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