git.sesse.net Git - vlc/blob - 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 int video_update_format_decoder( decoder_t *p_dec );
  84 inline static picture_t *video_new_buffer_decoder( decoder_t * );
  85 inline static picture_t *video_new_buffer_filter( filter_t * );
  86 static int video_update_format( vlc_object_t *, decoder_owner_sys_t *,
  87                                 es_format_t * );
  88
  89 static void video_link_picture_decoder( decoder_t *, picture_t * );
  90 static void video_unlink_picture_decoder( decoder_t *, picture_t * );
  91
  92 static int HeightCallback( vlc_object_t *, char const *,
  93                            vlc_value_t, vlc_value_t, void * );
  94 static int WidthCallback( vlc_object_t *, char const *,
  95                           vlc_value_t, vlc_value_t, void * );
  96 static int alphaCallback( vlc_object_t *, char const *,
  97                           vlc_value_t, vlc_value_t, void * );
  98 static int xCallback( vlc_object_t *, char const *,
  99                       vlc_value_t, vlc_value_t, void * );
 100 static int yCallback( vlc_object_t *, char const *,
 101                       vlc_value_t, vlc_value_t, void * );
 102
 103 /*****************************************************************************
 104  * Module descriptor
 105  *****************************************************************************/
 106 #define ID_TEXT N_("ID")
 107 #define ID_LONGTEXT N_( \
 108     "Specify an identifier string for this subpicture" )
 109
 110 #define WIDTH_TEXT N_("Video width")
 111 #define WIDTH_LONGTEXT N_( \
 112     "Output video width." )
 113 #define HEIGHT_TEXT N_("Video height")
 114 #define HEIGHT_LONGTEXT N_( \
 115     "Output video height." )
 116 #define RATIO_TEXT N_("Sample aspect ratio")
 117 #define RATIO_LONGTEXT N_( \
 118     "Sample aspect ratio of the destination (1:1, 3:4, 2:3)." )
 119
 120 #define VFILTER_TEXT N_("Video filter")
 121 #define VFILTER_LONGTEXT N_( \
 122     "Video filters will be applied to the video stream." )
 123
 124 #define CHROMA_TEXT N_("Image chroma")
 125 #define CHROMA_LONGTEXT N_( \
 126     "Force the use of a specific chroma. Use YUVA if you're planning " \
 127     "to use the Alphamask or Bluescreen video filter." )
 128
 129 #define ALPHA_TEXT N_("Transparency")
 130 #define ALPHA_LONGTEXT N_( \
 131     "Transparency of the mosaic picture." )
 132
 133 #define X_TEXT N_("X offset")
 134 #define X_LONGTEXT N_( \
 135     "X coordinate of the upper left corner in the mosaic if non negative." )
 136
 137 #define Y_TEXT N_("Y offset")
 138 #define Y_LONGTEXT N_( \
 139     "Y coordinate of the upper left corner in the mosaic if non negative." )
 140
 141 #define CFG_PREFIX "sout-mosaic-bridge-"
 142
 143 vlc_module_begin ()
 144     set_shortname( N_( "Mosaic bridge" ) )
 145     set_description(N_("Mosaic bridge stream output") )
 146     set_capability( "sout stream", 0 )
 147     add_shortcut( "mosaic-bridge" )
 148
 149     add_string( CFG_PREFIX "id", "Id", ID_TEXT, ID_LONGTEXT,
 150                 false )
 151     add_integer( CFG_PREFIX "width", 0, WIDTH_TEXT,
 152                  WIDTH_LONGTEXT, true )
 153     add_integer( CFG_PREFIX "height", 0, HEIGHT_TEXT,
 154                  HEIGHT_LONGTEXT, true )
 155     add_string( CFG_PREFIX "sar", "1:1", RATIO_TEXT,
 156                 RATIO_LONGTEXT, false )
 157     add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 158                 false )
 159
 160     add_module_list( CFG_PREFIX "vfilter", "video filter2",
 161                      NULL, VFILTER_TEXT, VFILTER_LONGTEXT, false )
 162
 163     add_integer_with_range( CFG_PREFIX "alpha", 255, 0, 255,
 164                             ALPHA_TEXT, ALPHA_LONGTEXT, false )
 165     add_integer( CFG_PREFIX "x", -1, X_TEXT, X_LONGTEXT, false )
 166     add_integer( CFG_PREFIX "y", -1, Y_TEXT, Y_LONGTEXT, false )
 167
 168     set_callbacks( Open, Close )
 169 vlc_module_end ()
 170
 171 static const char *const ppsz_sout_options[] = {
 172     "id", "width", "height", "sar", "vfilter", "chroma", "alpha", "x", "y", NULL
 173 };
 174
 175 /*****************************************************************************
 176  * Open
 177  *****************************************************************************/
 178 static int Open( vlc_object_t *p_this )
 179 {
 180     sout_stream_t        *p_stream = (sout_stream_t *)p_this;
 181     sout_stream_sys_t    *p_sys;
 182     vlc_value_t           val;
 183
 184     config_ChainParse( p_stream, CFG_PREFIX, ppsz_sout_options,
 185                        p_stream->p_cfg );
 186
 187     p_sys = malloc( sizeof( sout_stream_sys_t ) );
 188     if( !p_sys )
 189         return VLC_ENOMEM;
 190
 191     p_stream->p_sys = p_sys;
 192     p_sys->b_inited = false;
 193
 194     p_sys->psz_id = var_CreateGetString( p_stream, CFG_PREFIX "id" );
 195
 196     p_sys->i_height =
 197         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "height" );
 198     var_AddCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 199
 200     p_sys->i_width =
 201         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "width" );
 202     var_AddCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 203
 204     var_Get( p_stream, CFG_PREFIX "sar", &val );
 205     if( val.psz_string )
 206     {
 207         char *psz_parser = strchr( val.psz_string, ':' );
 208
 209         if( psz_parser )
 210         {
 211             *psz_parser++ = '\0';
 212             p_sys->i_sar_num = atoi( val.psz_string );
 213             p_sys->i_sar_den = atoi( psz_parser );
 214             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 215                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 216         }
 217         else
 218         {
 219             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 220             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 221         }
 222
 223         free( val.psz_string );
 224     }
 225     else
 226     {
 227         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 228     }
 229
 230     p_sys->i_chroma = 0;
 231     val.psz_string = var_GetNonEmptyString( p_stream, CFG_PREFIX "chroma" );
 232     if( val.psz_string && strlen( val.psz_string ) >= 4 )
 233     {
 234         memcpy( &p_sys->i_chroma, val.psz_string, 4 );
 235         msg_Dbg( p_stream, "Forcing image chroma to 0x%.8x (%4.4s)", p_sys->i_chroma, (char*)&p_sys->i_chroma );
 236     }
 237     free( val.psz_string );
 238
 239 #define INT_COMMAND( a ) do { \
 240     var_Create( p_stream, CFG_PREFIX #a, \
 241                 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND ); \
 242     var_AddCallback( p_stream, CFG_PREFIX #a, a ## Callback, \
 243                      p_stream ); } while(0)
 244     INT_COMMAND( alpha );
 245     INT_COMMAND( x );
 246     INT_COMMAND( y );
 247
 248 #undef INT_COMMAND
 249
 250     p_stream->pf_add    = Add;
 251     p_stream->pf_del    = Del;
 252     p_stream->pf_send   = Send;
 253     p_stream->pace_nocontrol = true;
 254
 255     return VLC_SUCCESS;
 256 }
 257
 258 /*****************************************************************************
 259  * Close
 260  *****************************************************************************/
 261 static void Close( vlc_object_t * p_this )
 262 {
 263     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 264     sout_stream_sys_t *p_sys = p_stream->p_sys;
 265
 266     /* Delete the callbacks */
 267     var_DelCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 268     var_DelCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 269     var_DelCallback( p_stream, CFG_PREFIX "alpha", alphaCallback, p_stream );
 270     var_DelCallback( p_stream, CFG_PREFIX "x", xCallback, p_stream );
 271     var_DelCallback( p_stream, CFG_PREFIX "y", yCallback, p_stream );
 272
 273     free( p_sys->psz_id );
 274
 275     free( p_sys );
 276 }
 277
 278 static sout_stream_id_sys_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 279 {
 280     sout_stream_sys_t *p_sys = p_stream->p_sys;
 281     bridge_t *p_bridge;
 282     bridged_es_t *p_es;
 283     char *psz_chain;
 284     int i;
 285
 286     if( p_sys->b_inited || p_fmt->i_cat != VIDEO_ES )
 287         return NULL;
 288
 289     /* Create decoder object */
 290     p_sys->p_decoder = vlc_object_create( p_stream, sizeof( decoder_t ) );
 291     if( !p_sys->p_decoder )
 292         return NULL;
 293     p_sys->p_decoder->p_module = NULL;
 294     p_sys->p_decoder->fmt_in = *p_fmt;
 295     p_sys->p_decoder->b_pace_control = false;
 296     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 297     p_sys->p_decoder->fmt_out.i_extra = 0;
 298     p_sys->p_decoder->fmt_out.p_extra = 0;
 299     p_sys->p_decoder->pf_decode_video = 0;
 300     p_sys->p_decoder->pf_vout_format_update = video_update_format_decoder;
 301     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 302     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer_decoder;
 303     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 304     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 305     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 306     if( !p_sys->p_decoder->p_owner )
 307     {
 308         vlc_object_release( p_sys->p_decoder );
 309         return NULL;
 310     }
 311
 312     p_sys->p_decoder->p_owner->video = p_fmt->video;
 313     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 314
 315     p_sys->p_decoder->p_module =
 316         module_need( p_sys->p_decoder, "decoder", "$codec", false );
 317
 318     if( !p_sys->p_decoder->p_module || !p_sys->p_decoder->pf_decode_video )
 319     {
 320         if( p_sys->p_decoder->p_module )
 321         {
 322             msg_Err( p_stream, "instanciated a non video decoder" );
 323             module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 324         }
 325         else
 326         {
 327             msg_Err( p_stream, "cannot find decoder" );
 328         }
 329         free( p_sys->p_decoder->p_owner );
 330         vlc_object_release( p_sys->p_decoder );
 331         return NULL;
 332     }
 333
 334     p_sys->b_inited = true;
 335     vlc_global_lock( VLC_MOSAIC_MUTEX );
 336
 337     p_bridge = GetBridge( p_stream );
 338     if ( p_bridge == NULL )
 339     {
 340         vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
 341         vlc_value_t val;
 342
 343         p_bridge = xmalloc( sizeof( bridge_t ) );
 344
 345         var_Create( p_libvlc, "mosaic-struct", VLC_VAR_ADDRESS );
 346         val.p_address = p_bridge;
 347         var_Set( p_libvlc, "mosaic-struct", val );
 348
 349         p_bridge->i_es_num = 0;
 350         p_bridge->pp_es = NULL;
 351     }
 352
 353     for ( i = 0; i < p_bridge->i_es_num; i++ )
 354     {
 355         if ( p_bridge->pp_es[i]->b_empty )
 356             break;
 357     }
 358
 359     if ( i == p_bridge->i_es_num )
 360     {
 361         p_bridge->pp_es = xrealloc( p_bridge->pp_es,
 362                           (p_bridge->i_es_num + 1) * sizeof(bridged_es_t *) );
 363         p_bridge->i_es_num++;
 364         p_bridge->pp_es[i] = xmalloc( sizeof(bridged_es_t) );
 365     }
 366
 367     p_sys->p_es = p_es = p_bridge->pp_es[i];
 368
 369     p_es->i_alpha = var_GetInteger( p_stream, CFG_PREFIX "alpha" );
 370     p_es->i_x = var_GetInteger( p_stream, CFG_PREFIX "x" );
 371     p_es->i_y = var_GetInteger( p_stream, CFG_PREFIX "y" );
 372
 373     //p_es->fmt = *p_fmt;
 374     p_es->psz_id = p_sys->psz_id;
 375     p_es->p_picture = NULL;
 376     p_es->pp_last = &p_es->p_picture;
 377     p_es->b_empty = false;
 378
 379     vlc_global_unlock( VLC_MOSAIC_MUTEX );
 380
 381     if ( p_sys->i_height || p_sys->i_width )
 382     {
 383         p_sys->p_image = image_HandlerCreate( p_stream );
 384     }
 385     else
 386     {
 387         p_sys->p_image = NULL;
 388     }
 389
 390     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 391
 392     /* Create user specified video filters */
 393     psz_chain = var_GetNonEmptyString( p_stream, CFG_PREFIX "vfilter" );
 394     msg_Dbg( p_stream, "psz_chain: %s", psz_chain );
 395     if( psz_chain )
 396     {
 397         filter_owner_t owner = {
 398             .sys = p_sys->p_decoder->p_owner,
 399             .video = {
 400                 .buffer_new = video_new_buffer_filter,
 401                 .buffer_del = video_del_buffer_filter,
 402             },
 403         };
 404
 405         p_sys->p_vf2 = filter_chain_NewVideo( p_stream, false, &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 int video_update_format_decoder( decoder_t *p_dec )
 608 {
 609     return video_update_format( 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_decoder( decoder_t *p_dec )
 615 {
 616     return picture_NewFromFormat( &p_dec->fmt_out.video );
 617 }
 618
 619 inline static picture_t *video_new_buffer_filter( filter_t *p_filter )
 620 {
 621     if( video_update_format( VLC_OBJECT( p_filter ),
 622                              (decoder_owner_sys_t *)p_filter->owner.sys,
 623                              &p_filter->fmt_out ) ) {
 624         msg_Warn( p_filter, "can't get output picture" );
 625         return NULL;
 626     }
 627     return picture_NewFromFormat( &p_filter->fmt_out.video );
 628 }
 629
 630 static int video_update_format( vlc_object_t *p_this,
 631                                     decoder_owner_sys_t *p_sys,
 632                                     es_format_t *fmt_out )
 633 {
 634     VLC_UNUSED(p_this);
 635     if( fmt_out->video.i_width != p_sys->video.i_width ||
 636         fmt_out->video.i_height != p_sys->video.i_height ||
 637         fmt_out->video.i_chroma != p_sys->video.i_chroma ||
 638         (int64_t)fmt_out->video.i_sar_num * p_sys->video.i_sar_den !=
 639         (int64_t)fmt_out->video.i_sar_den * p_sys->video.i_sar_num )
 640     {
 641         vlc_ureduce( &fmt_out->video.i_sar_num,
 642                      &fmt_out->video.i_sar_den,
 643                      fmt_out->video.i_sar_num,
 644                      fmt_out->video.i_sar_den, 0 );
 645
 646         if( !fmt_out->video.i_visible_width ||
 647             !fmt_out->video.i_visible_height )
 648         {
 649             fmt_out->video.i_visible_width = fmt_out->video.i_width;
 650             fmt_out->video.i_visible_height = fmt_out->video.i_height;
 651         }
 652
 653         fmt_out->video.i_chroma = fmt_out->i_codec;
 654         p_sys->video = fmt_out->video;
 655     }
 656
 657     /* */
 658     fmt_out->video.i_chroma = fmt_out->i_codec;
 659     return 0;
 660 }
 661
 662 inline static void video_del_buffer_decoder( decoder_t *p_this,
 663                                              picture_t *p_pic )
 664 {
 665     VLC_UNUSED(p_this);
 666     picture_Release( p_pic );
 667 }
 668
 669 inline static void video_del_buffer_filter( filter_t *p_this,
 670                                             picture_t *p_pic )
 671 {
 672     VLC_UNUSED(p_this);
 673     picture_Release( p_pic );
 674 }
 675
 676 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 677 {
 678     VLC_UNUSED(p_dec);
 679     picture_Hold( p_pic );
 680 }
 681
 682 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 683 {
 684     VLC_UNUSED(p_dec);
 685     picture_Release( p_pic );
 686 }
 687
 688
 689 /**********************************************************************
 690  * Callback to update (some) params on the fly
 691  **********************************************************************/
 692 static int HeightCallback( vlc_object_t *p_this, char const *psz_var,
 693                            vlc_value_t oldval, vlc_value_t newval,
 694                            void *p_data )
 695 {
 696     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 697     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 698     sout_stream_sys_t *p_sys = p_stream->p_sys;
 699
 700     /* We create the handler before updating the value in p_sys
 701      * so we don't have to worry about locking */
 702     if( !p_sys->p_image && newval.i_int )
 703         p_sys->p_image = image_HandlerCreate( p_stream );
 704     p_sys->i_height = newval.i_int;
 705
 706     return VLC_SUCCESS;
 707 }
 708
 709 static int WidthCallback( vlc_object_t *p_this, char const *psz_var,
 710                            vlc_value_t oldval, vlc_value_t newval,
 711                            void *p_data )
 712 {
 713     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 714     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 715     sout_stream_sys_t *p_sys = p_stream->p_sys;
 716
 717     /* We create the handler before updating the value in p_sys
 718      * so we don't have to worry about locking */
 719     if( !p_sys->p_image && newval.i_int )
 720         p_sys->p_image = image_HandlerCreate( p_stream );
 721     p_sys->i_width = newval.i_int;
 722
 723     return VLC_SUCCESS;
 724 }
 725
 726 static int alphaCallback( vlc_object_t *p_this, char const *psz_var,
 727                           vlc_value_t oldval, vlc_value_t newval,
 728                           void *p_data )
 729 {
 730     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 731     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 732     sout_stream_sys_t *p_sys = p_stream->p_sys;
 733
 734     if( p_sys->p_es )
 735         p_sys->p_es->i_alpha = newval.i_int;
 736
 737     return VLC_SUCCESS;
 738 }
 739
 740 static int xCallback( vlc_object_t *p_this, char const *psz_var,
 741                       vlc_value_t oldval, vlc_value_t newval,
 742                       void *p_data )
 743 {
 744     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 745     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 746     sout_stream_sys_t *p_sys = p_stream->p_sys;
 747
 748     if( p_sys->p_es )
 749         p_sys->p_es->i_x = newval.i_int;
 750
 751     return VLC_SUCCESS;
 752 }
 753
 754 static int yCallback( vlc_object_t *p_this, char const *psz_var,
 755                       vlc_value_t oldval, vlc_value_t newval,
 756                       void *p_data )
 757 {
 758     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 759     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 760     sout_stream_sys_t *p_sys = p_stream->p_sys;
 761
 762     if( p_sys->p_es )
 763         p_sys->p_es->i_y = newval.i_int;
 764
 765     return VLC_SUCCESS;
 766 }