research.m1stereo.tv/gitweb/ - melted/blob - src/modules/gtk2/producer_pixbuf.c

   1
   2 /*
   3  * producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
   4  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   5  * Author: Dan Dennedy <dan@dennedy.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software Foundation,
  19  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include "producer_pixbuf.h"
  23 #include <framework/mlt_frame.h>
  24 #include <gdk-pixbuf/gdk-pixbuf.h>
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <math.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34 #include <dirent.h>
  35
  36 static pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER;
  37
  38 typedef struct producer_pixbuf_s *producer_pixbuf;
  39
  40 struct producer_pixbuf_s
  41 {
  42         struct mlt_producer_s parent;
  43
  44         // File name list
  45         mlt_properties filenames;
  46         int count;
  47         int image_idx;
  48
  49         int width;
  50         int height;
  51         uint8_t *image;
  52         uint8_t *alpha;
  53 };
  54
  55 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  56 static void producer_close( mlt_producer parent );
  57
  58 mlt_producer producer_pixbuf_init( char *filename )
  59 {
  60         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  61         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  62         {
  63                 mlt_producer producer = &this->parent;
  64
  65                 // Get the properties interface
  66                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
  67
  68                 // Callback registration
  69                 producer->get_frame = producer_get_frame;
  70                 producer->close = ( mlt_destructor )producer_close;
  71
  72                 // Set the default properties
  73                 mlt_properties_set( properties, "resource", filename );
  74                 mlt_properties_set_int( properties, "ttl", 25 );
  75                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  76                 mlt_properties_set_int( properties, "progressive", 1 );
  77
  78                 return producer;
  79         }
  80         free( this );
  81         return NULL;
  82 }
  83
  84 static void refresh_image( mlt_frame frame, int width, int height )
  85 {
  86         // Pixbuf
  87         GdkPixbuf *pixbuf = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", NULL );
  88         GError *error = NULL;
  89
  90         // Obtain properties of frame
  91         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  92
  93         // Obtain the producer for this frame
  94         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
  95
  96         // Obtain the producer
  97         mlt_producer producer = &this->parent;
  98
  99         // Obtain properties of producer
 100         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 101
 102         // Get the time to live for each frame
 103         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 104
 105         // Get the original position of this frame
 106         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 107
 108         // Image index
 109         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 110
 111         pthread_mutex_lock( &fastmutex );
 112
 113     // optimization for subsequent iterations on single picture
 114         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 115         {
 116                 if ( width != this->width || height != this->height )
 117                 {
 118                         pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
 119                         mlt_pool_release( this->image );
 120                         mlt_pool_release( this->alpha );
 121                         this->image = NULL;
 122                         this->alpha = NULL;
 123                 }
 124         }
 125         else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
 126         {
 127                 mlt_pool_release( this->image );
 128                 mlt_pool_release( this->alpha );
 129                 this->image = NULL;
 130                 this->alpha = NULL;
 131
 132                 this->image_idx = image_idx;
 133                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
 134
 135                 if ( pixbuf != NULL )
 136                 {
 137                         // Register this pixbuf for destruction and reuse
 138                         mlt_events_block( producer_props, NULL );
 139                         mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 140                         g_object_ref( pixbuf );
 141                         mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "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                         mlt_events_unblock( producer_props, NULL );
 146
 147                         // Store the width/height of the pixbuf temporarily
 148                         this->width = gdk_pixbuf_get_width( pixbuf );
 149                         this->height = gdk_pixbuf_get_height( pixbuf );
 150                 }
 151         }
 152
 153         // If we have a pixbuf
 154         if ( pixbuf && width > 0 )
 155         {
 156                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 157                 int interp = GDK_INTERP_BILINEAR;
 158
 159                 if ( strcmp( interps, "nearest" ) == 0 )
 160                         interp = GDK_INTERP_NEAREST;
 161                 else if ( strcmp( interps, "tiles" ) == 0 )
 162                         interp = GDK_INTERP_TILES;
 163                 else if ( strcmp( interps, "hyper" ) == 0 )
 164                         interp = GDK_INTERP_HYPER;
 165
 166                 // Note - the original pixbuf is already safe and ready for destruction
 167                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 168
 169                 // Store width and height
 170                 this->width = width;
 171                 this->height = height;
 172
 173                 // Allocate/define image
 174                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 175
 176                 // Extract YUV422 and alpha
 177                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 178                 {
 179                         // Allocate the alpha mask
 180                         this->alpha = mlt_pool_alloc( this->width * this->height );
 181
 182                         // Convert the image
 183                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 184                                                                                   this->width, this->height,
 185                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 186                                                                                   this->image, this->alpha );
 187                 }
 188                 else
 189                 {
 190                         // No alpha to extract
 191                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 192                                                                                  this->width, this->height,
 193                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 194                                                                                  this->image );
 195                 }
 196
 197                 // Finished with pixbuf now
 198                 g_object_unref( pixbuf );
 199         }
 200
 201         // Set width/height of frame
 202         mlt_properties_set_int( properties, "width", this->width );
 203         mlt_properties_set_int( properties, "height", this->height );
 204         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 205         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 206
 207         // pass the image data without destructor
 208         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 209         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 210
 211         pthread_mutex_unlock( &fastmutex );
 212 }
 213
 214 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 215 {
 216         // Obtain properties of frame
 217         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 218
 219         // We need to know the size of the image to clone it
 220         int image_size = 0;
 221         int alpha_size = 0;
 222
 223         // Alpha channel
 224         uint8_t *alpha = NULL;
 225
 226         *width = mlt_properties_get_int( properties, "rescale_width" );
 227         *height = mlt_properties_get_int( properties, "rescale_height" );
 228
 229         // Refresh the image
 230         refresh_image( frame, *width, *height );
 231
 232         // Get the image
 233         *buffer = mlt_properties_get_data( properties, "image", &image_size );
 234         alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
 235
 236         // Get width and height (may have changed during the refresh)
 237         *width = mlt_properties_get_int( properties, "width" );
 238         *height = mlt_properties_get_int( properties, "height" );
 239
 240         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 241         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 242         if ( *buffer != NULL )
 243         {
 244                 // Clone the image and the alpha
 245                 uint8_t *image_copy = mlt_pool_alloc( image_size );
 246                 uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 247
 248                 memcpy( image_copy, *buffer, image_size );
 249
 250                 // Copy or default the alpha
 251                 if ( alpha != NULL )
 252                         memcpy( alpha_copy, alpha, alpha_size );
 253                 else
 254                         memset( alpha_copy, 255, alpha_size );
 255
 256                 // Now update properties so we free the copy after
 257                 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 258                 mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 259
 260                 // We're going to pass the copy on
 261                 *buffer = image_copy;
 262         }
 263         else
 264         {
 265                 // TODO: Review all cases of invalid images
 266                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 267                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 268                 *width = 50;
 269                 *height = 50;
 270         }
 271
 272         return 0;
 273 }
 274
 275 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 276 {
 277         // Obtain properties of frame
 278         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 279
 280         // Return the alpha mask
 281         return mlt_properties_get_data( properties, "alpha", NULL );
 282 }
 283
 284 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 285 {
 286         // Get the real structure for this producer
 287         producer_pixbuf this = producer->child;
 288
 289         // Fetch the producers properties
 290         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 291
 292         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 293         {
 294                 char *filename = mlt_properties_get( producer_properties, "resource" );
 295                 this->filenames = mlt_properties_new( );
 296
 297                 // Read xml string
 298                 if ( strstr( filename, "<svg" ) )
 299                 {
 300                         // Generate a temporary file for the svg
 301                         char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 302                         int fd = mkstemp( fullname );
 303
 304                         if ( fd > -1 )
 305                         {
 306                                 // Write the svg into the temp file
 307                                 ssize_t remaining_bytes;
 308                                 char *xml = filename;
 309
 310                                 // Strip leading crap
 311                                 while ( xml[0] != '<' )
 312                                         xml++;
 313
 314                                 remaining_bytes = strlen( xml );
 315                                 while ( remaining_bytes > 0 )
 316                                         remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 317                                 close( fd );
 318
 319                                 mlt_properties_set( this->filenames, "0", fullname );
 320
 321                                 // Teehe - when the producer closes, delete the temp file and the space allo
 322                                 mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 323                         }
 324                 }
 325                 // Obtain filenames
 326                 else if ( strchr( filename, '%' ) != NULL )
 327                 {
 328                         // handle picture sequences
 329                         int i = mlt_properties_get_int( producer_properties, "begin" );
 330                         int gap = 0;
 331                         char full[1024];
 332                         int keyvalue = 0;
 333                         char key[ 50 ];
 334
 335                         while ( gap < 100 )
 336                         {
 337                                 struct stat buf;
 338                                 snprintf( full, 1023, filename, i ++ );
 339                                 if ( stat( full, &buf ) == 0 )
 340                                 {
 341                                         sprintf( key, "%d", keyvalue ++ );
 342                                         mlt_properties_set( this->filenames, "0", full );
 343                                         gap = 0;
 344                                 }
 345                                 else
 346                                 {
 347                                         gap ++;
 348                                 }
 349                         }
 350                 }
 351                 else if ( strstr( filename, "/.all." ) != NULL )
 352                 {
 353                         char wildcard[ 1024 ];
 354                         char *dir_name = strdup( filename );
 355                         char *extension = strrchr( dir_name, '.' );
 356
 357                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 358                         sprintf( wildcard, "*%s", extension );
 359
 360                         mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 361
 362                         free( dir_name );
 363                 }
 364                 else
 365                 {
 366                         mlt_properties_set( this->filenames, "0", filename );
 367                 }
 368
 369                 this->count = mlt_properties_count( this->filenames );
 370         }
 371
 372         // Generate a frame
 373         *frame = mlt_frame_init( );
 374
 375         if ( *frame != NULL && this->count > 0 )
 376         {
 377                 // Obtain properties of frame and producer
 378                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 379
 380                 // Set the producer on the frame properties
 381                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 382
 383                 // Update timecode on the frame we're creating
 384                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 385
 386                 // Ensure that we have a way to obtain the position in the get_image
 387                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 388
 389                 // Refresh the image
 390                 refresh_image( *frame, 0, 0 );
 391
 392                 // Set producer-specific frame properties
 393                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 394                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 395
 396                 // Set alpha call back
 397                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 398
 399                 // Push the get_image method
 400                 mlt_frame_push_get_image( *frame, producer_get_image );
 401         }
 402
 403         // Calculate the next timecode
 404         mlt_producer_prepare_next( producer );
 405
 406         return 0;
 407 }
 408
 409 static void producer_close( mlt_producer parent )
 410 {
 411         producer_pixbuf this = parent->child;
 412         mlt_pool_release( this->image );
 413         parent->close = NULL;
 414         mlt_producer_close( parent );
 415         mlt_properties_close( this->filenames );
 416         free( this );
 417 }