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 typedef enum
  38 {
  39         SIGNAL_FORMAT_PAL,
  40         SIGNAL_FORMAT_NTSC
  41 } mlt_signal_format;
  42
  43 static int filter_files( const struct dirent *de )
  44 {
  45         if ( de->d_name[ 0 ] != '.' )
  46                 return 1;
  47         else
  48                 return 0;
  49 }
  50
  51
  52 mlt_producer producer_pixbuf_init( const char *filename )
  53 {
  54         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  55         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  56         {
  57                 mlt_producer producer = &this->parent;
  58
  59                 producer->get_frame = producer_get_frame;
  60                 producer->close = producer_close;
  61
  62                 // Get the properties interface
  63                 mlt_properties properties = mlt_producer_properties( &this->parent );
  64
  65                 // Set the default properties
  66                 mlt_properties_set_int( properties, "video_standard", mlt_video_standard_pal );
  67                 mlt_properties_set_double( properties, "ttl", 5 );
  68
  69                 // Obtain filenames
  70                 if ( strchr( filename, '%' ) != NULL )
  71                 {
  72                         // handle picture sequences
  73                         int i = 0;
  74                         int gap = 0;
  75                         char full[1024];
  76
  77                         while ( gap < 100 )
  78                         {
  79                                 struct stat buf;
  80                                 snprintf( full, 1023, filename, i ++ );
  81                                 if ( stat( full, &buf ) == 0 )
  82                                 {
  83                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
  84                                         this->filenames[ this->count ++ ] = strdup( full );
  85                                         gap = 0;
  86                                 }
  87                                 else
  88                                 {
  89                                         gap ++;
  90                                 }
  91                         }
  92                         mlt_properties_set_timecode( properties, "out", this->count );
  93                 }
  94                 else if ( strstr( filename, "/.all." ) != NULL )
  95                 {
  96                         char *dir_name = strdup( filename );
  97                         char *extension = strrchr( filename, '.' );
  98                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
  99                         char fullname[ 1024 ];
 100                         strcpy( fullname, dir_name );
 101                         struct dirent **de = NULL;
 102                         int n = scandir( fullname, &de, filter_files, alphasort );
 103                         int i;
 104                         struct stat info;
 105
 106                         for (i = 0; i < n; i++ )
 107                         {
 108                                 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
 109
 110                                 if ( lstat( fullname, &info ) == 0 &&
 111                                         ( S_ISREG( info.st_mode ) || ( strstr( fullname, extension ) && info.st_mode | S_IXUSR ) ) )
 112                                 {
 113                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 114                                         this->filenames[ this->count ++ ] = strdup( fullname );
 115                                 }
 116                                 free( de[ i ] );
 117                         }
 118
 119                         mlt_properties_set_timecode( properties, "out", this->count );
 120                         free( de );
 121                         free( dir_name );
 122                 }
 123                 else
 124                 {
 125                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 126                         this->filenames[ this->count ++ ] = strdup( filename );
 127                         mlt_properties_set_timecode( properties, "out", 1 );
 128                 }
 129
 130                 // Initialise gobject types
 131                 g_type_init();
 132
 133                 return producer;
 134         }
 135         free( this );
 136         return NULL;
 137 }
 138
 139 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 140 {
 141         // Obtain properties of frame
 142         mlt_properties properties = mlt_frame_properties( this );
 143
 144         // May need to know the size of the image to clone it
 145         int size = 0;
 146
 147         // Get the image
 148         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 149
 150         // Get width and height
 151         *width = mlt_properties_get_int( properties, "width" );
 152         *height = mlt_properties_get_int( properties, "height" );
 153
 154         // Clone if necessary
 155         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 156         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 157         //if ( writable )
 158         {
 159                 size = *width * *height * 2;
 160
 161                 // Clone our image
 162                 uint8_t *copy = malloc( size );
 163                 memcpy( copy, image, size );
 164
 165                 // We're going to pass the copy on
 166                 image = copy;
 167
 168                 // Now update properties so we free the copy after
 169                 mlt_properties_set_data( properties, "image", copy, size, free, NULL );
 170         }
 171
 172         // Pass on the image
 173         *buffer = image;
 174
 175         return 0;
 176 }
 177
 178 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 179 {
 180         // Obtain properties of frame
 181         mlt_properties properties = mlt_frame_properties( this );
 182
 183         // Return the alpha mask
 184         return mlt_properties_get_data( properties, "alpha", NULL );
 185 }
 186
 187 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 188 {
 189         producer_pixbuf this = producer->child;
 190         GdkPixbuf *pixbuf = NULL;
 191         GError *error = NULL;
 192
 193         // Generate a frame
 194         *frame = mlt_frame_init( );
 195
 196         // Obtain properties of frame
 197         mlt_properties properties = mlt_frame_properties( *frame );
 198
 199         // Get the time to live for each frame
 200         double ttl = mlt_properties_get_double( mlt_producer_properties( producer ), "ttl" );
 201
 202         // Image index
 203         int image_idx = ( int )floor( mlt_producer_position( producer ) / ttl ) % this->count;
 204
 205         // Update timecode on the frame we're creating
 206         mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
 207
 208     // optimization for subsequent iterations on single picture
 209         if ( this->image != NULL && image_idx == this->image_idx )
 210         {
 211                 // Set width/height
 212                 mlt_properties_set_int( properties, "width", this->width );
 213                 mlt_properties_set_int( properties, "height", this->height );
 214
 215                 // if picture sequence pass the image and alpha data without destructor
 216                 mlt_properties_set_data( properties, "image", this->image, 0, NULL, NULL );
 217                 mlt_properties_set_data( properties, "alpha", this->alpha, 0, NULL, NULL );
 218
 219                 // Set alpha mask call back
 220         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 221
 222                 // Stack the get image callback
 223                 mlt_frame_push_get_image( *frame, producer_get_image );
 224         }
 225         else
 226         {
 227                 free( this->image );
 228                 free( this->alpha );
 229                 this->image_idx = image_idx;
 230                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 231         }
 232
 233         // If we have a pixbuf
 234         if ( pixbuf )
 235         {
 236                 // Scale to adjust for sample aspect ratio
 237                 if ( mlt_properties_get_int( properties, "video_standard" ) == mlt_video_standard_pal )
 238                 {
 239                         GdkPixbuf *temp = pixbuf;
 240                         GdkPixbuf *scaled = gdk_pixbuf_scale_simple( pixbuf,
 241                                 (gint) ( (float) gdk_pixbuf_get_width( pixbuf ) * 54.0/59.0),
 242                                 gdk_pixbuf_get_height( pixbuf ), GDK_INTERP_HYPER );
 243                         pixbuf = scaled;
 244                         g_object_unref( temp );
 245                 }
 246                 else
 247                 {
 248                         GdkPixbuf *temp = pixbuf;
 249                         GdkPixbuf *scaled = gdk_pixbuf_scale_simple( pixbuf,
 250                                 (gint) ( (float) gdk_pixbuf_get_width( pixbuf ) * 11.0/10.0 ),
 251                                 gdk_pixbuf_get_height( pixbuf ), GDK_INTERP_HYPER );
 252                         pixbuf = scaled;
 253                         g_object_unref( temp );
 254                 }
 255
 256                 // Store width and height
 257                 this->width = gdk_pixbuf_get_width( pixbuf );
 258                 this->height = gdk_pixbuf_get_height( pixbuf );
 259                 this->width -= this->width % 4;
 260                 this->height -= this->height % 2;
 261
 262                 // Allocate/define image and alpha
 263                 uint8_t *image = malloc( this->width * this->height * 2 );
 264                 uint8_t *alpha = NULL;
 265
 266                 // Extract YUV422 and alpha
 267                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 268                 {
 269                         // Allocate the alpha mask
 270                         alpha = malloc( this->width * this->height );
 271
 272                         // Convert the image
 273                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 274                                                                                   this->width, this->height,
 275                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 276                                                                                   image, alpha );
 277                 }
 278                 else
 279                 {
 280                         // No alpha to extract
 281                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 282                                                                                  this->width, this->height,
 283                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 284                                                                                  image );
 285                 }
 286
 287                 // Finished with pixbuf now
 288                 g_object_unref( pixbuf );
 289
 290                 // Set width/height of frame
 291                 mlt_properties_set_int( properties, "width", this->width );
 292                 mlt_properties_set_int( properties, "height", this->height );
 293
 294                 // Pass alpha and image on properties with or without destructor
 295                 this->image = image;
 296                 this->alpha = alpha;
 297
 298                 // pass the image and alpha data without destructor
 299                 mlt_properties_set_data( properties, "image", image, 0, NULL, NULL );
 300                 mlt_properties_set_data( properties, "alpha", alpha, 0, NULL, NULL );
 301
 302                 // Set alpha call back
 303                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 304
 305                 // Push the get_image method
 306                 mlt_frame_push_get_image( *frame, producer_get_image );
 307         }
 308
 309         // Calculate the next timecode
 310         mlt_producer_prepare_next( producer );
 311
 312         return 0;
 313 }
 314
 315 static void producer_close( mlt_producer parent )
 316 {
 317         producer_pixbuf this = parent->child;
 318         if ( this->image )
 319                 free( this->image );
 320         if ( this->alpha )
 321                 free( this->alpha );
 322         parent->close = NULL;
 323         mlt_producer_close( parent );
 324         free( this );
 325 }
 326