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 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         // Check if user wants us to reload the image
 205         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 206         {
 207                 pixbuf = NULL;
 208                 this->image = NULL;
 209                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 210         }
 211
 212         // Obtain the cache flag and structure
 213         int use_cache = mlt_properties_get_int( producer_props, "cache" );
 214         mlt_properties cache = mlt_properties_get_data( producer_props, "_cache", NULL );
 215         int update_cache = 0;
 216
 217         // Get the time to live for each frame
 218         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 219
 220         // Get the original position of this frame
 221         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 222         position += mlt_producer_get_in( producer );
 223
 224         // Image index
 225         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 226
 227         // Key for the cache
 228         char image_key[ 10 ];
 229         sprintf( image_key, "%d", image_idx );
 230
 231         pthread_mutex_lock( &fastmutex );
 232
 233         // Check if the frame is already loaded
 234         if ( use_cache )
 235         {
 236                 if ( cache == NULL )
 237                 {
 238                         cache = mlt_properties_new( );
 239                         mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
 240                 }
 241
 242                 mlt_frame cached = mlt_properties_get_data( cache, image_key, NULL );
 243
 244                 if ( cached )
 245                 {
 246                         this->image_idx = image_idx;
 247                         mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 248                         this->width = mlt_properties_get_int( cached_props, "width" );
 249                         this->height = mlt_properties_get_int( cached_props, "height" );
 250                         mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
 251                         mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
 252                         this->image = mlt_properties_get_data( cached_props, "image", NULL );
 253                         this->alpha = mlt_properties_get_data( cached_props, "alpha", NULL );
 254
 255                         if ( width != 0 && ( width != this->width || height != this->height ) )
 256                                 this->image = NULL;
 257                 }
 258         }
 259
 260     // optimization for subsequent iterations on single picture
 261         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 262         {
 263                 if ( width != this->width || height != this->height )
 264                 {
 265                         pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
 266                         if ( !use_cache )
 267                         {
 268                                 mlt_pool_release( this->image );
 269                                 mlt_pool_release( this->alpha );
 270                         }
 271                         this->image = NULL;
 272                         this->alpha = NULL;
 273                 }
 274         }
 275         else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
 276         {
 277                 if ( !use_cache )
 278                 {
 279                         mlt_pool_release( this->image );
 280                         mlt_pool_release( this->alpha );
 281                 }
 282                 this->image = NULL;
 283                 this->alpha = NULL;
 284
 285                 this->image_idx = image_idx;
 286                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
 287
 288                 if ( pixbuf != NULL )
 289                 {
 290                         // Register this pixbuf for destruction and reuse
 291                         mlt_events_block( producer_props, NULL );
 292                         mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 293                         g_object_ref( pixbuf );
 294                         mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 295
 296                         mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
 297                         mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
 298                         mlt_events_unblock( producer_props, NULL );
 299
 300                         // Store the width/height of the pixbuf temporarily
 301                         this->width = gdk_pixbuf_get_width( pixbuf );
 302                         this->height = gdk_pixbuf_get_height( pixbuf );
 303                 }
 304         }
 305
 306         // If we have a pixbuf
 307         if ( pixbuf && width > 0 )
 308         {
 309                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 310                 int interp = GDK_INTERP_BILINEAR;
 311
 312                 if ( strcmp( interps, "nearest" ) == 0 )
 313                         interp = GDK_INTERP_NEAREST;
 314                 else if ( strcmp( interps, "tiles" ) == 0 )
 315                         interp = GDK_INTERP_TILES;
 316                 else if ( strcmp( interps, "hyper" ) == 0 )
 317                         interp = GDK_INTERP_HYPER;
 318
 319                 // Note - the original pixbuf is already safe and ready for destruction
 320                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 321
 322                 // Store width and height
 323                 this->width = width;
 324                 this->height = height;
 325
 326                 // Allocate/define image
 327                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 328
 329                 // Extract YUV422 and alpha
 330                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 331                 {
 332                         // Allocate the alpha mask
 333                         this->alpha = mlt_pool_alloc( this->width * this->height );
 334
 335                         // Convert the image
 336                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 337                                                                                   this->width, this->height,
 338                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 339                                                                                   this->image, this->alpha );
 340                 }
 341                 else
 342                 {
 343                         // No alpha to extract
 344                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 345                                                                                  this->width, this->height,
 346                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 347                                                                                  this->image );
 348                 }
 349
 350                 // Finished with pixbuf now
 351                 g_object_unref( pixbuf );
 352
 353                 // Ensure we update the cache when we need to
 354                 update_cache = use_cache;
 355         }
 356
 357         // Set width/height of frame
 358         mlt_properties_set_int( properties, "width", this->width );
 359         mlt_properties_set_int( properties, "height", this->height );
 360         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 361         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 362
 363         // pass the image data without destructor
 364         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 365         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 366
 367         if ( update_cache )
 368         {
 369                 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 370                 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 371                 mlt_properties_set_int( cached_props, "width", this->width );
 372                 mlt_properties_set_int( cached_props, "height", this->height );
 373                 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 374                 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 375                 mlt_properties_set_data( cached_props, "image", this->image, this->width * ( this->height + 1 ) * 2, mlt_pool_release, NULL );
 376                 mlt_properties_set_data( cached_props, "alpha", this->alpha, this->width * this->height, mlt_pool_release, NULL );
 377                 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
 378         }
 379
 380         pthread_mutex_unlock( &fastmutex );
 381 }
 382
 383 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 384 {
 385         // Obtain properties of frame
 386         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 387
 388         // We need to know the size of the image to clone it
 389         int image_size = 0;
 390         int alpha_size = 0;
 391
 392         // Alpha channel
 393         uint8_t *alpha = NULL;
 394
 395         *width = mlt_properties_get_int( properties, "rescale_width" );
 396         *height = mlt_properties_get_int( properties, "rescale_height" );
 397
 398         // Refresh the image
 399         refresh_image( frame, *width, *height );
 400
 401         // Get the image
 402         *buffer = mlt_properties_get_data( properties, "image", &image_size );
 403         alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
 404
 405         // Get width and height (may have changed during the refresh)
 406         *width = mlt_properties_get_int( properties, "width" );
 407         *height = mlt_properties_get_int( properties, "height" );
 408
 409         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 410         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 411         if ( *buffer != NULL )
 412         {
 413                 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 414                 {
 415                         // Clone the image and the alpha
 416                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 417                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 418
 419                         memcpy( image_copy, *buffer, image_size );
 420
 421                         // Copy or default the alpha
 422                         if ( alpha != NULL )
 423                                 memcpy( alpha_copy, alpha, alpha_size );
 424                         else
 425                                 memset( alpha_copy, 255, alpha_size );
 426
 427                         // Now update properties so we free the copy after
 428                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 429                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 430
 431                         // We're going to pass the copy on
 432                         *buffer = image_copy;
 433                 }
 434                 else if ( *format == mlt_image_rgb24a )
 435                 {
 436                         // Clone the image and the alpha
 437                         image_size = *width * ( *height + 1 ) * 4;
 438                         alpha_size = *width * ( *height + 1 );
 439                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 440                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 441
 442                         mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
 443
 444                         // Now update properties so we free the copy after
 445                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 446                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 447
 448                         // We're going to pass the copy on
 449                         *buffer = image_copy;
 450                 }
 451
 452         }
 453         else
 454         {
 455                 // TODO: Review all cases of invalid images
 456                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 457                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 458                 *width = 50;
 459                 *height = 50;
 460         }
 461
 462         return 0;
 463 }
 464
 465 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 466 {
 467         // Obtain properties of frame
 468         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 469
 470         // Return the alpha mask
 471         return mlt_properties_get_data( properties, "alpha", NULL );
 472 }
 473
 474 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 475 {
 476         // Get the real structure for this producer
 477         producer_pixbuf this = producer->child;
 478
 479         // Fetch the producers properties
 480         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 481
 482         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 483                 load_filenames( this, producer_properties );
 484
 485         // Generate a frame
 486         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 487
 488         if ( *frame != NULL && this->count > 0 )
 489         {
 490                 // Obtain properties of frame and producer
 491                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 492
 493                 // Set the producer on the frame properties
 494                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 495
 496                 // Update timecode on the frame we're creating
 497                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 498
 499                 // Ensure that we have a way to obtain the position in the get_image
 500                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 501
 502                 // Refresh the image
 503                 refresh_image( *frame, 0, 0 );
 504
 505                 // Set producer-specific frame properties
 506                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 507                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 508
 509                 // Set alpha call back
 510                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 511
 512                 // Push the get_image method
 513                 mlt_frame_push_get_image( *frame, producer_get_image );
 514         }
 515
 516         // Calculate the next timecode
 517         mlt_producer_prepare_next( producer );
 518
 519         return 0;
 520 }
 521
 522 static void producer_close( mlt_producer parent )
 523 {
 524         producer_pixbuf this = parent->child;
 525         if ( !mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( parent ), "cache" ) )
 526         {
 527                 mlt_pool_release( this->image );
 528                 mlt_pool_release( this->alpha );
 529         }
 530         parent->close = NULL;
 531         mlt_producer_close( parent );
 532         mlt_properties_close( this->filenames );
 533         free( this );
 534 }