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                         mlt_properties_set_int( producer_props, "bpp", gdk_pixbuf_get_has_alpha( pixbuf ) ? 4 : 3 );
 166                         free( this->image );
 167                         free( this->alpha );
 168                         this->image = NULL;
 169                         this->alpha = NULL;
 170                 }
 171         }
 172         else if ( this->image == NULL || image_idx != this->image_idx )
 173         {
 174                 free( this->image );
 175                 free( this->alpha );
 176                 this->image = NULL;
 177                 this->alpha = NULL;
 178
 179                 this->image_idx = image_idx;
 180                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 181
 182                 if ( pixbuf != NULL )
 183                 {
 184                         // Register this pixbuf for destruction and reuse
 185                         mlt_properties_set_data( producer_props, "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 186
 187                         mlt_properties_set_int( producer_props, "real_width", gdk_pixbuf_get_width( pixbuf ) );
 188                         mlt_properties_set_int( producer_props, "real_height", gdk_pixbuf_get_height( pixbuf ) );
 189
 190                         // Store the width/height of the pixbuf temporarily
 191                         this->width = gdk_pixbuf_get_width( pixbuf );
 192                         this->height = gdk_pixbuf_get_height( pixbuf );
 193
 194                         mlt_properties_set_int( producer_props, "bpp", gdk_pixbuf_get_has_alpha( pixbuf ) ? 4 : 3 );
 195                 }
 196         }
 197
 198         int bpp = mlt_properties_get_int( producer_props, "bpp" );
 199
 200         // If we have a pixbuf
 201         if ( pixbuf && width > 0 )
 202         {
 203
 204                 // Note - the original pixbuf is already safe and ready for destruction
 205                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, GDK_INTERP_NEAREST );
 206
 207                 // Store width and height
 208                 this->width = width;
 209                 this->height = height;
 210
 211                 //fprintf( stderr, "SCALING PIXBUF from %dx%d to %dx%d %dx%d\n", gdk_pixbuf_get_width( pixbuf ), gdk_pixbuf_get_height( pixbuf ), width, height, this->width, this->height );
 212                 // Allocate/define image
 213                 // IRRIGATE ME
 214                 uint8_t *image = malloc( width * ( height + 1 ) * bpp );
 215                 uint8_t *alpha = NULL;
 216
 217                 // Extract YUV422 and alpha
 218                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 219                 {
 220                         // Allocate the alpha mask
 221                         alpha = malloc( this->width * this->height );
 222
 223                         // Convert the image
 224                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 225                                                                                   this->width, this->height,
 226                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 227                                                                                   image, alpha );
 228                 }
 229                 else
 230                 {
 231                         // No alpha to extract
 232                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 233                                                                                  this->width, this->height,
 234                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 235                                                                                  image );
 236                 }
 237
 238                 // Finished with pixbuf now
 239                 g_object_unref( pixbuf );
 240
 241                 // Assign images to producer
 242                 this->image = image;
 243                 this->alpha = alpha;
 244         }
 245
 246         // Set width/height of frame
 247         mlt_properties_set_int( properties, "width", this->width );
 248         mlt_properties_set_int( properties, "height", this->height );
 249         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
 250         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
 251
 252         // pass the image data without destructor
 253         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 254         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 255 }
 256
 257 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 258 {
 259         // Obtain properties of frame
 260         mlt_properties properties = mlt_frame_properties( frame );
 261
 262         *width = mlt_properties_get_int( properties, "rescale_width" );
 263         *height = mlt_properties_get_int( properties, "rescale_height" );
 264
 265         // Refresh the image
 266         refresh_image( frame, *width, *height );
 267
 268         // Determine format
 269         //mlt_producer this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 270         //*format = ( mlt_properties_get_int( mlt_producer_properties( this ), "bpp" ) == 4 ) ? mlt_image_rgb24a : mlt_image_rgb24;
 271
 272         // May need to know the size of the image to clone it
 273         int size = 0;
 274
 275         // Get the image
 276         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 277
 278         // Get width and height
 279         *width = mlt_properties_get_int( properties, "width" );
 280         *height = mlt_properties_get_int( properties, "height" );
 281
 282         // Clone if necessary
 283         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 284         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 285         //if ( writable )
 286         {
 287                 // Clone our image
 288                 // IRRIGATE ME
 289                 uint8_t *copy = malloc( size );
 290                 memcpy( copy, image, size );
 291
 292                 // We're going to pass the copy on
 293                 image = copy;
 294
 295                 // Now update properties so we free the copy after
 296                 mlt_properties_set_data( properties, "image", copy, size, free, NULL );
 297         }
 298
 299         // Pass on the image
 300         *buffer = image;
 301
 302         return 0;
 303 }
 304
 305 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 306 {
 307         // Obtain properties of frame
 308         mlt_properties properties = mlt_frame_properties( this );
 309
 310         // Return the alpha mask
 311         return mlt_properties_get_data( properties, "alpha", NULL );
 312 }
 313
 314 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 315 {
 316         // Get the real structure for this producer
 317         producer_pixbuf this = producer->child;
 318
 319         // Generate a frame
 320         *frame = mlt_frame_init( );
 321
 322         // Obtain properties of frame and producer
 323         mlt_properties properties = mlt_frame_properties( *frame );
 324
 325         // Set the producer on the frame properties
 326         mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 327
 328         // Refresh the image
 329         refresh_image( *frame, 0, 0 );
 330
 331         // Set producer-specific frame properties
 332         mlt_properties_set_int( properties, "progressive", 1 );
 333         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( properties, "real_width" ) / mlt_properties_get_double( properties, "real_height" ) );
 334
 335         // Set alpha call back
 336         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 337
 338         // Push the get_image method
 339         mlt_frame_push_get_image( *frame, producer_get_image );
 340
 341         // Calculate the next timecode
 342         mlt_producer_prepare_next( producer );
 343
 344         return 0;
 345 }
 346
 347 static void producer_close( mlt_producer parent )
 348 {
 349         producer_pixbuf this = parent->child;
 350         free( this->image );
 351         parent->close = NULL;
 352         mlt_producer_close( parent );
 353         free( this );
 354 }
 355