git.sesse.net Git - mlt/blob - src/modules/gtk2/producer_pixbuf.c

   1 /*
   2  * producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_producer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_cache.h>
  24 #include <framework/mlt_log.h>
  25 #include <gdk-pixbuf/gdk-pixbuf.h>
  26
  27 #include "config.h"
  28
  29 #ifdef USE_EXIF
  30 #include <exif-data.h>
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <pthread.h>
  37 #include <math.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <unistd.h>
  41 #include <dirent.h>
  42
  43 static pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;
  44
  45 typedef struct producer_pixbuf_s *producer_pixbuf;
  46
  47 struct producer_pixbuf_s
  48 {
  49         struct mlt_producer_s parent;
  50
  51         // File name list
  52         mlt_properties filenames;
  53         int count;
  54         int image_idx;
  55         int pixbuf_idx;
  56         int width;
  57         int height;
  58         int alpha;
  59         uint8_t *image;
  60         mlt_cache_item image_cache;
  61         pthread_mutex_t mutex;
  62 };
  63
  64 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties );
  65 static void refresh_image( producer_pixbuf this, mlt_frame frame, int width, int height );
  66 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  67 static void producer_close( mlt_producer parent );
  68
  69 mlt_producer producer_pixbuf_init( char *filename )
  70 {
  71         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  72         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  73         {
  74                 mlt_producer producer = &this->parent;
  75
  76                 // Get the properties interface
  77                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
  78
  79                 // Callback registration
  80                 producer->get_frame = producer_get_frame;
  81                 producer->close = ( mlt_destructor )producer_close;
  82
  83                 // Set the default properties
  84                 mlt_properties_set( properties, "resource", filename );
  85                 mlt_properties_set_int( properties, "ttl", 25 );
  86                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  87                 mlt_properties_set_int( properties, "progressive", 1 );
  88
  89                 // Validate the resource
  90                 if ( filename )
  91                         load_filenames( this, properties );
  92                 if ( this->count )
  93                 {
  94                         mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  95                         if ( frame )
  96                         {
  97                                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
  98                                 pthread_mutex_init( &this->mutex, NULL );
  99                                 mlt_properties_set_data( frame_properties, "producer_pixbuf", this, 0, NULL, NULL );
 100                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 101                                 mlt_properties_set_position( frame_properties, "pixbuf_position", mlt_producer_position( producer ) );
 102                                 refresh_image( this, frame, 0, 0 );
 103                                 mlt_frame_close( frame );
 104                         }
 105                 }
 106                 if ( this->width == 0 )
 107                 {
 108                         producer_close( producer );
 109                         producer = NULL;
 110                 }
 111                 return producer;
 112         }
 113         free( this );
 114         return NULL;
 115 }
 116
 117 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties )
 118 {
 119         char *filename = mlt_properties_get( producer_properties, "resource" );
 120         this->filenames = mlt_properties_new( );
 121
 122         // Read xml string
 123         if ( strstr( filename, "<svg" ) )
 124         {
 125                 // Generate a temporary file for the svg
 126                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 127                 int fd = mkstemp( fullname );
 128
 129                 if ( fd > -1 )
 130                 {
 131                         // Write the svg into the temp file
 132                         ssize_t remaining_bytes;
 133                         char *xml = filename;
 134
 135                         // Strip leading crap
 136                         while ( xml[0] != '<' )
 137                                 xml++;
 138
 139                         remaining_bytes = strlen( xml );
 140                         while ( remaining_bytes > 0 )
 141                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 142                         close( fd );
 143
 144                         mlt_properties_set( this->filenames, "0", fullname );
 145
 146                         // Teehe - when the producer closes, delete the temp file and the space allo
 147                         mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 148                 }
 149         }
 150         // Obtain filenames
 151         else if ( strchr( filename, '%' ) != NULL )
 152         {
 153                 // handle picture sequences
 154                 int i = mlt_properties_get_int( producer_properties, "begin" );
 155                 int gap = 0;
 156                 char full[1024];
 157                 int keyvalue = 0;
 158                 char key[ 50 ];
 159
 160                 while ( gap < 100 )
 161                 {
 162                         struct stat buf;
 163                         snprintf( full, 1023, filename, i ++ );
 164                         if ( stat( full, &buf ) == 0 )
 165                         {
 166                                 sprintf( key, "%d", keyvalue ++ );
 167                                 mlt_properties_set( this->filenames, key, full );
 168                                 gap = 0;
 169                         }
 170                         else
 171                         {
 172                                 gap ++;
 173                         }
 174                 }
 175                 if ( mlt_properties_count( this->filenames ) > 0 )
 176                         mlt_properties_set_int( producer_properties, "ttl", 1 );
 177         }
 178         else if ( strstr( filename, "/.all." ) != NULL )
 179         {
 180                 char wildcard[ 1024 ];
 181                 char *dir_name = strdup( filename );
 182                 char *extension = strrchr( dir_name, '.' );
 183
 184                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 185                 sprintf( wildcard, "*%s", extension );
 186
 187                 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 188
 189                 free( dir_name );
 190         }
 191         else
 192         {
 193                 mlt_properties_set( this->filenames, "0", filename );
 194         }
 195
 196         this->count = mlt_properties_count( this->filenames );
 197 }
 198
 199 static void refresh_image( producer_pixbuf this, mlt_frame frame, int width, int height )
 200 {
 201         // Obtain properties of frame
 202         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 203
 204         // Obtain the producer
 205         mlt_producer producer = &this->parent;
 206
 207         // Obtain properties of producer
 208         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 209
 210         // Obtain the cache flag and structure
 211         int use_cache = mlt_properties_get_int( producer_props, "cache" );
 212         mlt_properties cache = mlt_properties_get_data( producer_props, "_cache", NULL );
 213         int update_cache = 0;
 214
 215         // restore GdkPixbuf
 216         pthread_mutex_lock( &this->mutex );
 217         mlt_cache_item pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 218         GdkPixbuf *pixbuf = mlt_cache_item_data( pixbuf_cache, NULL );
 219         GError *error = NULL;
 220
 221         // restore scaled image
 222         this->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 223         this->image = mlt_cache_item_data( this->image_cache, NULL );
 224
 225         // Check if user wants us to reload the image
 226         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 227         {
 228                 pixbuf = NULL;
 229                 this->image = NULL;
 230                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 231         }
 232
 233         // Get the time to live for each frame
 234         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 235
 236         // Get the original position of this frame
 237         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 238         position += mlt_producer_get_in( producer );
 239
 240         // Image index
 241         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 242
 243         // Key for the cache
 244         char image_key[ 10 ];
 245         sprintf( image_key, "%d", image_idx );
 246
 247         pthread_mutex_lock( &g_mutex );
 248
 249         // Check if the frame is already loaded
 250         if ( use_cache )
 251         {
 252                 if ( cache == NULL )
 253                 {
 254                         cache = mlt_properties_new( );
 255                         mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
 256                 }
 257
 258                 mlt_frame cached = mlt_properties_get_data( cache, image_key, NULL );
 259
 260                 if ( cached )
 261                 {
 262                         this->image_idx = image_idx;
 263                         mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 264                         this->width = mlt_properties_get_int( cached_props, "width" );
 265                         this->height = mlt_properties_get_int( cached_props, "height" );
 266                         mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
 267                         mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
 268                         this->image = mlt_properties_get_data( cached_props, "image", NULL );
 269                         this->alpha = mlt_properties_get_int( cached_props, "alpha" );
 270
 271                         if ( width != 0 && ( width != this->width || height != this->height ) )
 272                                 this->image = NULL;
 273                 }
 274         }
 275         int disable_exif = mlt_properties_get_int( producer_props, "disable_exif" );
 276
 277     // optimization for subsequent iterations on single picture
 278         if ( width != 0 && ( image_idx != this->image_idx || width != this->width || height != this->height ) )
 279                 this->image = NULL;
 280         if ( image_idx != this->pixbuf_idx )
 281                 pixbuf = NULL;
 282         mlt_log_debug( MLT_PRODUCER_SERVICE( producer ), "image %p pixbuf %p idx %d image_idx %d pixbuf_idx %d width %d\n",
 283                 this->image, pixbuf, image_idx, this->image_idx, this->pixbuf_idx, width );
 284         if ( ( !pixbuf && !this->image ) || mlt_properties_get_int( producer_props, "_disable_exif" ) != disable_exif )
 285         {
 286                 this->image = NULL;
 287                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
 288
 289                 if ( pixbuf )
 290                 {
 291 #ifdef USE_EXIF
 292                         // Read the exif value for this file
 293                         if ( disable_exif == 0) {
 294                                 ExifData *d = exif_data_new_from_file( mlt_properties_get_value( this->filenames, image_idx ) );
 295                                 ExifEntry *entry;
 296                                 int exif_orientation = 0;
 297
 298                                 /* get orientation and rotate image accordingly if necessary */
 299                                 if (d) {
 300                                         if ( ( entry = exif_content_get_entry ( d->ifd[EXIF_IFD_0], EXIF_TAG_ORIENTATION ) ) )
 301                                                 exif_orientation = exif_get_short (entry->data, exif_data_get_byte_order (d));
 302
 303                                         /* Free the EXIF data */
 304                                         exif_data_unref(d);
 305                                 }
 306
 307                                 if ( exif_orientation > 1 )
 308                                 {
 309                                         GdkPixbuf *processed;
 310                                         GdkPixbufRotation matrix = GDK_PIXBUF_ROTATE_NONE;
 311
 312                                         // Rotate image according to exif data
 313                                         switch ( exif_orientation ) {
 314                                           case 2:
 315                                               processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 316                                               break;
 317                                           case 3:
 318                                               matrix = GDK_PIXBUF_ROTATE_UPSIDEDOWN;
 319                                               processed = pixbuf;
 320                                               break;
 321                                           case 4:
 322                                               processed = gdk_pixbuf_flip ( pixbuf, FALSE );
 323                                               break;
 324                                           case 5:
 325                                               matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 326                                               processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 327                                               break;
 328                                           case 6:
 329                                               matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 330                                               processed = pixbuf;
 331                                               break;
 332                                           case 7:
 333                                               matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 334                                               processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 335                                               break;
 336                                           case 8:
 337                                               matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 338                                               processed = pixbuf;
 339                                               break;
 340                                         }
 341                                         pixbuf = gdk_pixbuf_rotate_simple( processed, matrix );
 342                                 }
 343                         }
 344 #endif
 345
 346                         // Register this pixbuf for destruction and reuse
 347                         mlt_cache_item_close( pixbuf_cache );
 348                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref );
 349                         pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 350                         this->pixbuf_idx = image_idx;
 351
 352                         mlt_events_block( producer_props, NULL );
 353                         mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
 354                         mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
 355                         mlt_properties_set_int( producer_props, "_disable_exif", disable_exif );
 356                         mlt_events_unblock( producer_props, NULL );
 357
 358                         // Store the width/height of the pixbuf temporarily
 359                         this->width = gdk_pixbuf_get_width( pixbuf );
 360                         this->height = gdk_pixbuf_get_height( pixbuf );
 361                 }
 362         }
 363
 364         // If we have a pixbuf and we need an image
 365         if ( pixbuf && width > 0 && !this->image )
 366         {
 367                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 368                 int interp = GDK_INTERP_BILINEAR;
 369
 370                 if ( strcmp( interps, "nearest" ) == 0 )
 371                         interp = GDK_INTERP_NEAREST;
 372                 else if ( strcmp( interps, "tiles" ) == 0 )
 373                         interp = GDK_INTERP_TILES;
 374                 else if ( strcmp( interps, "hyper" ) == 0 )
 375                         interp = GDK_INTERP_HYPER;
 376
 377                 // Note - the original pixbuf is already safe and ready for destruction
 378                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 379
 380                 // Store width and height
 381                 this->width = width;
 382                 this->height = height;
 383
 384                 // Allocate/define image
 385                 this->alpha = gdk_pixbuf_get_has_alpha( pixbuf );
 386                 int src_stride = gdk_pixbuf_get_rowstride( pixbuf );
 387                 int dst_stride = this->width * ( this->alpha ? 4 : 3 );
 388                 int image_size = dst_stride * ( height + 1 );
 389                 this->image = mlt_pool_alloc( image_size );
 390
 391                 if ( src_stride != dst_stride )
 392                 {
 393                         int y = this->height;
 394                         uint8_t *src = gdk_pixbuf_get_pixels( pixbuf );
 395                         uint8_t *dst = this->image;
 396                         while ( y-- )
 397                         {
 398                                 memcpy( dst, src, dst_stride );
 399                                 dst += dst_stride;
 400                                 src += src_stride;
 401                         }
 402                 }
 403                 else
 404                 {
 405                         memcpy( this->image, gdk_pixbuf_get_pixels( pixbuf ), src_stride * height );
 406                 }
 407                 if ( !use_cache )
 408                         mlt_cache_item_close( this->image_cache );
 409                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image", this->image, image_size, mlt_pool_release );
 410                 this->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 411                 this->image_idx = image_idx;
 412
 413                 // Finished with pixbuf now
 414                 g_object_unref( pixbuf );
 415
 416                 // Ensure we update the cache when we need to
 417                 update_cache = use_cache;
 418         }
 419
 420         // release references no longer needed
 421         mlt_cache_item_close( pixbuf_cache );
 422         if ( width == 0 )
 423         {
 424                 pthread_mutex_unlock( &this->mutex );
 425                 mlt_cache_item_close( this->image_cache );
 426         }
 427
 428         // Set width/height of frame
 429         mlt_properties_set_int( properties, "width", this->width );
 430         mlt_properties_set_int( properties, "height", this->height );
 431         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 432         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 433
 434         if ( update_cache )
 435         {
 436                 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 437                 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
 438                 mlt_properties_set_int( cached_props, "width", this->width );
 439                 mlt_properties_set_int( cached_props, "height", this->height );
 440                 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 441                 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 442                 mlt_properties_set_data( cached_props, "image", this->image, this->width * ( this->alpha ? 4 : 3 ) * this->height, mlt_pool_release, NULL );
 443                 mlt_properties_set_int( cached_props, "alpha", this->alpha );
 444                 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
 445         }
 446
 447         pthread_mutex_unlock( &g_mutex );
 448 }
 449
 450 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 451 {
 452         int error = 0;
 453
 454         // Obtain properties of frame
 455         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 456
 457         // Obtain the producer for this frame
 458         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 459
 460         *width = mlt_properties_get_int( properties, "rescale_width" );
 461         *height = mlt_properties_get_int( properties, "rescale_height" );
 462
 463         // Refresh the image
 464         refresh_image( this, frame, *width, *height );
 465
 466         // Get width and height (may have changed during the refresh)
 467         *width = this->width;
 468         *height = this->height;
 469
 470         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 471         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 472         if ( this->image )
 473         {
 474                 // Clone the image
 475                 int image_size = this->width * this->height * ( this->alpha ? 4 :3 );
 476                 uint8_t *image_copy = mlt_pool_alloc( image_size );
 477                 memcpy( image_copy, this->image, image_size );
 478                 // Now update properties so we free the copy after
 479                 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 480                 // We're going to pass the copy on
 481                 *buffer = image_copy;
 482                 *format = this->alpha ? mlt_image_rgb24a : mlt_image_rgb24;
 483                 mlt_log_debug( MLT_PRODUCER_SERVICE( &this->parent ), "%dx%d (%s)\n",
 484                         this->width, this->height, mlt_image_format_name( *format ) );
 485         }
 486         else
 487         {
 488                 error = 1;
 489         }
 490
 491         // Release references and locks
 492         pthread_mutex_unlock( &this->mutex );
 493         mlt_cache_item_close( this->image_cache );
 494
 495         return error;
 496 }
 497
 498 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 499 {
 500         // Get the real structure for this producer
 501         producer_pixbuf this = producer->child;
 502
 503         // Fetch the producers properties
 504         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 505
 506         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 507                 load_filenames( this, producer_properties );
 508
 509         // Generate a frame
 510         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 511
 512         if ( *frame != NULL && this->count > 0 )
 513         {
 514                 // Obtain properties of frame and producer
 515                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 516
 517                 // Set the producer on the frame properties
 518                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 519
 520                 // Update timecode on the frame we're creating
 521                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 522
 523                 // Ensure that we have a way to obtain the position in the get_image
 524                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 525
 526                 // Refresh the image
 527                 refresh_image( this, *frame, 0, 0 );
 528
 529                 // Set producer-specific frame properties
 530                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 531                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 532
 533                 // Push the get_image method
 534                 mlt_frame_push_get_image( *frame, producer_get_image );
 535         }
 536
 537         // Calculate the next timecode
 538         mlt_producer_prepare_next( producer );
 539
 540         return 0;
 541 }
 542
 543 static void producer_close( mlt_producer parent )
 544 {
 545         producer_pixbuf this = parent->child;
 546         pthread_mutex_destroy( &this->mutex );
 547         parent->close = NULL;
 548         mlt_service_cache_purge( MLT_PRODUCER_SERVICE(parent) );
 549         mlt_producer_close( parent );
 550         mlt_properties_close( this->filenames );
 551         free( this );
 552 }