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 <libexif/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 self, mlt_properties producer_properties );
  65 static void refresh_image( producer_pixbuf self, 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 self = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  72         if ( self != NULL && mlt_producer_init( &self->parent, self ) == 0 )
  73         {
  74                 mlt_producer producer = &self->parent;
  75
  76                 // Get the properties interface
  77                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &self->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( self, properties );
  92                 if ( self->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( &self->mutex, NULL );
  99                                 mlt_properties_set_data( frame_properties, "producer_pixbuf", self, 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( self, frame, 0, 0 );
 103                                 mlt_frame_close( frame );
 104                         }
 105                 }
 106                 if ( self->width == 0 )
 107                 {
 108                         producer_close( producer );
 109                         producer = NULL;
 110                 }
 111                 return producer;
 112         }
 113         free( self );
 114         return NULL;
 115 }
 116
 117 static void load_filenames( producer_pixbuf self, mlt_properties producer_properties )
 118 {
 119         char *filename = mlt_properties_get( producer_properties, "resource" );
 120         self->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 = g_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( self->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( self->filenames, key, full );
 168                                 gap = 0;
 169                         }
 170                         else
 171                         {
 172                                 gap ++;
 173                         }
 174                 }
 175                 if ( mlt_properties_count( self->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( self->filenames, dir_name, wildcard, 1 );
 188
 189                 free( dir_name );
 190         }
 191         else
 192         {
 193                 mlt_properties_set( self->filenames, "0", filename );
 194         }
 195
 196         self->count = mlt_properties_count( self->filenames );
 197 }
 198
 199 static void refresh_image( producer_pixbuf self, 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 = &self->parent;
 206
 207         // Obtain properties of producer
 208         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 209
 210         // restore GdkPixbuf
 211         pthread_mutex_lock( &self->mutex );
 212         mlt_cache_item pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 213         GdkPixbuf *pixbuf = mlt_cache_item_data( pixbuf_cache, NULL );
 214         GError *error = NULL;
 215
 216         // restore scaled image
 217         self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 218         self->image = mlt_cache_item_data( self->image_cache, NULL );
 219
 220         // Check if user wants us to reload the image
 221         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 222         {
 223                 pixbuf = NULL;
 224                 self->image = NULL;
 225                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 226         }
 227
 228         // Get the time to live for each frame
 229         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 230
 231         // Get the original position of this frame
 232         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 233         position += mlt_producer_get_in( producer );
 234
 235         // Image index
 236         int image_idx = ( int )floor( ( double )position / ttl ) % self->count;
 237
 238         // Key for the cache
 239         char image_key[ 10 ];
 240         sprintf( image_key, "%d", image_idx );
 241
 242         pthread_mutex_lock( &g_mutex );
 243
 244         int disable_exif = mlt_properties_get_int( producer_props, "disable_exif" );
 245
 246         // optimization for subsequent iterations on single picture
 247         if ( width != 0 && ( image_idx != self->image_idx || width != self->width || height != self->height ) )
 248                 self->image = NULL;
 249         if ( image_idx != self->pixbuf_idx )
 250                 pixbuf = NULL;
 251         mlt_log_debug( MLT_PRODUCER_SERVICE( producer ), "image %p pixbuf %p idx %d image_idx %d pixbuf_idx %d width %d\n",
 252                 self->image, pixbuf, image_idx, self->image_idx, self->pixbuf_idx, width );
 253         if ( !pixbuf || mlt_properties_get_int( producer_props, "_disable_exif" ) != disable_exif )
 254         {
 255                 self->image = NULL;
 256                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( self->filenames, image_idx ), &error );
 257
 258                 if ( pixbuf )
 259                 {
 260 #ifdef USE_EXIF
 261                         // Read the exif value for this file
 262                         if ( disable_exif == 0) {
 263                                 ExifData *d = exif_data_new_from_file( mlt_properties_get_value( self->filenames, image_idx ) );
 264                                 ExifEntry *entry;
 265                                 int exif_orientation = 0;
 266
 267                                 /* get orientation and rotate image accordingly if necessary */
 268                                 if (d) {
 269                                         if ( ( entry = exif_content_get_entry ( d->ifd[EXIF_IFD_0], EXIF_TAG_ORIENTATION ) ) )
 270                                                 exif_orientation = exif_get_short (entry->data, exif_data_get_byte_order (d));
 271
 272                                         /* Free the EXIF data */
 273                                         exif_data_unref(d);
 274                                 }
 275
 276                                 // Remember EXIF value, might be useful for someone
 277                                 mlt_properties_set_int( producer_props, "_exif_orientation" , exif_orientation );
 278
 279                                 if ( exif_orientation > 1 )
 280                                 {
 281                                         GdkPixbuf *processed = NULL;
 282                                         GdkPixbufRotation matrix = GDK_PIXBUF_ROTATE_NONE;
 283
 284                                         // Rotate image according to exif data
 285                                         switch ( exif_orientation ) {
 286                                           case 2:
 287                                               processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 288                                               break;
 289                                           case 3:
 290                                               matrix = GDK_PIXBUF_ROTATE_UPSIDEDOWN;
 291                                               processed = pixbuf;
 292                                               break;
 293                                           case 4:
 294                                               processed = gdk_pixbuf_flip ( pixbuf, FALSE );
 295                                               break;
 296                                           case 5:
 297                                               matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 298                                               processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 299                                               break;
 300                                           case 6:
 301                                               matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 302                                               processed = pixbuf;
 303                                               break;
 304                                           case 7:
 305                                               matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 306                                               processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 307                                               break;
 308                                           case 8:
 309                                               matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 310                                               processed = pixbuf;
 311                                               break;
 312                                         }
 313                                         if ( processed )
 314                                                 pixbuf = gdk_pixbuf_rotate_simple( processed, matrix );
 315                                 }
 316                         }
 317 #endif
 318
 319                         // Register this pixbuf for destruction and reuse
 320                         mlt_cache_item_close( pixbuf_cache );
 321                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref );
 322                         pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 323                         self->pixbuf_idx = image_idx;
 324
 325                         mlt_events_block( producer_props, NULL );
 326                         mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
 327                         mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
 328                         mlt_properties_set_int( producer_props, "_disable_exif", disable_exif );
 329                         mlt_events_unblock( producer_props, NULL );
 330
 331                         // Store the width/height of the pixbuf temporarily
 332                         self->width = gdk_pixbuf_get_width( pixbuf );
 333                         self->height = gdk_pixbuf_get_height( pixbuf );
 334                 }
 335         }
 336
 337         // If we have a pixbuf and we need an image
 338         if ( pixbuf && width > 0 && !self->image )
 339         {
 340                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 341                 int interp = GDK_INTERP_BILINEAR;
 342
 343                 if ( strcmp( interps, "nearest" ) == 0 )
 344                         interp = GDK_INTERP_NEAREST;
 345                 else if ( strcmp( interps, "tiles" ) == 0 )
 346                         interp = GDK_INTERP_TILES;
 347                 else if ( strcmp( interps, "hyper" ) == 0 || strcmp( interps, "bicubic" ) == 0 )
 348                         interp = GDK_INTERP_HYPER;
 349
 350                 // Note - the original pixbuf is already safe and ready for destruction
 351                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 352
 353                 // Store width and height
 354                 self->width = width;
 355                 self->height = height;
 356
 357                 // Allocate/define image
 358                 self->alpha = gdk_pixbuf_get_has_alpha( pixbuf );
 359                 int src_stride = gdk_pixbuf_get_rowstride( pixbuf );
 360                 int dst_stride = self->width * ( self->alpha ? 4 : 3 );
 361                 int image_size = dst_stride * ( height + 1 );
 362                 self->image = mlt_pool_alloc( image_size );
 363
 364                 if ( src_stride != dst_stride )
 365                 {
 366                         int y = self->height;
 367                         uint8_t *src = gdk_pixbuf_get_pixels( pixbuf );
 368                         uint8_t *dst = self->image;
 369                         while ( y-- )
 370                         {
 371                                 memcpy( dst, src, dst_stride );
 372                                 dst += dst_stride;
 373                                 src += src_stride;
 374                         }
 375                 }
 376                 else
 377                 {
 378                         memcpy( self->image, gdk_pixbuf_get_pixels( pixbuf ), src_stride * height );
 379                 }
 380                 mlt_cache_item_close( self->image_cache );
 381                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image", self->image, image_size, mlt_pool_release );
 382                 self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 383                 self->image_idx = image_idx;
 384
 385                 // Finished with pixbuf now
 386                 g_object_unref( pixbuf );
 387         }
 388
 389         // release references no longer needed
 390         mlt_cache_item_close( pixbuf_cache );
 391         if ( width == 0 )
 392         {
 393                 pthread_mutex_unlock( &self->mutex );
 394                 mlt_cache_item_close( self->image_cache );
 395         }
 396
 397         // Set width/height of frame
 398         mlt_properties_set_int( properties, "width", self->width );
 399         mlt_properties_set_int( properties, "height", self->height );
 400         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 401         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 402
 403         pthread_mutex_unlock( &g_mutex );
 404 }
 405
 406 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 407 {
 408         int error = 0;
 409
 410         // Obtain properties of frame
 411         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 412
 413         // Obtain the producer for this frame
 414         producer_pixbuf self = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 415
 416         *width = mlt_properties_get_int( properties, "rescale_width" );
 417         *height = mlt_properties_get_int( properties, "rescale_height" );
 418
 419         mlt_service_lock( MLT_PRODUCER_SERVICE( &self->parent ) );
 420
 421         // Refresh the image
 422         refresh_image( self, frame, *width, *height );
 423
 424         // Get width and height (may have changed during the refresh)
 425         *width = self->width;
 426         *height = self->height;
 427         *format = self->alpha ? mlt_image_rgb24a : mlt_image_rgb24;
 428
 429         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 430         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 431         if ( self->image )
 432         {
 433                 // Clone the image
 434                 int image_size = self->width * self->height * ( self->alpha ? 4 :3 );
 435                 uint8_t *image_copy = mlt_pool_alloc( image_size );
 436                 memcpy( image_copy, self->image, image_size );
 437                 // Now update properties so we free the copy after
 438                 mlt_frame_set_image( frame, image_copy, image_size, mlt_pool_release );
 439                 // We're going to pass the copy on
 440                 *buffer = image_copy;
 441                 mlt_log_debug( MLT_PRODUCER_SERVICE( &self->parent ), "%dx%d (%s)\n",
 442                         self->width, self->height, mlt_image_format_name( *format ) );
 443         }
 444         else
 445         {
 446                 error = 1;
 447         }
 448
 449         // Release references and locks
 450         pthread_mutex_unlock( &self->mutex );
 451         mlt_cache_item_close( self->image_cache );
 452         mlt_service_unlock( MLT_PRODUCER_SERVICE( &self->parent ) );
 453
 454         return error;
 455 }
 456
 457 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 458 {
 459         // Get the real structure for this producer
 460         producer_pixbuf self = producer->child;
 461
 462         // Fetch the producers properties
 463         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 464
 465         if ( self->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 466                 load_filenames( self, producer_properties );
 467
 468         // Generate a frame
 469         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 470
 471         if ( *frame != NULL && self->count > 0 )
 472         {
 473                 // Obtain properties of frame and producer
 474                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 475
 476                 // Set the producer on the frame properties
 477                 mlt_properties_set_data( properties, "producer_pixbuf", self, 0, NULL, NULL );
 478
 479                 // Update timecode on the frame we're creating
 480                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 481
 482                 // Ensure that we have a way to obtain the position in the get_image
 483                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 484
 485                 // Refresh the image
 486                 refresh_image( self, *frame, 0, 0 );
 487
 488                 // Set producer-specific frame properties
 489                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 490
 491                 double force_ratio = mlt_properties_get_double( producer_properties, "force_aspect_ratio" );
 492                 if ( force_ratio > 0.0 )
 493                         mlt_properties_set_double( properties, "aspect_ratio", force_ratio );
 494                 else
 495                         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 496
 497                 // Push the get_image method
 498                 mlt_frame_push_get_image( *frame, producer_get_image );
 499         }
 500
 501         // Calculate the next timecode
 502         mlt_producer_prepare_next( producer );
 503
 504         return 0;
 505 }
 506
 507 static void producer_close( mlt_producer parent )
 508 {
 509         producer_pixbuf self = parent->child;
 510         pthread_mutex_destroy( &self->mutex );
 511         parent->close = NULL;
 512         mlt_service_cache_purge( MLT_PRODUCER_SERVICE(parent) );
 513         mlt_producer_close( parent );
 514         mlt_properties_close( self->filenames );
 515         free( self );
 516 }