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/decoder.h>
  35
  36 #include "vlc_image.h"
  37
  38 #include "../video_filter/mosaic.h"
  39
  40 /*****************************************************************************
  41  * Local structures
  42  *****************************************************************************/
  43 struct sout_stream_sys_t
  44 {
  45     bridged_es_t *p_es;
  46     vlc_mutex_t *p_lock;
  47
  48     decoder_t       *p_decoder;
  49     image_handler_t *p_image; /* filter for resizing */
  50     int i_height, i_width;
  51     int i_sar_num, i_sar_den;
  52     char *psz_id;
  53     vlc_bool_t b_inited;
  54 };
  55
  56 #define PICTURE_RING_SIZE 4
  57 struct decoder_owner_sys_t
  58 {
  59     picture_t *pp_pics[PICTURE_RING_SIZE];
  60
  61     /* Current format in use by the output */
  62     video_format_t video;
  63 };
  64
  65 typedef void (* pf_release_t)( picture_t * );
  66 static void ReleasePicture( picture_t *p_pic )
  67 {
  68     p_pic->i_refcount--;
  69
  70     if ( p_pic->i_refcount <= 0 )
  71     {
  72         if ( p_pic->p_sys != NULL )
  73         {
  74             pf_release_t pf_release = (pf_release_t)p_pic->p_sys;
  75             p_pic->p_sys = NULL;
  76             pf_release( p_pic );
  77         }
  78         else
  79         {
  80             if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
  81             if( p_pic ) free( p_pic );
  82         }
  83     }
  84 }
  85
  86 /*****************************************************************************
  87  * Local prototypes
  88  *****************************************************************************/
  89 static int  Open    ( vlc_object_t * );
  90 static void Close   ( vlc_object_t * );
  91 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
  92 static int               Del ( sout_stream_t *, sout_stream_id_t * );
  93 static int               Send( sout_stream_t *, sout_stream_id_t *, block_t * );
  94
  95 static void video_del_buffer( decoder_t *, picture_t * );
  96 static picture_t *video_new_buffer( decoder_t * );
  97 static void video_link_picture_decoder( decoder_t *, picture_t * );
  98 static void video_unlink_picture_decoder( decoder_t *, picture_t * );
  99
 100 /*****************************************************************************
 101  * Module descriptor
 102  *****************************************************************************/
 103 #define ID_TEXT N_("ID")
 104 #define ID_LONGTEXT N_( \
 105     "Specify an identifier string for this subpicture" )
 106
 107 #define WIDTH_TEXT N_("Video width")
 108 #define WIDTH_LONGTEXT N_( \
 109     "Output video width." )
 110 #define HEIGHT_TEXT N_("Video height")
 111 #define HEIGHT_LONGTEXT N_( \
 112     "Output video height." )
 113 #define RATIO_TEXT N_("Sample aspect ratio")
 114 #define RATIO_LONGTEXT N_( \
 115     "Sample aspect ratio of the destination (1:1, 3:4, 2:3)." )
 116
 117 #define SOUT_CFG_PREFIX "sout-mosaic-bridge-"
 118
 119 vlc_module_begin();
 120     set_shortname( _( "Mosaic bridge" ) );
 121     set_description(_("Mosaic bridge stream output") );
 122     set_capability( "sout stream", 0 );
 123     add_shortcut( "mosaic-bridge" );
 124
 125     add_string( SOUT_CFG_PREFIX "id", "Id", NULL, ID_TEXT, ID_LONGTEXT,
 126                 VLC_FALSE );
 127     add_integer( SOUT_CFG_PREFIX "width", 0, NULL, WIDTH_TEXT,
 128                  WIDTH_LONGTEXT, VLC_TRUE );
 129     add_integer( SOUT_CFG_PREFIX "height", 0, NULL, HEIGHT_TEXT,
 130                  HEIGHT_LONGTEXT, VLC_TRUE );
 131     add_string( SOUT_CFG_PREFIX "sar", "1:1", NULL, RATIO_TEXT,
 132                 RATIO_LONGTEXT, VLC_FALSE );
 133
 134     set_callbacks( Open, Close );
 135
 136     var_Create( p_module->p_libvlc_global, "mosaic-lock", VLC_VAR_MUTEX );
 137 vlc_module_end();
 138
 139 static const char *ppsz_sout_options[] = {
 140     "id", "width", "height", "sar", NULL
 141 };
 142
 143 /*****************************************************************************
 144  * Open
 145  *****************************************************************************/
 146 static int Open( vlc_object_t *p_this )
 147 {
 148     sout_stream_t     *p_stream = (sout_stream_t *)p_this;
 149     sout_stream_sys_t *p_sys;
 150     libvlc_global_data_t *p_libvlc_global = p_this->p_libvlc_global;
 151     vlc_value_t val;
 152
 153     sout_CfgParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
 154                    p_stream->p_cfg );
 155
 156     p_sys          = malloc( sizeof( sout_stream_sys_t ) );
 157     p_stream->p_sys = p_sys;
 158     p_sys->b_inited = VLC_FALSE;
 159
 160     var_Get( p_libvlc_global, "mosaic-lock", &val );
 161     p_sys->p_lock = val.p_address;
 162
 163     var_Get( p_stream, SOUT_CFG_PREFIX "id", &val );
 164     p_sys->psz_id = val.psz_string;
 165
 166     var_Get( p_stream, SOUT_CFG_PREFIX "height", &val );
 167     p_sys->i_height = val.i_int;
 168
 169     var_Get( p_stream, SOUT_CFG_PREFIX "width", &val );
 170     p_sys->i_width = val.i_int;
 171
 172     var_Get( p_stream, SOUT_CFG_PREFIX "sar", &val );
 173     if ( val.psz_string )
 174     {
 175         char *psz_parser = strchr( val.psz_string, ':' );
 176
 177         if( psz_parser )
 178         {
 179             *psz_parser++ = '\0';
 180             p_sys->i_sar_num = atoi( val.psz_string );
 181             p_sys->i_sar_den = atoi( psz_parser );
 182             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 183                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 184         }
 185         else
 186         {
 187             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 188             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 189         }
 190
 191         free( val.psz_string );
 192     }
 193     else
 194     {
 195         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 196     }
 197
 198     p_stream->pf_add    = Add;
 199     p_stream->pf_del    = Del;
 200     p_stream->pf_send   = Send;
 201
 202     p_stream->p_sout->i_out_pace_nocontrol++;
 203
 204     return VLC_SUCCESS;
 205 }
 206
 207 /*****************************************************************************
 208  * Close
 209  *****************************************************************************/
 210 static void Close( vlc_object_t * p_this )
 211 {
 212     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 213     sout_stream_sys_t *p_sys = p_stream->p_sys;
 214
 215     p_stream->p_sout->i_out_pace_nocontrol--;
 216
 217     if ( p_sys->psz_id )
 218         free( p_sys->psz_id );
 219
 220     free( p_sys );
 221 }
 222
 223 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 224 {
 225     sout_stream_sys_t *p_sys = p_stream->p_sys;
 226     bridge_t *p_bridge;
 227     bridged_es_t *p_es;
 228     int i;
 229
 230     if ( p_sys->b_inited )
 231     {
 232         return NULL;
 233     }
 234
 235     /* Create decoder object */
 236     p_sys->p_decoder = vlc_object_create( p_stream, VLC_OBJECT_DECODER );
 237     vlc_object_attach( p_sys->p_decoder, p_stream );
 238     p_sys->p_decoder->p_module = NULL;
 239     p_sys->p_decoder->fmt_in = *p_fmt;
 240     p_sys->p_decoder->b_pace_control = VLC_FALSE;
 241     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 242     p_sys->p_decoder->fmt_out.i_extra = 0;
 243     p_sys->p_decoder->fmt_out.p_extra = 0;
 244     p_sys->p_decoder->pf_decode_video = 0;
 245     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer;
 246     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer;
 247     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 248     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 249     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 250     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 251         p_sys->p_decoder->p_owner->pp_pics[i] = 0;
 252     p_sys->p_decoder->p_owner->video = p_fmt->video;
 253     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 254
 255     p_sys->p_decoder->p_module =
 256         module_Need( p_sys->p_decoder, "decoder", "$codec", 0 );
 257
 258     if( !p_sys->p_decoder->p_module )
 259     {
 260         msg_Err( p_stream, "cannot find decoder" );
 261         vlc_object_detach( p_sys->p_decoder );
 262         vlc_object_destroy( p_sys->p_decoder );
 263         return NULL;
 264     }
 265
 266     p_sys->b_inited = VLC_TRUE;
 267     vlc_mutex_lock( p_sys->p_lock );
 268
 269     p_bridge = GetBridge( p_stream );
 270     if ( p_bridge == NULL )
 271     {
 272         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 273         vlc_value_t val;
 274
 275         p_bridge = malloc( sizeof( bridge_t ) );
 276
 277         var_Create( p_libvlc_global, "mosaic-struct", VLC_VAR_ADDRESS );
 278         val.p_address = p_bridge;
 279         var_Set( p_libvlc_global, "mosaic-struct", val );
 280
 281         p_bridge->i_es_num = 0;
 282         p_bridge->pp_es = NULL;
 283     }
 284
 285     for ( i = 0; i < p_bridge->i_es_num; i++ )
 286     {
 287         if ( p_bridge->pp_es[i]->b_empty )
 288             break;
 289     }
 290
 291     if ( i == p_bridge->i_es_num )
 292     {
 293         p_bridge->pp_es = realloc( p_bridge->pp_es,
 294                                    (p_bridge->i_es_num + 1)
 295                                      * sizeof(bridged_es_t *) );
 296         p_bridge->i_es_num++;
 297         p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
 298     }
 299
 300     p_sys->p_es = p_es = p_bridge->pp_es[i];
 301
 302     //p_es->fmt = *p_fmt;
 303     p_es->psz_id = p_sys->psz_id;
 304     p_es->p_picture = NULL;
 305     p_es->pp_last = &p_es->p_picture;
 306     p_es->b_empty = VLC_FALSE;
 307
 308     vlc_mutex_unlock( p_sys->p_lock );
 309
 310     if ( p_sys->i_height || p_sys->i_width )
 311     {
 312         p_sys->p_image = image_HandlerCreate( p_stream );
 313     }
 314
 315     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 316
 317     return (sout_stream_id_t *)p_sys;
 318 }
 319
 320 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 321 {
 322     sout_stream_sys_t *p_sys = p_stream->p_sys;
 323     bridge_t *p_bridge;
 324     bridged_es_t *p_es;
 325     vlc_bool_t b_last_es = VLC_TRUE;
 326     int i;
 327
 328     if ( !p_sys->b_inited )
 329     {
 330         return VLC_SUCCESS;
 331     }
 332
 333     if ( p_sys->p_decoder != NULL )
 334     {
 335         picture_t **pp_ring = p_sys->p_decoder->p_owner->pp_pics;
 336
 337         if( p_sys->p_decoder->p_module )
 338             module_Unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 339         vlc_object_detach( p_sys->p_decoder );
 340         vlc_object_destroy( p_sys->p_decoder );
 341
 342         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 343         {
 344             if ( pp_ring[i] != NULL )
 345             {
 346                 if ( pp_ring[i]->p_data_orig != NULL )
 347                     free( pp_ring[i]->p_data_orig );
 348                 free( pp_ring[i]->p_sys );
 349                 free( pp_ring[i] );
 350             }
 351         }
 352     }
 353
 354     vlc_mutex_lock( p_sys->p_lock );
 355
 356     p_bridge = GetBridge( p_stream );
 357     p_es = p_sys->p_es;
 358
 359     p_es->b_empty = VLC_TRUE;
 360     while ( p_es->p_picture )
 361     {
 362         picture_t *p_next = p_es->p_picture->p_next;
 363         p_es->p_picture->pf_release( p_es->p_picture );
 364         p_es->p_picture = p_next;
 365     }
 366
 367     for ( i = 0; i < p_bridge->i_es_num; i++ )
 368     {
 369         if ( !p_bridge->pp_es[i]->b_empty )
 370         {
 371             b_last_es = VLC_FALSE;
 372             break;
 373         }
 374     }
 375
 376     if ( b_last_es )
 377     {
 378         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 379         for ( i = 0; i < p_bridge->i_es_num; i++ )
 380             free( p_bridge->pp_es[i] );
 381         free( p_bridge->pp_es );
 382         free( p_bridge );
 383         var_Destroy( p_libvlc_global, "mosaic-struct" );
 384     }
 385
 386     vlc_mutex_unlock( p_sys->p_lock );
 387
 388     if ( p_sys->i_height || p_sys->i_width )
 389     {
 390         image_HandlerDelete( p_sys->p_image );
 391     }
 392
 393     p_sys->b_inited = VLC_FALSE;
 394
 395     return VLC_SUCCESS;
 396 }
 397
 398 /*****************************************************************************
 399  * PushPicture : push a picture in the mosaic-struct structure
 400  *****************************************************************************/
 401 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 402 {
 403     sout_stream_sys_t *p_sys = p_stream->p_sys;
 404     bridged_es_t *p_es = p_sys->p_es;
 405
 406     vlc_mutex_lock( p_sys->p_lock );
 407
 408     *p_es->pp_last = p_picture;
 409     p_picture->p_next = NULL;
 410     p_es->pp_last = &p_picture->p_next;
 411
 412     vlc_mutex_unlock( p_sys->p_lock );
 413 }
 414
 415 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 416                  block_t *p_buffer )
 417 {
 418     sout_stream_sys_t *p_sys = p_stream->p_sys;
 419     picture_t *p_pic;
 420
 421     if ( (sout_stream_sys_t *)id != p_sys )
 422     {
 423         block_ChainRelease( p_buffer );
 424         return VLC_SUCCESS;
 425     }
 426
 427     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 428                                                         &p_buffer )) )
 429     {
 430         picture_t *p_new_pic;
 431
 432         if ( p_sys->i_height || p_sys->i_width )
 433         {
 434             video_format_t fmt_out, fmt_in;
 435
 436             memset( &fmt_in, 0, sizeof(video_format_t) );
 437             memset( &fmt_out, 0, sizeof(video_format_t) );
 438             fmt_in = p_sys->p_decoder->fmt_out.video;
 439
 440             fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 441
 442             if ( !p_sys->i_height )
 443             {
 444                 fmt_out.i_width = p_sys->i_width;
 445                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 446                     * p_sys->i_sar_num / p_sys->i_sar_den / fmt_in.i_aspect)
 447                       & ~0x1;
 448             }
 449             else if ( !p_sys->i_width )
 450             {
 451                 fmt_out.i_height = p_sys->i_height;
 452                 fmt_out.i_width = (p_sys->i_height * fmt_in.i_aspect
 453                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 454                       & ~0x1;
 455             }
 456             else
 457             {
 458                 fmt_out.i_width = p_sys->i_width;
 459                 fmt_out.i_height = p_sys->i_height;
 460             }
 461             fmt_out.i_visible_width = fmt_out.i_width;
 462             fmt_out.i_visible_height = fmt_out.i_height;
 463
 464             p_new_pic = image_Convert( p_sys->p_image,
 465                                        p_pic, &fmt_in, &fmt_out );
 466             if ( p_new_pic == NULL )
 467             {
 468                 msg_Err( p_stream, "image conversion failed" );
 469                 continue;
 470             }
 471         }
 472         else
 473         {
 474             p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
 475             vout_AllocatePicture( p_stream, p_new_pic, p_pic->format.i_chroma,
 476                                   p_pic->format.i_width, p_pic->format.i_height,
 477                                   p_sys->p_decoder->fmt_out.video.i_aspect );
 478
 479             vout_CopyPicture( p_stream, p_new_pic, p_pic );
 480         }
 481
 482         p_new_pic->i_refcount = 1;
 483         p_new_pic->i_status = DESTROYED_PICTURE;
 484         p_new_pic->i_type   = DIRECT_PICTURE;
 485         p_new_pic->p_sys = (picture_sys_t *)p_new_pic->pf_release;
 486         p_new_pic->pf_release = ReleasePicture;
 487         p_new_pic->date = p_pic->date;
 488
 489         p_pic->pf_release( p_pic );
 490         PushPicture( p_stream, p_new_pic );
 491     }
 492
 493     return VLC_SUCCESS;
 494 }
 495
 496 struct picture_sys_t
 497 {
 498     vlc_object_t *p_owner;
 499     vlc_bool_t b_dead;
 500 };
 501
 502 static void video_release_buffer( picture_t *p_pic )
 503 {
 504     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
 505     {
 506         video_del_buffer( (decoder_t *)p_pic->p_sys->p_owner, p_pic );
 507     }
 508     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
 509 }
 510
 511 static picture_t *video_new_buffer( decoder_t *p_dec )
 512 {
 513     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 514     picture_t **pp_ring = p_dec->p_owner->pp_pics;
 515     picture_t *p_pic;
 516     int i;
 517
 518     if( p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 519         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 520         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 521         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 522     {
 523         if( !p_dec->fmt_out.video.i_sar_num ||
 524             !p_dec->fmt_out.video.i_sar_den )
 525         {
 526             p_dec->fmt_out.video.i_sar_num =
 527               p_dec->fmt_out.video.i_aspect * p_dec->fmt_out.video.i_height;
 528
 529             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
 530               p_dec->fmt_out.video.i_width;
 531         }
 532
 533         vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
 534                      &p_dec->fmt_out.video.i_sar_den,
 535                      p_dec->fmt_out.video.i_sar_num,
 536                      p_dec->fmt_out.video.i_sar_den, 0 );
 537
 538         if( !p_dec->fmt_out.video.i_visible_width ||
 539             !p_dec->fmt_out.video.i_visible_height )
 540         {
 541             p_dec->fmt_out.video.i_visible_width =
 542                 p_dec->fmt_out.video.i_width;
 543             p_dec->fmt_out.video.i_visible_height =
 544                 p_dec->fmt_out.video.i_height;
 545         }
 546
 547         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 548         p_sys->video = p_dec->fmt_out.video;
 549
 550         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 551         {
 552             if ( pp_ring[i] != NULL )
 553             {
 554                 if ( pp_ring[i]->i_status == DESTROYED_PICTURE )
 555                 {
 556                     if ( pp_ring[i]->p_data_orig != NULL )
 557                         free( pp_ring[i]->p_data_orig );
 558                     free( pp_ring[i]->p_sys );
 559                     free( pp_ring[i] );
 560                 }
 561                 else
 562                 {
 563                     pp_ring[i]->p_sys->b_dead = VLC_TRUE;
 564                 }
 565                 pp_ring[i] = NULL;
 566             }
 567         }
 568     }
 569
 570     /* Find an empty space in the picture ring buffer */
 571     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 572     {
 573         if( pp_ring[i] != NULL && pp_ring[i]->i_status == DESTROYED_PICTURE )
 574         {
 575             pp_ring[i]->i_status = RESERVED_PICTURE;
 576             return pp_ring[i];
 577         }
 578     }
 579     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 580     {
 581         if( pp_ring[i] == NULL ) break;
 582     }
 583
 584     if( i == PICTURE_RING_SIZE )
 585     {
 586         msg_Err( p_dec, "decoder/filter is leaking pictures, "
 587                  "resetting its ring buffer" );
 588
 589         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 590         {
 591             pp_ring[i]->pf_release( pp_ring[i] );
 592         }
 593
 594         i = 0;
 595     }
 596
 597     p_pic = malloc( sizeof(picture_t) );
 598     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 599     vout_AllocatePicture( VLC_OBJECT(p_dec), p_pic,
 600                           p_dec->fmt_out.video.i_chroma,
 601                           p_dec->fmt_out.video.i_width,
 602                           p_dec->fmt_out.video.i_height,
 603                           p_dec->fmt_out.video.i_aspect );
 604
 605     if( !p_pic->i_planes )
 606     {
 607         free( p_pic );
 608         return NULL;
 609     }
 610
 611     p_pic->pf_release = video_release_buffer;
 612     p_pic->p_sys = malloc( sizeof(picture_sys_t) );
 613     p_pic->p_sys->p_owner = VLC_OBJECT(p_dec);
 614     p_pic->p_sys->b_dead = VLC_FALSE;
 615     p_pic->i_status = RESERVED_PICTURE;
 616
 617     pp_ring[i] = p_pic;
 618
 619     return p_pic;
 620 }
 621
 622 static void video_del_buffer( decoder_t *p_this, picture_t *p_pic )
 623 {
 624     p_pic->i_refcount = 0;
 625     p_pic->i_status = DESTROYED_PICTURE;
 626     if ( p_pic->p_sys->b_dead )
 627     {
 628         if ( p_pic->p_data_orig != NULL )
 629             free( p_pic->p_data_orig );
 630         free( p_pic->p_sys );
 631         free( p_pic );
 632     }
 633 }
 634
 635 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 636 {
 637     p_pic->i_refcount++;
 638 }
 639
 640 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 641 {
 642     video_release_buffer( p_pic );
 643 }
 644