research.m1stereo.tv/gitweb/ - melted/blob - src/modules/fezzik/producer_fezzik.c

   1 /*
   2  * producer_fezzik.c -- a normalising filter
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   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_fezzik.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <ctype.h>
  27 #include <fnmatch.h>
  28
  29 #include <framework/mlt.h>
  30
  31 static mlt_properties dictionary = NULL;
  32
  33 static void track_service( mlt_tractor tractor, void *service, mlt_destructor destructor )
  34 {
  35         mlt_properties properties = mlt_tractor_properties( tractor );
  36         int registered = mlt_properties_get_int( properties, "_registered" );
  37         char *key = mlt_properties_get( properties, "_registered" );
  38         char *real = malloc( strlen( key ) + 2 );
  39         sprintf( real, "_%s", key );
  40         mlt_properties_set_data( properties, real, service, 0, destructor, NULL );
  41         mlt_properties_set_int( properties, "_registered", ++ registered );
  42         free( real );
  43 }
  44
  45 static mlt_producer create_from( char *file, char *services )
  46 {
  47         mlt_producer producer = NULL;
  48         char *temp = strdup( services );
  49         char *service = temp;
  50         do
  51         {
  52                 char *p = strchr( service, ',' );
  53                 if ( p != NULL )
  54                         *p ++ = '\0';
  55                 producer = mlt_factory_producer( service, file );
  56                 service = p;
  57         }
  58         while ( producer == NULL && service != NULL );
  59         free( temp );
  60         return producer;
  61 }
  62
  63 static mlt_producer create_producer( char *file )
  64 {
  65         mlt_producer result = NULL;
  66
  67         // 1st Line - check for service:resource handling
  68         if ( strchr( file, ':' ) )
  69         {
  70                 char *temp = strdup( file );
  71                 char *service = temp;
  72                 char *resource = strchr( temp, ':' );
  73                 *resource ++ = '\0';
  74                 result = mlt_factory_producer( service, resource );
  75                 free( temp );
  76         }
  77
  78         // 2nd Line preferences
  79         if ( result == NULL )
  80         {
  81                 int i = 0;
  82                 char *lookup = strdup( file );
  83                 char *p = lookup;
  84
  85                 // We only need to load the dictionary once
  86                 if ( dictionary == NULL )
  87                 {
  88                         char temp[ 1024 ];
  89                         sprintf( temp, "%s/fezzik.dict", mlt_factory_prefix( ) );
  90                         dictionary = mlt_properties_load( temp );
  91                 }
  92
  93                 // Convert the lookup string to lower case
  94                 while ( *p )
  95                 {
  96                         *p = tolower( *p );
  97                         p ++;
  98                 }
  99
 100                 // Iterate through the dictionary
 101                 for ( i = 0; result == NULL && i < mlt_properties_count( dictionary ); i ++ )
 102                 {
 103                         char *name = mlt_properties_get_name( dictionary, i );
 104                         if ( fnmatch( name, lookup, 0 ) == 0 )
 105                                 result = create_from( file, mlt_properties_get_value( dictionary, i ) );
 106                 }
 107
 108                 free( lookup );
 109         }
 110
 111         return result;
 112 }
 113
 114 static mlt_service create_filter( mlt_tractor tractor, mlt_service last, char *effect )
 115 {
 116         char *id = strdup( effect );
 117         char *arg = strchr( id, ':' );
 118         if ( arg != NULL )
 119                 *arg ++ = '\0';
 120         mlt_filter filter = mlt_factory_filter( id, arg );
 121         if ( filter != NULL )
 122         {
 123                 mlt_filter_connect( filter, last, 0 );
 124                 track_service( tractor, filter, ( mlt_destructor )mlt_filter_close );
 125                 last = mlt_filter_service( filter );
 126         }
 127         free( id );
 128         return last;
 129 }
 130
 131 mlt_producer producer_fezzik_init( char *arg )
 132 {
 133         // Create the producer that the tractor will contain
 134         mlt_producer producer = NULL;
 135
 136         if ( arg != NULL )
 137                 producer = create_producer( arg );
 138
 139         // Build the tractor if we have a producer and it isn't already westley'd :-)
 140         if ( producer != NULL && mlt_properties_get( mlt_producer_properties( producer ), "westley" ) == NULL )
 141         {
 142                 // Construct the tractor
 143                 mlt_tractor tractor = mlt_tractor_init( );
 144
 145                 // Sanity check
 146                 if ( tractor != NULL )
 147                 {
 148                         // Extract the tractor properties
 149                         mlt_properties properties = mlt_tractor_properties( tractor );
 150
 151                         // Our producer will be the last service
 152                         mlt_service last = mlt_producer_service( producer );
 153
 154                         // Set the registered count
 155                         mlt_properties_set_int( properties, "_registered", 0 );
 156
 157                         // Register our producer for seeking in the tractor
 158                         mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 159
 160                         // Now attach normalising filters
 161                         last = create_filter( tractor, last, "deinterlace" );
 162                         last = create_filter( tractor, last, "rescale" );
 163                         last = create_filter( tractor, last, "resize" );
 164                         last = create_filter( tractor, last, "resample" );
 165
 166                         // Connect the tractor to the last
 167                         mlt_tractor_connect( tractor, last );
 168
 169                         // Finally, inherit properties from producer
 170                         mlt_properties_inherit( properties, mlt_producer_properties( producer ) );
 171
 172                         // Now make sure we don't lose our inherited identity
 173                         mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
 174
 175                         // This is a temporary hack to ensure that westley doesn't dig too deep
 176                         // and fezzik doesn't overdo it with throwing rocks...
 177                         mlt_properties_set( properties, "westley", "was here" );
 178
 179                         // We need to ensure that all further properties are mirrored in the producer
 180                         mlt_properties_mirror( properties, mlt_producer_properties( producer ) );
 181
 182                         // Ensure that the inner producer ignores the in point
 183                         mlt_properties_set_int( mlt_producer_properties( producer ), "ignore_points", 1 );
 184
 185                         // Now, we return the producer of the tractor
 186                         producer = mlt_tractor_producer( tractor );
 187                 }
 188         }
 189
 190         // Return the tractor's producer
 191         return producer;
 192 }