2 * \file mlt_properties.c
3 * \brief Properties class definition
4 * \see mlt_properties_s
6 * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
7 * \author Charles Yates <charles.yates@pandora.be>
8 * \author Dan Dennedy <dan@dennedy.org>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "mlt_properties.h"
26 #include "mlt_property.h"
27 #include "mlt_deque.h"
29 #include "mlt_factory.h"
37 #include <sys/types.h>
43 #define PRESETS_DIR "/presets"
45 /** \brief private implementation of the property list */
54 mlt_properties mirror;
56 pthread_mutex_t mutex;
61 /* Memory leak checks */
63 //#define _MLT_PROPERTY_CHECKS_ 2
64 #ifdef _MLT_PROPERTY_CHECKS_
65 static int properties_created = 0;
66 static int properties_destroyed = 0;
69 /** Initialize a properties object that was already allocated.
71 * This does allocate its ::property_list, and it adds a reference count.
72 * \public \memberof mlt_properties_s
73 * \param self the properties structure to initialize
74 * \param child an opaque pointer to a subclass object
75 * \return true if failed
78 int mlt_properties_init( mlt_properties self, void *child )
82 #ifdef _MLT_PROPERTY_CHECKS_
83 // Increment number of properties created
84 properties_created ++;
88 memset( self, 0, sizeof( struct mlt_properties_s ) );
90 // Assign the child of the object
93 // Allocate the local structure
94 self->local = calloc( 1, sizeof( property_list ) );
96 // Increment the ref count
97 ( ( property_list * )self->local )->ref_count = 1;
98 pthread_mutex_init( &( ( property_list * )self->local )->mutex, NULL );;
101 // Check that initialisation was successful
102 return self != NULL && self->local == NULL;
105 /** Create a properties object.
107 * This allocates the properties structure and calls mlt_properties_init() on it.
108 * Free the properties object with mlt_properties_close().
109 * \public \memberof mlt_properties_s
110 * \return a new properties object
113 mlt_properties mlt_properties_new( )
115 // Construct a standalone properties object
116 mlt_properties self = calloc( 1, sizeof( struct mlt_properties_s ) );
119 mlt_properties_init( self, NULL );
121 // Return the pointer
125 /** Set the numeric locale used for string/double conversions.
127 * \public \memberof mlt_properties_s
128 * \param self a properties list
129 * \param locale the locale name
130 * \return true if error
133 int mlt_properties_set_lcnumeric( mlt_properties self, const char *locale )
137 if ( self && locale )
139 property_list *list = self->local;
141 #if defined(__linux__) || defined(__DARWIN__)
143 freelocale( list->locale );
144 list->locale = newlocale( LC_NUMERIC_MASK, locale, NULL );
146 error = list->locale == NULL;
154 /** Get the numeric locale for this properties object.
156 * Do not free the result.
157 * \public \memberof mlt_properties_s
158 * \param self a properties list
159 * \return the locale name if this properties has a specific locale it is using, NULL otherwise
162 const char* mlt_properties_get_lcnumeric( mlt_properties self )
164 property_list *list = self->local;
165 const char *result = NULL;
169 #if defined(__DARWIN__)
170 result = querylocale( LC_NUMERIC, list->locale );
171 #elif defined(__linux__)
172 result = list->locale->__names[ LC_NUMERIC ];
174 // TODO: not yet sure what to do on other platforms
180 static int load_properties( mlt_properties self, const char *filename )
183 FILE *file = fopen( filename, "r" );
185 // Load contents of file
190 char last[ 1024 ] = "";
192 // Read each string from the file
193 while( fgets( temp, 1024, file ) )
196 temp[ strlen( temp ) - 1 ] = '\0';
198 // Check if the line starts with a .
199 if ( temp[ 0 ] == '.' )
202 sprintf( temp2, "%s%s", last, temp );
203 strcpy( temp, temp2 );
205 else if ( strchr( temp, '=' ) )
207 strcpy( last, temp );
208 *( strchr( last, '=' ) ) = '\0';
211 // Parse and set the property
212 if ( strcmp( temp, "" ) && temp[ 0 ] != '#' )
213 mlt_properties_parse( self, temp );
219 return file? 0 : errno;
222 /** Create a properties object by reading a .properties text file.
224 * Free the properties object with mlt_properties_close().
225 * \deprecated Please start using mlt_properties_parse_yaml().
226 * \public \memberof mlt_properties_s
227 * \param filename the absolute file name
228 * \return a new properties object
231 mlt_properties mlt_properties_load( const char *filename )
233 // Construct a standalone properties object
234 mlt_properties self = mlt_properties_new( );
237 load_properties( self, filename );
239 // Return the pointer
243 /** Set properties from a preset.
245 * Presets are typically installed to $prefix/share/mlt/presets/{type}/{service}/[{profile}/]{name}.
246 * For example, "/usr/share/mlt/presets/consumer/avformat/dv_ntsc_wide/DVD"
247 * could be an encoding preset for a widescreen NTSC DVD Video.
248 * Do not specify the type and service in the preset name parameter; these are
249 * inferred automatically from the service to which you are applying the preset.
250 * Using the example above and assuming you are calling this function on the
251 * avformat consumer, the name passed to the function should simply be DVD.
252 * Note that the profile portion of the path is optional, but a profile-specific
253 * preset with the same name as a more generic one is given a higher priority.
254 * \todo Look in a user-specific location - somewhere in the home directory.
256 * \public \memberof mlt_properties_s
257 * \param self a properties list
258 * \param name the name of a preset in a well-known location or the explicit path
259 * \return true if error
262 int mlt_properties_preset( mlt_properties self, const char *name )
264 struct stat stat_buff;
267 if ( !( self && name && strlen( name ) ) )
270 // See if name is an explicit file
271 if ( ! stat( name, &stat_buff ) )
273 return load_properties( self, name );
277 // Look for profile-specific preset before a generic one.
278 char *data = getenv( "MLT_PRESETS_PATH" );
279 const char *type = mlt_properties_get( self, "mlt_type" );
280 const char *service = mlt_properties_get( self, "mlt_service" );
281 const char *profile = mlt_environment( "MLT_PROFILE" );
286 data = strdup( data );
290 data = malloc( strlen( mlt_environment( "MLT_DATA" ) ) + strlen( PRESETS_DIR ) + 1 );
291 strcpy( data, mlt_environment( "MLT_DATA" ) );
292 strcat( data, PRESETS_DIR );
294 if ( data && type && service )
296 char *path = malloc( 5 + strlen(name) + strlen(data) + strlen(type) + strlen(service) + ( profile? strlen(profile) : 0 ) );
297 sprintf( path, "%s/%s/%s/%s/%s", data, type, service, profile, name );
298 if ( load_properties( self, path ) )
300 sprintf( path, "%s/%s/%s/%s", data, type, service, name );
301 error = load_properties( self, path );
314 /** Generate a hash key.
316 * \private \memberof mlt_properties_s
317 * \param name a string
321 static inline int generate_hash( const char *name )
326 hash = ( hash + ( i ++ * ( *name ++ & 31 ) ) ) % 199;
330 /** Copy a serializable property to a properties list that is mirroring this one.
332 * Special case - when a container (such as loader) is protecting another
333 * producer, we need to ensure that properties are passed through to the
335 * \private \memberof mlt_properties_s
336 * \param self a properties list
337 * \param name the name of the property to copy
340 static inline void mlt_properties_do_mirror( mlt_properties self, const char *name )
342 property_list *list = self->local;
343 if ( list->mirror != NULL )
345 char *value = mlt_properties_get( self, name );
347 mlt_properties_set( list->mirror, name, value );
351 /** Increment the reference count.
353 * \public \memberof mlt_properties_s
354 * \param self a properties list
355 * \return the new reference count
358 int mlt_properties_inc_ref( mlt_properties self )
363 property_list *list = self->local;
364 pthread_mutex_lock( &list->mutex );
365 result = ++ list->ref_count;
366 pthread_mutex_unlock( &list->mutex );
371 /** Decrement the reference count.
373 * \public \memberof mlt_properties_s
374 * \param self a properties list
375 * \return the new reference count
378 int mlt_properties_dec_ref( mlt_properties self )
383 property_list *list = self->local;
384 pthread_mutex_lock( &list->mutex );
385 result = -- list->ref_count;
386 pthread_mutex_unlock( &list->mutex );
391 /** Get the reference count.
393 * \public \memberof mlt_properties_s
394 * \param self a properties list
395 * \return the current reference count
398 int mlt_properties_ref_count( mlt_properties self )
402 property_list *list = self->local;
403 return list->ref_count;
408 /** Set a properties list to be a mirror copy of another.
410 * Note that this does not copy all existing properties. Rather, you must
411 * call this before setting the properties that you wish to copy.
412 * \public \memberof mlt_properties_s
413 * \param that the properties which will receive copies of the properties as they are set.
414 * \param self the properties to mirror
417 void mlt_properties_mirror( mlt_properties self, mlt_properties that )
419 property_list *list = self->local;
423 /** Copy all serializable properties to another properties list.
425 * \public \memberof mlt_properties_s
426 * \param self The properties to copy to
427 * \param that The properties to copy from
431 int mlt_properties_inherit( mlt_properties self, mlt_properties that )
433 int count = mlt_properties_count( that );
435 for ( i = 0; i < count; i ++ )
437 char *value = mlt_properties_get_value( that, i );
440 char *name = mlt_properties_get_name( that, i );
441 mlt_properties_set( self, name, value );
447 /** Pass all serializable properties that match a prefix to another properties object
449 * \public \memberof mlt_properties_s
450 * \param self the properties to copy to
451 * \param that The properties to copy from
452 * \param prefix the property names to match (required)
456 int mlt_properties_pass( mlt_properties self, mlt_properties that, const char *prefix )
458 int count = mlt_properties_count( that );
459 int length = strlen( prefix );
461 for ( i = 0; i < count; i ++ )
463 char *name = mlt_properties_get_name( that, i );
464 if ( !strncmp( name, prefix, length ) )
466 char *value = mlt_properties_get_value( that, i );
468 mlt_properties_set( self, name + length, value );
474 /** Locate a property by name.
476 * \private \memberof mlt_properties_s
477 * \param self a properties list
478 * \param name the property to lookup by name
479 * \return the property or NULL for failure
482 static inline mlt_property mlt_properties_find( mlt_properties self, const char *name )
484 property_list *list = self->local;
485 mlt_property value = NULL;
486 int key = generate_hash( name );
488 mlt_properties_lock( self );
490 int i = list->hash[ key ] - 1;
493 // Check if we're hashed
494 if ( list->count > 0 &&
495 name[ 0 ] == list->name[ i ][ 0 ] &&
496 !strcmp( list->name[ i ], name ) )
497 value = list->value[ i ];
500 for ( i = list->count - 1; value == NULL && i >= 0; i -- )
501 if ( name[ 0 ] == list->name[ i ][ 0 ] && !strcmp( list->name[ i ], name ) )
502 value = list->value[ i ];
504 mlt_properties_unlock( self );
509 /** Add a new property.
511 * \private \memberof mlt_properties_s
512 * \param self a properties list
513 * \param name the name of the new property
514 * \return the new property
517 static mlt_property mlt_properties_add( mlt_properties self, const char *name )
519 property_list *list = self->local;
520 int key = generate_hash( name );
523 mlt_properties_lock( self );
525 // Check that we have space and resize if necessary
526 if ( list->count == list->size )
529 list->name = realloc( list->name, list->size * sizeof( const char * ) );
530 list->value = realloc( list->value, list->size * sizeof( mlt_property ) );
533 // Assign name/value pair
534 list->name[ list->count ] = strdup( name );
535 list->value[ list->count ] = mlt_property_init( );
537 // Assign to hash table
538 if ( list->hash[ key ] == 0 )
539 list->hash[ key ] = list->count + 1;
541 // Return and increment count accordingly
542 result = list->value[ list->count ++ ];
544 mlt_properties_unlock( self );
549 /** Fetch a property by name and add one if not found.
551 * \private \memberof mlt_properties_s
552 * \param self a properties list
553 * \param name the property to lookup or add
554 * \return the property
557 static mlt_property mlt_properties_fetch( mlt_properties self, const char *name )
559 // Try to find an existing property first
560 mlt_property property = mlt_properties_find( self, name );
562 // If it wasn't found, create one
563 if ( property == NULL )
564 property = mlt_properties_add( self, name );
566 // Return the property
570 /** Copy a property to another properties list.
572 * \public \memberof mlt_properties_s
573 * \author Zach <zachary.drew@gmail.com>
574 * \param self the properties to copy to
575 * \param that the properties to copy from
576 * \param name the name of the property to copy
579 void mlt_properties_pass_property( mlt_properties self, mlt_properties that, const char *name )
581 // Make sure the source property isn't null.
582 mlt_property that_prop = mlt_properties_find( that, name );
583 if( that_prop == NULL )
586 mlt_property_pass( mlt_properties_fetch( self, name ), that_prop );
589 /** Copy all properties specified in a comma-separated list to another properties list.
591 * White space is also a delimiter.
592 * \public \memberof mlt_properties_s
593 * \author Zach <zachary.drew@gmail.com>
594 * \param self the properties to copy to
595 * \param that the properties to copy from
596 * \param list a delimited list of property names
601 int mlt_properties_pass_list( mlt_properties self, mlt_properties that, const char *list )
603 char *props = strdup( list );
605 const char *delim = " ,\t\n"; // Any combination of spaces, commas, tabs, and newlines
610 count = strcspn( ptr, delim );
612 if( ptr[count] == '\0' )
615 ptr[count] = '\0'; // Make it a real string
617 mlt_properties_pass_property( self, that, ptr );
621 ptr += strspn( ptr, delim );
630 /** Set a property to a string.
632 * The property name "properties" is reserved to load the preset in \p value.
633 * When the value begins with '@' then it is interpreted as a very simple math
634 * expression containing only the +, -, *, and / operators.
635 * The event "property-changed" is fired after the property has been set.
637 * This makes a copy of the string value you supply.
638 * \public \memberof mlt_properties_s
639 * \param self a properties list
640 * \param name the property to set
641 * \param value the property's new value
642 * \return true if error
645 int mlt_properties_set( mlt_properties self, const char *name, const char *value )
649 // Fetch the property to work with
650 mlt_property property = mlt_properties_fetch( self, name );
652 // Set it if not NULL
653 if ( property == NULL )
655 mlt_log( NULL, MLT_LOG_FATAL, "Whoops - %s not found (should never occur)\n", name );
657 else if ( value == NULL )
659 error = mlt_property_set_string( property, value );
660 mlt_properties_do_mirror( self, name );
662 else if ( *value != '@' )
664 error = mlt_property_set_string( property, value );
665 mlt_properties_do_mirror( self, name );
666 if ( !strcmp( name, "properties" ) )
667 mlt_properties_preset( self, value );
669 else if ( value[ 0 ] == '@' )
678 while ( *value != '\0' )
680 int length = strcspn( value, "+-*/" );
682 // Get the identifier
683 strncpy( id, value, length );
687 // Determine the value
688 if ( isdigit( id[ 0 ] ) )
689 current = atof( id );
691 current = mlt_properties_get_double( self, id );
693 // Apply the operation
706 total = total / current;
711 op = *value != '\0' ? *value ++ : ' ';
714 error = mlt_property_set_double( property, total );
715 mlt_properties_do_mirror( self, name );
718 mlt_events_fire( self, "property-changed", name, NULL );
723 /** Set or default a property to a string.
725 * This makes a copy of the string value you supply.
726 * \public \memberof mlt_properties_s
727 * \param self a properties list
728 * \param name the property to set
729 * \param value the string value to set or NULL to use the default
730 * \param def the default string if value is NULL
731 * \return true if error
734 int mlt_properties_set_or_default( mlt_properties self, const char *name, const char *value, const char *def )
736 return mlt_properties_set( self, name, value == NULL ? def : value );
739 /** Get a string value by name.
741 * Do not free the returned string. It's lifetime is controlled by the property
742 * and this properties object.
743 * \public \memberof mlt_properties_s
744 * \param self a properties list
745 * \param name the property to get
746 * \return the property's string value or NULL if it does not exist
749 char *mlt_properties_get( mlt_properties self, const char *name )
751 mlt_property value = mlt_properties_find( self, name );
752 property_list *list = self->local;
753 return value == NULL ? NULL : mlt_property_get_string_l( value, list->locale );
756 /** Get a property name by index.
758 * Do not free the returned string.
759 * \public \memberof mlt_properties_s
760 * \param self a properties list
761 * \param index the numeric index of the property
762 * \return the name of the property or NULL if index is out of range
765 char *mlt_properties_get_name( mlt_properties self, int index )
767 property_list *list = self->local;
768 if ( index >= 0 && index < list->count )
769 return list->name[ index ];
773 /** Get a property's string value by index.
775 * Do not free the returned string.
776 * \public \memberof mlt_properties_s
777 * \param self a properties list
778 * \param index the numeric index of the property
779 * \return the property value as a string or NULL if the index is out of range
782 char *mlt_properties_get_value( mlt_properties self, int index )
784 property_list *list = self->local;
785 if ( index >= 0 && index < list->count )
786 return mlt_property_get_string_l( list->value[ index ], list->locale );
790 /** Get a data value by index.
792 * Do not free the returned pointer if you supplied a destructor function when you
794 * \public \memberof mlt_properties_s
795 * \param self a properties list
796 * \param index the numeric index of the property
797 * \param[out] size the size of the binary data in bytes or NULL if the index is out of range
800 void *mlt_properties_get_data_at( mlt_properties self, int index, int *size )
802 property_list *list = self->local;
803 if ( index >= 0 && index < list->count )
804 return mlt_property_get_data( list->value[ index ], size );
808 /** Return the number of items in the list.
810 * \public \memberof mlt_properties_s
811 * \param self a properties list
812 * \return the number of property objects
815 int mlt_properties_count( mlt_properties self )
817 property_list *list = self->local;
821 /** Set a value by parsing a name=value string.
823 * \public \memberof mlt_properties_s
824 * \param self a properties list
825 * \param namevalue a string containing name and value delimited by '='
826 * \return true if there was an error
829 int mlt_properties_parse( mlt_properties self, const char *namevalue )
831 char *name = strdup( namevalue );
834 char *ptr = strchr( name, '=' );
842 value = strdup( ptr );
847 value = strdup( ptr );
848 if ( value != NULL && value[ strlen( value ) - 1 ] == '\"' )
849 value[ strlen( value ) - 1 ] = '\0';
854 value = strdup( "" );
857 error = mlt_properties_set( self, name, value );
865 /** Get an integer associated to the name.
867 * \public \memberof mlt_properties_s
868 * \param self a properties list
869 * \param name the property to get
870 * \return The integer value, 0 if not found (which may also be a legitimate value)
873 int mlt_properties_get_int( mlt_properties self, const char *name )
875 mlt_profile profile = mlt_properties_get_data( self, "_profile", NULL );
876 double fps = mlt_profile_fps( profile );
877 property_list *list = self->local;
878 mlt_property value = mlt_properties_find( self, name );
879 return value == NULL ? 0 : mlt_property_get_int( value, fps, list->locale );
882 /** Set a property to an integer value.
884 * \public \memberof mlt_properties_s
885 * \param self a properties list
886 * \param name the property to set
887 * \param value the integer
888 * \return true if error
891 int mlt_properties_set_int( mlt_properties self, const char *name, int value )
895 // Fetch the property to work with
896 mlt_property property = mlt_properties_fetch( self, name );
898 // Set it if not NULL
899 if ( property != NULL )
901 error = mlt_property_set_int( property, value );
902 mlt_properties_do_mirror( self, name );
905 mlt_events_fire( self, "property-changed", name, NULL );
910 /** Get a 64-bit integer associated to the name.
912 * \public \memberof mlt_properties_s
913 * \param self a properties list
914 * \param name the property to get
915 * \return the integer value, 0 if not found (which may also be a legitimate value)
918 int64_t mlt_properties_get_int64( mlt_properties self, const char *name )
920 mlt_property value = mlt_properties_find( self, name );
921 return value == NULL ? 0 : mlt_property_get_int64( value );
924 /** Set a property to a 64-bit integer value.
926 * \public \memberof mlt_properties_s
927 * \param self a properties list
928 * \param name the property to set
929 * \param value the integer
930 * \return true if error
933 int mlt_properties_set_int64( mlt_properties self, const char *name, int64_t value )
937 // Fetch the property to work with
938 mlt_property property = mlt_properties_fetch( self, name );
940 // Set it if not NULL
941 if ( property != NULL )
943 error = mlt_property_set_int64( property, value );
944 mlt_properties_do_mirror( self, name );
947 mlt_events_fire( self, "property-changed", name, NULL );
952 /** Get a floating point value associated to the name.
954 * \public \memberof mlt_properties_s
955 * \param self a properties list
956 * \param name the property to get
957 * \return the floating point, 0 if not found (which may also be a legitimate value)
960 double mlt_properties_get_double( mlt_properties self, const char *name )
962 mlt_profile profile = mlt_properties_get_data( self, "_profile", NULL );
963 double fps = mlt_profile_fps( profile );
964 mlt_property value = mlt_properties_find( self, name );
965 property_list *list = self->local;
966 return value == NULL ? 0 : mlt_property_get_double( value, fps, list->locale );
969 /** Set a property to a floating point value.
971 * \public \memberof mlt_properties_s
972 * \param self a properties list
973 * \param name the property to set
974 * \param value the floating point value
975 * \return true if error
978 int mlt_properties_set_double( mlt_properties self, const char *name, double value )
982 // Fetch the property to work with
983 mlt_property property = mlt_properties_fetch( self, name );
985 // Set it if not NULL
986 if ( property != NULL )
988 error = mlt_property_set_double( property, value );
989 mlt_properties_do_mirror( self, name );
992 mlt_events_fire( self, "property-changed", name, NULL );
997 /** Get a position value associated to the name.
999 * \public \memberof mlt_properties_s
1000 * \param self a properties list
1001 * \param name the property to get
1002 * \return the position, 0 if not found (which may also be a legitimate value)
1005 mlt_position mlt_properties_get_position( mlt_properties self, const char *name )
1007 mlt_profile profile = mlt_properties_get_data( self, "_profile", NULL );
1008 double fps = mlt_profile_fps( profile );
1009 property_list *list = self->local;
1010 mlt_property value = mlt_properties_find( self, name );
1011 return value == NULL ? 0 : mlt_property_get_position( value, fps, list->locale );
1014 /** Set a property to a position value.
1016 * \public \memberof mlt_properties_s
1017 * \param self a properties list
1018 * \param name the property to get
1019 * \param value the position
1020 * \return true if error
1023 int mlt_properties_set_position( mlt_properties self, const char *name, mlt_position value )
1027 // Fetch the property to work with
1028 mlt_property property = mlt_properties_fetch( self, name );
1030 // Set it if not NULL
1031 if ( property != NULL )
1033 error = mlt_property_set_position( property, value );
1034 mlt_properties_do_mirror( self, name );
1037 mlt_events_fire( self, "property-changed", name, NULL );
1042 /** Get a binary data value associated to the name.
1044 * Do not free the returned pointer if you supplied a destructor function
1045 * when you set this property.
1046 * \public \memberof mlt_properties_s
1047 * \param self a properties list
1048 * \param name the property to get
1049 * \param[out] length The size of the binary data in bytes, if available (often it is not, you should know)
1052 void *mlt_properties_get_data( mlt_properties self, const char *name, int *length )
1054 mlt_property value = mlt_properties_find( self, name );
1055 return value == NULL ? NULL : mlt_property_get_data( value, length );
1058 /** Store binary data as a property.
1060 * \public \memberof mlt_properties_s
1061 * \param self a properties list
1062 * \param name the property to set
1063 * \param value an opaque pointer to binary data
1064 * \param length the size of the binary data in bytes (optional)
1065 * \param destroy a function to deallocate the binary data when the property is closed (optional)
1066 * \param serialise a function that can serialize the binary data as text (optional)
1067 * \return true if error
1070 int mlt_properties_set_data( mlt_properties self, const char *name, void *value, int length, mlt_destructor destroy, mlt_serialiser serialise )
1074 // Fetch the property to work with
1075 mlt_property property = mlt_properties_fetch( self, name );
1077 // Set it if not NULL
1078 if ( property != NULL )
1079 error = mlt_property_set_data( property, value, length, destroy, serialise );
1081 mlt_events_fire( self, "property-changed", name, NULL );
1086 /** Rename a property.
1088 * \public \memberof mlt_properties_s
1089 * \param self a properties list
1090 * \param source the property to rename
1091 * \param dest the new name
1092 * \return true if the name is already in use
1095 int mlt_properties_rename( mlt_properties self, const char *source, const char *dest )
1097 mlt_property value = mlt_properties_find( self, dest );
1099 if ( value == NULL )
1101 property_list *list = self->local;
1105 mlt_properties_lock( self );
1106 for ( i = 0; i < list->count; i ++ )
1108 if ( !strcmp( list->name[ i ], source ) )
1110 free( list->name[ i ] );
1111 list->name[ i ] = strdup( dest );
1112 list->hash[ generate_hash( dest ) ] = i + 1;
1116 mlt_properties_unlock( self );
1119 return value != NULL;
1122 /** Dump the properties to a file handle.
1124 * \public \memberof mlt_properties_s
1125 * \param self a properties list
1126 * \param output a file handle
1129 void mlt_properties_dump( mlt_properties self, FILE *output )
1131 property_list *list = self->local;
1133 for ( i = 0; i < list->count; i ++ )
1134 if ( mlt_properties_get( self, list->name[ i ] ) != NULL )
1135 fprintf( output, "%s=%s\n", list->name[ i ], mlt_properties_get( self, list->name[ i ] ) );
1138 /** Output the properties to a file handle.
1140 * This version includes reference counts and does not put each property on a new line.
1141 * \public \memberof mlt_properties_s
1142 * \param self a properties pointer
1143 * \param title a string to preface the output
1144 * \param output a file handle
1146 void mlt_properties_debug( mlt_properties self, const char *title, FILE *output )
1148 if ( output == NULL ) output = stderr;
1149 fprintf( output, "%s: ", title );
1152 property_list *list = self->local;
1154 fprintf( output, "[ ref=%d", list->ref_count );
1155 for ( i = 0; i < list->count; i ++ )
1156 if ( mlt_properties_get( self, list->name[ i ] ) != NULL )
1157 fprintf( output, ", %s=%s", list->name[ i ], mlt_properties_get( self, list->name[ i ] ) );
1159 fprintf( output, ", %s=%p", list->name[ i ], mlt_properties_get_data( self, list->name[ i ], NULL ) );
1160 fprintf( output, " ]" );
1162 fprintf( output, "\n" );
1165 /** Save the properties to a file by name.
1167 * This uses the dump format - one line per property.
1168 * \public \memberof mlt_properties_s
1169 * \param self a properties list
1170 * \param filename the name of a file to create or overwrite
1171 * \return true if there was an error
1174 int mlt_properties_save( mlt_properties self, const char *filename )
1177 FILE *f = fopen( filename, "w" );
1180 mlt_properties_dump( self, f );
1187 /* This is a very basic cross platform fnmatch replacement - it will fail in
1188 * many cases, but for the basic *.XXX and YYY*.XXX, it will work ok.
1191 /** Test whether a filename or pathname matches a shell-style pattern.
1193 * \private \memberof mlt_properties_s
1194 * \param wild a string containing a wildcard pattern
1195 * \param file the name of a file to test against
1196 * \return true if the file name matches the wildcard pattern
1199 static int mlt_fnmatch( const char *wild, const char *file )
1204 while( f < strlen( file ) && w < strlen( wild ) )
1206 if ( wild[ w ] == '*' )
1209 if ( w == strlen( wild ) )
1211 while ( f != strlen( file ) && tolower( file[ f ] ) != tolower( wild[ w ] ) )
1214 else if ( wild[ w ] == '?' || tolower( file[ f ] ) == tolower( wild[ w ] ) )
1219 else if ( wild[ 0 ] == '*' )
1229 return strlen( file ) == f && strlen( wild ) == w;
1232 /** Compare the string or serialized value of two properties.
1234 * \private \memberof mlt_properties_s
1235 * \param self a property
1236 * \param that a property
1237 * \return < 0 if \p self less than \p that, 0 if equal, or > 0 if \p self is greater than \p that
1240 static int mlt_compare( const void *self, const void *that )
1242 return strcmp( mlt_property_get_string( *( const mlt_property * )self ), mlt_property_get_string( *( const mlt_property * )that ) );
1245 /** Get the contents of a directory.
1247 * Obtains an optionally sorted list of the files found in a directory with a specific wild card.
1248 * Entries in the list have a numeric name (running from 0 to count - 1). Only values change
1249 * position if sort is enabled. Designed to be posix compatible (linux, os/x, mingw etc).
1250 * \public \memberof mlt_properties_s
1251 * \param self a properties list
1252 * \param dirname the name of the directory
1253 * \param pattern a wildcard pattern to filter the directory listing
1254 * \param sort Do you want to sort the directory listing?
1255 * \return the number of items in the directory listing
1258 int mlt_properties_dir_list( mlt_properties self, const char *dirname, const char *pattern, int sort )
1260 DIR *dir = opendir( dirname );
1265 struct dirent *de = readdir( dir );
1266 char fullname[ 1024 ];
1269 sprintf( key, "%d", mlt_properties_count( self ) );
1270 snprintf( fullname, 1024, "%s/%s", dirname, de->d_name );
1271 if ( pattern == NULL )
1272 mlt_properties_set( self, key, fullname );
1273 else if ( de->d_name[ 0 ] != '.' && mlt_fnmatch( pattern, de->d_name ) )
1274 mlt_properties_set( self, key, fullname );
1275 de = readdir( dir );
1281 if ( sort && mlt_properties_count( self ) )
1283 property_list *list = self->local;
1284 mlt_properties_lock( self );
1285 qsort( list->value, mlt_properties_count( self ), sizeof( mlt_property ), mlt_compare );
1286 mlt_properties_unlock( self );
1289 return mlt_properties_count( self );
1292 /** Close a properties object.
1294 * Deallocates the properties object and everything it contains.
1295 * \public \memberof mlt_properties_s
1296 * \param self a properties object
1299 void mlt_properties_close( mlt_properties self )
1301 if ( self != NULL && mlt_properties_dec_ref( self ) <= 0 )
1303 if ( self->close != NULL )
1305 self->close( self->close_object );
1309 property_list *list = self->local;
1312 #if _MLT_PROPERTY_CHECKS_ == 1
1314 mlt_properties_debug( self, "Closing", stderr );
1317 #ifdef _MLT_PROPERTY_CHECKS_
1318 // Increment destroyed count
1319 properties_destroyed ++;
1321 // Show current stats - these should match when the app is closed
1322 mlt_log( NULL, MLT_LOG_DEBUG, "Created %d, destroyed %d\n", properties_created, properties_destroyed );
1325 // Clean up names and values
1326 for ( index = list->count - 1; index >= 0; index -- )
1328 mlt_property_close( list->value[ index ] );
1329 free( list->name[ index ] );
1332 #if defined(__linux__) || defined(__DARWIN__)
1335 freelocale( list->locale );
1338 // Clear up the list
1339 pthread_mutex_destroy( &list->mutex );
1341 free( list->value );
1344 // Free self now if self has no child
1345 if ( self->child == NULL )
1351 /** Determine if the properties list is really just a sequence or ordered list.
1353 * \public \memberof mlt_properties_s
1354 * \param properties a properties list
1355 * \return true if all of the property names are numeric (a sequence)
1358 int mlt_properties_is_sequence( mlt_properties properties )
1361 int n = mlt_properties_count( properties );
1362 for ( i = 0; i < n; i++ )
1363 if ( ! isdigit( mlt_properties_get_name( properties, i )[0] ) )
1368 /** \brief YAML Tiny Parser context structure
1370 * YAML is a nifty text format popular in the Ruby world as a cleaner,
1371 * less verbose alternative to XML. See this Wikipedia topic for an overview:
1372 * http://en.wikipedia.org/wiki/YAML
1373 * The YAML specification is at:
1375 * YAML::Tiny is a Perl module that specifies a subset of YAML that we are
1376 * using here (for the same reasons):
1377 * http://search.cpan.org/~adamk/YAML-Tiny-1.25/lib/YAML/Tiny.pm
1381 struct yaml_parser_context
1388 unsigned int block_indent;
1391 typedef struct yaml_parser_context *yaml_parser;
1393 /** Remove spaces from the left side of a string.
1395 * \param s the string to trim
1396 * \return the number of characters removed
1399 static unsigned int ltrim( char **s )
1403 int n = strlen( c );
1404 for ( i = 0; i < n && *c == ' '; i++, c++ );
1409 /** Remove spaces from the right side of a string.
1411 * \param s the string to trim
1412 * \return the number of characters removed
1415 static unsigned int rtrim( char *s )
1417 int n = strlen( s );
1419 for ( i = n; i > 0 && s[i - 1] == ' '; --i )
1424 /** Parse a line of YAML Tiny.
1426 * Adds a property if needed.
1427 * \private \memberof yaml_parser_context
1428 * \param context a YAML Tiny Parser context
1429 * \param namevalue a line of YAML Tiny
1430 * \return true if there was an error
1433 static int parse_yaml( yaml_parser context, const char *namevalue )
1435 char *name_ = strdup( namevalue );
1439 char *ptr = strchr( name, ':' );
1440 unsigned int indent = ltrim( &name );
1441 mlt_properties properties = mlt_deque_peek_front( context->stack );
1443 // Ascending one more levels in the tree
1444 if ( indent < context->level )
1447 unsigned int n = ( context->level - indent ) / 2;
1448 for ( i = 0; i < n; i++ )
1449 mlt_deque_pop_front( context->stack );
1450 properties = mlt_deque_peek_front( context->stack );
1451 context->level = indent;
1454 // Descending a level in the tree
1455 else if ( indent > context->level && context->block == 0 )
1457 context->level = indent;
1460 // If there is a colon that is not part of a block
1461 if ( ptr && ( indent == context->level ) )
1463 // Reset block processing
1464 if ( context->block_name )
1466 free( context->block_name );
1467 context->block_name = NULL;
1471 // Terminate the name and setup the value pointer
1475 char *comment = strchr( ptr, '#' );
1481 // Trim leading and trailing spaces from bare value
1485 // No value means a child
1486 if ( strcmp( ptr, "" ) == 0 )
1488 mlt_properties child = mlt_properties_new();
1489 mlt_properties_set_lcnumeric( child, mlt_properties_get_lcnumeric( properties ) );
1490 mlt_properties_set_data( properties, name, child, 0,
1491 ( mlt_destructor )mlt_properties_close, NULL );
1492 mlt_deque_push_front( context->stack, child );
1498 // A dash indicates a sequence item
1499 if ( name[0] == '-' )
1501 mlt_properties child = mlt_properties_new();
1504 mlt_properties_set_lcnumeric( child, mlt_properties_get_lcnumeric( properties ) );
1505 snprintf( key, sizeof(key), "%d", context->index++ );
1506 mlt_properties_set_data( properties, key, child, 0,
1507 ( mlt_destructor )mlt_properties_close, NULL );
1508 mlt_deque_push_front( context->stack, child );
1511 context->level += ltrim( &name ) + 1;
1519 value = strdup( ptr );
1520 if ( value && value[ strlen( value ) - 1 ] == '\"' )
1521 value[ strlen( value ) - 1 ] = 0;
1524 // Value is folded or unfolded block
1525 else if ( *ptr == '|' || *ptr == '>' )
1527 context->block = *ptr;
1528 context->block_name = strdup( name );
1529 context->block_indent = 0;
1530 value = strdup( "" );
1536 value = strdup( ptr );
1540 // A list of scalars
1541 else if ( name[0] == '-' )
1543 // Reset block processing
1544 if ( context->block_name )
1546 free( context->block_name );
1547 context->block_name = NULL;
1553 snprintf( key, sizeof(key), "%d", context->index++ );
1557 char *comment = strchr( ptr, '#' );
1561 // Trim leading and trailing spaces from bare value
1569 value = strdup( ptr );
1570 if ( value && value[ strlen( value ) - 1 ] == '\"' )
1571 value[ strlen( value ) - 1 ] = 0;
1574 // Value is folded or unfolded block
1575 else if ( *ptr == '|' || *ptr == '>' )
1577 context->block = *ptr;
1578 context->block_name = strdup( key );
1579 context->block_indent = 0;
1580 value = strdup( "" );
1586 value = strdup( ptr );
1590 name = name_ = strdup( key );
1594 else if ( context->block == '|' )
1596 if ( context->block_indent == 0 )
1597 context->block_indent = indent;
1598 if ( indent > context->block_indent )
1599 name = &name_[ context->block_indent ];
1601 char *old_value = mlt_properties_get( properties, context->block_name );
1602 value = calloc( 1, strlen( old_value ) + strlen( name ) + 2 );
1603 strcpy( value, old_value );
1604 if ( strcmp( old_value, "" ) )
1605 strcat( value, "\n" );
1606 strcat( value, name );
1607 name = context->block_name;
1611 else if ( context->block == '>' )
1615 char *old_value = mlt_properties_get( properties, context->block_name );
1617 // Blank line (prepended with spaces) is new line
1618 if ( strcmp( name, "" ) == 0 )
1620 value = calloc( 1, strlen( old_value ) + 2 );
1621 strcat( value, old_value );
1622 strcat( value, "\n" );
1624 // Concatenate with space
1627 value = calloc( 1, strlen( old_value ) + strlen( name ) + 2 );
1628 strcat( value, old_value );
1629 if ( strcmp( old_value, "" ) && old_value[ strlen( old_value ) - 1 ] != '\n' )
1630 strcat( value, " " );
1631 strcat( value, name );
1633 name = context->block_name;
1638 value = strdup( "" );
1641 error = mlt_properties_set( properties, name, value );
1643 if ( !strcmp( name, "LC_NUMERIC" ) )
1644 mlt_properties_set_lcnumeric( properties, value );
1652 /** Parse a YAML Tiny file by name.
1654 * \public \memberof mlt_properties_s
1655 * \param filename the name of a text file containing YAML Tiny
1656 * \return a new properties list
1659 mlt_properties mlt_properties_parse_yaml( const char *filename )
1661 // Construct a standalone properties object
1662 mlt_properties self = mlt_properties_new( );
1667 FILE *file = fopen( filename, "r" );
1669 // Load contents of file
1674 char *ptemp = &temp[ 0 ];
1676 // Default to LC_NUMERIC = C
1677 mlt_properties_set_lcnumeric( self, "C" );
1680 yaml_parser context = calloc( 1, sizeof( struct yaml_parser_context ) );
1681 context->stack = mlt_deque_init();
1682 mlt_deque_push_front( context->stack, self );
1684 // Read each string from the file
1685 while( fgets( temp, 1024, file ) )
1687 // Check for end-of-stream
1688 if ( strncmp( ptemp, "...", 3 ) == 0 )
1692 temp[ strlen( temp ) - 1 ] = '\0';
1694 // Skip blank lines, comment lines, and document separator
1695 if ( strcmp( ptemp, "" ) && ptemp[ 0 ] != '#' && strncmp( ptemp, "---", 3 )
1696 && strncmp( ptemp, "%YAML", 5 ) && strncmp( ptemp, "% YAML", 6 ) )
1697 parse_yaml( context, temp );
1702 mlt_deque_close( context->stack );
1703 if ( context->block_name )
1704 free( context->block_name );
1709 // Return the pointer
1714 * YAML Tiny Serializer
1717 /** How many bytes to grow at a time */
1718 #define STRBUF_GROWTH (1024)
1720 /** \brief Private to mlt_properties_s, a self-growing buffer for building strings
1730 typedef struct strbuf_s *strbuf;
1732 /** Create a new string buffer
1734 * \private \memberof strbuf_s
1735 * \return a new string buffer
1738 static strbuf strbuf_new( )
1740 strbuf buffer = calloc( 1, sizeof( struct strbuf_s ) );
1741 buffer->size = STRBUF_GROWTH;
1742 buffer->string = calloc( 1, buffer->size );
1746 /** Destroy a string buffer
1748 * \private \memberof strbuf_s
1749 * \param buffer the string buffer to close
1752 static void strbuf_close( strbuf buffer )
1754 // We do not free buffer->string; strbuf user must save that pointer
1760 /** Format a string into a string buffer
1762 * A variable number of arguments follows the format string - one for each
1764 * \private \memberof strbuf_s
1765 * \param buffer the string buffer to write into
1766 * \param format a string that contains text and formatting instructions
1767 * \return the formatted string
1770 static char *strbuf_printf( strbuf buffer, const char *format, ... )
1772 while ( buffer->string )
1775 va_start( ap, format );
1776 size_t len = strlen( buffer->string );
1777 size_t remain = buffer->size - len - 1;
1778 int need = vsnprintf( buffer->string + len, remain, format, ap );
1780 if ( need > -1 && need < remain )
1782 buffer->string[ len ] = 0;
1783 buffer->size += need + STRBUF_GROWTH;
1784 buffer->string = realloc( buffer->string, buffer->size );
1786 return buffer->string;
1789 /** Indent a line of YAML Tiny.
1791 * \private \memberof strbuf_s
1792 * \param output a string buffer
1793 * \param indent the number of spaces to indent
1796 static inline void indent_yaml( strbuf output, int indent )
1799 for ( j = 0; j < indent; j++ )
1800 strbuf_printf( output, " " );
1803 /** Convert a line string into a YAML block literal.
1805 * \private \memberof strbuf_s
1806 * \param output a string buffer
1807 * \param value the string to format as a block literal
1808 * \param indent the number of spaces to indent
1811 static void output_yaml_block_literal( strbuf output, const char *value, int indent )
1813 char *v = strdup( value );
1815 char *eol = strchr( sol, '\n' );
1819 indent_yaml( output, indent );
1821 strbuf_printf( output, "%s\n", sol );
1823 eol = strchr( sol, '\n' );
1825 indent_yaml( output, indent );
1826 strbuf_printf( output, "%s\n", sol );
1829 /** Recursively serialize a properties list into a string buffer as YAML Tiny.
1831 * \private \memberof mlt_properties_s
1832 * \param self a properties list
1833 * \param output a string buffer to hold the serialized YAML Tiny
1834 * \param indent the number of spaces to indent (for recursion, initialize to 0)
1835 * \param is_parent_sequence Is this properties list really just a sequence (for recursion, initialize to 0)?
1838 static void serialise_yaml( mlt_properties self, strbuf output, int indent, int is_parent_sequence )
1840 property_list *list = self->local;
1843 for ( i = 0; i < list->count; i ++ )
1845 // This implementation assumes that all data elements are property lists.
1846 // Unfortunately, we do not have run time type identification.
1847 mlt_properties child = mlt_property_get_data( list->value[ i ], NULL );
1849 if ( mlt_properties_is_sequence( self ) )
1851 // Ignore hidden/non-serialisable items
1852 if ( list->name[ i ][ 0 ] != '_' )
1854 // Indicate a sequence item
1855 indent_yaml( output, indent );
1856 strbuf_printf( output, "- " );
1858 // If the value can be represented as a string
1859 const char *value = mlt_properties_get( self, list->name[ i ] );
1860 if ( value && strcmp( value, "" ) )
1862 // Determine if this is an unfolded block literal
1863 if ( strchr( value, '\n' ) )
1865 strbuf_printf( output, "|\n" );
1866 output_yaml_block_literal( output, value, indent + strlen( list->name[ i ] ) + strlen( "|" ) );
1870 strbuf_printf( output, "%s\n", value );
1876 serialise_yaml( child, output, indent + 2, 1 );
1880 // Assume this is a normal map-oriented properties list
1881 const char *value = mlt_properties_get( self, list->name[ i ] );
1883 // Ignore hidden/non-serialisable items
1884 // If the value can be represented as a string
1885 if ( list->name[ i ][ 0 ] != '_' && value && strcmp( value, "" ) )
1887 if ( is_parent_sequence == 0 )
1888 indent_yaml( output, indent );
1890 is_parent_sequence = 0;
1892 // Determine if this is an unfolded block literal
1893 if ( strchr( value, '\n' ) )
1895 strbuf_printf( output, "%s: |\n", list->name[ i ] );
1896 output_yaml_block_literal( output, value, indent + strlen( list->name[ i ] ) + strlen( ": " ) );
1900 strbuf_printf( output, "%s: %s\n", list->name[ i ], value );
1904 // Output a child as a map item
1907 indent_yaml( output, indent );
1908 strbuf_printf( output, "%s:\n", list->name[ i ] );
1911 serialise_yaml( child, output, indent + 2, 0 );
1917 /** Serialize a properties list as a string of YAML Tiny.
1919 * The caller MUST free the returned string!
1920 * This operates on properties containing properties as a hierarchical data
1922 * \public \memberof mlt_properties_s
1923 * \param self a properties list
1924 * \return a string containing YAML Tiny that represents the properties list
1927 char *mlt_properties_serialise_yaml( mlt_properties self )
1929 const char *lc_numeric = mlt_properties_get_lcnumeric( self );
1930 strbuf b = strbuf_new();
1931 strbuf_printf( b, "---\n" );
1932 mlt_properties_set_lcnumeric( self, "C" );
1933 serialise_yaml( self, b, 0, 0 );
1934 mlt_properties_set_lcnumeric( self, lc_numeric );
1935 strbuf_printf( b, "...\n" );
1936 char *ret = b->string;
1941 /** Protect a properties list against concurrent access.
1943 * \public \memberof mlt_properties_s
1944 * \param self a properties list
1947 void mlt_properties_lock( mlt_properties self )
1950 pthread_mutex_lock( &( ( property_list* )( self->local ) )->mutex );
1953 /** End protecting a properties list against concurrent access.
1955 * \public \memberof mlt_properties_s
1956 * \param self a properties list
1959 void mlt_properties_unlock( mlt_properties self )
1962 pthread_mutex_unlock( &( ( property_list* )( self->local ) )->mutex );
1965 /** Get a time string associated to the name.
1967 * Do not free the returned string. It's lifetime is controlled by the property.
1968 * \public \memberof mlt_properties_s
1969 * \param self a properties list
1970 * \param name the property to get
1971 * \param format the time format that you want
1972 * \return the property's time value or NULL if \p name does not exist or there is no profile
1975 char *mlt_properties_get_time( mlt_properties self, const char* name, mlt_time_format format )
1977 mlt_profile profile = mlt_properties_get_data( self, "_profile", NULL );
1980 double fps = mlt_profile_fps( profile );
1981 mlt_property value = mlt_properties_find( self, name );
1982 property_list *list = self->local;
1983 return value == NULL ? NULL : mlt_property_get_time( value, format, fps, list->locale );