2 * mlt_properties.c -- base properties class
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
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.
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.
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.
22 #include "mlt_properties.h"
23 #include "mlt_property.h"
29 /* ---------------- // Private Implementation // ---------------- */
31 /** Private implementation of the property list.
43 /** Basic implementation.
46 int mlt_properties_init( mlt_properties this, void *child )
49 memset( this, 0, sizeof( struct mlt_properties_s ) );
51 // Assign the child of the object
54 // Allocate the private structure
55 this->private = calloc( sizeof( property_list ), 1 );
57 return this->private == NULL;
60 /** Constructor for stand alone object.
63 mlt_properties mlt_properties_new( )
65 // Construct a standalone properties object
66 mlt_properties this = calloc( sizeof( struct mlt_properties_s ), 1 );
69 mlt_properties_init( this, NULL );
75 /** Special case - when a container (such as fezzik) is protecting another
76 producer, we need to ensure that properties are passed through to the
80 static void mlt_properties_do_mirror( mlt_properties this, char *name )
82 if ( strcmp( name, "in" ) && strcmp( name, "out" ) )
84 mlt_properties mirror = mlt_properties_get_data( this, "mlt_mirror", NULL );
87 char *value = mlt_properties_get( this, name );
89 mlt_properties_set( mirror, name, value );
94 /** Allow the specification of a mirror.
97 void mlt_properties_mirror( mlt_properties this, mlt_properties that )
99 mlt_properties_set_data( this, "mlt_mirror", that, 0, NULL, NULL );
102 /** Inherit all serialisable properties from that into this.
105 int mlt_properties_inherit( mlt_properties this, mlt_properties that )
107 int count = mlt_properties_count( that );
110 char *value = mlt_properties_get_value( that, count );
113 char *name = mlt_properties_get_name( that, count );
114 mlt_properties_set( this, name, value );
120 /** Locate a property by name
123 static mlt_property mlt_properties_find( mlt_properties this, char *name )
125 mlt_property value = NULL;
126 property_list *list = this->private;
130 for ( i = 0; value == NULL && i < list->count; i ++ )
131 if ( !strcmp( list->name[ i ], name ) )
132 value = list->value[ i ];
137 /** Add a new property.
140 static mlt_property mlt_properties_add( mlt_properties this, char *name )
142 property_list *list = this->private;
144 // Check that we have space and resize if necessary
145 if ( list->count == list->size )
148 list->name = realloc( list->name, list->size * sizeof( char * ) );
149 list->value = realloc( list->value, list->size * sizeof( mlt_property ) );
152 // Assign name/value pair
153 list->name[ list->count ] = strdup( name );
154 list->value[ list->count ] = mlt_property_init( );
156 // Return and increment count accordingly
157 return list->value[ list->count ++ ];
160 /** Fetch a property by name - this includes add if not found.
163 static mlt_property mlt_properties_fetch( mlt_properties this, char *name )
165 // Try to find an existing property first
166 mlt_property property = mlt_properties_find( this, name );
168 // If it wasn't found, create one
169 if ( property == NULL )
170 property = mlt_properties_add( this, name );
172 // Return the property
176 /** Set the property.
179 int mlt_properties_set( mlt_properties this, char *name, char *value )
183 // Fetch the property to work with
184 mlt_property property = mlt_properties_fetch( this, name );
186 // Set it if not NULL
187 if ( property != NULL )
189 error = mlt_property_set_string( property, value );
190 mlt_properties_do_mirror( this, name );
196 /** Get a string value by name.
199 char *mlt_properties_get( mlt_properties this, char *name )
201 mlt_property value = mlt_properties_find( this, name );
202 return value == NULL ? NULL : mlt_property_get_string( value );
205 /** Get a name by index.
208 char *mlt_properties_get_name( mlt_properties this, int index )
210 property_list *list = this->private;
211 if ( index >= 0 && index < list->count )
212 return list->name[ index ];
216 /** Get a string value by index.
219 char *mlt_properties_get_value( mlt_properties this, int index )
221 property_list *list = this->private;
222 if ( index >= 0 && index < list->count )
223 return mlt_property_get_string( list->value[ index ] );
227 /** Return the number of items in the list.
230 int mlt_properties_count( mlt_properties this )
232 property_list *list = this->private;
236 /** Set a value by parsing a name=value string
239 int mlt_properties_parse( mlt_properties this, char *namevalue )
241 char *name = strdup( namevalue );
242 char *value = strdup( namevalue );
245 if ( strchr( name, '=' ) )
247 *( strchr( name, '=' ) ) = '\0';
248 strcpy( value, strchr( value, '=' ) + 1 );
255 error = mlt_properties_set( this, name, value );
263 /** Get a value associated to the name.
266 int mlt_properties_get_int( mlt_properties this, char *name )
268 mlt_property value = mlt_properties_find( this, name );
269 return value == NULL ? 0 : mlt_property_get_int( value );
272 /** Set a value associated to the name.
275 int mlt_properties_set_int( mlt_properties this, char *name, int value )
279 // Fetch the property to work with
280 mlt_property property = mlt_properties_fetch( this, name );
282 // Set it if not NULL
283 if ( property != NULL )
285 error = mlt_property_set_int( property, value );
286 mlt_properties_do_mirror( this, name );
292 /** Get a value associated to the name.
295 double mlt_properties_get_double( mlt_properties this, char *name )
297 mlt_property value = mlt_properties_find( this, name );
298 return value == NULL ? 0 : mlt_property_get_double( value );
301 /** Set a value associated to the name.
304 int mlt_properties_set_double( mlt_properties this, char *name, double value )
308 // Fetch the property to work with
309 mlt_property property = mlt_properties_fetch( this, name );
311 // Set it if not NULL
312 if ( property != NULL )
314 error = mlt_property_set_double( property, value );
315 mlt_properties_do_mirror( this, name );
321 /** Get a value associated to the name.
324 mlt_position mlt_properties_get_position( mlt_properties this, char *name )
326 mlt_property value = mlt_properties_find( this, name );
327 return value == NULL ? 0 : mlt_property_get_position( value );
330 /** Set a value associated to the name.
333 int mlt_properties_set_position( mlt_properties this, char *name, mlt_position value )
337 // Fetch the property to work with
338 mlt_property property = mlt_properties_fetch( this, name );
340 // Set it if not NULL
341 if ( property != NULL )
343 error = mlt_property_set_position( property, value );
344 mlt_properties_do_mirror( this, name );
350 /** Get a value associated to the name.
353 void *mlt_properties_get_data( mlt_properties this, char *name, int *length )
355 mlt_property value = mlt_properties_find( this, name );
356 return value == NULL ? NULL : mlt_property_get_data( value, length );
359 /** Set a value associated to the name.
362 int mlt_properties_set_data( mlt_properties this, char *name, void *value, int length, mlt_destructor destroy, mlt_serialiser serialise )
366 // Fetch the property to work with
367 mlt_property property = mlt_properties_fetch( this, name );
369 // Set it if not NULL
370 if ( property != NULL )
371 error = mlt_property_set_data( property, value, length, destroy, serialise );
379 void mlt_properties_close( mlt_properties this )
381 property_list *list = this->private;
384 // Clean up names and values
385 for ( index = list->count - 1; index >= 0; index -- )
387 free( list->name[ index ] );
388 mlt_property_close( list->value[ index ] );
396 // Free this now if this has no child
397 if ( this->child == NULL )