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 <framework/mlt_cache.h>
  24 #include <gdk-pixbuf/gdk-pixbuf.h>
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <math.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34 #include <dirent.h>
  35
  36 static pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;
  37
  38 typedef struct producer_pixbuf_s *producer_pixbuf;
  39
  40 struct producer_pixbuf_s
  41 {
  42         struct mlt_producer_s parent;
  43
  44         // File name list
  45         mlt_properties filenames;
  46         int count;
  47         int image_idx;
  48
  49         int width;
  50         int height;
  51         uint8_t *image;
  52         uint8_t *alpha;
  53         mlt_cache_item image_cache;
  54         mlt_cache_item alpha_cache;
  55         pthread_mutex_t mutex;
  56 };
  57
  58 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties );
  59 static void refresh_image( producer_pixbuf this, mlt_frame frame, int width, int height );
  60 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  61 static void producer_close( mlt_producer parent );
  62
  63 mlt_producer producer_pixbuf_init( char *filename )
  64 {
  65         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  66         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  67         {
  68                 mlt_producer producer = &this->parent;
  69
  70                 // Get the properties interface
  71                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
  72
  73                 // Callback registration
  74                 producer->get_frame = producer_get_frame;
  75                 producer->close = ( mlt_destructor )producer_close;
  76
  77                 // Set the default properties
  78                 mlt_properties_set( properties, "resource", filename );
  79                 mlt_properties_set_int( properties, "ttl", 25 );
  80                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  81                 mlt_properties_set_int( properties, "progressive", 1 );
  82
  83                 // Validate the resource
  84                 if ( filename )
  85                         load_filenames( this, properties );
  86                 if ( this->count )
  87                 {
  88                         mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  89                         if ( frame )
  90                         {
  91                                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
  92                                 pthread_mutex_init( &this->mutex, NULL );
  93                                 mlt_properties_set_data( frame_properties, "producer_pixbuf", this, 0, NULL, NULL );
  94                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
  95                                 mlt_properties_set_position( frame_properties, "pixbuf_position", mlt_producer_position( producer ) );
  96                                 refresh_image( this, frame, 0, 0 );
  97                                 mlt_frame_close( frame );
  98                         }
  99                 }
 100                 if ( this->width == 0 )
 101                 {
 102                         producer_close( producer );
 103                         producer = NULL;
 104                 }
 105                 return producer;
 106         }
 107         free( this );
 108         return NULL;
 109 }
 110
 111 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties )
 112 {
 113         char *filename = mlt_properties_get( producer_properties, "resource" );
 114         this->filenames = mlt_properties_new( );
 115
 116         // Read xml string
 117         if ( strstr( filename, "<svg" ) )
 118         {
 119                 // Generate a temporary file for the svg
 120                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 121                 int fd = mkstemp( fullname );
 122
 123                 if ( fd > -1 )
 124                 {
 125                         // Write the svg into the temp file
 126                         ssize_t remaining_bytes;
 127                         char *xml = filename;
 128
 129                         // Strip leading crap
 130                         while ( xml[0] != '<' )
 131                                 xml++;
 132
 133                         remaining_bytes = strlen( xml );
 134                         while ( remaining_bytes > 0 )
 135                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 136                         close( fd );
 137
 138                         mlt_properties_set( this->filenames, "0", fullname );
 139
 140                         // Teehe - when the producer closes, delete the temp file and the space allo
 141                         mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 142                 }
 143         }
 144         // Obtain filenames
 145         else if ( strchr( filename, '%' ) != NULL )
 146         {
 147                 // handle picture sequences
 148                 int i = mlt_properties_get_int( producer_properties, "begin" );
 149                 int gap = 0;
 150                 char full[1024];
 151                 int keyvalue = 0;
 152                 char key[ 50 ];
 153
 154                 while ( gap < 100 )
 155                 {
 156                         struct stat buf;
 157                         snprintf( full, 1023, filename, i ++ );
 158                         if ( stat( full, &buf ) == 0 )
 159                         {
 160                                 sprintf( key, "%d", keyvalue ++ );
 161                                 mlt_properties_set( this->filenames, key, full );
 162                                 gap = 0;
 163                         }
 164                         else
 165                         {
 166                                 gap ++;
 167                         }
 168                 }
 169         }
 170         else if ( strstr( filename, "/.all." ) != NULL )
 171         {
 172                 char wildcard[ 1024 ];
 173                 char *dir_name = strdup( filename );
 174                 char *extension = strrchr( dir_name, '.' );
 175
 176                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 177                 sprintf( wildcard, "*%s", extension );
 178
 179                 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 180
 181                 free( dir_name );
 182         }
 183         else
 184         {
 185                 mlt_properties_set( this->filenames, "0", filename );
 186         }
 187
 188         this->count = mlt_properties_count( this->filenames );
 189 }
 190
 191 static void refresh_image( producer_pixbuf this, mlt_frame frame, int width, int height )
 192 {
 193         // Obtain properties of frame
 194         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 195
 196         // Obtain the producer
 197         mlt_producer producer = &this->parent;
 198
 199         // Obtain properties of producer
 200         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 201
 202         // Obtain the cache flag and structure
 203         int use_cache = mlt_properties_get_int( producer_props, "cache" );
 204         mlt_properties cache = mlt_properties_get_data( producer_props, "_cache", NULL );
 205         int update_cache = 0;
 206
 207         // restore GdkPixbuf
 208         pthread_mutex_lock( &this->mutex );
 209         mlt_cache_item pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 210         GdkPixbuf *pixbuf = mlt_cache_item_data( pixbuf_cache, NULL );
 211         GError *error = NULL;
 212
 213         // restore scaled image
 214         this->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 215         this->image = mlt_cache_item_data( this->image_cache, NULL );
 216
 217         // restore alpha channel
 218         this->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha" );
 219         this->alpha = mlt_cache_item_data( this->alpha_cache, NULL );
 220
 221         // Check if user wants us to reload the image
 222         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 223         {
 224                 pixbuf = NULL;
 225                 this->image = NULL;
 226                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 227         }
 228
 229         // Get the time to live for each frame
 230         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 231
 232         // Get the original position of this frame
 233         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 234         position += mlt_producer_get_in( producer );
 235
 236         // Image index
 237         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 238
 239         // Key for the cache
 240         char image_key[ 10 ];
 241         sprintf( image_key, "%d", image_idx );
 242
 243         pthread_mutex_lock( &g_mutex );
 244
 245         // Check if the frame is already loaded
 246         if ( use_cache )
 247         {
 248                 if ( cache == NULL )
 249                 {
 250                         cache = mlt_properties_new( );
 251                         mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
 252                 }
 253
 254                 mlt_frame cached = mlt_properties_get_data( cache, image_key, NULL );
 255
 256                 if ( cached )
 257                 {
 258                         this->image_idx = image_idx;
 259                         mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 260                         this->width = mlt_properties_get_int( cached_props, "width" );
 261                         this->height = mlt_properties_get_int( cached_props, "height" );
 262                         mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
 263                         mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
 264                         this->image = mlt_properties_get_data( cached_props, "image", NULL );
 265                         this->alpha = mlt_properties_get_data( cached_props, "alpha", NULL );
 266
 267                         if ( width != 0 && ( width != this->width || height != this->height ) )
 268                                 this->image = NULL;
 269                 }
 270         }
 271
 272     // optimization for subsequent iterations on single picture
 273         if ( width != 0 && ( image_idx != this->image_idx || width != this->width || height != this->height ) )
 274                 this->image = NULL;
 275         if ( image_idx != this->image_idx )
 276                 pixbuf = NULL;
 277         if ( pixbuf == NULL && ( width == 0 || this->image == NULL ) )
 278         {
 279                 this->image = NULL;
 280                 this->image_idx = image_idx;
 281                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
 282
 283                 if ( pixbuf )
 284                 {
 285                         // Register this pixbuf for destruction and reuse
 286                         mlt_cache_item_close( pixbuf_cache );
 287                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref );
 288                         pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 289
 290                         mlt_events_block( producer_props, NULL );
 291                         mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
 292                         mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
 293                         mlt_events_unblock( producer_props, NULL );
 294
 295                         // Store the width/height of the pixbuf temporarily
 296                         this->width = gdk_pixbuf_get_width( pixbuf );
 297                         this->height = gdk_pixbuf_get_height( pixbuf );
 298                 }
 299         }
 300
 301         // If we have a pixbuf and we need an image
 302         if ( pixbuf && width > 0 && this->image == NULL )
 303         {
 304                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 305                 int interp = GDK_INTERP_BILINEAR;
 306
 307                 if ( strcmp( interps, "nearest" ) == 0 )
 308                         interp = GDK_INTERP_NEAREST;
 309                 else if ( strcmp( interps, "tiles" ) == 0 )
 310                         interp = GDK_INTERP_TILES;
 311                 else if ( strcmp( interps, "hyper" ) == 0 )
 312                         interp = GDK_INTERP_HYPER;
 313
 314                 // Note - the original pixbuf is already safe and ready for destruction
 315                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 316
 317                 // Store width and height
 318                 this->width = width;
 319                 this->height = height;
 320
 321                 // Allocate/define image
 322                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 323                 if ( !use_cache )
 324                         mlt_cache_item_close( this->image_cache );
 325                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image", this->image, width * ( height + 1 ) * 2, mlt_pool_release );
 326                 this->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 327
 328                 // Extract YUV422 and alpha
 329                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 330                 {
 331                         // Allocate the alpha mask
 332                         this->alpha = mlt_pool_alloc( this->width * this->height );
 333                         if ( !use_cache )
 334                                 mlt_cache_item_close( this->alpha_cache );
 335                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha", this->alpha, width * height, mlt_pool_release );
 336                         this->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha" );
 337
 338                         // Convert the image
 339                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 340                                                                                   this->width, this->height,
 341                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 342                                                                                   this->image, this->alpha );
 343                 }
 344                 else
 345                 {
 346                         // No alpha to extract
 347                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 348                                                                                  this->width, this->height,
 349                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 350                                                                                  this->image );
 351                 }
 352
 353                 // Finished with pixbuf now
 354                 g_object_unref( pixbuf );
 355
 356                 // Ensure we update the cache when we need to
 357                 update_cache = use_cache;
 358         }
 359
 360         // release references no longer needed
 361         mlt_cache_item_close( pixbuf_cache );
 362         if ( width == 0 )
 363         {
 364                 pthread_mutex_unlock( &this->mutex );
 365                 mlt_cache_item_close( this->image_cache );
 366                 mlt_cache_item_close( this->alpha_cache );
 367         }
 368
 369         // Set width/height of frame
 370         mlt_properties_set_int( properties, "width", this->width );
 371         mlt_properties_set_int( properties, "height", this->height );
 372         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 373         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 374
 375         if ( update_cache )
 376         {
 377                 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 378                 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 379                 mlt_properties_set_int( cached_props, "width", this->width );
 380                 mlt_properties_set_int( cached_props, "height", this->height );
 381                 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 382                 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 383                 mlt_properties_set_data( cached_props, "image", this->image, this->width * ( this->height + 1 ) * 2, mlt_pool_release, NULL );
 384                 mlt_properties_set_data( cached_props, "alpha", this->alpha, this->width * this->height, mlt_pool_release, NULL );
 385                 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
 386         }
 387
 388         pthread_mutex_unlock( &g_mutex );
 389 }
 390
 391 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 392 {
 393         // Obtain properties of frame
 394         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 395
 396         // Obtain the producer for this frame
 397         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 398
 399         *width = mlt_properties_get_int( properties, "rescale_width" );
 400         *height = mlt_properties_get_int( properties, "rescale_height" );
 401
 402         // Refresh the image
 403         refresh_image( this, frame, *width, *height );
 404
 405         // Get the image size
 406         int image_size = this->width * ( this->height + 1 ) * 2;
 407         int alpha_size = this->width * this->height;
 408
 409         // Get width and height (may have changed during the refresh)
 410         *width = mlt_properties_get_int( properties, "width" );
 411         *height = mlt_properties_get_int( properties, "height" );
 412
 413         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 414         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 415         if ( this->image )
 416         {
 417                 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 418                 {
 419                         // Clone the image and the alpha
 420                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 421                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 422
 423                         memcpy( image_copy, this->image, image_size );
 424
 425                         // Copy or default the alpha
 426                         if ( this->alpha != NULL )
 427                                 memcpy( alpha_copy, this->alpha, alpha_size );
 428                         else
 429                                 memset( alpha_copy, 255, alpha_size );
 430
 431                         // Now update properties so we free the copy after
 432                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 433                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 434
 435                         // We're going to pass the copy on
 436                         *buffer = image_copy;
 437                 }
 438                 else if ( *format == mlt_image_rgb24a )
 439                 {
 440                         // Clone the image and the alpha
 441                         image_size = *width * ( *height + 1 ) * 4;
 442                         alpha_size = *width * ( *height + 1 );
 443                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 444                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 445
 446                         mlt_convert_yuv422_to_rgb24a( this->image, image_copy, (*width)*(*height) );
 447
 448                         // Now update properties so we free the copy after
 449                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 450                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 451
 452                         // We're going to pass the copy on
 453                         *buffer = image_copy;
 454                 }
 455
 456         }
 457         else
 458         {
 459                 // TODO: Review all cases of invalid images
 460                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 461                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 462                 *width = 50;
 463                 *height = 50;
 464         }
 465
 466         // Release references and locks
 467         pthread_mutex_unlock( &this->mutex );
 468         mlt_cache_item_close( this->image_cache );
 469         mlt_cache_item_close( this->alpha_cache );
 470
 471         return 0;
 472 }
 473
 474 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 475 {
 476         // Obtain properties of frame
 477         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 478
 479         // Return the alpha mask
 480         return mlt_properties_get_data( properties, "alpha", NULL );
 481 }
 482
 483 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 484 {
 485         // Get the real structure for this producer
 486         producer_pixbuf this = producer->child;
 487
 488         // Fetch the producers properties
 489         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 490
 491         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 492                 load_filenames( this, producer_properties );
 493
 494         // Generate a frame
 495         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 496
 497         if ( *frame != NULL && this->count > 0 )
 498         {
 499                 // Obtain properties of frame and producer
 500                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 501
 502                 // Set the producer on the frame properties
 503                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 504
 505                 // Update timecode on the frame we're creating
 506                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 507
 508                 // Ensure that we have a way to obtain the position in the get_image
 509                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 510
 511                 // Refresh the image
 512                 refresh_image( this, *frame, 0, 0 );
 513
 514                 // Set producer-specific frame properties
 515                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 516                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 517
 518                 // Set alpha call back
 519                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 520
 521                 // Push the get_image method
 522                 mlt_frame_push_get_image( *frame, producer_get_image );
 523         }
 524
 525         // Calculate the next timecode
 526         mlt_producer_prepare_next( producer );
 527
 528         return 0;
 529 }
 530
 531 static void producer_close( mlt_producer parent )
 532 {
 533         producer_pixbuf this = parent->child;
 534         pthread_mutex_destroy( &this->mutex );
 535         parent->close = NULL;
 536         mlt_producer_close( parent );
 537         mlt_properties_close( this->filenames );
 538         free( this );
 539 }