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

   1 /*****************************************************************************
   2  * mosaic_bridge.c:
   3  *****************************************************************************
   4  * Copyright (C) 2004-2007 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 #include <vlc_filter.h>
  39
  40 #include "../video_filter/mosaic.h"
  41
  42 /*****************************************************************************
  43  * Local structures
  44  *****************************************************************************/
  45 struct sout_stream_sys_t
  46 {
  47     bridged_es_t *p_es;
  48     vlc_mutex_t *p_lock;
  49
  50     decoder_t       *p_decoder;
  51     image_handler_t *p_image; /* filter for resizing */
  52     int i_height, i_width;
  53     unsigned int i_sar_num, i_sar_den;
  54     char *psz_id;
  55     vlc_bool_t b_inited;
  56
  57     int i_chroma; /* force image format chroma */
  58
  59     filter_t **pp_vfilters;
  60     int i_vfilters;
  61 };
  62
  63 #define PICTURE_RING_SIZE 4
  64 struct decoder_owner_sys_t
  65 {
  66     picture_t *pp_pics[PICTURE_RING_SIZE];
  67
  68     /* Current format in use by the output */
  69     video_format_t video;
  70 };
  71
  72 typedef void (* pf_release_t)( picture_t * );
  73 static void ReleasePicture( picture_t *p_pic )
  74 {
  75     p_pic->i_refcount--;
  76
  77     if ( p_pic->i_refcount <= 0 )
  78     {
  79         if ( p_pic->p_sys != NULL )
  80         {
  81             pf_release_t pf_release = (pf_release_t)p_pic->p_sys;
  82             p_pic->p_sys = NULL;
  83             pf_release( p_pic );
  84         }
  85         else
  86         {
  87             if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
  88             if( p_pic ) free( p_pic );
  89         }
  90     }
  91 }
  92
  93 /*****************************************************************************
  94  * Local prototypes
  95  *****************************************************************************/
  96 static int  Open    ( vlc_object_t * );
  97 static void Close   ( vlc_object_t * );
  98 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
  99 static int               Del ( sout_stream_t *, sout_stream_id_t * );
 100 static int               Send( sout_stream_t *, sout_stream_id_t *, block_t * );
 101
 102 inline static void video_del_buffer_decoder( decoder_t *, picture_t * );
 103 inline static void video_del_buffer_filter( filter_t *, picture_t * );
 104 static void video_del_buffer( vlc_object_t *, picture_t * );
 105
 106 inline static picture_t *video_new_buffer_decoder( decoder_t * );
 107 inline static picture_t *video_new_buffer_filter( filter_t * );
 108 static picture_t *video_new_buffer( vlc_object_t *, decoder_owner_sys_t *,
 109                                     es_format_t *, void (*)( picture_t * ) );
 110
 111 static void video_link_picture_decoder( decoder_t *, picture_t * );
 112 static void video_unlink_picture_decoder( decoder_t *, picture_t * );
 113 static int MosaicBridgeCallback( vlc_object_t *, char const *,
 114                                  vlc_value_t, vlc_value_t, void * );
 115
 116 /*****************************************************************************
 117  * Module descriptor
 118  *****************************************************************************/
 119 #define ID_TEXT N_("ID")
 120 #define ID_LONGTEXT N_( \
 121     "Specify an identifier string for this subpicture" )
 122
 123 #define WIDTH_TEXT N_("Video width")
 124 #define WIDTH_LONGTEXT N_( \
 125     "Output video width." )
 126 #define HEIGHT_TEXT N_("Video height")
 127 #define HEIGHT_LONGTEXT N_( \
 128     "Output video height." )
 129 #define RATIO_TEXT N_("Sample aspect ratio")
 130 #define RATIO_LONGTEXT N_( \
 131     "Sample aspect ratio of the destination (1:1, 3:4, 2:3)." )
 132
 133 #define VFILTER_TEXT N_("Video filter")
 134 #define VFILTER_LONGTEXT N_( \
 135     "Video filters will be applied to the video stream." );
 136
 137 #define CHROMA_TEXT N_("Image chroma")
 138 #define CHROMA_LONGTEXT N_( \
 139     "Force the use of a specific chroma. Use YUVA if you're planning " \
 140     "to use the Alphamask or Bluescreen video filter." );
 141
 142 #define CFG_PREFIX "sout-mosaic-bridge-"
 143
 144 vlc_module_begin();
 145     set_shortname( _( "Mosaic bridge" ) );
 146     set_description(_("Mosaic bridge stream output") );
 147     set_capability( "sout stream", 0 );
 148     add_shortcut( "mosaic-bridge" );
 149
 150     add_string( CFG_PREFIX "id", "Id", NULL, ID_TEXT, ID_LONGTEXT,
 151                 VLC_FALSE );
 152     add_integer( CFG_PREFIX "width", 0, NULL, WIDTH_TEXT,
 153                  WIDTH_LONGTEXT, VLC_TRUE );
 154     add_integer( CFG_PREFIX "height", 0, NULL, HEIGHT_TEXT,
 155                  HEIGHT_LONGTEXT, VLC_TRUE );
 156     add_string( CFG_PREFIX "sar", "1:1", NULL, RATIO_TEXT,
 157                 RATIO_LONGTEXT, VLC_FALSE );
 158     add_string( CFG_PREFIX "chroma", 0, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 159                 VLC_FALSE );
 160
 161     add_module_list( CFG_PREFIX "vfilter", "video filter2",
 162                      NULL, NULL, VFILTER_TEXT, VFILTER_LONGTEXT, VLC_FALSE );
 163
 164     set_callbacks( Open, Close );
 165 vlc_module_end();
 166
 167 static const char *ppsz_sout_options[] = {
 168     "id", "width", "height", "sar", "vfilter", "chroma", NULL
 169 };
 170
 171 /*****************************************************************************
 172  * Open
 173  *****************************************************************************/
 174 static int Open( vlc_object_t *p_this )
 175 {
 176     sout_stream_t        *p_stream = (sout_stream_t *)p_this;
 177     sout_stream_sys_t    *p_sys;
 178     vlc_object_t         *p_libvlc = p_this->p_libvlc;
 179     vlc_value_t           val;
 180
 181     config_ChainParse( p_stream, CFG_PREFIX, ppsz_sout_options,
 182                        p_stream->p_cfg );
 183
 184     p_sys = malloc( sizeof( sout_stream_sys_t ) );
 185     if( !p_sys )
 186     {
 187         return VLC_ENOMEM;
 188     }
 189
 190     p_stream->p_sys = p_sys;
 191     p_sys->b_inited = VLC_FALSE;
 192
 193     var_Create( p_libvlc, "mosaic-lock", VLC_VAR_MUTEX );
 194     var_Get( p_libvlc, "mosaic-lock", &val );
 195     p_sys->p_lock = val.p_address;
 196
 197     var_Get( p_stream, CFG_PREFIX "id", &val );
 198     p_sys->psz_id = val.psz_string;
 199
 200     p_sys->i_height =
 201         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "height" );
 202     var_AddCallback( p_stream, CFG_PREFIX "height", MosaicBridgeCallback,
 203                      p_stream );
 204
 205     p_sys->i_width =
 206         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "width" );
 207     var_AddCallback( p_stream, CFG_PREFIX "width", MosaicBridgeCallback,
 208                      p_stream );
 209
 210     var_Get( p_stream, CFG_PREFIX "sar", &val );
 211     if ( val.psz_string )
 212     {
 213         char *psz_parser = strchr( val.psz_string, ':' );
 214
 215         if( psz_parser )
 216         {
 217             *psz_parser++ = '\0';
 218             p_sys->i_sar_num = atoi( val.psz_string );
 219             p_sys->i_sar_den = atoi( psz_parser );
 220             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 221                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 222         }
 223         else
 224         {
 225             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 226             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 227         }
 228
 229         free( val.psz_string );
 230     }
 231     else
 232     {
 233         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 234     }
 235
 236     p_sys->i_chroma = 0;
 237     val.psz_string = var_GetNonEmptyString( p_stream, CFG_PREFIX "chroma" );
 238     if( val.psz_string && strlen( val.psz_string ) >= 4 )
 239     {
 240         memcpy( &p_sys->i_chroma, val.psz_string, 4 );
 241         msg_Dbg( p_stream, "Forcing image chroma to 0x%.8x (%4.4s)", p_sys->i_chroma, (char*)&p_sys->i_chroma );
 242     }
 243
 244     p_stream->pf_add    = Add;
 245     p_stream->pf_del    = Del;
 246     p_stream->pf_send   = Send;
 247
 248     p_stream->p_sout->i_out_pace_nocontrol++;
 249
 250     return VLC_SUCCESS;
 251 }
 252
 253 /*****************************************************************************
 254  * Close
 255  *****************************************************************************/
 256 static void Close( vlc_object_t * p_this )
 257 {
 258     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 259     sout_stream_sys_t *p_sys = p_stream->p_sys;
 260
 261     p_stream->p_sout->i_out_pace_nocontrol--;
 262
 263     if ( p_sys->psz_id )
 264         free( p_sys->psz_id );
 265
 266     free( p_sys );
 267 }
 268
 269 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 270 {
 271     sout_stream_sys_t *p_sys = p_stream->p_sys;
 272     bridge_t *p_bridge;
 273     bridged_es_t *p_es;
 274     char *psz_chain, *psz_parser;
 275     int i;
 276
 277     if ( p_sys->b_inited )
 278     {
 279         return NULL;
 280     }
 281
 282     /* Create decoder object */
 283     p_sys->p_decoder = vlc_object_create( p_stream, VLC_OBJECT_DECODER );
 284     vlc_object_attach( p_sys->p_decoder, p_stream );
 285     p_sys->p_decoder->p_module = NULL;
 286     p_sys->p_decoder->fmt_in = *p_fmt;
 287     p_sys->p_decoder->b_pace_control = VLC_FALSE;
 288     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 289     p_sys->p_decoder->fmt_out.i_extra = 0;
 290     p_sys->p_decoder->fmt_out.p_extra = 0;
 291     p_sys->p_decoder->pf_decode_video = 0;
 292     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 293     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer_decoder;
 294     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 295     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 296     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 297     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 298         p_sys->p_decoder->p_owner->pp_pics[i] = 0;
 299     p_sys->p_decoder->p_owner->video = p_fmt->video;
 300     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 301
 302     p_sys->p_decoder->p_module =
 303         module_Need( p_sys->p_decoder, "decoder", "$codec", 0 );
 304
 305     if( !p_sys->p_decoder->p_module )
 306     {
 307         msg_Err( p_stream, "cannot find decoder" );
 308         vlc_object_detach( p_sys->p_decoder );
 309         vlc_object_destroy( p_sys->p_decoder );
 310         return NULL;
 311     }
 312
 313     p_sys->b_inited = VLC_TRUE;
 314     vlc_mutex_lock( p_sys->p_lock );
 315
 316     p_bridge = GetBridge( p_stream );
 317     if ( p_bridge == NULL )
 318     {
 319         vlc_object_t *p_libvlc = p_stream->p_libvlc;
 320         vlc_value_t val;
 321
 322         p_bridge = malloc( sizeof( bridge_t ) );
 323
 324         var_Create( p_libvlc, "mosaic-struct", VLC_VAR_ADDRESS );
 325         val.p_address = p_bridge;
 326         var_Set( p_libvlc, "mosaic-struct", val );
 327
 328         p_bridge->i_es_num = 0;
 329         p_bridge->pp_es = NULL;
 330     }
 331
 332     for ( i = 0; i < p_bridge->i_es_num; i++ )
 333     {
 334         if ( p_bridge->pp_es[i]->b_empty )
 335             break;
 336     }
 337
 338     if ( i == p_bridge->i_es_num )
 339     {
 340         p_bridge->pp_es = realloc( p_bridge->pp_es,
 341                                    (p_bridge->i_es_num + 1)
 342                                      * sizeof(bridged_es_t *) );
 343         p_bridge->i_es_num++;
 344         p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
 345     }
 346
 347     p_sys->p_es = p_es = p_bridge->pp_es[i];
 348
 349     //p_es->fmt = *p_fmt;
 350     p_es->psz_id = p_sys->psz_id;
 351     p_es->p_picture = NULL;
 352     p_es->pp_last = &p_es->p_picture;
 353     p_es->b_empty = VLC_FALSE;
 354
 355     vlc_mutex_unlock( p_sys->p_lock );
 356
 357     if ( p_sys->i_height || p_sys->i_width )
 358     {
 359         p_sys->p_image = image_HandlerCreate( p_stream );
 360     }
 361     else
 362     {
 363         p_sys->p_image = NULL;
 364     }
 365
 366     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 367
 368     /* Create user specified video filters */
 369     psz_chain = var_GetNonEmptyString( p_stream, CFG_PREFIX "vfilter" );
 370     msg_Dbg( p_stream, "psz_chain: %s\n", psz_chain );
 371     {
 372         config_chain_t *p_cfg;
 373         for( p_cfg = p_stream->p_cfg; p_cfg != NULL; p_cfg = p_cfg->p_next )
 374         {
 375             msg_Dbg( p_stream, " - %s\n", p_cfg->psz_value );
 376         }
 377     }
 378     p_sys->i_vfilters = 0;
 379     p_sys->pp_vfilters = NULL;
 380     psz_parser = psz_chain;
 381     while( psz_parser && *psz_parser )
 382     {
 383         config_chain_t *p_cfg;
 384         char *psz_name;
 385         filter_t **pp_vfilter;
 386         psz_parser = config_ChainCreate( &psz_name, &p_cfg, psz_parser );
 387         p_sys->i_vfilters++;
 388         p_sys->pp_vfilters =
 389             (filter_t **)realloc( p_sys->pp_vfilters,
 390                                   p_sys->i_vfilters * sizeof(filter_t *) );
 391         pp_vfilter = p_sys->pp_vfilters+(p_sys->i_vfilters - 1);
 392         *pp_vfilter = vlc_object_create( p_stream, VLC_OBJECT_FILTER );
 393         vlc_object_attach( *pp_vfilter, p_stream );
 394         (*pp_vfilter)->pf_vout_buffer_new = video_new_buffer_filter;
 395         (*pp_vfilter)->pf_vout_buffer_del = video_del_buffer_filter;
 396         (*pp_vfilter)->fmt_in = p_sys->p_decoder->fmt_out;
 397         if( p_sys->i_chroma )
 398             (*pp_vfilter)->fmt_in.video.i_chroma = p_sys->i_chroma;
 399         (*pp_vfilter)->fmt_out = (*pp_vfilter)->fmt_in;
 400         (*pp_vfilter)->p_cfg = p_cfg;
 401         (*pp_vfilter)->p_module =
 402             module_Need( *pp_vfilter, "video filter2", psz_name, VLC_TRUE );
 403         if( (*pp_vfilter)->p_module )
 404         {
 405             /* It worked! */
 406             (*pp_vfilter)->p_owner = (filter_owner_sys_t *)
 407                 p_sys->p_decoder->p_owner;
 408             msg_Err( p_stream, "Added video filter %s to the chain",
 409                      psz_name );
 410         }
 411         else
 412         {
 413             /* Crap ... we didn't find a filter */
 414             msg_Warn( p_stream,
 415                       "no video filter matching name \"%s\" found",
 416                       psz_name );
 417             vlc_object_detach( *pp_vfilter );
 418             vlc_object_destroy( *pp_vfilter );
 419             p_sys->i_vfilters--;
 420         }
 421     }
 422     free( psz_chain );
 423
 424     return (sout_stream_id_t *)p_sys;
 425 }
 426
 427 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 428 {
 429     sout_stream_sys_t *p_sys = p_stream->p_sys;
 430     bridge_t *p_bridge;
 431     bridged_es_t *p_es;
 432     vlc_bool_t b_last_es = VLC_TRUE;
 433     filter_t **pp_vfilter, **pp_end;
 434     int i;
 435
 436     if ( !p_sys->b_inited )
 437     {
 438         return VLC_SUCCESS;
 439     }
 440
 441     if ( p_sys->p_decoder != NULL )
 442     {
 443         picture_t **pp_ring = p_sys->p_decoder->p_owner->pp_pics;
 444
 445         if( p_sys->p_decoder->p_module )
 446             module_Unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 447         vlc_object_detach( p_sys->p_decoder );
 448         vlc_object_destroy( p_sys->p_decoder );
 449
 450         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 451         {
 452             if ( pp_ring[i] != NULL )
 453             {
 454                 if ( pp_ring[i]->p_data_orig != NULL )
 455                     free( pp_ring[i]->p_data_orig );
 456                 free( pp_ring[i]->p_sys );
 457                 free( pp_ring[i] );
 458             }
 459         }
 460     }
 461
 462     /* Destroy user specified video filters */
 463     pp_vfilter = p_sys->pp_vfilters;
 464     pp_end = pp_vfilter + p_sys->i_vfilters;
 465     for( ; pp_vfilter < pp_end; pp_vfilter++ )
 466     {
 467         vlc_object_detach( *pp_vfilter );
 468         if( (*pp_vfilter)->p_module )
 469             module_Unneed( *pp_vfilter, (*pp_vfilter)->p_module );
 470         vlc_object_destroy( *pp_vfilter );
 471     }
 472     free( p_sys->pp_vfilters );
 473
 474     vlc_mutex_lock( p_sys->p_lock );
 475
 476     p_bridge = GetBridge( p_stream );
 477     p_es = p_sys->p_es;
 478
 479     p_es->b_empty = VLC_TRUE;
 480     while ( p_es->p_picture )
 481     {
 482         picture_t *p_next = p_es->p_picture->p_next;
 483         p_es->p_picture->pf_release( p_es->p_picture );
 484         p_es->p_picture = p_next;
 485     }
 486
 487     for ( i = 0; i < p_bridge->i_es_num; i++ )
 488     {
 489         if ( !p_bridge->pp_es[i]->b_empty )
 490         {
 491             b_last_es = VLC_FALSE;
 492             break;
 493         }
 494     }
 495
 496     if ( b_last_es )
 497     {
 498         vlc_object_t *p_libvlc = p_stream->p_libvlc;
 499         for ( i = 0; i < p_bridge->i_es_num; i++ )
 500             free( p_bridge->pp_es[i] );
 501         free( p_bridge->pp_es );
 502         free( p_bridge );
 503         var_Destroy( p_libvlc, "mosaic-struct" );
 504     }
 505
 506     vlc_mutex_unlock( p_sys->p_lock );
 507
 508     if ( p_sys->p_image )
 509     {
 510         image_HandlerDelete( p_sys->p_image );
 511     }
 512
 513     p_sys->b_inited = VLC_FALSE;
 514
 515     return VLC_SUCCESS;
 516 }
 517
 518 /*****************************************************************************
 519  * PushPicture : push a picture in the mosaic-struct structure
 520  *****************************************************************************/
 521 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 522 {
 523     sout_stream_sys_t *p_sys = p_stream->p_sys;
 524     bridged_es_t *p_es = p_sys->p_es;
 525
 526     vlc_mutex_lock( p_sys->p_lock );
 527
 528     *p_es->pp_last = p_picture;
 529     p_picture->p_next = NULL;
 530     p_es->pp_last = &p_picture->p_next;
 531
 532     vlc_mutex_unlock( p_sys->p_lock );
 533 }
 534
 535 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 536                  block_t *p_buffer )
 537 {
 538     sout_stream_sys_t *p_sys = p_stream->p_sys;
 539     picture_t *p_pic;
 540
 541     if ( (sout_stream_sys_t *)id != p_sys )
 542     {
 543         block_ChainRelease( p_buffer );
 544         return VLC_SUCCESS;
 545     }
 546
 547     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 548                                                         &p_buffer )) )
 549     {
 550         picture_t *p_new_pic;
 551
 552         if( p_sys->i_height || p_sys->i_width )
 553         {
 554             video_format_t fmt_out, fmt_in;
 555
 556             memset( &fmt_in, 0, sizeof(video_format_t) );
 557             memset( &fmt_out, 0, sizeof(video_format_t) );
 558             fmt_in = p_sys->p_decoder->fmt_out.video;
 559
 560
 561             if( p_sys->i_chroma )
 562                 fmt_out.i_chroma = p_sys->i_chroma;
 563             else
 564                 fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
 565
 566             if ( !p_sys->i_height )
 567             {
 568                 fmt_out.i_width = p_sys->i_width;
 569                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 570                     * p_sys->i_sar_num / p_sys->i_sar_den / fmt_in.i_aspect)
 571                       & ~0x1;
 572             }
 573             else if ( !p_sys->i_width )
 574             {
 575                 fmt_out.i_height = p_sys->i_height;
 576                 fmt_out.i_width = (p_sys->i_height * fmt_in.i_aspect
 577                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 578                       & ~0x1;
 579             }
 580             else
 581             {
 582                 fmt_out.i_width = p_sys->i_width;
 583                 fmt_out.i_height = p_sys->i_height;
 584             }
 585             fmt_out.i_visible_width = fmt_out.i_width;
 586             fmt_out.i_visible_height = fmt_out.i_height;
 587
 588             p_new_pic = image_Convert( p_sys->p_image,
 589                                        p_pic, &fmt_in, &fmt_out );
 590             if ( p_new_pic == NULL )
 591             {
 592                 msg_Err( p_stream, "image conversion failed" );
 593                 continue;
 594             }
 595         }
 596         else
 597         {
 598             /* TODO: chroma conversion if needed */
 599
 600             p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
 601             if( p_new_pic == NULL )
 602             {
 603                 msg_Err( p_stream, "image conversion failed" );
 604                 continue;
 605             }
 606
 607             if( vout_AllocatePicture(
 608                                   p_stream, p_new_pic, p_pic->format.i_chroma,
 609                                   p_pic->format.i_width, p_pic->format.i_height,
 610                                   p_sys->p_decoder->fmt_out.video.i_aspect )
 611                 != VLC_SUCCESS )
 612             {
 613                 free( p_new_pic );
 614                 msg_Err( p_stream, "image allocation failed" );
 615                 continue;
 616             }
 617
 618             vout_CopyPicture( p_stream, p_new_pic, p_pic );
 619         }
 620
 621         p_new_pic->i_refcount = 1;
 622         p_new_pic->i_status = DESTROYED_PICTURE;
 623         p_new_pic->i_type   = DIRECT_PICTURE;
 624         p_new_pic->p_sys = (picture_sys_t *)p_new_pic->pf_release;
 625         p_new_pic->pf_release = ReleasePicture;
 626         p_new_pic->date = p_pic->date;
 627         p_pic->pf_release( p_pic );
 628
 629         if( p_sys->pp_vfilters )
 630         {
 631             /* Apply user specified video filters */
 632             filter_t **pp_vfilter = p_sys->pp_vfilters;
 633             filter_t **pp_end = pp_vfilter + p_sys->i_vfilters;
 634             for( ; pp_vfilter < pp_end; pp_vfilter++ )
 635             {
 636                 (*pp_vfilter)->fmt_in.i_codec = p_new_pic->format.i_chroma;
 637                 (*pp_vfilter)->fmt_out.i_codec = p_new_pic->format.i_chroma;
 638                 (*pp_vfilter)->fmt_in.video = p_new_pic->format;
 639                 (*pp_vfilter)->fmt_out.video = p_new_pic->format;
 640                 p_new_pic = (*pp_vfilter)->pf_video_filter( *pp_vfilter,
 641                                                              p_new_pic );
 642                 if( !p_new_pic )
 643                 {
 644                     msg_Err( p_stream, "video filter failed" );
 645                     break;
 646                 }
 647             }
 648             if( !p_new_pic ) continue;
 649         }
 650
 651         PushPicture( p_stream, p_new_pic );
 652     }
 653
 654     return VLC_SUCCESS;
 655 }
 656
 657 struct picture_sys_t
 658 {
 659     vlc_object_t *p_owner;
 660     vlc_bool_t b_dead;
 661 };
 662
 663 static void video_release_buffer_decoder( picture_t *p_pic )
 664 {
 665     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
 666     {
 667         video_del_buffer_decoder( (decoder_t *)p_pic->p_sys->p_owner, p_pic );
 668     }
 669     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
 670 }
 671
 672 static void video_release_buffer_filter( picture_t *p_pic )
 673 {
 674     if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
 675     {
 676         video_del_buffer_filter( (filter_t *)p_pic->p_sys->p_owner, p_pic );
 677     }
 678     else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
 679 }
 680
 681 inline static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
 682 {
 683     return video_new_buffer( VLC_OBJECT( p_dec ),
 684                              (decoder_owner_sys_t *)p_dec->p_owner,
 685                              &p_dec->fmt_out,
 686                              video_release_buffer_decoder );
 687 }
 688
 689 inline static picture_t *video_new_buffer_filter( filter_t *p_filter )
 690 {
 691     return video_new_buffer( VLC_OBJECT( p_filter ),
 692                              (decoder_owner_sys_t *)p_filter->p_owner,
 693                              &p_filter->fmt_out,
 694                              video_release_buffer_filter );
 695 }
 696
 697 static picture_t *video_new_buffer( vlc_object_t *p_this,
 698                                     decoder_owner_sys_t *p_sys,
 699                                     es_format_t *fmt_out,
 700                                     void ( *pf_release )( picture_t * ) )
 701 {
 702     picture_t **pp_ring = p_sys->pp_pics;
 703     picture_t *p_pic;
 704     int i;
 705
 706     if( fmt_out->video.i_width != p_sys->video.i_width ||
 707         fmt_out->video.i_height != p_sys->video.i_height ||
 708         fmt_out->video.i_chroma != p_sys->video.i_chroma ||
 709         fmt_out->video.i_aspect != p_sys->video.i_aspect )
 710     {
 711         if( !fmt_out->video.i_sar_num ||
 712             !fmt_out->video.i_sar_den )
 713         {
 714             fmt_out->video.i_sar_num =
 715                 fmt_out->video.i_aspect * fmt_out->video.i_height;
 716
 717             fmt_out->video.i_sar_den =
 718                 VOUT_ASPECT_FACTOR * fmt_out->video.i_width;
 719         }
 720
 721         vlc_ureduce( &fmt_out->video.i_sar_num,
 722                      &fmt_out->video.i_sar_den,
 723                      fmt_out->video.i_sar_num,
 724                      fmt_out->video.i_sar_den, 0 );
 725
 726         if( !fmt_out->video.i_visible_width ||
 727             !fmt_out->video.i_visible_height )
 728         {
 729             fmt_out->video.i_visible_width = fmt_out->video.i_width;
 730             fmt_out->video.i_visible_height = fmt_out->video.i_height;
 731         }
 732
 733         fmt_out->video.i_chroma = fmt_out->i_codec;
 734         p_sys->video = fmt_out->video;
 735
 736         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 737         {
 738             if ( pp_ring[i] != NULL )
 739             {
 740                 if ( pp_ring[i]->i_status == DESTROYED_PICTURE )
 741                 {
 742                     if ( pp_ring[i]->p_data_orig != NULL )
 743                         free( pp_ring[i]->p_data_orig );
 744                     free( pp_ring[i]->p_sys );
 745                     free( pp_ring[i] );
 746                 }
 747                 else
 748                 {
 749                     pp_ring[i]->p_sys->b_dead = VLC_TRUE;
 750                 }
 751                 pp_ring[i] = NULL;
 752             }
 753         }
 754     }
 755
 756     /* Find an empty space in the picture ring buffer */
 757     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 758     {
 759         if( pp_ring[i] != NULL && pp_ring[i]->i_status == DESTROYED_PICTURE )
 760         {
 761             pp_ring[i]->i_status = RESERVED_PICTURE;
 762             return pp_ring[i];
 763         }
 764     }
 765     for( i = 0; i < PICTURE_RING_SIZE; i++ )
 766     {
 767         if( pp_ring[i] == NULL ) break;
 768     }
 769
 770     if( i == PICTURE_RING_SIZE )
 771     {
 772         msg_Err( p_this, "decoder/filter is leaking pictures, "
 773                  "resetting its ring buffer" );
 774
 775         for( i = 0; i < PICTURE_RING_SIZE; i++ )
 776         {
 777             pp_ring[i]->pf_release( pp_ring[i] );
 778         }
 779
 780         i = 0;
 781     }
 782
 783     p_pic = malloc( sizeof(picture_t) );
 784     fmt_out->video.i_chroma = fmt_out->i_codec;
 785     vout_AllocatePicture( p_this, p_pic,
 786                           fmt_out->video.i_chroma,
 787                           fmt_out->video.i_width,
 788                           fmt_out->video.i_height,
 789                           fmt_out->video.i_aspect );
 790
 791     if( !p_pic->i_planes )
 792     {
 793         free( p_pic );
 794         return NULL;
 795     }
 796
 797     p_pic->pf_release = pf_release;
 798     p_pic->p_sys = malloc( sizeof(picture_sys_t) );
 799     p_pic->p_sys->p_owner = p_this;
 800     p_pic->p_sys->b_dead = VLC_FALSE;
 801     p_pic->i_status = RESERVED_PICTURE;
 802
 803     pp_ring[i] = p_pic;
 804
 805     return p_pic;
 806 }
 807
 808 inline static void video_del_buffer_decoder( decoder_t *p_this,
 809                                              picture_t *p_pic )
 810 {
 811     video_del_buffer( VLC_OBJECT( p_this ), p_pic );
 812 }
 813
 814 inline static void video_del_buffer_filter( filter_t *p_this,
 815                                             picture_t *p_pic )
 816 {
 817     video_del_buffer( VLC_OBJECT( p_this ), p_pic );
 818 }
 819
 820 static void video_del_buffer( vlc_object_t *p_this, picture_t *p_pic )
 821 {
 822     p_pic->i_refcount = 0;
 823     p_pic->i_status = DESTROYED_PICTURE;
 824     if ( p_pic->p_sys->b_dead )
 825     {
 826         if ( p_pic->p_data_orig != NULL )
 827             free( p_pic->p_data_orig );
 828         free( p_pic->p_sys );
 829         free( p_pic );
 830     }
 831 }
 832
 833 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 834 {
 835     p_pic->i_refcount++;
 836 }
 837
 838 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 839 {
 840     video_release_buffer_decoder( p_pic );
 841 }
 842
 843
 844 /**********************************************************************
 845  * Callback to update (some) params on the fly
 846  **********************************************************************/
 847 static int MosaicBridgeCallback( vlc_object_t *p_this, char const *psz_var,
 848                                  vlc_value_t oldval, vlc_value_t newval,
 849                                  void *p_data )
 850 {
 851     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 852     sout_stream_sys_t *p_sys = p_stream->p_sys;
 853     int i_ret = VLC_SUCCESS;
 854
 855 #define VAR_IS( a ) !strcmp( psz_var, CFG_PREFIX a )
 856     if( VAR_IS( "height" ) )
 857     {
 858         /* We create the handler before updating the value in p_sys
 859          * so we don't have to worry about locking */
 860         if( !p_sys->p_image && newval.i_int )
 861             p_sys->p_image = image_HandlerCreate( p_stream );
 862         p_sys->i_height = newval.i_int;
 863     }
 864     else if( VAR_IS( "width" ) )
 865     {
 866         /* We create the handler before updating the value in p_sys
 867          * so we don't have to worry about locking */
 868         if( !p_sys->p_image && newval.i_int )
 869             p_sys->p_image = image_HandlerCreate( p_stream );
 870         p_sys->i_width = newval.i_int;
 871     }
 872 #undef VAR_IS
 873
 874     return i_ret;
 875 }