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