X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_factory.c;h=d551cfac4167a609bd347b0e28cd28f65df65555;hb=bf3264b9e340ba5c11cbf59835a8af3db94e0cc2;hp=419a7d324b2d7d6e3758cf7b2e826e52178a6f1b;hpb=ec7f7d58e000242e918c2ae2cebd172bffe6e9d4;p=melted diff --git a/src/framework/mlt_factory.c b/src/framework/mlt_factory.c index 419a7d3..d551cfa 100644 --- a/src/framework/mlt_factory.c +++ b/src/framework/mlt_factory.c @@ -3,19 +3,19 @@ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited * Author: Charles Yates * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. * - * This program is distributed in the hope that it will be useful, + * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" @@ -30,20 +30,42 @@ */ static char *mlt_prefix = NULL; +static mlt_properties global_properties = NULL; static mlt_properties object_list = NULL; static mlt_repository producers = NULL; static mlt_repository filters = NULL; static mlt_repository transitions = NULL; static mlt_repository consumers = NULL; +static mlt_properties event_object = NULL; +static int unique_id = 0; + +/** Event transmitters. +*/ + +static void mlt_factory_create_request( mlt_listener listener, mlt_properties owner, mlt_service this, void **args ) +{ + if ( listener != NULL ) + listener( owner, this, ( char * )args[ 0 ], ( char * )args[ 1 ], ( mlt_service * )args[ 2 ] ); +} + +static void mlt_factory_create_done( mlt_listener listener, mlt_properties owner, mlt_service this, void **args ) +{ + if ( listener != NULL ) + listener( owner, this, ( char * )args[ 0 ], ( char * )args[ 1 ], ( mlt_service )args[ 2 ] ); +} /** Construct the factories. */ -int mlt_factory_init( char *prefix ) +int mlt_factory_init( const char *prefix ) { // Only initialise once if ( mlt_prefix == NULL ) { + // Allow user over rides + if ( prefix == NULL || !strcmp( prefix, "" ) ) + prefix = getenv( "MLT_REPOSITORY" ); + // If no directory is specified, default to install directory if ( prefix == NULL ) prefix = PREFIX_DATA; @@ -51,19 +73,57 @@ int mlt_factory_init( char *prefix ) // Store the prefix for later retrieval mlt_prefix = strdup( prefix ); + // Initialise the pool + mlt_pool_init( ); + + // Create and set up the events object + event_object = mlt_properties_new( ); + mlt_events_init( event_object ); + mlt_events_register( event_object, "producer-create-request", ( mlt_transmitter )mlt_factory_create_request ); + mlt_events_register( event_object, "producer-create-done", ( mlt_transmitter )mlt_factory_create_done ); + mlt_events_register( event_object, "filter-create-request", ( mlt_transmitter )mlt_factory_create_request ); + mlt_events_register( event_object, "filter-create-done", ( mlt_transmitter )mlt_factory_create_done ); + mlt_events_register( event_object, "transition-create-request", ( mlt_transmitter )mlt_factory_create_request ); + mlt_events_register( event_object, "transition-create-done", ( mlt_transmitter )mlt_factory_create_done ); + mlt_events_register( event_object, "consumer-create-request", ( mlt_transmitter )mlt_factory_create_request ); + mlt_events_register( event_object, "consumer-create-done", ( mlt_transmitter )mlt_factory_create_done ); + + // Create the global properties + global_properties = mlt_properties_new( ); + // Create the object list. object_list = mlt_properties_new( ); // Create a repository for each service type - producers = mlt_repository_init( object_list, prefix, "producers.dat", "mlt_create_producer" ); - filters = mlt_repository_init( object_list, prefix, "filters.dat", "mlt_create_filter" ); - transitions = mlt_repository_init( object_list, prefix, "transitions.dat", "mlt_create_transition" ); - consumers = mlt_repository_init( object_list, prefix, "consumers.dat", "mlt_create_consumer" ); + producers = mlt_repository_init( object_list, prefix, "producers", "mlt_create_producer" ); + filters = mlt_repository_init( object_list, prefix, "filters", "mlt_create_filter" ); + transitions = mlt_repository_init( object_list, prefix, "transitions", "mlt_create_transition" ); + consumers = mlt_repository_init( object_list, prefix, "consumers", "mlt_create_consumer" ); + + // Force a clean up when app closes + atexit( mlt_factory_close ); + } + + // Allow property refresh on a subsequent initialisation + if ( global_properties != NULL ) + { + mlt_properties_set_or_default( global_properties, "MLT_NORMALISATION", getenv( "MLT_NORMALISATION" ), "PAL" ); + mlt_properties_set_or_default( global_properties, "MLT_PRODUCER", getenv( "MLT_PRODUCER" ), "fezzik" ); + mlt_properties_set_or_default( global_properties, "MLT_CONSUMER", getenv( "MLT_CONSUMER" ), "sdl" ); + mlt_properties_set( global_properties, "MLT_TEST_CARD", getenv( "MLT_TEST_CARD" ) ); } return 0; } +/** Fetch the events object. +*/ + +mlt_properties mlt_factory_event_object( ) +{ + return event_object; +} + /** Fetch the prefix used in this instance. */ @@ -72,17 +132,41 @@ const char *mlt_factory_prefix( ) return mlt_prefix; } +/** Get a value from the environment. +*/ + +char *mlt_environment( const char *name ) +{ + return mlt_properties_get( global_properties, name ); +} + /** Fetch a producer from the repository. */ -mlt_producer mlt_factory_producer( char *service, void *input ) +mlt_producer mlt_factory_producer( const char *service, void *input ) { - mlt_producer obj = mlt_repository_fetch( producers, service, input ); - if ( obj != NULL ) + mlt_producer obj = NULL; + + // Pick up the default normalising producer if necessary + if ( service == NULL ) + service = mlt_environment( "MLT_PRODUCER" ); + + // Offer the application the chance to 'create' + mlt_events_fire( event_object, "producer-create-request", service, input, &obj, NULL ); + + // Try to instantiate via the specified service + if ( obj == NULL ) { - mlt_properties properties = mlt_producer_properties( obj ); - mlt_properties_set( properties, "mlt_type", "producer" ); - mlt_properties_set( properties, "mlt_service", service ); + obj = mlt_repository_fetch( producers, service, input ); + mlt_events_fire( event_object, "producer-create-done", service, input, obj, NULL ); + if ( obj != NULL ) + { + mlt_properties properties = MLT_PRODUCER_PROPERTIES( obj ); + mlt_properties_set_int( properties, "_unique_id", ++ unique_id ); + mlt_properties_set( properties, "mlt_type", "producer" ); + if ( mlt_properties_get_int( properties, "_mlt_service_hidden" ) == 0 ) + mlt_properties_set( properties, "mlt_service", service ); + } } return obj; } @@ -90,12 +174,23 @@ mlt_producer mlt_factory_producer( char *service, void *input ) /** Fetch a filter from the repository. */ -mlt_filter mlt_factory_filter( char *service, void *input ) +mlt_filter mlt_factory_filter( const char *service, void *input ) { - mlt_filter obj = mlt_repository_fetch( filters, service, input ); + mlt_filter obj = NULL; + + // Offer the application the chance to 'create' + mlt_events_fire( event_object, "filter-create-request", service, input, &obj, NULL ); + + if ( obj == NULL ) + { + obj = mlt_repository_fetch( filters, service, input ); + mlt_events_fire( event_object, "filter-create-done", service, input, obj, NULL ); + } + if ( obj != NULL ) { - mlt_properties properties = mlt_filter_properties( obj ); + mlt_properties properties = MLT_FILTER_PROPERTIES( obj ); + mlt_properties_set_int( properties, "_unique_id", ++ unique_id ); mlt_properties_set( properties, "mlt_type", "filter" ); mlt_properties_set( properties, "mlt_service", service ); } @@ -105,12 +200,23 @@ mlt_filter mlt_factory_filter( char *service, void *input ) /** Fetch a transition from the repository. */ -mlt_transition mlt_factory_transition( char *service, void *input ) +mlt_transition mlt_factory_transition( const char *service, void *input ) { - mlt_transition obj = mlt_repository_fetch( transitions, service, input ); + mlt_transition obj = NULL; + + // Offer the application the chance to 'create' + mlt_events_fire( event_object, "transition-create-request", service, input, &obj, NULL ); + + if ( obj == NULL ) + { + obj = mlt_repository_fetch( transitions, service, input ); + mlt_events_fire( event_object, "transition-create-done", service, input, obj, NULL ); + } + if ( obj != NULL ) { - mlt_properties properties = mlt_transition_properties( obj ); + mlt_properties properties = MLT_TRANSITION_PROPERTIES( obj ); + mlt_properties_set_int( properties, "_unique_id", ++ unique_id ); mlt_properties_set( properties, "mlt_type", "transition" ); mlt_properties_set( properties, "mlt_service", service ); } @@ -120,18 +226,45 @@ mlt_transition mlt_factory_transition( char *service, void *input ) /** Fetch a consumer from the repository */ -mlt_consumer mlt_factory_consumer( char *service, void *input ) +mlt_consumer mlt_factory_consumer( const char *service, void *input ) { - mlt_consumer obj = mlt_repository_fetch( consumers, service, input ); + mlt_consumer obj = NULL; + + if ( service == NULL ) + service = mlt_environment( "MLT_CONSUMER" ); + + // Offer the application the chance to 'create' + mlt_events_fire( event_object, "consumer-create-request", service, input, &obj, NULL ); + + if ( obj == NULL ) + { + obj = mlt_repository_fetch( consumers, service, input ); + mlt_events_fire( event_object, "consumer-create-done", service, input, obj, NULL ); + } + if ( obj != NULL ) { - mlt_properties properties = mlt_consumer_properties( obj ); + mlt_filter filter = mlt_factory_filter( "data_show", NULL ); + mlt_properties properties = MLT_CONSUMER_PROPERTIES( obj ); + mlt_properties_set_int( properties, "_unique_id", ++ unique_id ); mlt_properties_set( properties, "mlt_type", "consumer" ); mlt_properties_set( properties, "mlt_service", service ); + mlt_service_attach( MLT_CONSUMER_SERVICE( obj ), filter ); + mlt_filter_close( filter ); } return obj; } +/** Register an object for clean up. +*/ + +void mlt_factory_register_for_clean_up( void *ptr, mlt_destructor destructor ) +{ + char unique[ 256 ]; + sprintf( unique, "%08d", mlt_properties_count( global_properties ) ); + mlt_properties_set_data( global_properties, unique, ptr, 0, destructor, NULL ); +} + /** Close the factory. */ @@ -139,13 +272,16 @@ void mlt_factory_close( ) { if ( mlt_prefix != NULL ) { + mlt_properties_close( event_object ); mlt_repository_close( producers ); mlt_repository_close( filters ); mlt_repository_close( transitions ); mlt_repository_close( consumers ); + mlt_properties_close( global_properties ); mlt_properties_close( object_list ); free( mlt_prefix ); mlt_prefix = NULL; + mlt_pool_close( ); } }