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     if( !p_region ) return NULL;
 281
 282     memset( p_region, 0, sizeof(subpicture_region_t) );
 283     p_region->p_next = 0;
 284     p_region->p_cache = 0;
 285     p_region->fmt = *p_fmt;
 286     p_region->psz_text = 0;
 287     p_region->p_style = NULL;
 288
 289     if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
 290         p_fmt->p_palette = p_region->fmt.p_palette =
 291             malloc( sizeof(video_palette_t) );
 292     else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
 293
 294     p_region->picture.p_data_orig = NULL;
 295
 296     if( p_fmt->i_chroma == VLC_FOURCC('T','E','X','T') ) return p_region;
 297
 298     vout_AllocatePicture( p_this, &p_region->picture, p_fmt->i_chroma,
 299                           p_fmt->i_width, p_fmt->i_height, p_fmt->i_aspect );
 300
 301     if( !p_region->picture.i_planes )
 302     {
 303         free( p_region );
 304         if( p_fmt->p_palette ) free( p_fmt->p_palette );
 305         return NULL;
 306     }
 307
 308     p_region->picture.pf_release = RegionPictureRelease;
 309
 310     return p_region;
 311 }
 312
 313 /**
 314  * Make a subpicture region from an existing picture_t
 315  *
 316  * \param p_this vlc_object_t
 317  * \param p_fmt the format that this subpicture region should have
 318  * \param p_pic a pointer to the picture creating the region (not freed)
 319  */
 320 subpicture_region_t *__spu_MakeRegion( vlc_object_t *p_this,
 321                                        video_format_t *p_fmt,
 322                                        picture_t *p_pic )
 323 {
 324     subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
 325     (void)p_this;
 326     memset( p_region, 0, sizeof(subpicture_region_t) );
 327     p_region->p_next = 0;
 328     p_region->p_cache = 0;
 329     p_region->fmt = *p_fmt;
 330     p_region->psz_text = 0;
 331     p_region->p_style = NULL;
 332
 333     if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
 334         p_fmt->p_palette = p_region->fmt.p_palette =
 335             malloc( sizeof(video_palette_t) );
 336     else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
 337
 338     memcpy( &p_region->picture, p_pic, sizeof(picture_t) );
 339     p_region->picture.pf_release = RegionPictureRelease;
 340
 341     return p_region;
 342 }
 343
 344 /**
 345  * Destroy a subpicture region
 346  *
 347  * \param p_this vlc_object_t
 348  * \param p_region the subpicture region to destroy
 349  */
 350 void __spu_DestroyRegion( vlc_object_t *p_this, subpicture_region_t *p_region )
 351 {
 352     if( !p_region ) return;
 353     if( p_region->picture.pf_release )
 354         p_region->picture.pf_release( &p_region->picture );
 355     if( p_region->fmt.p_palette ) free( p_region->fmt.p_palette );
 356     if( p_region->p_cache ) __spu_DestroyRegion( p_this, p_region->p_cache );
 357
 358     if( p_region->psz_text )
 359         free( p_region->psz_text );
 360     if( p_region->psz_html )
 361         free( p_region->psz_html );
 362     //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
 363     free( p_region );
 364 }
 365
 366 /**
 367  * Display a subpicture
 368  *
 369  * Remove the reservation flag of a subpicture, which will cause it to be
 370  * ready for display.
 371  * \param p_spu the subpicture unit object
 372  * \param p_subpic the subpicture to display
 373  */
 374 void spu_DisplaySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
 375 {
 376     /* Check if status is valid */
 377     if( p_subpic->i_status != RESERVED_SUBPICTURE )
 378     {
 379         msg_Err( p_spu, "subpicture %p has invalid status #%d",
 380                  p_subpic, p_subpic->i_status );
 381     }
 382
 383     /* Remove reservation flag */
 384     p_subpic->i_status = READY_SUBPICTURE;
 385
 386     if( p_subpic->i_channel == DEFAULT_CHAN )
 387     {
 388         p_subpic->i_channel = 0xFFFF;
 389         spu_Control( p_spu, SPU_CHANNEL_CLEAR, DEFAULT_CHAN );
 390         p_subpic->i_channel = DEFAULT_CHAN;
 391     }
 392 }
 393
 394 /**
 395  * Allocate a subpicture in the spu heap.
 396  *
 397  * This function create a reserved subpicture in the spu heap.
 398  * A null pointer is returned if the function fails. This method provides an
 399  * already allocated zone of memory in the spu data fields. It needs locking
 400  * since several pictures can be created by several producers threads.
 401  * \param p_spu the subpicture unit in which to create the subpicture
 402  * \return NULL on error, a reserved subpicture otherwise
 403  */
 404 subpicture_t *spu_CreateSubpicture( spu_t *p_spu )
 405 {
 406     int                 i_subpic;                        /* subpicture index */
 407     subpicture_t *      p_subpic = NULL;            /* first free subpicture */
 408
 409     /* Get lock */
 410     vlc_mutex_lock( &p_spu->subpicture_lock );
 411
 412     /*
 413      * Look for an empty place
 414      */
 415     p_subpic = NULL;
 416     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 417     {
 418         if( p_spu->p_subpicture[i_subpic].i_status == FREE_SUBPICTURE )
 419         {
 420             /* Subpicture is empty and ready for allocation */
 421             p_subpic = &p_spu->p_subpicture[i_subpic];
 422             p_spu->p_subpicture[i_subpic].i_status = RESERVED_SUBPICTURE;
 423             break;
 424         }
 425     }
 426
 427     /* If no free subpicture could be found */
 428     if( p_subpic == NULL )
 429     {
 430         msg_Err( p_spu, "subpicture heap is full" );
 431         vlc_mutex_unlock( &p_spu->subpicture_lock );
 432         return NULL;
 433     }
 434
 435     /* Copy subpicture information, set some default values */
 436     memset( p_subpic, 0, sizeof(subpicture_t) );
 437     p_subpic->i_status   = RESERVED_SUBPICTURE;
 438     p_subpic->b_absolute = VLC_TRUE;
 439     p_subpic->b_pausable = VLC_FALSE;
 440     p_subpic->b_fade     = VLC_FALSE;
 441     p_subpic->i_alpha    = 0xFF;
 442     p_subpic->p_region   = 0;
 443     p_subpic->pf_render  = 0;
 444     p_subpic->pf_destroy = 0;
 445     p_subpic->p_sys      = 0;
 446     vlc_mutex_unlock( &p_spu->subpicture_lock );
 447
 448     p_subpic->pf_create_region = __spu_CreateRegion;
 449     p_subpic->pf_make_region = __spu_MakeRegion;
 450     p_subpic->pf_destroy_region = __spu_DestroyRegion;
 451
 452     return p_subpic;
 453 }
 454
 455 /**
 456  * Remove a subpicture from the heap
 457  *
 458  * This function frees a previously reserved subpicture.
 459  * It is meant to be used when the construction of a picture aborted.
 460  * This function does not need locking since reserved subpictures are ignored
 461  * by the spu.
 462  */
 463 void spu_DestroySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
 464 {
 465     /* Get lock */
 466     vlc_mutex_lock( &p_spu->subpicture_lock );
 467
 468     /* There can be race conditions so we need to check the status */
 469     if( p_subpic->i_status == FREE_SUBPICTURE )
 470     {
 471         vlc_mutex_unlock( &p_spu->subpicture_lock );
 472         return;
 473     }
 474
 475     /* Check if status is valid */
 476     if( ( p_subpic->i_status != RESERVED_SUBPICTURE )
 477            && ( p_subpic->i_status != READY_SUBPICTURE ) )
 478     {
 479         msg_Err( p_spu, "subpicture %p has invalid status %d",
 480                          p_subpic, p_subpic->i_status );
 481     }
 482
 483     while( p_subpic->p_region )
 484     {
 485         subpicture_region_t *p_region = p_subpic->p_region;
 486         p_subpic->p_region = p_region->p_next;
 487         spu_DestroyRegion( p_spu, p_region );
 488     }
 489
 490     if( p_subpic->pf_destroy )
 491     {
 492         p_subpic->pf_destroy( p_subpic );
 493     }
 494
 495     p_subpic->i_status = FREE_SUBPICTURE;
 496
 497     vlc_mutex_unlock( &p_spu->subpicture_lock );
 498 }
 499
 500 /*****************************************************************************
 501  * spu_RenderSubpictures: render a subpicture list
 502  *****************************************************************************
 503  * This function renders all sub picture units in the list.
 504  *****************************************************************************/
 505 void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
 506                             picture_t *p_pic_dst, picture_t *p_pic_src,
 507                             subpicture_t *p_subpic,
 508                             int i_scale_width_orig, int i_scale_height_orig )
 509 {
 510     /* Get lock */
 511     vlc_mutex_lock( &p_spu->subpicture_lock );
 512
 513     /* Check i_status again to make sure spudec hasn't destroyed the subpic */
 514     while( p_subpic != NULL && p_subpic->i_status != FREE_SUBPICTURE )
 515     {
 516         subpicture_region_t *p_region = p_subpic->p_region;
 517         int i_scale_width, i_scale_height;
 518         int i_subpic_x = p_subpic->i_x;
 519
 520         /* Load the blending module */
 521         if( !p_spu->p_blend && p_region )
 522         {
 523             p_spu->p_blend = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 524             vlc_object_attach( p_spu->p_blend, p_spu );
 525             p_spu->p_blend->fmt_out.video.i_x_offset =
 526                 p_spu->p_blend->fmt_out.video.i_y_offset = 0;
 527             p_spu->p_blend->fmt_out.video.i_aspect = p_fmt->i_aspect;
 528             p_spu->p_blend->fmt_out.video.i_chroma = p_fmt->i_chroma;
 529             p_spu->p_blend->fmt_in.video.i_chroma = VLC_FOURCC('Y','U','V','P');
 530             /* XXX: We'll also be using it for YUVA and RGBA blending ... */
 531
 532             p_spu->p_blend->p_module =
 533                 module_Need( p_spu->p_blend, "video blending", 0, 0 );
 534         }
 535
 536         /* Load the text rendering module */
 537         if( !p_spu->p_text && p_region && p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
 538         {
 539             char *psz_modulename = NULL;
 540
 541             p_spu->p_text = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 542             vlc_object_attach( p_spu->p_text, p_spu );
 543
 544             p_spu->p_text->fmt_out.video.i_width =
 545                 p_spu->p_text->fmt_out.video.i_visible_width =
 546                 p_fmt->i_width;
 547             p_spu->p_text->fmt_out.video.i_height =
 548                 p_spu->p_text->fmt_out.video.i_visible_height =
 549                 p_fmt->i_height;
 550
 551             p_spu->p_text->pf_sub_buffer_new = spu_new_buffer;
 552             p_spu->p_text->pf_sub_buffer_del = spu_del_buffer;
 553
 554             psz_modulename = var_CreateGetString( p_spu, "text-renderer" );
 555             if( psz_modulename && *psz_modulename )
 556             {
 557                 p_spu->p_text->p_module =
 558                     module_Need( p_spu->p_text, "text renderer",
 559                                  psz_modulename, VLC_TRUE );
 560             }
 561             if( !p_spu->p_text->p_module )
 562             {
 563                 p_spu->p_text->p_module =
 564                     module_Need( p_spu->p_text, "text renderer", 0, 0 );
 565             }
 566             if( psz_modulename ) free( psz_modulename );
 567         }
 568         if( p_spu->p_text )
 569         {
 570             if( p_subpic->i_original_picture_height > 0 &&
 571                 p_subpic->i_original_picture_width  > 0 )
 572             {
 573                 p_spu->p_text->fmt_out.video.i_width =
 574                     p_spu->p_text->fmt_out.video.i_visible_width =
 575                     p_subpic->i_original_picture_width;
 576                 p_spu->p_text->fmt_out.video.i_height =
 577                     p_spu->p_text->fmt_out.video.i_visible_height =
 578                     p_subpic->i_original_picture_height;
 579             }
 580             else
 581             {
 582                 p_spu->p_text->fmt_out.video.i_width =
 583                     p_spu->p_text->fmt_out.video.i_visible_width =
 584                     p_fmt->i_width;
 585                 p_spu->p_text->fmt_out.video.i_height =
 586                     p_spu->p_text->fmt_out.video.i_visible_height =
 587                     p_fmt->i_height;
 588             }
 589         }
 590
 591         i_scale_width = i_scale_width_orig;
 592         i_scale_height = i_scale_height_orig;
 593
 594         if( p_subpic->i_original_picture_height > 0 &&
 595             p_subpic->i_original_picture_width  > 0 )
 596         {
 597             i_scale_width = i_scale_width * p_fmt->i_width /
 598                              p_subpic->i_original_picture_width;
 599             i_scale_height = i_scale_height * p_fmt->i_height /
 600                              p_subpic->i_original_picture_height;
 601         }
 602         else if( p_subpic->i_original_picture_height > 0 )
 603         {
 604             i_scale_height = i_scale_height * p_fmt->i_height /
 605                              p_subpic->i_original_picture_height;
 606             i_scale_width = i_scale_height * i_scale_height / p_fmt->i_height;
 607         }
 608
 609         /* Set default subpicture aspect ratio */
 610         if( p_region && p_region->fmt.i_aspect &&
 611             (!p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den) )
 612         {
 613             p_region->fmt.i_sar_den = p_region->fmt.i_aspect;
 614             p_region->fmt.i_sar_num = VOUT_ASPECT_FACTOR;
 615         }
 616         if( p_region &&
 617             (!p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den) )
 618         {
 619             p_region->fmt.i_sar_den = p_fmt->i_sar_den;
 620             p_region->fmt.i_sar_num = p_fmt->i_sar_num;
 621         }
 622
 623         /* Take care of the aspect ratio */
 624         if( p_region && p_region->fmt.i_sar_num * p_fmt->i_sar_den !=
 625             p_region->fmt.i_sar_den * p_fmt->i_sar_num )
 626         {
 627             i_scale_width = i_scale_width *
 628                 (int64_t)p_region->fmt.i_sar_num * p_fmt->i_sar_den /
 629                 p_region->fmt.i_sar_den / p_fmt->i_sar_num;
 630             i_subpic_x = p_subpic->i_x * i_scale_width / 1000;
 631         }
 632
 633         /* Load the scaling module */
 634         if( !p_spu->p_scale && (i_scale_width != 1000 ||
 635             i_scale_height != 1000) )
 636         {
 637             p_spu->p_scale = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 638             vlc_object_attach( p_spu->p_scale, p_spu );
 639             p_spu->p_scale->fmt_out.video.i_chroma =
 640                 p_spu->p_scale->fmt_in.video.i_chroma =
 641                     VLC_FOURCC('Y','U','V','P');
 642             /* XXX: We'll also be using it for YUVA and RGBA blending ... */
 643             p_spu->p_scale->fmt_in.video.i_width =
 644                 p_spu->p_scale->fmt_in.video.i_height = 32;
 645             p_spu->p_scale->fmt_out.video.i_width =
 646                 p_spu->p_scale->fmt_out.video.i_height = 16;
 647
 648             p_spu->p_scale->pf_vout_buffer_new = spu_new_video_buffer;
 649             p_spu->p_scale->pf_vout_buffer_del = spu_del_video_buffer;
 650             p_spu->p_scale->p_module =
 651                 module_Need( p_spu->p_scale, "video filter2", 0, 0 );
 652         }
 653
 654         while( p_region && p_spu->p_blend && p_spu->p_blend->pf_video_blend )
 655         {
 656             int i_fade_alpha = 255;
 657             int i_x_offset = p_region->i_x + i_subpic_x;
 658             int i_y_offset = p_region->i_y + p_subpic->i_y;
 659
 660             if( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
 661             {
 662                 if( p_spu->p_text && p_spu->p_text->p_module )
 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 &&
 679                 (VLC_FOURCC('Y','U','V','P') == 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                 p_region->p_cache->i_align = p_region->i_align;
 730
 731                 p_pic = p_spu->p_scale->pf_video_filter(
 732                                  p_spu->p_scale, &p_region->p_cache->picture );
 733                 if( p_pic )
 734                 {
 735                     picture_t p_pic_tmp = p_region->p_cache->picture;
 736                     p_region->p_cache->picture = *p_pic;
 737                     *p_pic = p_pic_tmp;
 738                     free( p_pic );
 739                 }
 740             }
 741             if( (i_scale_width != 1000 || i_scale_height != 1000) &&
 742                 p_spu->p_scale && p_region->p_cache )
 743             {
 744                 p_region = p_region->p_cache;
 745             }
 746
 747             if( p_region->i_align & SUBPICTURE_ALIGN_BOTTOM )
 748             {
 749                 i_y_offset = p_fmt->i_height - p_region->fmt.i_height -
 750                     p_subpic->i_y - p_region->i_y;
 751             }
 752             else if ( !(p_region->i_align & SUBPICTURE_ALIGN_TOP) )
 753             {
 754                 i_y_offset = p_fmt->i_height / 2 - p_region->fmt.i_height / 2;
 755             }
 756
 757             if( p_region->i_align & SUBPICTURE_ALIGN_RIGHT )
 758             {
 759                 i_x_offset = p_fmt->i_width - p_region->fmt.i_width -
 760                     i_subpic_x - p_region->i_x;
 761             }
 762             else if ( !(p_region->i_align & SUBPICTURE_ALIGN_LEFT) )
 763             {
 764                 i_x_offset = p_fmt->i_width / 2 - p_region->fmt.i_width / 2;
 765             }
 766
 767             if( p_subpic->b_absolute )
 768             {
 769                 i_x_offset = p_region->i_x +
 770                     i_subpic_x * i_scale_width / 1000;
 771                 i_y_offset = p_region->i_y +
 772                     p_subpic->i_y * i_scale_height / 1000;
 773
 774             }
 775
 776             i_x_offset = __MAX( i_x_offset, 0 );
 777             i_y_offset = __MAX( i_y_offset, 0 );
 778
 779             if( p_spu->i_margin != 0 && p_spu->b_force_crop == VLC_FALSE )
 780             {
 781                 int i_diff = 0;
 782                 int i_low = i_y_offset - p_spu->i_margin;
 783                 int i_high = i_y_offset + p_region->fmt.i_height - p_spu->i_margin;
 784
 785                 /* crop extra margin to keep within bounds */
 786                 if( i_low < 0 ) i_diff = i_low;
 787                 if( i_high > (int)p_fmt->i_height ) i_diff = i_high - p_fmt->i_height;
 788                 i_y_offset -= ( p_spu->i_margin + i_diff );
 789             }
 790
 791             p_spu->p_blend->fmt_in.video = p_region->fmt;
 792
 793             /* Force cropping if requested */
 794             if( p_spu->b_force_crop )
 795             {
 796                 video_format_t *p_fmt = &p_spu->p_blend->fmt_in.video;
 797                 int i_crop_x = p_spu->i_crop_x * i_scale_width / 1000;
 798                 int i_crop_y = p_spu->i_crop_y * i_scale_height / 1000;
 799                 int i_crop_width = p_spu->i_crop_width * i_scale_width / 1000;
 800                 int i_crop_height = p_spu->i_crop_height * i_scale_height/1000;
 801
 802                 /* Find the intersection */
 803                 if( i_crop_x + i_crop_width <= i_x_offset ||
 804                     i_x_offset + (int)p_fmt->i_visible_width < i_crop_x ||
 805                     i_crop_y + i_crop_height <= i_y_offset ||
 806                     i_y_offset + (int)p_fmt->i_visible_height < i_crop_y )
 807                 {
 808                     /* No intersection */
 809                     p_fmt->i_visible_width = p_fmt->i_visible_height = 0;
 810                 }
 811                 else
 812                 {
 813                     int i_x, i_y, i_x_end, i_y_end;
 814                     i_x = __MAX( i_crop_x, i_x_offset );
 815                     i_y = __MAX( i_crop_y, i_y_offset );
 816                     i_x_end = __MIN( i_crop_x + i_crop_width,
 817                                    i_x_offset + (int)p_fmt->i_visible_width );
 818                     i_y_end = __MIN( i_crop_y + i_crop_height,
 819                                    i_y_offset + (int)p_fmt->i_visible_height );
 820
 821                     p_fmt->i_x_offset = i_x - i_x_offset;
 822                     p_fmt->i_y_offset = i_y - i_y_offset;
 823                     p_fmt->i_visible_width = i_x_end - i_x;
 824                     p_fmt->i_visible_height = i_y_end - i_y;
 825
 826                     i_x_offset = i_x;
 827                     i_y_offset = i_y;
 828                 }
 829             }
 830
 831             /* Update the output picture size */
 832             p_spu->p_blend->fmt_out.video.i_width =
 833                 p_spu->p_blend->fmt_out.video.i_visible_width =
 834                     p_fmt->i_width;
 835             p_spu->p_blend->fmt_out.video.i_height =
 836                 p_spu->p_blend->fmt_out.video.i_visible_height =
 837                     p_fmt->i_height;
 838
 839             if( p_subpic->b_fade )
 840             {
 841                 mtime_t i_fade_start = ( p_subpic->i_stop +
 842                                          p_subpic->i_start ) / 2;
 843                 mtime_t i_now = mdate();
 844                 if( i_now >= i_fade_start && p_subpic->i_stop > i_fade_start )
 845                 {
 846                     i_fade_alpha = 255 * ( p_subpic->i_stop - i_now ) /
 847                                    ( p_subpic->i_stop - i_fade_start );
 848                 }
 849             }
 850
 851             i_x_offset = __MAX( i_x_offset, 0 );
 852             i_y_offset = __MAX( i_y_offset, 0 );
 853
 854             p_spu->p_blend->pf_video_blend( p_spu->p_blend, p_pic_dst,
 855                 p_pic_src, &p_region->picture, i_x_offset, i_y_offset,
 856                 i_fade_alpha * p_subpic->i_alpha / 255 );
 857
 858             p_region = p_region->p_next;
 859         }
 860
 861         p_subpic = p_subpic->p_next;
 862     }
 863
 864     vlc_mutex_unlock( &p_spu->subpicture_lock );
 865 }
 866
 867 /*****************************************************************************
 868  * spu_SortSubpictures: find the subpictures to display
 869  *****************************************************************************
 870  * This function parses all subpictures and decides which ones need to be
 871  * displayed. This operation does not need lock, since only READY_SUBPICTURE
 872  * are handled. If no picture has been selected, display_date will depend on
 873  * the subpicture.
 874  * We also check for ephemer DVD subpictures (subpictures that have
 875  * to be removed if a newer one is available), which makes it a lot
 876  * more difficult to guess if a subpicture has to be rendered or not.
 877  *****************************************************************************/
 878 subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
 879                                    vlc_bool_t b_paused )
 880 {
 881     int i_index, i_channel;
 882     subpicture_t *p_subpic = NULL;
 883     subpicture_t *p_ephemer;
 884     mtime_t      ephemer_date;
 885
 886     /* Run subpicture filters */
 887     for( i_index = 0; i_index < p_spu->i_filter; i_index++ )
 888     {
 889         subpicture_t *p_subpic_filter;
 890         p_subpic_filter = p_spu->pp_filter[i_index]->
 891             pf_sub_filter( p_spu->pp_filter[i_index], display_date );
 892         if( p_subpic_filter )
 893         {
 894             spu_DisplaySubpicture( p_spu, p_subpic_filter );
 895         }
 896     }
 897
 898     /* We get an easily parsable chained list of subpictures which
 899      * ends with NULL since p_subpic was initialized to NULL. */
 900     for( i_channel = 0; i_channel < p_spu->i_channel; i_channel++ )
 901     {
 902         p_ephemer = 0;
 903         ephemer_date = 0;
 904
 905         for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
 906         {
 907             if( p_spu->p_subpicture[i_index].i_channel != i_channel ||
 908                 p_spu->p_subpicture[i_index].i_status != READY_SUBPICTURE )
 909             {
 910                 continue;
 911             }
 912             if( display_date &&
 913                 display_date < p_spu->p_subpicture[i_index].i_start )
 914             {
 915                 /* Too early, come back next monday */
 916                 continue;
 917             }
 918
 919             if( p_spu->p_subpicture[i_index].i_start > ephemer_date )
 920                 ephemer_date = p_spu->p_subpicture[i_index].i_start;
 921
 922             if( display_date > p_spu->p_subpicture[i_index].i_stop &&
 923                 ( !p_spu->p_subpicture[i_index].b_ephemer ||
 924                   p_spu->p_subpicture[i_index].i_stop >
 925                   p_spu->p_subpicture[i_index].i_start ) &&
 926                 !( p_spu->p_subpicture[i_index].b_pausable &&
 927                    b_paused ) )
 928             {
 929                 /* Too late, destroy the subpic */
 930                 spu_DestroySubpicture( p_spu, &p_spu->p_subpicture[i_index] );
 931                 continue;
 932             }
 933
 934             /* If this is an ephemer subpic, add it to our list */
 935             if( p_spu->p_subpicture[i_index].b_ephemer )
 936             {
 937                 p_spu->p_subpicture[i_index].p_next = p_ephemer;
 938                 p_ephemer = &p_spu->p_subpicture[i_index];
 939
 940                 continue;
 941             }
 942
 943             p_spu->p_subpicture[i_index].p_next = p_subpic;
 944             p_subpic = &p_spu->p_subpicture[i_index];
 945         }
 946
 947         /* If we found ephemer subpictures, check if they have to be
 948          * displayed or destroyed */
 949         while( p_ephemer != NULL )
 950         {
 951             subpicture_t *p_tmp = p_ephemer;
 952             p_ephemer = p_ephemer->p_next;
 953
 954             if( p_tmp->i_start < ephemer_date )
 955             {
 956                 /* Ephemer subpicture has lived too long */
 957                 spu_DestroySubpicture( p_spu, p_tmp );
 958             }
 959             else
 960             {
 961                 /* Ephemer subpicture can still live a bit */
 962                 p_tmp->p_next = p_subpic;
 963                 p_subpic = p_tmp;
 964             }
 965         }
 966     }
 967
 968     return p_subpic;
 969 }
 970
 971 /*****************************************************************************
 972  * SpuClearChannel: clear an spu channel
 973  *****************************************************************************
 974  * This function destroys the subpictures which belong to the spu channel
 975  * corresponding to i_channel_id.
 976  *****************************************************************************/
 977 static void SpuClearChannel( spu_t *p_spu, int i_channel )
 978 {
 979     int          i_subpic;                               /* subpicture index */
 980     subpicture_t *p_subpic = NULL;                  /* first free subpicture */
 981
 982     vlc_mutex_lock( &p_spu->subpicture_lock );
 983
 984     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 985     {
 986         p_subpic = &p_spu->p_subpicture[i_subpic];
 987         if( p_subpic->i_status == FREE_SUBPICTURE
 988             || ( p_subpic->i_status != RESERVED_SUBPICTURE
 989                  && p_subpic->i_status != READY_SUBPICTURE ) )
 990         {
 991             continue;
 992         }
 993
 994         if( p_subpic->i_channel == i_channel )
 995         {
 996             while( p_subpic->p_region )
 997             {
 998                 subpicture_region_t *p_region = p_subpic->p_region;
 999                 p_subpic->p_region = p_region->p_next;
1000                 spu_DestroyRegion( p_spu, p_region );
1001             }
1002
1003             if( p_subpic->pf_destroy ) p_subpic->pf_destroy( p_subpic );
1004             p_subpic->i_status = FREE_SUBPICTURE;
1005         }
1006     }
1007
1008     vlc_mutex_unlock( &p_spu->subpicture_lock );
1009 }
1010
1011 /*****************************************************************************
1012  * spu_ControlDefault: default methods for the subpicture unit control.
1013  *****************************************************************************/
1014 static int spu_vaControlDefault( spu_t *p_spu, int i_query, va_list args )
1015 {
1016     int *pi, i;
1017
1018     switch( i_query )
1019     {
1020     case SPU_CHANNEL_REGISTER:
1021         pi = (int *)va_arg( args, int * );
1022         if( pi ) *pi = p_spu->i_channel++;
1023         break;
1024
1025     case SPU_CHANNEL_CLEAR:
1026         i = (int)va_arg( args, int );
1027         SpuClearChannel( p_spu, i );
1028         break;
1029
1030     default:
1031         msg_Dbg( p_spu, "control query not supported" );
1032         return VLC_EGENERIC;
1033     }
1034
1035     return VLC_SUCCESS;
1036 }
1037
1038 /*****************************************************************************
1039  * Object variables callbacks
1040  *****************************************************************************/
1041
1042 /*****************************************************************************
1043  * UpdateSPU: update subpicture settings
1044  *****************************************************************************
1045  * This function is called from CropCallback and at initialization time, to
1046  * retrieve crop information from the input.
1047  *****************************************************************************/
1048 static void UpdateSPU( spu_t *p_spu, vlc_object_t *p_object )
1049 {
1050     vlc_value_t val;
1051
1052     p_spu->b_force_palette = VLC_FALSE;
1053     p_spu->b_force_crop = VLC_FALSE;
1054
1055     if( var_Get( p_object, "highlight", &val ) || !val.b_bool ) return;
1056
1057     p_spu->b_force_crop = VLC_TRUE;
1058     var_Get( p_object, "x-start", &val );
1059     p_spu->i_crop_x = val.i_int;
1060     var_Get( p_object, "y-start", &val );
1061     p_spu->i_crop_y = val.i_int;
1062     var_Get( p_object, "x-end", &val );
1063     p_spu->i_crop_width = val.i_int - p_spu->i_crop_x;
1064     var_Get( p_object, "y-end", &val );
1065     p_spu->i_crop_height = val.i_int - p_spu->i_crop_y;
1066
1067     if( var_Get( p_object, "menu-palette", &val ) == VLC_SUCCESS )
1068     {
1069         memcpy( p_spu->palette, val.p_address, 16 );
1070         p_spu->b_force_palette = VLC_TRUE;
1071     }
1072
1073     msg_Dbg( p_object, "crop: %i,%i,%i,%i, palette forced: %i",
1074              p_spu->i_crop_x, p_spu->i_crop_y,
1075              p_spu->i_crop_width, p_spu->i_crop_height,
1076              p_spu->b_force_palette );
1077 }
1078
1079 /*****************************************************************************
1080  * CropCallback: called when the highlight properties are changed
1081  *****************************************************************************
1082  * This callback is called from the input thread when we need cropping
1083  *****************************************************************************/
1084 static int CropCallback( vlc_object_t *p_object, char const *psz_var,
1085                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
1086 {
1087     (void)psz_var; (void)oldval; (void)newval;
1088     UpdateSPU( (spu_t *)p_data, p_object );
1089     return VLC_SUCCESS;
1090 }
1091
1092 /*****************************************************************************
1093  * Buffers allocation callbacks for the filters
1094  *****************************************************************************/
1095 static subpicture_t *sub_new_buffer( filter_t *p_filter )
1096 {
1097     filter_owner_sys_t *p_sys = p_filter->p_owner;
1098     subpicture_t *p_subpicture = spu_CreateSubpicture( p_sys->p_spu );
1099     if( p_subpicture ) p_subpicture->i_channel = p_sys->i_channel;
1100     return p_subpicture;
1101 }
1102
1103 static void sub_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1104 {
1105     filter_owner_sys_t *p_sys = p_filter->p_owner;
1106     spu_DestroySubpicture( p_sys->p_spu, p_subpic );
1107 }
1108
1109 static subpicture_t *spu_new_buffer( filter_t *p_filter )
1110 {
1111     subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
1112     (void)p_filter;
1113     memset( p_subpic, 0, sizeof(subpicture_t) );
1114     p_subpic->b_absolute = VLC_TRUE;
1115
1116     p_subpic->pf_create_region = __spu_CreateRegion;
1117     p_subpic->pf_make_region = __spu_MakeRegion;
1118     p_subpic->pf_destroy_region = __spu_DestroyRegion;
1119
1120     return p_subpic;
1121 }
1122
1123 static void spu_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1124 {
1125     while( p_subpic->p_region )
1126     {
1127         subpicture_region_t *p_region = p_subpic->p_region;
1128         p_subpic->p_region = p_region->p_next;
1129         p_subpic->pf_destroy_region( VLC_OBJECT(p_filter), p_region );
1130     }
1131
1132     free( p_subpic );
1133 }
1134
1135 static picture_t *spu_new_video_buffer( filter_t *p_filter )
1136 {
1137     picture_t *p_picture = malloc( sizeof(picture_t) );
1138
1139     if( vout_AllocatePicture( p_filter, p_picture,
1140                               p_filter->fmt_out.video.i_chroma,
1141                               p_filter->fmt_out.video.i_width,
1142                               p_filter->fmt_out.video.i_height,
1143                               p_filter->fmt_out.video.i_aspect )
1144         != VLC_SUCCESS )
1145     {
1146         free( p_picture );
1147         return NULL;
1148     }
1149
1150     p_picture->pf_release = RegionPictureRelease;
1151
1152     return p_picture;
1153 }
1154
1155 static void spu_del_video_buffer( filter_t *p_filter, picture_t *p_pic )
1156 {
1157     (void)p_filter;
1158     if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
1159     if( p_pic ) free( p_pic );
1160 }
1161
1162 static int SubFilterCallback( vlc_object_t *p_object, char const *psz_var,
1163                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
1164 {
1165     (void)p_object; (void)oldval; (void)newval;
1166
1167     if( !strcmp( psz_var, "sub-filter" ) )
1168     {
1169         spu_t *p_spu = (spu_t *)p_data;
1170         vlc_mutex_lock( &p_spu->subpicture_lock );
1171         spu_DeleteChain( p_spu );
1172         spu_ParseChain( p_spu );
1173         vlc_mutex_unlock( &p_spu->subpicture_lock );
1174     }
1175     return VLC_SUCCESS;
1176 }