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( 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_int( properties, "ttl", 25 );
  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_position( properties, "out", this->count * 25 );
  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                         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_position( properties, "out", 25 );
 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 void refresh_image( mlt_frame frame, int width, int height )
 140 {
 141         // Pixbuf
 142         GdkPixbuf *pixbuf = NULL;
 143         GError *error = NULL;
 144
 145         // Obtain properties of frame
 146         mlt_properties properties = mlt_frame_properties( frame );
 147
 148         // Obtain the producer pango for this frame
 149         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 150
 151         // Obtain the producer
 152         mlt_producer producer = &this->parent;
 153
 154         // Obtain properties of producer
 155         mlt_properties producer_props = mlt_producer_properties( producer );
 156
 157         // Get the time to live for each frame
 158         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 159
 160         // Image index
 161         int image_idx = ( int )floor( mlt_producer_position( producer ) / ttl ) % this->count;
 162
 163         // Update timecode on the frame we're creating
 164         mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 165
 166     // optimization for subsequent iterations on single picture
 167         if ( this->image != NULL && image_idx == this->image_idx )
 168         {
 169                 if ( width != this->width || height != this->height )
 170                 {
 171                         pixbuf = mlt_properties_get_data( producer_props, "pixbuf", NULL );
 172                 }
 173         }
 174         else
 175         {
 176                 free( this->image );
 177                 this->image = NULL;
 178                 free( this->alpha );
 179                 this->alpha = NULL;
 180                 this->image_idx = image_idx;
 181                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 182
 183                 if ( pixbuf != NULL )
 184                 {
 185                         // Register this pixbuf for destruction and reuse
 186                         mlt_properties_set_data( producer_props, "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 187
 188                         mlt_properties_set_int( producer_props, "real_width", gdk_pixbuf_get_width( pixbuf ) );
 189                         mlt_properties_set_int( producer_props, "real_height", gdk_pixbuf_get_height( pixbuf ) );
 190
 191                         // Store the width/height of the pixbuf temporarily
 192                         this->width = gdk_pixbuf_get_width( pixbuf );
 193                         this->height = gdk_pixbuf_get_height( pixbuf );
 194                 }
 195         }
 196
 197         // If we have a pixbuf
 198         if ( pixbuf && width > 0 )
 199         {
 200                 // Note - the original pixbuf is already safe and ready for destruction
 201                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, GDK_INTERP_HYPER );
 202
 203                 // Store width and height
 204                 this->width = gdk_pixbuf_get_width( pixbuf );
 205                 this->height = gdk_pixbuf_get_height( pixbuf );
 206
 207                 // Allocate/define image and alpha
 208                 uint8_t *image = malloc( this->width * this->height * 2 );
 209                 uint8_t *alpha = NULL;
 210
 211                 // Extract YUV422 and alpha
 212                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 213                 {
 214                         // Allocate the alpha mask
 215                         alpha = malloc( this->width * this->height );
 216
 217                         // Convert the image
 218                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 219                                                                                   this->width, this->height,
 220                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 221                                                                                   image, alpha );
 222                 }
 223                 else
 224                 {
 225                         // No alpha to extract
 226                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 227                                                                                  this->width, this->height,
 228                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 229                                                                                  image );
 230                 }
 231
 232                 // Finished with pixbuf now
 233                 g_object_unref( pixbuf );
 234
 235                 // Pass alpha and image on properties with or without destructor
 236                 this->image = image;
 237                 this->alpha = alpha;
 238         }
 239
 240         // Set width/height of frame
 241         mlt_properties_set_int( properties, "width", this->width );
 242         mlt_properties_set_int( properties, "height", this->height );
 243         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
 244         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
 245
 246         // pass the image and alpha data without destructor
 247         mlt_properties_set_data( properties, "image", this->image, this->width * this->height * 2, NULL, NULL );
 248         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 249 }
 250
 251 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 252 {
 253         // Obtain properties of frame
 254         mlt_properties properties = mlt_frame_properties( frame );
 255
 256         // Refresh the image
 257         refresh_image( frame, *width, *height );
 258
 259         // May need to know the size of the image to clone it
 260         int size = 0;
 261
 262         // Get the image
 263         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 264
 265         // Get width and height
 266         *width = mlt_properties_get_int( properties, "width" );
 267         *height = mlt_properties_get_int( properties, "height" );
 268
 269         // Clone if necessary
 270         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 271         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 272         //if ( writable )
 273         {
 274                 size = *width * *height * 2;
 275
 276                 // Clone our image
 277                 uint8_t *copy = malloc( size );
 278                 memcpy( copy, image, size );
 279
 280                 // We're going to pass the copy on
 281                 image = copy;
 282
 283                 // Now update properties so we free the copy after
 284                 mlt_properties_set_data( properties, "image", copy, size, free, NULL );
 285         }
 286
 287         // Pass on the image
 288         *buffer = image;
 289
 290         return 0;
 291 }
 292
 293 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 294 {
 295         // Obtain properties of frame
 296         mlt_properties properties = mlt_frame_properties( this );
 297
 298         // Return the alpha mask
 299         return mlt_properties_get_data( properties, "alpha", NULL );
 300 }
 301
 302 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 303 {
 304         // Get the real structure for this producer
 305         producer_pixbuf this = producer->child;
 306
 307         // Generate a frame
 308         *frame = mlt_frame_init( );
 309
 310         // Obtain properties of frame and producer
 311         mlt_properties properties = mlt_frame_properties( *frame );
 312
 313         // Set the producer on the frame properties
 314         mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 315
 316         // Refresh the pango image
 317         refresh_image( *frame, 0, 0 );
 318
 319         // Set alpha call back
 320         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 321
 322         // Push the get_image method
 323         mlt_frame_push_get_image( *frame, producer_get_image );
 324
 325         // Calculate the next timecode
 326         mlt_producer_prepare_next( producer );
 327
 328         return 0;
 329 }
 330
 331 static void producer_close( mlt_producer parent )
 332 {
 333         producer_pixbuf this = parent->child;
 334         free( this->image );
 335         free( this->alpha );
 336         parent->close = NULL;
 337         mlt_producer_close( parent );
 338         free( this );
 339 }
 340