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