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
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <errno.h>                                                 /* ENOMEM */
  34
  35 #include <vlc_common.h>
  36 #include <vlc_plugin.h>
  37 #include <vlc_sout.h>
  38 #include <vlc_block.h>
  39 #include <vlc_codec.h>
  40 #include <vlc_meta.h>
  41
  42 #include <vlc_image.h>
  43 #include <vlc_filter.h>
  44
  45 #include "../video_filter/mosaic.h"
  46
  47 #include <assert.h>
  48
  49 /*****************************************************************************
  50  * Local structures
  51  *****************************************************************************/
  52 struct sout_stream_sys_t
  53 {
  54     bridged_es_t *p_es;
  55     vlc_mutex_t *p_lock;
  56
  57     decoder_t       *p_decoder;
  58     image_handler_t *p_image; /* filter for resizing */
  59     int i_height, i_width;
  60     unsigned int i_sar_num, i_sar_den;
  61     char *psz_id;
  62     bool b_inited;
  63
  64     int i_chroma; /* force image format chroma */
  65
  66     filter_chain_t *p_vf2;
  67 };
  68
  69 struct decoder_owner_sys_t
  70 {
  71     /* Current format in use by the output */
  72     video_format_t video;
  73 };
  74
  75 /*****************************************************************************
  76  * Local prototypes
  77  *****************************************************************************/
  78 static int  Open    ( vlc_object_t * );
  79 static void Close   ( vlc_object_t * );
  80 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
  81 static int               Del ( sout_stream_t *, sout_stream_id_t * );
  82 static int               Send( sout_stream_t *, sout_stream_id_t *, block_t * );
  83
  84 inline static void video_del_buffer_decoder( decoder_t *, picture_t * );
  85 inline static void video_del_buffer_filter( filter_t *, picture_t * );
  86
  87 inline static picture_t *video_new_buffer_decoder( decoder_t * );
  88 inline static picture_t *video_new_buffer_filter( filter_t * );
  89 static picture_t *video_new_buffer( vlc_object_t *, decoder_owner_sys_t *,
  90                                     es_format_t * );
  91
  92 static void video_link_picture_decoder( decoder_t *, picture_t * );
  93 static void video_unlink_picture_decoder( decoder_t *, picture_t * );
  94
  95 static int HeightCallback( vlc_object_t *, char const *,
  96                            vlc_value_t, vlc_value_t, void * );
  97 static int WidthCallback( vlc_object_t *, char const *,
  98                           vlc_value_t, vlc_value_t, void * );
  99 static int alphaCallback( vlc_object_t *, char const *,
 100                           vlc_value_t, vlc_value_t, void * );
 101 static int xCallback( vlc_object_t *, char const *,
 102                       vlc_value_t, vlc_value_t, void * );
 103 static int yCallback( vlc_object_t *, char const *,
 104                       vlc_value_t, vlc_value_t, void * );
 105
 106 /*****************************************************************************
 107  * Module descriptor
 108  *****************************************************************************/
 109 #define ID_TEXT N_("ID")
 110 #define ID_LONGTEXT N_( \
 111     "Specify an identifier string for this subpicture" )
 112
 113 #define WIDTH_TEXT N_("Video width")
 114 #define WIDTH_LONGTEXT N_( \
 115     "Output video width." )
 116 #define HEIGHT_TEXT N_("Video height")
 117 #define HEIGHT_LONGTEXT N_( \
 118     "Output video height." )
 119 #define RATIO_TEXT N_("Sample aspect ratio")
 120 #define RATIO_LONGTEXT N_( \
 121     "Sample aspect ratio of the destination (1:1, 3:4, 2:3)." )
 122
 123 #define VFILTER_TEXT N_("Video filter")
 124 #define VFILTER_LONGTEXT N_( \
 125     "Video filters will be applied to the video stream." )
 126
 127 #define CHROMA_TEXT N_("Image chroma")
 128 #define CHROMA_LONGTEXT N_( \
 129     "Force the use of a specific chroma. Use YUVA if you're planning " \
 130     "to use the Alphamask or Bluescreen video filter." )
 131
 132 #define ALPHA_TEXT N_("Transparency")
 133 #define ALPHA_LONGTEXT N_( \
 134     "Transparency of the mosaic picture." )
 135
 136 #define X_TEXT N_("X offset")
 137 #define X_LONGTEXT N_( \
 138     "X coordinate of the upper left corner in the mosaic if non negative." )
 139
 140 #define Y_TEXT N_("Y offset")
 141 #define Y_LONGTEXT N_( \
 142     "Y coordinate of the upper left corner in the mosaic if non negative." )
 143
 144 #define CFG_PREFIX "sout-mosaic-bridge-"
 145
 146 vlc_module_begin ()
 147     set_shortname( N_( "Mosaic bridge" ) )
 148     set_description(N_("Mosaic bridge stream output") )
 149     set_capability( "sout stream", 0 )
 150     add_shortcut( "mosaic-bridge" )
 151
 152     add_string( CFG_PREFIX "id", "Id", NULL, ID_TEXT, ID_LONGTEXT,
 153                 false )
 154     add_integer( CFG_PREFIX "width", 0, NULL, WIDTH_TEXT,
 155                  WIDTH_LONGTEXT, true )
 156     add_integer( CFG_PREFIX "height", 0, NULL, HEIGHT_TEXT,
 157                  HEIGHT_LONGTEXT, true )
 158     add_string( CFG_PREFIX "sar", "1:1", NULL, RATIO_TEXT,
 159                 RATIO_LONGTEXT, false )
 160     add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 161                 false )
 162
 163     add_module_list( CFG_PREFIX "vfilter", "video filter2",
 164                      NULL, NULL, VFILTER_TEXT, VFILTER_LONGTEXT, false )
 165
 166     add_integer_with_range( CFG_PREFIX "alpha", 255, 0, 255, NULL,
 167                             ALPHA_TEXT, ALPHA_LONGTEXT, false )
 168     add_integer( CFG_PREFIX "x", -1, NULL, X_TEXT, X_LONGTEXT, false )
 169     add_integer( CFG_PREFIX "y", -1, NULL, Y_TEXT, Y_LONGTEXT, false )
 170
 171     set_callbacks( Open, Close )
 172 vlc_module_end ()
 173
 174 static const char *const ppsz_sout_options[] = {
 175     "id", "width", "height", "sar", "vfilter", "chroma", "alpha", "x", "y", NULL
 176 };
 177
 178 /*****************************************************************************
 179  * Open
 180  *****************************************************************************/
 181 static int Open( vlc_object_t *p_this )
 182 {
 183     sout_stream_t        *p_stream = (sout_stream_t *)p_this;
 184     sout_stream_sys_t    *p_sys;
 185     vlc_object_t         *p_libvlc = VLC_OBJECT( p_this->p_libvlc );
 186     vlc_value_t           val;
 187
 188     config_ChainParse( p_stream, CFG_PREFIX, ppsz_sout_options,
 189                        p_stream->p_cfg );
 190
 191     p_sys = malloc( sizeof( sout_stream_sys_t ) );
 192     if( !p_sys )
 193         return VLC_ENOMEM;
 194
 195     p_stream->p_sys = p_sys;
 196     p_sys->b_inited = false;
 197
 198     var_Create( p_libvlc, "mosaic-lock", VLC_VAR_MUTEX );
 199     var_Get( p_libvlc, "mosaic-lock", &val );
 200     p_sys->p_lock = val.p_address;
 201
 202     p_sys->psz_id = var_CreateGetString( p_stream, CFG_PREFIX "id" );
 203
 204     p_sys->i_height =
 205         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "height" );
 206     var_AddCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 207
 208     p_sys->i_width =
 209         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "width" );
 210     var_AddCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 211
 212     var_Get( p_stream, CFG_PREFIX "sar", &val );
 213     if( val.psz_string )
 214     {
 215         char *psz_parser = strchr( val.psz_string, ':' );
 216
 217         if( psz_parser )
 218         {
 219             *psz_parser++ = '\0';
 220             p_sys->i_sar_num = atoi( val.psz_string );
 221             p_sys->i_sar_den = atoi( psz_parser );
 222             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 223                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 224         }
 225         else
 226         {
 227             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 228             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 229         }
 230
 231         free( val.psz_string );
 232     }
 233     else
 234     {
 235         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 236     }
 237
 238     p_sys->i_chroma = 0;
 239     val.psz_string = var_GetNonEmptyString( p_stream, CFG_PREFIX "chroma" );
 240     if( val.psz_string && strlen( val.psz_string ) >= 4 )
 241     {
 242         memcpy( &p_sys->i_chroma, val.psz_string, 4 );
 243         msg_Dbg( p_stream, "Forcing image chroma to 0x%.8x (%4.4s)", p_sys->i_chroma, (char*)&p_sys->i_chroma );
 244     }
 245     free( val.psz_string );
 246
 247 #define INT_COMMAND( a ) do { \
 248     var_Create( p_stream, CFG_PREFIX #a, \
 249                 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND ); \
 250     var_AddCallback( p_stream, CFG_PREFIX #a, a ## Callback, \
 251                      p_stream ); } while(0)
 252     INT_COMMAND( alpha );
 253     INT_COMMAND( x );
 254     INT_COMMAND( y );
 255
 256 #undef INT_COMMAND
 257
 258     p_stream->pf_add    = Add;
 259     p_stream->pf_del    = Del;
 260     p_stream->pf_send   = Send;
 261
 262     p_stream->p_sout->i_out_pace_nocontrol++;
 263
 264     return VLC_SUCCESS;
 265 }
 266
 267 /*****************************************************************************
 268  * Close
 269  *****************************************************************************/
 270 static void Close( vlc_object_t * p_this )
 271 {
 272     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 273     sout_stream_sys_t *p_sys = p_stream->p_sys;
 274
 275     /* Delete the callbacks */
 276     var_DelCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 277     var_DelCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 278     var_DelCallback( p_stream, CFG_PREFIX "alpha", alphaCallback, p_stream );
 279     var_DelCallback( p_stream, CFG_PREFIX "x", xCallback, p_stream );
 280     var_DelCallback( p_stream, CFG_PREFIX "y", yCallback, p_stream );
 281
 282     p_stream->p_sout->i_out_pace_nocontrol--;
 283
 284     free( p_sys->psz_id );
 285
 286     free( p_sys );
 287 }
 288
 289 static int video_filter_buffer_allocation_init( filter_t *p_filter, void *p_data )
 290 {
 291     p_filter->pf_vout_buffer_new = video_new_buffer_filter;
 292     p_filter->pf_vout_buffer_del = video_del_buffer_filter;
 293     p_filter->p_owner = p_data;
 294     return VLC_SUCCESS;
 295 }
 296
 297 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 298 {
 299     sout_stream_sys_t *p_sys = p_stream->p_sys;
 300     bridge_t *p_bridge;
 301     bridged_es_t *p_es;
 302     char *psz_chain;
 303     int i;
 304
 305     if( p_sys->b_inited || p_fmt->i_cat != VIDEO_ES )
 306         return NULL;
 307
 308     /* Create decoder object */
 309     p_sys->p_decoder = vlc_object_create( p_stream, VLC_OBJECT_DECODER );
 310     if( !p_sys->p_decoder )
 311         return NULL;
 312     vlc_object_attach( p_sys->p_decoder, p_stream );
 313     p_sys->p_decoder->p_module = NULL;
 314     p_sys->p_decoder->fmt_in = *p_fmt;
 315     p_sys->p_decoder->b_pace_control = false;
 316     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 317     p_sys->p_decoder->fmt_out.i_extra = 0;
 318     p_sys->p_decoder->fmt_out.p_extra = 0;
 319     p_sys->p_decoder->pf_decode_video = 0;
 320     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 321     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer_decoder;
 322     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 323     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 324     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 325     if( !p_sys->p_decoder->p_owner )
 326     {
 327         vlc_object_detach( p_sys->p_decoder );
 328         vlc_object_release( p_sys->p_decoder );
 329         return NULL;
 330     }
 331
 332     p_sys->p_decoder->p_owner->video = p_fmt->video;
 333     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 334
 335     p_sys->p_decoder->p_module =
 336         module_need( p_sys->p_decoder, "decoder", "$codec", false );
 337
 338     if( !p_sys->p_decoder->p_module || !p_sys->p_decoder->pf_decode_video )
 339     {
 340         if( p_sys->p_decoder->p_module )
 341         {
 342             msg_Err( p_stream, "instanciated a non video decoder" );
 343             module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 344         }
 345         else
 346         {
 347             msg_Err( p_stream, "cannot find decoder" );
 348         }
 349         free( p_sys->p_decoder->p_owner );
 350         vlc_object_detach( p_sys->p_decoder );
 351         vlc_object_release( p_sys->p_decoder );
 352         return NULL;
 353     }
 354
 355     p_sys->b_inited = true;
 356     vlc_mutex_lock( p_sys->p_lock );
 357
 358     p_bridge = GetBridge( p_stream );
 359     if ( p_bridge == NULL )
 360     {
 361         vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
 362         vlc_value_t val;
 363
 364         p_bridge = malloc( sizeof( bridge_t ) );
 365
 366         var_Create( p_libvlc, "mosaic-struct", VLC_VAR_ADDRESS );
 367         val.p_address = p_bridge;
 368         var_Set( p_libvlc, "mosaic-struct", val );
 369
 370         p_bridge->i_es_num = 0;
 371         p_bridge->pp_es = NULL;
 372     }
 373
 374     for ( i = 0; i < p_bridge->i_es_num; i++ )
 375     {
 376         if ( p_bridge->pp_es[i]->b_empty )
 377             break;
 378     }
 379
 380     if ( i == p_bridge->i_es_num )
 381     {
 382         p_bridge->pp_es = realloc( p_bridge->pp_es,
 383                                    (p_bridge->i_es_num + 1)
 384                                      * sizeof(bridged_es_t *) );
 385         p_bridge->i_es_num++;
 386         p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
 387     }
 388
 389     p_sys->p_es = p_es = p_bridge->pp_es[i];
 390
 391     p_es->i_alpha = var_GetInteger( p_stream, CFG_PREFIX "alpha" );
 392     p_es->i_x = var_GetInteger( p_stream, CFG_PREFIX "x" );
 393     p_es->i_y = var_GetInteger( p_stream, CFG_PREFIX "y" );
 394
 395     //p_es->fmt = *p_fmt;
 396     p_es->psz_id = p_sys->psz_id;
 397     p_es->p_picture = NULL;
 398     p_es->pp_last = &p_es->p_picture;
 399     p_es->b_empty = false;
 400
 401     vlc_mutex_unlock( p_sys->p_lock );
 402
 403     if ( p_sys->i_height || p_sys->i_width )
 404     {
 405         p_sys->p_image = image_HandlerCreate( p_stream );
 406     }
 407     else
 408     {
 409         p_sys->p_image = NULL;
 410     }
 411
 412     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 413
 414     /* Create user specified video filters */
 415     psz_chain = var_GetNonEmptyString( p_stream, CFG_PREFIX "vfilter" );
 416     msg_Dbg( p_stream, "psz_chain: %s", psz_chain );
 417     if( psz_chain )
 418     {
 419         p_sys->p_vf2 = filter_chain_New( p_stream, "video filter2", false,
 420                                          video_filter_buffer_allocation_init,
 421                                          NULL, p_sys->p_decoder->p_owner );
 422         es_format_t fmt;
 423         es_format_Copy( &fmt, &p_sys->p_decoder->fmt_out );
 424         if( p_sys->i_chroma )
 425             fmt.video.i_chroma = p_sys->i_chroma;
 426         filter_chain_Reset( p_sys->p_vf2, &fmt, &fmt );
 427         filter_chain_AppendFromString( p_sys->p_vf2, psz_chain );
 428         free( psz_chain );
 429     }
 430     else
 431     {
 432         p_sys->p_vf2 = NULL;
 433     }
 434
 435     return (sout_stream_id_t *)p_sys;
 436 }
 437
 438 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 439 {
 440     VLC_UNUSED(id);
 441     sout_stream_sys_t *p_sys = p_stream->p_sys;
 442     bridge_t *p_bridge;
 443     bridged_es_t *p_es;
 444     bool b_last_es = true;
 445     int i;
 446
 447     if( !p_sys->b_inited )
 448         return VLC_SUCCESS;
 449
 450     if( p_sys->p_decoder != NULL )
 451     {
 452         decoder_owner_sys_t *p_owner = p_sys->p_decoder->p_owner;
 453
 454         if( p_sys->p_decoder->p_module )
 455             module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 456         if( p_sys->p_decoder->p_description )
 457             vlc_meta_Delete( p_sys->p_decoder->p_description );
 458
 459         vlc_object_detach( p_sys->p_decoder );
 460         vlc_object_release( p_sys->p_decoder );
 461
 462         free( p_owner );
 463     }
 464
 465     /* Destroy user specified video filters */
 466     if( p_sys->p_vf2 )
 467         filter_chain_Delete( p_sys->p_vf2 );
 468
 469     vlc_mutex_lock( p_sys->p_lock );
 470
 471     p_bridge = GetBridge( p_stream );
 472     p_es = p_sys->p_es;
 473
 474     p_es->b_empty = true;
 475     while ( p_es->p_picture )
 476     {
 477         picture_t *p_next = p_es->p_picture->p_next;
 478         picture_Release( p_es->p_picture );
 479         p_es->p_picture = p_next;
 480     }
 481
 482     for ( i = 0; i < p_bridge->i_es_num; i++ )
 483     {
 484         if ( !p_bridge->pp_es[i]->b_empty )
 485         {
 486             b_last_es = false;
 487             break;
 488         }
 489     }
 490
 491     if ( b_last_es )
 492     {
 493         vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
 494         for ( i = 0; i < p_bridge->i_es_num; i++ )
 495             free( p_bridge->pp_es[i] );
 496         free( p_bridge->pp_es );
 497         free( p_bridge );
 498         var_Destroy( p_libvlc, "mosaic-struct" );
 499     }
 500
 501     vlc_mutex_unlock( p_sys->p_lock );
 502
 503     if ( p_sys->p_image )
 504     {
 505         image_HandlerDelete( p_sys->p_image );
 506     }
 507
 508     p_sys->b_inited = false;
 509
 510     return VLC_SUCCESS;
 511 }
 512
 513 /*****************************************************************************
 514  * PushPicture : push a picture in the mosaic-struct structure
 515  *****************************************************************************/
 516 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 517 {
 518     sout_stream_sys_t *p_sys = p_stream->p_sys;
 519     bridged_es_t *p_es = p_sys->p_es;
 520
 521     vlc_mutex_lock( p_sys->p_lock );
 522
 523     *p_es->pp_last = p_picture;
 524     p_picture->p_next = NULL;
 525     p_es->pp_last = &p_picture->p_next;
 526
 527     vlc_mutex_unlock( p_sys->p_lock );
 528 }
 529
 530 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 531                  block_t *p_buffer )
 532 {
 533     sout_stream_sys_t *p_sys = p_stream->p_sys;
 534     picture_t *p_pic;
 535
 536     if ( (sout_stream_sys_t *)id != p_sys )
 537     {
 538         block_ChainRelease( p_buffer );
 539         return VLC_SUCCESS;
 540     }
 541
 542     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 543                                                         &p_buffer )) )
 544     {
 545         picture_t *p_new_pic;
 546
 547         if( p_sys->i_height || p_sys->i_width )
 548         {
 549             video_format_t fmt_out, fmt_in;
 550
 551             memset( &fmt_in, 0, sizeof(video_format_t) );
 552             memset( &fmt_out, 0, sizeof(video_format_t) );
 553             fmt_in = p_sys->p_decoder->fmt_out.video;
 554
 555
 556             if( p_sys->i_chroma )
 557                 fmt_out.i_chroma = p_sys->i_chroma;
 558             else
 559                 fmt_out.i_chroma = VLC_CODEC_I420;
 560
 561             if ( !p_sys->i_height )
 562             {
 563                 fmt_out.i_width = p_sys->i_width;
 564                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 565                     * p_sys->i_sar_num / p_sys->i_sar_den / fmt_in.i_aspect)
 566                       & ~0x1;
 567             }
 568             else if ( !p_sys->i_width )
 569             {
 570                 fmt_out.i_height = p_sys->i_height;
 571                 fmt_out.i_width = (p_sys->i_height * fmt_in.i_aspect
 572                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 573                       & ~0x1;
 574             }
 575             else
 576             {
 577                 fmt_out.i_width = p_sys->i_width;
 578                 fmt_out.i_height = p_sys->i_height;
 579             }
 580             fmt_out.i_visible_width = fmt_out.i_width;
 581             fmt_out.i_visible_height = fmt_out.i_height;
 582
 583             p_new_pic = image_Convert( p_sys->p_image,
 584                                        p_pic, &fmt_in, &fmt_out );
 585             if( p_new_pic == NULL )
 586             {
 587                 msg_Err( p_stream, "image conversion failed" );
 588                 picture_Release( p_pic );
 589                 continue;
 590             }
 591         }
 592         else
 593         {
 594             /* TODO: chroma conversion if needed */
 595
 596             p_new_pic = picture_New( p_pic->format.i_chroma,
 597                                      p_pic->format.i_width, p_pic->format.i_height,
 598                                      p_sys->p_decoder->fmt_out.video.i_aspect );
 599             if( !p_new_pic )
 600             {
 601                 picture_Release( p_pic );
 602                 msg_Err( p_stream, "image allocation failed" );
 603                 continue;
 604             }
 605
 606             picture_Copy( p_new_pic, p_pic );
 607         }
 608         picture_Release( p_pic );
 609
 610         if( p_sys->p_vf2 )
 611             p_new_pic = filter_chain_VideoFilter( p_sys->p_vf2, p_new_pic );
 612
 613         PushPicture( p_stream, p_new_pic );
 614     }
 615
 616     return VLC_SUCCESS;
 617 }
 618
 619 inline static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
 620 {
 621     return video_new_buffer( VLC_OBJECT( p_dec ),
 622                              (decoder_owner_sys_t *)p_dec->p_owner,
 623                              &p_dec->fmt_out );
 624 }
 625
 626 inline static picture_t *video_new_buffer_filter( filter_t *p_filter )
 627 {
 628     return video_new_buffer( VLC_OBJECT( p_filter ),
 629                              (decoder_owner_sys_t *)p_filter->p_owner,
 630                              &p_filter->fmt_out );
 631 }
 632
 633 static picture_t *video_new_buffer( vlc_object_t *p_this,
 634                                     decoder_owner_sys_t *p_sys,
 635                                     es_format_t *fmt_out )
 636 {
 637     VLC_UNUSED(p_this);
 638     if( fmt_out->video.i_width != p_sys->video.i_width ||
 639         fmt_out->video.i_height != p_sys->video.i_height ||
 640         fmt_out->video.i_chroma != p_sys->video.i_chroma ||
 641         fmt_out->video.i_aspect != p_sys->video.i_aspect )
 642     {
 643         if( !fmt_out->video.i_sar_num ||
 644             !fmt_out->video.i_sar_den )
 645         {
 646             fmt_out->video.i_sar_num =
 647                 fmt_out->video.i_aspect * fmt_out->video.i_height;
 648
 649             fmt_out->video.i_sar_den =
 650                 VOUT_ASPECT_FACTOR * fmt_out->video.i_width;
 651         }
 652
 653         vlc_ureduce( &fmt_out->video.i_sar_num,
 654                      &fmt_out->video.i_sar_den,
 655                      fmt_out->video.i_sar_num,
 656                      fmt_out->video.i_sar_den, 0 );
 657
 658         if( !fmt_out->video.i_visible_width ||
 659             !fmt_out->video.i_visible_height )
 660         {
 661             fmt_out->video.i_visible_width = fmt_out->video.i_width;
 662             fmt_out->video.i_visible_height = fmt_out->video.i_height;
 663         }
 664
 665         fmt_out->video.i_chroma = fmt_out->i_codec;
 666         p_sys->video = fmt_out->video;
 667     }
 668
 669     /* */
 670     fmt_out->video.i_chroma = fmt_out->i_codec;
 671
 672     return picture_New( fmt_out->video.i_chroma,
 673                         fmt_out->video.i_width,
 674                         fmt_out->video.i_height,
 675                         fmt_out->video.i_aspect );
 676 }
 677
 678 inline static void video_del_buffer_decoder( decoder_t *p_this,
 679                                              picture_t *p_pic )
 680 {
 681     VLC_UNUSED(p_this);
 682     picture_Release( p_pic );
 683 }
 684
 685 inline static void video_del_buffer_filter( filter_t *p_this,
 686                                             picture_t *p_pic )
 687 {
 688     VLC_UNUSED(p_this);
 689     picture_Release( p_pic );
 690 }
 691
 692 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 693 {
 694     VLC_UNUSED(p_dec);
 695     picture_Hold( p_pic );
 696 }
 697
 698 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 699 {
 700     VLC_UNUSED(p_dec);
 701     picture_Release( p_pic );
 702 }
 703
 704
 705 /**********************************************************************
 706  * Callback to update (some) params on the fly
 707  **********************************************************************/
 708 static int HeightCallback( vlc_object_t *p_this, char const *psz_var,
 709                            vlc_value_t oldval, vlc_value_t newval,
 710                            void *p_data )
 711 {
 712     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 713     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 714     sout_stream_sys_t *p_sys = p_stream->p_sys;
 715
 716     /* We create the handler before updating the value in p_sys
 717      * so we don't have to worry about locking */
 718     if( !p_sys->p_image && newval.i_int )
 719         p_sys->p_image = image_HandlerCreate( p_stream );
 720     p_sys->i_height = newval.i_int;
 721
 722     return VLC_SUCCESS;
 723 }
 724
 725 static int WidthCallback( vlc_object_t *p_this, char const *psz_var,
 726                            vlc_value_t oldval, vlc_value_t newval,
 727                            void *p_data )
 728 {
 729     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 730     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 731     sout_stream_sys_t *p_sys = p_stream->p_sys;
 732
 733     /* We create the handler before updating the value in p_sys
 734      * so we don't have to worry about locking */
 735     if( !p_sys->p_image && newval.i_int )
 736         p_sys->p_image = image_HandlerCreate( p_stream );
 737     p_sys->i_width = newval.i_int;
 738
 739     return VLC_SUCCESS;
 740 }
 741
 742 static int alphaCallback( vlc_object_t *p_this, char const *psz_var,
 743                           vlc_value_t oldval, vlc_value_t newval,
 744                           void *p_data )
 745 {
 746     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 747     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 748     sout_stream_sys_t *p_sys = p_stream->p_sys;
 749
 750     if( p_sys->p_es )
 751         p_sys->p_es->i_alpha = newval.i_int;
 752
 753     return VLC_SUCCESS;
 754 }
 755
 756 static int xCallback( vlc_object_t *p_this, char const *psz_var,
 757                       vlc_value_t oldval, vlc_value_t newval,
 758                       void *p_data )
 759 {
 760     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 761     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 762     sout_stream_sys_t *p_sys = p_stream->p_sys;
 763
 764     if( p_sys->p_es )
 765         p_sys->p_es->i_x = newval.i_int;
 766
 767     return VLC_SUCCESS;
 768 }
 769
 770 static int yCallback( vlc_object_t *p_this, char const *psz_var,
 771                       vlc_value_t oldval, vlc_value_t newval,
 772                       void *p_data )
 773 {
 774     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 775     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 776     sout_stream_sys_t *p_sys = p_stream->p_sys;
 777
 778     if( p_sys->p_es )
 779         p_sys->p_es->i_y = newval.i_int;
 780
 781     return VLC_SUCCESS;
 782 }