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 <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         void *image_release;
  48         uint8_t *image;
  49         void *alpha_release;
  50         uint8_t *alpha;
  51 };
  52
  53 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  54 static void producer_close( mlt_producer parent );
  55
  56 static int filter_files( const struct dirent *de )
  57 {
  58         if ( de->d_name[ 0 ] != '.' )
  59                 return 1;
  60         else
  61                 return 0;
  62 }
  63
  64 mlt_producer producer_pixbuf_init( char *filename )
  65 {
  66         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  67         if ( filename != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  68         {
  69                 mlt_producer producer = &this->parent;
  70
  71                 // Get the properties interface
  72                 mlt_properties properties = mlt_producer_properties( &this->parent );
  73
  74                 // Callback registration
  75                 producer->get_frame = producer_get_frame;
  76                 producer->close = producer_close;
  77
  78                 // Set the default properties
  79                 mlt_properties_set( properties, "resource", filename );
  80                 mlt_properties_set_int( properties, "ttl", 25 );
  81
  82                 // Obtain filenames
  83                 if ( strchr( filename, '%' ) != NULL )
  84                 {
  85                         // handle picture sequences
  86                         int i = 0;
  87                         int gap = 0;
  88                         char full[1024];
  89
  90                         while ( gap < 100 )
  91                         {
  92                                 struct stat buf;
  93                                 snprintf( full, 1023, filename, i ++ );
  94                                 if ( stat( full, &buf ) == 0 )
  95                                 {
  96                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
  97                                         this->filenames[ this->count ++ ] = strdup( full );
  98                                         gap = 0;
  99                                 }
 100                                 else
 101                                 {
 102                                         gap ++;
 103                                 }
 104                         }
 105                         mlt_properties_set_position( properties, "out", this->count * 250 );
 106                 }
 107                 else if ( strstr( filename, "/.all." ) != NULL )
 108                 {
 109                         char *dir_name = strdup( filename );
 110                         char *extension = strrchr( filename, '.' );
 111                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 112                         char fullname[ 1024 ];
 113                         strcpy( fullname, dir_name );
 114                         struct dirent **de = NULL;
 115                         int n = scandir( fullname, &de, filter_files, alphasort );
 116                         int i;
 117                         struct stat info;
 118
 119                         for (i = 0; i < n; i++ )
 120                         {
 121                                 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
 122
 123                                 if ( lstat( fullname, &info ) == 0 &&
 124                                         ( S_ISREG( info.st_mode ) || ( strstr( fullname, extension ) && info.st_mode | S_IXUSR ) ) )
 125                                 {
 126                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 127                                         this->filenames[ this->count ++ ] = strdup( fullname );
 128                                 }
 129                                 free( de[ i ] );
 130                         }
 131
 132                         free( de );
 133                         free( dir_name );
 134                 }
 135                 else
 136                 {
 137                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 138                         this->filenames[ this->count ++ ] = strdup( filename );
 139                         mlt_properties_set_position( properties, "out", 250 );
 140                 }
 141
 142                 // Initialise gobject types
 143                 g_type_init();
 144
 145                 return producer;
 146         }
 147         free( this );
 148         return NULL;
 149 }
 150
 151 static void refresh_image( mlt_frame frame, int width, int height )
 152 {
 153         // Pixbuf
 154         GdkPixbuf *pixbuf = NULL;
 155         GError *error = NULL;
 156
 157         // Obtain properties of frame
 158         mlt_properties properties = mlt_frame_properties( frame );
 159
 160         // Obtain the producer for this frame
 161         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 162
 163         // Obtain the producer
 164         mlt_producer producer = &this->parent;
 165
 166         // Obtain properties of producer
 167         mlt_properties producer_props = mlt_producer_properties( producer );
 168
 169         // Get the time to live for each frame
 170         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 171
 172         // Image index
 173         int image_idx = ( int )floor( mlt_producer_position( producer ) / ttl ) % this->count;
 174
 175         // Update timecode on the frame we're creating
 176         mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 177
 178     // optimization for subsequent iterations on single picture
 179         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 180         {
 181                 if ( width != this->width || height != this->height )
 182                 {
 183                         pixbuf = mlt_properties_get_data( producer_props, "pixbuf", NULL );
 184                         mlt_pool_release( this->image_release );
 185                         mlt_pool_release( this->alpha_release );
 186                         this->image_release = NULL;
 187                         this->alpha_release = NULL;
 188                         this->image = NULL;
 189                         this->alpha = NULL;
 190                 }
 191         }
 192         else if ( this->image == NULL || image_idx != this->image_idx )
 193         {
 194                 mlt_pool_release( this->image_release );
 195                 mlt_pool_release( this->alpha_release );
 196                 this->image_release = NULL;
 197                 this->alpha_release = NULL;
 198                 this->image = NULL;
 199                 this->alpha = NULL;
 200
 201                 this->image_idx = image_idx;
 202                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 203
 204                 if ( pixbuf != NULL )
 205                 {
 206                         // Register this pixbuf for destruction and reuse
 207                         mlt_properties_set_data( producer_props, "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 208
 209                         mlt_properties_set_int( producer_props, "real_width", gdk_pixbuf_get_width( pixbuf ) );
 210                         mlt_properties_set_int( producer_props, "real_height", gdk_pixbuf_get_height( pixbuf ) );
 211
 212                         // Store the width/height of the pixbuf temporarily
 213                         this->width = gdk_pixbuf_get_width( pixbuf );
 214                         this->height = gdk_pixbuf_get_height( pixbuf );
 215                 }
 216         }
 217
 218         // If we have a pixbuf
 219         if ( pixbuf && width > 0 )
 220         {
 221                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 222                 int interp = GDK_INTERP_BILINEAR;
 223
 224                 if ( strcmp( interps, "nearest" ) == 0 )
 225                         interp = GDK_INTERP_NEAREST;
 226                 else if ( strcmp( interps, "tiles" ) == 0 )
 227                         interp = GDK_INTERP_TILES;
 228                 else if ( strcmp( interps, "hyper" ) == 0 )
 229                         interp = GDK_INTERP_HYPER;
 230
 231                 // Note - the original pixbuf is already safe and ready for destruction
 232                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 233
 234                 // Store width and height
 235                 this->width = width;
 236                 this->height = height;
 237
 238                 // Allocate/define image
 239                 this->image = mlt_pool_allocate( width * ( height + 1 ) * 2, &this->image_release );
 240
 241                 // Extract YUV422 and alpha
 242                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 243                 {
 244                         // Allocate the alpha mask
 245                         this->alpha = mlt_pool_allocate( this->width * this->height, &this->alpha_release );
 246
 247                         // Convert the image
 248                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 249                                                                                   this->width, this->height,
 250                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 251                                                                                   this->image, this->alpha );
 252                 }
 253                 else
 254                 {
 255                         // No alpha to extract
 256                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 257                                                                                  this->width, this->height,
 258                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 259                                                                                  this->image );
 260                 }
 261
 262                 // Finished with pixbuf now
 263                 g_object_unref( pixbuf );
 264         }
 265
 266         // Set width/height of frame
 267         mlt_properties_set_int( properties, "width", this->width );
 268         mlt_properties_set_int( properties, "height", this->height );
 269         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
 270         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
 271
 272         // pass the image data without destructor
 273         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 274         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 275 }
 276
 277 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 278 {
 279         // Obtain properties of frame
 280         mlt_properties properties = mlt_frame_properties( frame );
 281
 282         *width = mlt_properties_get_int( properties, "rescale_width" );
 283         *height = mlt_properties_get_int( properties, "rescale_height" );
 284
 285         // Refresh the image
 286         refresh_image( frame, *width, *height );
 287
 288         // Determine format
 289         //mlt_producer this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 290         //*format = ( mlt_properties_get_int( mlt_producer_properties( this ), "bpp" ) == 4 ) ? mlt_image_rgb24a : mlt_image_rgb24;
 291
 292         // May need to know the size of the image to clone it
 293         int size = 0;
 294
 295         // Get the image
 296         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 297
 298         // Get width and height
 299         *width = mlt_properties_get_int( properties, "width" );
 300         *height = mlt_properties_get_int( properties, "height" );
 301
 302         // Clone if necessary
 303         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 304         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 305         //if ( writable )
 306         {
 307                 // Clone our image
 308                 void *release = NULL;
 309                 uint8_t *copy = mlt_pool_allocate( size, &release );
 310                 memcpy( copy, image, size );
 311
 312                 // We're going to pass the copy on
 313                 image = copy;
 314
 315                 // Now update properties so we free the copy after
 316                 mlt_properties_set_data( properties, "image_release", release, 0, mlt_pool_release, NULL );
 317                 mlt_properties_set_data( properties, "image", copy, size, NULL, NULL );
 318         }
 319
 320         // Pass on the image
 321         *buffer = image;
 322
 323         return 0;
 324 }
 325
 326 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 327 {
 328         // Obtain properties of frame
 329         mlt_properties properties = mlt_frame_properties( this );
 330
 331         // Return the alpha mask
 332         return mlt_properties_get_data( properties, "alpha", NULL );
 333 }
 334
 335 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 336 {
 337         // Get the real structure for this producer
 338         producer_pixbuf this = producer->child;
 339
 340         // Generate a frame
 341         *frame = mlt_frame_init( );
 342
 343         // Obtain properties of frame and producer
 344         mlt_properties properties = mlt_frame_properties( *frame );
 345
 346         // Set the producer on the frame properties
 347         mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 348
 349         // Refresh the image
 350         refresh_image( *frame, 0, 0 );
 351
 352         // Set producer-specific frame properties
 353         mlt_properties_set_int( properties, "progressive", 1 );
 354         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( properties, "real_width" ) / mlt_properties_get_double( properties, "real_height" ) );
 355
 356         // Set alpha call back
 357         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 358
 359         // Push the get_image method
 360         mlt_frame_push_get_image( *frame, producer_get_image );
 361
 362         // Calculate the next timecode
 363         mlt_producer_prepare_next( producer );
 364
 365         return 0;
 366 }
 367
 368 static void producer_close( mlt_producer parent )
 369 {
 370         producer_pixbuf this = parent->child;
 371         free( this->image );
 372         parent->close = NULL;
 373         mlt_producer_close( parent );
 374         free( this );
 375 }
 376