/*
- * producer_libdv.c -- a libxml2 parser of mlt service networks
+ * producer_westley.c -- a libxml2 parser of mlt service networks
* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
* Author: Dan Dennedy <dan@dennedy.org>
*
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+// TODO: destroy unreferenced producers
+
#include "producer_westley.h"
#include <framework/mlt.h>
#include <stdlib.h>
int stack_service_size;
int track_count;
mlt_properties producer_map;
- int filter_count;
- int transition_count;
+ mlt_properties destructors;
};
typedef struct deserialise_context_s *deserialise_context;
return result;
}
+// Set the destructor on a new service
+static void track_service( mlt_properties properties, void *service, mlt_destructor destructor )
+{
+ int registered = mlt_properties_get_int( properties, "registered" );
+ char *key = mlt_properties_get( properties, "registered" );
+ mlt_properties_set_data( properties, key, service, 0, destructor, NULL );
+ mlt_properties_set_int( properties, "registered", ++ registered );
+}
+
static void on_start_tractor( deserialise_context context, const xmlChar *name, const xmlChar **atts)
{
mlt_service service = mlt_tractor_service( mlt_tractor_init() );
+ track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close );
+
for ( ; atts != NULL && *atts != NULL; atts += 2 )
mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] );
{
mlt_service service = mlt_multitrack_service( mlt_multitrack_init() );
+ track_service( context->destructors, service, (mlt_destructor) mlt_multitrack_close );
+
for ( ; atts != NULL && *atts != NULL; atts += 2 )
mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] );
mlt_service service = mlt_playlist_service( mlt_playlist_init() );
mlt_properties properties = mlt_service_properties( service );
+ track_service( context->destructors, service, (mlt_destructor) mlt_playlist_close );
+
for ( ; atts != NULL && *atts != NULL; atts += 2 )
mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
mlt_service service = NULL;
for ( ; atts != NULL && *atts != NULL; atts += 2 )
+ {
mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
+ }
if ( mlt_properties_get( properties, "mlt_service" ) != NULL )
{
service = MLT_SERVICE( mlt_factory_producer( "inigo", args ) );
}
+ track_service( context->destructors, service, (mlt_destructor) mlt_producer_close );
+
+ // Add the producer to the producer map
if ( mlt_properties_get( properties, "id" ) != NULL )
mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
{
char *id;
mlt_properties properties = mlt_properties_new();
+ char key[11];
+ key[ 10 ] = '\0';
// Get the producer from the stack
mlt_service producer = context_pop_service( context );
// Create the filter
mlt_service service = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) );
+ track_service( context->destructors, service, (mlt_destructor) mlt_filter_close );
+
// Connect the filter to the producer
mlt_filter_connect( MLT_FILTER( service ), producer,
mlt_properties_get_int( properties, "track" ) );
- // Generate an id if one does not exist
- if ( mlt_properties_get( properties, "id" ) == NULL )
- {
- char id[ 31 ];
- id[ 30 ] = '\0';
- snprintf( id, 30, "filter%d", context->filter_count++ );
- mlt_properties_set( properties, "id", id );
- }
+ // Set in and out from producer if non existant
+ if ( mlt_properties_get( properties, "in" ) == NULL )
+ mlt_properties_set_position( properties, "in", mlt_producer_get_in( MLT_PRODUCER( producer ) ) );
+ if ( mlt_properties_get( properties, "out" ) == NULL )
+ mlt_properties_set_position( properties, "out", mlt_producer_get_out( MLT_PRODUCER( producer ) ) );
// Propogate the properties
mlt_properties_inherit( mlt_service_properties( service ), properties );
}
// If a producer alias is in the producer_map, get it
- id = mlt_properties_get( context->producer_map, mlt_properties_get( mlt_service_properties( producer ), "id" ) );
- if ( id != NULL && mlt_properties_get_data( context->producer_map, id, NULL ) != NULL )
- {
+ snprintf( key, 10, "%p", producer );
+ if ( mlt_properties_get_data( context->producer_map, key, NULL ) != NULL )
+ producer = mlt_properties_get_data( context->producer_map, key, NULL );
+
+ // Put the producer in the producer map
+ id = mlt_properties_get( mlt_service_properties( producer ), "id" );
+ if ( id != NULL )
mlt_properties_set_data( context->producer_map, id, service, 0, NULL, NULL );
-
- // For filter chain support, add an alias to the producer map
- // alias the filter id as the producer id
- mlt_properties_set( context->producer_map, mlt_properties_get( mlt_service_properties( service ), "id" ), id );
- }
- else
- {
- // If the producer is in the producer_map, update it
- id = mlt_properties_get( mlt_service_properties( producer ), "id" );
- if ( id != NULL && mlt_properties_get_data( context->producer_map, id, NULL ) != NULL )
- {
- mlt_properties_set_data( context->producer_map, id, service, 0, NULL, NULL );
-
- // For filter chain support, add an alias to the producer map
- // alias the filter id as the producer id
- mlt_properties_set( context->producer_map, mlt_properties_get( mlt_service_properties( service ), "id" ), id );
- }
- }
+
+ // For filter chain support, add an alias to the producer map
+ snprintf( key, 10, "%p", service );
+ mlt_properties_set_data( context->producer_map, key, producer, 0, NULL, NULL );
// Push the filter onto the stack
context_push_service( context, service );
// Create the transition
mlt_service service = MLT_SERVICE( mlt_factory_transition( mlt_properties_get( properties, "mlt_service" ), NULL ) );
- // Generate an id if one does not exist
- if ( mlt_properties_get( properties, "id" ) == NULL )
- {
- char id[ 31 ];
- id[ 30 ] = '\0';
- snprintf( id, 30, "transition%d", context->transition_count++ );
- mlt_properties_set( properties, "id", id );
- }
+ track_service( context->destructors, service, (mlt_destructor) mlt_transition_close );
// Propogate the properties
mlt_properties_inherit( mlt_service_properties( service ), properties );
context_push_service( context, service );
}
+static void on_end_tractor( deserialise_context context, const xmlChar *name )
+{
+ // Get and discard the last producer
+ mlt_producer multitrack = MLT_PRODUCER( context_pop_service( context ) );
+
+ // Inherit the producer's properties
+ mlt_properties properties = mlt_producer_properties( multitrack );
+ mlt_properties_set_position( properties, "length", mlt_producer_get_out( multitrack ) + 1 );
+ mlt_producer_set_in_and_out( multitrack, 0, mlt_producer_get_out( multitrack ) );
+ mlt_properties_set_double( properties, "fps", mlt_producer_get_fps( multitrack ) );
+}
+
static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
{
deserialise_context context = ( deserialise_context ) ctx;
else if ( strcmp( name, "entry" ) == 0 )
on_end_entry( context, name );
else if ( strcmp( name, "tractor" ) == 0 )
- {
- // Discard the last producer
- context_pop_service( context );
- }
+ on_end_tractor( context, name );
}
mlt_producer producer_westley_init( char *filename )
{
+ static int init = 0;
xmlSAXHandler *sax = calloc( 1, sizeof( xmlSAXHandler ) );
struct deserialise_context_s *context = calloc( 1, sizeof( struct deserialise_context_s ) );
+ mlt_properties properties = NULL;
+ int i = 0;
context->producer_map = mlt_properties_new();
+ context->destructors = mlt_properties_new();
+ // We need to track the number of registered filters
+ mlt_properties_set_int( context->destructors, "registered", 0 );
sax->startElement = on_start_element;
sax->endElement = on_end_element;
- xmlInitParser();
+ if ( !init )
+ {
+ xmlInitParser();
+ init = 1;
+ }
+
xmlSAXUserParseFile( sax, context, filename );
- xmlCleanupParser();
free( sax );
- mlt_properties_close( context->producer_map );
+ // Need the complete producer list for various reasons
+ properties = context->destructors;
+ // Get the last producer on the stack
mlt_service service = context_pop_service( context );
+
+ // Do we actually have a producer here?
+ if ( service != NULL )
+ {
+ // Now make sure we don't have a reference to the service in the properties
+ for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
+ {
+ char *name = mlt_properties_get_name( properties, i );
+ if ( mlt_properties_get_data( properties, name, NULL ) == service )
+ {
+ mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
+ break;
+ }
+ }
+
+ // We are done referencing destructor property list
+ // Set this var to service properties for convenience
+ properties = mlt_service_properties( service );
+
+ // make the returned service destroy the connected services
+ mlt_properties_set_data( properties, "__destructors__", context->destructors, 0, (mlt_destructor) mlt_properties_close, NULL );
+
+ // Now assign additional properties
+ mlt_properties_set( properties, "resource", filename );
+
+ // This tells consumer_westley not to deep copy
+ mlt_properties_set( properties, "westley", "was here" );
+ }
+ else
+ {
+ // Clean up
+ mlt_properties_close( properties );
+ }
+
+ free( context->stack_service );
+ mlt_properties_close( context->producer_map );
free( context );
return MLT_PRODUCER( service );
projects / melted / blobdiff