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

   1 /*****************************************************************************
   2  * vout_subpictures.c : subpicture management functions
   3  *****************************************************************************
   4  * Copyright (C) 2000-2005 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 struct filter_owner_sys_t
  56 {
  57     spu_t *p_spu;
  58     int i_channel;
  59 };
  60
  61 /**
  62  * Creates the subpicture unit
  63  *
  64  * \param p_this the parent object which creates the subpicture unit
  65  */
  66 spu_t *__spu_Create( vlc_object_t *p_this )
  67 {
  68     int i_index;
  69     spu_t *p_spu = vlc_object_create( p_this, VLC_OBJECT_SPU );
  70
  71     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
  72     {
  73         p_spu->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
  74     }
  75
  76     p_spu->p_blend = NULL;
  77     p_spu->p_text = NULL;
  78     p_spu->p_scale = NULL;
  79     p_spu->i_filter = 0;
  80     p_spu->pf_control = spu_vaControlDefault;
  81
  82     /* Register the default subpicture channel */
  83     p_spu->i_channel = 2;
  84
  85     vlc_mutex_init( p_this, &p_spu->subpicture_lock );
  86
  87     vlc_object_attach( p_spu, p_this );
  88
  89     return p_spu;
  90 }
  91
  92 /**
  93  * Initialise the subpicture unit
  94  *
  95  * \param p_spu the subpicture unit object
  96  */
  97 int spu_Init( spu_t *p_spu )
  98 {
  99     char *psz_parser;
 100     vlc_value_t val;
 101
 102     /* If the user requested a sub margin, we force the position. */
 103     var_Create( p_spu, "sub-margin", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 104     var_Get( p_spu, "sub-margin", &val );
 105     p_spu->i_margin = val.i_int;
 106
 107     var_Create( p_spu, "sub-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 108     var_Get( p_spu, "sub-filter", &val );
 109
 110     psz_parser = val.psz_string;
 111
 112     while( psz_parser && *psz_parser )
 113     {
 114         config_chain_t *p_cfg; /* Do we ever need to free this ? */
 115         char *psz_name;
 116
 117         psz_parser = config_ChainCreate( &psz_name, &p_cfg, psz_parser );
 118
 119         msg_Dbg( p_spu, "adding sub-filter: %s", psz_name );
 120
 121         p_spu->pp_filter[p_spu->i_filter] =
 122             vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 123         vlc_object_attach( p_spu->pp_filter[p_spu->i_filter], p_spu );
 124         p_spu->pp_filter[p_spu->i_filter]->pf_sub_buffer_new = sub_new_buffer;
 125         p_spu->pp_filter[p_spu->i_filter]->pf_sub_buffer_del = sub_del_buffer;
 126         p_spu->pp_filter[p_spu->i_filter]->p_cfg = p_cfg;;
 127         p_spu->pp_filter[p_spu->i_filter]->p_module =
 128             module_Need( p_spu->pp_filter[p_spu->i_filter],
 129                          "sub filter", psz_name, 0 );
 130         if( p_spu->pp_filter[p_spu->i_filter]->p_module )
 131         {
 132             filter_owner_sys_t *p_sys = malloc( sizeof(filter_owner_sys_t) );
 133             p_spu->pp_filter[p_spu->i_filter]->p_owner = p_sys;
 134             spu_Control( p_spu, SPU_CHANNEL_REGISTER, &p_sys->i_channel );
 135             p_sys->p_spu = p_spu;
 136             p_spu->i_filter++;
 137         }
 138         else
 139         {
 140             msg_Dbg( p_spu, "no sub filter found" );
 141             vlc_object_detach( p_spu->pp_filter[p_spu->i_filter] );
 142             vlc_object_destroy( p_spu->pp_filter[p_spu->i_filter] );
 143         }
 144
 145         if( p_spu->i_filter >= 10 )
 146         {
 147             msg_Dbg( p_spu, "can't add anymore filters" );
 148         }
 149
 150         free( psz_name );
 151     }
 152     if( val.psz_string ) free( val.psz_string );
 153
 154     return VLC_EGENERIC;
 155 }
 156
 157 /**
 158  * Destroy the subpicture unit
 159  *
 160  * \param p_this the parent object which destroys the subpicture unit
 161  */
 162 void spu_Destroy( spu_t *p_spu )
 163 {
 164     int i_index;
 165
 166     vlc_object_detach( p_spu );
 167
 168     /* Destroy all remaining subpictures */
 169     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
 170     {
 171         if( p_spu->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
 172         {
 173             spu_DestroySubpicture( p_spu, &p_spu->p_subpicture[i_index] );
 174         }
 175     }
 176
 177     if( p_spu->p_blend )
 178     {
 179         if( p_spu->p_blend->p_module )
 180             module_Unneed( p_spu->p_blend, p_spu->p_blend->p_module );
 181
 182         vlc_object_detach( p_spu->p_blend );
 183         vlc_object_destroy( p_spu->p_blend );
 184     }
 185
 186     if( p_spu->p_text )
 187     {
 188         if( p_spu->p_text->p_module )
 189             module_Unneed( p_spu->p_text, p_spu->p_text->p_module );
 190
 191         vlc_object_detach( p_spu->p_text );
 192         vlc_object_destroy( p_spu->p_text );
 193     }
 194
 195     if( p_spu->p_scale )
 196     {
 197         if( p_spu->p_scale->p_module )
 198             module_Unneed( p_spu->p_scale, p_spu->p_scale->p_module );
 199
 200         vlc_object_detach( p_spu->p_scale );
 201         vlc_object_destroy( p_spu->p_scale );
 202     }
 203
 204     while( p_spu->i_filter-- )
 205     {
 206         module_Unneed( p_spu->pp_filter[p_spu->i_filter],
 207                        p_spu->pp_filter[p_spu->i_filter]->p_module );
 208         free( p_spu->pp_filter[p_spu->i_filter]->p_owner );
 209         vlc_object_detach( p_spu->pp_filter[p_spu->i_filter] );
 210         vlc_object_destroy( p_spu->pp_filter[p_spu->i_filter] );
 211     }
 212
 213     vlc_mutex_destroy( &p_spu->subpicture_lock );
 214     vlc_object_destroy( p_spu );
 215 }
 216
 217 /**
 218  * Attach/Detach the SPU from any input
 219  *
 220  * \param p_this the object in which to destroy the subpicture unit
 221  * \param b_attach to select attach or detach
 222  */
 223 void spu_Attach( spu_t *p_spu, vlc_object_t *p_this, vlc_bool_t b_attach )
 224 {
 225     vlc_object_t *p_input;
 226
 227     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 228     if( !p_input ) return;
 229
 230     if( b_attach )
 231     {
 232         UpdateSPU( p_spu, VLC_OBJECT(p_input) );
 233         var_AddCallback( p_input, "highlight", CropCallback, p_spu );
 234         vlc_object_release( p_input );
 235     }
 236     else
 237     {
 238         /* Delete callback */
 239         var_DelCallback( p_input, "highlight", CropCallback, p_spu );
 240         vlc_object_release( p_input );
 241     }
 242 }
 243
 244 /**
 245  * Create a subpicture region
 246  *
 247  * \param p_this vlc_object_t
 248  * \param p_fmt the format that this subpicture region should have
 249  */
 250 static void RegionPictureRelease( picture_t *p_pic )
 251 {
 252     if( p_pic->p_data_orig ) free( p_pic->p_data_orig );
 253 }
 254 subpicture_region_t *__spu_CreateRegion( vlc_object_t *p_this,
 255                                          video_format_t *p_fmt )
 256 {
 257     subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
 258     memset( p_region, 0, sizeof(subpicture_region_t) );
 259     p_region->p_next = 0;
 260     p_region->p_cache = 0;
 261     p_region->fmt = *p_fmt;
 262     p_region->psz_text = 0;
 263     p_region->p_style = NULL;
 264
 265     if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
 266         p_fmt->p_palette = p_region->fmt.p_palette =
 267             malloc( sizeof(video_palette_t) );
 268     else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
 269
 270     p_region->picture.p_data_orig = NULL;
 271
 272     if( p_fmt->i_chroma == VLC_FOURCC('T','E','X','T') ) return p_region;
 273
 274     vout_AllocatePicture( p_this, &p_region->picture, p_fmt->i_chroma,
 275                           p_fmt->i_width, p_fmt->i_height, p_fmt->i_aspect );
 276
 277     if( !p_region->picture.i_planes )
 278     {
 279         free( p_region );
 280         free( p_fmt->p_palette );
 281         return NULL;
 282     }
 283
 284     p_region->picture.pf_release = RegionPictureRelease;
 285
 286     return p_region;
 287 }
 288
 289 /**
 290  * Make a subpicture region from an existing picture_t
 291  *
 292  * \param p_this vlc_object_t
 293  * \param p_fmt the format that this subpicture region should have
 294  * \param p_pic a pointer to the picture creating the region (not freed)
 295  */
 296 subpicture_region_t *__spu_MakeRegion( vlc_object_t *p_this,
 297                                        video_format_t *p_fmt,
 298                                        picture_t *p_pic )
 299 {
 300     subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
 301     memset( p_region, 0, sizeof(subpicture_region_t) );
 302     p_region->p_next = 0;
 303     p_region->p_cache = 0;
 304     p_region->fmt = *p_fmt;
 305     p_region->psz_text = 0;
 306     p_region->p_style = NULL;
 307
 308     if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
 309         p_fmt->p_palette = p_region->fmt.p_palette =
 310             malloc( sizeof(video_palette_t) );
 311     else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
 312
 313     memcpy( &p_region->picture, p_pic, sizeof(picture_t) );
 314     p_region->picture.pf_release = RegionPictureRelease;
 315
 316     return p_region;
 317 }
 318
 319 /**
 320  * Destroy a subpicture region
 321  *
 322  * \param p_this vlc_object_t
 323  * \param p_region the subpicture region to destroy
 324  */
 325 void __spu_DestroyRegion( vlc_object_t *p_this, subpicture_region_t *p_region )
 326 {
 327     if( !p_region ) return;
 328     if( p_region->picture.pf_release )
 329         p_region->picture.pf_release( &p_region->picture );
 330     if( p_region->fmt.p_palette ) free( p_region->fmt.p_palette );
 331     if( p_region->p_cache ) __spu_DestroyRegion( p_this, p_region->p_cache );
 332     free( p_region );
 333 }
 334
 335 /**
 336  * Display a subpicture
 337  *
 338  * Remove the reservation flag of a subpicture, which will cause it to be
 339  * ready for display.
 340  * \param p_spu the subpicture unit object
 341  * \param p_subpic the subpicture to display
 342  */
 343 void spu_DisplaySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
 344 {
 345     /* Check if status is valid */
 346     if( p_subpic->i_status != RESERVED_SUBPICTURE )
 347     {
 348         msg_Err( p_spu, "subpicture %p has invalid status #%d",
 349                  p_subpic, p_subpic->i_status );
 350     }
 351
 352     /* Remove reservation flag */
 353     p_subpic->i_status = READY_SUBPICTURE;
 354
 355     if( p_subpic->i_channel == DEFAULT_CHAN )
 356     {
 357         p_subpic->i_channel = 0xFFFF;
 358         spu_Control( p_spu, SPU_CHANNEL_CLEAR, DEFAULT_CHAN );
 359         p_subpic->i_channel = DEFAULT_CHAN;
 360     }
 361 }
 362
 363 /**
 364  * Allocate a subpicture in the spu heap.
 365  *
 366  * This function create a reserved subpicture in the spu heap.
 367  * A null pointer is returned if the function fails. This method provides an
 368  * already allocated zone of memory in the spu data fields. It needs locking
 369  * since several pictures can be created by several producers threads.
 370  * \param p_spu the subpicture unit in which to create the subpicture
 371  * \return NULL on error, a reserved subpicture otherwise
 372  */
 373 subpicture_t *spu_CreateSubpicture( spu_t *p_spu )
 374 {
 375     int                 i_subpic;                        /* subpicture index */
 376     subpicture_t *      p_subpic = NULL;            /* first free subpicture */
 377
 378     /* Get lock */
 379     vlc_mutex_lock( &p_spu->subpicture_lock );
 380
 381     /*
 382      * Look for an empty place
 383      */
 384     p_subpic = NULL;
 385     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 386     {
 387         if( p_spu->p_subpicture[i_subpic].i_status == FREE_SUBPICTURE )
 388         {
 389             /* Subpicture is empty and ready for allocation */
 390             p_subpic = &p_spu->p_subpicture[i_subpic];
 391             p_spu->p_subpicture[i_subpic].i_status = RESERVED_SUBPICTURE;
 392             break;
 393         }
 394     }
 395
 396     /* If no free subpicture could be found */
 397     if( p_subpic == NULL )
 398     {
 399         msg_Err( p_spu, "subpicture heap is full" );
 400         vlc_mutex_unlock( &p_spu->subpicture_lock );
 401         return NULL;
 402     }
 403
 404     /* Copy subpicture information, set some default values */
 405     memset( p_subpic, 0, sizeof(subpicture_t) );
 406     p_subpic->i_status   = RESERVED_SUBPICTURE;
 407     p_subpic->b_absolute = VLC_TRUE;
 408     p_subpic->b_pausable = VLC_FALSE;
 409     p_subpic->b_fade     = VLC_FALSE;
 410     p_subpic->i_alpha    = 0xFF;
 411     p_subpic->p_region   = 0;
 412     p_subpic->pf_render  = 0;
 413     p_subpic->pf_destroy = 0;
 414     p_subpic->p_sys      = 0;
 415     vlc_mutex_unlock( &p_spu->subpicture_lock );
 416
 417     p_subpic->pf_create_region = __spu_CreateRegion;
 418     p_subpic->pf_make_region = __spu_MakeRegion;
 419     p_subpic->pf_destroy_region = __spu_DestroyRegion;
 420
 421     return p_subpic;
 422 }
 423
 424 /**
 425  * Remove a subpicture from the heap
 426  *
 427  * This function frees a previously reserved subpicture.
 428  * It is meant to be used when the construction of a picture aborted.
 429  * This function does not need locking since reserved subpictures are ignored
 430  * by the spu.
 431  */
 432 void spu_DestroySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
 433 {
 434     /* Get lock */
 435     vlc_mutex_lock( &p_spu->subpicture_lock );
 436
 437     /* There can be race conditions so we need to check the status */
 438     if( p_subpic->i_status == FREE_SUBPICTURE )
 439     {
 440         vlc_mutex_unlock( &p_spu->subpicture_lock );
 441         return;
 442     }
 443
 444     /* Check if status is valid */
 445     if( ( p_subpic->i_status != RESERVED_SUBPICTURE )
 446            && ( p_subpic->i_status != READY_SUBPICTURE ) )
 447     {
 448         msg_Err( p_spu, "subpicture %p has invalid status %d",
 449                          p_subpic, p_subpic->i_status );
 450     }
 451
 452     while( p_subpic->p_region )
 453     {
 454         subpicture_region_t *p_region = p_subpic->p_region;
 455         p_subpic->p_region = p_region->p_next;
 456         spu_DestroyRegion( p_spu, p_region );
 457     }
 458
 459     if( p_subpic->pf_destroy )
 460     {
 461         p_subpic->pf_destroy( p_subpic );
 462     }
 463
 464     p_subpic->i_status = FREE_SUBPICTURE;
 465
 466     vlc_mutex_unlock( &p_spu->subpicture_lock );
 467 }
 468
 469 /*****************************************************************************
 470  * spu_RenderSubpictures: render a subpicture list
 471  *****************************************************************************
 472  * This function renders all sub picture units in the list.
 473  *****************************************************************************/
 474 void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
 475                             picture_t *p_pic_dst, picture_t *p_pic_src,
 476                             subpicture_t *p_subpic,
 477                             int i_scale_width_orig, int i_scale_height_orig )
 478 {
 479     /* Get lock */
 480     vlc_mutex_lock( &p_spu->subpicture_lock );
 481
 482     /* Check i_status again to make sure spudec hasn't destroyed the subpic */
 483     while( p_subpic != NULL && p_subpic->i_status != FREE_SUBPICTURE )
 484     {
 485         subpicture_region_t *p_region = p_subpic->p_region;
 486         int i_scale_width, i_scale_height;
 487         int i_subpic_x = p_subpic->i_x;
 488
 489         /* Load the blending module */
 490         if( !p_spu->p_blend && p_region )
 491         {
 492             p_spu->p_blend = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 493             vlc_object_attach( p_spu->p_blend, p_spu );
 494             p_spu->p_blend->fmt_out.video.i_x_offset =
 495                 p_spu->p_blend->fmt_out.video.i_y_offset = 0;
 496             p_spu->p_blend->fmt_out.video.i_aspect = p_fmt->i_aspect;
 497             p_spu->p_blend->fmt_out.video.i_chroma = p_fmt->i_chroma;
 498             p_spu->p_blend->fmt_in.video.i_chroma = VLC_FOURCC('Y','U','V','P');
 499
 500             p_spu->p_blend->p_module =
 501                 module_Need( p_spu->p_blend, "video blending", 0, 0 );
 502         }
 503
 504         /* Load the text rendering module */
 505         if( !p_spu->p_text && p_region && p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
 506         {
 507             char *psz_modulename = NULL;
 508
 509             p_spu->p_text = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 510             vlc_object_attach( p_spu->p_text, p_spu );
 511
 512             p_spu->p_text->fmt_out.video.i_width =
 513                 p_spu->p_text->fmt_out.video.i_visible_width =
 514                 p_fmt->i_width;
 515             p_spu->p_text->fmt_out.video.i_height =
 516                 p_spu->p_text->fmt_out.video.i_visible_height =
 517                 p_fmt->i_height;
 518
 519             p_spu->p_text->pf_sub_buffer_new = spu_new_buffer;
 520             p_spu->p_text->pf_sub_buffer_del = spu_del_buffer;
 521
 522             psz_modulename = var_CreateGetString( p_spu, "text-renderer" );
 523             if( psz_modulename && *psz_modulename )
 524             {
 525                 p_spu->p_text->p_module =
 526                     module_Need( p_spu->p_text, "text renderer", psz_modulename, VLC_TRUE );
 527             }
 528             if( !p_spu->p_text->p_module )
 529             {
 530                 p_spu->p_text->p_module =
 531                     module_Need( p_spu->p_text, "text renderer", 0, 0 );
 532             }
 533             if( psz_modulename ) free( psz_modulename );
 534         }
 535         if( p_spu->p_text )
 536         {
 537             if( p_subpic->i_original_picture_height > 0 &&
 538                 p_subpic->i_original_picture_width  > 0 )
 539             {
 540                 p_spu->p_text->fmt_out.video.i_width =
 541                     p_spu->p_text->fmt_out.video.i_visible_width =
 542                     p_subpic->i_original_picture_width;
 543                 p_spu->p_text->fmt_out.video.i_height =
 544                     p_spu->p_text->fmt_out.video.i_visible_height =
 545                     p_subpic->i_original_picture_height;
 546             }
 547             else
 548             {
 549                 p_spu->p_text->fmt_out.video.i_width =
 550                     p_spu->p_text->fmt_out.video.i_visible_width =
 551                     p_fmt->i_width;
 552                 p_spu->p_text->fmt_out.video.i_height =
 553                     p_spu->p_text->fmt_out.video.i_visible_height =
 554                     p_fmt->i_height;
 555             }
 556         }
 557
 558         i_scale_width = i_scale_width_orig;
 559         i_scale_height = i_scale_height_orig;
 560
 561         if( p_subpic->i_original_picture_height > 0 &&
 562             p_subpic->i_original_picture_width  > 0 )
 563         {
 564             i_scale_width = i_scale_width * p_fmt->i_width /
 565                              p_subpic->i_original_picture_width;
 566             i_scale_height = i_scale_height * p_fmt->i_height /
 567                              p_subpic->i_original_picture_height;
 568         }
 569         else if( p_subpic->i_original_picture_height > 0 )
 570         {
 571             i_scale_height = i_scale_height * p_fmt->i_height /
 572                              p_subpic->i_original_picture_height;
 573             i_scale_width = i_scale_height * i_scale_height / p_fmt->i_height;
 574         }
 575
 576         /* Set default subpicture aspect ratio */
 577         if( p_region && p_region->fmt.i_aspect &&
 578             (!p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den) )
 579         {
 580             p_region->fmt.i_sar_den = p_region->fmt.i_aspect;
 581             p_region->fmt.i_sar_num = VOUT_ASPECT_FACTOR;
 582         }
 583         if( p_region &&
 584             (!p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den) )
 585         {
 586             p_region->fmt.i_sar_den = p_fmt->i_sar_den;
 587             p_region->fmt.i_sar_num = p_fmt->i_sar_num;
 588         }
 589
 590         /* Take care of the aspect ratio */
 591         if( p_region && p_region->fmt.i_sar_num * p_fmt->i_sar_den !=
 592             p_region->fmt.i_sar_den * p_fmt->i_sar_num )
 593         {
 594             i_scale_width = i_scale_width *
 595                 (int64_t)p_region->fmt.i_sar_num * p_fmt->i_sar_den /
 596                 p_region->fmt.i_sar_den / p_fmt->i_sar_num;
 597             i_subpic_x = p_subpic->i_x * i_scale_width / 1000;
 598         }
 599
 600         /* Load the scaling module */
 601         if( !p_spu->p_scale && (i_scale_width != 1000 ||
 602             i_scale_height != 1000) )
 603         {
 604             p_spu->p_scale = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
 605             vlc_object_attach( p_spu->p_scale, p_spu );
 606             p_spu->p_scale->fmt_out.video.i_chroma =
 607                 p_spu->p_scale->fmt_in.video.i_chroma =
 608                     VLC_FOURCC('Y','U','V','P');
 609             p_spu->p_scale->fmt_in.video.i_width =
 610                 p_spu->p_scale->fmt_in.video.i_height = 32;
 611             p_spu->p_scale->fmt_out.video.i_width =
 612                 p_spu->p_scale->fmt_out.video.i_height = 16;
 613
 614             p_spu->p_scale->pf_vout_buffer_new = spu_new_video_buffer;
 615             p_spu->p_scale->pf_vout_buffer_del = spu_del_video_buffer;
 616             p_spu->p_scale->p_module =
 617                 module_Need( p_spu->p_scale, "video filter2", 0, 0 );
 618         }
 619
 620         while( p_region && p_spu->p_blend && p_spu->p_blend->pf_video_blend )
 621         {
 622             int i_fade_alpha = 255;
 623             int i_x_offset = p_region->i_x + i_subpic_x;
 624             int i_y_offset = p_region->i_y + p_subpic->i_y;
 625
 626             if( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
 627             {
 628                 if( p_spu->p_text && p_spu->p_text->p_module &&
 629                     p_spu->p_text->pf_render_text )
 630                 {
 631                     p_region->i_align = p_subpic->i_flags;
 632                     p_spu->p_text->pf_render_text( p_spu->p_text,
 633                                                    p_region, p_region );
 634                 }
 635             }
 636
 637             /* Force palette if requested */
 638             if( p_spu->b_force_palette && VLC_FOURCC('Y','U','V','P') ==
 639                 p_region->fmt.i_chroma )
 640             {
 641                 memcpy( p_region->fmt.p_palette->palette,
 642                         p_spu->palette, 16 );
 643             }
 644
 645             /* Scale SPU if necessary */
 646             if( p_region->p_cache )
 647             {
 648                 if( i_scale_width * p_region->fmt.i_width / 1000 !=
 649                     p_region->p_cache->fmt.i_width ||
 650                     i_scale_height * p_region->fmt.i_height / 1000 !=
 651                     p_region->p_cache->fmt.i_height )
 652                 {
 653                     p_subpic->pf_destroy_region( VLC_OBJECT(p_spu),
 654                                                  p_region->p_cache );
 655                     p_region->p_cache = 0;
 656                 }
 657             }
 658
 659             if( (i_scale_width != 1000 || i_scale_height != 1000) &&
 660                 p_spu->p_scale && !p_region->p_cache )
 661             {
 662                 picture_t *p_pic;
 663
 664                 p_spu->p_scale->fmt_in.video = p_region->fmt;
 665                 p_spu->p_scale->fmt_out.video = p_region->fmt;
 666
 667                 p_region->p_cache =
 668                     p_subpic->pf_create_region( VLC_OBJECT(p_spu),
 669                         &p_spu->p_scale->fmt_out.video );
 670                 if( p_spu->p_scale->fmt_out.video.p_palette )
 671                     *p_spu->p_scale->fmt_out.video.p_palette =
 672                         *p_region->fmt.p_palette;
 673                 p_region->p_cache->p_next = p_region->p_next;
 674
 675                 vout_CopyPicture( p_spu, &p_region->p_cache->picture,
 676                                   &p_region->picture );
 677
 678                 p_spu->p_scale->fmt_out.video.i_width =
 679                     p_region->fmt.i_width * i_scale_width / 1000;
 680                 p_spu->p_scale->fmt_out.video.i_visible_width =
 681                     p_region->fmt.i_visible_width * i_scale_width / 1000;
 682                 p_spu->p_scale->fmt_out.video.i_height =
 683                     p_region->fmt.i_height * i_scale_height / 1000;
 684                 p_spu->p_scale->fmt_out.video.i_visible_height =
 685                     p_region->fmt.i_visible_height * i_scale_height / 1000;
 686                 p_region->p_cache->fmt = p_spu->p_scale->fmt_out.video;
 687                 p_region->p_cache->i_x = p_region->i_x * i_scale_width / 1000;
 688                 p_region->p_cache->i_y = p_region->i_y * i_scale_height / 1000;
 689
 690                 p_pic = p_spu->p_scale->pf_video_filter(
 691                                  p_spu->p_scale, &p_region->p_cache->picture );
 692                 if( p_pic )
 693                 {
 694                     picture_t p_pic_tmp = p_region->p_cache->picture;
 695                     p_region->p_cache->picture = *p_pic;
 696                     *p_pic = p_pic_tmp;
 697                     free( p_pic );
 698                 }
 699             }
 700             if( (i_scale_width != 1000 || i_scale_height != 1000) &&
 701                 p_spu->p_scale && p_region->p_cache )
 702             {
 703                 p_region = p_region->p_cache;
 704             }
 705
 706             if( p_subpic->i_flags & SUBPICTURE_ALIGN_BOTTOM )
 707             {
 708                 i_y_offset = p_fmt->i_height - p_region->fmt.i_height -
 709                     p_subpic->i_y;
 710             }
 711             else if ( !(p_subpic->i_flags & SUBPICTURE_ALIGN_TOP) )
 712             {
 713                 i_y_offset = p_fmt->i_height / 2 - p_region->fmt.i_height / 2;
 714             }
 715
 716             if( p_subpic->i_flags & SUBPICTURE_ALIGN_RIGHT )
 717             {
 718                 i_x_offset = p_fmt->i_width - p_region->fmt.i_width -
 719                     i_subpic_x;
 720             }
 721             else if ( !(p_subpic->i_flags & SUBPICTURE_ALIGN_LEFT) )
 722             {
 723                 i_x_offset = p_fmt->i_width / 2 - p_region->fmt.i_width / 2;
 724             }
 725
 726             if( p_subpic->b_absolute )
 727             {
 728                 i_x_offset = p_region->i_x +
 729                     i_subpic_x * i_scale_width / 1000;
 730                 i_y_offset = p_region->i_y +
 731                     p_subpic->i_y * i_scale_height / 1000;
 732
 733             }
 734
 735             if( p_spu->i_margin != 0 && p_spu->b_force_crop == VLC_FALSE )
 736             {
 737                 int i_diff = 0;
 738                 int i_low = i_y_offset - p_spu->i_margin;
 739                 int i_high = i_y_offset + p_region->fmt.i_height - p_spu->i_margin;
 740
 741                 /* crop extra margin to keep within bounds */
 742                 if( i_low < 0 ) i_diff = i_low;
 743                 if( i_high > (int)p_fmt->i_height ) i_diff = i_high - p_fmt->i_height;
 744                 i_y_offset -= ( p_spu->i_margin + i_diff );
 745             }
 746
 747             p_spu->p_blend->fmt_in.video = p_region->fmt;
 748
 749             /* Force cropping if requested */
 750             if( p_spu->b_force_crop )
 751             {
 752                 video_format_t *p_fmt = &p_spu->p_blend->fmt_in.video;
 753                 int i_crop_x = p_spu->i_crop_x * i_scale_width / 1000;
 754                 int i_crop_y = p_spu->i_crop_y * i_scale_height / 1000;
 755                 int i_crop_width = p_spu->i_crop_width * i_scale_width / 1000;
 756                 int i_crop_height = p_spu->i_crop_height * i_scale_height/1000;
 757
 758                 /* Find the intersection */
 759                 if( i_crop_x + i_crop_width <= i_x_offset ||
 760                     i_x_offset + (int)p_fmt->i_visible_width < i_crop_x ||
 761                     i_crop_y + i_crop_height <= i_y_offset ||
 762                     i_y_offset + (int)p_fmt->i_visible_height < i_crop_y )
 763                 {
 764                     /* No intersection */
 765                     p_fmt->i_visible_width = p_fmt->i_visible_height = 0;
 766                 }
 767                 else
 768                 {
 769                     int i_x, i_y, i_x_end, i_y_end;
 770                     i_x = __MAX( i_crop_x, i_x_offset );
 771                     i_y = __MAX( i_crop_y, i_y_offset );
 772                     i_x_end = __MIN( i_crop_x + i_crop_width,
 773                                    i_x_offset + (int)p_fmt->i_visible_width );
 774                     i_y_end = __MIN( i_crop_y + i_crop_height,
 775                                    i_y_offset + (int)p_fmt->i_visible_height );
 776
 777                     p_fmt->i_x_offset = i_x - i_x_offset;
 778                     p_fmt->i_y_offset = i_y - i_y_offset;
 779                     p_fmt->i_visible_width = i_x_end - i_x;
 780                     p_fmt->i_visible_height = i_y_end - i_y;
 781
 782                     i_x_offset = i_x;
 783                     i_y_offset = i_y;
 784                 }
 785             }
 786
 787             /* Update the output picture size */
 788             p_spu->p_blend->fmt_out.video.i_width =
 789                 p_spu->p_blend->fmt_out.video.i_visible_width =
 790                     p_fmt->i_width;
 791             p_spu->p_blend->fmt_out.video.i_height =
 792                 p_spu->p_blend->fmt_out.video.i_visible_height =
 793                     p_fmt->i_height;
 794
 795             if( p_subpic->b_fade )
 796             {
 797                 mtime_t i_fade_start = ( p_subpic->i_stop +
 798                                          p_subpic->i_start ) / 2;
 799                 mtime_t i_now = mdate();
 800                 if( i_now >= i_fade_start && p_subpic->i_stop > i_fade_start )
 801                 {
 802                     i_fade_alpha = 255 * ( p_subpic->i_stop - i_now ) /
 803                                    ( p_subpic->i_stop - i_fade_start );
 804                 }
 805             }
 806
 807             i_x_offset = __MIN( i_x_offset, 0 );
 808             i_y_offset = __MIN( i_y_offset, 0 );
 809
 810             p_spu->p_blend->pf_video_blend( p_spu->p_blend, p_pic_dst,
 811                 p_pic_src, &p_region->picture, i_x_offset, i_y_offset,
 812                 i_fade_alpha * p_subpic->i_alpha / 255 );
 813
 814             p_region = p_region->p_next;
 815         }
 816
 817         p_subpic = p_subpic->p_next;
 818     }
 819
 820     vlc_mutex_unlock( &p_spu->subpicture_lock );
 821 }
 822
 823 /*****************************************************************************
 824  * spu_SortSubpictures: find the subpictures to display
 825  *****************************************************************************
 826  * This function parses all subpictures and decides which ones need to be
 827  * displayed. This operation does not need lock, since only READY_SUBPICTURE
 828  * are handled. If no picture has been selected, display_date will depend on
 829  * the subpicture.
 830  * We also check for ephemer DVD subpictures (subpictures that have
 831  * to be removed if a newer one is available), which makes it a lot
 832  * more difficult to guess if a subpicture has to be rendered or not.
 833  *****************************************************************************/
 834 subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
 835                                    vlc_bool_t b_paused )
 836 {
 837     int i_index, i_channel;
 838     subpicture_t *p_subpic = NULL;
 839     subpicture_t *p_ephemer;
 840     mtime_t      ephemer_date;
 841
 842     /* Run subpicture filters */
 843     for( i_index = 0; i_index < p_spu->i_filter; i_index++ )
 844     {
 845         subpicture_t *p_subpic_filter;
 846         p_subpic_filter = p_spu->pp_filter[i_index]->
 847             pf_sub_filter( p_spu->pp_filter[i_index], display_date );
 848         if( p_subpic_filter )
 849         {
 850             spu_DisplaySubpicture( p_spu, p_subpic_filter );
 851         }
 852     }
 853
 854     /* We get an easily parsable chained list of subpictures which
 855      * ends with NULL since p_subpic was initialized to NULL. */
 856     for( i_channel = 0; i_channel < p_spu->i_channel; i_channel++ )
 857     {
 858         p_ephemer = 0;
 859         ephemer_date = 0;
 860
 861         for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
 862         {
 863             if( p_spu->p_subpicture[i_index].i_channel != i_channel ||
 864                 p_spu->p_subpicture[i_index].i_status != READY_SUBPICTURE )
 865             {
 866                 continue;
 867             }
 868             if( display_date &&
 869                 display_date < p_spu->p_subpicture[i_index].i_start )
 870             {
 871                 /* Too early, come back next monday */
 872                 continue;
 873             }
 874
 875             if( p_spu->p_subpicture[i_index].i_start > ephemer_date )
 876                 ephemer_date = p_spu->p_subpicture[i_index].i_start;
 877
 878             if( display_date > p_spu->p_subpicture[i_index].i_stop &&
 879                 ( !p_spu->p_subpicture[i_index].b_ephemer ||
 880                   p_spu->p_subpicture[i_index].i_stop >
 881                   p_spu->p_subpicture[i_index].i_start ) &&
 882                 !( p_spu->p_subpicture[i_index].b_pausable &&
 883                    b_paused ) )
 884             {
 885                 /* Too late, destroy the subpic */
 886                 spu_DestroySubpicture( p_spu, &p_spu->p_subpicture[i_index] );
 887                 continue;
 888             }
 889
 890             /* If this is an ephemer subpic, add it to our list */
 891             if( p_spu->p_subpicture[i_index].b_ephemer )
 892             {
 893                 p_spu->p_subpicture[i_index].p_next = p_ephemer;
 894                 p_ephemer = &p_spu->p_subpicture[i_index];
 895
 896                 continue;
 897             }
 898
 899             p_spu->p_subpicture[i_index].p_next = p_subpic;
 900             p_subpic = &p_spu->p_subpicture[i_index];
 901         }
 902
 903         /* If we found ephemer subpictures, check if they have to be
 904          * displayed or destroyed */
 905         while( p_ephemer != NULL )
 906         {
 907             subpicture_t *p_tmp = p_ephemer;
 908             p_ephemer = p_ephemer->p_next;
 909
 910             if( p_tmp->i_start < ephemer_date )
 911             {
 912                 /* Ephemer subpicture has lived too long */
 913                 spu_DestroySubpicture( p_spu, p_tmp );
 914             }
 915             else
 916             {
 917                 /* Ephemer subpicture can still live a bit */
 918                 p_tmp->p_next = p_subpic;
 919                 p_subpic = p_tmp;
 920             }
 921         }
 922     }
 923
 924     return p_subpic;
 925 }
 926
 927 /*****************************************************************************
 928  * SpuClearChannel: clear an spu channel
 929  *****************************************************************************
 930  * This function destroys the subpictures which belong to the spu channel
 931  * corresponding to i_channel_id.
 932  *****************************************************************************/
 933 static void SpuClearChannel( spu_t *p_spu, int i_channel )
 934 {
 935     int          i_subpic;                               /* subpicture index */
 936     subpicture_t *p_subpic = NULL;                  /* first free subpicture */
 937
 938     vlc_mutex_lock( &p_spu->subpicture_lock );
 939
 940     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 941     {
 942         p_subpic = &p_spu->p_subpicture[i_subpic];
 943         if( p_subpic->i_status == FREE_SUBPICTURE
 944             || ( p_subpic->i_status != RESERVED_SUBPICTURE
 945                  && p_subpic->i_status != READY_SUBPICTURE ) )
 946         {
 947             continue;
 948         }
 949
 950         if( p_subpic->i_channel == i_channel )
 951         {
 952             while( p_subpic->p_region )
 953             {
 954                 subpicture_region_t *p_region = p_subpic->p_region;
 955                 p_subpic->p_region = p_region->p_next;
 956                 spu_DestroyRegion( p_spu, p_region );
 957             }
 958
 959             if( p_subpic->pf_destroy ) p_subpic->pf_destroy( p_subpic );
 960             p_subpic->i_status = FREE_SUBPICTURE;
 961         }
 962     }
 963
 964     vlc_mutex_unlock( &p_spu->subpicture_lock );
 965 }
 966
 967 /*****************************************************************************
 968  * spu_ControlDefault: default methods for the subpicture unit control.
 969  *****************************************************************************/
 970 static int spu_vaControlDefault( spu_t *p_spu, int i_query, va_list args )
 971 {
 972     int *pi, i;
 973
 974     switch( i_query )
 975     {
 976     case SPU_CHANNEL_REGISTER:
 977         pi = (int *)va_arg( args, int * );
 978         if( pi ) *pi = p_spu->i_channel++;
 979         break;
 980
 981     case SPU_CHANNEL_CLEAR:
 982         i = (int)va_arg( args, int );
 983         SpuClearChannel( p_spu, i );
 984         break;
 985
 986     default:
 987         msg_Dbg( p_spu, "control query not supported" );
 988         return VLC_EGENERIC;
 989     }
 990
 991     return VLC_SUCCESS;
 992 }
 993
 994 /*****************************************************************************
 995  * Object variables callbacks
 996  *****************************************************************************/
 997
 998 /*****************************************************************************
 999  * UpdateSPU: update subpicture settings
1000  *****************************************************************************
1001  * This function is called from CropCallback and at initialization time, to
1002  * retrieve crop information from the input.
1003  *****************************************************************************/
1004 static void UpdateSPU( spu_t *p_spu, vlc_object_t *p_object )
1005 {
1006     vlc_value_t val;
1007
1008     p_spu->b_force_palette = VLC_FALSE;
1009     p_spu->b_force_crop = VLC_FALSE;
1010
1011     if( var_Get( p_object, "highlight", &val ) || !val.b_bool ) return;
1012
1013     p_spu->b_force_crop = VLC_TRUE;
1014     var_Get( p_object, "x-start", &val );
1015     p_spu->i_crop_x = val.i_int;
1016     var_Get( p_object, "y-start", &val );
1017     p_spu->i_crop_y = val.i_int;
1018     var_Get( p_object, "x-end", &val );
1019     p_spu->i_crop_width = val.i_int - p_spu->i_crop_x;
1020     var_Get( p_object, "y-end", &val );
1021     p_spu->i_crop_height = val.i_int - p_spu->i_crop_y;
1022
1023     if( var_Get( p_object, "menu-palette", &val ) == VLC_SUCCESS )
1024     {
1025         memcpy( p_spu->palette, val.p_address, 16 );
1026         p_spu->b_force_palette = VLC_TRUE;
1027     }
1028
1029     msg_Dbg( p_object, "crop: %i,%i,%i,%i, palette forced: %i",
1030              p_spu->i_crop_x, p_spu->i_crop_y,
1031              p_spu->i_crop_width, p_spu->i_crop_height,
1032              p_spu->b_force_palette );
1033 }
1034
1035 /*****************************************************************************
1036  * CropCallback: called when the highlight properties are changed
1037  *****************************************************************************
1038  * This callback is called from the input thread when we need cropping
1039  *****************************************************************************/
1040 static int CropCallback( vlc_object_t *p_object, char const *psz_var,
1041                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
1042 {
1043     UpdateSPU( (spu_t *)p_data, p_object );
1044     return VLC_SUCCESS;
1045 }
1046
1047 /*****************************************************************************
1048  * Buffers allocation callbacks for the filters
1049  *****************************************************************************/
1050 static subpicture_t *sub_new_buffer( filter_t *p_filter )
1051 {
1052     filter_owner_sys_t *p_sys = p_filter->p_owner;
1053     subpicture_t *p_subpicture = spu_CreateSubpicture( p_sys->p_spu );
1054     if( p_subpicture ) p_subpicture->i_channel = p_sys->i_channel;
1055     return p_subpicture;
1056 }
1057
1058 static void sub_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1059 {
1060     filter_owner_sys_t *p_sys = p_filter->p_owner;
1061     spu_DestroySubpicture( p_sys->p_spu, p_subpic );
1062 }
1063
1064 static subpicture_t *spu_new_buffer( filter_t *p_filter )
1065 {
1066     subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
1067     memset( p_subpic, 0, sizeof(subpicture_t) );
1068     p_subpic->b_absolute = VLC_TRUE;
1069
1070     p_subpic->pf_create_region = __spu_CreateRegion;
1071     p_subpic->pf_make_region = __spu_MakeRegion;
1072     p_subpic->pf_destroy_region = __spu_DestroyRegion;
1073
1074     return p_subpic;
1075 }
1076
1077 static void spu_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1078 {
1079     while( p_subpic->p_region )
1080     {
1081         subpicture_region_t *p_region = p_subpic->p_region;
1082         p_subpic->p_region = p_region->p_next;
1083         p_subpic->pf_destroy_region( VLC_OBJECT(p_filter), p_region );
1084     }
1085
1086     free( p_subpic );
1087 }
1088
1089 static picture_t *spu_new_video_buffer( filter_t *p_filter )
1090 {
1091     picture_t *p_picture = malloc( sizeof(picture_t) );
1092
1093     if( vout_AllocatePicture( p_filter, p_picture,
1094                               p_filter->fmt_out.video.i_chroma,
1095                               p_filter->fmt_out.video.i_width,
1096                               p_filter->fmt_out.video.i_height,
1097                               p_filter->fmt_out.video.i_aspect )
1098         != VLC_SUCCESS )
1099     {
1100         free( p_picture );
1101         return NULL;
1102     }
1103
1104     p_picture->pf_release = RegionPictureRelease;
1105
1106     return p_picture;
1107 }
1108
1109 static void spu_del_video_buffer( filter_t *p_filter, picture_t *p_pic )
1110 {
1111     if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
1112     if( p_pic ) free( p_pic );
1113 }