git.sesse.net Git - mlt/blob - src/modules/gtk2/producer_pixbuf.c

   1 /*
   2  * producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_producer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_cache.h>
  24 #include <framework/mlt_log.h>
  25 #include <gdk-pixbuf/gdk-pixbuf.h>
  26
  27 #include "config.h"
  28
  29 #ifdef USE_EXIF
  30 #include <libexif/exif-data.h>
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <pthread.h>
  37 #include <math.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <unistd.h>
  41 #include <dirent.h>
  42 #include <ctype.h>
  43
  44 // this protects concurrent access to gdk_pixbuf
  45 static pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;
  46
  47 typedef struct producer_pixbuf_s *producer_pixbuf;
  48
  49 struct producer_pixbuf_s
  50 {
  51         struct mlt_producer_s parent;
  52
  53         // File name list
  54         mlt_properties filenames;
  55         int count;
  56         int image_idx;
  57         int pixbuf_idx;
  58         int width;
  59         int height;
  60         uint8_t *alpha;
  61         uint8_t *image;
  62         mlt_cache_item image_cache;
  63         mlt_cache_item alpha_cache;
  64         mlt_cache_item pixbuf_cache;
  65         GdkPixbuf *pixbuf;
  66         mlt_image_format format;
  67 };
  68
  69 static void load_filenames( producer_pixbuf self, mlt_properties producer_properties );
  70 static int refresh_pixbuf( producer_pixbuf self, mlt_frame frame );
  71 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  72 static void producer_close( mlt_producer parent );
  73
  74 mlt_producer producer_pixbuf_init( char *filename )
  75 {
  76         producer_pixbuf self = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  77         if ( self != NULL && mlt_producer_init( &self->parent, self ) == 0 )
  78         {
  79                 mlt_producer producer = &self->parent;
  80
  81                 // Get the properties interface
  82                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &self->parent );
  83
  84                 // Callback registration
  85                 producer->get_frame = producer_get_frame;
  86                 producer->close = ( mlt_destructor )producer_close;
  87
  88                 // Set the default properties
  89                 mlt_properties_set( properties, "resource", filename );
  90                 mlt_properties_set_int( properties, "ttl", 25 );
  91                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  92                 mlt_properties_set_int( properties, "progressive", 1 );
  93                 mlt_properties_set_int( properties, "seekable", 1 );
  94
  95                 // Validate the resource
  96                 if ( filename )
  97                         load_filenames( self, properties );
  98                 if ( self->count )
  99                 {
 100                         mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 101                         if ( frame )
 102                         {
 103                                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 104                                 mlt_properties_set_data( frame_properties, "producer_pixbuf", self, 0, NULL, NULL );
 105                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 106                                 mlt_properties_set_position( frame_properties, "pixbuf_position", mlt_producer_position( producer ) );
 107                                 refresh_pixbuf( self, frame );
 108                                 mlt_frame_close( frame );
 109                         }
 110                 }
 111                 if ( self->width == 0 )
 112                 {
 113                         producer_close( producer );
 114                         producer = NULL;
 115                 }
 116                 return producer;
 117         }
 118         free( self );
 119         return NULL;
 120 }
 121
 122 static int load_svg( producer_pixbuf self, mlt_properties properties, const char *filename )
 123 {
 124         int result = 0;
 125
 126         // Read xml string
 127         if ( strstr( filename, "<svg" ) )
 128         {
 129                 // Generate a temporary file for the svg
 130                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 131                 int fd = g_mkstemp( fullname );
 132
 133                 if ( fd > -1 )
 134                 {
 135                         // Write the svg into the temp file
 136                         ssize_t remaining_bytes;
 137                         const char *xml = filename;
 138
 139                         // Strip leading crap
 140                         while ( xml[0] != '<' )
 141                                 xml++;
 142
 143                         remaining_bytes = strlen( xml );
 144                         while ( remaining_bytes > 0 )
 145                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 146                         close( fd );
 147
 148                         mlt_properties_set( self->filenames, "0", fullname );
 149
 150                         // Teehe - when the producer closes, delete the temp file and the space allo
 151                         mlt_properties_set_data( properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 152                         result = 1;
 153                 }
 154         }
 155         return result;
 156 }
 157
 158 static int load_sequence( producer_pixbuf self, mlt_properties properties, const char *filename )
 159 {
 160         int result = 0;
 161
 162         // Obtain filenames with pattern
 163         if ( strchr( filename, '%' ) != NULL )
 164         {
 165                 // handle picture sequences
 166                 int i = mlt_properties_get_int( properties, "begin" );
 167                 int gap = 0;
 168                 char full[1024];
 169                 int keyvalue = 0;
 170                 char key[ 50 ];
 171
 172                 while ( gap < 100 )
 173                 {
 174                         struct stat buf;
 175                         snprintf( full, 1023, filename, i ++ );
 176                         if ( stat( full, &buf ) == 0 )
 177                         {
 178                                 sprintf( key, "%d", keyvalue ++ );
 179                                 mlt_properties_set( self->filenames, key, full );
 180                                 gap = 0;
 181                         }
 182                         else
 183                         {
 184                                 gap ++;
 185                         }
 186                 }
 187                 if ( mlt_properties_count( self->filenames ) > 0 )
 188                 {
 189                         mlt_properties_set_int( properties, "ttl", 1 );
 190                         result = 1;
 191                 }
 192         }
 193         return result;
 194 }
 195
 196 static int load_sequence2( producer_pixbuf self, mlt_properties properties, const char *filename )
 197 {
 198         int result = 0;
 199         const char *start;
 200
 201         // Obtain filenames with pattern containing a begin value, e.g. foo%1234d.png
 202         if ( ( start = strchr( filename, '%' ) ) )
 203         {
 204                 const char *end = ++start;
 205                 while ( isdigit( *end ) ) end++;
 206                 if ( end > start && ( end[0] == 'd' || end[0] == 'i' || end[0] == 'u' ) )
 207                 {
 208                         int n = end - start;
 209                         char *s = calloc( 1, n + 1 );
 210                         strncpy( s, start, n );
 211                         mlt_properties_set( properties, "begin", s );
 212                         free( s );
 213                         s = calloc( 1, strlen( filename ) );
 214                         strncpy( s, filename, start - filename );
 215                         sprintf( s + ( start - filename ), ".%d%s", n, end );
 216                         result = load_sequence( self, properties, s );
 217                         free( s );
 218                 }
 219         }
 220         return result;
 221 }
 222
 223 static int load_folder( producer_pixbuf self, mlt_properties properties, const char *filename )
 224 {
 225         int result = 0;
 226
 227         // Obtain filenames with folder
 228         if ( strstr( filename, "/.all." ) != NULL )
 229         {
 230                 char wildcard[ 1024 ];
 231                 char *dir_name = strdup( filename );
 232                 char *extension = strrchr( dir_name, '.' );
 233
 234                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 235                 sprintf( wildcard, "*%s", extension );
 236
 237                 mlt_properties_dir_list( self->filenames, dir_name, wildcard, 1 );
 238
 239                 free( dir_name );
 240                 result = 1;
 241         }
 242         return result;
 243 }
 244
 245 static void load_filenames( producer_pixbuf self, mlt_properties properties )
 246 {
 247         char *filename = mlt_properties_get( properties, "resource" );
 248         self->filenames = mlt_properties_new( );
 249
 250         if (!load_svg( self, properties, filename ) &&
 251                 !load_sequence( self, properties, filename ) &&
 252                 !load_sequence2( self, properties, filename ) &&
 253                 !load_folder( self, properties, filename ) )
 254         {
 255                 mlt_properties_set( self->filenames, "0", filename );
 256         }
 257         self->count = mlt_properties_count( self->filenames );
 258 }
 259
 260 static GdkPixbuf* reorient_with_exif( producer_pixbuf self, int image_idx, GdkPixbuf *pixbuf )
 261 {
 262 #ifdef USE_EXIF
 263         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( &self->parent );
 264         ExifData *d = exif_data_new_from_file( mlt_properties_get_value( self->filenames, image_idx ) );
 265         ExifEntry *entry;
 266         int exif_orientation = 0;
 267
 268         /* get orientation and rotate image accordingly if necessary */
 269         if (d)
 270         {
 271                 if ( ( entry = exif_content_get_entry ( d->ifd[EXIF_IFD_0], EXIF_TAG_ORIENTATION ) ) )
 272                         exif_orientation = exif_get_short (entry->data, exif_data_get_byte_order (d));
 273
 274                 /* Free the EXIF data */
 275                 exif_data_unref(d);
 276         }
 277
 278         // Remember EXIF value, might be useful for someone
 279         mlt_properties_set_int( producer_props, "_exif_orientation" , exif_orientation );
 280
 281         if ( exif_orientation > 1 )
 282         {
 283                 GdkPixbuf *processed = NULL;
 284                 GdkPixbufRotation matrix = GDK_PIXBUF_ROTATE_NONE;
 285
 286                 // Rotate image according to exif data
 287                 switch ( exif_orientation ) {
 288                   case 2:
 289                           processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 290                           break;
 291                   case 3:
 292                           matrix = GDK_PIXBUF_ROTATE_UPSIDEDOWN;
 293                           processed = pixbuf;
 294                           break;
 295                   case 4:
 296                           processed = gdk_pixbuf_flip ( pixbuf, FALSE );
 297                           break;
 298                   case 5:
 299                           matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 300                           processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 301                           break;
 302                   case 6:
 303                           matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 304                           processed = pixbuf;
 305                           break;
 306                   case 7:
 307                           matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 308                           processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 309                           break;
 310                   case 8:
 311                           matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 312                           processed = pixbuf;
 313                           break;
 314                 }
 315                 if ( processed )
 316                 {
 317                         pixbuf = gdk_pixbuf_rotate_simple( processed, matrix );
 318                         g_object_unref( processed );
 319                 }
 320         }
 321 #endif
 322         return pixbuf;
 323 }
 324
 325 static int refresh_pixbuf( producer_pixbuf self, mlt_frame frame )
 326 {
 327         // Obtain properties of frame and producer
 328         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 329         mlt_producer producer = &self->parent;
 330         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 331
 332         // Check if user wants us to reload the image
 333         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 334         {
 335                 self->pixbuf = NULL;
 336                 self->image = NULL;
 337                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 338         }
 339
 340         // Get the time to live for each frame
 341         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 342
 343         // Get the original position of this frame
 344         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 345         position += mlt_producer_get_in( producer );
 346
 347         // Image index
 348         int current_idx = ( int )floor( ( double )position / ttl ) % self->count;
 349
 350         // Key for the cache
 351         char image_key[ 10 ];
 352         sprintf( image_key, "%d", current_idx );
 353
 354         int disable_exif = mlt_properties_get_int( producer_props, "disable_exif" );
 355
 356         if ( current_idx != self->pixbuf_idx )
 357                 self->pixbuf = NULL;
 358         if ( !self->pixbuf || mlt_properties_get_int( producer_props, "_disable_exif" ) != disable_exif )
 359         {
 360                 GError *error = NULL;
 361
 362                 self->image = NULL;
 363                 pthread_mutex_lock( &g_mutex );
 364                 self->pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( self->filenames, current_idx ), &error );
 365                 if ( self->pixbuf )
 366                 {
 367                         // Read the exif value for this file
 368                         if ( !disable_exif )
 369                                 self->pixbuf = reorient_with_exif( self, current_idx, self->pixbuf );
 370
 371                         // Register this pixbuf for destruction and reuse
 372                         mlt_cache_item_close( self->pixbuf_cache );
 373                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf", self->pixbuf, 0, ( mlt_destructor )g_object_unref );
 374                         self->pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 375                         self->pixbuf_idx = current_idx;
 376
 377                         // Store the width/height of the pixbuf temporarily
 378                         self->width = gdk_pixbuf_get_width( self->pixbuf );
 379                         self->height = gdk_pixbuf_get_height( self->pixbuf );
 380
 381                         mlt_events_block( producer_props, NULL );
 382                         mlt_properties_set_int( producer_props, "meta.media.width", self->width );
 383                         mlt_properties_set_int( producer_props, "meta.media.height", self->height );
 384                         mlt_properties_set_int( producer_props, "_disable_exif", disable_exif );
 385                         mlt_events_unblock( producer_props, NULL );
 386
 387                 }
 388                 pthread_mutex_unlock( &g_mutex );
 389         }
 390
 391         // Set width/height of frame
 392         mlt_properties_set_int( properties, "width", self->width );
 393         mlt_properties_set_int( properties, "height", self->height );
 394
 395         return current_idx;
 396 }
 397
 398 static void refresh_image( producer_pixbuf self, mlt_frame frame, mlt_image_format format, int width, int height )
 399 {
 400         // Obtain properties of frame and producer
 401         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 402         mlt_producer producer = &self->parent;
 403
 404         // Get index and pixbuf
 405         int current_idx = refresh_pixbuf( self, frame );
 406
 407         // optimization for subsequent iterations on single picture
 408         if ( current_idx != self->image_idx || width != self->width || height != self->height )
 409                 self->image = NULL;
 410         mlt_log_debug( MLT_PRODUCER_SERVICE( producer ), "image %p pixbuf %p idx %d current_idx %d pixbuf_idx %d width %d\n",
 411                 self->image, self->pixbuf, current_idx, self->image_idx, self->pixbuf_idx, width );
 412
 413         // If we have a pixbuf and we need an image
 414         if ( self->pixbuf && ( !self->image || ( format != mlt_image_none && format != self->format ) ) )
 415         {
 416                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 417                 int interp = GDK_INTERP_BILINEAR;
 418
 419                 if ( strcmp( interps, "nearest" ) == 0 )
 420                         interp = GDK_INTERP_NEAREST;
 421                 else if ( strcmp( interps, "tiles" ) == 0 )
 422                         interp = GDK_INTERP_TILES;
 423                 else if ( strcmp( interps, "hyper" ) == 0 || strcmp( interps, "bicubic" ) == 0 )
 424                         interp = GDK_INTERP_HYPER;
 425
 426                 // Note - the original pixbuf is already safe and ready for destruction
 427                 pthread_mutex_lock( &g_mutex );
 428                 GdkPixbuf* pixbuf = gdk_pixbuf_scale_simple( self->pixbuf, width, height, interp );
 429
 430                 // Store width and height
 431                 self->width = width;
 432                 self->height = height;
 433
 434                 // Allocate/define image
 435                 int has_alpha = gdk_pixbuf_get_has_alpha( pixbuf );
 436                 int src_stride = gdk_pixbuf_get_rowstride( pixbuf );
 437                 int dst_stride = self->width * ( has_alpha ? 4 : 3 );
 438                 int image_size = dst_stride * ( height + 1 );
 439                 self->image = mlt_pool_alloc( image_size );
 440                 self->format = has_alpha ? mlt_image_rgb24a : mlt_image_rgb24;
 441
 442                 if ( src_stride != dst_stride )
 443                 {
 444                         int y = self->height;
 445                         uint8_t *src = gdk_pixbuf_get_pixels( pixbuf );
 446                         uint8_t *dst = self->image;
 447                         while ( y-- )
 448                         {
 449                                 memcpy( dst, src, dst_stride );
 450                                 dst += dst_stride;
 451                                 src += src_stride;
 452                         }
 453                 }
 454                 else
 455                 {
 456                         memcpy( self->image, gdk_pixbuf_get_pixels( pixbuf ), src_stride * height );
 457                 }
 458                 pthread_mutex_unlock( &g_mutex );
 459
 460                 // Convert image to requested format
 461                 if ( format != mlt_image_none && format != self->format )
 462                 {
 463                         uint8_t *buffer = NULL;
 464
 465                         // First, set the image so it can be converted when we get it
 466                         mlt_frame_replace_image( frame, self->image, self->format, width, height );
 467                         mlt_frame_set_image( frame, self->image, image_size, mlt_pool_release );
 468                         self->format = format;
 469
 470                         // get_image will do the format conversion
 471                         mlt_frame_get_image( frame, &buffer, &format, &width, &height, 0 );
 472
 473                         // cache copies of the image and alpha buffers
 474                         if ( buffer )
 475                         {
 476                                 image_size = mlt_image_format_size( format, width, height, NULL );
 477                                 self->image = mlt_pool_alloc( image_size );
 478                                 memcpy( self->image, buffer, image_size );
 479                         }
 480                         if ( ( buffer = mlt_frame_get_alpha_mask( frame ) ) )
 481                         {
 482                                 self->alpha = mlt_pool_alloc( width * height );
 483                                 memcpy( self->alpha, buffer, width * height );
 484                         }
 485                 }
 486
 487                 mlt_cache_item_close( self->image_cache );
 488                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image", self->image, image_size, mlt_pool_release );
 489                 self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 490                 self->image_idx = current_idx;
 491                 mlt_cache_item_close( self->alpha_cache );
 492                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha", self->alpha, width * height, mlt_pool_release );
 493                 self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha" );
 494
 495                 // Finished with pixbuf now
 496                 g_object_unref( pixbuf );
 497         }
 498
 499         // Set width/height of frame
 500         mlt_properties_set_int( properties, "width", self->width );
 501         mlt_properties_set_int( properties, "height", self->height );
 502 }
 503
 504 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 505 {
 506         int error = 0;
 507
 508         // Obtain properties of frame and producer
 509         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 510         producer_pixbuf self = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 511         mlt_producer producer = &self->parent;
 512
 513         // Use the width and height suggested by the rescale filter because we can do our own scaling.
 514         *width = mlt_properties_get_int( properties, "rescale_width" );
 515         *height = mlt_properties_get_int( properties, "rescale_height" );
 516
 517         // Restore pixbuf and image
 518         mlt_service_lock( MLT_PRODUCER_SERVICE( producer ) );
 519         self->pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 520         self->pixbuf = mlt_cache_item_data( self->pixbuf_cache, NULL );
 521         self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 522         self->image = mlt_cache_item_data( self->image_cache, NULL );
 523         self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha" );
 524         self->alpha = mlt_cache_item_data( self->alpha_cache, NULL );
 525
 526         // Refresh the image
 527         refresh_image( self, frame, *format, *width, *height );
 528
 529         // Get width and height (may have changed during the refresh)
 530         *width = self->width;
 531         *height = self->height;
 532         *format = self->format;
 533
 534         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 535         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 536         if ( self->image )
 537         {
 538                 // Clone the image
 539                 int image_size = mlt_image_format_size( self->format, self->width, self->height, NULL );
 540                 uint8_t *image_copy = mlt_pool_alloc( image_size );
 541                 memcpy( image_copy, self->image, image_size );
 542                 // Now update properties so we free the copy after
 543                 mlt_frame_set_image( frame, image_copy, image_size, mlt_pool_release );
 544                 // We're going to pass the copy on
 545                 *buffer = image_copy;
 546                 mlt_log_debug( MLT_PRODUCER_SERVICE( &self->parent ), "%dx%d (%s)\n",
 547                         self->width, self->height, mlt_image_format_name( *format ) );
 548                 // Clone the alpha channel
 549                 if ( self->alpha )
 550                 {
 551                         image_copy = mlt_pool_alloc( self->width * self->height );
 552                         memcpy( image_copy, self->alpha, self->width * self->height );
 553                         mlt_frame_set_alpha( frame, image_copy, self->width * self->height, mlt_pool_release );
 554                 }
 555         }
 556         else
 557         {
 558                 error = 1;
 559         }
 560
 561         // Release references and locks
 562         mlt_cache_item_close( self->pixbuf_cache );
 563         mlt_cache_item_close( self->image_cache );
 564         mlt_cache_item_close( self->alpha_cache );
 565         mlt_service_unlock( MLT_PRODUCER_SERVICE( &self->parent ) );
 566
 567         return error;
 568 }
 569
 570 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 571 {
 572         // Get the real structure for this producer
 573         producer_pixbuf self = producer->child;
 574
 575         // Fetch the producers properties
 576         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 577
 578         if ( self->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 579                 load_filenames( self, producer_properties );
 580
 581         // Generate a frame
 582         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 583
 584         if ( *frame != NULL && self->count > 0 )
 585         {
 586                 // Obtain properties of frame and producer
 587                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 588
 589                 // Set the producer on the frame properties
 590                 mlt_properties_set_data( properties, "producer_pixbuf", self, 0, NULL, NULL );
 591
 592                 // Update timecode on the frame we're creating
 593                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 594
 595                 // Ensure that we have a way to obtain the position in the get_image
 596                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 597
 598                 // Refresh the pixbuf
 599                 self->pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 600                 self->pixbuf = mlt_cache_item_data( self->pixbuf_cache, NULL );
 601                 refresh_pixbuf( self, *frame );
 602                 mlt_cache_item_close( self->pixbuf_cache );
 603
 604                 // Set producer-specific frame properties
 605                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 606
 607                 double force_ratio = mlt_properties_get_double( producer_properties, "force_aspect_ratio" );
 608                 if ( force_ratio > 0.0 )
 609                         mlt_properties_set_double( properties, "aspect_ratio", force_ratio );
 610                 else
 611                         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 612
 613                 // Push the get_image method
 614                 mlt_frame_push_get_image( *frame, producer_get_image );
 615         }
 616
 617         // Calculate the next timecode
 618         mlt_producer_prepare_next( producer );
 619
 620         return 0;
 621 }
 622
 623 static void producer_close( mlt_producer parent )
 624 {
 625         producer_pixbuf self = parent->child;
 626         parent->close = NULL;
 627         mlt_service_cache_purge( MLT_PRODUCER_SERVICE(parent) );
 628         mlt_producer_close( parent );
 629         mlt_properties_close( self->filenames );
 630         free( self );
 631 }