provisional framework docs and corrections

[melted] / src / framework / mlt_factory.c

diff --git a/src/framework/mlt_factory.c b/src/framework/mlt_factory.c
index 9223178..dee338e 100644 (file)
--- a/src/framework/mlt_factory.c
+++ b/src/framework/mlt_factory.c
@@ -22,6 +22,7 @@
 #include "mlt.h"
 #include "mlt_repository.h"
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -29,11 +30,13 @@
 */
 
 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 int unique_id = 0;
 
 /** Construct the factories.
 */
@@ -43,6 +46,10 @@ int mlt_factory_init( char *prefix )
        // Only initialise once
        if ( mlt_prefix == NULL )
        {
+               // Allow user over rides
+               if ( prefix == NULL )
+                       prefix = getenv( "MLT_REPOSITORY" );
+
                // If no directory is specified, default to install directory
                if ( prefix == NULL )
                        prefix = PREFIX_DATA;
@@ -50,9 +57,17 @@ int mlt_factory_init( char *prefix )
                // Store the prefix for later retrieval
                mlt_prefix = strdup( prefix );
 
+               // Initialise the pool
+               mlt_pool_init( );
+
+               // Create the global properties
+               global_properties = mlt_properties_new( );
+               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" );
+
                // Create the object list.
-               object_list = calloc( sizeof( struct mlt_properties_s ), 1 );
-               mlt_properties_init( object_list, NULL );
+               object_list = mlt_properties_new( );
 
                // Create a repository for each service type
                producers = mlt_repository_init( object_list, prefix, "producers.dat", "mlt_create_producer" );
@@ -72,17 +87,35 @@ const char *mlt_factory_prefix( )
        return mlt_prefix;
 }
 
+/** Get a value from the environment.
+*/
+
+char *mlt_environment( 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 obj = mlt_repository_fetch( producers, service, input );
+       mlt_producer obj = NULL;
+
+       // Pick up the default normalising producer if necessary
+       if ( service == NULL )
+               service = mlt_environment( "MLT_PRODUCER" );
+
+       // Try to instantiate via the specified service
+       obj = mlt_repository_fetch( producers, service, input );
+
        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" );
-               mlt_properties_set( properties, "mlt_service", service );
+               if ( mlt_properties_get_int( properties, "_mlt_service_hidden" ) == 0 )
+                       mlt_properties_set( properties, "mlt_service", service );
        }
        return obj;
 }
@@ -96,6 +129,7 @@ mlt_filter mlt_factory_filter( char *service, void *input )
        if ( obj != NULL )
        {
                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 );
        }
@@ -111,6 +145,7 @@ mlt_transition mlt_factory_transition( char *service, void *input )
        if ( obj != NULL )
        {
                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 );
        }
@@ -122,10 +157,17 @@ mlt_transition mlt_factory_transition( char *service, void *input )
 
 mlt_consumer mlt_factory_consumer( 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" );
+
+       obj = mlt_repository_fetch( consumers, service, input );
+
        if ( obj != 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 );
        }
@@ -144,9 +186,10 @@ void mlt_factory_close( )
                mlt_repository_close( transitions );
                mlt_repository_close( consumers );
                mlt_properties_close( object_list );
+               mlt_properties_close( global_properties );
                free( mlt_prefix );
-               free( object_list );
                mlt_prefix = NULL;
+               mlt_pool_close( );
        }
 }