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 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  35 static void producer_close( mlt_producer parent );
  36
  37 static int filter_files( const struct dirent *de )
  38 {
  39         if ( de->d_name[ 0 ] != '.' )
  40                 return 1;
  41         else
  42                 return 0;
  43 }
  44
  45 mlt_producer producer_pixbuf_init( char *filename )
  46 {
  47         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  48         if ( filename != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  49         {
  50                 mlt_producer producer = &this->parent;
  51
  52                 // Get the properties interface
  53                 mlt_properties properties = mlt_producer_properties( &this->parent );
  54
  55                 // Callback registration
  56                 producer->get_frame = producer_get_frame;
  57                 producer->close = producer_close;
  58
  59                 // Set the default properties
  60                 mlt_properties_set( properties, "resource", filename );
  61                 mlt_properties_set_int( properties, "ttl", 25 );
  62
  63                 // Obtain filenames
  64                 if ( strchr( filename, '%' ) != NULL )
  65                 {
  66                         // handle picture sequences
  67                         int i = 0;
  68                         int gap = 0;
  69                         char full[1024];
  70
  71                         while ( gap < 100 )
  72                         {
  73                                 struct stat buf;
  74                                 snprintf( full, 1023, filename, i ++ );
  75                                 if ( stat( full, &buf ) == 0 )
  76                                 {
  77                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
  78                                         this->filenames[ this->count ++ ] = strdup( full );
  79                                         gap = 0;
  80                                 }
  81                                 else
  82                                 {
  83                                         gap ++;
  84                                 }
  85                         }
  86                         mlt_properties_set_position( properties, "out", this->count * 250 );
  87                 }
  88                 else if ( strstr( filename, "/.all." ) != NULL )
  89                 {
  90                         char *dir_name = strdup( filename );
  91                         char *extension = strrchr( filename, '.' );
  92                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
  93                         char fullname[ 1024 ];
  94                         strcpy( fullname, dir_name );
  95                         struct dirent **de = NULL;
  96                         int n = scandir( fullname, &de, filter_files, alphasort );
  97                         int i;
  98                         struct stat info;
  99
 100                         for (i = 0; i < n; i++ )
 101                         {
 102                                 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
 103
 104                                 if ( lstat( fullname, &info ) == 0 &&
 105                                         ( S_ISREG( info.st_mode ) || ( strstr( fullname, extension ) && info.st_mode | S_IXUSR ) ) )
 106                                 {
 107                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 108                                         this->filenames[ this->count ++ ] = strdup( fullname );
 109                                 }
 110                                 free( de[ i ] );
 111                         }
 112
 113                         free( de );
 114                         free( dir_name );
 115                 }
 116                 else
 117                 {
 118                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 119                         this->filenames[ this->count ++ ] = strdup( filename );
 120                         mlt_properties_set_position( properties, "out", 250 );
 121                 }
 122
 123                 // Initialise gobject types
 124                 g_type_init();
 125
 126                 return producer;
 127         }
 128         free( this );
 129         return NULL;
 130 }
 131
 132 static void refresh_image( mlt_frame frame, int width, int height )
 133 {
 134         // Pixbuf
 135         GdkPixbuf *pixbuf = NULL;
 136         GError *error = NULL;
 137
 138         // Obtain properties of frame
 139         mlt_properties properties = mlt_frame_properties( frame );
 140
 141         // Obtain the producer for this frame
 142         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 143
 144         // Obtain the producer
 145         mlt_producer producer = &this->parent;
 146
 147         // Obtain properties of producer
 148         mlt_properties producer_props = mlt_producer_properties( producer );
 149
 150         // Get the time to live for each frame
 151         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 152
 153         // Image index
 154         int image_idx = ( int )floor( mlt_producer_position( producer ) / ttl ) % this->count;
 155
 156         // Update timecode on the frame we're creating
 157         mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 158
 159     // optimization for subsequent iterations on single picture
 160         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 161         {
 162                 if ( width != this->width || height != this->height )
 163                 {
 164                         pixbuf = mlt_properties_get_data( producer_props, "pixbuf", NULL );
 165                         free( this->image );
 166                         free( this->alpha );
 167                         this->image = NULL;
 168                         this->alpha = NULL;
 169                 }
 170         }
 171         else if ( this->image == NULL || image_idx != this->image_idx )
 172         {
 173                 free( this->image );
 174                 free( this->alpha );
 175                 this->image = NULL;
 176                 this->alpha = NULL;
 177
 178                 this->image_idx = image_idx;
 179                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 180
 181                 if ( pixbuf != NULL )
 182                 {
 183                         // Register this pixbuf for destruction and reuse
 184                         mlt_properties_set_data( producer_props, "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 185
 186                         mlt_properties_set_int( producer_props, "real_width", gdk_pixbuf_get_width( pixbuf ) );
 187                         mlt_properties_set_int( producer_props, "real_height", gdk_pixbuf_get_height( pixbuf ) );
 188
 189                         // Store the width/height of the pixbuf temporarily
 190                         this->width = gdk_pixbuf_get_width( pixbuf );
 191                         this->height = gdk_pixbuf_get_height( pixbuf );
 192                 }
 193         }
 194
 195         // If we have a pixbuf
 196         if ( pixbuf && width > 0 )
 197         {
 198                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 199                 int interp = GDK_INTERP_BILINEAR;
 200
 201                 if ( strcmp( interps, "nearest" ) == 0 )
 202                         interp = GDK_INTERP_NEAREST;
 203                 else if ( strcmp( interps, "tiles" ) == 0 )
 204                         interp = GDK_INTERP_TILES;
 205                 else if ( strcmp( interps, "hyper" ) == 0 )
 206                         interp = GDK_INTERP_HYPER;
 207
 208 //              fprintf( stderr, "SCALING PIXBUF from %dx%d to %dx%d was %dx%d\n", gdk_pixbuf_get_width( pixbuf ), gdk_pixbuf_get_height( pixbuf ), width, height, this->width, this->height );
 209
 210                 // Note - the original pixbuf is already safe and ready for destruction
 211                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 212
 213                 // Store width and height
 214                 this->width = width;
 215                 this->height = height;
 216
 217                 // Allocate/define image
 218                 // IRRIGATE ME
 219                 uint8_t *image = malloc( width * ( height + 1 ) * 2 );
 220                 uint8_t *alpha = NULL;
 221
 222                 // Extract YUV422 and alpha
 223                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 224                 {
 225                         // Allocate the alpha mask
 226                         alpha = malloc( this->width * this->height );
 227
 228                         // Convert the image
 229                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 230                                                                                   this->width, this->height,
 231                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 232                                                                                   image, alpha );
 233                 }
 234                 else
 235                 {
 236                         // No alpha to extract
 237                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 238                                                                                  this->width, this->height,
 239                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 240                                                                                  image );
 241                 }
 242
 243                 // Finished with pixbuf now
 244                 g_object_unref( pixbuf );
 245
 246                 // Assign images to producer
 247                 this->image = image;
 248                 this->alpha = alpha;
 249         }
 250
 251         // Set width/height of frame
 252         mlt_properties_set_int( properties, "width", this->width );
 253         mlt_properties_set_int( properties, "height", this->height );
 254         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
 255         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
 256
 257         // pass the image data without destructor
 258         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 259         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 260 }
 261
 262 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 263 {
 264         // Obtain properties of frame
 265         mlt_properties properties = mlt_frame_properties( frame );
 266
 267         *width = mlt_properties_get_int( properties, "rescale_width" );
 268         *height = mlt_properties_get_int( properties, "rescale_height" );
 269
 270         // Refresh the image
 271         refresh_image( frame, *width, *height );
 272
 273         // Determine format
 274         //mlt_producer this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 275         //*format = ( mlt_properties_get_int( mlt_producer_properties( this ), "bpp" ) == 4 ) ? mlt_image_rgb24a : mlt_image_rgb24;
 276
 277         // May need to know the size of the image to clone it
 278         int size = 0;
 279
 280         // Get the image
 281         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 282
 283         // Get width and height
 284         *width = mlt_properties_get_int( properties, "width" );
 285         *height = mlt_properties_get_int( properties, "height" );
 286
 287         // Clone if necessary
 288         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 289         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 290         //if ( writable )
 291         {
 292                 // Clone our image
 293                 // IRRIGATE ME
 294                 uint8_t *copy = malloc( size );
 295                 memcpy( copy, image, size );
 296
 297                 // We're going to pass the copy on
 298                 image = copy;
 299
 300                 // Now update properties so we free the copy after
 301                 mlt_properties_set_data( properties, "image", copy, size, free, NULL );
 302         }
 303
 304         // Pass on the image
 305         *buffer = image;
 306
 307         return 0;
 308 }
 309
 310 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 311 {
 312         // Obtain properties of frame
 313         mlt_properties properties = mlt_frame_properties( this );
 314
 315         // Return the alpha mask
 316         return mlt_properties_get_data( properties, "alpha", NULL );
 317 }
 318
 319 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 320 {
 321         // Get the real structure for this producer
 322         producer_pixbuf this = producer->child;
 323
 324         // Generate a frame
 325         *frame = mlt_frame_init( );
 326
 327         // Obtain properties of frame and producer
 328         mlt_properties properties = mlt_frame_properties( *frame );
 329
 330         // Set the producer on the frame properties
 331         mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 332
 333         // Refresh the image
 334         refresh_image( *frame, 0, 0 );
 335
 336         // Set producer-specific frame properties
 337         mlt_properties_set_int( properties, "progressive", 1 );
 338         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( properties, "real_width" ) / mlt_properties_get_double( properties, "real_height" ) );
 339
 340         // Set alpha call back
 341         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 342
 343         // Push the get_image method
 344         mlt_frame_push_get_image( *frame, producer_get_image );
 345
 346         // Calculate the next timecode
 347         mlt_producer_prepare_next( producer );
 348
 349         return 0;
 350 }
 351
 352 static void producer_close( mlt_producer parent )
 353 {
 354         producer_pixbuf this = parent->child;
 355         free( this->image );
 356         parent->close = NULL;
 357         mlt_producer_close( parent );
 358         free( this );
 359 }
 360