git.sesse.net Git - vlc/blob - src/video_output/vout_subpictures.c

   1 /*****************************************************************************
   2  * vout_subpictures.c : subpicture management functions
   3  *****************************************************************************
   4  * Copyright (C) 2000-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
   8  *          Samuel Hocevar <sam@zoy.org>
   9  *          Gildas Bazin <gbazin@videolan.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <stdlib.h>                                                /* free() */
  30 #include <stdio.h>                                              /* sprintf() */
  31 #include <string.h>                                            /* strerror() */
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc_vout.h>
  35 #include <vlc_block.h>
  36 #include <vlc_filter.h>
  37 #include <vlc_osd.h>
  38
  39 /*****************************************************************************
  40  * Local prototypes
  41  *****************************************************************************/
  42 static void UpdateSPU   ( spu_t *, vlc_object_t * );
  43 static int  CropCallback( vlc_object_t *, char const *,
  44                           vlc_value_t, vlc_value_t, void * );
  45
  46 static int spu_vaControlDefault( spu_t *, int, va_list );
  47
  48 static subpicture_t *sub_new_buffer( filter_t * );
  49 static void sub_del_buffer( filter_t *, subpicture_t * );
  50 static subpicture_t *spu_new_buffer( filter_t * );
  51 static void spu_del_buffer( filter_t *, subpicture_t * );
  52 static picture_t *spu_new_video_buffer( filter_t * );
  53 static void spu_del_video_buffer( filter_t *, picture_t * );
  54
  55 static int spu_ParseChain( spu_t * );
  56 static void spu_DeleteChain( spu_t * );
  57 static int SubFilterCallback( vlc_object_t *, char const *,
  58                               vlc_value_t, vlc_value_t, void * );
  59
  60 struct filter_owner_sys_t
  61 {
  62     spu_t *p_spu;
  63     int i_channel;
  64 };
  65
  66 /**
  67  * Creates the subpicture unit
  68  *
  69  * \param p_this the parent object which creates the subpicture unit
  70  */
  71 spu_t *__spu_Create( vlc_object_t *p_this )
  72 {
  73     int i_index;
  74     spu_t *p_spu = vlc_object_create( p_this, VLC_OBJECT_SPU );
  75
  76     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
  77     {
  78         p_spu->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
  79     }
  80
  81     p_spu->p_blend = NULL;
  82     p_spu->p_text = NULL;
  83     p_spu->p_scale = NULL;
  84     p_spu->i_filter = 0;
  85     p_spu->pf_control = spu_vaControlDefault;
  86
  87     /* Register the default subpicture channel */
  88     p_spu->i_channel = 2;
  89
  90     vlc_mutex_init( p_this, &p_spu->subpicture_lock );
  91
  92     vlc_object_attach( p_spu, p_this );
  93
  94     return p_spu;
  95 }
  96
  97 /**
  98  * Initialise the subpicture unit
  99  *
 100  * \param p_spu the subpicture unit object
 101  */
 102 int spu_Init( spu_t *p_spu )
 103 {
 104     vlc_value_t val;
 105
 106     /* If the user requested a sub margin, we force the position. */
 107     var_Create( p_spu, "sub-margin", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 108     var_Get( p_spu, "sub-margin", &val );
 109     p_spu->i_margin = val.i_int;
 110
 111     var_Create( p_spu, "sub-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 112     var_AddCallback( p_spu, "sub-filter", SubFilterCallback, p_spu );
 113
 114     spu_ParseChain( p_spu );
 115
 116     return VLC_EGENERIC;
 117 }
 118
 119 int spu_ParseChain( spu_t *p_spu )
 120 {
 121     char *psz_parser;
 122     vlc_value_t val;
 123     var_Get( p_spu, "sub-filter", &val );
 124     psz_parser = val.psz_string;
 125
 126     while( psz_parser && *psz_parser )
 127     {
 128         config_chain_t *p_cfg;
 129         char *psz_name;
 130
 131         psz_parser = config_ChainCreate( &psz_name, &p_cfg, psz_parser );
 132
 133         msg_Dbg( p_spu, "adding sub-filter: %s", psz_name );
 134
 135         p_spu->pp_filter[p_spu->i_filter] =
 136             vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 137         vlc_object_attach( p_spu->pp_filter[p_spu->i_filter], p_spu );
 138         p_spu->pp_filter[p_spu->i_filter]->pf_sub_buffer_new = sub_new_buffer;
 139         p_spu->pp_filter[p_spu->i_filter]->pf_sub_buffer_del = sub_del_buffer;
 140         p_spu->pp_filter[p_spu->i_filter]->p_cfg = p_cfg;
 141         p_spu->pp_filter[p_spu->i_filter]->p_module =
 142             module_Need( p_spu->pp_filter[p_spu->i_filter],
 143                          "sub filter", psz_name, VLC_TRUE );
 144         if( p_spu->pp_filter[p_spu->i_filter]->p_module )
 145         {
 146             filter_owner_sys_t *p_sys = malloc( sizeof(filter_owner_sys_t) );
 147             p_spu->pp_filter[p_spu->i_filter]->p_owner = p_sys;
 148             spu_Control( p_spu, SPU_CHANNEL_REGISTER, &p_sys->i_channel );
 149             p_sys->p_spu = p_spu;
 150             p_spu->i_filter++;
 151         }
 152         else
 153         {
 154             msg_Dbg( p_spu, "no sub filter found" );
 155             config_ChainDestroy( p_spu->pp_filter[p_spu->i_filter]->p_cfg );
 156             vlc_object_detach( p_spu->pp_filter[p_spu->i_filter] );
 157             vlc_object_destroy( p_spu->pp_filter[p_spu->i_filter] );
 158         }
 159
 160         if( p_spu->i_filter >= 10 )
 161         {
 162             msg_Dbg( p_spu, "can't add anymore filters" );
 163         }
 164
 165         free( psz_name );
 166     }
 167     if( val.psz_string ) free( val.psz_string );
 168
 169     return VLC_EGENERIC;
 170 }
 171
 172 /**
 173  * Destroy the subpicture unit
 174  *
 175  * \param p_this the parent object which destroys the subpicture unit
 176  */
 177 void spu_Destroy( spu_t *p_spu )
 178 {
 179     int i_index;
 180
 181     vlc_object_detach( p_spu );
 182
 183     /* Destroy all remaining subpictures */
 184     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
 185     {
 186         if( p_spu->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
 187         {
 188             spu_DestroySubpicture( p_spu, &p_spu->p_subpicture[i_index] );
 189         }
 190     }
 191
 192     if( p_spu->p_blend )
 193     {
 194         if( p_spu->p_blend->p_module )
 195             module_Unneed( p_spu->p_blend, p_spu->p_blend->p_module );
 196
 197         vlc_object_detach( p_spu->p_blend );
 198         vlc_object_destroy( p_spu->p_blend );
 199     }
 200
 201     if( p_spu->p_text )
 202     {
 203         if( p_spu->p_text->p_module )
 204             module_Unneed( p_spu->p_text, p_spu->p_text->p_module );
 205
 206         vlc_object_detach( p_spu->p_text );
 207         vlc_object_destroy( p_spu->p_text );
 208     }
 209
 210     if( p_spu->p_scale )
 211     {
 212         if( p_spu->p_scale->p_module )
 213             module_Unneed( p_spu->p_scale, p_spu->p_scale->p_module );
 214
 215         vlc_object_detach( p_spu->p_scale );
 216         vlc_object_destroy( p_spu->p_scale );
 217     }
 218
 219     spu_DeleteChain( p_spu );
 220
 221     vlc_mutex_destroy( &p_spu->subpicture_lock );
 222     vlc_object_destroy( p_spu );
 223 }
 224
 225 static void spu_DeleteChain( spu_t *p_spu )
 226 {
 227     if( p_spu->i_filter )
 228     while( p_spu->i_filter-- )
 229     {
 230         module_Unneed( p_spu->pp_filter[p_spu->i_filter],
 231                        p_spu->pp_filter[p_spu->i_filter]->p_module );
 232         free( p_spu->pp_filter[p_spu->i_filter]->p_owner );
 233         config_ChainDestroy( p_spu->pp_filter[p_spu->i_filter]->p_cfg );
 234         vlc_object_detach( p_spu->pp_filter[p_spu->i_filter] );
 235         vlc_object_destroy( p_spu->pp_filter[p_spu->i_filter] );
 236     }
 237 }
 238
 239 /**
 240  * Attach/Detach the SPU from any input
 241  *
 242  * \param p_this the object in which to destroy the subpicture unit
 243  * \param b_attach to select attach or detach
 244  */
 245 void spu_Attach( spu_t *p_spu, vlc_object_t *p_this, vlc_bool_t b_attach )
 246 {
 247     vlc_object_t *p_input;
 248
 249     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 250     if( !p_input ) return;
 251
 252     if( b_attach )
 253     {
 254         UpdateSPU( p_spu, VLC_OBJECT(p_input) );
 255         var_AddCallback( p_input, "highlight", CropCallback, p_spu );
 256         vlc_object_release( p_input );
 257     }
 258     else
 259     {
 260         /* Delete callback */
 261         var_DelCallback( p_input, "highlight", CropCallback, p_spu );
 262         vlc_object_release( p_input );
 263     }
 264 }
 265
 266 /**
 267  * Create a subpicture region
 268  *
 269  * \param p_this vlc_object_t
 270  * \param p_fmt the format that this subpicture region should have
 271  */
 272 static void RegionPictureRelease( picture_t *p_pic )
 273 {
 274     if( p_pic->p_data_orig ) free( p_pic->p_data_orig );
 275 }
 276 subpicture_region_t *__spu_CreateRegion( vlc_object_t *p_this,
 277                                          video_format_t *p_fmt )
 278 {
 279     subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
 280     memset( p_region, 0, sizeof(subpicture_region_t) );
 281     p_region->p_next = 0;
 282     p_region->p_cache = 0;
 283     p_region->fmt = *p_fmt;
 284     p_region->psz_text = 0;
 285     p_region->p_style = NULL;
 286
 287     if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
 288         p_fmt->p_palette = p_region->fmt.p_palette =
 289             malloc( sizeof(video_palette_t) );
 290     else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
 291
 292     p_region->picture.p_data_orig = NULL;
 293
 294     if( p_fmt->i_chroma == VLC_FOURCC('T','E','X','T') ) return p_region;
 295
 296     vout_AllocatePicture( p_this, &p_region->picture, p_fmt->i_chroma,
 297                           p_fmt->i_width, p_fmt->i_height, p_fmt->i_aspect );
 298
 299     if( !p_region->picture.i_planes )
 300     {
 301         free( p_region );
 302         free( p_fmt->p_palette );
 303         return NULL;
 304     }
 305
 306     p_region->picture.pf_release = RegionPictureRelease;
 307
 308     return p_region;
 309 }
 310
 311 /**
 312  * Make a subpicture region from an existing picture_t
 313  *
 314  * \param p_this vlc_object_t
 315  * \param p_fmt the format that this subpicture region should have
 316  * \param p_pic a pointer to the picture creating the region (not freed)
 317  */
 318 subpicture_region_t *__spu_MakeRegion( vlc_object_t *p_this,
 319                                        video_format_t *p_fmt,
 320                                        picture_t *p_pic )
 321 {
 322     subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
 323     (void)p_this;
 324     memset( p_region, 0, sizeof(subpicture_region_t) );
 325     p_region->p_next = 0;
 326     p_region->p_cache = 0;
 327     p_region->fmt = *p_fmt;
 328     p_region->psz_text = 0;
 329     p_region->p_style = NULL;
 330
 331     if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
 332         p_fmt->p_palette = p_region->fmt.p_palette =
 333             malloc( sizeof(video_palette_t) );
 334     else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
 335
 336     memcpy( &p_region->picture, p_pic, sizeof(picture_t) );
 337     p_region->picture.pf_release = RegionPictureRelease;
 338
 339     return p_region;
 340 }
 341
 342 /**
 343  * Destroy a subpicture region
 344  *
 345  * \param p_this vlc_object_t
 346  * \param p_region the subpicture region to destroy
 347  */
 348 void __spu_DestroyRegion( vlc_object_t *p_this, subpicture_region_t *p_region )
 349 {
 350     if( !p_region ) return;
 351     if( p_region->picture.pf_release )
 352         p_region->picture.pf_release( &p_region->picture );
 353     if( p_region->fmt.p_palette ) free( p_region->fmt.p_palette );
 354     if( p_region->p_cache ) __spu_DestroyRegion( p_this, p_region->p_cache );
 355
 356     if( p_region->psz_text )
 357         free( p_region->psz_text );
 358     if( p_region->psz_html )
 359         free( p_region->psz_html );
 360     //free( p_region->p_style ); FIXME --fenrir plugin does not allocate the memory for it. I think it might lead to segfault, video renderer can live longer than the decoder
 361     free( p_region );
 362 }
 363
 364 /**
 365  * Display a subpicture
 366  *
 367  * Remove the reservation flag of a subpicture, which will cause it to be
 368  * ready for display.
 369  * \param p_spu the subpicture unit object
 370  * \param p_subpic the subpicture to display
 371  */
 372 void spu_DisplaySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
 373 {
 374     /* Check if status is valid */
 375     if( p_subpic->i_status != RESERVED_SUBPICTURE )
 376     {
 377         msg_Err( p_spu, "subpicture %p has invalid status #%d",
 378                  p_subpic, p_subpic->i_status );
 379     }
 380
 381     /* Remove reservation flag */
 382     p_subpic->i_status = READY_SUBPICTURE;
 383
 384     if( p_subpic->i_channel == DEFAULT_CHAN )
 385     {
 386         p_subpic->i_channel = 0xFFFF;
 387         spu_Control( p_spu, SPU_CHANNEL_CLEAR, DEFAULT_CHAN );
 388         p_subpic->i_channel = DEFAULT_CHAN;
 389     }
 390 }
 391
 392 /**
 393  * Allocate a subpicture in the spu heap.
 394  *
 395  * This function create a reserved subpicture in the spu heap.
 396  * A null pointer is returned if the function fails. This method provides an
 397  * already allocated zone of memory in the spu data fields. It needs locking
 398  * since several pictures can be created by several producers threads.
 399  * \param p_spu the subpicture unit in which to create the subpicture
 400  * \return NULL on error, a reserved subpicture otherwise
 401  */
 402 subpicture_t *spu_CreateSubpicture( spu_t *p_spu )
 403 {
 404     int                 i_subpic;                        /* subpicture index */
 405     subpicture_t *      p_subpic = NULL;            /* first free subpicture */
 406
 407     /* Get lock */
 408     vlc_mutex_lock( &p_spu->subpicture_lock );
 409
 410     /*
 411      * Look for an empty place
 412      */
 413     p_subpic = NULL;
 414     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 415     {
 416         if( p_spu->p_subpicture[i_subpic].i_status == FREE_SUBPICTURE )
 417         {
 418             /* Subpicture is empty and ready for allocation */
 419             p_subpic = &p_spu->p_subpicture[i_subpic];
 420             p_spu->p_subpicture[i_subpic].i_status = RESERVED_SUBPICTURE;
 421             break;
 422         }
 423     }
 424
 425     /* If no free subpicture could be found */
 426     if( p_subpic == NULL )
 427     {
 428         msg_Err( p_spu, "subpicture heap is full" );
 429         vlc_mutex_unlock( &p_spu->subpicture_lock );
 430         return NULL;
 431     }
 432
 433     /* Copy subpicture information, set some default values */
 434     memset( p_subpic, 0, sizeof(subpicture_t) );
 435     p_subpic->i_status   = RESERVED_SUBPICTURE;
 436     p_subpic->b_absolute = VLC_TRUE;
 437     p_subpic->b_pausable = VLC_FALSE;
 438     p_subpic->b_fade     = VLC_FALSE;
 439     p_subpic->i_alpha    = 0xFF;
 440     p_subpic->p_region   = 0;
 441     p_subpic->pf_render  = 0;
 442     p_subpic->pf_destroy = 0;
 443     p_subpic->p_sys      = 0;
 444     vlc_mutex_unlock( &p_spu->subpicture_lock );
 445
 446     p_subpic->pf_create_region = __spu_CreateRegion;
 447     p_subpic->pf_make_region = __spu_MakeRegion;
 448     p_subpic->pf_destroy_region = __spu_DestroyRegion;
 449
 450     return p_subpic;
 451 }
 452
 453 /**
 454  * Remove a subpicture from the heap
 455  *
 456  * This function frees a previously reserved subpicture.
 457  * It is meant to be used when the construction of a picture aborted.
 458  * This function does not need locking since reserved subpictures are ignored
 459  * by the spu.
 460  */
 461 void spu_DestroySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
 462 {
 463     /* Get lock */
 464     vlc_mutex_lock( &p_spu->subpicture_lock );
 465
 466     /* There can be race conditions so we need to check the status */
 467     if( p_subpic->i_status == FREE_SUBPICTURE )
 468     {
 469         vlc_mutex_unlock( &p_spu->subpicture_lock );
 470         return;
 471     }
 472
 473     /* Check if status is valid */
 474     if( ( p_subpic->i_status != RESERVED_SUBPICTURE )
 475            && ( p_subpic->i_status != READY_SUBPICTURE ) )
 476     {
 477         msg_Err( p_spu, "subpicture %p has invalid status %d",
 478                          p_subpic, p_subpic->i_status );
 479     }
 480
 481     while( p_subpic->p_region )
 482     {
 483         subpicture_region_t *p_region = p_subpic->p_region;
 484         p_subpic->p_region = p_region->p_next;
 485         spu_DestroyRegion( p_spu, p_region );
 486     }
 487
 488     if( p_subpic->pf_destroy )
 489     {
 490         p_subpic->pf_destroy( p_subpic );
 491     }
 492
 493     p_subpic->i_status = FREE_SUBPICTURE;
 494
 495     vlc_mutex_unlock( &p_spu->subpicture_lock );
 496 }
 497
 498 /*****************************************************************************
 499  * spu_RenderSubpictures: render a subpicture list
 500  *****************************************************************************
 501  * This function renders all sub picture units in the list.
 502  *****************************************************************************/
 503 void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
 504                             picture_t *p_pic_dst, picture_t *p_pic_src,
 505                             subpicture_t *p_subpic,
 506                             int i_scale_width_orig, int i_scale_height_orig )
 507 {
 508     /* Get lock */
 509     vlc_mutex_lock( &p_spu->subpicture_lock );
 510
 511     /* Check i_status again to make sure spudec hasn't destroyed the subpic */
 512     while( p_subpic != NULL && p_subpic->i_status != FREE_SUBPICTURE )
 513     {
 514         subpicture_region_t *p_region = p_subpic->p_region;
 515         int i_scale_width, i_scale_height;
 516         int i_subpic_x = p_subpic->i_x;
 517
 518         /* Load the blending module */
 519         if( !p_spu->p_blend && p_region )
 520         {
 521             p_spu->p_blend = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 522             vlc_object_attach( p_spu->p_blend, p_spu );
 523             p_spu->p_blend->fmt_out.video.i_x_offset =
 524                 p_spu->p_blend->fmt_out.video.i_y_offset = 0;
 525             p_spu->p_blend->fmt_out.video.i_aspect = p_fmt->i_aspect;
 526             p_spu->p_blend->fmt_out.video.i_chroma = p_fmt->i_chroma;
 527             p_spu->p_blend->fmt_in.video.i_chroma = VLC_FOURCC('Y','U','V','P');
 528             /* XXX: We'll also be using it for YUVA and RGBA blending ... */
 529
 530             p_spu->p_blend->p_module =
 531                 module_Need( p_spu->p_blend, "video blending", 0, 0 );
 532         }
 533
 534         /* Load the text rendering module */
 535         if( !p_spu->p_text && p_region && p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
 536         {
 537             char *psz_modulename = NULL;
 538
 539             p_spu->p_text = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 540             vlc_object_attach( p_spu->p_text, p_spu );
 541
 542             p_spu->p_text->fmt_out.video.i_width =
 543                 p_spu->p_text->fmt_out.video.i_visible_width =
 544                 p_fmt->i_width;
 545             p_spu->p_text->fmt_out.video.i_height =
 546                 p_spu->p_text->fmt_out.video.i_visible_height =
 547                 p_fmt->i_height;
 548
 549             p_spu->p_text->pf_sub_buffer_new = spu_new_buffer;
 550             p_spu->p_text->pf_sub_buffer_del = spu_del_buffer;
 551
 552             psz_modulename = var_CreateGetString( p_spu, "text-renderer" );
 553             if( psz_modulename && *psz_modulename )
 554             {
 555                 p_spu->p_text->p_module =
 556                     module_Need( p_spu->p_text, "text renderer",
 557                                  psz_modulename, VLC_TRUE );
 558             }
 559             if( !p_spu->p_text->p_module )
 560             {
 561                 p_spu->p_text->p_module =
 562                     module_Need( p_spu->p_text, "text renderer", 0, 0 );
 563             }
 564             if( psz_modulename ) free( psz_modulename );
 565         }
 566         if( p_spu->p_text )
 567         {
 568             if( p_subpic->i_original_picture_height > 0 &&
 569                 p_subpic->i_original_picture_width  > 0 )
 570             {
 571                 p_spu->p_text->fmt_out.video.i_width =
 572                     p_spu->p_text->fmt_out.video.i_visible_width =
 573                     p_subpic->i_original_picture_width;
 574                 p_spu->p_text->fmt_out.video.i_height =
 575                     p_spu->p_text->fmt_out.video.i_visible_height =
 576                     p_subpic->i_original_picture_height;
 577             }
 578             else
 579             {
 580                 p_spu->p_text->fmt_out.video.i_width =
 581                     p_spu->p_text->fmt_out.video.i_visible_width =
 582                     p_fmt->i_width;
 583                 p_spu->p_text->fmt_out.video.i_height =
 584                     p_spu->p_text->fmt_out.video.i_visible_height =
 585                     p_fmt->i_height;
 586             }
 587         }
 588
 589         i_scale_width = i_scale_width_orig;
 590         i_scale_height = i_scale_height_orig;
 591
 592         if( p_subpic->i_original_picture_height > 0 &&
 593             p_subpic->i_original_picture_width  > 0 )
 594         {
 595             i_scale_width = i_scale_width * p_fmt->i_width /
 596                              p_subpic->i_original_picture_width;
 597             i_scale_height = i_scale_height * p_fmt->i_height /
 598                              p_subpic->i_original_picture_height;
 599         }
 600         else if( p_subpic->i_original_picture_height > 0 )
 601         {
 602             i_scale_height = i_scale_height * p_fmt->i_height /
 603                              p_subpic->i_original_picture_height;
 604             i_scale_width = i_scale_height * i_scale_height / p_fmt->i_height;
 605         }
 606
 607         /* Set default subpicture aspect ratio */
 608         if( p_region && p_region->fmt.i_aspect &&
 609             (!p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den) )
 610         {
 611             p_region->fmt.i_sar_den = p_region->fmt.i_aspect;
 612             p_region->fmt.i_sar_num = VOUT_ASPECT_FACTOR;
 613         }
 614         if( p_region &&
 615             (!p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den) )
 616         {
 617             p_region->fmt.i_sar_den = p_fmt->i_sar_den;
 618             p_region->fmt.i_sar_num = p_fmt->i_sar_num;
 619         }
 620
 621         /* Take care of the aspect ratio */
 622         if( p_region && p_region->fmt.i_sar_num * p_fmt->i_sar_den !=
 623             p_region->fmt.i_sar_den * p_fmt->i_sar_num )
 624         {
 625             i_scale_width = i_scale_width *
 626                 (int64_t)p_region->fmt.i_sar_num * p_fmt->i_sar_den /
 627                 p_region->fmt.i_sar_den / p_fmt->i_sar_num;
 628             i_subpic_x = p_subpic->i_x * i_scale_width / 1000;
 629         }
 630
 631         /* Load the scaling module */
 632         if( !p_spu->p_scale && (i_scale_width != 1000 ||
 633             i_scale_height != 1000) )
 634         {
 635             p_spu->p_scale = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 636             vlc_object_attach( p_spu->p_scale, p_spu );
 637             p_spu->p_scale->fmt_out.video.i_chroma =
 638                 p_spu->p_scale->fmt_in.video.i_chroma =
 639                     VLC_FOURCC('Y','U','V','P');
 640             /* XXX: We'll also be using it for YUVA and RGBA blending ... */
 641             p_spu->p_scale->fmt_in.video.i_width =
 642                 p_spu->p_scale->fmt_in.video.i_height = 32;
 643             p_spu->p_scale->fmt_out.video.i_width =
 644                 p_spu->p_scale->fmt_out.video.i_height = 16;
 645
 646             p_spu->p_scale->pf_vout_buffer_new = spu_new_video_buffer;
 647             p_spu->p_scale->pf_vout_buffer_del = spu_del_video_buffer;
 648             p_spu->p_scale->p_module =
 649                 module_Need( p_spu->p_scale, "video filter2", 0, 0 );
 650         }
 651
 652         while( p_region && p_spu->p_blend && p_spu->p_blend->pf_video_blend )
 653         {
 654             int i_fade_alpha = 255;
 655             int i_x_offset = p_region->i_x + i_subpic_x;
 656             int i_y_offset = p_region->i_y + p_subpic->i_y;
 657
 658             if( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
 659             {
 660                 if( p_spu->p_text && p_spu->p_text->p_module )
 661                 {
 662                     p_region->i_align = p_subpic->i_flags;
 663
 664                     if( p_spu->p_text->pf_render_html && p_region->psz_html )
 665                     {
 666                         p_spu->p_text->pf_render_html( p_spu->p_text,
 667                                                        p_region, p_region );
 668                     }
 669                     else if( p_spu->p_text->pf_render_text )
 670                     {
 671                         p_spu->p_text->pf_render_text( p_spu->p_text,
 672                                                        p_region, p_region );
 673                     }
 674                 }
 675             }
 676
 677             /* Force palette if requested */
 678             if( p_spu->b_force_palette && VLC_FOURCC('Y','U','V','P') ==
 679                 p_region->fmt.i_chroma )
 680             {
 681                 memcpy( p_region->fmt.p_palette->palette,
 682                         p_spu->palette, 16 );
 683             }
 684
 685             /* Scale SPU if necessary */
 686             if( p_region->p_cache )
 687             {
 688                 if( i_scale_width * p_region->fmt.i_width / 1000 !=
 689                     p_region->p_cache->fmt.i_width ||
 690                     i_scale_height * p_region->fmt.i_height / 1000 !=
 691                     p_region->p_cache->fmt.i_height )
 692                 {
 693                     p_subpic->pf_destroy_region( VLC_OBJECT(p_spu),
 694                                                  p_region->p_cache );
 695                     p_region->p_cache = 0;
 696                 }
 697             }
 698
 699             if( (i_scale_width != 1000 || i_scale_height != 1000) &&
 700                 p_spu->p_scale && !p_region->p_cache )
 701             {
 702                 picture_t *p_pic;
 703
 704                 p_spu->p_scale->fmt_in.video = p_region->fmt;
 705                 p_spu->p_scale->fmt_out.video = p_region->fmt;
 706
 707                 p_region->p_cache =
 708                     p_subpic->pf_create_region( VLC_OBJECT(p_spu),
 709                         &p_spu->p_scale->fmt_out.video );
 710                 if( p_spu->p_scale->fmt_out.video.p_palette )
 711                     *p_spu->p_scale->fmt_out.video.p_palette =
 712                         *p_region->fmt.p_palette;
 713                 p_region->p_cache->p_next = p_region->p_next;
 714
 715                 vout_CopyPicture( p_spu, &p_region->p_cache->picture,
 716                                   &p_region->picture );
 717
 718                 p_spu->p_scale->fmt_out.video.i_width =
 719                     p_region->fmt.i_width * i_scale_width / 1000;
 720                 p_spu->p_scale->fmt_out.video.i_visible_width =
 721                     p_region->fmt.i_visible_width * i_scale_width / 1000;
 722                 p_spu->p_scale->fmt_out.video.i_height =
 723                     p_region->fmt.i_height * i_scale_height / 1000;
 724                 p_spu->p_scale->fmt_out.video.i_visible_height =
 725                     p_region->fmt.i_visible_height * i_scale_height / 1000;
 726                 p_region->p_cache->fmt = p_spu->p_scale->fmt_out.video;
 727                 p_region->p_cache->i_x = p_region->i_x * i_scale_width / 1000;
 728                 p_region->p_cache->i_y = p_region->i_y * i_scale_height / 1000;
 729
 730                 p_pic = p_spu->p_scale->pf_video_filter(
 731                                  p_spu->p_scale, &p_region->p_cache->picture );
 732                 if( p_pic )
 733                 {
 734                     picture_t p_pic_tmp = p_region->p_cache->picture;
 735                     p_region->p_cache->picture = *p_pic;
 736                     *p_pic = p_pic_tmp;
 737                     free( p_pic );
 738                 }
 739             }
 740             if( (i_scale_width != 1000 || i_scale_height != 1000) &&
 741                 p_spu->p_scale && p_region->p_cache )
 742             {
 743                 p_region = p_region->p_cache;
 744             }
 745
 746             if( p_subpic->i_flags & SUBPICTURE_ALIGN_BOTTOM )
 747             {
 748                 i_y_offset = p_fmt->i_height - p_region->fmt.i_height -
 749                     p_subpic->i_y;
 750             }
 751             else if ( !(p_subpic->i_flags & SUBPICTURE_ALIGN_TOP) )
 752             {
 753                 i_y_offset = p_fmt->i_height / 2 - p_region->fmt.i_height / 2;
 754             }
 755
 756             if( p_subpic->i_flags & SUBPICTURE_ALIGN_RIGHT )
 757             {
 758                 i_x_offset = p_fmt->i_width - p_region->fmt.i_width -
 759                     i_subpic_x;
 760             }
 761             else if ( !(p_subpic->i_flags & SUBPICTURE_ALIGN_LEFT) )
 762             {
 763                 i_x_offset = p_fmt->i_width / 2 - p_region->fmt.i_width / 2;
 764             }
 765
 766             if( p_subpic->b_absolute )
 767             {
 768                 i_x_offset = p_region->i_x +
 769                     i_subpic_x * i_scale_width / 1000;
 770                 i_y_offset = p_region->i_y +
 771                     p_subpic->i_y * i_scale_height / 1000;
 772
 773             }
 774
 775             i_x_offset = __MAX( i_x_offset, 0 );
 776             i_y_offset = __MAX( i_y_offset, 0 );
 777
 778             if( p_spu->i_margin != 0 && p_spu->b_force_crop == VLC_FALSE )
 779             {
 780                 int i_diff = 0;
 781                 int i_low = i_y_offset - p_spu->i_margin;
 782                 int i_high = i_y_offset + p_region->fmt.i_height - p_spu->i_margin;
 783
 784                 /* crop extra margin to keep within bounds */
 785                 if( i_low < 0 ) i_diff = i_low;
 786                 if( i_high > (int)p_fmt->i_height ) i_diff = i_high - p_fmt->i_height;
 787                 i_y_offset -= ( p_spu->i_margin + i_diff );
 788             }
 789
 790             p_spu->p_blend->fmt_in.video = p_region->fmt;
 791
 792             /* Force cropping if requested */
 793             if( p_spu->b_force_crop )
 794             {
 795                 video_format_t *p_fmt = &p_spu->p_blend->fmt_in.video;
 796                 int i_crop_x = p_spu->i_crop_x * i_scale_width / 1000;
 797                 int i_crop_y = p_spu->i_crop_y * i_scale_height / 1000;
 798                 int i_crop_width = p_spu->i_crop_width * i_scale_width / 1000;
 799                 int i_crop_height = p_spu->i_crop_height * i_scale_height/1000;
 800
 801                 /* Find the intersection */
 802                 if( i_crop_x + i_crop_width <= i_x_offset ||
 803                     i_x_offset + (int)p_fmt->i_visible_width < i_crop_x ||
 804                     i_crop_y + i_crop_height <= i_y_offset ||
 805                     i_y_offset + (int)p_fmt->i_visible_height < i_crop_y )
 806                 {
 807                     /* No intersection */
 808                     p_fmt->i_visible_width = p_fmt->i_visible_height = 0;
 809                 }
 810                 else
 811                 {
 812                     int i_x, i_y, i_x_end, i_y_end;
 813                     i_x = __MAX( i_crop_x, i_x_offset );
 814                     i_y = __MAX( i_crop_y, i_y_offset );
 815                     i_x_end = __MIN( i_crop_x + i_crop_width,
 816                                    i_x_offset + (int)p_fmt->i_visible_width );
 817                     i_y_end = __MIN( i_crop_y + i_crop_height,
 818                                    i_y_offset + (int)p_fmt->i_visible_height );
 819
 820                     p_fmt->i_x_offset = i_x - i_x_offset;
 821                     p_fmt->i_y_offset = i_y - i_y_offset;
 822                     p_fmt->i_visible_width = i_x_end - i_x;
 823                     p_fmt->i_visible_height = i_y_end - i_y;
 824
 825                     i_x_offset = i_x;
 826                     i_y_offset = i_y;
 827                 }
 828             }
 829
 830             /* Update the output picture size */
 831             p_spu->p_blend->fmt_out.video.i_width =
 832                 p_spu->p_blend->fmt_out.video.i_visible_width =
 833                     p_fmt->i_width;
 834             p_spu->p_blend->fmt_out.video.i_height =
 835                 p_spu->p_blend->fmt_out.video.i_visible_height =
 836                     p_fmt->i_height;
 837
 838             if( p_subpic->b_fade )
 839             {
 840                 mtime_t i_fade_start = ( p_subpic->i_stop +
 841                                          p_subpic->i_start ) / 2;
 842                 mtime_t i_now = mdate();
 843                 if( i_now >= i_fade_start && p_subpic->i_stop > i_fade_start )
 844                 {
 845                     i_fade_alpha = 255 * ( p_subpic->i_stop - i_now ) /
 846                                    ( p_subpic->i_stop - i_fade_start );
 847                 }
 848             }
 849
 850             i_x_offset = __MAX( i_x_offset, 0 );
 851             i_y_offset = __MAX( i_y_offset, 0 );
 852
 853             p_spu->p_blend->pf_video_blend( p_spu->p_blend, p_pic_dst,
 854                 p_pic_src, &p_region->picture, i_x_offset, i_y_offset,
 855                 i_fade_alpha * p_subpic->i_alpha / 255 );
 856
 857             p_region = p_region->p_next;
 858         }
 859
 860         p_subpic = p_subpic->p_next;
 861     }
 862
 863     vlc_mutex_unlock( &p_spu->subpicture_lock );
 864 }
 865
 866 /*****************************************************************************
 867  * spu_SortSubpictures: find the subpictures to display
 868  *****************************************************************************
 869  * This function parses all subpictures and decides which ones need to be
 870  * displayed. This operation does not need lock, since only READY_SUBPICTURE
 871  * are handled. If no picture has been selected, display_date will depend on
 872  * the subpicture.
 873  * We also check for ephemer DVD subpictures (subpictures that have
 874  * to be removed if a newer one is available), which makes it a lot
 875  * more difficult to guess if a subpicture has to be rendered or not.
 876  *****************************************************************************/
 877 subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
 878                                    vlc_bool_t b_paused )
 879 {
 880     int i_index, i_channel;
 881     subpicture_t *p_subpic = NULL;
 882     subpicture_t *p_ephemer;
 883     mtime_t      ephemer_date;
 884
 885     /* Run subpicture filters */
 886     for( i_index = 0; i_index < p_spu->i_filter; i_index++ )
 887     {
 888         subpicture_t *p_subpic_filter;
 889         p_subpic_filter = p_spu->pp_filter[i_index]->
 890             pf_sub_filter( p_spu->pp_filter[i_index], display_date );
 891         if( p_subpic_filter )
 892         {
 893             spu_DisplaySubpicture( p_spu, p_subpic_filter );
 894         }
 895     }
 896
 897     /* We get an easily parsable chained list of subpictures which
 898      * ends with NULL since p_subpic was initialized to NULL. */
 899     for( i_channel = 0; i_channel < p_spu->i_channel; i_channel++ )
 900     {
 901         p_ephemer = 0;
 902         ephemer_date = 0;
 903
 904         for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
 905         {
 906             if( p_spu->p_subpicture[i_index].i_channel != i_channel ||
 907                 p_spu->p_subpicture[i_index].i_status != READY_SUBPICTURE )
 908             {
 909                 continue;
 910             }
 911             if( display_date &&
 912                 display_date < p_spu->p_subpicture[i_index].i_start )
 913             {
 914                 /* Too early, come back next monday */
 915                 continue;
 916             }
 917
 918             if( p_spu->p_subpicture[i_index].i_start > ephemer_date )
 919                 ephemer_date = p_spu->p_subpicture[i_index].i_start;
 920
 921             if( display_date > p_spu->p_subpicture[i_index].i_stop &&
 922                 ( !p_spu->p_subpicture[i_index].b_ephemer ||
 923                   p_spu->p_subpicture[i_index].i_stop >
 924                   p_spu->p_subpicture[i_index].i_start ) &&
 925                 !( p_spu->p_subpicture[i_index].b_pausable &&
 926                    b_paused ) )
 927             {
 928                 /* Too late, destroy the subpic */
 929                 spu_DestroySubpicture( p_spu, &p_spu->p_subpicture[i_index] );
 930                 continue;
 931             }
 932
 933             /* If this is an ephemer subpic, add it to our list */
 934             if( p_spu->p_subpicture[i_index].b_ephemer )
 935             {
 936                 p_spu->p_subpicture[i_index].p_next = p_ephemer;
 937                 p_ephemer = &p_spu->p_subpicture[i_index];
 938
 939                 continue;
 940             }
 941
 942             p_spu->p_subpicture[i_index].p_next = p_subpic;
 943             p_subpic = &p_spu->p_subpicture[i_index];
 944         }
 945
 946         /* If we found ephemer subpictures, check if they have to be
 947          * displayed or destroyed */
 948         while( p_ephemer != NULL )
 949         {
 950             subpicture_t *p_tmp = p_ephemer;
 951             p_ephemer = p_ephemer->p_next;
 952
 953             if( p_tmp->i_start < ephemer_date )
 954             {
 955                 /* Ephemer subpicture has lived too long */
 956                 spu_DestroySubpicture( p_spu, p_tmp );
 957             }
 958             else
 959             {
 960                 /* Ephemer subpicture can still live a bit */
 961                 p_tmp->p_next = p_subpic;
 962                 p_subpic = p_tmp;
 963             }
 964         }
 965     }
 966
 967     return p_subpic;
 968 }
 969
 970 /*****************************************************************************
 971  * SpuClearChannel: clear an spu channel
 972  *****************************************************************************
 973  * This function destroys the subpictures which belong to the spu channel
 974  * corresponding to i_channel_id.
 975  *****************************************************************************/
 976 static void SpuClearChannel( spu_t *p_spu, int i_channel )
 977 {
 978     int          i_subpic;                               /* subpicture index */
 979     subpicture_t *p_subpic = NULL;                  /* first free subpicture */
 980
 981     vlc_mutex_lock( &p_spu->subpicture_lock );
 982
 983     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 984     {
 985         p_subpic = &p_spu->p_subpicture[i_subpic];
 986         if( p_subpic->i_status == FREE_SUBPICTURE
 987             || ( p_subpic->i_status != RESERVED_SUBPICTURE
 988                  && p_subpic->i_status != READY_SUBPICTURE ) )
 989         {
 990             continue;
 991         }
 992
 993         if( p_subpic->i_channel == i_channel )
 994         {
 995             while( p_subpic->p_region )
 996             {
 997                 subpicture_region_t *p_region = p_subpic->p_region;
 998                 p_subpic->p_region = p_region->p_next;
 999                 spu_DestroyRegion( p_spu, p_region );
1000             }
1001
1002             if( p_subpic->pf_destroy ) p_subpic->pf_destroy( p_subpic );
1003             p_subpic->i_status = FREE_SUBPICTURE;
1004         }
1005     }
1006
1007     vlc_mutex_unlock( &p_spu->subpicture_lock );
1008 }
1009
1010 /*****************************************************************************
1011  * spu_ControlDefault: default methods for the subpicture unit control.
1012  *****************************************************************************/
1013 static int spu_vaControlDefault( spu_t *p_spu, int i_query, va_list args )
1014 {
1015     int *pi, i;
1016
1017     switch( i_query )
1018     {
1019     case SPU_CHANNEL_REGISTER:
1020         pi = (int *)va_arg( args, int * );
1021         if( pi ) *pi = p_spu->i_channel++;
1022         break;
1023
1024     case SPU_CHANNEL_CLEAR:
1025         i = (int)va_arg( args, int );
1026         SpuClearChannel( p_spu, i );
1027         break;
1028
1029     default:
1030         msg_Dbg( p_spu, "control query not supported" );
1031         return VLC_EGENERIC;
1032     }
1033
1034     return VLC_SUCCESS;
1035 }
1036
1037 /*****************************************************************************
1038  * Object variables callbacks
1039  *****************************************************************************/
1040
1041 /*****************************************************************************
1042  * UpdateSPU: update subpicture settings
1043  *****************************************************************************
1044  * This function is called from CropCallback and at initialization time, to
1045  * retrieve crop information from the input.
1046  *****************************************************************************/
1047 static void UpdateSPU( spu_t *p_spu, vlc_object_t *p_object )
1048 {
1049     vlc_value_t val;
1050
1051     p_spu->b_force_palette = VLC_FALSE;
1052     p_spu->b_force_crop = VLC_FALSE;
1053
1054     if( var_Get( p_object, "highlight", &val ) || !val.b_bool ) return;
1055
1056     p_spu->b_force_crop = VLC_TRUE;
1057     var_Get( p_object, "x-start", &val );
1058     p_spu->i_crop_x = val.i_int;
1059     var_Get( p_object, "y-start", &val );
1060     p_spu->i_crop_y = val.i_int;
1061     var_Get( p_object, "x-end", &val );
1062     p_spu->i_crop_width = val.i_int - p_spu->i_crop_x;
1063     var_Get( p_object, "y-end", &val );
1064     p_spu->i_crop_height = val.i_int - p_spu->i_crop_y;
1065
1066     if( var_Get( p_object, "menu-palette", &val ) == VLC_SUCCESS )
1067     {
1068         memcpy( p_spu->palette, val.p_address, 16 );
1069         p_spu->b_force_palette = VLC_TRUE;
1070     }
1071
1072     msg_Dbg( p_object, "crop: %i,%i,%i,%i, palette forced: %i",
1073              p_spu->i_crop_x, p_spu->i_crop_y,
1074              p_spu->i_crop_width, p_spu->i_crop_height,
1075              p_spu->b_force_palette );
1076 }
1077
1078 /*****************************************************************************
1079  * CropCallback: called when the highlight properties are changed
1080  *****************************************************************************
1081  * This callback is called from the input thread when we need cropping
1082  *****************************************************************************/
1083 static int CropCallback( vlc_object_t *p_object, char const *psz_var,
1084                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
1085 {
1086     (void)psz_var; (void)oldval; (void)newval;
1087     UpdateSPU( (spu_t *)p_data, p_object );
1088     return VLC_SUCCESS;
1089 }
1090
1091 /*****************************************************************************
1092  * Buffers allocation callbacks for the filters
1093  *****************************************************************************/
1094 static subpicture_t *sub_new_buffer( filter_t *p_filter )
1095 {
1096     filter_owner_sys_t *p_sys = p_filter->p_owner;
1097     subpicture_t *p_subpicture = spu_CreateSubpicture( p_sys->p_spu );
1098     if( p_subpicture ) p_subpicture->i_channel = p_sys->i_channel;
1099     return p_subpicture;
1100 }
1101
1102 static void sub_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1103 {
1104     filter_owner_sys_t *p_sys = p_filter->p_owner;
1105     spu_DestroySubpicture( p_sys->p_spu, p_subpic );
1106 }
1107
1108 static subpicture_t *spu_new_buffer( filter_t *p_filter )
1109 {
1110     subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
1111     (void)p_filter;
1112     memset( p_subpic, 0, sizeof(subpicture_t) );
1113     p_subpic->b_absolute = VLC_TRUE;
1114
1115     p_subpic->pf_create_region = __spu_CreateRegion;
1116     p_subpic->pf_make_region = __spu_MakeRegion;
1117     p_subpic->pf_destroy_region = __spu_DestroyRegion;
1118
1119     return p_subpic;
1120 }
1121
1122 static void spu_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1123 {
1124     while( p_subpic->p_region )
1125     {
1126         subpicture_region_t *p_region = p_subpic->p_region;
1127         p_subpic->p_region = p_region->p_next;
1128         p_subpic->pf_destroy_region( VLC_OBJECT(p_filter), p_region );
1129     }
1130
1131     free( p_subpic );
1132 }
1133
1134 static picture_t *spu_new_video_buffer( filter_t *p_filter )
1135 {
1136     picture_t *p_picture = malloc( sizeof(picture_t) );
1137
1138     if( vout_AllocatePicture( p_filter, p_picture,
1139                               p_filter->fmt_out.video.i_chroma,
1140                               p_filter->fmt_out.video.i_width,
1141                               p_filter->fmt_out.video.i_height,
1142                               p_filter->fmt_out.video.i_aspect )
1143         != VLC_SUCCESS )
1144     {
1145         free( p_picture );
1146         return NULL;
1147     }
1148
1149     p_picture->pf_release = RegionPictureRelease;
1150
1151     return p_picture;
1152 }
1153
1154 static void spu_del_video_buffer( filter_t *p_filter, picture_t *p_pic )
1155 {
1156     (void)p_filter;
1157     if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
1158     if( p_pic ) free( p_pic );
1159 }
1160
1161 static int SubFilterCallback( vlc_object_t *p_object, char const *psz_var,
1162                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
1163 {
1164     (void)p_object; (void)oldval; (void)newval;
1165
1166     if( !strcmp( psz_var, "sub-filter" ) )
1167     {
1168         spu_t *p_spu = (spu_t *)p_data;
1169         vlc_mutex_lock( &p_spu->subpicture_lock );
1170         spu_DeleteChain( p_spu );
1171         spu_ParseChain( p_spu );
1172         vlc_mutex_unlock( &p_spu->subpicture_lock );
1173     }
1174     return VLC_SUCCESS;
1175 }