modules/spu/logo.c

   1 /*****************************************************************************
   2  * logo.c : logo video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2003-2006 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *          Simon Latapie <garf@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32 #include <assert.h>
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_filter.h>
  37 #include <vlc_mouse.h>
  38 #include <vlc_subpicture.h>
  39 #include <vlc_url.h>
  40 #include <vlc_image.h>
  41
  42 #ifdef LoadImage
  43 #   undef LoadImage
  44 #endif
  45
  46 /*****************************************************************************
  47  * Module descriptor
  48  *****************************************************************************/
  49 #define FILE_TEXT N_("Logo filenames")
  50 #define FILE_LONGTEXT N_("Full path of the image files to use. Format is " \
  51 "<image>[,<delay in ms>[,<alpha>]][;<image>[,<delay>[,<alpha>]]][;...]. " \
  52 "If you only have one file, simply enter its filename.")
  53 #define REPEAT_TEXT N_("Logo animation # of loops")
  54 #define REPEAT_LONGTEXT N_("Number of loops for the logo animation. " \
  55         "-1 = continuous, 0 = disabled")
  56 #define DELAY_TEXT N_("Logo individual image time in ms")
  57 #define DELAY_LONGTEXT N_("Individual image display time of 0 - 60000 ms.")
  58
  59 #define POSX_TEXT N_("X coordinate")
  60 #define POSX_LONGTEXT N_("X coordinate of the logo. You can move the logo " \
  61                 "by left-clicking it." )
  62 #define POSY_TEXT N_("Y coordinate")
  63 #define POSY_LONGTEXT N_("Y coordinate of the logo. You can move the logo " \
  64                 "by left-clicking it." )
  65 #define OPACITY_TEXT N_("Opacity of the logo")
  66 #define OPACITY_LONGTEXT N_("Logo opacity value " \
  67   "(from 0 for full transparency to 255 for full opacity)." )
  68 #define POS_TEXT N_("Logo position")
  69 #define POS_LONGTEXT N_( \
  70   "Enforce the logo position on the video " \
  71   "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
  72   "also use combinations of these values, eg 6 = top-right).")
  73
  74 #define LOGO_HELP N_("Use a local picture as logo on the video")
  75
  76 #define CFG_PREFIX "logo-"
  77
  78 static const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
  79 static const char *const ppsz_pos_descriptions[] =
  80 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
  81   N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
  82
  83 static int  OpenSub  ( vlc_object_t * );
  84 static int  OpenVideo( vlc_object_t * );
  85 static void Close    ( vlc_object_t * );
  86
  87 vlc_module_begin ()
  88     set_category( CAT_VIDEO )
  89     set_subcategory( SUBCAT_VIDEO_SUBPIC )
  90     set_help(LOGO_HELP)
  91     set_capability( "sub source", 0 )
  92     set_callbacks( OpenSub, Close )
  93     set_description( N_("Logo sub source") )
  94     set_shortname( N_("Logo overlay") )
  95     add_shortcut( "logo" )
  96
  97     add_loadfile( CFG_PREFIX "file", NULL, FILE_TEXT, FILE_LONGTEXT, false )
  98     add_integer( CFG_PREFIX "x", -1, POSX_TEXT, POSX_LONGTEXT, true )
  99     add_integer( CFG_PREFIX "y", -1, POSY_TEXT, POSY_LONGTEXT, true )
 100     /* default to 1000 ms per image, continuously cycle through them */
 101     add_integer( CFG_PREFIX "delay", 1000, DELAY_TEXT, DELAY_LONGTEXT, true )
 102     add_integer( CFG_PREFIX "repeat", -1, REPEAT_TEXT, REPEAT_LONGTEXT, true )
 103     add_integer_with_range( CFG_PREFIX "opacity", 255, 0, 255,
 104         OPACITY_TEXT, OPACITY_LONGTEXT, false )
 105     add_integer( CFG_PREFIX "position", -1, POS_TEXT, POS_LONGTEXT, false )
 106         change_integer_list( pi_pos_values, ppsz_pos_descriptions )
 107
 108     /* video output filter submodule */
 109     add_submodule ()
 110     set_capability( "video filter", 0 )
 111     set_callbacks( OpenVideo, Close )
 112     set_description( N_("Logo video filter") )
 113     add_shortcut( "logo" )
 114 vlc_module_end ()
 115
 116
 117 /*****************************************************************************
 118  * Local prototypes
 119  *****************************************************************************/
 120
 121 /**
 122  * Structure to hold the set of individual logo image names, times,
 123  * transparencies
 124  */
 125 typedef struct
 126 {
 127     int i_delay;       /* -1 means use default delay */
 128     int i_alpha;       /* -1 means use default alpha */
 129     picture_t *p_pic;
 130
 131 } logo_t;
 132
 133 /**
 134  * Logo list structure.
 135  */
 136 typedef struct
 137 {
 138     logo_t *p_logo;         /* the parsing's result */
 139     unsigned int i_count;   /* the number of logo images to be displayed */
 140
 141     int i_repeat;         /* how often to repeat the images, image time in ms */
 142     mtime_t i_next_pic;     /* when to bring up a new logo image */
 143
 144     unsigned int i_counter; /* index into the list of logo images */
 145
 146     int i_delay;            /* default delay (0 - 60000 ms) */
 147     int i_alpha;            /* default alpha */
 148
 149 } logo_list_t;
 150
 151 /**
 152  * Private logo data holder
 153  */
 154 struct filter_sys_t
 155 {
 156     filter_t *p_blend;
 157
 158     vlc_mutex_t lock;
 159
 160     logo_list_t list;
 161
 162     int i_pos;
 163     int i_pos_x;
 164     int i_pos_y;
 165     bool b_absolute;
 166
 167     /* On the fly control variable */
 168     bool b_spu_update;
 169
 170     /* */
 171     bool b_mouse_grab;
 172 };
 173
 174 static const char *const ppsz_filter_options[] = {
 175     "file", "x", "y", "delay", "repeat", "opacity", "position", NULL
 176 };
 177
 178 static const char *const ppsz_filter_callbacks[] = {
 179     "logo-file",
 180     "logo-x",
 181     "logo-y",
 182     "logo-position",
 183     "logo-opacity",
 184     "logo-repeat",
 185     NULL
 186 };
 187
 188 static int OpenCommon( vlc_object_t *, bool b_sub );
 189
 190 static subpicture_t *FilterSub( filter_t *, mtime_t );
 191 static picture_t    *FilterVideo( filter_t *, picture_t * );
 192
 193 static int Mouse( filter_t *, vlc_mouse_t *, const vlc_mouse_t *, const vlc_mouse_t * );
 194
 195 static int LogoCallback( vlc_object_t *, char const *,
 196                          vlc_value_t, vlc_value_t, void * );
 197
 198 static void LogoListLoad( vlc_object_t *, logo_list_t *, const char * );
 199 static void LogoListUnload( logo_list_t * );
 200 static logo_t *LogoListNext( logo_list_t *p_list, mtime_t i_date );
 201 static logo_t *LogoListCurrent( logo_list_t *p_list );
 202
 203 /**
 204  * Open the sub source
 205  */
 206 static int OpenSub( vlc_object_t *p_this )
 207 {
 208     return OpenCommon( p_this, true );
 209 }
 210
 211 /**
 212  * Open the video filter
 213  */
 214 static int OpenVideo( vlc_object_t *p_this )
 215 {
 216     return OpenCommon( p_this, false );
 217 }
 218
 219 /**
 220  * Common open function
 221  */
 222 static int OpenCommon( vlc_object_t *p_this, bool b_sub )
 223 {
 224     filter_t *p_filter = (filter_t *)p_this;
 225     filter_sys_t *p_sys;
 226     char *psz_filename;
 227
 228     /* */
 229     if( !b_sub && !es_format_IsSimilar( &p_filter->fmt_in, &p_filter->fmt_out ) )
 230     {
 231         msg_Err( p_filter, "Input and output format does not match" );
 232         return VLC_EGENERIC;
 233     }
 234
 235     /* */
 236     p_filter->p_sys = p_sys = malloc( sizeof( *p_sys ) );
 237     if( !p_sys )
 238         return VLC_ENOMEM;
 239
 240     /* */
 241     p_sys->p_blend = NULL;
 242     if( !b_sub )
 243     {
 244
 245         p_sys->p_blend = filter_NewBlend( VLC_OBJECT(p_filter),
 246                                           &p_filter->fmt_in.video );
 247         if( !p_sys->p_blend )
 248         {
 249             free( p_sys );
 250             return VLC_EGENERIC;
 251         }
 252     }
 253
 254     /* */
 255     config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
 256                        p_filter->p_cfg );
 257
 258     /* */
 259     logo_list_t *p_list = &p_sys->list;
 260
 261     psz_filename = var_CreateGetStringCommand( p_filter, "logo-file" );
 262     if( !psz_filename )
 263     {
 264         if( p_sys->p_blend )
 265             filter_DeleteBlend( p_sys->p_blend );
 266         free( p_sys );
 267         return VLC_ENOMEM;
 268     }
 269     if( *psz_filename == '\0' )
 270         msg_Warn( p_this, "no logo file specified" );
 271
 272     p_list->i_alpha = var_CreateGetIntegerCommand( p_filter, "logo-opacity");
 273     p_list->i_alpha = VLC_CLIP( p_list->i_alpha, 0, 255 );
 274     p_list->i_delay = var_CreateGetIntegerCommand( p_filter, "logo-delay" );
 275     p_list->i_repeat = var_CreateGetIntegerCommand( p_filter, "logo-repeat" );
 276
 277     p_sys->i_pos = var_CreateGetIntegerCommand( p_filter, "logo-position" );
 278     p_sys->i_pos_x = var_CreateGetIntegerCommand( p_filter, "logo-x" );
 279     p_sys->i_pos_y = var_CreateGetIntegerCommand( p_filter, "logo-y" );
 280     p_sys->b_absolute = (p_sys->i_pos < 0);
 281
 282     /* Ignore aligment if a position is given for video filter */
 283     if( !b_sub && p_sys->i_pos_x >= 0 && p_sys->i_pos_y >= 0 )
 284         p_sys->i_pos = 0;
 285
 286     vlc_mutex_init( &p_sys->lock );
 287     LogoListLoad( p_this, p_list, psz_filename );
 288     p_sys->b_spu_update = true;
 289     p_sys->b_mouse_grab = false;
 290
 291     for( int i = 0; ppsz_filter_callbacks[i]; i++ )
 292         var_AddCallback( p_filter, ppsz_filter_callbacks[i],
 293                          LogoCallback, p_sys );
 294
 295     /* Misc init */
 296     if( b_sub )
 297     {
 298         p_filter->pf_sub_source = FilterSub;
 299     }
 300     else
 301     {
 302         p_filter->pf_video_filter = FilterVideo;
 303         p_filter->pf_video_mouse = Mouse;
 304     }
 305
 306     free( psz_filename );
 307     return VLC_SUCCESS;
 308 }
 309
 310 /**
 311  * Common close function
 312  */
 313 static void Close( vlc_object_t *p_this )
 314 {
 315     filter_t *p_filter = (filter_t *)p_this;
 316     filter_sys_t *p_sys = p_filter->p_sys;
 317
 318     for( int i = 0; ppsz_filter_callbacks[i]; i++ )
 319         var_DelCallback( p_filter, ppsz_filter_callbacks[i],
 320                          LogoCallback, p_sys );
 321
 322     if( p_sys->p_blend )
 323         filter_DeleteBlend( p_sys->p_blend );
 324
 325     vlc_mutex_destroy( &p_sys->lock );
 326     LogoListUnload( &p_sys->list );
 327     free( p_sys );
 328 }
 329
 330 /**
 331  * Sub source
 332  */
 333 static subpicture_t *FilterSub( filter_t *p_filter, mtime_t date )
 334 {
 335     filter_sys_t *p_sys = p_filter->p_sys;
 336     logo_list_t *p_list = &p_sys->list;
 337
 338     subpicture_t *p_spu;
 339     subpicture_region_t *p_region;
 340     video_format_t fmt;
 341     picture_t *p_pic;
 342     logo_t *p_logo;
 343
 344     vlc_mutex_lock( &p_sys->lock );
 345     /* Basic test:  b_spu_update occurs on a dynamic change,
 346                     & i_next_pic is the general timer, when to
 347                     look at updating the logo image */
 348
 349     if( ( !p_sys->b_spu_update && p_list->i_next_pic > date ) ||
 350         !p_list->i_repeat )
 351     {
 352         vlc_mutex_unlock( &p_sys->lock );
 353         return NULL;
 354     }
 355
 356     /* adjust index to the next logo */
 357     p_logo = LogoListNext( p_list, date );
 358     p_sys->b_spu_update = false;
 359
 360     p_pic = p_logo->p_pic;
 361
 362     /* Allocate the subpicture internal data. */
 363     p_spu = filter_NewSubpicture( p_filter );
 364     if( !p_spu )
 365         goto exit;
 366
 367     p_spu->b_absolute = p_sys->b_absolute;
 368     p_spu->i_start = date;
 369     p_spu->i_stop = 0;
 370     p_spu->b_ephemer = true;
 371
 372     /* Send an empty subpicture to clear the display when needed */
 373     if( p_list->i_repeat != -1 && p_list->i_counter == 0 )
 374     {
 375         p_list->i_repeat--;
 376         if( p_list->i_repeat < 0 )
 377             goto exit;
 378     }
 379     if( !p_pic || !p_logo->i_alpha ||
 380         ( p_logo->i_alpha == -1 && !p_list->i_alpha ) )
 381         goto exit;
 382
 383     /* Create new SPU region */
 384     memset( &fmt, 0, sizeof(video_format_t) );
 385     fmt.i_chroma = VLC_CODEC_YUVA;
 386     fmt.i_sar_num = fmt.i_sar_den = 1;
 387     fmt.i_width = fmt.i_visible_width = p_pic->p[Y_PLANE].i_visible_pitch;
 388     fmt.i_height = fmt.i_visible_height = p_pic->p[Y_PLANE].i_visible_lines;
 389     fmt.i_x_offset = fmt.i_y_offset = 0;
 390     p_region = subpicture_region_New( &fmt );
 391     if( !p_region )
 392     {
 393         msg_Err( p_filter, "cannot allocate SPU region" );
 394         subpicture_Delete( p_spu );
 395         p_spu = NULL;
 396         goto exit;
 397     }
 398
 399     /* */
 400     picture_Copy( p_region->p_picture, p_pic );
 401
 402     /*  where to locate the logo: */
 403     if( p_sys->i_pos < 0 )
 404     {   /*  set to an absolute xy */
 405         p_region->i_align = SUBPICTURE_ALIGN_RIGHT | SUBPICTURE_ALIGN_TOP;
 406         p_spu->b_absolute = true;
 407     }
 408     else
 409     {   /* set to one of the 9 relative locations */
 410         p_region->i_align = p_sys->i_pos;
 411         p_spu->b_absolute = false;
 412     }
 413
 414     p_region->i_x = p_sys->i_pos_x > 0 ? p_sys->i_pos_x : 0;
 415     p_region->i_y = p_sys->i_pos_y > 0 ? p_sys->i_pos_y : 0;
 416
 417     p_spu->p_region = p_region;
 418
 419     p_spu->i_alpha = ( p_logo->i_alpha != -1 ?
 420                        p_logo->i_alpha : p_list->i_alpha );
 421
 422 exit:
 423     vlc_mutex_unlock( &p_sys->lock );
 424
 425     return p_spu;
 426 }
 427
 428 /**
 429  * Video filter
 430  */
 431 static picture_t *FilterVideo( filter_t *p_filter, picture_t *p_src )
 432 {
 433     filter_sys_t *p_sys = p_filter->p_sys;
 434     logo_list_t *p_list = &p_sys->list;
 435
 436     picture_t *p_dst = filter_NewPicture( p_filter );
 437     if( !p_dst )
 438         goto exit;
 439
 440     picture_Copy( p_dst, p_src );
 441
 442     /* */
 443     vlc_mutex_lock( &p_sys->lock );
 444
 445     logo_t *p_logo;
 446     if( p_list->i_next_pic < p_src->date )
 447         p_logo = LogoListNext( p_list, p_src->date );
 448     else
 449         p_logo = LogoListCurrent( p_list );
 450
 451     /* */
 452     const picture_t *p_pic = p_logo->p_pic;
 453     if( p_pic )
 454     {
 455         const video_format_t *p_fmt = &p_pic->format;
 456         const int i_dst_w = p_filter->fmt_out.video.i_visible_width;
 457         const int i_dst_h = p_filter->fmt_out.video.i_visible_height;
 458
 459         if( p_sys->i_pos )
 460         {
 461             if( p_sys->i_pos & SUBPICTURE_ALIGN_BOTTOM )
 462             {
 463                 p_sys->i_pos_y = i_dst_h - p_fmt->i_visible_height;
 464             }
 465             else if ( !(p_sys->i_pos & SUBPICTURE_ALIGN_TOP) )
 466             {
 467                 p_sys->i_pos_y = ( i_dst_h - p_fmt->i_visible_height ) / 2;
 468             }
 469             else
 470             {
 471                 p_sys->i_pos_y = 0;
 472             }
 473
 474             if( p_sys->i_pos & SUBPICTURE_ALIGN_RIGHT )
 475             {
 476                 p_sys->i_pos_x = i_dst_w - p_fmt->i_visible_width;
 477             }
 478             else if ( !(p_sys->i_pos & SUBPICTURE_ALIGN_LEFT) )
 479             {
 480                 p_sys->i_pos_x = ( i_dst_w - p_fmt->i_visible_width ) / 2;
 481             }
 482             else
 483             {
 484                 p_sys->i_pos_x = 0;
 485             }
 486         }
 487
 488         if( p_sys->i_pos_x < 0 || p_sys->i_pos_y < 0 )
 489         {
 490             msg_Warn( p_filter,
 491                 "logo(%ix%i) doesn't fit into video(%ix%i)",
 492                 p_fmt->i_visible_width, p_fmt->i_visible_height,
 493                 i_dst_w,i_dst_h );
 494             p_sys->i_pos_x = (p_sys->i_pos_x > 0) ? p_sys->i_pos_x : 0;
 495             p_sys->i_pos_y = (p_sys->i_pos_y > 0) ? p_sys->i_pos_y : 0;
 496         }
 497
 498         /* */
 499         const int i_alpha = p_logo->i_alpha != -1 ? p_logo->i_alpha : p_list->i_alpha;
 500         if( filter_ConfigureBlend( p_sys->p_blend, i_dst_w, i_dst_h, p_fmt ) ||
 501             filter_Blend( p_sys->p_blend, p_dst, p_sys->i_pos_x, p_sys->i_pos_y,
 502                           p_pic, i_alpha ) )
 503         {
 504             msg_Err( p_filter, "failed to blend a picture" );
 505         }
 506     }
 507     vlc_mutex_unlock( &p_sys->lock );
 508
 509 exit:
 510     picture_Release( p_src );
 511     return p_dst;
 512 }
 513
 514 static int Mouse( filter_t *p_filter, vlc_mouse_t *p_mouse,
 515                   const vlc_mouse_t *p_old, const vlc_mouse_t *p_new )
 516 {
 517     filter_sys_t *p_sys = p_filter->p_sys;
 518
 519     vlc_mutex_lock( &p_sys->lock );
 520     logo_t *p_logo = LogoListCurrent( &p_sys->list );
 521     const picture_t *p_pic = p_logo->p_pic;
 522
 523     if( p_pic )
 524     {
 525         const video_format_t *p_fmt = &p_pic->format;
 526         const int i_logo_w = p_fmt->i_visible_width;
 527         const int i_logo_h = p_fmt->i_visible_height;
 528
 529         /* Check if we are over the logo */
 530         const bool b_over = p_new->i_x >= p_sys->i_pos_x &&
 531                             p_new->i_x <  p_sys->i_pos_x + i_logo_w &&
 532                             p_new->i_y >= p_sys->i_pos_y &&
 533                             p_new->i_y <  p_sys->i_pos_y + i_logo_h;
 534
 535         if( b_over && vlc_mouse_HasPressed( p_old, p_new, MOUSE_BUTTON_LEFT ) )
 536             p_sys->b_mouse_grab = true;
 537         else if( vlc_mouse_HasReleased( p_old, p_new, MOUSE_BUTTON_LEFT ) )
 538             p_sys->b_mouse_grab = false;
 539
 540         if( p_sys->b_mouse_grab )
 541         {
 542             int i_dx, i_dy;
 543             vlc_mouse_GetMotion( &i_dx, &i_dy, p_old, p_new );
 544             p_sys->i_pos_x = VLC_CLIP( p_sys->i_pos_x + i_dx, 0,
 545                                     p_filter->fmt_in.video.i_width  - i_logo_w );
 546             p_sys->i_pos_y = VLC_CLIP( p_sys->i_pos_y + i_dy, 0,
 547                                     p_filter->fmt_in.video.i_height - i_logo_h );
 548         }
 549
 550         if( p_sys->b_mouse_grab || b_over )
 551         {
 552             vlc_mutex_unlock( &p_sys->lock );
 553             return VLC_EGENERIC;
 554         }
 555     }
 556     vlc_mutex_unlock( &p_sys->lock );
 557
 558     *p_mouse = *p_new;
 559     return VLC_SUCCESS;
 560 }
 561
 562 /*****************************************************************************
 563  * Callback to update params on the fly
 564  *****************************************************************************/
 565 static int LogoCallback( vlc_object_t *p_this, char const *psz_var,
 566                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 567 {
 568     VLC_UNUSED(oldval);
 569     filter_sys_t *p_sys = (filter_sys_t *)p_data;
 570     logo_list_t *p_list = &p_sys->list;
 571
 572     vlc_mutex_lock( &p_sys->lock );
 573     if( !strcmp( psz_var, "logo-file" ) )
 574     {
 575         LogoListUnload( p_list );
 576         LogoListLoad( p_this, p_list, newval.psz_string );
 577     }
 578     else if ( !strcmp( psz_var, "logo-x" ) )
 579     {
 580         p_sys->i_pos_x = newval.i_int;
 581     }
 582     else if ( !strcmp( psz_var, "logo-y" ) )
 583     {
 584         p_sys->i_pos_y = newval.i_int;
 585     }
 586     else if ( !strcmp( psz_var, "logo-position" ) )
 587     {
 588         p_sys->i_pos = newval.i_int;
 589     }
 590     else if ( !strcmp( psz_var, "logo-opacity" ) )
 591     {
 592         p_list->i_alpha = VLC_CLIP( newval.i_int, 0, 255 );
 593     }
 594     else if ( !strcmp( psz_var, "logo-repeat" ) )
 595     {
 596         p_list->i_repeat = newval.i_int;
 597     }
 598     p_sys->b_spu_update = true;
 599     vlc_mutex_unlock( &p_sys->lock );
 600
 601     return VLC_SUCCESS;
 602 }
 603
 604 /**
 605  * It loads the logo image into memory.
 606  */
 607 static picture_t *LoadImage( vlc_object_t *p_this, const char *psz_filename )
 608 {
 609     if( !psz_filename )
 610         return NULL;
 611
 612     video_format_t fmt_in;
 613     video_format_Init( &fmt_in, 0 );
 614
 615     video_format_t fmt_out;
 616     video_format_Init( &fmt_out, VLC_CODEC_YUVA );
 617
 618     image_handler_t *p_image = image_HandlerCreate( p_this );
 619     if( !p_image )
 620         return NULL;
 621
 622     char *psz_url = vlc_path2uri( psz_filename, NULL );
 623     picture_t *p_pic = image_ReadUrl( p_image, psz_url, &fmt_in, &fmt_out );
 624     free( psz_url );
 625     image_HandlerDelete( p_image );
 626
 627     return p_pic;
 628 }
 629
 630 /**
 631  * It loads the logo images into memory.
 632  *
 633  * Read the logo-file input switch, obtaining a list of images and
 634  * associated durations and transparencies. Store the image(s), and
 635  * times. An image without a stated time or opacity will use the
 636  * logo-delay and logo-opacity values.
 637  */
 638 static void LogoListLoad( vlc_object_t *p_this, logo_list_t *p_logo_list,
 639                           const char *psz_filename )
 640 {
 641     char *psz_list; /* the list: <logo>[,[<delay>[,[<alpha>]]]][;...] */
 642     char *psz_original;
 643     logo_t *p_logo;         /* the parsing's result */
 644
 645     p_logo_list->i_counter = 0;
 646     p_logo_list->i_next_pic = 0;
 647
 648     psz_original = psz_list = strdup( psz_filename );
 649
 650     if( !psz_list )
 651         return;
 652
 653     /* Count the number logos == number of ';' + 1 */
 654     p_logo_list->i_count = 1;
 655     for( unsigned i = 0; i < strlen( psz_list ); i++ )
 656     {
 657         if( psz_list[i] == ';' )
 658             p_logo_list->i_count++;
 659     }
 660
 661     p_logo_list->p_logo =
 662     p_logo              = calloc( p_logo_list->i_count, sizeof(*p_logo) );
 663
 664     if( !p_logo )
 665     {
 666         free( psz_list );
 667         return;
 668     }
 669
 670     /* Fill the data */
 671     for( unsigned i = 0; i < p_logo_list->i_count; i++ )
 672     {
 673         char *p_c  = strchr( psz_list, ';' );
 674         char *p_c2 = strchr( psz_list, ',' );
 675
 676         p_logo[i].i_alpha = -1; /* use default settings */
 677         p_logo[i].i_delay = -1; /* use default settings */
 678
 679         if( p_c2 && ( p_c2 < p_c || !p_c ) )
 680         {
 681             /* <logo>,<delay>[,<alpha>] type */
 682             if( p_c2[1] != ',' && p_c2[1] != ';' && p_c2[1] != '\0' )
 683                 p_logo[i].i_delay = atoi( p_c2+1 );
 684             *p_c2 = '\0';
 685             if( ( p_c2 = strchr( p_c2+1, ',' ) )
 686                 && ( p_c2 < p_c || !p_c ) && p_c2[1] != ';' && p_c2[1] != '\0' )
 687                 p_logo[i].i_alpha = atoi( p_c2 + 1 );
 688         }
 689         else
 690         {
 691             /* <logo> type */
 692             if( p_c )
 693                 *p_c = '\0';
 694         }
 695
 696         msg_Dbg( p_this, "logo file name %s, delay %d, alpha %d",
 697                  psz_list, p_logo[i].i_delay, p_logo[i].i_alpha );
 698         p_logo[i].p_pic = LoadImage( p_this, psz_list );
 699         if( !p_logo[i].p_pic )
 700         {
 701             msg_Warn( p_this, "error while loading logo %s, will be skipped",
 702                       psz_list );
 703         }
 704
 705         if( p_c )
 706             psz_list = &p_c[1];
 707     }
 708
 709     /* initialize so that on the first update it will wrap back to 0 */
 710     p_logo_list->i_counter = p_logo_list->i_count - 1;
 711
 712     free( psz_original );
 713 }
 714
 715 /**
 716  * Unload a list of logo and release associated ressources.
 717  */
 718 static void LogoListUnload( logo_list_t *p_list )
 719 {
 720     for( unsigned i = 0; i < p_list->i_count; i++ )
 721     {
 722         logo_t *p_logo = &p_list->p_logo[i];
 723
 724         if( p_logo->p_pic )
 725             picture_Release( p_logo->p_pic );
 726     }
 727     free( p_list->p_logo );
 728 }
 729
 730 /**
 731  * Go to the next logo and return its pointer.
 732  */
 733 static logo_t *LogoListNext( logo_list_t *p_list, mtime_t i_date )
 734 {
 735     p_list->i_counter = ( p_list->i_counter + 1 ) % p_list->i_count;
 736
 737     logo_t *p_logo = LogoListCurrent( p_list );
 738
 739     p_list->i_next_pic = i_date + ( p_logo->i_delay != -1 ?
 740                           p_logo->i_delay : p_list->i_delay ) * 1000;
 741     return p_logo;
 742 }
 743 /**
 744  * Return the current logo pointer
 745  */
 746 static logo_t *LogoListCurrent( logo_list_t *p_list )
 747 {
 748     return &p_list->p_logo[p_list->i_counter];
 749 }
 750