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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <ctype.h>
  25 #include <fnmatch.h>
  26 #include <assert.h>
  27
  28 #include <framework/mlt.h>
  29
  30 static mlt_properties dictionary = NULL;
  31 static mlt_properties normalisers = NULL;
  32
  33 static mlt_producer create_from( mlt_profile profile, char *file, char *services )
  34 {
  35         mlt_producer producer = NULL;
  36         char *temp = strdup( services );
  37         char *service = temp;
  38         do
  39         {
  40                 char *p = strchr( service, ',' );
  41                 if ( p != NULL )
  42                         *p ++ = '\0';
  43                 producer = mlt_factory_producer( profile, service, file );
  44                 service = p;
  45         }
  46         while ( producer == NULL && service != NULL );
  47         free( temp );
  48         return producer;
  49 }
  50
  51 static mlt_producer create_producer( mlt_profile profile, char *file )
  52 {
  53         mlt_producer result = NULL;
  54
  55         // 1st Line - check for service:resource handling
  56         if ( strchr( file, ':' ) )
  57         {
  58                 char *temp = strdup( file );
  59                 char *service = temp;
  60                 char *resource = strchr( temp, ':' );
  61                 *resource ++ = '\0';
  62                 result = mlt_factory_producer( profile, service, resource );
  63                 free( temp );
  64         }
  65
  66         // 2nd Line preferences
  67         if ( result == NULL )
  68         {
  69                 int i = 0;
  70                 char *lookup = strdup( file );
  71                 char *p = lookup;
  72
  73                 // We only need to load the dictionary once
  74                 if ( dictionary == NULL )
  75                 {
  76                         char temp[ 1024 ];
  77                         sprintf( temp, "%s/fezzik.dict", mlt_environment( "MLT_DATA" ) );
  78                         dictionary = mlt_properties_load( temp );
  79                         mlt_factory_register_for_clean_up( dictionary, ( mlt_destructor )mlt_properties_close );
  80                 }
  81
  82                 // Convert the lookup string to lower case
  83                 while ( *p )
  84                 {
  85                         *p = tolower( *p );
  86                         p ++;
  87                 }
  88
  89                 // Iterate through the dictionary
  90                 for ( i = 0; result == NULL && i < mlt_properties_count( dictionary ); i ++ )
  91                 {
  92                         char *name = mlt_properties_get_name( dictionary, i );
  93                         if ( fnmatch( name, lookup, 0 ) == 0 )
  94                                 result = create_from( profile, file, mlt_properties_get_value( dictionary, i ) );
  95                 }
  96
  97                 free( lookup );
  98         }
  99
 100         // Finally, try just loading as service
 101         if ( result == NULL )
 102                 result = mlt_factory_producer( profile, file, NULL );
 103
 104         return result;
 105 }
 106
 107 static void create_filter( mlt_profile profile, mlt_producer producer, char *effect, int *created )
 108 {
 109         // The swscale filter can not handle images with a width > 2048 and the
 110         // sdl_image producer does not scale on its own
 111         if ( strncmp( effect, "swscale", 7 ) == 0 &&
 112              mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( producer ), "_real_width" ) > 2048 &&
 113              strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" ), "sdl_image" ) == 0 )
 114                 return;
 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( profile, id, arg );
 121         if ( filter != NULL )
 122         {
 123                 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "_fezzik", 1 );
 124                 mlt_producer_attach( producer, filter );
 125                 mlt_filter_close( filter );
 126                 *created = 1;
 127         }
 128         free( id );
 129 }
 130
 131 static void attach_normalisers( mlt_profile profile, mlt_producer producer )
 132 {
 133         // Loop variable
 134         int i;
 135
 136         // Tokeniser
 137         mlt_tokeniser tokeniser = mlt_tokeniser_init( );
 138
 139         // We only need to load the normalising properties once
 140         if ( normalisers == NULL )
 141         {
 142                 char temp[ 1024 ];
 143                 sprintf( temp, "%s/fezzik.ini", mlt_environment( "MLT_DATA" ) );
 144                 normalisers = mlt_properties_load( temp );
 145                 mlt_factory_register_for_clean_up( normalisers, ( mlt_destructor )mlt_properties_close );
 146         }
 147
 148         // Apply normalisers
 149         for ( i = 0; i < mlt_properties_count( normalisers ); i ++ )
 150         {
 151                 int j = 0;
 152                 int created = 0;
 153                 char *value = mlt_properties_get_value( normalisers, i );
 154                 mlt_tokeniser_parse_new( tokeniser, value, "," );
 155                 for ( j = 0; !created && j < mlt_tokeniser_count( tokeniser ); j ++ )
 156                         create_filter( profile, producer, mlt_tokeniser_get_string( tokeniser, j ), &created );
 157         }
 158
 159         // Close the tokeniser
 160         mlt_tokeniser_close( tokeniser );
 161 }
 162
 163 mlt_producer producer_fezzik_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 164 {
 165         // Create the producer
 166         mlt_producer producer = NULL;
 167         mlt_properties properties = NULL;
 168
 169         if ( arg != NULL )
 170                 producer = create_producer( profile, arg );
 171
 172         if ( producer != NULL )
 173                 properties = MLT_PRODUCER_PROPERTIES( producer );
 174
 175         // Attach filters if we have a producer and it isn't already westley'd :-)
 176         if ( producer != NULL && mlt_properties_get( properties, "westley" ) == NULL && \
 177                 mlt_properties_get( properties, "_westley" ) == NULL && \
 178                 mlt_properties_get( properties, "fezzik_normalised" ) == NULL )
 179                 attach_normalisers( profile, producer );
 180
 181         // Now make sure we don't lose our identity
 182         if ( properties != NULL )
 183                 mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
 184
 185         // Return the producer
 186         return producer;
 187 }