X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_repository.c;h=69c89eb45cbf5ebaa03c763c18ec9bee8cc62ba8;hb=d5338ba9fdcb7647c7484829f5424a70dbfbb53e;hp=7f474f33a8ff4c87e7f16b0f65545126757b1766;hpb=16b6d374cf80004b192aae74a55b0452c7ee809d;p=melted diff --git a/src/framework/mlt_repository.c b/src/framework/mlt_repository.c index 7f474f3..69c89eb 100644 --- a/src/framework/mlt_repository.c +++ b/src/framework/mlt_repository.c @@ -2,6 +2,7 @@ * repository.c -- provides a map between service and shared objects * Copyright (C) 2003-2004 Ushodaya Enterprises Limited * Author: Charles Yates + * Contributor: Dan Dennedy * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -35,8 +36,15 @@ struct mlt_repository_s mlt_properties transitions; }; -mlt_repository mlt_repository_init( const char *prefix ) +/** Construct a new repository +*/ + +mlt_repository mlt_repository_init( const char *directory ) { + // Safety check + if ( directory == NULL || strcmp( directory, "" ) == 0 ) + return NULL; + // Construct the repository mlt_repository this = calloc( sizeof( struct mlt_repository_s ), 1 ); mlt_properties_init( &this->parent, this ); @@ -44,10 +52,10 @@ mlt_repository mlt_repository_init( const char *prefix ) this->filters = mlt_properties_new(); this->producers = mlt_properties_new(); this->transitions = mlt_properties_new(); - + // Get the directory list mlt_properties dir = mlt_properties_new(); - int count = mlt_properties_dir_list( dir, prefix, NULL, 0 ); + int count = mlt_properties_dir_list( dir, directory, NULL, 0 ); int i; // Iterate over files @@ -66,7 +74,7 @@ mlt_repository mlt_repository_init( const char *prefix ) if ( object != NULL ) { // Get the registration function - int ( *symbol_ptr )( mlt_repository ) = dlsym( object, "mlt_register" ); + mlt_repository_callback symbol_ptr = dlsym( object, "mlt_register" ); // Call the registration function if ( symbol_ptr != NULL ) @@ -81,60 +89,92 @@ mlt_repository mlt_repository_init( const char *prefix ) dlclose( object ); } } + else if ( strstr( object_name, "libmlt" ) ) + { + fprintf( stderr, "%s, %s: failed to dlopen %s\n", __FILE__, __FUNCTION__, object_name ); + } } return this; } -void mlt_repository_register( mlt_repository this, mlt_service_type service_type, const char *service, void *symbol ) +static mlt_properties new_service( void *symbol ) +{ + mlt_properties properties = mlt_properties_new(); + mlt_properties_set_data( properties, "symbol", symbol, 0, NULL, NULL ); + return properties; +} + +/** Register a service with the repository + Typically, this is invoked by a module within its mlt_register(). +*/ + +void mlt_repository_register( mlt_repository this, mlt_service_type service_type, const char *service, mlt_register_callback symbol ) { // Add the entry point to the corresponding service list switch ( service_type ) { case consumer_type: - mlt_properties_set_data( this->consumers, service, symbol, 0, NULL, NULL ); + mlt_properties_set_data( this->consumers, service, new_service( symbol ), 0, ( mlt_destructor )mlt_properties_close, NULL ); break; case filter_type: - mlt_properties_set_data( this->filters, service, symbol, 0, NULL, NULL ); + mlt_properties_set_data( this->filters, service, new_service( symbol ), 0, ( mlt_destructor )mlt_properties_close, NULL ); break; case producer_type: - mlt_properties_set_data( this->producers, service, symbol, 0, NULL, NULL ); + mlt_properties_set_data( this->producers, service, new_service( symbol ), 0, ( mlt_destructor )mlt_properties_close, NULL ); break; case transition_type: - mlt_properties_set_data( this->transitions, service, symbol, 0, NULL, NULL ); + mlt_properties_set_data( this->transitions, service, new_service( symbol ), 0, ( mlt_destructor )mlt_properties_close, NULL ); break; default: break; } } -void *mlt_repository_fetch( mlt_repository this, mlt_profile profile, mlt_service_type type, const char *service, void *input ) +static mlt_properties get_service_properties( mlt_repository this, mlt_service_type type, const char *service ) { - void *( *symbol_ptr )( mlt_profile, mlt_service_type, const char *, void * ) = NULL; + mlt_properties service_properties = NULL; // Get the entry point from the corresponding service list switch ( type ) { case consumer_type: - symbol_ptr = mlt_properties_get_data( this->consumers, service, NULL ); + service_properties = mlt_properties_get_data( this->consumers, service, NULL ); break; case filter_type: - symbol_ptr = mlt_properties_get_data( this->filters, service, NULL ); + service_properties = mlt_properties_get_data( this->filters, service, NULL ); break; case producer_type: - symbol_ptr = mlt_properties_get_data( this->producers, service, NULL ); + service_properties = mlt_properties_get_data( this->producers, service, NULL ); break; case transition_type: - symbol_ptr = mlt_properties_get_data( this->transitions, service, NULL ); + service_properties = mlt_properties_get_data( this->transitions, service, NULL ); break; default: break; } + return service_properties; +} + +/** Construct a new instance of a service +*/ + +void *mlt_repository_create( mlt_repository this, mlt_profile profile, mlt_service_type type, const char *service, void *input ) +{ + mlt_properties properties = get_service_properties( this, type, service ); + if ( properties != NULL ) + { + mlt_register_callback symbol_ptr = mlt_properties_get_data( properties, "symbol", NULL ); - // Construct the service - return ( symbol_ptr != NULL ) ? symbol_ptr( profile, type, service, input ) : NULL; + // Construct the service + return ( symbol_ptr != NULL ) ? symbol_ptr( profile, type, service, input ) : NULL; + } + return NULL; } +/** Destroy a repository +*/ + void mlt_repository_close( mlt_repository this ) { mlt_properties_close( this->consumers ); @@ -144,3 +184,83 @@ void mlt_repository_close( mlt_repository this ) mlt_properties_close( &this->parent ); free( this ); } + +/** Get the list of registered consumers +*/ + +mlt_properties mlt_repository_consumers( mlt_repository self ) +{ + return self->consumers; +} + +/** Get the list of registered filters +*/ + +mlt_properties mlt_repository_filters( mlt_repository self ) +{ + return self->filters; +} + +/** Get the list of registered producers +*/ + +mlt_properties mlt_repository_producers( mlt_repository self ) +{ + return self->producers; +} + +/** Get the list of registered transitions +*/ + +mlt_properties mlt_repository_transitions( mlt_repository self ) +{ + return self->transitions; +} + +/** Register the metadata for a service + IMPORTANT: mlt_repository will take responsibility for deallocating the metadata properties that you supply! +*/ +void mlt_repository_register_metadata( mlt_repository self, mlt_service_type type, const char *service, mlt_metadata_callback callback, void *callback_data ) +{ + mlt_properties service_properties = get_service_properties( self, type, service ); + mlt_properties_set_data( service_properties, "metadata_cb", callback, 0, NULL, NULL ); + mlt_properties_set_data( service_properties, "metadata_cb_data", callback_data, 0, NULL, NULL ); +} + +/** Get the metadata about a service + Returns NULL if service or its metadata are unavailable. +*/ + +mlt_properties mlt_repository_metadata( mlt_repository self, mlt_service_type type, const char *service ) +{ + mlt_properties metadata = NULL; + mlt_properties properties = get_service_properties( self, type, service ); + + // If this is a valid service + if ( properties ) + { + // Lookup cached metadata + metadata = mlt_properties_get_data( properties, "metadata", NULL ); + if ( ! metadata ) + { + // Not cached, so get the registered metadata callback function + mlt_metadata_callback callback = mlt_properties_get_data( properties, "metadata_cb", NULL ); + + // If a metadata callback function is registered + if ( callback ) + { + // Fetch the callback data arg + void *data = mlt_properties_get_data( properties, "metadata_cb_data", NULL ); + + // Fetch the metadata through the callback + metadata = callback( type, service, data ); + + // Cache the metadata + if ( metadata ) + // Include dellocation and serialisation + mlt_properties_set_data( properties, "metadata", metadata, 0, ( mlt_destructor )mlt_properties_close, ( mlt_serialiser )mlt_properties_serialise_yaml ); + } + } + } + return metadata; +}