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