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 typedef struct producer_pixbuf_s *producer_pixbuf;
  35
  36 struct producer_pixbuf_s
  37 {
  38         struct mlt_producer_s parent;
  39
  40         // File name list
  41         char **filenames;
  42         int count;
  43         int image_idx;
  44
  45         int width;
  46         int height;
  47         uint8_t *image;
  48         uint8_t *alpha;
  49 };
  50
  51 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  52 static void producer_close( mlt_producer parent );
  53
  54 static int filter_files( const struct dirent *de )
  55 {
  56         if ( de->d_name[ 0 ] != '.' )
  57                 return 1;
  58         else
  59                 return 0;
  60 }
  61
  62 mlt_producer producer_pixbuf_init( char *filename )
  63 {
  64         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  65         if ( filename != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  66         {
  67                 mlt_producer producer = &this->parent;
  68
  69                 // Get the properties interface
  70                 mlt_properties properties = mlt_producer_properties( &this->parent );
  71
  72                 // Callback registration
  73                 producer->get_frame = producer_get_frame;
  74                 producer->close = producer_close;
  75
  76                 // Set the default properties
  77                 mlt_properties_set( properties, "resource", filename );
  78                 mlt_properties_set_int( properties, "ttl", 25 );
  79
  80                 // Obtain filenames
  81                 if ( strchr( filename, '%' ) != NULL )
  82                 {
  83                         // handle picture sequences
  84                         int i = 0;
  85                         int gap = 0;
  86                         char full[1024];
  87
  88                         while ( gap < 100 )
  89                         {
  90                                 struct stat buf;
  91                                 snprintf( full, 1023, filename, i ++ );
  92                                 if ( stat( full, &buf ) == 0 )
  93                                 {
  94                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
  95                                         this->filenames[ this->count ++ ] = strdup( full );
  96                                         gap = 0;
  97                                 }
  98                                 else
  99                                 {
 100                                         gap ++;
 101                                 }
 102                         }
 103                         mlt_properties_set_position( properties, "out", this->count * 250 );
 104                 }
 105                 else if ( strstr( filename, "/.all." ) != NULL )
 106                 {
 107                         char *dir_name = strdup( filename );
 108                         char *extension = strrchr( filename, '.' );
 109                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 110                         char fullname[ 1024 ];
 111                         strcpy( fullname, dir_name );
 112                         struct dirent **de = NULL;
 113                         int n = scandir( fullname, &de, filter_files, alphasort );
 114                         int i;
 115                         struct stat info;
 116
 117                         for (i = 0; i < n; i++ )
 118                         {
 119                                 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
 120
 121                                 if ( lstat( fullname, &info ) == 0 &&
 122                                         ( S_ISREG( info.st_mode ) || ( strstr( fullname, extension ) && info.st_mode | S_IXUSR ) ) )
 123                                 {
 124                                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 125                                         this->filenames[ this->count ++ ] = strdup( fullname );
 126                                 }
 127                                 free( de[ i ] );
 128                         }
 129
 130                         free( de );
 131                         free( dir_name );
 132                 }
 133                 else
 134                 {
 135                         this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
 136                         this->filenames[ this->count ++ ] = strdup( filename );
 137                         mlt_properties_set_position( properties, "out", 250 );
 138                 }
 139
 140                 // Initialise gobject types
 141                 g_type_init();
 142
 143                 return producer;
 144         }
 145         free( this );
 146         return NULL;
 147 }
 148
 149 static void refresh_image( mlt_frame frame, int width, int height )
 150 {
 151         // Pixbuf
 152         GdkPixbuf *pixbuf = NULL;
 153         GError *error = NULL;
 154
 155         // Obtain properties of frame
 156         mlt_properties properties = mlt_frame_properties( frame );
 157
 158         // Obtain the producer for this frame
 159         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 160
 161         // Obtain the producer
 162         mlt_producer producer = &this->parent;
 163
 164         // Obtain properties of producer
 165         mlt_properties producer_props = mlt_producer_properties( producer );
 166
 167         // Get the time to live for each frame
 168         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 169
 170         // Image index
 171         int image_idx = ( int )floor( mlt_producer_position( producer ) / ttl ) % this->count;
 172
 173         // Update timecode on the frame we're creating
 174         mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 175
 176     // optimization for subsequent iterations on single picture
 177         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 178         {
 179                 if ( width != this->width || height != this->height )
 180                 {
 181                         pixbuf = mlt_properties_get_data( producer_props, "pixbuf", NULL );
 182                         mlt_pool_release( this->image );
 183                         mlt_pool_release( this->alpha );
 184                         this->image = NULL;
 185                         this->alpha = NULL;
 186                 }
 187         }
 188         else if ( this->image == NULL || image_idx != this->image_idx )
 189         {
 190                 mlt_pool_release( this->image );
 191                 mlt_pool_release( this->alpha );
 192                 this->image = NULL;
 193                 this->alpha = NULL;
 194
 195                 this->image_idx = image_idx;
 196                 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
 197
 198                 if ( pixbuf != NULL )
 199                 {
 200                         // Register this pixbuf for destruction and reuse
 201                         mlt_properties_set_data( producer_props, "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 202
 203                         mlt_properties_set_int( producer_props, "real_width", gdk_pixbuf_get_width( pixbuf ) );
 204                         mlt_properties_set_int( producer_props, "real_height", gdk_pixbuf_get_height( pixbuf ) );
 205
 206                         // Store the width/height of the pixbuf temporarily
 207                         this->width = gdk_pixbuf_get_width( pixbuf );
 208                         this->height = gdk_pixbuf_get_height( pixbuf );
 209                 }
 210         }
 211
 212         // If we have a pixbuf
 213         if ( pixbuf && width > 0 )
 214         {
 215                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 216                 int interp = GDK_INTERP_BILINEAR;
 217
 218                 if ( strcmp( interps, "nearest" ) == 0 )
 219                         interp = GDK_INTERP_NEAREST;
 220                 else if ( strcmp( interps, "tiles" ) == 0 )
 221                         interp = GDK_INTERP_TILES;
 222                 else if ( strcmp( interps, "hyper" ) == 0 )
 223                         interp = GDK_INTERP_HYPER;
 224
 225                 // Note - the original pixbuf is already safe and ready for destruction
 226                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 227
 228                 // Store width and height
 229                 this->width = width;
 230                 this->height = height;
 231
 232                 // Allocate/define image
 233                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 234
 235                 // Extract YUV422 and alpha
 236                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 237                 {
 238                         // Allocate the alpha mask
 239                         this->alpha = mlt_pool_alloc( this->width * this->height );
 240
 241                         // Convert the image
 242                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 243                                                                                   this->width, this->height,
 244                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 245                                                                                   this->image, this->alpha );
 246                 }
 247                 else
 248                 {
 249                         // No alpha to extract
 250                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 251                                                                                  this->width, this->height,
 252                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 253                                                                                  this->image );
 254                 }
 255
 256                 // Finished with pixbuf now
 257                 g_object_unref( pixbuf );
 258         }
 259
 260         // Set width/height of frame
 261         mlt_properties_set_int( properties, "width", this->width );
 262         mlt_properties_set_int( properties, "height", this->height );
 263         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
 264         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
 265
 266         // pass the image data without destructor
 267         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 268         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 269 }
 270
 271 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 272 {
 273         // Obtain properties of frame
 274         mlt_properties properties = mlt_frame_properties( frame );
 275
 276         *width = mlt_properties_get_int( properties, "rescale_width" );
 277         *height = mlt_properties_get_int( properties, "rescale_height" );
 278
 279         // Refresh the image
 280         refresh_image( frame, *width, *height );
 281
 282         // Determine format
 283         //mlt_producer this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 284         //*format = ( mlt_properties_get_int( mlt_producer_properties( this ), "bpp" ) == 4 ) ? mlt_image_rgb24a : mlt_image_rgb24;
 285
 286         // May need to know the size of the image to clone it
 287         int size = 0;
 288
 289         // Get the image
 290         uint8_t *image = mlt_properties_get_data( properties, "image", &size );
 291
 292         // Get width and height
 293         *width = mlt_properties_get_int( properties, "width" );
 294         *height = mlt_properties_get_int( properties, "height" );
 295
 296         // Clone if necessary
 297         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 298         // The fault is not in the design of mlt, but in the implementation of pixbuf...
 299         //if ( writable )
 300         {
 301                 // Clone our image
 302                 uint8_t *copy = mlt_pool_alloc( size );
 303                 memcpy( copy, image, size );
 304
 305                 // We're going to pass the copy on
 306                 image = copy;
 307
 308                 // Now update properties so we free the copy after
 309                 mlt_properties_set_data( properties, "image", copy, size, mlt_pool_release, NULL );
 310         }
 311
 312         // Pass on the image
 313         *buffer = image;
 314
 315         return 0;
 316 }
 317
 318 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 319 {
 320         // Obtain properties of frame
 321         mlt_properties properties = mlt_frame_properties( this );
 322
 323         // Return the alpha mask
 324         return mlt_properties_get_data( properties, "alpha", NULL );
 325 }
 326
 327 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 328 {
 329         // Get the real structure for this producer
 330         producer_pixbuf this = producer->child;
 331
 332         // Generate a frame
 333         *frame = mlt_frame_init( );
 334
 335         // Obtain properties of frame and producer
 336         mlt_properties properties = mlt_frame_properties( *frame );
 337
 338         // Set the producer on the frame properties
 339         mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 340
 341         // Refresh the image
 342         refresh_image( *frame, 0, 0 );
 343
 344         // Set producer-specific frame properties
 345         mlt_properties_set_int( properties, "progressive", 1 );
 346         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( properties, "real_width" ) / mlt_properties_get_double( properties, "real_height" ) );
 347
 348         // Set alpha call back
 349         ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 350
 351         // Push the get_image method
 352         mlt_frame_push_get_image( *frame, producer_get_image );
 353
 354         // Calculate the next timecode
 355         mlt_producer_prepare_next( producer );
 356
 357         return 0;
 358 }
 359
 360 static void producer_close( mlt_producer parent )
 361 {
 362         producer_pixbuf this = parent->child;
 363         mlt_pool_release( this->image );
 364         parent->close = NULL;
 365         mlt_producer_close( parent );
 366         free( this );
 367 }
 368