modules/stream_out/mosaic_bridge.c

   1 /*****************************************************************************
   2  * mosaic_bridge.c:
   3  *****************************************************************************
   4  * Copyright (C) 2004-2007 VLC authors and VideoLAN
   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 it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_sout.h>
  36 #include <vlc_block.h>
  37 #include <vlc_codec.h>
  38 #include <vlc_meta.h>
  39
  40 #include <vlc_image.h>
  41 #include <vlc_filter.h>
  42 #include <vlc_modules.h>
  43
  44 #include "../video_filter/mosaic.h"
  45
  46 /*****************************************************************************
  47  * Local structures
  48  *****************************************************************************/
  49 struct sout_stream_sys_t
  50 {
  51     bridged_es_t *p_es;
  52
  53     decoder_t       *p_decoder;
  54     image_handler_t *p_image; /* filter for resizing */
  55     int i_height, i_width;
  56     unsigned int i_sar_num, i_sar_den;
  57     char *psz_id;
  58     bool b_inited;
  59
  60     int i_chroma; /* force image format chroma */
  61
  62     filter_chain_t *p_vf2;
  63 };
  64
  65 struct decoder_owner_sys_t
  66 {
  67     /* Current format in use by the output */
  68     video_format_t video;
  69 };
  70
  71 /*****************************************************************************
  72  * Local prototypes
  73  *****************************************************************************/
  74 static int  Open    ( vlc_object_t * );
  75 static void Close   ( vlc_object_t * );
  76 static sout_stream_id_sys_t *Add ( sout_stream_t *, es_format_t * );
  77 static int               Del ( sout_stream_t *, sout_stream_id_sys_t * );
  78 static int               Send( sout_stream_t *, sout_stream_id_sys_t *, block_t * );
  79
  80 inline static void video_del_buffer_decoder( decoder_t *, picture_t * );
  81 inline static void video_del_buffer_filter( filter_t *, picture_t * );
  82
  83 inline static picture_t *video_new_buffer_decoder( decoder_t * );
  84 inline static picture_t *video_new_buffer_filter( filter_t * );
  85 static picture_t *video_new_buffer( vlc_object_t *, decoder_owner_sys_t *,
  86                                     es_format_t * );
  87
  88 static void video_link_picture_decoder( decoder_t *, picture_t * );
  89 static void video_unlink_picture_decoder( decoder_t *, picture_t * );
  90
  91 static int HeightCallback( vlc_object_t *, char const *,
  92                            vlc_value_t, vlc_value_t, void * );
  93 static int WidthCallback( vlc_object_t *, char const *,
  94                           vlc_value_t, vlc_value_t, void * );
  95 static int alphaCallback( vlc_object_t *, char const *,
  96                           vlc_value_t, vlc_value_t, void * );
  97 static int xCallback( vlc_object_t *, char const *,
  98                       vlc_value_t, vlc_value_t, void * );
  99 static int yCallback( vlc_object_t *, char const *,
 100                       vlc_value_t, vlc_value_t, void * );
 101
 102 /*****************************************************************************
 103  * Module descriptor
 104  *****************************************************************************/
 105 #define ID_TEXT N_("ID")
 106 #define ID_LONGTEXT N_( \
 107     "Specify an identifier string for this subpicture" )
 108
 109 #define WIDTH_TEXT N_("Video width")
 110 #define WIDTH_LONGTEXT N_( \
 111     "Output video width." )
 112 #define HEIGHT_TEXT N_("Video height")
 113 #define HEIGHT_LONGTEXT N_( \
 114     "Output video height." )
 115 #define RATIO_TEXT N_("Sample aspect ratio")
 116 #define RATIO_LONGTEXT N_( \
 117     "Sample aspect ratio of the destination (1:1, 3:4, 2:3)." )
 118
 119 #define VFILTER_TEXT N_("Video filter")
 120 #define VFILTER_LONGTEXT N_( \
 121     "Video filters will be applied to the video stream." )
 122
 123 #define CHROMA_TEXT N_("Image chroma")
 124 #define CHROMA_LONGTEXT N_( \
 125     "Force the use of a specific chroma. Use YUVA if you're planning " \
 126     "to use the Alphamask or Bluescreen video filter." )
 127
 128 #define ALPHA_TEXT N_("Transparency")
 129 #define ALPHA_LONGTEXT N_( \
 130     "Transparency of the mosaic picture." )
 131
 132 #define X_TEXT N_("X offset")
 133 #define X_LONGTEXT N_( \
 134     "X coordinate of the upper left corner in the mosaic if non negative." )
 135
 136 #define Y_TEXT N_("Y offset")
 137 #define Y_LONGTEXT N_( \
 138     "Y coordinate of the upper left corner in the mosaic if non negative." )
 139
 140 #define CFG_PREFIX "sout-mosaic-bridge-"
 141
 142 vlc_module_begin ()
 143     set_shortname( N_( "Mosaic bridge" ) )
 144     set_description(N_("Mosaic bridge stream output") )
 145     set_capability( "sout stream", 0 )
 146     add_shortcut( "mosaic-bridge" )
 147
 148     add_string( CFG_PREFIX "id", "Id", ID_TEXT, ID_LONGTEXT,
 149                 false )
 150     add_integer( CFG_PREFIX "width", 0, WIDTH_TEXT,
 151                  WIDTH_LONGTEXT, true )
 152     add_integer( CFG_PREFIX "height", 0, HEIGHT_TEXT,
 153                  HEIGHT_LONGTEXT, true )
 154     add_string( CFG_PREFIX "sar", "1:1", RATIO_TEXT,
 155                 RATIO_LONGTEXT, false )
 156     add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 157                 false )
 158
 159     add_module_list( CFG_PREFIX "vfilter", "video filter2",
 160                      NULL, VFILTER_TEXT, VFILTER_LONGTEXT, false )
 161
 162     add_integer_with_range( CFG_PREFIX "alpha", 255, 0, 255,
 163                             ALPHA_TEXT, ALPHA_LONGTEXT, false )
 164     add_integer( CFG_PREFIX "x", -1, X_TEXT, X_LONGTEXT, false )
 165     add_integer( CFG_PREFIX "y", -1, Y_TEXT, Y_LONGTEXT, false )
 166
 167     set_callbacks( Open, Close )
 168 vlc_module_end ()
 169
 170 static const char *const ppsz_sout_options[] = {
 171     "id", "width", "height", "sar", "vfilter", "chroma", "alpha", "x", "y", NULL
 172 };
 173
 174 /*****************************************************************************
 175  * Open
 176  *****************************************************************************/
 177 static int Open( vlc_object_t *p_this )
 178 {
 179     sout_stream_t        *p_stream = (sout_stream_t *)p_this;
 180     sout_stream_sys_t    *p_sys;
 181     vlc_value_t           val;
 182
 183     config_ChainParse( p_stream, CFG_PREFIX, ppsz_sout_options,
 184                        p_stream->p_cfg );
 185
 186     p_sys = malloc( sizeof( sout_stream_sys_t ) );
 187     if( !p_sys )
 188         return VLC_ENOMEM;
 189
 190     p_stream->p_sys = p_sys;
 191     p_sys->b_inited = false;
 192
 193     p_sys->psz_id = var_CreateGetString( p_stream, CFG_PREFIX "id" );
 194
 195     p_sys->i_height =
 196         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "height" );
 197     var_AddCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 198
 199     p_sys->i_width =
 200         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "width" );
 201     var_AddCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 202
 203     var_Get( p_stream, CFG_PREFIX "sar", &val );
 204     if( val.psz_string )
 205     {
 206         char *psz_parser = strchr( val.psz_string, ':' );
 207
 208         if( psz_parser )
 209         {
 210             *psz_parser++ = '\0';
 211             p_sys->i_sar_num = atoi( val.psz_string );
 212             p_sys->i_sar_den = atoi( psz_parser );
 213             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 214                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 215         }
 216         else
 217         {
 218             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 219             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 220         }
 221
 222         free( val.psz_string );
 223     }
 224     else
 225     {
 226         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 227     }
 228
 229     p_sys->i_chroma = 0;
 230     val.psz_string = var_GetNonEmptyString( p_stream, CFG_PREFIX "chroma" );
 231     if( val.psz_string && strlen( val.psz_string ) >= 4 )
 232     {
 233         memcpy( &p_sys->i_chroma, val.psz_string, 4 );
 234         msg_Dbg( p_stream, "Forcing image chroma to 0x%.8x (%4.4s)", p_sys->i_chroma, (char*)&p_sys->i_chroma );
 235     }
 236     free( val.psz_string );
 237
 238 #define INT_COMMAND( a ) do { \
 239     var_Create( p_stream, CFG_PREFIX #a, \
 240                 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND ); \
 241     var_AddCallback( p_stream, CFG_PREFIX #a, a ## Callback, \
 242                      p_stream ); } while(0)
 243     INT_COMMAND( alpha );
 244     INT_COMMAND( x );
 245     INT_COMMAND( y );
 246
 247 #undef INT_COMMAND
 248
 249     p_stream->pf_add    = Add;
 250     p_stream->pf_del    = Del;
 251     p_stream->pf_send   = Send;
 252     p_stream->pace_nocontrol = true;
 253
 254     return VLC_SUCCESS;
 255 }
 256
 257 /*****************************************************************************
 258  * Close
 259  *****************************************************************************/
 260 static void Close( vlc_object_t * p_this )
 261 {
 262     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 263     sout_stream_sys_t *p_sys = p_stream->p_sys;
 264
 265     /* Delete the callbacks */
 266     var_DelCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 267     var_DelCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 268     var_DelCallback( p_stream, CFG_PREFIX "alpha", alphaCallback, p_stream );
 269     var_DelCallback( p_stream, CFG_PREFIX "x", xCallback, p_stream );
 270     var_DelCallback( p_stream, CFG_PREFIX "y", yCallback, p_stream );
 271
 272     free( p_sys->psz_id );
 273
 274     free( p_sys );
 275 }
 276
 277 static int video_filter_buffer_allocation_init( filter_t *p_filter, void *p_data )
 278 {
 279     p_filter->pf_video_buffer_new = video_new_buffer_filter;
 280     p_filter->pf_video_buffer_del = video_del_buffer_filter;
 281     p_filter->p_owner = p_data;
 282     return VLC_SUCCESS;
 283 }
 284
 285 static sout_stream_id_sys_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 286 {
 287     sout_stream_sys_t *p_sys = p_stream->p_sys;
 288     bridge_t *p_bridge;
 289     bridged_es_t *p_es;
 290     char *psz_chain;
 291     int i;
 292
 293     if( p_sys->b_inited || p_fmt->i_cat != VIDEO_ES )
 294         return NULL;
 295
 296     /* Create decoder object */
 297     p_sys->p_decoder = vlc_object_create( p_stream, sizeof( decoder_t ) );
 298     if( !p_sys->p_decoder )
 299         return NULL;
 300     p_sys->p_decoder->p_module = NULL;
 301     p_sys->p_decoder->fmt_in = *p_fmt;
 302     p_sys->p_decoder->b_pace_control = false;
 303     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 304     p_sys->p_decoder->fmt_out.i_extra = 0;
 305     p_sys->p_decoder->fmt_out.p_extra = 0;
 306     p_sys->p_decoder->pf_decode_video = 0;
 307     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 308     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer_decoder;
 309     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 310     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 311     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 312     if( !p_sys->p_decoder->p_owner )
 313     {
 314         vlc_object_release( p_sys->p_decoder );
 315         return NULL;
 316     }
 317
 318     p_sys->p_decoder->p_owner->video = p_fmt->video;
 319     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 320
 321     p_sys->p_decoder->p_module =
 322         module_need( p_sys->p_decoder, "decoder", "$codec", false );
 323
 324     if( !p_sys->p_decoder->p_module || !p_sys->p_decoder->pf_decode_video )
 325     {
 326         if( p_sys->p_decoder->p_module )
 327         {
 328             msg_Err( p_stream, "instanciated a non video decoder" );
 329             module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 330         }
 331         else
 332         {
 333             msg_Err( p_stream, "cannot find decoder" );
 334         }
 335         free( p_sys->p_decoder->p_owner );
 336         vlc_object_release( p_sys->p_decoder );
 337         return NULL;
 338     }
 339
 340     p_sys->b_inited = true;
 341     vlc_global_lock( VLC_MOSAIC_MUTEX );
 342
 343     p_bridge = GetBridge( p_stream );
 344     if ( p_bridge == NULL )
 345     {
 346         vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
 347         vlc_value_t val;
 348
 349         p_bridge = xmalloc( sizeof( bridge_t ) );
 350
 351         var_Create( p_libvlc, "mosaic-struct", VLC_VAR_ADDRESS );
 352         val.p_address = p_bridge;
 353         var_Set( p_libvlc, "mosaic-struct", val );
 354
 355         p_bridge->i_es_num = 0;
 356         p_bridge->pp_es = NULL;
 357     }
 358
 359     for ( i = 0; i < p_bridge->i_es_num; i++ )
 360     {
 361         if ( p_bridge->pp_es[i]->b_empty )
 362             break;
 363     }
 364
 365     if ( i == p_bridge->i_es_num )
 366     {
 367         p_bridge->pp_es = xrealloc( p_bridge->pp_es,
 368                           (p_bridge->i_es_num + 1) * sizeof(bridged_es_t *) );
 369         p_bridge->i_es_num++;
 370         p_bridge->pp_es[i] = xmalloc( sizeof(bridged_es_t) );
 371     }
 372
 373     p_sys->p_es = p_es = p_bridge->pp_es[i];
 374
 375     p_es->i_alpha = var_GetInteger( p_stream, CFG_PREFIX "alpha" );
 376     p_es->i_x = var_GetInteger( p_stream, CFG_PREFIX "x" );
 377     p_es->i_y = var_GetInteger( p_stream, CFG_PREFIX "y" );
 378
 379     //p_es->fmt = *p_fmt;
 380     p_es->psz_id = p_sys->psz_id;
 381     p_es->p_picture = NULL;
 382     p_es->pp_last = &p_es->p_picture;
 383     p_es->b_empty = false;
 384
 385     vlc_global_unlock( VLC_MOSAIC_MUTEX );
 386
 387     if ( p_sys->i_height || p_sys->i_width )
 388     {
 389         p_sys->p_image = image_HandlerCreate( p_stream );
 390     }
 391     else
 392     {
 393         p_sys->p_image = NULL;
 394     }
 395
 396     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 397
 398     /* Create user specified video filters */
 399     psz_chain = var_GetNonEmptyString( p_stream, CFG_PREFIX "vfilter" );
 400     msg_Dbg( p_stream, "psz_chain: %s", psz_chain );
 401     if( psz_chain )
 402     {
 403         p_sys->p_vf2 = filter_chain_New( p_stream, "video filter2", false,
 404                                          video_filter_buffer_allocation_init,
 405                                          NULL, p_sys->p_decoder->p_owner );
 406         es_format_t fmt;
 407         es_format_Copy( &fmt, &p_sys->p_decoder->fmt_out );
 408         if( p_sys->i_chroma )
 409             fmt.video.i_chroma = p_sys->i_chroma;
 410         filter_chain_Reset( p_sys->p_vf2, &fmt, &fmt );
 411         filter_chain_AppendFromString( p_sys->p_vf2, psz_chain );
 412         free( psz_chain );
 413     }
 414     else
 415     {
 416         p_sys->p_vf2 = NULL;
 417     }
 418
 419     return (sout_stream_id_sys_t *)p_sys;
 420 }
 421
 422 static int Del( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
 423 {
 424     VLC_UNUSED(id);
 425     sout_stream_sys_t *p_sys = p_stream->p_sys;
 426     bridge_t *p_bridge;
 427     bridged_es_t *p_es;
 428     bool b_last_es = true;
 429     int i;
 430
 431     if( !p_sys->b_inited )
 432         return VLC_SUCCESS;
 433
 434     if( p_sys->p_decoder != NULL )
 435     {
 436         decoder_owner_sys_t *p_owner = p_sys->p_decoder->p_owner;
 437
 438         if( p_sys->p_decoder->p_module )
 439             module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 440         if( p_sys->p_decoder->p_description )
 441             vlc_meta_Delete( p_sys->p_decoder->p_description );
 442
 443         vlc_object_release( p_sys->p_decoder );
 444
 445         free( p_owner );
 446     }
 447
 448     /* Destroy user specified video filters */
 449     if( p_sys->p_vf2 )
 450         filter_chain_Delete( p_sys->p_vf2 );
 451
 452     vlc_global_lock( VLC_MOSAIC_MUTEX );
 453
 454     p_bridge = GetBridge( p_stream );
 455     p_es = p_sys->p_es;
 456
 457     p_es->b_empty = true;
 458     while ( p_es->p_picture )
 459     {
 460         picture_t *p_next = p_es->p_picture->p_next;
 461         picture_Release( p_es->p_picture );
 462         p_es->p_picture = p_next;
 463     }
 464
 465     for ( i = 0; i < p_bridge->i_es_num; i++ )
 466     {
 467         if ( !p_bridge->pp_es[i]->b_empty )
 468         {
 469             b_last_es = false;
 470             break;
 471         }
 472     }
 473
 474     if ( b_last_es )
 475     {
 476         vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
 477         for ( i = 0; i < p_bridge->i_es_num; i++ )
 478             free( p_bridge->pp_es[i] );
 479         free( p_bridge->pp_es );
 480         free( p_bridge );
 481         var_Destroy( p_libvlc, "mosaic-struct" );
 482     }
 483
 484     vlc_global_unlock( VLC_MOSAIC_MUTEX );
 485
 486     if ( p_sys->p_image )
 487     {
 488         image_HandlerDelete( p_sys->p_image );
 489     }
 490
 491     p_sys->b_inited = false;
 492
 493     return VLC_SUCCESS;
 494 }
 495
 496 /*****************************************************************************
 497  * PushPicture : push a picture in the mosaic-struct structure
 498  *****************************************************************************/
 499 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 500 {
 501     sout_stream_sys_t *p_sys = p_stream->p_sys;
 502     bridged_es_t *p_es = p_sys->p_es;
 503
 504     vlc_global_lock( VLC_MOSAIC_MUTEX );
 505
 506     *p_es->pp_last = p_picture;
 507     p_picture->p_next = NULL;
 508     p_es->pp_last = &p_picture->p_next;
 509
 510     vlc_global_unlock( VLC_MOSAIC_MUTEX );
 511 }
 512
 513 static int Send( sout_stream_t *p_stream, sout_stream_id_sys_t *id,
 514                  block_t *p_buffer )
 515 {
 516     sout_stream_sys_t *p_sys = p_stream->p_sys;
 517     picture_t *p_pic;
 518
 519     if ( (sout_stream_sys_t *)id != p_sys )
 520     {
 521         block_ChainRelease( p_buffer );
 522         return VLC_SUCCESS;
 523     }
 524
 525     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 526                                                         &p_buffer )) )
 527     {
 528         picture_t *p_new_pic;
 529
 530         if( p_sys->i_height || p_sys->i_width )
 531         {
 532             video_format_t fmt_out, fmt_in;
 533
 534             memset( &fmt_in, 0, sizeof(video_format_t) );
 535             memset( &fmt_out, 0, sizeof(video_format_t) );
 536             fmt_in = p_sys->p_decoder->fmt_out.video;
 537
 538
 539             if( p_sys->i_chroma )
 540                 fmt_out.i_chroma = p_sys->i_chroma;
 541             else
 542                 fmt_out.i_chroma = VLC_CODEC_I420;
 543
 544             const unsigned i_fmt_in_aspect =
 545                 (int64_t)VOUT_ASPECT_FACTOR *
 546                 fmt_in.i_sar_num * fmt_in.i_width /
 547                 (fmt_in.i_sar_den * fmt_in.i_height);
 548             if ( !p_sys->i_height )
 549             {
 550                 fmt_out.i_width = p_sys->i_width;
 551                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 552                     * p_sys->i_sar_num / p_sys->i_sar_den / i_fmt_in_aspect)
 553                       & ~0x1;
 554             }
 555             else if ( !p_sys->i_width )
 556             {
 557                 fmt_out.i_height = p_sys->i_height;
 558                 fmt_out.i_width = (p_sys->i_height * i_fmt_in_aspect
 559                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 560                       & ~0x1;
 561             }
 562             else
 563             {
 564                 fmt_out.i_width = p_sys->i_width;
 565                 fmt_out.i_height = p_sys->i_height;
 566             }
 567             fmt_out.i_visible_width = fmt_out.i_width;
 568             fmt_out.i_visible_height = fmt_out.i_height;
 569
 570             p_new_pic = image_Convert( p_sys->p_image,
 571                                        p_pic, &fmt_in, &fmt_out );
 572             if( p_new_pic == NULL )
 573             {
 574                 msg_Err( p_stream, "image conversion failed" );
 575                 picture_Release( p_pic );
 576                 continue;
 577             }
 578         }
 579         else
 580         {
 581             /* TODO: chroma conversion if needed */
 582
 583             p_new_pic = picture_New( p_pic->format.i_chroma,
 584                                      p_pic->format.i_width, p_pic->format.i_height,
 585                                      p_sys->p_decoder->fmt_out.video.i_sar_num,
 586                                      p_sys->p_decoder->fmt_out.video.i_sar_den );
 587             if( !p_new_pic )
 588             {
 589                 picture_Release( p_pic );
 590                 msg_Err( p_stream, "image allocation failed" );
 591                 continue;
 592             }
 593
 594             picture_Copy( p_new_pic, p_pic );
 595         }
 596         picture_Release( p_pic );
 597
 598         if( p_sys->p_vf2 )
 599             p_new_pic = filter_chain_VideoFilter( p_sys->p_vf2, p_new_pic );
 600
 601         PushPicture( p_stream, p_new_pic );
 602     }
 603
 604     return VLC_SUCCESS;
 605 }
 606
 607 inline static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
 608 {
 609     return video_new_buffer( VLC_OBJECT( p_dec ),
 610                              (decoder_owner_sys_t *)p_dec->p_owner,
 611                              &p_dec->fmt_out );
 612 }
 613
 614 inline static picture_t *video_new_buffer_filter( filter_t *p_filter )
 615 {
 616     return video_new_buffer( VLC_OBJECT( p_filter ),
 617                              (decoder_owner_sys_t *)p_filter->p_owner,
 618                              &p_filter->fmt_out );
 619 }
 620
 621 static picture_t *video_new_buffer( vlc_object_t *p_this,
 622                                     decoder_owner_sys_t *p_sys,
 623                                     es_format_t *fmt_out )
 624 {
 625     VLC_UNUSED(p_this);
 626     if( fmt_out->video.i_width != p_sys->video.i_width ||
 627         fmt_out->video.i_height != p_sys->video.i_height ||
 628         fmt_out->video.i_chroma != p_sys->video.i_chroma ||
 629         (int64_t)fmt_out->video.i_sar_num * p_sys->video.i_sar_den !=
 630         (int64_t)fmt_out->video.i_sar_den * p_sys->video.i_sar_num )
 631     {
 632         vlc_ureduce( &fmt_out->video.i_sar_num,
 633                      &fmt_out->video.i_sar_den,
 634                      fmt_out->video.i_sar_num,
 635                      fmt_out->video.i_sar_den, 0 );
 636
 637         if( !fmt_out->video.i_visible_width ||
 638             !fmt_out->video.i_visible_height )
 639         {
 640             fmt_out->video.i_visible_width = fmt_out->video.i_width;
 641             fmt_out->video.i_visible_height = fmt_out->video.i_height;
 642         }
 643
 644         fmt_out->video.i_chroma = fmt_out->i_codec;
 645         p_sys->video = fmt_out->video;
 646     }
 647
 648     /* */
 649     fmt_out->video.i_chroma = fmt_out->i_codec;
 650
 651     return picture_NewFromFormat( &fmt_out->video );
 652 }
 653
 654 inline static void video_del_buffer_decoder( decoder_t *p_this,
 655                                              picture_t *p_pic )
 656 {
 657     VLC_UNUSED(p_this);
 658     picture_Release( p_pic );
 659 }
 660
 661 inline static void video_del_buffer_filter( filter_t *p_this,
 662                                             picture_t *p_pic )
 663 {
 664     VLC_UNUSED(p_this);
 665     picture_Release( p_pic );
 666 }
 667
 668 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 669 {
 670     VLC_UNUSED(p_dec);
 671     picture_Hold( p_pic );
 672 }
 673
 674 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 675 {
 676     VLC_UNUSED(p_dec);
 677     picture_Release( p_pic );
 678 }
 679
 680
 681 /**********************************************************************
 682  * Callback to update (some) params on the fly
 683  **********************************************************************/
 684 static int HeightCallback( vlc_object_t *p_this, char const *psz_var,
 685                            vlc_value_t oldval, vlc_value_t newval,
 686                            void *p_data )
 687 {
 688     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 689     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 690     sout_stream_sys_t *p_sys = p_stream->p_sys;
 691
 692     /* We create the handler before updating the value in p_sys
 693      * so we don't have to worry about locking */
 694     if( !p_sys->p_image && newval.i_int )
 695         p_sys->p_image = image_HandlerCreate( p_stream );
 696     p_sys->i_height = newval.i_int;
 697
 698     return VLC_SUCCESS;
 699 }
 700
 701 static int WidthCallback( vlc_object_t *p_this, char const *psz_var,
 702                            vlc_value_t oldval, vlc_value_t newval,
 703                            void *p_data )
 704 {
 705     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 706     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 707     sout_stream_sys_t *p_sys = p_stream->p_sys;
 708
 709     /* We create the handler before updating the value in p_sys
 710      * so we don't have to worry about locking */
 711     if( !p_sys->p_image && newval.i_int )
 712         p_sys->p_image = image_HandlerCreate( p_stream );
 713     p_sys->i_width = newval.i_int;
 714
 715     return VLC_SUCCESS;
 716 }
 717
 718 static int alphaCallback( vlc_object_t *p_this, char const *psz_var,
 719                           vlc_value_t oldval, vlc_value_t newval,
 720                           void *p_data )
 721 {
 722     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 723     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 724     sout_stream_sys_t *p_sys = p_stream->p_sys;
 725
 726     if( p_sys->p_es )
 727         p_sys->p_es->i_alpha = newval.i_int;
 728
 729     return VLC_SUCCESS;
 730 }
 731
 732 static int xCallback( vlc_object_t *p_this, char const *psz_var,
 733                       vlc_value_t oldval, vlc_value_t newval,
 734                       void *p_data )
 735 {
 736     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 737     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 738     sout_stream_sys_t *p_sys = p_stream->p_sys;
 739
 740     if( p_sys->p_es )
 741         p_sys->p_es->i_x = newval.i_int;
 742
 743     return VLC_SUCCESS;
 744 }
 745
 746 static int yCallback( vlc_object_t *p_this, char const *psz_var,
 747                       vlc_value_t oldval, vlc_value_t newval,
 748                       void *p_data )
 749 {
 750     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 751     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 752     sout_stream_sys_t *p_sys = p_stream->p_sys;
 753
 754     if( p_sys->p_es )
 755         p_sys->p_es->i_y = newval.i_int;
 756
 757     return VLC_SUCCESS;
 758 }