modules/video_filter/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_url.h>
  38
  39 #include <vlc_image.h>
  40
  41 #ifdef LoadImage
  42 #   undef LoadImage
  43 #endif
  44
  45 /*****************************************************************************
  46  * Module descriptor
  47  *****************************************************************************/
  48 #define FILE_TEXT N_("Logo filenames")
  49 #define FILE_LONGTEXT N_("Full path of the image files to use. Format is " \
  50 "<image>[,<delay in ms>[,<alpha>]][;<image>[,<delay>[,<alpha>]]][;...]. " \
  51 "If you only have one file, simply enter its filename.")
  52 #define REPEAT_TEXT N_("Logo animation # of loops")
  53 #define REPEAT_LONGTEXT N_("Number of loops for the logo animation." \
  54         "-1 = continuous, 0 = disabled")
  55 #define DELAY_TEXT N_("Logo individual image time in ms")
  56 #define DELAY_LONGTEXT N_("Individual image display time of 0 - 60000 ms.")
  57
  58 #define POSX_TEXT N_("X coordinate")
  59 #define POSX_LONGTEXT N_("X coordinate of the logo. You can move the logo " \
  60                 "by left-clicking it." )
  61 #define POSY_TEXT N_("Y coordinate")
  62 #define POSY_LONGTEXT N_("Y coordinate of the logo. You can move the logo " \
  63                 "by left-clicking it." )
  64 #define OPACITY_TEXT N_("Opacity of the logo")
  65 #define OPACITY_LONGTEXT N_("Logo opacity value " \
  66   "(from 0 for full transparency to 255 for full opacity)." )
  67 #define POS_TEXT N_("Logo position")
  68 #define POS_LONGTEXT N_( \
  69   "Enforce the logo position on the video " \
  70   "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
  71   "also use combinations of these values, eg 6 = top-right).")
  72
  73 #define LOGO_HELP N_("Use a local picture as logo on the video")
  74
  75 #define CFG_PREFIX "logo-"
  76
  77 static const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
  78 static const char *const ppsz_pos_descriptions[] =
  79 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
  80   N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
  81
  82 static int  OpenSub  ( vlc_object_t * );
  83 static int  OpenVideo( vlc_object_t * );
  84 static void Close    ( vlc_object_t * );
  85
  86 vlc_module_begin ()
  87     set_category( CAT_VIDEO )
  88     set_subcategory( SUBCAT_VIDEO_SUBPIC )
  89     set_help(LOGO_HELP)
  90     set_capability( "sub source", 0 )
  91     set_callbacks( OpenSub, Close )
  92     set_description( N_("Logo sub source") )
  93     set_shortname( N_("Logo overlay") )
  94     add_shortcut( "logo" )
  95
  96     add_loadfile( CFG_PREFIX "file", NULL, FILE_TEXT, FILE_LONGTEXT, false )
  97     add_integer( CFG_PREFIX "x", -1, POSX_TEXT, POSX_LONGTEXT, true )
  98     add_integer( CFG_PREFIX "y", -1, POSY_TEXT, POSY_LONGTEXT, true )
  99     /* default to 1000 ms per image, continuously cycle through them */
 100     add_integer( CFG_PREFIX "delay", 1000, DELAY_TEXT, DELAY_LONGTEXT, true )
 101     add_integer( CFG_PREFIX "repeat", -1, REPEAT_TEXT, REPEAT_LONGTEXT, true )
 102     add_integer_with_range( CFG_PREFIX "opacity", 255, 0, 255,
 103         OPACITY_TEXT, OPACITY_LONGTEXT, false )
 104     add_integer( CFG_PREFIX "position", -1, POS_TEXT, POS_LONGTEXT, false )
 105         change_integer_list( pi_pos_values, ppsz_pos_descriptions )
 106
 107     /* video output filter submodule */
 108     add_submodule ()
 109     set_capability( "video filter2", 0 )
 110     set_callbacks( OpenVideo, Close )
 111     set_description( N_("Logo video filter") )
 112     add_shortcut( "logo" )
 113 vlc_module_end ()
 114
 115
 116 /*****************************************************************************
 117  * Local prototypes
 118  *****************************************************************************/
 119
 120 /**
 121  * Structure to hold the set of individual logo image names, times,
 122  * transparencies
 123  */
 124 typedef struct
 125 {
 126     int i_delay;       /* -1 means use default delay */
 127     int i_alpha;       /* -1 means use default alpha */
 128     picture_t *p_pic;
 129
 130 } logo_t;
 131
 132 /**
 133  * Logo list structure.
 134  */
 135 typedef struct
 136 {
 137     logo_t *p_logo;         /* the parsing's result */
 138     unsigned int i_count;   /* the number of logo images to be displayed */
 139
 140     int i_repeat;         /* how often to repeat the images, image time in ms */
 141     mtime_t i_next_pic;     /* when to bring up a new logo image */
 142
 143     unsigned int i_counter; /* index into the list of logo images */
 144
 145     int i_delay;            /* default delay (0 - 60000 ms) */
 146     int i_alpha;            /* default alpha */
 147
 148 } logo_list_t;
 149
 150 /**
 151  * Private logo data holder
 152  */
 153 struct filter_sys_t
 154 {
 155     filter_t *p_blend;
 156
 157     vlc_mutex_t lock;
 158
 159     logo_list_t list;
 160
 161     int i_pos;
 162     int i_pos_x;
 163     int i_pos_y;
 164     bool b_absolute;
 165
 166     /* On the fly control variable */
 167     bool b_spu_update;
 168
 169     /* */
 170     bool b_mouse_grab;
 171 };
 172
 173 static const char *const ppsz_filter_options[] = {
 174     "file", "x", "y", "delay", "repeat", "opacity", "position", NULL
 175 };
 176
 177 static const char *const ppsz_filter_callbacks[] = {
 178     "logo-file",
 179     "logo-x",
 180     "logo-y",
 181     "logo-position",
 182     "logo-opacity",
 183     "logo-repeat",
 184     NULL
 185 };
 186
 187 static int OpenCommon( vlc_object_t *, bool b_sub );
 188
 189 static subpicture_t *FilterSub( filter_t *, mtime_t );
 190 static picture_t    *FilterVideo( filter_t *, picture_t * );
 191
 192 static int Mouse( filter_t *, vlc_mouse_t *, const vlc_mouse_t *, const vlc_mouse_t * );
 193
 194 static int LogoCallback( vlc_object_t *, char const *,
 195                          vlc_value_t, vlc_value_t, void * );
 196
 197 static void LogoListLoad( vlc_object_t *, logo_list_t *, const char * );
 198 static void LogoListUnload( logo_list_t * );
 199 static logo_t *LogoListNext( logo_list_t *p_list, mtime_t i_date );
 200 static logo_t *LogoListCurrent( logo_list_t *p_list );
 201
 202 /**
 203  * Open the sub source
 204  */
 205 static int OpenSub( vlc_object_t *p_this )
 206 {
 207     return OpenCommon( p_this, true );
 208 }
 209
 210 /**
 211  * Open the video filter
 212  */
 213 static int OpenVideo( vlc_object_t *p_this )
 214 {
 215     return OpenCommon( p_this, false );
 216 }
 217
 218 /**
 219  * Common open function
 220  */
 221 static int OpenCommon( vlc_object_t *p_this, bool b_sub )
 222 {
 223     filter_t *p_filter = (filter_t *)p_this;
 224     filter_sys_t *p_sys;
 225     char *psz_filename;
 226
 227     /* */
 228     if( !b_sub && !es_format_IsSimilar( &p_filter->fmt_in, &p_filter->fmt_out ) )
 229     {
 230         msg_Err( p_filter, "Input and output format does not match" );
 231         return VLC_EGENERIC;
 232     }
 233
 234     /* */
 235     p_filter->p_sys = p_sys = malloc( sizeof( *p_sys ) );
 236     if( !p_sys )
 237         return VLC_ENOMEM;
 238
 239     /* */
 240     p_sys->p_blend = NULL;
 241     if( !b_sub )
 242     {
 243
 244         p_sys->p_blend = filter_NewBlend( VLC_OBJECT(p_filter),
 245                                           &p_filter->fmt_in.video );
 246         if( !p_sys->p_blend )
 247         {
 248             free( p_sys );
 249             return VLC_EGENERIC;
 250         }
 251     }
 252
 253     /* */
 254     config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
 255                        p_filter->p_cfg );
 256
 257     /* */
 258     logo_list_t *p_list = &p_sys->list;
 259
 260     psz_filename = var_CreateGetStringCommand( p_filter, "logo-file" );
 261     if( !psz_filename )
 262     {
 263         if( p_sys->p_blend )
 264             filter_DeleteBlend( p_sys->p_blend );
 265         free( p_sys );
 266         return VLC_ENOMEM;
 267     }
 268     if( *psz_filename == '\0' )
 269         msg_Warn( p_this, "no logo file specified" );
 270
 271     p_list->i_alpha = var_CreateGetIntegerCommand( p_filter, "logo-opacity");
 272     p_list->i_alpha = VLC_CLIP( p_list->i_alpha, 0, 255 );
 273     p_list->i_delay = var_CreateGetIntegerCommand( p_filter, "logo-delay" );
 274     p_list->i_repeat = var_CreateGetIntegerCommand( p_filter, "logo-repeat" );
 275
 276     p_sys->i_pos = var_CreateGetIntegerCommand( p_filter, "logo-position" );
 277     p_sys->i_pos_x = var_CreateGetIntegerCommand( p_filter, "logo-x" );
 278     p_sys->i_pos_y = var_CreateGetIntegerCommand( p_filter, "logo-y" );
 279     p_sys->b_absolute = (p_sys->i_pos < 0);
 280
 281     /* Ignore aligment if a position is given for video filter */
 282     if( !b_sub && p_sys->i_pos_x >= 0 && p_sys->i_pos_y >= 0 )
 283         p_sys->i_pos = 0;
 284
 285     vlc_mutex_init( &p_sys->lock );
 286     LogoListLoad( p_this, p_list, psz_filename );
 287     p_sys->b_spu_update = true;
 288     p_sys->b_mouse_grab = false;
 289
 290     for( int i = 0; ppsz_filter_callbacks[i]; i++ )
 291         var_AddCallback( p_filter, ppsz_filter_callbacks[i],
 292                          LogoCallback, p_sys );
 293
 294     /* Misc init */
 295     if( b_sub )
 296     {
 297         p_filter->pf_sub_source = FilterSub;
 298     }
 299     else
 300     {
 301         p_filter->pf_video_filter = FilterVideo;
 302         p_filter->pf_video_mouse = Mouse;
 303     }
 304
 305     free( psz_filename );
 306     return VLC_SUCCESS;
 307 }
 308
 309 /**
 310  * Common close function
 311  */
 312 static void Close( vlc_object_t *p_this )
 313 {
 314     filter_t *p_filter = (filter_t *)p_this;
 315     filter_sys_t *p_sys = p_filter->p_sys;
 316
 317     for( int i = 0; ppsz_filter_callbacks[i]; i++ )
 318         var_DelCallback( p_filter, ppsz_filter_callbacks[i],
 319                          LogoCallback, p_sys );
 320
 321     if( p_sys->p_blend )
 322         filter_DeleteBlend( p_sys->p_blend );
 323
 324     vlc_mutex_destroy( &p_sys->lock );
 325     LogoListUnload( &p_sys->list );
 326     free( p_sys );
 327 }
 328
 329 /**
 330  * Sub source
 331  */
 332 static subpicture_t *FilterSub( filter_t *p_filter, mtime_t date )
 333 {
 334     filter_sys_t *p_sys = p_filter->p_sys;
 335     logo_list_t *p_list = &p_sys->list;
 336
 337     subpicture_t *p_spu;
 338     subpicture_region_t *p_region;
 339     video_format_t fmt;
 340     picture_t *p_pic;
 341     logo_t *p_logo;
 342
 343     vlc_mutex_lock( &p_sys->lock );
 344     /* Basic test:  b_spu_update occurs on a dynamic change,
 345                     & i_next_pic is the general timer, when to
 346                     look at updating the logo image */
 347
 348     if( ( !p_sys->b_spu_update && p_list->i_next_pic > date ) ||
 349         !p_list->i_repeat )
 350     {
 351         vlc_mutex_unlock( &p_sys->lock );
 352         return NULL;
 353     }
 354
 355     /* adjust index to the next logo */
 356     p_logo = LogoListNext( p_list, date );
 357     p_sys->b_spu_update = false;
 358
 359     p_pic = p_logo->p_pic;
 360
 361     /* Allocate the subpicture internal data. */
 362     p_spu = filter_NewSubpicture( p_filter );
 363     if( !p_spu )
 364         goto exit;
 365
 366     p_spu->b_absolute = p_sys->b_absolute;
 367     p_spu->i_start = date;
 368     p_spu->i_stop = 0;
 369     p_spu->b_ephemer = true;
 370
 371     /* Send an empty subpicture to clear the display when needed */
 372     if( p_list->i_repeat != -1 && p_list->i_counter == 0 )
 373     {
 374         p_list->i_repeat--;
 375         if( p_list->i_repeat < 0 )
 376             goto exit;
 377     }
 378     if( !p_pic || !p_logo->i_alpha ||
 379         ( p_logo->i_alpha == -1 && !p_list->i_alpha ) )
 380         goto exit;
 381
 382     /* Create new SPU region */
 383     memset( &fmt, 0, sizeof(video_format_t) );
 384     fmt.i_chroma = VLC_CODEC_YUVA;
 385     fmt.i_sar_num = fmt.i_sar_den = 1;
 386     fmt.i_width = fmt.i_visible_width = p_pic->p[Y_PLANE].i_visible_pitch;
 387     fmt.i_height = fmt.i_visible_height = p_pic->p[Y_PLANE].i_visible_lines;
 388     fmt.i_x_offset = fmt.i_y_offset = 0;
 389     p_region = subpicture_region_New( &fmt );
 390     if( !p_region )
 391     {
 392         msg_Err( p_filter, "cannot allocate SPU region" );
 393         subpicture_Delete( p_spu );
 394         p_spu = NULL;
 395         goto exit;
 396     }
 397
 398     /* */
 399     picture_Copy( p_region->p_picture, p_pic );
 400
 401     /*  where to locate the logo: */
 402     if( p_sys->i_pos < 0 )
 403     {   /*  set to an absolute xy */
 404         p_region->i_align = SUBPICTURE_ALIGN_RIGHT | SUBPICTURE_ALIGN_TOP;
 405         p_spu->b_absolute = true;
 406     }
 407     else
 408     {   /* set to one of the 9 relative locations */
 409         p_region->i_align = p_sys->i_pos;
 410         p_spu->b_absolute = false;
 411     }
 412
 413     p_region->i_x = p_sys->i_pos_x;
 414     p_region->i_y = p_sys->i_pos_y;
 415
 416     p_spu->p_region = p_region;
 417
 418     p_spu->i_alpha = ( p_logo->i_alpha != -1 ?
 419                        p_logo->i_alpha : p_list->i_alpha );
 420
 421 exit:
 422     vlc_mutex_unlock( &p_sys->lock );
 423
 424     return p_spu;
 425 }
 426
 427 /**
 428  * Video filter
 429  */
 430 static picture_t *FilterVideo( filter_t *p_filter, picture_t *p_src )
 431 {
 432     filter_sys_t *p_sys = p_filter->p_sys;
 433     logo_list_t *p_list = &p_sys->list;
 434
 435     picture_t *p_dst = filter_NewPicture( p_filter );
 436     if( !p_dst )
 437         goto exit;
 438
 439     picture_Copy( p_dst, p_src );
 440
 441     /* */
 442     vlc_mutex_lock( &p_sys->lock );
 443
 444     logo_t *p_logo;
 445     if( p_list->i_next_pic < p_src->date )
 446         p_logo = LogoListNext( p_list, p_src->date );
 447     else
 448         p_logo = LogoListCurrent( p_list );
 449
 450     /* */
 451     const picture_t *p_pic = p_logo->p_pic;
 452     if( p_pic )
 453     {
 454         const video_format_t *p_fmt = &p_pic->format;
 455         const int i_dst_w = p_filter->fmt_out.video.i_visible_width;
 456         const int i_dst_h = p_filter->fmt_out.video.i_visible_height;
 457
 458         if( p_sys->i_pos )
 459         {
 460             if( p_sys->i_pos & SUBPICTURE_ALIGN_BOTTOM )
 461             {
 462                 p_sys->i_pos_y = i_dst_h - p_fmt->i_visible_height;
 463             }
 464             else if ( !(p_sys->i_pos & SUBPICTURE_ALIGN_TOP) )
 465             {
 466                 p_sys->i_pos_y = ( i_dst_h - p_fmt->i_visible_height ) / 2;
 467             }
 468             else
 469             {
 470                 p_sys->i_pos_y = 0;
 471             }
 472
 473             if( p_sys->i_pos & SUBPICTURE_ALIGN_RIGHT )
 474             {
 475                 p_sys->i_pos_x = i_dst_w - p_fmt->i_visible_width;
 476             }
 477             else if ( !(p_sys->i_pos & SUBPICTURE_ALIGN_LEFT) )
 478             {
 479                 p_sys->i_pos_x = ( i_dst_w - p_fmt->i_visible_width ) / 2;
 480             }
 481             else
 482             {
 483                 p_sys->i_pos_x = 0;
 484             }
 485         }
 486
 487         if( p_sys->i_pos_x < 0 || p_sys->i_pos_y < 0 )
 488         {
 489             msg_Warn( p_filter,
 490                 "logo(%ix%i) doesn't fit into video(%ix%i)",
 491                 p_fmt->i_visible_width, p_fmt->i_visible_height,
 492                 i_dst_w,i_dst_h );
 493             p_sys->i_pos_x = (p_sys->i_pos_x > 0) ? p_sys->i_pos_x : 0;
 494             p_sys->i_pos_y = (p_sys->i_pos_y > 0) ? p_sys->i_pos_y : 0;
 495         }
 496
 497         /* */
 498         const int i_alpha = p_logo->i_alpha != -1 ? p_logo->i_alpha : p_list->i_alpha;
 499         if( filter_ConfigureBlend( p_sys->p_blend, i_dst_w, i_dst_h, p_fmt ) ||
 500             filter_Blend( p_sys->p_blend, p_dst, p_sys->i_pos_x, p_sys->i_pos_y,
 501                           p_pic, i_alpha ) )
 502         {
 503             msg_Err( p_filter, "failed to blend a picture" );
 504         }
 505     }
 506     vlc_mutex_unlock( &p_sys->lock );
 507
 508 exit:
 509     picture_Release( p_src );
 510     return p_dst;
 511 }
 512
 513 static int Mouse( filter_t *p_filter, vlc_mouse_t *p_mouse,
 514                   const vlc_mouse_t *p_old, const vlc_mouse_t *p_new )
 515 {
 516     filter_sys_t *p_sys = p_filter->p_sys;
 517
 518     vlc_mutex_lock( &p_sys->lock );
 519     logo_t *p_logo = LogoListCurrent( &p_sys->list );
 520     const picture_t *p_pic = p_logo->p_pic;
 521
 522     if( p_pic )
 523     {
 524         const video_format_t *p_fmt = &p_pic->format;
 525         const int i_logo_w = p_fmt->i_visible_width;
 526         const int i_logo_h = p_fmt->i_visible_height;
 527
 528         /* Check if we are over the logo */
 529         const bool b_over = p_new->i_x >= p_sys->i_pos_x &&
 530                             p_new->i_x <  p_sys->i_pos_x + i_logo_w &&
 531                             p_new->i_y >= p_sys->i_pos_y &&
 532                             p_new->i_y <  p_sys->i_pos_y + i_logo_h;
 533
 534         if( b_over && vlc_mouse_HasPressed( p_old, p_new, MOUSE_BUTTON_LEFT ) )
 535             p_sys->b_mouse_grab = true;
 536         else if( vlc_mouse_HasReleased( p_old, p_new, MOUSE_BUTTON_LEFT ) )
 537             p_sys->b_mouse_grab = false;
 538
 539         if( p_sys->b_mouse_grab )
 540         {
 541             int i_dx, i_dy;
 542             vlc_mouse_GetMotion( &i_dx, &i_dy, p_old, p_new );
 543             p_sys->i_pos_x = VLC_CLIP( p_sys->i_pos_x + i_dx, 0,
 544                                     p_filter->fmt_in.video.i_width  - i_logo_w );
 545             p_sys->i_pos_y = VLC_CLIP( p_sys->i_pos_y + i_dy, 0,
 546                                     p_filter->fmt_in.video.i_height - i_logo_h );
 547
 548             /* object under mouse has moved */
 549             var_SetBool( p_filter->p_parent, "mouse-object", true );
 550         }
 551         else if( b_over )
 552         {
 553             /* object under mouse stoped moving */
 554             var_SetBool( p_filter->p_parent, "mouse-object", false );
 555         }
 556
 557         if( p_sys->b_mouse_grab || b_over )
 558         {
 559             vlc_mutex_unlock( &p_sys->lock );
 560             return VLC_EGENERIC;
 561         }
 562     }
 563     vlc_mutex_unlock( &p_sys->lock );
 564
 565     *p_mouse = *p_new;
 566     return VLC_SUCCESS;
 567 }
 568
 569 /*****************************************************************************
 570  * Callback to update params on the fly
 571  *****************************************************************************/
 572 static int LogoCallback( vlc_object_t *p_this, char const *psz_var,
 573                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 574 {
 575     VLC_UNUSED(oldval);
 576     filter_sys_t *p_sys = (filter_sys_t *)p_data;
 577     logo_list_t *p_list = &p_sys->list;
 578
 579     vlc_mutex_lock( &p_sys->lock );
 580     if( !strcmp( psz_var, "logo-file" ) )
 581     {
 582         LogoListUnload( p_list );
 583         LogoListLoad( p_this, p_list, newval.psz_string );
 584     }
 585     else if ( !strcmp( psz_var, "logo-x" ) )
 586     {
 587         p_sys->i_pos_x = newval.i_int;
 588     }
 589     else if ( !strcmp( psz_var, "logo-y" ) )
 590     {
 591         p_sys->i_pos_y = newval.i_int;
 592     }
 593     else if ( !strcmp( psz_var, "logo-position" ) )
 594     {
 595         p_sys->i_pos = newval.i_int;
 596     }
 597     else if ( !strcmp( psz_var, "logo-opacity" ) )
 598     {
 599         p_list->i_alpha = VLC_CLIP( newval.i_int, 0, 255 );
 600     }
 601     else if ( !strcmp( psz_var, "logo-repeat" ) )
 602     {
 603         p_list->i_repeat = newval.i_int;
 604     }
 605     p_sys->b_spu_update = true;
 606     vlc_mutex_unlock( &p_sys->lock );
 607
 608     return VLC_SUCCESS;
 609 }
 610
 611 /**
 612  * It loads the logo image into memory.
 613  */
 614 static picture_t *LoadImage( vlc_object_t *p_this, const char *psz_filename )
 615 {
 616     if( !psz_filename )
 617         return NULL;
 618
 619     video_format_t fmt_in;
 620     video_format_Init( &fmt_in, 0 );
 621
 622     video_format_t fmt_out;
 623     video_format_Init( &fmt_out, VLC_CODEC_YUVA );
 624
 625     image_handler_t *p_image = image_HandlerCreate( p_this );
 626     if( !p_image )
 627         return NULL;
 628
 629     char *psz_url = vlc_path2uri( psz_filename, NULL );
 630     picture_t *p_pic = image_ReadUrl( p_image, psz_url, &fmt_in, &fmt_out );
 631     free( psz_url );
 632     image_HandlerDelete( p_image );
 633
 634     return p_pic;
 635 }
 636
 637 /**
 638  * It loads the logo images into memory.
 639  *
 640  * Read the logo-file input switch, obtaining a list of images and
 641  * associated durations and transparencies. Store the image(s), and
 642  * times. An image without a stated time or opacity will use the
 643  * logo-delay and logo-opacity values.
 644  */
 645 static void LogoListLoad( vlc_object_t *p_this, logo_list_t *p_logo_list,
 646                           const char *psz_filename )
 647 {
 648     char *psz_list; /* the list: <logo>[,[<delay>[,[<alpha>]]]][;...] */
 649     char *psz_original;
 650     logo_t *p_logo;         /* the parsing's result */
 651
 652     p_logo_list->i_counter = 0;
 653     p_logo_list->i_next_pic = 0;
 654
 655     psz_original = psz_list = strdup( psz_filename );
 656     if( !psz_list )
 657         abort();
 658
 659     /* Count the number logos == number of ';' + 1 */
 660     p_logo_list->i_count = 1;
 661     for( unsigned i = 0; i < strlen( psz_list ); i++ )
 662     {
 663         if( psz_list[i] == ';' )
 664             p_logo_list->i_count++;
 665     }
 666
 667     p_logo_list->p_logo =
 668     p_logo              = calloc( p_logo_list->i_count, sizeof(*p_logo) );
 669     if( !p_logo )
 670         abort();
 671
 672     /* Fill the data */
 673     for( unsigned i = 0; i < p_logo_list->i_count; i++ )
 674     {
 675         char *p_c  = strchr( psz_list, ';' );
 676         char *p_c2 = strchr( psz_list, ',' );
 677
 678         p_logo[i].i_alpha = -1; /* use default settings */
 679         p_logo[i].i_delay = -1; /* use default settings */
 680
 681         if( p_c2 && ( p_c2 < p_c || !p_c ) )
 682         {
 683             /* <logo>,<delay>[,<alpha>] type */
 684             if( p_c2[1] != ',' && p_c2[1] != ';' && p_c2[1] != '\0' )
 685                 p_logo[i].i_delay = atoi( p_c2+1 );
 686             *p_c2 = '\0';
 687             if( ( p_c2 = strchr( p_c2+1, ',' ) )
 688                 && ( p_c2 < p_c || !p_c ) && p_c2[1] != ';' && p_c2[1] != '\0' )
 689                 p_logo[i].i_alpha = atoi( p_c2 + 1 );
 690         }
 691         else
 692         {
 693             /* <logo> type */
 694             if( p_c )
 695                 *p_c = '\0';
 696         }
 697
 698         msg_Dbg( p_this, "logo file name %s, delay %d, alpha %d",
 699                  psz_list, p_logo[i].i_delay, p_logo[i].i_alpha );
 700         p_logo[i].p_pic = LoadImage( p_this, psz_list );
 701         if( !p_logo[i].p_pic )
 702         {
 703             msg_Warn( p_this, "error while loading logo %s, will be skipped",
 704                       psz_list );
 705         }
 706
 707         if( p_c )
 708             psz_list = &p_c[1];
 709     }
 710
 711     /* initialize so that on the first update it will wrap back to 0 */
 712     p_logo_list->i_counter = p_logo_list->i_count - 1;
 713
 714     free( psz_original );
 715 }
 716
 717 /**
 718  * Unload a list of logo and release associated ressources.
 719  */
 720 static void LogoListUnload( logo_list_t *p_list )
 721 {
 722     for( unsigned i = 0; i < p_list->i_count; i++ )
 723     {
 724         logo_t *p_logo = &p_list->p_logo[i];
 725
 726         if( p_logo->p_pic )
 727             picture_Release( p_logo->p_pic );
 728     }
 729     free( p_list->p_logo );
 730 }
 731
 732 /**
 733  * Go to the next logo and return its pointer.
 734  */
 735 static logo_t *LogoListNext( logo_list_t *p_list, mtime_t i_date )
 736 {
 737     p_list->i_counter = ( p_list->i_counter + 1 ) % p_list->i_count;
 738
 739     logo_t *p_logo = LogoListCurrent( p_list );
 740
 741     p_list->i_next_pic = i_date + ( p_logo->i_delay != -1 ?
 742                           p_logo->i_delay : p_list->i_delay ) * 1000;
 743     return p_logo;
 744 }
 745 /**
 746  * Return the current logo pointer
 747  */
 748 static logo_t *LogoListCurrent( logo_list_t *p_list )
 749 {
 750     return &p_list->p_logo[p_list->i_counter];
 751 }
 752