research.m1stereo.tv/gitweb/ - melted/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 frame_properties = MLT_FRAME_PROPERTIES( frame );
  88                                 mlt_properties_set_data( frame_properties, "producer_pixbuf", this, 0, NULL, NULL );
  89                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
  90                                 mlt_properties_set_position( frame_properties, "pixbuf_position", mlt_producer_position( producer ) );
  91                                 refresh_image( frame, 0, 0 );
  92                                 mlt_frame_close( frame );
  93                                 mlt_properties_set_data( properties, "_pixbuf", NULL, 0, NULL, NULL );
  94                         }
  95                 }
  96                 if ( this->width == 0 )
  97                 {
  98                         producer_close( producer );
  99                         producer = NULL;
 100                 }
 101                 return producer;
 102         }
 103         free( this );
 104         return NULL;
 105 }
 106
 107 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties )
 108 {
 109         char *filename = mlt_properties_get( producer_properties, "resource" );
 110         this->filenames = mlt_properties_new( );
 111
 112         // Read xml string
 113         if ( strstr( filename, "<svg" ) )
 114         {
 115                 // Generate a temporary file for the svg
 116                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 117                 int fd = mkstemp( fullname );
 118
 119                 if ( fd > -1 )
 120                 {
 121                         // Write the svg into the temp file
 122                         ssize_t remaining_bytes;
 123                         char *xml = filename;
 124
 125                         // Strip leading crap
 126                         while ( xml[0] != '<' )
 127                                 xml++;
 128
 129                         remaining_bytes = strlen( xml );
 130                         while ( remaining_bytes > 0 )
 131                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 132                         close( fd );
 133
 134                         mlt_properties_set( this->filenames, "0", fullname );
 135
 136                         // Teehe - when the producer closes, delete the temp file and the space allo
 137                         mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 138                 }
 139         }
 140         // Obtain filenames
 141         else if ( strchr( filename, '%' ) != NULL )
 142         {
 143                 // handle picture sequences
 144                 int i = mlt_properties_get_int( producer_properties, "begin" );
 145                 int gap = 0;
 146                 char full[1024];
 147                 int keyvalue = 0;
 148                 char key[ 50 ];
 149
 150                 while ( gap < 100 )
 151                 {
 152                         struct stat buf;
 153                         snprintf( full, 1023, filename, i ++ );
 154                         if ( stat( full, &buf ) == 0 )
 155                         {
 156                                 sprintf( key, "%d", keyvalue ++ );
 157                                 mlt_properties_set( this->filenames, key, full );
 158                                 gap = 0;
 159                         }
 160                         else
 161                         {
 162                                 gap ++;
 163                         }
 164                 }
 165         }
 166         else if ( strstr( filename, "/.all." ) != NULL )
 167         {
 168                 char wildcard[ 1024 ];
 169                 char *dir_name = strdup( filename );
 170                 char *extension = strrchr( dir_name, '.' );
 171
 172                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 173                 sprintf( wildcard, "*%s", extension );
 174
 175                 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 176
 177                 free( dir_name );
 178         }
 179         else
 180         {
 181                 mlt_properties_set( this->filenames, "0", filename );
 182         }
 183
 184         this->count = mlt_properties_count( this->filenames );
 185 }
 186
 187 static void refresh_image( mlt_frame frame, int width, int height )
 188 {
 189         // Pixbuf
 190         GdkPixbuf *pixbuf = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", NULL );
 191         GError *error = NULL;
 192
 193         // Obtain properties of frame
 194         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 195
 196         // Obtain the producer for this frame
 197         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 198
 199         // Obtain the producer
 200         mlt_producer producer = &this->parent;
 201
 202         // Obtain properties of producer
 203         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 204
 205         // Obtain the cache flag and structure
 206         int use_cache = mlt_properties_get_int( producer_props, "cache" );
 207         mlt_properties cache = mlt_properties_get_data( producer_props, "_cache", NULL );
 208         int update_cache = 0;
 209
 210         // Check if user wants us to reload the image
 211         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 212         {
 213                 pixbuf = NULL;
 214                 if ( !use_cache && this->image )
 215                         mlt_pool_release( this->image );
 216                 this->image = NULL;
 217                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 218         }
 219
 220         // Get the time to live for each frame
 221         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 222
 223         // Get the original position of this frame
 224         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 225         position += mlt_producer_get_in( producer );
 226
 227         // Image index
 228         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 229
 230         // Key for the cache
 231         char image_key[ 10 ];
 232         sprintf( image_key, "%d", image_idx );
 233
 234         pthread_mutex_lock( &fastmutex );
 235
 236         // Check if the frame is already loaded
 237         if ( use_cache )
 238         {
 239                 if ( cache == NULL )
 240                 {
 241                         cache = mlt_properties_new( );
 242                         mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
 243                 }
 244
 245                 mlt_frame cached = mlt_properties_get_data( cache, image_key, NULL );
 246
 247                 if ( cached )
 248                 {
 249                         this->image_idx = image_idx;
 250                         mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 251                         this->width = mlt_properties_get_int( cached_props, "width" );
 252                         this->height = mlt_properties_get_int( cached_props, "height" );
 253                         mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
 254                         mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
 255                         this->image = mlt_properties_get_data( cached_props, "image", NULL );
 256                         this->alpha = mlt_properties_get_data( cached_props, "alpha", NULL );
 257
 258                         if ( width != 0 && ( width != this->width || height != this->height ) )
 259                                 this->image = NULL;
 260                 }
 261         }
 262
 263     // optimization for subsequent iterations on single picture
 264         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 265         {
 266                 if ( width != this->width || height != this->height )
 267                 {
 268                         pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
 269                 }
 270         }
 271         else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
 272         {
 273                 this->image_idx = image_idx;
 274                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
 275
 276                 if ( pixbuf != NULL )
 277                 {
 278                         // Register this pixbuf for destruction and reuse
 279                         mlt_events_block( producer_props, NULL );
 280                         mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 281                         g_object_ref( pixbuf );
 282                         mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 283
 284                         mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
 285                         mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
 286                         mlt_events_unblock( producer_props, NULL );
 287
 288                         // Store the width/height of the pixbuf temporarily
 289                         this->width = gdk_pixbuf_get_width( pixbuf );
 290                         this->height = gdk_pixbuf_get_height( pixbuf );
 291                 }
 292         }
 293
 294         // If we have a pixbuf
 295         if ( pixbuf && width > 0 )
 296         {
 297                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 298                 int interp = GDK_INTERP_BILINEAR;
 299
 300                 if ( strcmp( interps, "nearest" ) == 0 )
 301                         interp = GDK_INTERP_NEAREST;
 302                 else if ( strcmp( interps, "tiles" ) == 0 )
 303                         interp = GDK_INTERP_TILES;
 304                 else if ( strcmp( interps, "hyper" ) == 0 )
 305                         interp = GDK_INTERP_HYPER;
 306
 307                 // Note - the original pixbuf is already safe and ready for destruction
 308                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 309
 310                 // Store width and height
 311                 this->width = width;
 312                 this->height = height;
 313
 314                 // Allocate/define image
 315                 if ( !use_cache && this->image )
 316                         mlt_pool_release( this->image );
 317                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 318
 319                 // Extract YUV422 and alpha
 320                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 321                 {
 322                         // Allocate the alpha mask
 323                         if ( !use_cache && this->alpha )
 324                                 mlt_pool_release( this->alpha );
 325                         this->alpha = mlt_pool_alloc( this->width * this->height );
 326
 327                         // Convert the image
 328                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 329                                                                                   this->width, this->height,
 330                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 331                                                                                   this->image, this->alpha );
 332                 }
 333                 else
 334                 {
 335                         // No alpha to extract
 336                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 337                                                                                  this->width, this->height,
 338                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 339                                                                                  this->image );
 340                 }
 341
 342                 // Finished with pixbuf now
 343                 g_object_unref( pixbuf );
 344
 345                 // Ensure we update the cache when we need to
 346                 update_cache = use_cache;
 347         }
 348
 349         // Set width/height of frame
 350         mlt_properties_set_int( properties, "width", this->width );
 351         mlt_properties_set_int( properties, "height", this->height );
 352         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 353         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 354
 355         // pass the image data without destructor
 356         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 357         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 358
 359         if ( update_cache )
 360         {
 361                 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 362                 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 363                 mlt_properties_set_int( cached_props, "width", this->width );
 364                 mlt_properties_set_int( cached_props, "height", this->height );
 365                 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 366                 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 367                 mlt_properties_set_data( cached_props, "image", this->image, this->width * ( this->height + 1 ) * 2, mlt_pool_release, NULL );
 368                 mlt_properties_set_data( cached_props, "alpha", this->alpha, this->width * this->height, mlt_pool_release, NULL );
 369                 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
 370         }
 371
 372         pthread_mutex_unlock( &fastmutex );
 373 }
 374
 375 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 376 {
 377         // Obtain properties of frame
 378         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 379
 380         // We need to know the size of the image to clone it
 381         int image_size = 0;
 382         int alpha_size = 0;
 383
 384         // Alpha channel
 385         uint8_t *alpha = NULL;
 386
 387         *width = mlt_properties_get_int( properties, "rescale_width" );
 388         *height = mlt_properties_get_int( properties, "rescale_height" );
 389
 390         // Refresh the image
 391         refresh_image( frame, *width, *height );
 392
 393         // Get the image
 394         *buffer = mlt_properties_get_data( properties, "image", &image_size );
 395         alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
 396
 397         // Get width and height (may have changed during the refresh)
 398         *width = mlt_properties_get_int( properties, "width" );
 399         *height = mlt_properties_get_int( properties, "height" );
 400
 401         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 402         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 403         if ( *buffer != NULL )
 404         {
 405                 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 406                 {
 407                         // Clone the image and the alpha
 408                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 409                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 410
 411                         memcpy( image_copy, *buffer, image_size );
 412
 413                         // Copy or default the alpha
 414                         if ( alpha != NULL )
 415                                 memcpy( alpha_copy, alpha, alpha_size );
 416                         else
 417                                 memset( alpha_copy, 255, alpha_size );
 418
 419                         // Now update properties so we free the copy after
 420                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 421                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 422
 423                         // We're going to pass the copy on
 424                         *buffer = image_copy;
 425                 }
 426                 else if ( *format == mlt_image_rgb24a )
 427                 {
 428                         // Clone the image and the alpha
 429                         image_size = *width * ( *height + 1 ) * 4;
 430                         alpha_size = *width * ( *height + 1 );
 431                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 432                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 433
 434                         mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
 435
 436                         // Now update properties so we free the copy after
 437                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 438                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 439
 440                         // We're going to pass the copy on
 441                         *buffer = image_copy;
 442                 }
 443
 444         }
 445         else
 446         {
 447                 // TODO: Review all cases of invalid images
 448                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 449                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 450                 *width = 50;
 451                 *height = 50;
 452         }
 453
 454         return 0;
 455 }
 456
 457 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 458 {
 459         // Obtain properties of frame
 460         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 461
 462         // Return the alpha mask
 463         return mlt_properties_get_data( properties, "alpha", NULL );
 464 }
 465
 466 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 467 {
 468         // Get the real structure for this producer
 469         producer_pixbuf this = producer->child;
 470
 471         // Fetch the producers properties
 472         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 473
 474         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 475                 load_filenames( this, producer_properties );
 476
 477         // Generate a frame
 478         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 479
 480         if ( *frame != NULL && this->count > 0 )
 481         {
 482                 // Obtain properties of frame and producer
 483                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 484
 485                 // Set the producer on the frame properties
 486                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 487
 488                 // Update timecode on the frame we're creating
 489                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 490
 491                 // Ensure that we have a way to obtain the position in the get_image
 492                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 493
 494                 // Refresh the image
 495                 refresh_image( *frame, 0, 0 );
 496
 497                 // Set producer-specific frame properties
 498                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 499                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 500
 501                 // Set alpha call back
 502                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 503
 504                 // Push the get_image method
 505                 mlt_frame_push_get_image( *frame, producer_get_image );
 506         }
 507
 508         // Calculate the next timecode
 509         mlt_producer_prepare_next( producer );
 510
 511         return 0;
 512 }
 513
 514 static void producer_close( mlt_producer parent )
 515 {
 516         producer_pixbuf this = parent->child;
 517         if ( !mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( parent ), "cache" ) )
 518         {
 519                 mlt_pool_release( this->image );
 520                 mlt_pool_release( this->alpha );
 521         }
 522         parent->close = NULL;
 523         mlt_producer_close( parent );
 524         mlt_properties_close( this->filenames );
 525         free( this );
 526 }