream_t *, sout_stream_id_t * );
  94 static int               Send( sout_stream_t *, sout_stream_id_t *, block_t * );
  95
  96 static void video_del_buffer( decoder_t *, picture_t * );
  97 static picture_t *video_new_buffer( decoder_t * );
  98 static void video_link_picture_decoder( decoder_t *, picture_t * );
  99 static void video_unlink_picture_decoder( decoder_t *, picture_t * );
 100
 101 /*****************************************************************************
 102  * Module descriptor
 103  *****************************************************************************/
 104 #define ID_TEXT N_("ID")
 105 #define ID_LONGTEXT N_( \
 106     "Specify an identifier string for this subpicture" )
 107
 108 #define WIDTH_TEXT N_("Video width")
 109 #define WIDTH_LONGTEXT N_( \
 110     "Output video width." )
 111 #define HEIGHT_TEXT N_("Video height")
 112 #define HEIGHT_LONGTEXT N_( \
 113     "Output video height." )
 114 #define RATIO_TEXT N_("Sample aspect ratio")
 115 #define RATIO_LONGTEXT N_( \
 116     "Sample aspect ratio of the destination (1:1, 3:4, 2:3)." )
 117
 118 #define SOUT_CFG_PREFIX "sout-mosaic-bridge-"
 119
 120 vlc_module_begin();
 121     set_shortname( _( "Mosaic bridge" ) );
 122     set_description(_("Mosaic bridge stream output") );
 123     set_capability( "sout stream", 0 );
 124     add_shortcut( "mosaic-bridge" );
 125
 126     add_string( SOUT_CFG_PREFIX "id", "Id", NULL, ID_TEXT, ID_LONGTEXT,
 127                 VLC_FALSE );
 128     add_integer( SOUT_CFG_PREFIX "width", 0, NULL, WIDTH_TEXT,
 129                  WIDTH_LONGTEXT, VLC_TRUE );
 130     add_integer( SOUT_CFG_PREFIX "height", 0, NULL, HEIGHT_TEXT,
 131                  HEIGHT_LONGTEXT, VLC_TRUE );
 132     add_string( SOUT_CFG_PREFIX "sar", "1:1", NULL, RATIO_TEXT,
 133                 RATIO_LONGTEXT, VLC_FALSE );
 134
 135     set_callbacks( Open, Close );
 136
 137     var_Create( p_module->p_libvlc_global, "mosaic-lock", VLC_VAR_MUTEX );
 138 vlc_module_end();
 139
 140 static const char *ppsz_sout_options[] = {
 141     "id", "width", "height", "sar", NULL
 142 };
 143
 144 /*****************************************************************************
 145  * Open
 146  *****************************************************************************/
 147 static int Open( vlc_object_t *p_this )
 148 {
 149     sout_stream_t     *p_stream = (sout_stream_t *)p_this;
 150     sout_stream_sys_t *p_sys;
 151     libvlc_global_data_t *p_libvlc_global = p_this->p_libvlc_global;
 152     vlc_value_t val;
 153
 154     config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
 155                    p_stream->p_cfg );
 156
 157     p_sys          = malloc( sizeof( sout_stream_sys_t ) );
 158     p_stream->p_sys = p_sys;
 159     p_sys->b_inited = VLC_FALSE;
 160
 161     var_Get( p_libvlc_global, "mosaic-lock", &val );
 162     p_sys->p_lock = val.p_address;
 163
 164     var_Get( p_stream, SOUT_CFG_PREFIX "id", &val );
 165     p_sys->psz_id = val.psz_string;
 166
 167     var_Get( p_stream, SOUT_CFG_PREFIX "height", &val );
 168     p_sys->i_height = val.i_int;
 169
 170     var_Get( p_stream, SOUT_CFG_PREFIX "width", &val );
 171     p_sys->i_width = val.i_int;
 172
 173     var_Get( p_stream, SOUT_CFG_PREFIX "sar", &val );
 174     if ( val.psz_string )
 175     {
 176         char *psz_parser = strchr( val.psz_string, ':' );
 177
 178         if( psz_parser )
 179         {
 180             *psz_parser++ = '\0';
 181             p_sys->i_sar_num = atoi( val.psz_string );
 182             p_sys->i_sar_den = atoi( psz_parser );
 183             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 184                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 185         }
 186         else
 187         {
 188             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 189             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 190         }
 191
 192         free( val.psz_string );
 193     }
 194     else
 195     {
 196         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 197     }
 198
 199     p_stream->pf_add    = Add;
 200     p_stream->pf_del    = Del;
 201     p_stream->pf_send   = Send;
 202
 203     p_stream->p_sout->i_out_pace_nocontrol++;
 204
 205     return VLC_SUCCESS;
 206 }
 207
 208 /*****************************************************************************
 209  * Close
 210  *****************************************************************************/
 211 static void Close( vlc_object_t * p_this )
 212 {
 213     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 214     sout_stream_sys_t *p_sys = p_stream->p_sys;
 215
 216     p_stream->p_sout->i_out_pace_nocontrol--;
 217
 218     if ( p_sys->psz_id )
 219         free( p_sys->psz_id );
 220
 221     free( p_sys );
 222 }
 223
 224 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 225 {
 226     sout_stream_sys_t *p_sys = p_stream->p_sys;
 227     bridge_t *p_bridge;
 228     bridged_es_t *p_es;
 229     int i;
 230
 231     if ( p_sys->b_inited )
 232     {
 233         return NULL;
 234     }
 235
 236     /* Create decoder object */
 237     p_sys->p_decoder = vlc_object_create( p_stream, VLC_OBJECT_DECODER );
 238     vlc_object_attach( p_sys->p_decoder, p_stream );
 239     p_sys->p_decoder->p_module = NULL;
 240     p_sys->p_decoder->fmt_in = *p_fmt;
 241     p_sys->p_decoder->b_pace_control = VLC_FALSE;
 242     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 243     p_sys->p_decoder->fmt_out.i_extra = 0;
 244     p_sys->p_decoder->fmt_out.p_extra = 0;
 245     p_sys->p_decoder->pf_decode_video = 0;
 246     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer;
 247     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer;
 248     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 249     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 250     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 251     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 252         p_sys->p_decoder->p_owner->pp_pics[i] = 0;
 253     p_sys->p_decoder->p_owner->video = p_fmt->video;
 254     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 255
 256     p_sys->p_decoder->p_module =
 257         module_Need( p_sys->p_decoder, "decoder", "$codec", 0 );
 258
 259     if( !p_sys->p_decoder->p_module )
 260     {
 261         msg_Err( p_stream, "cannot find decoder" );
 262         vlc_object_detach( p_sys->p_decoder );
 263         vlc_object_destroy( p_sys->p_decoder );
 264         return NULL;
 265     }
 266
 267     p_sys->b_inited = VLC_TRUE;
 268     vlc_mutex_lock( p_sys->p_lock );
 269
 270     p_bridge = GetBridge( p_stream );
 271     if ( p_bridge == NULL )
 272     {
 273         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 274         vlc_value_t val;
 275
 276         p_bridge = malloc( sizeof( bridge_t ) );
 277
 278         var_Create( p_libvlc_global, "mosaic-struct", VLC_VAR_ADDRESS );
 279         val.p_address = p_bridge;
 280         var_Set( p_libvlc_global, "mosaic-struct", val );
 281
 282         p_bridge->i_es_num = 0;
 283         p_bridge->pp_es = NULL;
 284     }
 285
 286     for ( i = 0; i < p_bridge->i_es_num; i++ )
 287     {
 288         if ( p_bridge->pp_es[i]->b_empty )
 289             break;
 290     }
 291
 292     if ( i == p_bridge->i_es_num )
 293     {
 294         p_bridge->pp_es = realloc( p_bridge->pp_es,
 295                                    (p_bridge->i_es_num + 1)
 296                                      * sizeof(bridged_es_t *) );
 297         p_bridge->i_es_num++;
 298         p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
 299     }
 300
 301     p_sys->p_es = p_es = p_bridge->pp_es[i];
 302
 303     //p_es->fmt = *p_fmt;
 304     p_es->psz_id = p_sys->psz_id;
 305     p_es->p_picture = NULL;
 306     p_es->pp_last = &p_es->p_picture;
 307     p_es->b_empty = VLC_FALSE;
 308
 309     vlc_mutex_unlock( p_sys->p_lock );
 310
 311     if ( p_sys->i_height || p_sys->i_width )
 312     {
 313         p_sys->p_image = image_HandlerCreate( p_stream );
 314     }
 315
 316     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 317
 318     return (sout_stream_id_t *)p_sys;
 319 }
 320
 321 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 322 {
 323     sout_stream_sys_t *p_sys = p_stream->p_sys;
 324     bridge_t *p_bridge;
 325     bridged_es_t *p_es;
 326     vlc_bool_t b_last_es = VLC_TRUE;
 327     int i;
 328
 329     if ( !p_sys->b_inited )
 330     {
 331         return VLC_SUCCESS;
 332     }
 333
 334     if ( p_sys->p_decoder != NULL )
 335     {
 336         picture_t **pp_ring = p_sys->p_decoder->p_owner->pp_pics;
 337
 338         if( p_sys->p_decoder->p_module )
 339             module_Unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 340         vlc_object_detach( p_sys->p_decoder );
 341         vlc_object_destroy( p_sys->p_decoder );
 342
 343         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 344         {
 345             if ( pp_ring[i] != NULL )
 346             {
 347                 if ( pp_ring[i]->p_data_orig != NULL )
 348                     free( pp_ring[i]->p_data_orig );
 349                 free( pp_ring[i]->p_sys );
 350                 free( pp_ring[i] );
 351             }
 352         }
 353     }
 354
 355     vlc_mutex_lock( p_sys->p_lock );
 356
 357     p_bridge = GetBridge( p_stream );
 358     p_es = p_sys->p_es;
 359
 360     p_es->b_empty = VLC_TRUE;
 361     while ( p_es->p_picture )
 362     {
 363         picture_t *p_next = p_es->p_picture->p_next;
 364         p_es->p_picture->pf_release( p_es->p_picture );
 365         p_es->p_picture = p_next;
 366     }
 367
 368     for ( i = 0; i < p_bridge->i_es_num; i++ )
 369     {
 370         if ( !p_bridge->pp_es[i]->b_empty )
 371         {
 372             b_last_es = VLC_FALSE;
 373             break;
 374         }
 375     }
 376
 377     if ( b_last_es )
 378     {
 379         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 380         for ( i = 0; i < p_bridge->i_es_num; i++ )
 381             free( p_bridge->pp_es[i] );
 382         free( p_bridge->pp_es );
 383         free( p_bridge );
 384         var_Destroy( p_libvlc_global, "mosaic-struct" );
 385     }
 386
 387     vlc_mutex_unlock( p_sys->p_lock );
 388
 389     if ( p_sys->i_height || p_sys->i_width )
 390     {
 391         image_HandlerDelete( p_sys->p_image );
 392     }
 393
 394     p_sys->b_inited = VLC_FALSE;
 395
 396     return VLC_SUCCESS;
 397 }
 398
 399 /*****************************************************************************
 400  * PushPicture : push a picture in the mosaic-struct structure
 401  *****************************************************************************/
 402 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 403 {
 404     sout_stream_sys_t *p_sys = p_stream->p_sys;
 405     bridged_es_t *p_es = p_sys->p_es;
 406
 407     vlc_mutex_lock( p_sys->p_lock );
 408
 409     *p_es->pp_last = p_picture;
 410     p_picture->p_next = NULL;
 411     p_es->pp_last = &p_picture->p_next;
 412
 413     vlc_mutex_unlock( p_sys->p_lock );
 414 }
 415
 416 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 417                  block_t *p_buffer )
 418 {
 419     sout_stream_sys_t *p_sys = p_stream->p_sys;
 420     picture_t *p_pic;
 421
 422     if ( (sout_stream_sys_t *)id != p_sys )
 423     {
 424         block_ChainRelease( p_buffer );
 425         return VLC_SUCCESS;
 426     }
 427
 428     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 429                                                         &p_buffer )) )
 430     {
 431         picture_t *p_new_pic;
 432
 433         if ( p_sys->i_height || p_sys->i_width )
 434         {
 435             video_format_t fmt_out, fmt_in;
 436
 437             memset( &fmt_in, 0, sizeof(video_format_t) );
 438             memset( &fmt_out, 0, sizeof(video_format_t) );
 439             fmt_in = p_sys->p_decoder->fmt_out.video;
 440
 441             fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 442
 443             if ( !p_sys->i_height )
 444             {
 445                 fmt_out.i_width = p_sys->i_width;
 446                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 447                     * p_sys->i_sar_num / p_sys->i_sar_den / fmt_in.i_aspect)
 448                       & ~0x1;
 449             }
 450             else if ( !p_sys->i_width )
 451             {
 452                 fmt_out.i_height = p_sys->i_height;
 453                 fmt_out.i_width = (p_sys->i_height * fmt_in.i_aspect
 454                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 455                       & ~0x1;
 456             }
 457             else
 458             {
 459                 fmt_out.i_width = p_sys->i_width;
 460                 fmt_out.i_height = p_sys->i_height;
 461             }
 462             fmt_out.i_visible_width = fmt_out.i_width;
 463             fmt_out.i_visible_height = fmt_out.i_height;
 464
 465             p_new_pic = image_Convert( p_sys->p_image,
 466                                        p_pic, &fmt_in, &fmt_out );
 467             if ( p_new_pic == NULL )
 468             {
 469                 msg_Err( p_stream, "image conversion failed" );
 470                 continue;
 471             }
 472         }
 473         else
 474         {
 475             p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
 476             vout_AllocatePicture( p_stream, p_new_pic, p_pic->format.i_chroma,
 477                                   p_pic->format.i_width, p_pic->format.i_height,
 478                                   p_sys->p_decoder->fmt_out.video.i_aspect );
 479
 480             vout_CopyPicture( p_stream, p_new_pic, p_pic );
 481         }
 482
 483         p_new_pic->i_refcount = 1;
 484         p_new_pic->i_status = DESTROYED_PICTURE;
 485         p_new_pic->i_type   = DIRECT_PICTURE;
 486         p_new_pic->p_sys = (picture_sys_t *)p_new_pic->pf_release;
 487         p_new_pic->pf_release = ReleasePicture;
 488         p_new_pic->date = p_pic->date;
 489
 490         p_pic->pf_release( p_pic );
 491         PushPicture( p_stream, p_new_pic );
 492     }
 493
 494     return VLC_SUCCESS;
 495 }
 496
 497 struct picture_sys_t
 498 {
 499     vlc_object_t *p_owner;
 500     vlc_bool_t b_dead;
 501 };
 502
 503 static void video_release_buffer( picture_t *p_pic )
 504 {
 505     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
 506     {
 507         video_del_buffer( (decoder_t *)p_pic->p_sys->p_owner, p_pic );
 508     }
 509     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
 510 }
 511
 512 static picture_t *video_new_buffer( decoder_t *p_dec )
 513 {
 514     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 515     picture_t **pp_ring = p_dec->p_owner->pp_pics;
 516     picture_t *p_pic;
 517     int i;
 518
 519     if( p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 520         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 521         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 522         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 523     {
 524         if( !p_dec->fmt_out.video.i_sar_num ||
 525             !p_dec->fmt_out.video.i_sar_den )
 526         {
 527             p_dec->fmt_out.video.i_sar_num =
 528               p_dec->fmt_out.video.i_aspect * p_dec->fmt_out.video.i_height;
 529
 530             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
 531               p_dec->fmt_out.video.i_width;
 532         }
 533
 534         vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
 535                      &p_dec->fmt_out.video.i_sar_den,
 536                      p_dec->fmt_out.video.i_sar_num,
 537                      p_dec->fmt_out.video.i_sar_den, 0 );
 538
 539         if( !p_dec->fmt_out.video.i_visible_width ||
 540             !p_dec->fmt_out.video.i_visible_height )
 541         {
 542             p_dec->fmt_out.video.i_visible_width =
 543                 p_dec->fmt_out.video.i_width;
 544             p_dec->fmt_out.video.i_visible_height =
 545                 p_dec->fmt_out.video.i_height;
 546         }
 547
 548         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 549         p_sys->video = p_dec->fmt_out.video;
 550
 551         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 552         {
 553             if ( pp_ring[i] != NULL )
 554             {
 555                 if ( pp_ring[i]->i_status == DESTROYED_PICTURE )
 556                 {
 557                     if ( pp_ring[i]->p_data_orig != NULL )
 558                         free( pp_ring[i]->p_data_orig );
 559                     free( pp_ring[i]->p_sys );
 560                     free( pp_ring[i] );
 561                 }
 562                 else
 563                 {
 564                     pp_ring[i]->p_sys->b_dead = VLC_TRUE;
 565                 }
 566                 pp_ring[i] = NULL;
 567             }
 568         }
 569     }
 570
 571     /* Find an empty space in the picture ring buffer */
 572     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 573     {
 574         if( pp_ring[i] != NULL && pp_ring[i]->i_status == DESTROYED_PICTURE )
 575         {
 576             pp_ring[i]->i_status = RESERVED_PICTURE;
 577             return pp_ring[i];
 578         }
 579     }
 580     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 581     {
 582         if( pp_ring[i] == NULL ) break;
 583     }
 584
 585     if( i == PICTURE_RING_SIZE )
 586     {
 587         msg_Err( p_dec, "decoder/filter is leaking pictures, "
 588                  "resetting its ring buffer" );
 589
 590         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 591         {
 592             pp_ring[i]->pf_release( pp_ring[i] );
 593         }
 594
 595         i = 0;
 596     }
 597
 598     p_pic = malloc( sizeof(picture_t) );
 599     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 600     vout_AllocatePicture( VLC_OBJECT(p_dec), p_pic,
 601                           p_dec->fmt_out.video.i_chroma,
 602                           p_dec->fmt_out.video.i_width,
 603                           p_dec->fmt_out.video.i_height,
 604                           p_dec->fmt_out.video.i_aspect );
 605
 606     if( !p_pic->i_planes )
 607     {
 608         free( p_pic );
 609         return NULL;
 610     }
 611
 612     p_pic->pf_release = video_release_buffer;
 613     p_pic->p_sys = malloc( sizeof(picture_sys_t) );
 614     p_pic->p_sys->p_owner = VLC_OBJECT(p_dec);
 615     p_pic->p_sys->b_dead = VLC_FALSE;
 616     p_pic->i_status = RESERVED_PICTURE;
 617
 618     pp_ring[i] = p_pic;
 619
 620     return p_pic;
 621 }
 622
 623 static void video_del_buffer( decoder_t *p_this, picture_t *p_pic )
 624 {
 625     p_pic->i_refcount = 0;
 626     p_pic->i_status = DESTROYED_PICTURE;
 627     if ( p_pic->p_sys->b_dead )
 628     {
 629         if ( p_pic->p_data_orig != NULL )
 630             free( p_pic->p_data_orig );
 631         free( p_pic->p_sys );
 632         free( p_pic );
 633     }
 634 }
 635
 636 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 637 {
 638     p_pic->i_refcount++;
 639 }
 640
 641 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 642 {
 643     video_release_buffer( p_pic );
 644 }
 645