git.sesse.net Git - vlc/blob - modules/codec/subtitles/subsusf.c

   1 /*****************************************************************************
   2  * subsusf.c : USF subtitles decoder
   3  *****************************************************************************
   4  * Copyright (C) 2000-2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Bernie Purcell <bitmap@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 # include "config.h"
  25 #endif
  26
  27 #include "subsdec.h"
  28 #include <vlc_plugin.h>
  29
  30 /*****************************************************************************
  31  * Local prototypes
  32  *****************************************************************************/
  33 static int  OpenDecoder   ( vlc_object_t * );
  34 static void CloseDecoder  ( vlc_object_t * );
  35
  36 static subpicture_t *DecodeBlock   ( decoder_t *, block_t ** );
  37 static char         *CreatePlainText( char * );
  38 static int           ParseImageAttachments( decoder_t *p_dec );
  39
  40 static subpicture_t        *ParseText     ( decoder_t *, block_t * );
  41 static void                 ParseUSFHeader( decoder_t * );
  42 static subpicture_region_t *ParseUSFString( decoder_t *, char *, subpicture_t * );
  43 static subpicture_region_t *LoadEmbeddedImage( decoder_t *p_dec, subpicture_t *p_spu, const char *psz_filename, int i_transparent_color );
  44
  45 /*****************************************************************************
  46  * Module descriptor.
  47  *****************************************************************************/
  48
  49 vlc_module_begin();
  50     set_capability( "decoder", 40 );
  51     set_shortname( N_("USFSubs"));
  52     set_description( N_("USF subtitles decoder") );
  53     set_callbacks( OpenDecoder, CloseDecoder );
  54     set_category( CAT_INPUT );
  55     set_subcategory( SUBCAT_INPUT_SCODEC );
  56     /* We inherit subsdec-align and subsdec-formatted from subsdec.c */
  57 vlc_module_end();
  58
  59 /*****************************************************************************
  60  * OpenDecoder: probe the decoder and return score
  61  *****************************************************************************
  62  * Tries to launch a decoder and return score so that the interface is able
  63  * to chose.
  64  *****************************************************************************/
  65 static int OpenDecoder( vlc_object_t *p_this )
  66 {
  67     decoder_t     *p_dec = (decoder_t*)p_this;
  68     decoder_sys_t *p_sys;
  69     vlc_value_t    val;
  70
  71     if( p_dec->fmt_in.i_codec != VLC_FOURCC('u','s','f',' ') )
  72     {
  73         return VLC_EGENERIC;
  74     }
  75
  76     p_dec->pf_decode_sub = DecodeBlock;
  77
  78     /* Allocate the memory needed to store the decoder's structure */
  79     if( ( p_dec->p_sys = p_sys =
  80           (decoder_sys_t *)calloc(1, sizeof(decoder_sys_t)) ) == NULL )
  81     {
  82         return VLC_ENOMEM;
  83     }
  84
  85     /* Unused fields of p_sys - not needed for USF decoding */
  86     p_sys->b_ass = false;
  87     p_sys->iconv_handle = (vlc_iconv_t)-1;
  88     p_sys->b_autodetect_utf8 = false;
  89
  90     /* init of p_sys */
  91     p_sys->i_align = 0;
  92     p_sys->i_original_height = -1;
  93     p_sys->i_original_width = -1;
  94     TAB_INIT( p_sys->i_ssa_styles, p_sys->pp_ssa_styles );
  95     TAB_INIT( p_sys->i_images, p_sys->pp_images );
  96
  97     /* USF subtitles are mandated to be UTF-8, so don't need vlc_iconv */
  98
  99     var_Create( p_dec, "subsdec-align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 100     var_Get( p_dec, "subsdec-align", &val );
 101     p_sys->i_align = val.i_int;
 102
 103     ParseImageAttachments( p_dec );
 104
 105     if( var_CreateGetBool( p_dec, "subsdec-formatted" ) )
 106     {
 107         if( p_dec->fmt_in.i_extra > 0 )
 108             ParseUSFHeader( p_dec );
 109     }
 110
 111     return VLC_SUCCESS;
 112 }
 113
 114 /****************************************************************************
 115  * DecodeBlock: the whole thing
 116  ****************************************************************************
 117  * This function must be fed with complete subtitles units.
 118  ****************************************************************************/
 119 static subpicture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 120 {
 121     subpicture_t *p_spu;
 122     block_t *p_block;
 123
 124     if( !pp_block || *pp_block == NULL )
 125         return NULL;
 126
 127     p_block = *pp_block;
 128     if( p_block->i_rate != 0 )
 129         p_block->i_length = p_block->i_length * p_block->i_rate / INPUT_RATE_DEFAULT;
 130
 131     p_spu = ParseText( p_dec, p_block );
 132
 133     block_Release( p_block );
 134     *pp_block = NULL;
 135
 136     return p_spu;
 137 }
 138
 139 /*****************************************************************************
 140  * CloseDecoder: clean up the decoder
 141  *****************************************************************************/
 142 static void CloseDecoder( vlc_object_t *p_this )
 143 {
 144     decoder_t *p_dec = (decoder_t *)p_this;
 145     decoder_sys_t *p_sys = p_dec->p_sys;
 146
 147     if( p_sys->pp_ssa_styles )
 148     {
 149         int i;
 150         for( i = 0; i < p_sys->i_ssa_styles; i++ )
 151         {
 152             if( !p_sys->pp_ssa_styles[i] )
 153                 continue;
 154
 155             free( p_sys->pp_ssa_styles[i]->psz_stylename );
 156             free( p_sys->pp_ssa_styles[i]->font_style.psz_fontname );
 157             free( p_sys->pp_ssa_styles[i] );
 158         }
 159         TAB_CLEAN( p_sys->i_ssa_styles, p_sys->pp_ssa_styles );
 160     }
 161     if( p_sys->pp_images )
 162     {
 163         int i;
 164         for( i = 0; i < p_sys->i_images; i++ )
 165         {
 166             if( !p_sys->pp_images[i] )
 167                 continue;
 168
 169             if( p_sys->pp_images[i]->p_pic )
 170                 picture_Release( p_sys->pp_images[i]->p_pic );
 171             free( p_sys->pp_images[i]->psz_filename );
 172
 173             free( p_sys->pp_images[i] );
 174         }
 175         TAB_CLEAN( p_sys->i_images, p_sys->pp_images );
 176     }
 177
 178     free( p_sys );
 179 }
 180
 181 /*****************************************************************************
 182  * ParseText: parse an text subtitle packet and send it to the video output
 183  *****************************************************************************/
 184 static subpicture_t *ParseText( decoder_t *p_dec, block_t *p_block )
 185 {
 186     decoder_sys_t *p_sys = p_dec->p_sys;
 187     subpicture_t *p_spu = NULL;
 188     char *psz_subtitle = NULL;
 189
 190     /* We cannot display a subpicture with no date */
 191     if( p_block->i_pts == 0 )
 192     {
 193         msg_Warn( p_dec, "subtitle without a date" );
 194         return NULL;
 195     }
 196
 197     /* Check validity of packet data */
 198     /* An "empty" line containing only \0 can be used to force
 199        and ephemer picture from the screen */
 200     if( p_block->i_buffer < 1 )
 201     {
 202         msg_Warn( p_dec, "no subtitle data" );
 203         return NULL;
 204     }
 205
 206     /* Should be resiliant against bad subtitles */
 207     psz_subtitle = strndup( (const char *)p_block->p_buffer,
 208                             p_block->i_buffer );
 209     if( psz_subtitle == NULL )
 210         return NULL;
 211
 212     /* USF Subtitles are mandated to be UTF-8 -- make sure it is */
 213     if (EnsureUTF8( psz_subtitle ) == NULL)
 214     {
 215         msg_Err( p_dec, _("USF subtitles must be in UTF-8 format.\n"
 216                  "This stream contains USF subtitles which aren't.") );
 217     }
 218
 219     /* Create the subpicture unit */
 220     p_spu = p_dec->pf_spu_buffer_new( p_dec );
 221     if( !p_spu )
 222     {
 223         msg_Warn( p_dec, "can't get spu buffer" );
 224         free( psz_subtitle );
 225         return NULL;
 226     }
 227
 228     p_spu->b_pausable = true;
 229
 230     /* Decode USF strings */
 231     p_spu->p_region = ParseUSFString( p_dec, psz_subtitle, p_spu );
 232
 233     p_spu->i_start = p_block->i_pts;
 234     p_spu->i_stop = p_block->i_pts + p_block->i_length;
 235     p_spu->b_ephemer = (p_block->i_length == 0);
 236     p_spu->b_absolute = false;
 237     p_spu->i_original_picture_width = p_sys->i_original_width;
 238     p_spu->i_original_picture_height = p_sys->i_original_height;
 239
 240     free( psz_subtitle );
 241
 242     return p_spu;
 243 }
 244
 245 static char *GrabAttributeValue( const char *psz_attribute,
 246                                  const char *psz_tag_start )
 247 {
 248     if( psz_attribute && psz_tag_start )
 249     {
 250         char *psz_tag_end = strchr( psz_tag_start, '>' );
 251         char *psz_found   = strcasestr( psz_tag_start, psz_attribute );
 252
 253         if( psz_found )
 254         {
 255             psz_found += strlen( psz_attribute );
 256
 257             if(( *(psz_found++) == '=' ) &&
 258                ( *(psz_found++) == '\"' ))
 259             {
 260                 if( psz_found < psz_tag_end )
 261                 {
 262                     int   i_len = strcspn( psz_found, "\"" );
 263                     return strndup( psz_found, i_len );
 264                 }
 265             }
 266         }
 267     }
 268     return NULL;
 269 }
 270
 271 static ssa_style_t *ParseStyle( decoder_sys_t *p_sys, char *psz_subtitle )
 272 {
 273     ssa_style_t *p_style   = NULL;
 274     char        *psz_style = GrabAttributeValue( "style", psz_subtitle );
 275
 276     if( psz_style )
 277     {
 278         int i;
 279
 280         for( i = 0; i < p_sys->i_ssa_styles; i++ )
 281         {
 282             if( !strcmp( p_sys->pp_ssa_styles[i]->psz_stylename, psz_style ) )
 283                 p_style = p_sys->pp_ssa_styles[i];
 284         }
 285         free( psz_style );
 286     }
 287     return p_style;
 288 }
 289
 290 static int ParsePositionAttributeList( char *psz_subtitle, int *i_align,
 291                                        int *i_x, int *i_y )
 292 {
 293     int   i_mask = 0;
 294
 295     char *psz_align    = GrabAttributeValue( "alignment", psz_subtitle );
 296     char *psz_margin_x = GrabAttributeValue( "horizontal-margin", psz_subtitle );
 297     char *psz_margin_y = GrabAttributeValue( "vertical-margin", psz_subtitle );
 298     /* -- UNSUPPORTED
 299     char *psz_relative = GrabAttributeValue( "relative-to", psz_subtitle );
 300     char *psz_rotate_x = GrabAttributeValue( "rotate-x", psz_subtitle );
 301     char *psz_rotate_y = GrabAttributeValue( "rotate-y", psz_subtitle );
 302     char *psz_rotate_z = GrabAttributeValue( "rotate-z", psz_subtitle );
 303     */
 304
 305     *i_align = SUBPICTURE_ALIGN_BOTTOM;
 306     *i_x = 0;
 307     *i_y = 0;
 308
 309     if( psz_align )
 310     {
 311         if( !strcasecmp( "TopLeft", psz_align ) )
 312             *i_align = SUBPICTURE_ALIGN_TOP | SUBPICTURE_ALIGN_LEFT;
 313         else if( !strcasecmp( "TopCenter", psz_align ) )
 314             *i_align = SUBPICTURE_ALIGN_TOP;
 315         else if( !strcasecmp( "TopRight", psz_align ) )
 316             *i_align = SUBPICTURE_ALIGN_TOP | SUBPICTURE_ALIGN_RIGHT;
 317         else if( !strcasecmp( "MiddleLeft", psz_align ) )
 318             *i_align = SUBPICTURE_ALIGN_LEFT;
 319         else if( !strcasecmp( "MiddleCenter", psz_align ) )
 320             *i_align = 0;
 321         else if( !strcasecmp( "MiddleRight", psz_align ) )
 322             *i_align = SUBPICTURE_ALIGN_RIGHT;
 323         else if( !strcasecmp( "BottomLeft", psz_align ) )
 324             *i_align = SUBPICTURE_ALIGN_BOTTOM | SUBPICTURE_ALIGN_LEFT;
 325         else if( !strcasecmp( "BottomCenter", psz_align ) )
 326             *i_align = SUBPICTURE_ALIGN_BOTTOM;
 327         else if( !strcasecmp( "BottomRight", psz_align ) )
 328             *i_align = SUBPICTURE_ALIGN_BOTTOM | SUBPICTURE_ALIGN_RIGHT;
 329
 330         i_mask |= ATTRIBUTE_ALIGNMENT;
 331         free( psz_align );
 332     }
 333     if( psz_margin_x )
 334     {
 335         *i_x = atoi( psz_margin_x );
 336         if( strchr( psz_margin_x, '%' ) )
 337             i_mask |= ATTRIBUTE_X_PERCENT;
 338         else
 339             i_mask |= ATTRIBUTE_X;
 340
 341         free( psz_margin_x );
 342     }
 343     if( psz_margin_y )
 344     {
 345         *i_y = atoi( psz_margin_y );
 346         if( strchr( psz_margin_y, '%' ) )
 347             i_mask |= ATTRIBUTE_Y_PERCENT;
 348         else
 349             i_mask |= ATTRIBUTE_Y;
 350
 351         free( psz_margin_y );
 352     }
 353     return i_mask;
 354 }
 355
 356 static void SetupPositions( subpicture_region_t *p_region, char *psz_subtitle )
 357 {
 358     int           i_mask = 0;
 359     int           i_align;
 360     int           i_x, i_y;
 361
 362     i_mask = ParsePositionAttributeList( psz_subtitle, &i_align, &i_x, &i_y );
 363
 364     if( i_mask & ATTRIBUTE_ALIGNMENT )
 365         p_region->i_align = i_align;
 366
 367     /* TODO: Setup % based offsets properly, without adversely affecting
 368      *       everything else in vlc. Will address with separate patch, to
 369      *       prevent this one being any more complicated.
 370      */
 371     if( i_mask & ATTRIBUTE_X )
 372         p_region->i_x = i_x;
 373     else if( i_mask & ATTRIBUTE_X_PERCENT )
 374         p_region->i_x = 0;
 375
 376     if( i_mask & ATTRIBUTE_Y )
 377         p_region->i_y = i_y;
 378     else if( i_mask & ATTRIBUTE_Y_PERCENT )
 379         p_region->i_y = 0;
 380 }
 381
 382 static subpicture_region_t *CreateTextRegion( decoder_t *p_dec,
 383                                               subpicture_t *p_spu,
 384                                               char *psz_subtitle,
 385                                               int i_len,
 386                                               int i_sys_align )
 387 {
 388     decoder_sys_t        *p_sys = p_dec->p_sys;
 389     subpicture_region_t  *p_text_region;
 390     video_format_t        fmt;
 391
 392     /* Create a new subpicture region */
 393     memset( &fmt, 0, sizeof(video_format_t) );
 394     fmt.i_chroma = VLC_FOURCC('T','E','X','T');
 395     fmt.i_aspect = 0;
 396     fmt.i_width = fmt.i_height = 0;
 397     fmt.i_x_offset = fmt.i_y_offset = 0;
 398     p_text_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
 399
 400     if( p_text_region != NULL )
 401     {
 402         ssa_style_t  *p_style = NULL;
 403
 404         p_text_region->psz_text = NULL;
 405         p_text_region->psz_html = strndup( psz_subtitle, i_len );
 406         if( ! p_text_region->psz_html )
 407         {
 408             p_spu->pf_destroy_region( VLC_OBJECT(p_dec), p_text_region );
 409             return NULL;
 410         }
 411
 412         p_style = ParseStyle( p_sys, p_text_region->psz_html );
 413         if( !p_style )
 414         {
 415             int i;
 416
 417             for( i = 0; i < p_sys->i_ssa_styles; i++ )
 418             {
 419                 if( !strcasecmp( p_sys->pp_ssa_styles[i]->psz_stylename, "Default" ) )
 420                     p_style = p_sys->pp_ssa_styles[i];
 421             }
 422         }
 423
 424         if( p_style )
 425         {
 426             msg_Dbg( p_dec, "style is: %s", p_style->psz_stylename );
 427
 428             p_text_region->p_style = &p_style->font_style;
 429             p_text_region->i_align = p_style->i_align;
 430
 431             /* TODO: Setup % based offsets properly, without adversely affecting
 432              *       everything else in vlc. Will address with separate patch,
 433              *       to prevent this one being any more complicated.
 434
 435                      * p_style->i_margin_percent_h;
 436                      * p_style->i_margin_percent_v;
 437              */
 438             p_text_region->i_x         = p_style->i_margin_h;
 439             p_text_region->i_y         = p_style->i_margin_v;
 440
 441         }
 442         else
 443         {
 444             p_text_region->i_align = SUBPICTURE_ALIGN_BOTTOM | i_sys_align;
 445             p_text_region->i_x = i_sys_align ? 20 : 0;
 446             p_text_region->i_y = 10;
 447         }
 448         /* Look for position arguments which may override the style-based
 449          * defaults.
 450          */
 451         SetupPositions( p_text_region, psz_subtitle );
 452
 453         p_text_region->p_next = NULL;
 454     }
 455     return p_text_region;
 456 }
 457
 458 static int ParseImageAttachments( decoder_t *p_dec )
 459 {
 460     decoder_sys_t        *p_sys = p_dec->p_sys;
 461     input_attachment_t  **pp_attachments;
 462     int                   i_attachments_cnt;
 463     int                   k = 0;
 464
 465     if( VLC_SUCCESS != decoder_GetInputAttachments( p_dec, &pp_attachments, &i_attachments_cnt ))
 466         return VLC_EGENERIC;
 467
 468     for( k = 0; k < i_attachments_cnt; k++ )
 469     {
 470         input_attachment_t *p_attach = pp_attachments[k];
 471
 472         vlc_fourcc_t  type  = 0;
 473
 474         if( ( !strcmp( p_attach->psz_mime, "image/bmp" ) )      || /* BMP */
 475             ( !strcmp( p_attach->psz_mime, "image/x-bmp" ) )    ||
 476             ( !strcmp( p_attach->psz_mime, "image/x-bitmap" ) ) ||
 477             ( !strcmp( p_attach->psz_mime, "image/x-ms-bmp" ) ) )
 478         {
 479              type = VLC_FOURCC('b','m','p',' ');
 480         }
 481         else if( ( !strcmp( p_attach->psz_mime, "image/x-portable-anymap" ) )  || /* PNM */
 482                  ( !strcmp( p_attach->psz_mime, "image/x-portable-bitmap" ) )  || /* PBM */
 483                  ( !strcmp( p_attach->psz_mime, "image/x-portable-graymap" ) ) || /* PGM */
 484                  ( !strcmp( p_attach->psz_mime, "image/x-portable-pixmap" ) ) )   /* PPM */
 485         {
 486             type = VLC_FOURCC('p','n','m',' ');
 487         }
 488         else if ( !strcmp( p_attach->psz_mime, "image/gif" ) )         /* GIF */
 489             type = VLC_FOURCC('g','i','f',' ');
 490         else if ( !strcmp( p_attach->psz_mime, "image/jpeg" ) )        /* JPG, JPEG */
 491             type = VLC_FOURCC('j','p','e','g');
 492         else if ( !strcmp( p_attach->psz_mime, "image/pcx" ) )         /* PCX */
 493             type = VLC_FOURCC('p','c','x',' ');
 494         else if ( !strcmp( p_attach->psz_mime, "image/png" ) )         /* PNG */
 495             type = VLC_FOURCC('p','n','g',' ');
 496         else if ( !strcmp( p_attach->psz_mime, "image/tiff" ) )        /* TIF, TIFF */
 497             type = VLC_FOURCC('t','i','f','f');
 498         else if ( !strcmp( p_attach->psz_mime, "image/x-tga" ) )       /* TGA */
 499             type = VLC_FOURCC('t','g','a',' ');
 500         else if ( !strcmp( p_attach->psz_mime, "image/x-xpixmap") )    /* XPM */
 501             type = VLC_FOURCC('x','p','m',' ');
 502
 503         if( ( type != 0 ) &&
 504             ( p_attach->i_data > 0 ) &&
 505             ( p_attach->p_data != NULL ) )
 506         {
 507             picture_t         *p_pic = NULL;
 508             image_handler_t   *p_image;
 509
 510             p_image = image_HandlerCreate( p_dec );
 511             if( p_image != NULL )
 512             {
 513                 block_t   *p_block;
 514
 515                 p_block = block_New( p_image->p_parent, p_attach->i_data );
 516
 517                 if( p_block != NULL )
 518                 {
 519                     video_format_t     fmt_in;
 520                     video_format_t     fmt_out;
 521
 522                     memcpy( p_block->p_buffer, p_attach->p_data, p_attach->i_data );
 523
 524                     memset( &fmt_in,  0, sizeof( video_format_t));
 525                     memset( &fmt_out, 0, sizeof( video_format_t));
 526
 527                     fmt_in.i_chroma  = type;
 528                     fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 529
 530                     /* Find a suitable decoder module */
 531                     if( module_Exists( p_dec, "sdl_image" ) )
 532                     {
 533                         /* ffmpeg thinks it can handle bmp properly but it can't (at least
 534                          * not all of them), so use sdl_image if it is available */
 535
 536                         vlc_value_t val;
 537
 538                         var_Create( p_dec, "codec", VLC_VAR_MODULE | VLC_VAR_DOINHERIT );
 539                         val.psz_string = (char*) "sdl_image";
 540                         var_Set( p_dec, "codec", val );
 541                     }
 542
 543                     p_pic = image_Read( p_image, p_block, &fmt_in, &fmt_out );
 544                     var_Destroy( p_dec, "codec" );
 545                 }
 546
 547                 image_HandlerDelete( p_image );
 548             }
 549             if( p_pic )
 550             {
 551                 image_attach_t *p_picture = malloc( sizeof(image_attach_t) );
 552
 553                 if( p_picture )
 554                 {
 555                     p_picture->psz_filename = strdup( p_attach->psz_name );
 556                     p_picture->p_pic = p_pic;
 557
 558                     TAB_APPEND( p_sys->i_images, p_sys->pp_images, p_picture );
 559                 }
 560             }
 561         }
 562         vlc_input_attachment_Delete( pp_attachments[ k ] );
 563     }
 564     free( pp_attachments );
 565
 566     return VLC_SUCCESS;
 567 }
 568
 569 static void ParseUSFHeaderTags( decoder_t *p_dec, xml_reader_t *p_xml_reader )
 570 {
 571     decoder_sys_t *p_sys = p_dec->p_sys;
 572     char *psz_node;
 573     ssa_style_t *p_style = NULL;
 574     int i_style_level = 0;
 575     int i_metadata_level = 0;
 576
 577     while ( xml_ReaderRead( p_xml_reader ) == 1 )
 578     {
 579         switch ( xml_ReaderNodeType( p_xml_reader ) )
 580         {
 581             case XML_READER_TEXT:
 582             case XML_READER_NONE:
 583                 break;
 584             case XML_READER_ENDELEM:
 585                 psz_node = xml_ReaderName( p_xml_reader );
 586
 587                 if( !psz_node )
 588                     break;
 589                 switch (i_style_level)
 590                 {
 591                     case 0:
 592                         if( !strcasecmp( "metadata", psz_node ) && (i_metadata_level == 1) )
 593                         {
 594                             i_metadata_level--;
 595                         }
 596                         break;
 597                     case 1:
 598                         if( !strcasecmp( "styles", psz_node ) )
 599                         {
 600                             i_style_level--;
 601                         }
 602                         break;
 603                     case 2:
 604                         if( !strcasecmp( "style", psz_node ) )
 605                         {
 606                             TAB_APPEND( p_sys->i_ssa_styles, p_sys->pp_ssa_styles, p_style );
 607
 608                             p_style = NULL;
 609                             i_style_level--;
 610                         }
 611                         break;
 612                 }
 613
 614                 free( psz_node );
 615                 break;
 616             case XML_READER_STARTELEM:
 617                 psz_node = xml_ReaderName( p_xml_reader );
 618
 619                 if( !psz_node )
 620                     break;
 621
 622                 if( !strcasecmp( "metadata", psz_node ) && (i_style_level == 0) )
 623                 {
 624                     i_metadata_level++;
 625                 }
 626                 else if( !strcasecmp( "resolution", psz_node ) &&
 627                          ( i_metadata_level == 1) )
 628                 {
 629                     while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 630                     {
 631                         char *psz_name = xml_ReaderName ( p_xml_reader );
 632                         char *psz_value = xml_ReaderValue ( p_xml_reader );
 633
 634                         if( psz_name && psz_value )
 635                         {
 636                             if( !strcasecmp( "x", psz_name ) )
 637                                 p_sys->i_original_width = atoi( psz_value );
 638                             else if( !strcasecmp( "y", psz_name ) )
 639                                 p_sys->i_original_height = atoi( psz_value );
 640                         }
 641                         free( psz_name );
 642                         free( psz_value );
 643                     }
 644                 }
 645                 else if( !strcasecmp( "styles", psz_node ) && (i_style_level == 0) )
 646                 {
 647                     i_style_level++;
 648                 }
 649                 else if( !strcasecmp( "style", psz_node ) && (i_style_level == 1) )
 650                 {
 651                     i_style_level++;
 652
 653                     p_style = calloc( 1, sizeof(ssa_style_t) );
 654                     if( ! p_style )
 655                     {
 656                         free( psz_node );
 657                         break;
 658                     }
 659                     /* All styles are supposed to default to Default, and then
 660                      * one or more settings are over-ridden.
 661                      * At the moment this only effects styles defined AFTER
 662                      * Default in the XML
 663                      */
 664                     int i;
 665                     for( i = 0; i < p_sys->i_ssa_styles; i++ )
 666                     {
 667                         if( !strcasecmp( p_sys->pp_ssa_styles[i]->psz_stylename, "Default" ) )
 668                         {
 669                             ssa_style_t *p_default_style = p_sys->pp_ssa_styles[i];
 670
 671                             memcpy( p_style, p_default_style, sizeof( ssa_style_t ) );
 672                             p_style->font_style.psz_fontname = strdup( p_style->font_style.psz_fontname );
 673                             p_style->psz_stylename = NULL;
 674                         }
 675                     }
 676
 677                     while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 678                     {
 679                         char *psz_name = xml_ReaderName ( p_xml_reader );
 680                         char *psz_value = xml_ReaderValue ( p_xml_reader );
 681
 682                         if( psz_name && psz_value )
 683                         {
 684                             if( !strcasecmp( "name", psz_name ) )
 685                                 p_style->psz_stylename = strdup( psz_value);
 686                         }
 687                         free( psz_name );
 688                         free( psz_value );
 689                     }
 690                 }
 691                 else if( !strcasecmp( "fontstyle", psz_node ) && (i_style_level == 2) )
 692                 {
 693                     while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 694                     {
 695                         char *psz_name = xml_ReaderName ( p_xml_reader );
 696                         char *psz_value = xml_ReaderValue ( p_xml_reader );
 697
 698                         if( psz_name && psz_value )
 699                         {
 700                             if( !strcasecmp( "face", psz_name ) )
 701                             {
 702                                 free( p_style->font_style.psz_fontname );
 703                                 p_style->font_style.psz_fontname = strdup( psz_value );
 704                             }
 705                             else if( !strcasecmp( "size", psz_name ) )
 706                             {
 707                                 if( ( *psz_value == '+' ) || ( *psz_value == '-' ) )
 708                                 {
 709                                     int i_value = atoi( psz_value );
 710
 711                                     if( ( i_value >= -5 ) && ( i_value <= 5 ) )
 712                                         p_style->font_style.i_font_size  +=
 713                                             ( i_value * p_style->font_style.i_font_size ) / 10;
 714                                     else if( i_value < -5 )
 715                                         p_style->font_style.i_font_size  = - i_value;
 716                                     else if( i_value > 5 )
 717                                         p_style->font_style.i_font_size  = i_value;
 718                                 }
 719                                 else
 720                                     p_style->font_style.i_font_size  = atoi( psz_value );
 721                             }
 722                             else if( !strcasecmp( "italic", psz_name ) )
 723                             {
 724                                 if( !strcasecmp( "yes", psz_value ))
 725                                     p_style->font_style.i_style_flags |= STYLE_ITALIC;
 726                                 else
 727                                     p_style->font_style.i_style_flags &= ~STYLE_ITALIC;
 728                             }
 729                             else if( !strcasecmp( "weight", psz_name ) )
 730                             {
 731                                 if( !strcasecmp( "bold", psz_value ))
 732                                     p_style->font_style.i_style_flags |= STYLE_BOLD;
 733                                 else
 734                                     p_style->font_style.i_style_flags &= ~STYLE_BOLD;
 735                             }
 736                             else if( !strcasecmp( "underline", psz_name ) )
 737                             {
 738                                 if( !strcasecmp( "yes", psz_value ))
 739                                     p_style->font_style.i_style_flags |= STYLE_UNDERLINE;
 740                                 else
 741                                     p_style->font_style.i_style_flags &= ~STYLE_UNDERLINE;
 742                             }
 743                             else if( !strcasecmp( "color", psz_name ) )
 744                             {
 745                                 if( *psz_value == '#' )
 746                                 {
 747                                     unsigned long col = strtol(psz_value+1, NULL, 16);
 748                                     p_style->font_style.i_font_color = (col & 0x00ffffff);
 749                                     p_style->font_style.i_font_alpha = (col >> 24) & 0xff;
 750                                 }
 751                             }
 752                             else if( !strcasecmp( "outline-color", psz_name ) )
 753                             {
 754                                 if( *psz_value == '#' )
 755                                 {
 756                                     unsigned long col = strtol(psz_value+1, NULL, 16);
 757                                     p_style->font_style.i_outline_color = (col & 0x00ffffff);
 758                                     p_style->font_style.i_outline_alpha = (col >> 24) & 0xff;
 759                                 }
 760                             }
 761                             else if( !strcasecmp( "outline-level", psz_name ) )
 762                             {
 763                                 p_style->font_style.i_outline_width = atoi( psz_value );
 764                             }
 765                             else if( !strcasecmp( "shadow-color", psz_name ) )
 766                             {
 767                                 if( *psz_value == '#' )
 768                                 {
 769                                     unsigned long col = strtol(psz_value+1, NULL, 16);
 770                                     p_style->font_style.i_shadow_color = (col & 0x00ffffff);
 771                                     p_style->font_style.i_shadow_alpha = (col >> 24) & 0xff;
 772                                 }
 773                             }
 774                             else if( !strcasecmp( "shadow-level", psz_name ) )
 775                             {
 776                                 p_style->font_style.i_shadow_width = atoi( psz_value );
 777                             }
 778                             else if( !strcasecmp( "back-color", psz_name ) )
 779                             {
 780                                 if( *psz_value == '#' )
 781                                 {
 782                                     unsigned long col = strtol(psz_value+1, NULL, 16);
 783                                     p_style->font_style.i_karaoke_background_color = (col & 0x00ffffff);
 784                                     p_style->font_style.i_karaoke_background_alpha = (col >> 24) & 0xff;
 785                                 }
 786                             }
 787                             else if( !strcasecmp( "spacing", psz_name ) )
 788                             {
 789                                 p_style->font_style.i_spacing = atoi( psz_value );
 790                             }
 791                         }
 792                         free( psz_name );
 793                         free( psz_value );
 794                     }
 795                 }
 796                 else if( !strcasecmp( "position", psz_node ) && (i_style_level == 2) )
 797                 {
 798                     while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 799                     {
 800                         char *psz_name = xml_ReaderName ( p_xml_reader );
 801                         char *psz_value = xml_ReaderValue ( p_xml_reader );
 802
 803                         if( psz_name && psz_value )
 804                         {
 805                             if( !strcasecmp( "alignment", psz_name ) )
 806                             {
 807                                 if( !strcasecmp( "TopLeft", psz_value ) )
 808                                     p_style->i_align = SUBPICTURE_ALIGN_TOP | SUBPICTURE_ALIGN_LEFT;
 809                                 else if( !strcasecmp( "TopCenter", psz_value ) )
 810                                     p_style->i_align = SUBPICTURE_ALIGN_TOP;
 811                                 else if( !strcasecmp( "TopRight", psz_value ) )
 812                                     p_style->i_align = SUBPICTURE_ALIGN_TOP | SUBPICTURE_ALIGN_RIGHT;
 813                                 else if( !strcasecmp( "MiddleLeft", psz_value ) )
 814                                     p_style->i_align = SUBPICTURE_ALIGN_LEFT;
 815                                 else if( !strcasecmp( "MiddleCenter", psz_value ) )
 816                                     p_style->i_align = 0;
 817                                 else if( !strcasecmp( "MiddleRight", psz_value ) )
 818                                     p_style->i_align = SUBPICTURE_ALIGN_RIGHT;
 819                                 else if( !strcasecmp( "BottomLeft", psz_value ) )
 820                                     p_style->i_align = SUBPICTURE_ALIGN_BOTTOM | SUBPICTURE_ALIGN_LEFT;
 821                                 else if( !strcasecmp( "BottomCenter", psz_value ) )
 822                                     p_style->i_align = SUBPICTURE_ALIGN_BOTTOM;
 823                                 else if( !strcasecmp( "BottomRight", psz_value ) )
 824                                     p_style->i_align = SUBPICTURE_ALIGN_BOTTOM | SUBPICTURE_ALIGN_RIGHT;
 825                             }
 826                             else if( !strcasecmp( "horizontal-margin", psz_name ) )
 827                             {
 828                                 if( strchr( psz_value, '%' ) )
 829                                 {
 830                                     p_style->i_margin_h = 0;
 831                                     p_style->i_margin_percent_h = atoi( psz_value );
 832                                 }
 833                                 else
 834                                 {
 835                                     p_style->i_margin_h = atoi( psz_value );
 836                                     p_style->i_margin_percent_h = 0;
 837                                 }
 838                             }
 839                             else if( !strcasecmp( "vertical-margin", psz_name ) )
 840                             {
 841                                 if( strchr( psz_value, '%' ) )
 842                                 {
 843                                     p_style->i_margin_v = 0;
 844                                     p_style->i_margin_percent_v = atoi( psz_value );
 845                                 }
 846                                 else
 847                                 {
 848                                     p_style->i_margin_v = atoi( psz_value );
 849                                     p_style->i_margin_percent_v = 0;
 850                                 }
 851                             }
 852                         }
 853                         free( psz_name );
 854                         free( psz_value );
 855                     }
 856                 }
 857
 858                 free( psz_node );
 859                 break;
 860         }
 861     }
 862     free( p_style );
 863 }
 864
 865
 866
 867 static subpicture_region_t *ParseUSFString( decoder_t *p_dec,
 868                                             char *psz_subtitle,
 869                                             subpicture_t *p_spu_in )
 870 {
 871     decoder_sys_t        *p_sys = p_dec->p_sys;
 872     subpicture_t         *p_spu = p_spu_in;
 873     subpicture_region_t  *p_region_first = NULL;
 874     subpicture_region_t  *p_region_upto  = p_region_first;
 875
 876     while( *psz_subtitle )
 877     {
 878         if( *psz_subtitle == '<' )
 879         {
 880             char *psz_end = NULL;
 881
 882             if(( !strncasecmp( psz_subtitle, "<text ", 6 )) ||
 883                ( !strncasecmp( psz_subtitle, "<text>", 6 )))
 884             {
 885                 psz_end = strcasestr( psz_subtitle, "</text>" );
 886
 887                 if( psz_end )
 888                 {
 889                     subpicture_region_t  *p_text_region;
 890
 891                     psz_end += strcspn( psz_end, ">" ) + 1;
 892
 893                     p_text_region = CreateTextRegion( p_dec,
 894                                                       p_spu,
 895                                                       psz_subtitle,
 896                                                       psz_end - psz_subtitle,
 897                                                       p_sys->i_align );
 898
 899                     if( p_text_region )
 900                     {
 901                         p_text_region->psz_text = CreatePlainText( p_text_region->psz_html );
 902
 903                         if( ! var_CreateGetBool( p_dec, "subsdec-formatted" ) )
 904                         {
 905                             free( p_text_region->psz_html );
 906                             p_text_region->psz_html = NULL;
 907                         }
 908                     }
 909
 910                     if( !p_region_first )
 911                     {
 912                         p_region_first = p_region_upto = p_text_region;
 913                     }
 914                     else if( p_text_region )
 915                     {
 916                         p_region_upto->p_next = p_text_region;
 917                         p_region_upto = p_region_upto->p_next;
 918                     }
 919                 }
 920             }
 921             else if(( !strncasecmp( psz_subtitle, "<karaoke ", 9 )) ||
 922                     ( !strncasecmp( psz_subtitle, "<karaoke>", 9 )))
 923             {
 924                 psz_end = strcasestr( psz_subtitle, "</karaoke>" );
 925
 926                 if( psz_end )
 927                 {
 928                     subpicture_region_t  *p_text_region;
 929
 930                     psz_end += strcspn( psz_end, ">" ) + 1;
 931
 932                     p_text_region = CreateTextRegion( p_dec,
 933                                                       p_spu,
 934                                                       psz_subtitle,
 935                                                       psz_end - psz_subtitle,
 936                                                       p_sys->i_align );
 937
 938                     if( p_text_region )
 939                     {
 940                         if( ! var_CreateGetBool( p_dec, "subsdec-formatted" ) )
 941                         {
 942                             free( p_text_region->psz_html );
 943                             p_text_region->psz_html = NULL;
 944                         }
 945                     }
 946                     if( !p_region_first )
 947                     {
 948                         p_region_first = p_region_upto = p_text_region;
 949                     }
 950                     else if( p_text_region )
 951                     {
 952                         p_region_upto->p_next = p_text_region;
 953                         p_region_upto = p_region_upto->p_next;
 954                     }
 955                 }
 956             }
 957             else if(( !strncasecmp( psz_subtitle, "<image ", 7 )) ||
 958                     ( !strncasecmp( psz_subtitle, "<image>", 7 )))
 959             {
 960                 subpicture_region_t *p_image_region = NULL;
 961
 962                 char *psz_end = strcasestr( psz_subtitle, "</image>" );
 963                 char *psz_content = strchr( psz_subtitle, '>' );
 964                 int   i_transparent = -1;
 965
 966                 /* If a colorkey parameter is specified, then we have to map
 967                  * that index in the picture through as transparent (it is
 968                  * required by the USF spec but is also recommended that if the
 969                  * creator really wants a transparent colour that they use a
 970                  * type like PNG that properly supports it; this goes doubly
 971                  * for VLC because the pictures are stored internally in YUV
 972                  * and the resulting colour-matching may not produce the
 973                  * desired results.)
 974                  */
 975                 char *psz_tmp = GrabAttributeValue( "colorkey", psz_subtitle );
 976                 if( psz_tmp )
 977                 {
 978                     if( *psz_tmp == '#' )
 979                         i_transparent = strtol( psz_tmp + 1, NULL, 16 ) & 0x00ffffff;
 980                     free( psz_tmp );
 981                 }
 982                 if( psz_content && ( psz_content < psz_end ) )
 983                 {
 984                     char *psz_filename = strndup( &psz_content[1], psz_end - &psz_content[1] );
 985                     if( psz_filename )
 986                     {
 987                         p_image_region = LoadEmbeddedImage( p_dec, p_spu,
 988                                             psz_filename, i_transparent );
 989                         free( psz_filename );
 990                     }
 991                 }
 992
 993                 if( psz_end ) psz_end += strcspn( psz_end, ">" ) + 1;
 994
 995                 if( p_image_region )
 996                 {
 997                     SetupPositions( p_image_region, psz_subtitle );
 998
 999                     p_image_region->p_next   = NULL;
1000                     p_image_region->psz_text = NULL;
1001                     p_image_region->psz_html = NULL;
1002
1003                 }
1004                 if( !p_region_first )
1005                 {
1006                     p_region_first = p_region_upto = p_image_region;
1007                 }
1008                 else if( p_image_region )
1009                 {
1010                     p_region_upto->p_next = p_image_region;
1011                     p_region_upto = p_region_upto->p_next;
1012                 }
1013             }
1014             if( psz_end )
1015                 psz_subtitle = psz_end - 1;
1016
1017             psz_subtitle += strcspn( psz_subtitle, ">" );
1018         }
1019
1020         psz_subtitle++;
1021     }
1022
1023     return p_region_first;
1024 }
1025
1026 /*****************************************************************************
1027  * ParseUSFHeader: Retrieve global formatting information etc
1028  *****************************************************************************/
1029 static void ParseUSFHeader( decoder_t *p_dec )
1030 {
1031     stream_t      *p_sub = NULL;
1032     xml_t         *p_xml = NULL;
1033     xml_reader_t  *p_xml_reader = NULL;
1034
1035     p_sub = stream_MemoryNew( VLC_OBJECT(p_dec),
1036                               p_dec->fmt_in.p_extra,
1037                               p_dec->fmt_in.i_extra,
1038                               true );
1039     if( !p_sub )
1040         return;
1041
1042     p_xml = xml_Create( p_dec );
1043     if( p_xml )
1044     {
1045         p_xml_reader = xml_ReaderCreate( p_xml, p_sub );
1046         if( p_xml_reader )
1047         {
1048             /* Look for Root Node */
1049             if( xml_ReaderRead( p_xml_reader ) == 1 )
1050             {
1051                 char *psz_node = xml_ReaderName( p_xml_reader );
1052
1053                 if( !strcasecmp( "usfsubtitles", psz_node ) )
1054                     ParseUSFHeaderTags( p_dec, p_xml_reader );
1055
1056                 free( psz_node );
1057             }
1058
1059             xml_ReaderDelete( p_xml, p_xml_reader );
1060         }
1061         xml_Delete( p_xml );
1062     }
1063     stream_Delete( p_sub );
1064 }
1065
1066 /* Function now handles tags which has attribute values, and tries
1067  * to deal with &' commands too. It no longer modifies the string
1068  * in place, so that the original text can be reused
1069  */
1070 static char *StripTags( char *psz_subtitle )
1071 {
1072     char *psz_text_start;
1073     char *psz_text;
1074
1075     psz_text = psz_text_start = malloc( strlen( psz_subtitle ) + 1 );
1076     if( !psz_text_start )
1077         return NULL;
1078
1079     while( *psz_subtitle )
1080     {
1081         /* Mask out any pre-existing LFs in the subtitle */
1082         if( *psz_subtitle == '\n' )
1083             *psz_subtitle = ' ';
1084
1085         if( *psz_subtitle == '<' )
1086         {
1087             if( strncasecmp( psz_subtitle, "<br/>", 5 ) == 0 )
1088                 *psz_text++ = '\n';
1089
1090             psz_subtitle += strcspn( psz_subtitle, ">" );
1091         }
1092         else if( *psz_subtitle == '&' )
1093         {
1094             if( !strncasecmp( psz_subtitle, "&lt;", 4 ))
1095             {
1096                 *psz_text++ = '<';
1097                 psz_subtitle += strcspn( psz_subtitle, ";" );
1098             }
1099             else if( !strncasecmp( psz_subtitle, "&gt;", 4 ))
1100             {
1101                 *psz_text++ = '>';
1102                 psz_subtitle += strcspn( psz_subtitle, ";" );
1103             }
1104             else if( !strncasecmp( psz_subtitle, "&amp;", 5 ))
1105             {
1106                 *psz_text++ = '&';
1107                 psz_subtitle += strcspn( psz_subtitle, ";" );
1108             }
1109             else if( !strncasecmp( psz_subtitle, "&quot;", 6 ))
1110             {
1111                 *psz_text++ = '\"';
1112                 psz_subtitle += strcspn( psz_subtitle, ";" );
1113             }
1114             else
1115             {
1116                 /* Assume it is just a normal ampersand */
1117                 *psz_text++ = '&';
1118             }
1119         }
1120         else
1121         {
1122             *psz_text++ = *psz_subtitle;
1123         }
1124
1125         psz_subtitle++;
1126     }
1127     *psz_text = '\0';
1128     psz_text_start = realloc( psz_text_start, strlen( psz_text_start ) + 1 );
1129
1130     return psz_text_start;
1131 }
1132
1133 /* Turn a HTML subtitle, turn into a plain-text version,
1134  *  complete with sensible whitespace compaction
1135  */
1136
1137 static char *CreatePlainText( char *psz_subtitle )
1138 {
1139     char *psz_text = StripTags( psz_subtitle );
1140     char *s;
1141
1142     if( !psz_text )
1143         return NULL;
1144
1145     s = strpbrk( psz_text, "\t\r\n " );
1146     while( s )
1147     {
1148         int   k;
1149         char  spc = ' ';
1150         int   i_whitespace = strspn( s, "\t\r\n " );
1151
1152         /* Favour '\n' over other whitespaces - if one of these
1153          * occurs in the whitespace use a '\n' as our value,
1154          * otherwise just use a ' '
1155          */
1156         for( k = 0; k < i_whitespace; k++ )
1157             if( s[k] == '\n' ) spc = '\n';
1158
1159         if( i_whitespace > 1 )
1160         {
1161             memmove( &s[1],
1162                      &s[i_whitespace],
1163                      strlen( s ) - i_whitespace + 1 );
1164         }
1165         *s++ = spc;
1166
1167         s = strpbrk( s, "\t\r\n " );
1168     }
1169     return psz_text;
1170 }
1171
1172 /****************************************************************************
1173  * download and resize image located at psz_url
1174  ***************************************************************************/
1175 static subpicture_region_t *LoadEmbeddedImage( decoder_t *p_dec,
1176                                                subpicture_t *p_spu,
1177                                                const char *psz_filename,
1178                                                int i_transparent_color )
1179 {
1180     decoder_sys_t         *p_sys = p_dec->p_sys;
1181     subpicture_region_t   *p_region;
1182     video_format_t         fmt_out;
1183     int                    k;
1184     picture_t             *p_pic = NULL;
1185
1186     for( k = 0; k < p_sys->i_images; k++ )
1187     {
1188         if( p_sys->pp_images &&
1189             !strcmp( p_sys->pp_images[k]->psz_filename, psz_filename ) )
1190         {
1191             p_pic = p_sys->pp_images[k]->p_pic;
1192             break;
1193         }
1194     }
1195
1196     if( !p_pic )
1197     {
1198         msg_Err( p_dec, "Unable to read image %s", psz_filename );
1199         return NULL;
1200     }
1201
1202     /* Display the feed's image */
1203     memset( &fmt_out, 0, sizeof( video_format_t));
1204
1205     fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
1206     fmt_out.i_aspect = VOUT_ASPECT_FACTOR;
1207     fmt_out.i_sar_num = fmt_out.i_sar_den = 1;
1208     fmt_out.i_width =
1209         fmt_out.i_visible_width = p_pic->p[Y_PLANE].i_visible_pitch;
1210     fmt_out.i_height =
1211         fmt_out.i_visible_height = p_pic->p[Y_PLANE].i_visible_lines;
1212
1213     p_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt_out );
1214     if( !p_region )
1215     {
1216         msg_Err( p_dec, "cannot allocate SPU region" );
1217         return NULL;
1218     }
1219     vout_CopyPicture( p_dec, &p_region->picture, p_pic );
1220
1221     /* This isn't the best way to do this - if you really want transparency, then
1222      * you're much better off using an image type that supports it like PNG. The
1223      * spec requires this support though.
1224      */
1225     if( i_transparent_color > 0 )
1226     {
1227         uint8_t i_r = ( i_transparent_color >> 16 ) & 0xff;
1228         uint8_t i_g = ( i_transparent_color >>  8 ) & 0xff;
1229         uint8_t i_b = ( i_transparent_color       ) & 0xff;
1230         uint8_t i_y = ( ( (  66 * i_r + 129 * i_g +  25 * i_b + 128 ) >> 8 ) + 16 );
1231         uint8_t i_u =   ( ( -38 * i_r -  74 * i_g + 112 * i_b + 128 ) >> 8 ) + 128 ;
1232         uint8_t i_v =   ( ( 112 * i_r -  94 * i_g -  18 * i_b + 128 ) >> 8 ) + 128 ;
1233
1234         if( ( p_region->picture.Y_PITCH == p_region->picture.U_PITCH ) &&
1235             ( p_region->picture.Y_PITCH == p_region->picture.V_PITCH ) &&
1236             ( p_region->picture.Y_PITCH == p_region->picture.A_PITCH ) )
1237         {
1238             int i_lines = p_region->picture.p[ Y_PLANE ].i_lines;
1239             if( i_lines > p_region->picture.p[ U_PLANE ].i_lines )
1240                 i_lines = p_region->picture.p[ U_PLANE ].i_lines;
1241             if( i_lines > p_region->picture.p[ V_PLANE ].i_lines )
1242                 i_lines = p_region->picture.p[ V_PLANE ].i_lines;
1243             if( i_lines > p_region->picture.p[ A_PLANE ].i_lines )
1244                 i_lines = p_region->picture.p[ A_PLANE ].i_lines;
1245
1246             int   i;
1247
1248             for( i = 0; i < p_region->picture.A_PITCH * i_lines; i++ )
1249             {
1250                 if(( p_region->picture.Y_PIXELS[ i ] == i_y ) &&
1251                    ( p_region->picture.U_PIXELS[ i ] == i_u ) &&
1252                    ( p_region->picture.V_PIXELS[ i ] == i_v ) )
1253                 {
1254                     p_region->picture.A_PIXELS[ i ] = 1;
1255                 }
1256             }
1257         }
1258     }
1259     return p_region;
1260 }