research.m1stereo.tv/gitweb/ - melted/blob - src/modules/gtk2/producer_pixbuf.c

   1
   2 /*
   3  * producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
   4  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   5  * Author: Dan Dennedy <dan@dennedy.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software Foundation,
  19  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include "producer_pixbuf.h"
  23 #include <framework/mlt_frame.h>
  24 #include <gdk-pixbuf/gdk-pixbuf.h>
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <math.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34 #include <dirent.h>
  35
  36 static pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER;
  37
  38 typedef struct producer_pixbuf_s *producer_pixbuf;
  39
  40 struct producer_pixbuf_s
  41 {
  42         struct mlt_producer_s parent;
  43
  44         // File name list
  45         mlt_properties filenames;
  46         int count;
  47         int image_idx;
  48
  49         int width;
  50         int height;
  51         uint8_t *image;
  52         uint8_t *alpha;
  53 };
  54
  55 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  56 static void producer_close( mlt_producer parent );
  57
  58
  59 mlt_producer producer_pixbuf_init( char *filename )
  60 {
  61         producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  62         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  63         {
  64                 mlt_producer producer = &this->parent;
  65
  66                 // Get the properties interface
  67                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
  68
  69                 // Callback registration
  70                 producer->get_frame = producer_get_frame;
  71                 producer->close = ( mlt_destructor )producer_close;
  72
  73                 // Set the default properties
  74                 mlt_properties_set( properties, "resource", filename );
  75                 mlt_properties_set_int( properties, "ttl", 25 );
  76                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  77                 mlt_properties_set_int( properties, "progressive", 1 );
  78
  79                 return producer;
  80         }
  81         free( this );
  82         return NULL;
  83 }
  84
  85 static void refresh_image( mlt_frame frame, int width, int height )
  86 {
  87         // Pixbuf
  88         GdkPixbuf *pixbuf = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", NULL );
  89         GError *error = NULL;
  90
  91         // Obtain properties of frame
  92         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  93
  94         // Obtain the producer for this frame
  95         producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
  96
  97         // Obtain the producer
  98         mlt_producer producer = &this->parent;
  99
 100         // Obtain properties of producer
 101         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 102
 103         // Get the time to live for each frame
 104         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 105
 106         // Get the original position of this frame
 107         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 108
 109         // Image index
 110         int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
 111
 112         pthread_mutex_lock( &fastmutex );
 113
 114     // optimization for subsequent iterations on single picture
 115         if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
 116         {
 117                 if ( width != this->width || height != this->height )
 118                 {
 119                         pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
 120                         mlt_pool_release( this->image );
 121                         mlt_pool_release( this->alpha );
 122                         this->image = NULL;
 123                         this->alpha = NULL;
 124                 }
 125         }
 126         else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
 127         {
 128                 mlt_pool_release( this->image );
 129                 mlt_pool_release( this->alpha );
 130                 this->image = NULL;
 131                 this->alpha = NULL;
 132
 133                 this->image_idx = image_idx;
 134                 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
 135
 136                 if ( pixbuf != NULL )
 137                 {
 138                         // Register this pixbuf for destruction and reuse
 139                         mlt_events_block( producer_props, NULL );
 140                         mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 141                         g_object_ref( pixbuf );
 142                         mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
 143
 144                         mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
 145                         mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
 146                         mlt_events_unblock( producer_props, NULL );
 147
 148                         // Store the width/height of the pixbuf temporarily
 149                         this->width = gdk_pixbuf_get_width( pixbuf );
 150                         this->height = gdk_pixbuf_get_height( pixbuf );
 151                 }
 152         }
 153
 154         // If we have a pixbuf
 155         if ( pixbuf && width > 0 )
 156         {
 157                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 158                 int interp = GDK_INTERP_BILINEAR;
 159
 160                 if ( strcmp( interps, "nearest" ) == 0 )
 161                         interp = GDK_INTERP_NEAREST;
 162                 else if ( strcmp( interps, "tiles" ) == 0 )
 163                         interp = GDK_INTERP_TILES;
 164                 else if ( strcmp( interps, "hyper" ) == 0 )
 165                         interp = GDK_INTERP_HYPER;
 166
 167                 // Note - the original pixbuf is already safe and ready for destruction
 168                 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
 169
 170                 // Store width and height
 171                 this->width = width;
 172                 this->height = height;
 173
 174                 // Allocate/define image
 175                 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
 176
 177                 // Extract YUV422 and alpha
 178                 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
 179                 {
 180                         // Allocate the alpha mask
 181                         this->alpha = mlt_pool_alloc( this->width * this->height );
 182
 183                         // Convert the image
 184                         mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 185                                                                                   this->width, this->height,
 186                                                                                   gdk_pixbuf_get_rowstride( pixbuf ),
 187                                                                                   this->image, this->alpha );
 188                 }
 189                 else
 190                 {
 191                         // No alpha to extract
 192                         mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
 193                                                                                  this->width, this->height,
 194                                                                                  gdk_pixbuf_get_rowstride( pixbuf ),
 195                                                                                  this->image );
 196                 }
 197
 198                 // Finished with pixbuf now
 199                 g_object_unref( pixbuf );
 200         }
 201
 202         // Set width/height of frame
 203         mlt_properties_set_int( properties, "width", this->width );
 204         mlt_properties_set_int( properties, "height", this->height );
 205         mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
 206         mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
 207
 208         // pass the image data without destructor
 209         mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
 210         mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
 211
 212         pthread_mutex_unlock( &fastmutex );
 213 }
 214
 215 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 216 {
 217         // Obtain properties of frame
 218         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 219
 220         // We need to know the size of the image to clone it
 221         int image_size = 0;
 222         int alpha_size = 0;
 223
 224         // Alpha channel
 225         uint8_t *alpha = NULL;
 226
 227         *width = mlt_properties_get_int( properties, "rescale_width" );
 228         *height = mlt_properties_get_int( properties, "rescale_height" );
 229
 230         // Refresh the image
 231         refresh_image( frame, *width, *height );
 232
 233         // Get the image
 234         *buffer = mlt_properties_get_data( properties, "image", &image_size );
 235         alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
 236
 237         // Get width and height (may have changed during the refresh)
 238         *width = mlt_properties_get_int( properties, "width" );
 239         *height = mlt_properties_get_int( properties, "height" );
 240
 241         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 242         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 243         if ( *buffer != NULL )
 244         {
 245
 246                 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 247                 {
 248                         // Clone the image and the alpha
 249                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 250                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 251
 252                         memcpy( image_copy, *buffer, image_size );
 253
 254                         // Copy or default the alpha
 255                         if ( alpha != NULL )
 256                                 memcpy( alpha_copy, alpha, alpha_size );
 257                         else
 258                                 memset( alpha_copy, 255, alpha_size );
 259
 260                         // Now update properties so we free the copy after
 261                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 262                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 263
 264                         // We're going to pass the copy on
 265                         *buffer = image_copy;
 266                 }
 267                 else if ( *format == mlt_image_rgb24a )
 268                 {
 269                         // Clone the image and the alpha
 270                         image_size = *width * ( *height + 1 ) * 4;
 271                         alpha_size = *width * ( *height + 1 );
 272                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 273                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 274
 275                         mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
 276
 277                         // Now update properties so we free the copy after
 278                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 279                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 280
 281                         // We're going to pass the copy on
 282                         *buffer = image_copy;
 283                 }
 284         }
 285         else
 286         {
 287                 // TODO: Review all cases of invalid images
 288                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 289                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 290                 *width = 50;
 291                 *height = 50;
 292         }
 293
 294         return 0;
 295 }
 296
 297
 298 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 299 {
 300         // Obtain properties of frame
 301         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 302
 303         // Return the alpha mask
 304         return mlt_properties_get_data( properties, "alpha", NULL );
 305 }
 306
 307 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 308 {
 309         // Get the real structure for this producer
 310         producer_pixbuf this = producer->child;
 311
 312         // Fetch the producers properties
 313         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 314
 315         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 316         {
 317                 char *filename = mlt_properties_get( producer_properties, "resource" );
 318                 this->filenames = mlt_properties_new( );
 319
 320                 // Read xml string
 321                 if ( strstr( filename, "<svg" ) )
 322                 {
 323                         // Generate a temporary file for the svg
 324                         char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 325                         int fd = mkstemp( fullname );
 326
 327                         if ( fd > -1 )
 328                         {
 329                                 // Write the svg into the temp file
 330                                 ssize_t remaining_bytes;
 331                                 char *xml = filename;
 332
 333                                 // Strip leading crap
 334                                 while ( xml[0] != '<' )
 335                                         xml++;
 336
 337                                 remaining_bytes = strlen( xml );
 338                                 while ( remaining_bytes > 0 )
 339                                         remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 340                                 close( fd );
 341
 342                                 mlt_properties_set( this->filenames, "0", fullname );
 343
 344                                 // Teehe - when the producer closes, delete the temp file and the space allo
 345                                 mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 346                         }
 347                 }
 348                 // Obtain filenames
 349                 else if ( strchr( filename, '%' ) != NULL )
 350                 {
 351                         // handle picture sequences
 352                         int i = mlt_properties_get_int( producer_properties, "begin" );
 353                         int gap = 0;
 354                         char full[1024];
 355                         int keyvalue = 0;
 356                         char key[ 50 ];
 357
 358                         while ( gap < 100 )
 359                         {
 360                                 struct stat buf;
 361                                 snprintf( full, 1023, filename, i ++ );
 362                                 if ( stat( full, &buf ) == 0 )
 363                                 {
 364                                         sprintf( key, "%d", keyvalue ++ );
 365                                         mlt_properties_set( this->filenames, "0", full );
 366                                         gap = 0;
 367                                 }
 368                                 else
 369                                 {
 370                                         gap ++;
 371                                 }
 372                         }
 373                 }
 374                 else if ( strstr( filename, "/.all." ) != NULL )
 375                 {
 376                         char wildcard[ 1024 ];
 377                         char *dir_name = strdup( filename );
 378                         char *extension = strrchr( dir_name, '.' );
 379
 380                         *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 381                         sprintf( wildcard, "*%s", extension );
 382
 383                         mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 384
 385                         free( dir_name );
 386                 }
 387                 else
 388                 {
 389                         mlt_properties_set( this->filenames, "0", filename );
 390                 }
 391
 392                 this->count = mlt_properties_count( this->filenames );
 393         }
 394
 395         // Generate a frame
 396         *frame = mlt_frame_init( );
 397
 398         if ( *frame != NULL && this->count > 0 )
 399         {
 400                 // Obtain properties of frame and producer
 401                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 402
 403                 // Set the producer on the frame properties
 404                 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
 405
 406                 // Update timecode on the frame we're creating
 407                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 408
 409                 // Ensure that we have a way to obtain the position in the get_image
 410                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 411
 412                 // Refresh the image
 413                 refresh_image( *frame, 0, 0 );
 414
 415                 // Set producer-specific frame properties
 416                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 417                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 418
 419                 // Set alpha call back
 420                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 421
 422                 // Push the get_image method
 423                 mlt_frame_push_get_image( *frame, producer_get_image );
 424         }
 425
 426         // Calculate the next timecode
 427         mlt_producer_prepare_next( producer );
 428
 429         return 0;
 430 }
 431
 432 static void producer_close( mlt_producer parent )
 433 {
 434         producer_pixbuf this = parent->child;
 435         mlt_pool_release( this->image );
 436         mlt_pool_release( this->alpha );
 437         parent->close = NULL;
 438         mlt_producer_close( parent );
 439         mlt_properties_close( this->filenames );
 440         free( this );
 441 }