X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_repository.c;h=715039798e8b4374a5290428409b67f2a01ca72c;hb=155087f253fe520bac16f947d815645e3ee551c1;hp=3ab95bed696fe384b960f6fa31b0d34f093e22aa;hpb=6967e58ddd118f3fd0e071cfaeff89c56fd612c5;p=melted diff --git a/src/framework/mlt_repository.c b/src/framework/mlt_repository.c index 3ab95be..7150397 100644 --- a/src/framework/mlt_repository.c +++ b/src/framework/mlt_repository.c @@ -1,7 +1,10 @@ -/* - * repository.c -- provides a map between service and shared objects - * Copyright (C) 2003-2004 Ushodaya Enterprises Limited - * Author: Charles Yates +/** + * \file mlt_repository.c + * \brief provides a map between service and shared objects + * + * Copyright (C) 2003-2008 Ushodaya Enterprises Limited + * \author Charles Yates + * Dan Dennedy * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -20,12 +23,18 @@ #include "mlt_repository.h" #include "mlt_properties.h" +#include "mlt_tokeniser.h" #include #include #include #include +/** \brief Repository class + * + * \extends mlt_properties_s + */ + struct mlt_repository_s { struct mlt_properties_s parent; // a list of object files @@ -35,12 +44,15 @@ struct mlt_repository_s mlt_properties transitions; }; +/** 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 ); @@ -53,7 +65,7 @@ mlt_repository mlt_repository_init( const char *directory ) mlt_properties dir = mlt_properties_new(); int count = mlt_properties_dir_list( dir, directory, NULL, 0 ); int i; - + // Iterate over files for ( i = 0; i < count; i++ ) { @@ -66,17 +78,17 @@ mlt_repository mlt_repository_init( const char *directory ) flags |= RTLD_GLOBAL; // Open the shared object - void *object = dlopen( object_name, flags ); + void *object = dlopen( object_name, flags ); 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 ) { symbol_ptr( this ); - + // Register the object file for closure mlt_properties_set_data( &this->parent, object_name, object, 0, ( mlt_destructor )dlclose, NULL ); } @@ -85,60 +97,94 @@ mlt_repository mlt_repository_init( const char *directory ) dlclose( object ); } } + else if ( strstr( object_name, "libmlt" ) ) + { + fprintf( stderr, "%s, %s: failed to dlopen %s\n (%s)\n", __FILE__, __FUNCTION__, object_name, dlerror() ); + } } - + + mlt_properties_close( dir ); + 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_create( 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; } - - // Construct the service - return ( symbol_ptr != NULL ) ? symbol_ptr( profile, type, service, input ) : NULL; + 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; + } + return NULL; +} + +/** Destroy a repository +*/ + void mlt_repository_close( mlt_repository this ) { mlt_properties_close( this->consumers ); @@ -148,3 +194,146 @@ 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; +} + +static char *getenv_locale() +{ + char *s = getenv( "LANGUAGE" ); + if ( s && s[0] ) + return s; + s = getenv( "LC_ALL" ); + if ( s && s[0] ) + return s; + s = getenv( "LC_MESSAGES" ); + if ( s && s[0] ) + return s; + s = getenv( "LANG" ); + if ( s && s[0] ) + return s; + return NULL; +} + +/** Return a list of user-preferred language codes taken from environment variables. +*/ + +mlt_properties mlt_repository_languages( mlt_repository self ) +{ + mlt_properties languages = mlt_properties_get_data( &self->parent, "languages", NULL ); + if ( languages ) + return languages; + + languages = mlt_properties_new(); + char *locale = getenv_locale(); + if ( locale ) + { + locale = strdup( locale ); + mlt_tokeniser tokeniser = mlt_tokeniser_init(); + int count = mlt_tokeniser_parse_new( tokeniser, locale, ":" ); + if ( count ) + { + int i; + for ( i = 0; i < count; i++ ) + { + char *locale = mlt_tokeniser_get_string( tokeniser, i ); + if ( strcmp( locale, "C" ) == 0 || strcmp( locale, "POSIX" ) == 0 ) + locale = "en"; + else if ( strlen( locale ) > 2 ) + locale[2] = 0; + char string[21]; + snprintf( string, sizeof(string), "%d", i ); + mlt_properties_set( languages, string, locale ); + } + } + else + { + mlt_properties_set( languages, "0", "en" ); + } + free( locale ); + mlt_tokeniser_close( tokeniser ); + } + else + { + mlt_properties_set( languages, "0", "en" ); + } + mlt_properties_set_data( &self->parent, "languages", languages, 0, ( mlt_destructor )mlt_properties_close, NULL ); + return languages; +}