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