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 <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
  43 #include "../video_filter/mosaic.h"
  44
  45 /*****************************************************************************
  46  * Local structures
  47  *****************************************************************************/
  48 struct sout_stream_sys_t
  49 {
  50     bridged_es_t *p_es;
  51     vlc_mutex_t *p_lock;
  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_t *Add ( sout_stream_t *, es_format_t * );
  77 static int               Del ( sout_stream_t *, sout_stream_id_t * );
  78 static int               Send( sout_stream_t *, sout_stream_id_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", NULL, ID_TEXT, ID_LONGTEXT,
 149                 false )
 150     add_integer( CFG_PREFIX "width", 0, NULL, WIDTH_TEXT,
 151                  WIDTH_LONGTEXT, true )
 152     add_integer( CFG_PREFIX "height", 0, NULL, HEIGHT_TEXT,
 153                  HEIGHT_LONGTEXT, true )
 154     add_string( CFG_PREFIX "sar", "1:1", NULL, RATIO_TEXT,
 155                 RATIO_LONGTEXT, false )
 156     add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 157                 false )
 158
 159     add_module_list( CFG_PREFIX "vfilter", "video filter2",
 160                      NULL, NULL, VFILTER_TEXT, VFILTER_LONGTEXT, false )
 161
 162     add_integer_with_range( CFG_PREFIX "alpha", 255, 0, 255, NULL,
 163                             ALPHA_TEXT, ALPHA_LONGTEXT, false )
 164     add_integer( CFG_PREFIX "x", -1, NULL, X_TEXT, X_LONGTEXT, false )
 165     add_integer( CFG_PREFIX "y", -1, NULL, 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_object_t         *p_libvlc = VLC_OBJECT( p_this->p_libvlc );
 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     var_Create( p_libvlc, "mosaic-lock", VLC_VAR_MUTEX );
 195     var_Get( p_libvlc, "mosaic-lock", &val );
 196     p_sys->p_lock = val.p_address;
 197
 198     p_sys->psz_id = var_CreateGetString( p_stream, CFG_PREFIX "id" );
 199
 200     p_sys->i_height =
 201         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "height" );
 202     var_AddCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 203
 204     p_sys->i_width =
 205         var_CreateGetIntegerCommand( p_stream, CFG_PREFIX "width" );
 206     var_AddCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 207
 208     var_Get( p_stream, CFG_PREFIX "sar", &val );
 209     if( val.psz_string )
 210     {
 211         char *psz_parser = strchr( val.psz_string, ':' );
 212
 213         if( psz_parser )
 214         {
 215             *psz_parser++ = '\0';
 216             p_sys->i_sar_num = atoi( val.psz_string );
 217             p_sys->i_sar_den = atoi( psz_parser );
 218             vlc_ureduce( &p_sys->i_sar_num, &p_sys->i_sar_den,
 219                          p_sys->i_sar_num, p_sys->i_sar_den, 0 );
 220         }
 221         else
 222         {
 223             msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
 224             p_sys->i_sar_num = p_sys->i_sar_den = 1;
 225         }
 226
 227         free( val.psz_string );
 228     }
 229     else
 230     {
 231         p_sys->i_sar_num = p_sys->i_sar_den = 1;
 232     }
 233
 234     p_sys->i_chroma = 0;
 235     val.psz_string = var_GetNonEmptyString( p_stream, CFG_PREFIX "chroma" );
 236     if( val.psz_string && strlen( val.psz_string ) >= 4 )
 237     {
 238         memcpy( &p_sys->i_chroma, val.psz_string, 4 );
 239         msg_Dbg( p_stream, "Forcing image chroma to 0x%.8x (%4.4s)", p_sys->i_chroma, (char*)&p_sys->i_chroma );
 240     }
 241     free( val.psz_string );
 242
 243 #define INT_COMMAND( a ) do { \
 244     var_Create( p_stream, CFG_PREFIX #a, \
 245                 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND ); \
 246     var_AddCallback( p_stream, CFG_PREFIX #a, a ## Callback, \
 247                      p_stream ); } while(0)
 248     INT_COMMAND( alpha );
 249     INT_COMMAND( x );
 250     INT_COMMAND( y );
 251
 252 #undef INT_COMMAND
 253
 254     p_stream->pf_add    = Add;
 255     p_stream->pf_del    = Del;
 256     p_stream->pf_send   = Send;
 257
 258     p_stream->p_sout->i_out_pace_nocontrol++;
 259
 260     return VLC_SUCCESS;
 261 }
 262
 263 /*****************************************************************************
 264  * Close
 265  *****************************************************************************/
 266 static void Close( vlc_object_t * p_this )
 267 {
 268     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 269     sout_stream_sys_t *p_sys = p_stream->p_sys;
 270
 271     /* Delete the callbacks */
 272     var_DelCallback( p_stream, CFG_PREFIX "height", HeightCallback, p_stream );
 273     var_DelCallback( p_stream, CFG_PREFIX "width", WidthCallback, p_stream );
 274     var_DelCallback( p_stream, CFG_PREFIX "alpha", alphaCallback, p_stream );
 275     var_DelCallback( p_stream, CFG_PREFIX "x", xCallback, p_stream );
 276     var_DelCallback( p_stream, CFG_PREFIX "y", yCallback, p_stream );
 277
 278     p_stream->p_sout->i_out_pace_nocontrol--;
 279
 280     free( p_sys->psz_id );
 281
 282     free( p_sys );
 283 }
 284
 285 static int video_filter_buffer_allocation_init( filter_t *p_filter, void *p_data )
 286 {
 287     p_filter->pf_video_buffer_new = video_new_buffer_filter;
 288     p_filter->pf_video_buffer_del = video_del_buffer_filter;
 289     p_filter->p_owner = p_data;
 290     return VLC_SUCCESS;
 291 }
 292
 293 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 294 {
 295     sout_stream_sys_t *p_sys = p_stream->p_sys;
 296     bridge_t *p_bridge;
 297     bridged_es_t *p_es;
 298     char *psz_chain;
 299     int i;
 300
 301     if( p_sys->b_inited || p_fmt->i_cat != VIDEO_ES )
 302         return NULL;
 303
 304     /* Create decoder object */
 305     p_sys->p_decoder = vlc_object_create( p_stream, sizeof( decoder_t ) );
 306     if( !p_sys->p_decoder )
 307         return NULL;
 308     vlc_object_attach( p_sys->p_decoder, p_stream );
 309     p_sys->p_decoder->p_module = NULL;
 310     p_sys->p_decoder->fmt_in = *p_fmt;
 311     p_sys->p_decoder->b_pace_control = false;
 312     p_sys->p_decoder->fmt_out = p_sys->p_decoder->fmt_in;
 313     p_sys->p_decoder->fmt_out.i_extra = 0;
 314     p_sys->p_decoder->fmt_out.p_extra = 0;
 315     p_sys->p_decoder->pf_decode_video = 0;
 316     p_sys->p_decoder->pf_vout_buffer_new = video_new_buffer_decoder;
 317     p_sys->p_decoder->pf_vout_buffer_del = video_del_buffer_decoder;
 318     p_sys->p_decoder->pf_picture_link    = video_link_picture_decoder;
 319     p_sys->p_decoder->pf_picture_unlink  = video_unlink_picture_decoder;
 320     p_sys->p_decoder->p_owner = malloc( sizeof(decoder_owner_sys_t) );
 321     if( !p_sys->p_decoder->p_owner )
 322     {
 323         vlc_object_release( p_sys->p_decoder );
 324         return NULL;
 325     }
 326
 327     p_sys->p_decoder->p_owner->video = p_fmt->video;
 328     //p_sys->p_decoder->p_cfg = p_sys->p_video_cfg;
 329
 330     p_sys->p_decoder->p_module =
 331         module_need( p_sys->p_decoder, "decoder", "$codec", false );
 332
 333     if( !p_sys->p_decoder->p_module || !p_sys->p_decoder->pf_decode_video )
 334     {
 335         if( p_sys->p_decoder->p_module )
 336         {
 337             msg_Err( p_stream, "instanciated a non video decoder" );
 338             module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 339         }
 340         else
 341         {
 342             msg_Err( p_stream, "cannot find decoder" );
 343         }
 344         free( p_sys->p_decoder->p_owner );
 345         vlc_object_release( p_sys->p_decoder );
 346         return NULL;
 347     }
 348
 349     p_sys->b_inited = true;
 350     vlc_mutex_lock( p_sys->p_lock );
 351
 352     p_bridge = GetBridge( p_stream );
 353     if ( p_bridge == NULL )
 354     {
 355         vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
 356         vlc_value_t val;
 357
 358         p_bridge = xmalloc( sizeof( bridge_t ) );
 359
 360         var_Create( p_libvlc, "mosaic-struct", VLC_VAR_ADDRESS );
 361         val.p_address = p_bridge;
 362         var_Set( p_libvlc, "mosaic-struct", val );
 363
 364         p_bridge->i_es_num = 0;
 365         p_bridge->pp_es = NULL;
 366     }
 367
 368     for ( i = 0; i < p_bridge->i_es_num; i++ )
 369     {
 370         if ( p_bridge->pp_es[i]->b_empty )
 371             break;
 372     }
 373
 374     if ( i == p_bridge->i_es_num )
 375     {
 376         p_bridge->pp_es = xrealloc( p_bridge->pp_es,
 377                           (p_bridge->i_es_num + 1) * sizeof(bridged_es_t *) );
 378         p_bridge->i_es_num++;
 379         p_bridge->pp_es[i] = xmalloc( sizeof(bridged_es_t) );
 380     }
 381
 382     p_sys->p_es = p_es = p_bridge->pp_es[i];
 383
 384     p_es->i_alpha = var_GetInteger( p_stream, CFG_PREFIX "alpha" );
 385     p_es->i_x = var_GetInteger( p_stream, CFG_PREFIX "x" );
 386     p_es->i_y = var_GetInteger( p_stream, CFG_PREFIX "y" );
 387
 388     //p_es->fmt = *p_fmt;
 389     p_es->psz_id = p_sys->psz_id;
 390     p_es->p_picture = NULL;
 391     p_es->pp_last = &p_es->p_picture;
 392     p_es->b_empty = false;
 393
 394     vlc_mutex_unlock( p_sys->p_lock );
 395
 396     if ( p_sys->i_height || p_sys->i_width )
 397     {
 398         p_sys->p_image = image_HandlerCreate( p_stream );
 399     }
 400     else
 401     {
 402         p_sys->p_image = NULL;
 403     }
 404
 405     msg_Dbg( p_stream, "mosaic bridge id=%s pos=%d", p_es->psz_id, i );
 406
 407     /* Create user specified video filters */
 408     psz_chain = var_GetNonEmptyString( p_stream, CFG_PREFIX "vfilter" );
 409     msg_Dbg( p_stream, "psz_chain: %s", psz_chain );
 410     if( psz_chain )
 411     {
 412         p_sys->p_vf2 = filter_chain_New( p_stream, "video filter2", false,
 413                                          video_filter_buffer_allocation_init,
 414                                          NULL, p_sys->p_decoder->p_owner );
 415         es_format_t fmt;
 416         es_format_Copy( &fmt, &p_sys->p_decoder->fmt_out );
 417         if( p_sys->i_chroma )
 418             fmt.video.i_chroma = p_sys->i_chroma;
 419         filter_chain_Reset( p_sys->p_vf2, &fmt, &fmt );
 420         filter_chain_AppendFromString( p_sys->p_vf2, psz_chain );
 421         free( psz_chain );
 422     }
 423     else
 424     {
 425         p_sys->p_vf2 = NULL;
 426     }
 427
 428     return (sout_stream_id_t *)p_sys;
 429 }
 430
 431 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
 432 {
 433     VLC_UNUSED(id);
 434     sout_stream_sys_t *p_sys = p_stream->p_sys;
 435     bridge_t *p_bridge;
 436     bridged_es_t *p_es;
 437     bool b_last_es = true;
 438     int i;
 439
 440     if( !p_sys->b_inited )
 441         return VLC_SUCCESS;
 442
 443     if( p_sys->p_decoder != NULL )
 444     {
 445         decoder_owner_sys_t *p_owner = p_sys->p_decoder->p_owner;
 446
 447         if( p_sys->p_decoder->p_module )
 448             module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
 449         if( p_sys->p_decoder->p_description )
 450             vlc_meta_Delete( p_sys->p_decoder->p_description );
 451
 452         vlc_object_release( p_sys->p_decoder );
 453
 454         free( p_owner );
 455     }
 456
 457     /* Destroy user specified video filters */
 458     if( p_sys->p_vf2 )
 459         filter_chain_Delete( p_sys->p_vf2 );
 460
 461     vlc_mutex_lock( p_sys->p_lock );
 462
 463     p_bridge = GetBridge( p_stream );
 464     p_es = p_sys->p_es;
 465
 466     p_es->b_empty = true;
 467     while ( p_es->p_picture )
 468     {
 469         picture_t *p_next = p_es->p_picture->p_next;
 470         picture_Release( p_es->p_picture );
 471         p_es->p_picture = p_next;
 472     }
 473
 474     for ( i = 0; i < p_bridge->i_es_num; i++ )
 475     {
 476         if ( !p_bridge->pp_es[i]->b_empty )
 477         {
 478             b_last_es = false;
 479             break;
 480         }
 481     }
 482
 483     if ( b_last_es )
 484     {
 485         vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
 486         for ( i = 0; i < p_bridge->i_es_num; i++ )
 487             free( p_bridge->pp_es[i] );
 488         free( p_bridge->pp_es );
 489         free( p_bridge );
 490         var_Destroy( p_libvlc, "mosaic-struct" );
 491     }
 492
 493     vlc_mutex_unlock( p_sys->p_lock );
 494
 495     if ( p_sys->p_image )
 496     {
 497         image_HandlerDelete( p_sys->p_image );
 498     }
 499
 500     p_sys->b_inited = false;
 501
 502     return VLC_SUCCESS;
 503 }
 504
 505 /*****************************************************************************
 506  * PushPicture : push a picture in the mosaic-struct structure
 507  *****************************************************************************/
 508 static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
 509 {
 510     sout_stream_sys_t *p_sys = p_stream->p_sys;
 511     bridged_es_t *p_es = p_sys->p_es;
 512
 513     vlc_mutex_lock( p_sys->p_lock );
 514
 515     *p_es->pp_last = p_picture;
 516     p_picture->p_next = NULL;
 517     p_es->pp_last = &p_picture->p_next;
 518
 519     vlc_mutex_unlock( p_sys->p_lock );
 520 }
 521
 522 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 523                  block_t *p_buffer )
 524 {
 525     sout_stream_sys_t *p_sys = p_stream->p_sys;
 526     picture_t *p_pic;
 527
 528     if ( (sout_stream_sys_t *)id != p_sys )
 529     {
 530         block_ChainRelease( p_buffer );
 531         return VLC_SUCCESS;
 532     }
 533
 534     while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
 535                                                         &p_buffer )) )
 536     {
 537         picture_t *p_new_pic;
 538
 539         if( p_sys->i_height || p_sys->i_width )
 540         {
 541             video_format_t fmt_out, fmt_in;
 542
 543             memset( &fmt_in, 0, sizeof(video_format_t) );
 544             memset( &fmt_out, 0, sizeof(video_format_t) );
 545             fmt_in = p_sys->p_decoder->fmt_out.video;
 546
 547
 548             if( p_sys->i_chroma )
 549                 fmt_out.i_chroma = p_sys->i_chroma;
 550             else
 551                 fmt_out.i_chroma = VLC_CODEC_I420;
 552
 553             const unsigned i_fmt_in_aspect =
 554                 (int64_t)VOUT_ASPECT_FACTOR *
 555                 fmt_in.i_sar_num * fmt_in.i_width /
 556                 (fmt_in.i_sar_den * fmt_in.i_height);
 557             if ( !p_sys->i_height )
 558             {
 559                 fmt_out.i_width = p_sys->i_width;
 560                 fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
 561                     * p_sys->i_sar_num / p_sys->i_sar_den / i_fmt_in_aspect)
 562                       & ~0x1;
 563             }
 564             else if ( !p_sys->i_width )
 565             {
 566                 fmt_out.i_height = p_sys->i_height;
 567                 fmt_out.i_width = (p_sys->i_height * i_fmt_in_aspect
 568                     * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
 569                       & ~0x1;
 570             }
 571             else
 572             {
 573                 fmt_out.i_width = p_sys->i_width;
 574                 fmt_out.i_height = p_sys->i_height;
 575             }
 576             fmt_out.i_visible_width = fmt_out.i_width;
 577             fmt_out.i_visible_height = fmt_out.i_height;
 578
 579             p_new_pic = image_Convert( p_sys->p_image,
 580                                        p_pic, &fmt_in, &fmt_out );
 581             if( p_new_pic == NULL )
 582             {
 583                 msg_Err( p_stream, "image conversion failed" );
 584                 picture_Release( p_pic );
 585                 continue;
 586             }
 587         }
 588         else
 589         {
 590             /* TODO: chroma conversion if needed */
 591
 592             p_new_pic = picture_New( p_pic->format.i_chroma,
 593                                      p_pic->format.i_width, p_pic->format.i_height,
 594                                      p_sys->p_decoder->fmt_out.video.i_sar_num,
 595                                      p_sys->p_decoder->fmt_out.video.i_sar_den );
 596             if( !p_new_pic )
 597             {
 598                 picture_Release( p_pic );
 599                 msg_Err( p_stream, "image allocation failed" );
 600                 continue;
 601             }
 602
 603             picture_Copy( p_new_pic, p_pic );
 604         }
 605         picture_Release( p_pic );
 606
 607         if( p_sys->p_vf2 )
 608             p_new_pic = filter_chain_VideoFilter( p_sys->p_vf2, p_new_pic );
 609
 610         PushPicture( p_stream, p_new_pic );
 611     }
 612
 613     return VLC_SUCCESS;
 614 }
 615
 616 inline static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
 617 {
 618     return video_new_buffer( VLC_OBJECT( p_dec ),
 619                              (decoder_owner_sys_t *)p_dec->p_owner,
 620                              &p_dec->fmt_out );
 621 }
 622
 623 inline static picture_t *video_new_buffer_filter( filter_t *p_filter )
 624 {
 625     return video_new_buffer( VLC_OBJECT( p_filter ),
 626                              (decoder_owner_sys_t *)p_filter->p_owner,
 627                              &p_filter->fmt_out );
 628 }
 629
 630 static picture_t *video_new_buffer( 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
 660     return picture_NewFromFormat( &fmt_out->video );
 661 }
 662
 663 inline static void video_del_buffer_decoder( decoder_t *p_this,
 664                                              picture_t *p_pic )
 665 {
 666     VLC_UNUSED(p_this);
 667     picture_Release( p_pic );
 668 }
 669
 670 inline static void video_del_buffer_filter( filter_t *p_this,
 671                                             picture_t *p_pic )
 672 {
 673     VLC_UNUSED(p_this);
 674     picture_Release( p_pic );
 675 }
 676
 677 static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 678 {
 679     VLC_UNUSED(p_dec);
 680     picture_Hold( p_pic );
 681 }
 682
 683 static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
 684 {
 685     VLC_UNUSED(p_dec);
 686     picture_Release( p_pic );
 687 }
 688
 689
 690 /**********************************************************************
 691  * Callback to update (some) params on the fly
 692  **********************************************************************/
 693 static int HeightCallback( vlc_object_t *p_this, char const *psz_var,
 694                            vlc_value_t oldval, vlc_value_t newval,
 695                            void *p_data )
 696 {
 697     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 698     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 699     sout_stream_sys_t *p_sys = p_stream->p_sys;
 700
 701     /* We create the handler before updating the value in p_sys
 702      * so we don't have to worry about locking */
 703     if( !p_sys->p_image && newval.i_int )
 704         p_sys->p_image = image_HandlerCreate( p_stream );
 705     p_sys->i_height = newval.i_int;
 706
 707     return VLC_SUCCESS;
 708 }
 709
 710 static int WidthCallback( vlc_object_t *p_this, char const *psz_var,
 711                            vlc_value_t oldval, vlc_value_t newval,
 712                            void *p_data )
 713 {
 714     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 715     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 716     sout_stream_sys_t *p_sys = p_stream->p_sys;
 717
 718     /* We create the handler before updating the value in p_sys
 719      * so we don't have to worry about locking */
 720     if( !p_sys->p_image && newval.i_int )
 721         p_sys->p_image = image_HandlerCreate( p_stream );
 722     p_sys->i_width = newval.i_int;
 723
 724     return VLC_SUCCESS;
 725 }
 726
 727 static int alphaCallback( vlc_object_t *p_this, char const *psz_var,
 728                           vlc_value_t oldval, vlc_value_t newval,
 729                           void *p_data )
 730 {
 731     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 732     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 733     sout_stream_sys_t *p_sys = p_stream->p_sys;
 734
 735     if( p_sys->p_es )
 736         p_sys->p_es->i_alpha = newval.i_int;
 737
 738     return VLC_SUCCESS;
 739 }
 740
 741 static int xCallback( vlc_object_t *p_this, char const *psz_var,
 742                       vlc_value_t oldval, vlc_value_t newval,
 743                       void *p_data )
 744 {
 745     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 746     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 747     sout_stream_sys_t *p_sys = p_stream->p_sys;
 748
 749     if( p_sys->p_es )
 750         p_sys->p_es->i_x = newval.i_int;
 751
 752     return VLC_SUCCESS;
 753 }
 754
 755 static int yCallback( vlc_object_t *p_this, char const *psz_var,
 756                       vlc_value_t oldval, vlc_value_t newval,
 757                       void *p_data )
 758 {
 759     VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
 760     sout_stream_t *p_stream = (sout_stream_t *)p_data;
 761     sout_stream_sys_t *p_sys = p_stream->p_sys;
 762
 763     if( p_sys->p_es )
 764         p_sys->p_es->i_y = newval.i_int;
 765
 766     return VLC_SUCCESS;
 767 }