2 * repository.c -- provides a map between service and shared objects
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
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.
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.
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
21 #include "mlt_repository.h"
22 #include "mlt_properties.h"
29 struct mlt_repository_s
31 struct mlt_properties_s parent;
34 static char *construct_full_file( char *output, const char *prefix, const char *file )
36 strcpy( output, prefix );
37 if ( prefix[ strlen( prefix ) - 1 ] != '/' )
38 strcat( output, "/" );
39 strcat( output, file );
43 static char *chomp( char *input )
45 if ( input[ strlen( input ) - 1 ] == '\n' )
46 input[ strlen( input ) - 1 ] = '\0';
50 static mlt_properties construct_object( const char *prefix, const char *id )
52 mlt_properties output = mlt_properties_new( );
53 mlt_properties_set( output, "prefix", prefix );
54 mlt_properties_set( output, "id", id );
58 static mlt_properties construct_service( mlt_properties object, const char *id )
60 mlt_properties output = mlt_properties_new( );
61 mlt_properties_set_data( output, "object", object, 0, NULL, NULL );
62 mlt_properties_set( output, "id", id );
66 static void *construct_instance( mlt_properties service_properties, const char *symbol, void *input )
68 // Extract the service
69 char *service = mlt_properties_get( service_properties, "id" );
71 // Get the object properties
72 void *object_properties = mlt_properties_get_data( service_properties, "object", NULL );
74 // Get the dlopen'd object
75 void *object = mlt_properties_get_data( object_properties, "dlopen", NULL );
77 // Get the dlsym'd symbol
78 void *( *symbol_ptr )( const char *, void * ) = mlt_properties_get_data( object_properties, symbol, NULL );
80 // Check that we have object and open if we don't
83 char full_file[ 512 ];
85 // Get the prefix and id of the shared object
86 char *prefix = mlt_properties_get( object_properties, "prefix" );
87 char *file = mlt_properties_get( object_properties, "id" );
90 // Very temporary hack to allow the quicktime plugins to work
91 // TODO: extend repository to allow this to be used on a case by case basis
92 if ( !strcmp( service, "kino" ) )
95 // Construct the full file
96 construct_full_file( full_file, prefix, file );
98 // Open the shared object
99 object = dlopen( full_file, flags );
100 if ( object != NULL )
102 // Set it on the properties
103 mlt_properties_set_data( object_properties, "dlopen", object, 0, ( mlt_destructor )dlclose, NULL );
107 fprintf( stderr, "Failed to load plugin: %s\n", dlerror() );
111 // Now check if we have this symbol pointer
112 if ( object != NULL && symbol_ptr == NULL )
115 symbol_ptr = dlsym( object, symbol );
117 // Set it on the properties
118 mlt_properties_set_data( object_properties, "dlsym", symbol_ptr, 0, NULL, NULL );
121 // Construct the service
122 return symbol_ptr != NULL ? symbol_ptr( service, input ) : NULL;
125 mlt_repository mlt_repository_init( mlt_properties object_list, const char *prefix, const char *data, const char *symbol )
127 char full_file[ 512 ];
130 // Construct the repository
131 mlt_repository this = calloc( sizeof( struct mlt_repository_s ), 1 );
132 mlt_properties_init( &this->parent, this );
134 // Add the symbol to THIS repository properties.
135 mlt_properties_set( &this->parent, "_symbol", symbol );
137 // Construct full file
138 construct_full_file( full_file, prefix, data );
139 strcat( full_file, ".dat" );
142 file = fopen( full_file, "r" );
144 // Parse the contents
151 while( fgets( full, 512, file ) )
155 if ( full[ 0 ] != '#' && full[ 0 ] != '\0' && sscanf( full, "%s %s", service, object ) == 2 )
157 // Get the object properties first
158 mlt_properties object_properties = mlt_properties_get_data( object_list, object, NULL );
160 // If their are no properties, create them now
161 if ( object_properties == NULL )
163 // Construct the object
164 object_properties = construct_object( prefix, object );
166 // Add it to the object list
167 mlt_properties_set_data( object_list, object, object_properties, 0, ( mlt_destructor )mlt_properties_close, NULL );
170 // Now construct a property for the service
171 mlt_properties service_properties = construct_service( object_properties, service );
173 // Add it to the repository
174 mlt_properties_set_data( &this->parent, service, service_properties, 0, ( mlt_destructor )mlt_properties_close, NULL );
185 void *mlt_repository_fetch( mlt_repository this, const char *service, void *input )
187 // Get the service properties
188 mlt_properties service_properties = mlt_properties_get_data( &this->parent, service, NULL );
190 // If the service exists
191 if ( service_properties != NULL )
193 // Get the symbol that is used to generate this service
194 char *symbol = mlt_properties_get( &this->parent, "_symbol" );
196 // Now get an instance of the service
197 return construct_instance( service_properties, symbol, input );
203 void mlt_repository_close( mlt_repository this )
205 mlt_properties_close( &this->parent );