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, "ttl", 25 );
  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_position( properties, "out", this->count * 25 );
  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                         free( de );
 120                         free( dir_name );
 121                 }
 122                 else
 123                 {
 124                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 125                         this->filenames[ this->count ++ ] = strdup( filename );
 126                         mlt_properties_set_position( properties, "out", 25 );
 127                 }
 128
 129                 // Initialise gobject types
 130                 g_type_init();
 131
 132                 return producer;
 133         }
 134         free( this );
 135         return NULL;
 136 }
 137
 138 static void refresh_image( mlt_frame frame, int width, int height )
 139 {
 140         // Pixbuf
 141         GdkPixbuf *pixbuf = NULL;
 142         GError *error = NULL;
 143
 144         // Obtain properties of frame
 145         mlt_properties properties = mlt_frame_properties( frame );
 146
 147         // Obtain the producer pango for this frame
 148         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 149
 150         // Obtain the producer
 151         mlt_producer producer = &this->parent;
 152
 153         // Obtain properties of producer
 154         mlt_properties producer_props = mlt_producer_properties( producer );
 155
 156         // Get the time to live for each frame
 157         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 158
 159         // Image index
 160         int image_idx = ( int )floor( mlt_producer_position( producer ) / ttl ) % this->count;
 161
 162         // Update timecode on the frame we're creating
 163         mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 164
 165     // optimization for subsequent iterations on single picture
 166         if ( this->image != NULL && image_idx == this->image_idx )
 167         {
 168                 if ( width != this->width || height != this->height )
 169                 {
 170                         pixbuf = mlt_properties_get_data( producer_props, "pixbuf", NULL );
 171                 }
 172         }
 173         else
 174         {
 175                 free( this->image );
 176                 this->image = NULL;
 177                 free( this->alpha );
 178                 this->alpha = NULL;
 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         }
 195
 196         // If we have a pixbuf
 197         if ( pixbuf && width > 0 )
 198         {
 199                 // Note - the original pixbuf is already safe and ready for destruction
 200                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, GDK_INTERP_HYPER );
 201
 202                 // Store width and height
 203                 this->width = gdk_pixbuf_get_width( pixbuf );
 204                 this->height = gdk_pixbuf_get_height( pixbuf );
 205
 206                 // Allocate/define image and alpha
 207                 uint8_t *image = malloc( this->width * this->height * 2 );
 208                 uint8_t *alpha = NULL;
 209
 210                 // Extract YUV422 and alpha
 211                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 212                 {
 213                         // Allocate the alpha mask
 214                         alpha = malloc( this->width * this->height );
 215
 216                         // Convert the image
 217                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 218                                                                                   this->width, this->height,
 219                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 220                                                                                   image, alpha );
 221                 }
 222                 else
 223                 {
 224                         // No alpha to extract
 225                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 226                                                                                  this->width, this->height,
 227                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 228                                                                                  image );
 229                 }
 230
 231                 // Finished with pixbuf now
 232                 g_object_unref( pixbuf );
 233
 234                 // Pass alpha and image on properties with or without destructor
 235                 this->image = image;
 236                 this->alpha = alpha;
 237         }
 238
 239         // Set width/height of frame
 240         mlt_properties_set_int( properties, "width", this->width );
 241         mlt_properties_set_int( properties, "height", this->height );
 242         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
 243         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
 244
 245         // pass the image and alpha data without destructor
 246         mlt_properties_set_data( properties, "image", this->image, this->width * this->height * 2, NULL, NULL );
 247         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 248 }
 249
 250 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 251 {
 252         // Obtain properties of frame
 253         mlt_properties properties = mlt_frame_properties( frame );
 254
 255         // Refresh the image
 256         refresh_image( frame, *width, *height );
 257
 258         // May need to know the size of the image to clone it
 259         int size = 0;
 260
 261         // Get the image
 262         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 263
 264         // Get width and height
 265         *width = mlt_properties_get_int( properties, "width" );
 266         *height = mlt_properties_get_int( properties, "height" );
 267
 268         // Clone if necessary
 269         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 270         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 271         //if ( writable )
 272         {
 273                 size = *width * *height * 2;
 274
 275                 // Clone our image
 276                 uint8_t *copy = malloc( size );
 277                 memcpy( copy, image, size );
 278
 279                 // We're going to pass the copy on
 280                 image = copy;
 281
 282                 // Now update properties so we free the copy after
 283                 mlt_properties_set_data( properties, "image", copy, size, free, NULL );
 284         }
 285
 286         // Pass on the image
 287         *buffer = image;
 288
 289         return 0;
 290 }
 291
 292 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 293 {
 294         // Obtain properties of frame
 295         mlt_properties properties = mlt_frame_properties( this );
 296
 297         // Return the alpha mask
 298         return mlt_properties_get_data( properties, "alpha", NULL );
 299 }
 300
 301 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 302 {
 303         // Get the real structure for this producer
 304         producer_pixbuf this = producer->child;
 305
 306         // Generate a frame
 307         *frame = mlt_frame_init( );
 308
 309         // Obtain properties of frame and producer
 310         mlt_properties properties = mlt_frame_properties( *frame );
 311
 312         // Set the producer on the frame properties
 313         mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 314
 315         // Refresh the pango image
 316         refresh_image( *frame, 0, 0 );
 317
 318         // Set alpha call back
 319         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 320
 321         // Push the get_image method
 322         mlt_frame_push_get_image( *frame, producer_get_image );
 323
 324         // Calculate the next timecode
 325         mlt_producer_prepare_next( producer );
 326
 327         return 0;
 328 }
 329
 330 static void producer_close( mlt_producer parent )
 331 {
 332         producer_pixbuf this = parent->child;
 333         free( this->image );
 334         free( this->alpha );
 335         parent->close = NULL;
 336         mlt_producer_close( parent );
 337         free( this );
 338 }
 339