modules/spu/logo.c

   1 /*****************************************************************************
   2  * logo.c : logo video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2003-2006 VLC authors and VideoLAN
   5  *
   6  * Authors: Gildas Bazin <gbazin@videolan.org>
   7  *          Simon Latapie <garf@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31 #include <assert.h>
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_filter.h>
  36 #include <vlc_mouse.h>
  37 #include <vlc_subpicture.h>
  38 #include <vlc_url.h>
  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)
  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 filter", 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     vlc_tick_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 typedef struct
 154 {
 155     vlc_blender_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 } filter_sys_t;
 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 *, vlc_tick_t );
 190 static picture_t    *FilterVideo( filter_t *, picture_t * );
 191
 192 static int Mouse( filter_t *, 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, vlc_tick_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     LogoListUnload( &p_sys->list );
 325     free( p_sys );
 326 }
 327
 328 /**
 329  * Sub source
 330  */
 331 static subpicture_t *FilterSub( filter_t *p_filter, vlc_tick_t date )
 332 {
 333     filter_sys_t *p_sys = p_filter->p_sys;
 334     logo_list_t *p_list = &p_sys->list;
 335
 336     subpicture_t *p_spu;
 337     subpicture_region_t *p_region;
 338     video_format_t fmt;
 339     picture_t *p_pic;
 340     logo_t *p_logo;
 341
 342     vlc_mutex_lock( &p_sys->lock );
 343     /* Basic test:  b_spu_update occurs on a dynamic change,
 344                     & i_next_pic is the general timer, when to
 345                     look at updating the logo image */
 346
 347     if( ( !p_sys->b_spu_update && p_list->i_next_pic > date ) ||
 348         !p_list->i_repeat )
 349     {
 350         vlc_mutex_unlock( &p_sys->lock );
 351         return NULL;
 352     }
 353
 354     /* adjust index to the next logo */
 355     p_logo = LogoListNext( p_list, date );
 356     p_sys->b_spu_update = false;
 357
 358     p_pic = p_logo->p_pic;
 359
 360     /* Allocate the subpicture internal data. */
 361     p_spu = filter_NewSubpicture( p_filter );
 362     if( !p_spu )
 363         goto exit;
 364
 365     p_spu->b_absolute = p_sys->b_absolute;
 366     p_spu->i_start = date;
 367     p_spu->i_stop = 0;
 368     p_spu->b_ephemer = true;
 369
 370     /* Send an empty subpicture to clear the display when needed */
 371     if( p_list->i_repeat != -1 && p_list->i_counter == 0 )
 372     {
 373         p_list->i_repeat--;
 374         if( p_list->i_repeat < 0 )
 375             goto exit;
 376     }
 377     if( !p_pic || !p_logo->i_alpha ||
 378         ( p_logo->i_alpha == -1 && !p_list->i_alpha ) )
 379         goto exit;
 380
 381     /* Create new SPU region */
 382     video_format_Init( &fmt, VLC_CODEC_YUVA );
 383     fmt.i_sar_num = fmt.i_sar_den = 1;
 384     fmt.i_width = fmt.i_visible_width = p_pic->p[Y_PLANE].i_visible_pitch;
 385     fmt.i_height = fmt.i_visible_height = p_pic->p[Y_PLANE].i_visible_lines;
 386     fmt.i_x_offset = fmt.i_y_offset = 0;
 387     fmt.transfer    = p_pic->format.transfer;
 388     fmt.primaries   = p_pic->format.primaries;
 389     fmt.space       = p_pic->format.space;
 390     fmt.color_range = p_pic->format.color_range;
 391     p_region = subpicture_region_New( &fmt );
 392     if( !p_region )
 393     {
 394         msg_Err( p_filter, "cannot allocate SPU region" );
 395         subpicture_Delete( p_spu );
 396         p_spu = NULL;
 397         goto exit;
 398     }
 399
 400     /* */
 401     picture_Copy( p_region->p_picture, p_pic );
 402
 403     /*  where to locate the logo: */
 404     if( p_sys->i_pos < 0 )
 405     {   /*  set to an absolute xy */
 406         p_region->i_align = SUBPICTURE_ALIGN_RIGHT | SUBPICTURE_ALIGN_TOP;
 407         p_spu->b_absolute = true;
 408     }
 409     else
 410     {   /* set to one of the 9 relative locations */
 411         p_region->i_align = p_sys->i_pos;
 412         p_spu->b_absolute = false;
 413     }
 414
 415     p_region->i_x = p_sys->i_pos_x > 0 ? p_sys->i_pos_x : 0;
 416     p_region->i_y = p_sys->i_pos_y > 0 ? p_sys->i_pos_y : 0;
 417
 418     p_spu->p_region = p_region;
 419
 420     p_spu->i_alpha = ( p_logo->i_alpha != -1 ?
 421                        p_logo->i_alpha : p_list->i_alpha );
 422
 423 exit:
 424     vlc_mutex_unlock( &p_sys->lock );
 425
 426     return p_spu;
 427 }
 428
 429 /**
 430  * Video filter
 431  */
 432 static picture_t *FilterVideo( filter_t *p_filter, picture_t *p_src )
 433 {
 434     filter_sys_t *p_sys = p_filter->p_sys;
 435     logo_list_t *p_list = &p_sys->list;
 436
 437     picture_t *p_dst = filter_NewPicture( p_filter );
 438     if( !p_dst )
 439         goto exit;
 440
 441     picture_Copy( p_dst, p_src );
 442
 443     /* */
 444     vlc_mutex_lock( &p_sys->lock );
 445
 446     logo_t *p_logo;
 447     if( p_list->i_next_pic < p_src->date )
 448         p_logo = LogoListNext( p_list, p_src->date );
 449     else
 450         p_logo = LogoListCurrent( p_list );
 451
 452     /* */
 453     const picture_t *p_pic = p_logo->p_pic;
 454     if( p_pic )
 455     {
 456         const video_format_t *p_fmt = &p_pic->format;
 457         const int i_dst_w = p_filter->fmt_out.video.i_visible_width;
 458         const int i_dst_h = p_filter->fmt_out.video.i_visible_height;
 459
 460         if( p_sys->i_pos )
 461         {
 462             if( p_sys->i_pos & SUBPICTURE_ALIGN_BOTTOM )
 463             {
 464                 p_sys->i_pos_y = i_dst_h - p_fmt->i_visible_height;
 465             }
 466             else if ( !(p_sys->i_pos & SUBPICTURE_ALIGN_TOP) )
 467             {
 468                 p_sys->i_pos_y = ( i_dst_h - p_fmt->i_visible_height ) / 2;
 469             }
 470             else
 471             {
 472                 p_sys->i_pos_y = 0;
 473             }
 474
 475             if( p_sys->i_pos & SUBPICTURE_ALIGN_RIGHT )
 476             {
 477                 p_sys->i_pos_x = i_dst_w - p_fmt->i_visible_width;
 478             }
 479             else if ( !(p_sys->i_pos & SUBPICTURE_ALIGN_LEFT) )
 480             {
 481                 p_sys->i_pos_x = ( i_dst_w - p_fmt->i_visible_width ) / 2;
 482             }
 483             else
 484             {
 485                 p_sys->i_pos_x = 0;
 486             }
 487         }
 488
 489         if( p_sys->i_pos_x < 0 || p_sys->i_pos_y < 0 )
 490         {
 491             msg_Warn( p_filter,
 492                 "logo(%ix%i) doesn't fit into video(%ix%i)",
 493                 p_fmt->i_visible_width, p_fmt->i_visible_height,
 494                 i_dst_w,i_dst_h );
 495             p_sys->i_pos_x = (p_sys->i_pos_x > 0) ? p_sys->i_pos_x : 0;
 496             p_sys->i_pos_y = (p_sys->i_pos_y > 0) ? p_sys->i_pos_y : 0;
 497         }
 498
 499         /* */
 500         const int i_alpha = p_logo->i_alpha != -1 ? p_logo->i_alpha : p_list->i_alpha;
 501         if( filter_ConfigureBlend( p_sys->p_blend, i_dst_w, i_dst_h, p_fmt ) ||
 502             filter_Blend( p_sys->p_blend, p_dst, p_sys->i_pos_x, p_sys->i_pos_y,
 503                           p_pic, i_alpha ) )
 504         {
 505             msg_Err( p_filter, "failed to blend a picture" );
 506         }
 507     }
 508     vlc_mutex_unlock( &p_sys->lock );
 509
 510 exit:
 511     picture_Release( p_src );
 512     return p_dst;
 513 }
 514
 515 static int Mouse( filter_t *p_filter, vlc_mouse_t *p_new,
 516                   const vlc_mouse_t *p_old )
 517 {
 518     filter_sys_t *p_sys = p_filter->p_sys;
 519
 520     vlc_mutex_lock( &p_sys->lock );
 521     logo_t *p_logo = LogoListCurrent( &p_sys->list );
 522     const picture_t *p_pic = p_logo->p_pic;
 523
 524     if( p_pic )
 525     {
 526         const video_format_t *p_fmt = &p_pic->format;
 527         const int i_logo_w = p_fmt->i_visible_width;
 528         const int i_logo_h = p_fmt->i_visible_height;
 529
 530         /* Check if we are over the logo */
 531         const bool b_over = p_new->i_x >= p_sys->i_pos_x &&
 532                             p_new->i_x <  p_sys->i_pos_x + i_logo_w &&
 533                             p_new->i_y >= p_sys->i_pos_y &&
 534                             p_new->i_y <  p_sys->i_pos_y + i_logo_h;
 535
 536         if( b_over && vlc_mouse_HasPressed( p_old, p_new, MOUSE_BUTTON_LEFT ) )
 537             p_sys->b_mouse_grab = true;
 538         else if( vlc_mouse_HasReleased( p_old, p_new, MOUSE_BUTTON_LEFT ) )
 539             p_sys->b_mouse_grab = false;
 540
 541         if( p_sys->b_mouse_grab )
 542         {
 543             int i_dx, i_dy;
 544             vlc_mouse_GetMotion( &i_dx, &i_dy, p_old, p_new );
 545             p_sys->i_pos_x = VLC_CLIP( p_sys->i_pos_x + i_dx, 0,
 546                                     (int)p_filter->fmt_in.video.i_width  - i_logo_w );
 547             p_sys->i_pos_y = VLC_CLIP( p_sys->i_pos_y + i_dy, 0,
 548                                     (int)p_filter->fmt_in.video.i_height - i_logo_h );
 549         }
 550
 551         if( p_sys->b_mouse_grab || b_over )
 552         {
 553             vlc_mutex_unlock( &p_sys->lock );
 554             return VLC_EGENERIC;
 555         }
 556     }
 557     vlc_mutex_unlock( &p_sys->lock );
 558
 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     image_handler_t *p_image = image_HandlerCreate( p_this );
 613     if( !p_image )
 614         return NULL;
 615
 616     video_format_t fmt_out;
 617     video_format_Init( &fmt_out, VLC_CODEC_YUVA );
 618
 619     char *psz_url = vlc_path2uri( psz_filename, NULL );
 620     picture_t *p_pic = image_ReadUrl( p_image, psz_url, &fmt_out );
 621     free( psz_url );
 622     image_HandlerDelete( p_image );
 623     video_format_Clean( &fmt_out );
 624
 625     return p_pic;
 626 }
 627
 628 /**
 629  * It loads the logo images into memory.
 630  *
 631  * Read the logo-file input switch, obtaining a list of images and
 632  * associated durations and transparencies. Store the image(s), and
 633  * times. An image without a stated time or opacity will use the
 634  * logo-delay and logo-opacity values.
 635  */
 636 static void LogoListLoad( vlc_object_t *p_this, logo_list_t *p_logo_list,
 637                           const char *psz_filename )
 638 {
 639     char *psz_list; /* the list: <logo>[,[<delay>[,[<alpha>]]]][;...] */
 640     char *psz_original;
 641     logo_t *p_logo;         /* the parsing's result */
 642
 643     p_logo_list->i_counter = 0;
 644     p_logo_list->i_next_pic = 0;
 645
 646     psz_original = psz_list = strdup( psz_filename );
 647
 648     if( !psz_list )
 649         return;
 650
 651     /* Count the number logos == number of ';' + 1 */
 652     p_logo_list->i_count = 1;
 653     for( unsigned i = 0; i < strlen( psz_list ); i++ )
 654     {
 655         if( psz_list[i] == ';' )
 656             p_logo_list->i_count++;
 657     }
 658
 659     p_logo_list->p_logo =
 660     p_logo              = calloc( p_logo_list->i_count, sizeof(*p_logo) );
 661
 662     if( !p_logo )
 663     {
 664         free( psz_list );
 665         return;
 666     }
 667
 668     /* Fill the data */
 669     for( unsigned i = 0; i < p_logo_list->i_count; i++ )
 670     {
 671         char *p_c  = strchr( psz_list, ';' );
 672         char *p_c2 = strchr( psz_list, ',' );
 673
 674         p_logo[i].i_alpha = -1; /* use default settings */
 675         p_logo[i].i_delay = -1; /* use default settings */
 676
 677         if( p_c2 && ( p_c2 < p_c || !p_c ) )
 678         {
 679             /* <logo>,<delay>[,<alpha>] type */
 680             if( p_c2[1] != ',' && p_c2[1] != ';' && p_c2[1] != '\0' )
 681                 p_logo[i].i_delay = atoi( p_c2+1 );
 682             *p_c2 = '\0';
 683             if( ( p_c2 = strchr( p_c2+1, ',' ) )
 684                 && ( p_c2 < p_c || !p_c ) && p_c2[1] != ';' && p_c2[1] != '\0' )
 685                 p_logo[i].i_alpha = atoi( p_c2 + 1 );
 686         }
 687         else
 688         {
 689             /* <logo> type */
 690             if( p_c )
 691                 *p_c = '\0';
 692         }
 693
 694         msg_Dbg( p_this, "logo file name %s, delay %d, alpha %d",
 695                  psz_list, p_logo[i].i_delay, p_logo[i].i_alpha );
 696         p_logo[i].p_pic = LoadImage( p_this, psz_list );
 697         if( !p_logo[i].p_pic )
 698         {
 699             msg_Warn( p_this, "error while loading logo %s, will be skipped",
 700                       psz_list );
 701         }
 702
 703         if( p_c )
 704             psz_list = &p_c[1];
 705     }
 706
 707     /* initialize so that on the first update it will wrap back to 0 */
 708     p_logo_list->i_counter = p_logo_list->i_count - 1;
 709
 710     free( psz_original );
 711 }
 712
 713 /**
 714  * Unload a list of logo and release associated ressources.
 715  */
 716 static void LogoListUnload( logo_list_t *p_list )
 717 {
 718     for( unsigned i = 0; i < p_list->i_count; i++ )
 719     {
 720         logo_t *p_logo = &p_list->p_logo[i];
 721
 722         if( p_logo->p_pic )
 723             picture_Release( p_logo->p_pic );
 724     }
 725     free( p_list->p_logo );
 726 }
 727
 728 /**
 729  * Go to the next logo and return its pointer.
 730  */
 731 static logo_t *LogoListNext( logo_list_t *p_list, vlc_tick_t i_date )
 732 {
 733     p_list->i_counter = ( p_list->i_counter + 1 ) % p_list->i_count;
 734
 735     logo_t *p_logo = LogoListCurrent( p_list );
 736
 737     p_list->i_next_pic = i_date + VLC_TICK_FROM_MS( p_logo->i_delay != -1 ?
 738                           p_logo->i_delay : p_list->i_delay );
 739     return p_logo;
 740 }
 741 /**
 742  * Return the current logo pointer
 743  */
 744 static logo_t *LogoListCurrent( logo_list_t *p_list )
 745 {
 746     return &p_list->p_logo[p_list->i_counter];
 747 }
 748