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 program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "producer_pixbuf.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 <math.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <unistd.h>
  32 #include <dirent.h>
  33
  34 typedef struct producer_pixbuf_s *producer_pixbuf;
  35
  36 struct producer_pixbuf_s
  37 {
  38         struct mlt_producer_s parent;
  39
  40         // File name list
  41         char **filenames;
  42         int count;
  43         int image_idx;
  44
  45         int width;
  46         int height;
  47         uint8_t *image;
  48         uint8_t *alpha;
  49 };
  50
  51 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  52 static void producer_close( mlt_producer parent );
  53
  54 static int filter_files( const struct dirent *de )
  55 {
  56         if ( de->d_name[ 0 ] != '.' )
  57                 return 1;
  58         else
  59                 return 0;
  60 }
  61
  62 mlt_producer producer_pixbuf_init( char *filename )
  63 {
  64         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  65         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  66         {
  67                 mlt_producer producer = &this->parent;
  68
  69                 // Get the properties interface
  70                 mlt_properties properties = mlt_producer_properties( &this->parent );
  71
  72                 // Callback registration
  73                 producer->get_frame = producer_get_frame;
  74                 producer->close = producer_close;
  75
  76                 // Set the default properties
  77                 mlt_properties_set( properties, "resource", filename );
  78                 mlt_properties_set_int( properties, "ttl", 25 );
  79
  80                 // Initialise gobject types
  81                 g_type_init();
  82
  83                 return producer;
  84         }
  85         free( this );
  86         return NULL;
  87 }
  88
  89 static void refresh_image( mlt_frame frame, int width, int height )
  90 {
  91         // Pixbuf
  92         GdkPixbuf *pixbuf = NULL;
  93         GError *error = NULL;
  94
  95         // Obtain properties of frame
  96         mlt_properties properties = mlt_frame_properties( frame );
  97
  98         // Obtain the producer for this frame
  99         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 100
 101         // Obtain the producer
 102         mlt_producer producer = &this->parent;
 103
 104         // Obtain properties of producer
 105         mlt_properties producer_props = mlt_producer_properties( producer );
 106
 107         // Get the time to live for each frame
 108         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 109
 110         // Get the original position of this frame
 111         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 112
 113         // Image index
 114         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 115
 116     // optimization for subsequent iterations on single picture
 117         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 118         {
 119                 if ( width != this->width || height != this->height )
 120                 {
 121                         pixbuf = mlt_properties_get_data( producer_props, "pixbuf", NULL );
 122                         mlt_pool_release( this->image );
 123                         mlt_pool_release( this->alpha );
 124                         this->image = NULL;
 125                         this->alpha = NULL;
 126                 }
 127         }
 128         else if ( this->image == NULL || image_idx != this->image_idx )
 129         {
 130                 mlt_pool_release( this->image );
 131                 mlt_pool_release( this->alpha );
 132                 this->image = NULL;
 133                 this->alpha = NULL;
 134
 135                 this->image_idx = image_idx;
 136                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 137
 138                 if ( pixbuf != NULL )
 139                 {
 140                         // Register this pixbuf for destruction and reuse
 141                         mlt_properties_set_data( producer_props, "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 142
 143                         mlt_properties_set_int( producer_props, "real_width", gdk_pixbuf_get_width( pixbuf ) );
 144                         mlt_properties_set_int( producer_props, "real_height", gdk_pixbuf_get_height( pixbuf ) );
 145
 146                         // Store the width/height of the pixbuf temporarily
 147                         this->width = gdk_pixbuf_get_width( pixbuf );
 148                         this->height = gdk_pixbuf_get_height( pixbuf );
 149                 }
 150         }
 151
 152         // If we have a pixbuf
 153         if ( pixbuf && width > 0 )
 154         {
 155                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 156                 int interp = GDK_INTERP_BILINEAR;
 157
 158                 if ( strcmp( interps, "nearest" ) == 0 )
 159                         interp = GDK_INTERP_NEAREST;
 160                 else if ( strcmp( interps, "tiles" ) == 0 )
 161                         interp = GDK_INTERP_TILES;
 162                 else if ( strcmp( interps, "hyper" ) == 0 )
 163                         interp = GDK_INTERP_HYPER;
 164
 165                 // Note - the original pixbuf is already safe and ready for destruction
 166                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 167
 168                 // Store width and height
 169                 this->width = width;
 170                 this->height = height;
 171
 172                 // Allocate/define image
 173                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 174
 175                 // Extract YUV422 and alpha
 176                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 177                 {
 178                         // Allocate the alpha mask
 179                         this->alpha = mlt_pool_alloc( this->width * this->height );
 180
 181                         // Convert the image
 182                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 183                                                                                   this->width, this->height,
 184                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 185                                                                                   this->image, this->alpha );
 186                 }
 187                 else
 188                 {
 189                         // No alpha to extract
 190                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 191                                                                                  this->width, this->height,
 192                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 193                                                                                  this->image );
 194                 }
 195
 196                 // Finished with pixbuf now
 197                 g_object_unref( pixbuf );
 198         }
 199
 200         // Set width/height of frame
 201         mlt_properties_set_int( properties, "width", this->width );
 202         mlt_properties_set_int( properties, "height", this->height );
 203         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
 204         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
 205
 206         // pass the image data without destructor
 207         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 208         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 209 }
 210
 211 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 212 {
 213         // Obtain properties of frame
 214         mlt_properties properties = mlt_frame_properties( frame );
 215
 216         *width = mlt_properties_get_int( properties, "rescale_width" );
 217         *height = mlt_properties_get_int( properties, "rescale_height" );
 218
 219         // Refresh the image
 220         refresh_image( frame, *width, *height );
 221
 222         // May need to know the size of the image to clone it
 223         int size = 0;
 224
 225         // Get the image
 226         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 227
 228         // Get width and height
 229         *width = mlt_properties_get_int( properties, "width" );
 230         *height = mlt_properties_get_int( properties, "height" );
 231
 232         // Clone if necessary
 233         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 234         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 235         //if ( writable )
 236         {
 237                 // Clone our image
 238                 uint8_t *copy = mlt_pool_alloc( size );
 239                 memcpy( copy, image, size );
 240
 241                 // We're going to pass the copy on
 242                 image = copy;
 243
 244                 // Now update properties so we free the copy after
 245                 mlt_properties_set_data( properties, "image", copy, size, mlt_pool_release, NULL );
 246         }
 247
 248         // Pass on the image
 249         *buffer = image;
 250
 251         return 0;
 252 }
 253
 254 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 255 {
 256         // Obtain properties of frame
 257         mlt_properties properties = mlt_frame_properties( this );
 258
 259         // Return the alpha mask
 260         return mlt_properties_get_data( properties, "alpha", NULL );
 261 }
 262
 263 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 264 {
 265         // Get the real structure for this producer
 266         producer_pixbuf this = producer->child;
 267
 268         if ( this->count == 0 && mlt_properties_get( mlt_producer_properties( producer ), "resource" ) != NULL )
 269         {
 270                 mlt_properties properties = mlt_producer_properties( producer );
 271                 char *filename = mlt_properties_get( properties, "resource" );
 272
 273                 // Read xml string
 274                 if ( strstr( filename, "<svg" ) )
 275                 {
 276                         // Generate a temporary file for the svg
 277                         char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 278                         int fd = mkstemp( fullname );
 279
 280                         if ( fd > -1 )
 281                         {
 282                                 // Write the svg into the temp file
 283                                 ssize_t remaining_bytes;
 284                                 char *xml = filename;
 285
 286                                 // Strip leading crap
 287                                 while ( xml[0] != '<' )
 288                                         xml++;
 289
 290                                 remaining_bytes = strlen( xml );
 291                                 while ( remaining_bytes > 0 )
 292                                         remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 293                                 close( fd );
 294
 295                                 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 296                                 this->filenames[ this->count ++ ] = strdup( fullname );
 297
 298                                 mlt_properties_set_position( properties, "out", 250 );
 299
 300                                 // Teehe - when the producer closes, delete the temp file and the space allo
 301                                 mlt_properties_set_data( properties, "__temporary_file__", this->filenames[ this->count - 1 ], 0, ( mlt_destructor )unlink, NULL );
 302                         }
 303                 }
 304                 // Obtain filenames
 305                 else if ( strchr( filename, '%' ) != NULL )
 306                 {
 307                         // handle picture sequences
 308                         int i = 0;
 309                         int gap = 0;
 310                         char full[1024];
 311
 312                         while ( gap < 100 )
 313                         {
 314                                 struct stat buf;
 315                                 snprintf( full, 1023, filename, i ++ );
 316                                 if ( stat( full, &buf ) == 0 )
 317                                 {
 318                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 319                                         this->filenames[ this->count ++ ] = strdup( full );
 320                                         gap = 0;
 321                                 }
 322                                 else
 323                                 {
 324                                         gap ++;
 325                                 }
 326                         }
 327                         mlt_properties_set_position( properties, "out", this->count * 250 );
 328                 }
 329                 else if ( strstr( filename, "/.all." ) != NULL )
 330                 {
 331                         char *dir_name = strdup( filename );
 332                         char *extension = strrchr( filename, '.' );
 333                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 334                         char fullname[ 1024 ];
 335                         strcpy( fullname, dir_name );
 336                         struct dirent **de = NULL;
 337                         int n = scandir( fullname, &de, filter_files, alphasort );
 338                         int i;
 339                         struct stat info;
 340
 341                         for (i = 0; i < n; i++ )
 342                         {
 343                                 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
 344
 345                                 if ( lstat( fullname, &info ) == 0 &&
 346                                         ( S_ISREG( info.st_mode ) || ( strstr( fullname, extension ) && info.st_mode | S_IXUSR ) ) )
 347                                 {
 348                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 349                                         this->filenames[ this->count ++ ] = strdup( fullname );
 350                                 }
 351                                 free( de[ i ] );
 352                         }
 353
 354                         free( de );
 355                         free( dir_name );
 356                 }
 357                 else
 358                 {
 359                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 360                         this->filenames[ this->count ++ ] = strdup( filename );
 361                         mlt_properties_set_position( properties, "out", 250 );
 362                 }
 363         }
 364
 365         // Generate a frame
 366         *frame = mlt_frame_init( );
 367
 368         if ( *frame != NULL && this->count > 0 )
 369         {
 370                 // Obtain properties of frame and producer
 371                 mlt_properties properties = mlt_frame_properties( *frame );
 372
 373                 // Set the producer on the frame properties
 374                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 375
 376                 // Update timecode on the frame we're creating
 377                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 378
 379                 // Ensure that we have a way to obtain the position in the get_image
 380                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 381
 382                 // Refresh the image
 383                 refresh_image( *frame, 0, 0 );
 384
 385                 // Set producer-specific frame properties
 386                 mlt_properties_set_int( properties, "progressive", 1 );
 387                 mlt_properties_set_double( properties, "aspect_ratio", 1 );
 388
 389                 // Set alpha call back
 390                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 391
 392                 // Push the get_image method
 393                 mlt_frame_push_get_image( *frame, producer_get_image );
 394         }
 395
 396         // Calculate the next timecode
 397         mlt_producer_prepare_next( producer );
 398
 399         return 0;
 400 }
 401
 402 static void producer_close( mlt_producer parent )
 403 {
 404         producer_pixbuf this = parent->child;
 405         mlt_pool_release( this->image );
 406         parent->close = NULL;
 407         mlt_producer_close( parent );
 408         while ( this->count -- )
 409                 free( this->filenames[ this->count ] );
 410         free( this->filenames );
 411         free( this );
 412 }