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     if( p_stream->p_sys->p_mask )
 258         p_stream->p_sys->p_mask->pf_release( p_stream->p_sys->p_mask );
 259
 260     free( p_sys );
 261 }
 262
 263 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 264 {
 265     sout_stream_sys_t *p_sys = p_stream->p_sys;
 266     bridge_t *p_bridge;
 267     bridged_es_t *p_es;
 268     int i;
 269
 270     if ( p_sys->b_inited )
 271     {
 272         return NULL;
 273     }
 274
 275     /* Create decoder object */
 276     p_sys->p_decoder = vlc_object_create( p_stream, VLC_OBJECT_DECODER );
 277     vlc_object_attach( p_sys->p_decoder, p_stream );
 278     p_sys->p_decoder->p_module = NULL;
 279     p_sys->p_decoder->fmt_in = *p_fmt;
 280     p_sys->p_decoder->b_pace_control = VLC_FALSE;
 281     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 282     p_sys->p_decoder->fmt_out.i_extra = 0;
 283     p_sys->p_decoder->fmt_out.p_extra = 0;
 284     p_sys->p_decoder->pf_decode_video = 0;
 285     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer;
 286     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer;
 287     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 288     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 289     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 290     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 291         p_sys->p_decoder->p_owner->pp_pics[i] = 0;
 292     p_sys->p_decoder->p_owner->video = p_fmt->video;
 293     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 294
 295     p_sys->p_decoder->p_module =
 296         module_Need( p_sys->p_decoder, "decoder", "$codec", 0 );
 297
 298     if( !p_sys->p_decoder->p_module )
 299     {
 300         msg_Err( p_stream, "cannot find decoder" );
 301         vlc_object_detach( p_sys->p_decoder );
 302         vlc_object_destroy( p_sys->p_decoder );
 303         return NULL;
 304     }
 305
 306     p_sys->b_inited = VLC_TRUE;
 307     vlc_mutex_lock( p_sys->p_lock );
 308
 309     p_bridge = GetBridge( p_stream );
 310     if ( p_bridge == NULL )
 311     {
 312         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 313         vlc_value_t val;
 314
 315         p_bridge = malloc( sizeof( bridge_t ) );
 316
 317         var_Create( p_libvlc_global, "mosaic-struct", VLC_VAR_ADDRESS );
 318         val.p_address = p_bridge;
 319         var_Set( p_libvlc_global, "mosaic-struct", val );
 320
 321         p_bridge->i_es_num = 0;
 322         p_bridge->pp_es = NULL;
 323     }
 324
 325     for ( i = 0; i < p_bridge->i_es_num; i++ )
 326     {
 327         if ( p_bridge->pp_es[i]->b_empty )
 328             break;
 329     }
 330
 331     if ( i == p_bridge->i_es_num )
 332     {
 333         p_bridge->pp_es = realloc( p_bridge->pp_es,
 334                                    (p_bridge->i_es_num + 1)
 335                                      * sizeof(bridged_es_t *) );
 336         p_bridge->i_es_num++;
 337         p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
 338     }
 339
 340     p_sys->p_es = p_es = p_bridge->pp_es[i];
 341
 342     //p_es->fmt = *p_fmt;
 343     p_es->psz_id = p_sys->psz_id;
 344     p_es->p_picture = NULL;
 345     p_es->pp_last = &p_es->p_picture;
 346     p_es->b_empty = VLC_FALSE;
 347
 348     vlc_mutex_unlock( p_sys->p_lock );
 349
 350     if ( p_sys->i_height || p_sys->i_width )
 351     {
 352         p_sys->p_image = image_HandlerCreate( p_stream );
 353     }
 354
 355     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 356
 357     return (sout_stream_id_t *)p_sys;
 358 }
 359
 360 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 361 {
 362     sout_stream_sys_t *p_sys = p_stream->p_sys;
 363     bridge_t *p_bridge;
 364     bridged_es_t *p_es;
 365     vlc_bool_t b_last_es = VLC_TRUE;
 366     int i;
 367
 368     if ( !p_sys->b_inited )
 369     {
 370         return VLC_SUCCESS;
 371     }
 372
 373     if ( p_sys->p_decoder != NULL )
 374     {
 375         picture_t **pp_ring = p_sys->p_decoder->p_owner->pp_pics;
 376
 377         if( p_sys->p_decoder->p_module )
 378             module_Unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 379         vlc_object_detach( p_sys->p_decoder );
 380         vlc_object_destroy( p_sys->p_decoder );
 381
 382         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 383         {
 384             if ( pp_ring[i] != NULL )
 385             {
 386                 if ( pp_ring[i]->p_data_orig != NULL )
 387                     free( pp_ring[i]->p_data_orig );
 388                 free( pp_ring[i]->p_sys );
 389                 free( pp_ring[i] );
 390             }
 391         }
 392     }
 393
 394     vlc_mutex_lock( p_sys->p_lock );
 395
 396     p_bridge = GetBridge( p_stream );
 397     p_es = p_sys->p_es;
 398
 399     p_es->b_empty = VLC_TRUE;
 400     while ( p_es->p_picture )
 401     {
 402         picture_t *p_next = p_es->p_picture->p_next;
 403         p_es->p_picture->pf_release( p_es->p_picture );
 404         p_es->p_picture = p_next;
 405     }
 406
 407     for ( i = 0; i < p_bridge->i_es_num; i++ )
 408     {
 409         if ( !p_bridge->pp_es[i]->b_empty )
 410         {
 411             b_last_es = VLC_FALSE;
 412             break;
 413         }
 414     }
 415
 416     if ( b_last_es )
 417     {
 418         libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
 419         for ( i = 0; i < p_bridge->i_es_num; i++ )
 420             free( p_bridge->pp_es[i] );
 421         free( p_bridge->pp_es );
 422         free( p_bridge );
 423         var_Destroy( p_libvlc_global, "mosaic-struct" );
 424     }
 425
 426     vlc_mutex_unlock( p_sys->p_lock );
 427
 428     if ( p_sys->i_height || p_sys->i_width )
 429     {
 430         image_HandlerDelete( p_sys->p_image );
 431     }
 432
 433     p_sys->b_inited = VLC_FALSE;
 434
 435     return VLC_SUCCESS;
 436 }
 437
 438 /*****************************************************************************
 439  * PushPicture : push a picture in the mosaic-struct structure
 440  *****************************************************************************/
 441 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 442 {
 443     sout_stream_sys_t *p_sys = p_stream->p_sys;
 444     bridged_es_t *p_es = p_sys->p_es;
 445
 446     vlc_mutex_lock( p_sys->p_lock );
 447
 448     *p_es->pp_last = p_picture;
 449     p_picture->p_next = NULL;
 450     p_es->pp_last = &p_picture->p_next;
 451
 452     vlc_mutex_unlock( p_sys->p_lock );
 453 }
 454
 455 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 456                  block_t *p_buffer )
 457 {
 458     sout_stream_sys_t *p_sys = p_stream->p_sys;
 459     picture_t *p_pic;
 460
 461     if ( (sout_stream_sys_t *)id != p_sys )
 462     {
 463         block_ChainRelease( p_buffer );
 464         return VLC_SUCCESS;
 465     }
 466
 467     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 468                                                         &p_buffer )) )
 469     {
 470         picture_t *p_new_pic;
 471
 472         if( p_sys->i_height || p_sys->i_width )
 473         {
 474             video_format_t fmt_out, fmt_in;
 475
 476             memset( &fmt_in, 0, sizeof(video_format_t) );
 477             memset( &fmt_out, 0, sizeof(video_format_t) );
 478             fmt_in = p_sys->p_decoder->fmt_out.video;
 479
 480             if( p_sys->p_mask )
 481                 fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 482             else
 483                 fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
 484
 485             if ( !p_sys->i_height )
 486             {
 487                 fmt_out.i_width = p_sys->i_width;
 488                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 489                     * p_sys->i_sar_num / p_sys->i_sar_den / fmt_in.i_aspect)
 490                       & ~0x1;
 491             }
 492             else if ( !p_sys->i_width )
 493             {
 494                 fmt_out.i_height = p_sys->i_height;
 495                 fmt_out.i_width = (p_sys->i_height * fmt_in.i_aspect
 496                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 497                       & ~0x1;
 498             }
 499             else
 500             {
 501                 fmt_out.i_width = p_sys->i_width;
 502                 fmt_out.i_height = p_sys->i_height;
 503             }
 504             fmt_out.i_visible_width = fmt_out.i_width;
 505             fmt_out.i_visible_height = fmt_out.i_height;
 506
 507             p_new_pic = image_Convert( p_sys->p_image,
 508                                        p_pic, &fmt_in, &fmt_out );
 509             if ( p_new_pic == NULL )
 510             {
 511                 msg_Err( p_stream, "image conversion failed" );
 512                 continue;
 513             }
 514
 515             if( p_sys->p_mask )
 516             {
 517                 plane_t *p_mask = p_sys->p_mask->p+A_PLANE;
 518                 plane_t *p_apic = p_new_pic->p+A_PLANE;
 519                 if(    p_mask->i_visible_pitch
 520                     != p_apic->i_visible_pitch
 521                     || p_mask->i_visible_lines
 522                     != p_apic->i_visible_lines )
 523                 {
 524                     msg_Warn( p_stream,
 525                               "Mask size (%d x %d) and image size (%d x %d) "
 526                               "don't match. The mask will not be applied.",
 527                               p_mask->i_visible_pitch,
 528                               p_mask->i_visible_lines,
 529                               p_apic->i_visible_pitch,
 530                               p_apic->i_visible_lines );
 531                 }
 532                 else
 533                 {
 534                     if( p_mask->i_pitch != p_apic->i_pitch
 535                     ||  p_mask->i_lines != p_apic->i_lines )
 536                     {
 537                         /* visible plane sizes match ... but not the undelying
 538                          * buffer. I'm not sure that this can happen,
 539                          * but better safe than sorry. */
 540                         int i_line;
 541                         int i_lines = p_mask->i_visible_lines;
 542                         uint8_t *p_src = p_mask->p_pixels;
 543                         uint8_t *p_dst = p_apic->p_pixels;
 544                         int i_src_pitch = p_mask->i_pitch;
 545                         int i_dst_pitch = p_apic->i_pitch;
 546                         int i_visible_pitch = p_mask->i_visible_pitch;
 547                         for( i_line = 0; i_line < i_lines; i_line++,
 548                              p_src += i_src_pitch, p_dst += i_dst_pitch )
 549                         {
 550                             p_stream->p_libvlc->pf_memcpy(
 551                                 p_dst, p_src, i_visible_pitch );
 552                         }
 553                     }
 554                     else
 555                     {
 556                         /* plane sizes match */
 557                         p_stream->p_libvlc->pf_memcpy(
 558                             p_apic->p_pixels, p_mask->p_pixels,
 559                             p_mask->i_pitch * p_mask->i_lines );
 560                     }
 561                 }
 562             }
 563         }
 564         else
 565         {
 566             p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
 567             vout_AllocatePicture( p_stream, p_new_pic, p_pic->format.i_chroma,
 568                                   p_pic->format.i_width, p_pic->format.i_height,
 569                                   p_sys->p_decoder->fmt_out.video.i_aspect );
 570
 571             vout_CopyPicture( p_stream, p_new_pic, p_pic );
 572         }
 573
 574         p_new_pic->i_refcount = 1;
 575         p_new_pic->i_status = DESTROYED_PICTURE;
 576         p_new_pic->i_type   = DIRECT_PICTURE;
 577         p_new_pic->p_sys = (picture_sys_t *)p_new_pic->pf_release;
 578         p_new_pic->pf_release = ReleasePicture;
 579         p_new_pic->date = p_pic->date;
 580
 581         p_pic->pf_release( p_pic );
 582         PushPicture( p_stream, p_new_pic );
 583     }
 584
 585     return VLC_SUCCESS;
 586 }
 587
 588 struct picture_sys_t
 589 {
 590     vlc_object_t *p_owner;
 591     vlc_bool_t b_dead;
 592 };
 593
 594 static void video_release_buffer( picture_t *p_pic )
 595 {
 596     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
 597     {
 598         video_del_buffer( (decoder_t *)p_pic->p_sys->p_owner, p_pic );
 599     }
 600     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
 601 }
 602
 603 static picture_t *video_new_buffer( decoder_t *p_dec )
 604 {
 605     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 606     picture_t **pp_ring = p_dec->p_owner->pp_pics;
 607     picture_t *p_pic;
 608     int i;
 609
 610     if( p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 611         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 612         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 613         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 614     {
 615         if( !p_dec->fmt_out.video.i_sar_num ||
 616             !p_dec->fmt_out.video.i_sar_den )
 617         {
 618             p_dec->fmt_out.video.i_sar_num =
 619               p_dec->fmt_out.video.i_aspect * p_dec->fmt_out.video.i_height;
 620
 621             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
 622               p_dec->fmt_out.video.i_width;
 623         }
 624
 625         vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
 626                      &p_dec->fmt_out.video.i_sar_den,
 627                      p_dec->fmt_out.video.i_sar_num,
 628                      p_dec->fmt_out.video.i_sar_den, 0 );
 629
 630         if( !p_dec->fmt_out.video.i_visible_width ||
 631             !p_dec->fmt_out.video.i_visible_height )
 632         {
 633             p_dec->fmt_out.video.i_visible_width =
 634                 p_dec->fmt_out.video.i_width;
 635             p_dec->fmt_out.video.i_visible_height =
 636                 p_dec->fmt_out.video.i_height;
 637         }
 638
 639         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 640         p_sys->video = p_dec->fmt_out.video;
 641
 642         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 643         {
 644             if ( pp_ring[i] != NULL )
 645             {
 646                 if ( pp_ring[i]->i_status == DESTROYED_PICTURE )
 647                 {
 648                     if ( pp_ring[i]->p_data_orig != NULL )
 649                         free( pp_ring[i]->p_data_orig );
 650                     free( pp_ring[i]->p_sys );
 651                     free( pp_ring[i] );
 652                 }
 653                 else
 654                 {
 655                     pp_ring[i]->p_sys->b_dead = VLC_TRUE;
 656                 }
 657                 pp_ring[i] = NULL;
 658             }
 659         }
 660     }
 661
 662     /* Find an empty space in the picture ring buffer */
 663     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 664     {
 665         if( pp_ring[i] != NULL && pp_ring[i]->i_status == DESTROYED_PICTURE )
 666         {
 667             pp_ring[i]->i_status = RESERVED_PICTURE;
 668             return pp_ring[i];
 669         }
 670     }
 671     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 672     {
 673         if( pp_ring[i] == NULL ) break;
 674     }
 675
 676     if( i == PICTURE_RING_SIZE )
 677     {
 678         msg_Err( p_dec, "decoder/filter is leaking pictures, "
 679                  "resetting its ring buffer" );
 680
 681         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 682         {
 683             pp_ring[i]->pf_release( pp_ring[i] );
 684         }
 685
 686         i = 0;
 687     }
 688
 689     p_pic = malloc( sizeof(picture_t) );
 690     p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 691     vout_AllocatePicture( VLC_OBJECT(p_dec), p_pic,
 692                           p_dec->fmt_out.video.i_chroma,
 693                           p_dec->fmt_out.video.i_width,
 694                           p_dec->fmt_out.video.i_height,
 695                           p_dec->fmt_out.video.i_aspect );
 696
 697     if( !p_pic->i_planes )
 698     {
 699         free( p_pic );
 700         return NULL;
 701     }
 702
 703     p_pic->pf_release = video_release_buffer;
 704     p_pic->p_sys = malloc( sizeof(picture_sys_t) );
 705     p_pic->p_sys->p_owner = VLC_OBJECT(p_dec);
 706     p_pic->p_sys->b_dead = VLC_FALSE;
 707     p_pic->i_status = RESERVED_PICTURE;
 708
 709     pp_ring[i] = p_pic;
 710
 711     return p_pic;
 712 }
 713
 714 static void video_del_buffer( decoder_t *p_this, picture_t *p_pic )
 715 {
 716     p_pic->i_refcount = 0;
 717     p_pic->i_status = DESTROYED_PICTURE;
 718     if ( p_pic->p_sys->b_dead )
 719     {
 720         if ( p_pic->p_data_orig != NULL )
 721             free( p_pic->p_data_orig );
 722         free( p_pic->p_sys );
 723         free( p_pic );
 724     }
 725 }
 726
 727 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 728 {
 729     p_pic->i_refcount++;
 730 }
 731
 732 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 733 {
 734     video_release_buffer( p_pic );
 735 }
 736