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