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 <gdk-pixbuf/gdk-pixbuf.h>
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <pthread.h>
  29 #include <math.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <unistd.h>
  33 #include <dirent.h>
  34
  35 static pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER;
  36
  37 typedef struct producer_pixbuf_s *producer_pixbuf;
  38
  39 struct producer_pixbuf_s
  40 {
  41         struct mlt_producer_s parent;
  42
  43         // File name list
  44         mlt_properties filenames;
  45         int count;
  46         int image_idx;
  47
  48         int width;
  49         int height;
  50         uint8_t *image;
  51         uint8_t *alpha;
  52 };
  53
  54 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties );
  55 static void refresh_image( mlt_frame frame, int width, int height );
  56 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  57 static void producer_close( mlt_producer parent );
  58
  59 mlt_producer producer_pixbuf_init( char *filename )
  60 {
  61         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  62         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  63         {
  64                 mlt_producer producer = &this->parent;
  65
  66                 // Get the properties interface
  67                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
  68
  69                 // Callback registration
  70                 producer->get_frame = producer_get_frame;
  71                 producer->close = ( mlt_destructor )producer_close;
  72
  73                 // Set the default properties
  74                 mlt_properties_set( properties, "resource", filename );
  75                 mlt_properties_set_int( properties, "ttl", 25 );
  76                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  77                 mlt_properties_set_int( properties, "progressive", 1 );
  78
  79                 // Validate the resource
  80                 if ( filename )
  81                         load_filenames( this, properties );
  82                 if ( this->count )
  83                 {
  84                         mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  85                         if ( frame )
  86                         {
  87                                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  88                                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
  89                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
  90                                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
  91                                 refresh_image( frame, 0, 0 );
  92                                 mlt_frame_close( frame );
  93                         }
  94                 }
  95                 if ( this->width == 0 )
  96                 {
  97                         producer_close( producer );
  98                         producer = NULL;
  99                 }
 100                 return producer;
 101         }
 102         free( this );
 103         return NULL;
 104 }
 105
 106 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties )
 107 {
 108         char *filename = mlt_properties_get( producer_properties, "resource" );
 109         this->filenames = mlt_properties_new( );
 110
 111         // Read xml string
 112         if ( strstr( filename, "<svg" ) )
 113         {
 114                 // Generate a temporary file for the svg
 115                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 116                 int fd = mkstemp( fullname );
 117
 118                 if ( fd > -1 )
 119                 {
 120                         // Write the svg into the temp file
 121                         ssize_t remaining_bytes;
 122                         char *xml = filename;
 123
 124                         // Strip leading crap
 125                         while ( xml[0] != '<' )
 126                                 xml++;
 127
 128                         remaining_bytes = strlen( xml );
 129                         while ( remaining_bytes > 0 )
 130                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 131                         close( fd );
 132
 133                         mlt_properties_set( this->filenames, "0", fullname );
 134
 135                         // Teehe - when the producer closes, delete the temp file and the space allo
 136                         mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 137                 }
 138         }
 139         // Obtain filenames
 140         else if ( strchr( filename, '%' ) != NULL )
 141         {
 142                 // handle picture sequences
 143                 int i = mlt_properties_get_int( producer_properties, "begin" );
 144                 int gap = 0;
 145                 char full[1024];
 146                 int keyvalue = 0;
 147                 char key[ 50 ];
 148
 149                 while ( gap < 100 )
 150                 {
 151                         struct stat buf;
 152                         snprintf( full, 1023, filename, i ++ );
 153                         if ( stat( full, &buf ) == 0 )
 154                         {
 155                                 sprintf( key, "%d", keyvalue ++ );
 156                                 mlt_properties_set( this->filenames, key, full );
 157                                 gap = 0;
 158                         }
 159                         else
 160                         {
 161                                 gap ++;
 162                         }
 163                 }
 164         }
 165         else if ( strstr( filename, "/.all." ) != NULL )
 166         {
 167                 char wildcard[ 1024 ];
 168                 char *dir_name = strdup( filename );
 169                 char *extension = strrchr( dir_name, '.' );
 170
 171                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 172                 sprintf( wildcard, "*%s", extension );
 173
 174                 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 175
 176                 free( dir_name );
 177         }
 178         else
 179         {
 180                 mlt_properties_set( this->filenames, "0", filename );
 181         }
 182
 183         this->count = mlt_properties_count( this->filenames );
 184 }
 185
 186 static void refresh_image( mlt_frame frame, int width, int height )
 187 {
 188         // Pixbuf
 189         GdkPixbuf *pixbuf = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", NULL );
 190         GError *error = NULL;
 191
 192         // Obtain properties of frame
 193         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 194
 195         // Obtain the producer for this frame
 196         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 197
 198         // Obtain the producer
 199         mlt_producer producer = &this->parent;
 200
 201         // Obtain properties of producer
 202         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 203
 204         // Obtain the cache flag and structure
 205         int use_cache = mlt_properties_get_int( producer_props, "cache" );
 206         mlt_properties cache = mlt_properties_get_data( producer_props, "_cache", NULL );
 207         int update_cache = 0;
 208
 209         // Check if user wants us to reload the image
 210         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 211         {
 212                 pixbuf = NULL;
 213                 if ( !use_cache && this->image )
 214                         mlt_pool_release( this->image );
 215                 this->image = NULL;
 216                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 217         }
 218
 219         // Get the time to live for each frame
 220         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 221
 222         // Get the original position of this frame
 223         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 224         position += mlt_producer_get_in( producer );
 225
 226         // Image index
 227         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 228
 229         // Key for the cache
 230         char image_key[ 10 ];
 231         sprintf( image_key, "%d", image_idx );
 232
 233         pthread_mutex_lock( &fastmutex );
 234
 235         // Check if the frame is already loaded
 236         if ( use_cache )
 237         {
 238                 if ( cache == NULL )
 239                 {
 240                         cache = mlt_properties_new( );
 241                         mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
 242                 }
 243
 244                 mlt_frame cached = mlt_properties_get_data( cache, image_key, NULL );
 245
 246                 if ( cached )
 247                 {
 248                         this->image_idx = image_idx;
 249                         mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 250                         this->width = mlt_properties_get_int( cached_props, "width" );
 251                         this->height = mlt_properties_get_int( cached_props, "height" );
 252                         mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
 253                         mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
 254                         this->image = mlt_properties_get_data( cached_props, "image", NULL );
 255                         this->alpha = mlt_properties_get_data( cached_props, "alpha", NULL );
 256
 257                         if ( width != 0 && ( width != this->width || height != this->height ) )
 258                                 this->image = NULL;
 259                 }
 260         }
 261
 262     // optimization for subsequent iterations on single picture
 263         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 264         {
 265                 if ( width != this->width || height != this->height )
 266                 {
 267                         pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
 268                 }
 269         }
 270         else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
 271         {
 272                 this->image_idx = image_idx;
 273                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
 274
 275                 if ( pixbuf != NULL )
 276                 {
 277                         // Register this pixbuf for destruction and reuse
 278                         mlt_events_block( producer_props, NULL );
 279                         mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 280                         g_object_ref( pixbuf );
 281                         mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 282
 283                         mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
 284                         mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
 285                         mlt_events_unblock( producer_props, NULL );
 286
 287                         // Store the width/height of the pixbuf temporarily
 288                         this->width = gdk_pixbuf_get_width( pixbuf );
 289                         this->height = gdk_pixbuf_get_height( pixbuf );
 290                 }
 291         }
 292
 293         // If we have a pixbuf
 294         if ( pixbuf && width > 0 )
 295         {
 296                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 297                 int interp = GDK_INTERP_BILINEAR;
 298
 299                 if ( strcmp( interps, "nearest" ) == 0 )
 300                         interp = GDK_INTERP_NEAREST;
 301                 else if ( strcmp( interps, "tiles" ) == 0 )
 302                         interp = GDK_INTERP_TILES;
 303                 else if ( strcmp( interps, "hyper" ) == 0 )
 304                         interp = GDK_INTERP_HYPER;
 305
 306                 // Note - the original pixbuf is already safe and ready for destruction
 307                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 308
 309                 // Store width and height
 310                 this->width = width;
 311                 this->height = height;
 312
 313                 // Allocate/define image
 314                 if ( !use_cache && this->image )
 315                         mlt_pool_release( this->image );
 316                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 317
 318                 // Extract YUV422 and alpha
 319                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 320                 {
 321                         // Allocate the alpha mask
 322                         if ( !use_cache && this->alpha )
 323                                 mlt_pool_release( this->alpha );
 324                         this->alpha = mlt_pool_alloc( this->width * this->height );
 325
 326                         // Convert the image
 327                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 328                                                                                   this->width, this->height,
 329                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 330                                                                                   this->image, this->alpha );
 331                 }
 332                 else
 333                 {
 334                         // No alpha to extract
 335                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 336                                                                                  this->width, this->height,
 337                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 338                                                                                  this->image );
 339                 }
 340
 341                 // Finished with pixbuf now
 342                 g_object_unref( pixbuf );
 343
 344                 // Ensure we update the cache when we need to
 345                 update_cache = use_cache;
 346         }
 347
 348         // Set width/height of frame
 349         mlt_properties_set_int( properties, "width", this->width );
 350         mlt_properties_set_int( properties, "height", this->height );
 351         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 352         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 353
 354         // pass the image data without destructor
 355         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 356         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 357
 358         if ( update_cache )
 359         {
 360                 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 361                 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 362                 mlt_properties_set_int( cached_props, "width", this->width );
 363                 mlt_properties_set_int( cached_props, "height", this->height );
 364                 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 365                 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 366                 mlt_properties_set_data( cached_props, "image", this->image, this->width * ( this->height + 1 ) * 2, mlt_pool_release, NULL );
 367                 mlt_properties_set_data( cached_props, "alpha", this->alpha, this->width * this->height, mlt_pool_release, NULL );
 368                 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
 369         }
 370
 371         pthread_mutex_unlock( &fastmutex );
 372 }
 373
 374 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 375 {
 376         // Obtain properties of frame
 377         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 378
 379         // We need to know the size of the image to clone it
 380         int image_size = 0;
 381         int alpha_size = 0;
 382
 383         // Alpha channel
 384         uint8_t *alpha = NULL;
 385
 386         *width = mlt_properties_get_int( properties, "rescale_width" );
 387         *height = mlt_properties_get_int( properties, "rescale_height" );
 388
 389         // Refresh the image
 390         refresh_image( frame, *width, *height );
 391
 392         // Get the image
 393         *buffer = mlt_properties_get_data( properties, "image", &image_size );
 394         alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
 395
 396         // Get width and height (may have changed during the refresh)
 397         *width = mlt_properties_get_int( properties, "width" );
 398         *height = mlt_properties_get_int( properties, "height" );
 399
 400         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 401         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 402         if ( *buffer != NULL )
 403         {
 404                 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 405                 {
 406                         // Clone the image and the alpha
 407                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 408                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 409
 410                         memcpy( image_copy, *buffer, image_size );
 411
 412                         // Copy or default the alpha
 413                         if ( alpha != NULL )
 414                                 memcpy( alpha_copy, alpha, alpha_size );
 415                         else
 416                                 memset( alpha_copy, 255, alpha_size );
 417
 418                         // Now update properties so we free the copy after
 419                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 420                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 421
 422                         // We're going to pass the copy on
 423                         *buffer = image_copy;
 424                 }
 425                 else if ( *format == mlt_image_rgb24a )
 426                 {
 427                         // Clone the image and the alpha
 428                         image_size = *width * ( *height + 1 ) * 4;
 429                         alpha_size = *width * ( *height + 1 );
 430                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 431                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 432
 433                         mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
 434
 435                         // Now update properties so we free the copy after
 436                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 437                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 438
 439                         // We're going to pass the copy on
 440                         *buffer = image_copy;
 441                 }
 442
 443         }
 444         else
 445         {
 446                 // TODO: Review all cases of invalid images
 447                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 448                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 449                 *width = 50;
 450                 *height = 50;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 457 {
 458         // Obtain properties of frame
 459         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 460
 461         // Return the alpha mask
 462         return mlt_properties_get_data( properties, "alpha", NULL );
 463 }
 464
 465 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 466 {
 467         // Get the real structure for this producer
 468         producer_pixbuf this = producer->child;
 469
 470         // Fetch the producers properties
 471         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 472
 473         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 474                 load_filenames( this, producer_properties );
 475
 476         // Generate a frame
 477         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 478
 479         if ( *frame != NULL && this->count > 0 )
 480         {
 481                 // Obtain properties of frame and producer
 482                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 483
 484                 // Set the producer on the frame properties
 485                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 486
 487                 // Update timecode on the frame we're creating
 488                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 489
 490                 // Ensure that we have a way to obtain the position in the get_image
 491                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 492
 493                 // Set producer-specific frame properties
 494                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 495                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 496
 497                 // Set alpha call back
 498                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 499
 500                 // Push the get_image method
 501                 mlt_frame_push_get_image( *frame, producer_get_image );
 502         }
 503
 504         // Calculate the next timecode
 505         mlt_producer_prepare_next( producer );
 506
 507         return 0;
 508 }
 509
 510 static void producer_close( mlt_producer parent )
 511 {
 512         producer_pixbuf this = parent->child;
 513         if ( !mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( parent ), "cache" ) )
 514         {
 515                 mlt_pool_release( this->image );
 516                 mlt_pool_release( this->alpha );
 517         }
 518         parent->close = NULL;
 519         mlt_producer_close( parent );
 520         mlt_properties_close( this->filenames );
 521         free( this );
 522 }