research.m1stereo.tv/gitweb/ - melted/blob - mlt/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( char *filename )
  53 {
  54         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  55         if ( filename != NULL && 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( properties, "resource", filename );
  67                 mlt_properties_set_int( properties, "video_standard", mlt_video_standard_pal );
  68                 mlt_properties_set_double( properties, "ttl", 5 );
  69
  70                 // Obtain filenames
  71                 if ( strchr( filename, '%' ) != NULL )
  72                 {
  73                         // handle picture sequences
  74                         int i = 0;
  75                         int gap = 0;
  76                         char full[1024];
  77
  78                         while ( gap < 100 )
  79                         {
  80                                 struct stat buf;
  81                                 snprintf( full, 1023, filename, i ++ );
  82                                 if ( stat( full, &buf ) == 0 )
  83                                 {
  84                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
  85                                         this->filenames[ this->count ++ ] = strdup( full );
  86                                         gap = 0;
  87                                 }
  88                                 else
  89                                 {
  90                                         gap ++;
  91                                 }
  92                         }
  93                         mlt_properties_set_timecode( properties, "out", this->count );
  94                 }
  95                 else if ( strstr( filename, "/.all." ) != NULL )
  96                 {
  97                         char *dir_name = strdup( filename );
  98                         char *extension = strrchr( filename, '.' );
  99                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 100                         char fullname[ 1024 ];
 101                         strcpy( fullname, dir_name );
 102                         struct dirent **de = NULL;
 103                         int n = scandir( fullname, &de, filter_files, alphasort );
 104                         int i;
 105                         struct stat info;
 106
 107                         for (i = 0; i < n; i++ )
 108                         {
 109                                 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
 110
 111                                 if ( lstat( fullname, &info ) == 0 &&
 112                                         ( S_ISREG( info.st_mode ) || ( strstr( fullname, extension ) && info.st_mode | S_IXUSR ) ) )
 113                                 {
 114                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 115                                         this->filenames[ this->count ++ ] = strdup( fullname );
 116                                 }
 117                                 free( de[ i ] );
 118                         }
 119
 120                         mlt_properties_set_timecode( properties, "out", this->count );
 121                         free( de );
 122                         free( dir_name );
 123                 }
 124                 else
 125                 {
 126                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 127                         this->filenames[ this->count ++ ] = strdup( filename );
 128                         mlt_properties_set_timecode( properties, "out", 1 );
 129                 }
 130
 131                 // Initialise gobject types
 132                 g_type_init();
 133
 134                 return producer;
 135         }
 136         free( this );
 137         return NULL;
 138 }
 139
 140 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 141 {
 142         // Obtain properties of frame
 143         mlt_properties properties = mlt_frame_properties( this );
 144
 145         // May need to know the size of the image to clone it
 146         int size = 0;
 147
 148         // Get the image
 149         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 150
 151         // Get width and height
 152         *width = mlt_properties_get_int( properties, "width" );
 153         *height = mlt_properties_get_int( properties, "height" );
 154
 155         // Clone if necessary
 156         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 157         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 158         //if ( writable )
 159         {
 160                 size = *width * *height * 2;
 161
 162                 // Clone our image
 163                 uint8_t *copy = malloc( size );
 164                 memcpy( copy, image, size );
 165
 166                 // We're going to pass the copy on
 167                 image = copy;
 168
 169                 // Now update properties so we free the copy after
 170                 mlt_properties_set_data( properties, "image", copy, size, free, NULL );
 171         }
 172
 173         // Pass on the image
 174         *buffer = image;
 175
 176         return 0;
 177 }
 178
 179 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 180 {
 181         // Obtain properties of frame
 182         mlt_properties properties = mlt_frame_properties( this );
 183
 184         // Return the alpha mask
 185         return mlt_properties_get_data( properties, "alpha", NULL );
 186 }
 187
 188 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 189 {
 190         producer_pixbuf this = producer->child;
 191         GdkPixbuf *pixbuf = NULL;
 192         GError *error = NULL;
 193
 194         // Generate a frame
 195         *frame = mlt_frame_init( );
 196
 197         // Obtain properties of frame
 198         mlt_properties properties = mlt_frame_properties( *frame );
 199
 200         // Get the time to live for each frame
 201         double ttl = mlt_properties_get_double( mlt_producer_properties( producer ), "ttl" );
 202
 203         // Image index
 204         int image_idx = ( int )floor( mlt_producer_position( producer ) / ttl ) % this->count;
 205
 206         // Update timecode on the frame we're creating
 207         mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
 208
 209     // optimization for subsequent iterations on single picture
 210         if ( this->image != NULL && image_idx == this->image_idx )
 211         {
 212                 // Set width/height
 213                 mlt_properties_set_int( properties, "width", this->width );
 214                 mlt_properties_set_int( properties, "height", this->height );
 215
 216                 // if picture sequence pass the image and alpha data without destructor
 217                 mlt_properties_set_data( properties, "image", this->image, 0, NULL, NULL );
 218                 mlt_properties_set_data( properties, "alpha", this->alpha, 0, NULL, NULL );
 219
 220                 // Set alpha mask call back
 221         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 222
 223                 // Stack the get image callback
 224                 mlt_frame_push_get_image( *frame, producer_get_image );
 225         }
 226         else
 227         {
 228                 free( this->image );
 229                 free( this->alpha );
 230                 this->image_idx = image_idx;
 231                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 232         }
 233
 234         // If we have a pixbuf
 235         if ( pixbuf )
 236         {
 237                 // Scale to adjust for sample aspect ratio
 238                 if ( mlt_properties_get_int( properties, "video_standard" ) == mlt_video_standard_pal )
 239                 {
 240                         GdkPixbuf *temp = pixbuf;
 241                         GdkPixbuf *scaled = gdk_pixbuf_scale_simple( pixbuf,
 242                                 (gint) ( (float) gdk_pixbuf_get_width( pixbuf ) * 54.0/59.0),
 243                                 gdk_pixbuf_get_height( pixbuf ), GDK_INTERP_HYPER );
 244                         pixbuf = scaled;
 245                         g_object_unref( temp );
 246                 }
 247                 else
 248                 {
 249                         GdkPixbuf *temp = pixbuf;
 250                         GdkPixbuf *scaled = gdk_pixbuf_scale_simple( pixbuf,
 251                                 (gint) ( (float) gdk_pixbuf_get_width( pixbuf ) * 11.0/10.0 ),
 252                                 gdk_pixbuf_get_height( pixbuf ), GDK_INTERP_HYPER );
 253                         pixbuf = scaled;
 254                         g_object_unref( temp );
 255                 }
 256
 257                 // Store width and height
 258                 this->width = gdk_pixbuf_get_width( pixbuf );
 259                 this->height = gdk_pixbuf_get_height( pixbuf );
 260                 this->width -= this->width % 4;
 261                 this->height -= this->height % 2;
 262
 263                 // Allocate/define image and alpha
 264                 uint8_t *image = malloc( this->width * this->height * 2 );
 265                 uint8_t *alpha = NULL;
 266
 267                 // Extract YUV422 and alpha
 268                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 269                 {
 270                         // Allocate the alpha mask
 271                         alpha = malloc( this->width * this->height );
 272
 273                         // Convert the image
 274                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 275                                                                                   this->width, this->height,
 276                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 277                                                                                   image, alpha );
 278                 }
 279                 else
 280                 {
 281                         // No alpha to extract
 282                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 283                                                                                  this->width, this->height,
 284                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 285                                                                                  image );
 286                 }
 287
 288                 // Finished with pixbuf now
 289                 g_object_unref( pixbuf );
 290
 291                 // Set width/height of frame
 292                 mlt_properties_set_int( properties, "width", this->width );
 293                 mlt_properties_set_int( properties, "height", this->height );
 294
 295                 // Pass alpha and image on properties with or without destructor
 296                 this->image = image;
 297                 this->alpha = alpha;
 298
 299                 // pass the image and alpha data without destructor
 300                 mlt_properties_set_data( properties, "image", image, 0, NULL, NULL );
 301                 mlt_properties_set_data( properties, "alpha", alpha, 0, NULL, NULL );
 302
 303                 // Set alpha call back
 304                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 305
 306                 // Push the get_image method
 307                 mlt_frame_push_get_image( *frame, producer_get_image );
 308         }
 309
 310         // Calculate the next timecode
 311         mlt_producer_prepare_next( producer );
 312
 313         return 0;
 314 }
 315
 316 static void producer_close( mlt_producer parent )
 317 {
 318         producer_pixbuf this = parent->child;
 319         if ( this->image )
 320                 free( this->image );
 321         if ( this->alpha )
 322                 free( this->alpha );
 323         parent->close = NULL;
 324         mlt_producer_close( parent );
 325         free( this );
 326 }
 327