/*
- * 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>
#include <libxml/parser.h>
-static mlt_producer parse_westley( char *file )
+#define STACK_SIZE 1000
+
+struct deserialise_context_s
+{
+ mlt_service stack_service[ STACK_SIZE ];
+ int stack_service_size;
+ int track_count;
+ mlt_properties producer_map;
+ mlt_properties destructors;
+};
+typedef struct deserialise_context_s *deserialise_context;
+
+
+/** Push a service.
+*/
+
+static int context_push_service( deserialise_context this, mlt_service that )
+{
+ int ret = this->stack_service_size >= STACK_SIZE;
+ if ( ret == 0 )
+ this->stack_service[ this->stack_service_size ++ ] = that;
+ return ret;
+}
+
+/** Pop a service.
+*/
+
+static mlt_service context_pop_service( deserialise_context this )
+{
+ mlt_service result = NULL;
+ if ( this->stack_service_size > 0 )
+ result = this->stack_service[ -- this->stack_service_size ];
+ 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() );
+ mlt_properties properties = mlt_service_properties( service );
+
+ track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close );
+
+ mlt_properties_set_position( properties, "length", 0 );
+
+ for ( ; atts != NULL && *atts != NULL; atts += 2 )
+ mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] );
+
+ if ( mlt_properties_get_position( properties, "length" ) < mlt_properties_get_position( properties, "out" ) )
+ {
+ mlt_position length = mlt_properties_get_position( properties, "out" ) + 1;
+ mlt_properties_set_position( properties, "length", length );
+ }
+
+ context_push_service( context, service );
+}
+
+static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts)
+{
+ 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] );
+
+ context_push_service( context, service );
+}
+
+static void on_start_playlist( deserialise_context context, const xmlChar *name, const xmlChar **atts)
+{
+ 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 );
+
+ mlt_properties_set_position( properties, "length", 0 );
+
+ for ( ; atts != NULL && *atts != NULL; atts += 2 )
+ mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
+
+ if ( mlt_properties_get( properties, "id" ) != NULL )
+ mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
+
+ if ( mlt_properties_get_position( properties, "length" ) < mlt_properties_get_position( properties, "out" ) )
+ {
+ mlt_position length = mlt_properties_get_position( properties, "out" ) + 1;
+ mlt_properties_set_position( properties, "length", length );
+ }
+
+ context_push_service( context, service );
+}
+
+static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
{
- return NULL;
+ mlt_properties properties = mlt_properties_new();
+ 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( mlt_properties_get( properties, "mlt_service" ),
+ mlt_properties_get( properties, "resource" ) ) );
+ }
+ else
+ {
+ // Unspecified producer, use inigo
+ char *args[2] = { mlt_properties_get( properties, "resource" ), 0 };
+ 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 );
+
+ mlt_properties_inherit( mlt_service_properties( service ), properties );
+ mlt_properties_close( properties );
+
+ context_push_service( context, service );
}
+static void on_start_blank( deserialise_context context, const xmlChar *name, const xmlChar **atts)
+{
+ // Get the playlist from the stack
+ mlt_service service = context_pop_service( context );
+ mlt_position length = 0;
+
+ // Look for the length attribute
+ for ( ; atts != NULL && *atts != NULL; atts += 2 )
+ {
+ if ( strcmp( atts[0], "length" ) == 0 )
+ {
+ length = atoll( atts[1] );
+ break;
+ }
+ }
+
+ // Append a blank to the playlist
+ mlt_playlist_blank( MLT_PLAYLIST( service ), length - 1 );
+
+ // Push the playlist back onto the stack
+ context_push_service( context, service );
+}
+
+static void on_start_entry_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
+{
+ // Look for the producer attribute
+ for ( ; atts != NULL && *atts != NULL; atts += 2 )
+ {
+ if ( strcmp( atts[0], "producer" ) == 0 )
+ {
+ if ( mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL ) != NULL )
+ // Push the referenced producer onto the stack
+ context_push_service( context, MLT_SERVICE( mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL ) ) );
+ break;
+ }
+ }
+}
+
+static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
+{
+ 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 );
+
+ // Set the properties
+ for ( ; atts != NULL && *atts != NULL; atts += 2 )
+ mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
+
+ // 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" ) );
+
+ // 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 );
+ mlt_properties_close( properties );
+
+ // Get the parent producer from the stack
+ mlt_service tractor = context_pop_service( context );
+
+ if ( tractor != NULL )
+ {
+ // Connect the filter to the tractor
+ if ( strcmp( mlt_properties_get( mlt_service_properties( tractor ), "resource" ), "<tractor>" ) == 0 )
+ mlt_tractor_connect( MLT_TRACTOR( tractor ), service );
+
+ // Push the parent producer back onto the stack
+ context_push_service( context, tractor );
+ }
+
+ // If a producer alias is in the producer_map, get it
+ 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
+ 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 );
+}
+
+static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
+{
+ mlt_properties properties = mlt_properties_new();
+
+ // Get the producer from the stack
+ mlt_service producer = context_pop_service( context );
+
+ // Set the properties
+ for ( ; atts != NULL && *atts != NULL; atts += 2 )
+ mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
+
+ // Create the transition
+ mlt_service service = MLT_SERVICE( mlt_factory_transition( mlt_properties_get( properties, "mlt_service" ), NULL ) );
+
+ track_service( context->destructors, service, (mlt_destructor) mlt_transition_close );
+
+ // Propogate the properties
+ mlt_properties_inherit( mlt_service_properties( service ), properties );
+ mlt_properties_close( properties );
+
+ // Connect the filter to the producer
+ mlt_transition_connect( MLT_TRANSITION( service ), producer,
+ mlt_properties_get_int( mlt_service_properties( service ), "a_track" ),
+ mlt_properties_get_int( mlt_service_properties( service ), "b_track" ) );
+
+ // Get the tractor from the stack
+ mlt_service tractor = context_pop_service( context );
+
+ // Connect the tractor to the transition
+ mlt_tractor_connect( MLT_TRACTOR( tractor ), service );
+
+ // Push the tractor back onto the stack
+ context_push_service( context, tractor );
+
+ // Push the transition onto the stack
+ context_push_service( context, service );
+}
+
+static void on_end_multitrack( deserialise_context context, const xmlChar *name )
+{
+ // Get the producer (multitrack) from the stack
+ mlt_service producer = context_pop_service( context );
+
+ // Get the tractor from the stack
+ mlt_service service = context_pop_service( context );
+
+ // Connect the tractor to the producer
+ mlt_tractor_connect( MLT_TRACTOR( service ), producer );
+ mlt_properties_set_data( mlt_service_properties( service ), "multitrack",
+ MLT_MULTITRACK( producer ), 0, NULL, NULL );
+
+ // Push the tractor back onto the stack
+ context_push_service( context, service );
+
+ // Push the producer back onto the stack
+ context_push_service( context, producer );
+}
+
+static void on_end_playlist( deserialise_context context, const xmlChar *name )
+{
+ // Get the producer (playlist) from the stack
+ mlt_service producer = context_pop_service( context );
+
+ // Push the producer back onto the stack
+ context_push_service( context, producer );
+}
+
+static void on_end_track( deserialise_context context, const xmlChar *name )
+{
+ // Get the producer from the stack
+ mlt_service producer = context_pop_service( context );
+
+ // Get the multitrack from the stack
+ mlt_service service = context_pop_service( context );
+
+ // Set the track on the multitrack
+ mlt_multitrack_connect( MLT_MULTITRACK( service ),
+ MLT_PRODUCER( producer ),
+ context->track_count++ );
+
+ // Push the multitrack back onto the stack
+ context_push_service( context, service );
+}
+
+static void on_end_entry( deserialise_context context, const xmlChar *name )
+{
+ // Get the producer from the stack
+ mlt_service producer = context_pop_service( context );
+
+ // Get the playlist from the stack
+ mlt_service service = context_pop_service( context );
+
+ // Append the producer to the playlist
+ mlt_playlist_append_io( MLT_PLAYLIST( service ),
+ MLT_PRODUCER( producer ),
+ mlt_properties_get_position( mlt_service_properties( producer ), "in" ),
+ mlt_properties_get_position( mlt_service_properties( producer ), "out" ) );
+
+ // Push the playlist back onto the stack
+ 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;
+
+ if ( strcmp( name, "tractor" ) == 0 )
+ on_start_tractor( context, name, atts );
+ else if ( strcmp( name, "multitrack" ) == 0 )
+ on_start_multitrack( context, name, atts );
+ else if ( strcmp( name, "playlist" ) == 0 )
+ on_start_playlist( context, name, atts );
+ else if ( strcmp( name, "producer" ) == 0 )
+ on_start_producer( context, name, atts );
+ else if ( strcmp( name, "blank" ) == 0 )
+ on_start_blank( context, name, atts );
+ else if ( strcmp( name, "entry" ) == 0 || strcmp( name, "track" ) == 0 )
+ on_start_entry_track( context, name, atts );
+ else if ( strcmp( name, "filter" ) == 0 )
+ on_start_filter( context, name, atts );
+ else if ( strcmp( name, "transition" ) == 0 )
+ on_start_transition( context, name, atts );
+}
+
+static void on_end_element( void *ctx, const xmlChar *name )
+{
+ deserialise_context context = ( deserialise_context ) ctx;
+
+ if ( strcmp( name, "multitrack" ) == 0 )
+ on_end_multitrack( context, name );
+ else if ( strcmp( name, "playlist" ) == 0 )
+ on_end_playlist( context, name );
+ else if ( strcmp( name, "track" ) == 0 )
+ on_end_track( context, name );
+ else if ( strcmp( name, "entry" ) == 0 )
+ on_end_entry( context, name );
+ else if ( strcmp( name, "tractor" ) == 0 )
+ on_end_tractor( context, name );
+}
+
+
mlt_producer producer_westley_init( char *filename )
{
- int i;
- int track = 0;
- mlt_producer producer = NULL;
- mlt_playlist playlist = mlt_playlist_init( );
- mlt_properties group = mlt_properties_new( );
- mlt_properties properties = group;
- mlt_field field = mlt_field_init( );
- mlt_properties field_properties = mlt_field_properties( field );
- mlt_multitrack multitrack = mlt_field_multitrack( field );
+ 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( field_properties, "registered", 0 );
+ mlt_properties_set_int( context->destructors, "registered", 0 );
+ sax->startElement = on_start_element;
+ sax->endElement = on_end_element;
+
+ if ( !init )
+ {
+ xmlInitParser();
+ //init = 1;
+ }
- // Parse
- producer = parse_westley( filename );
-
- // TODO
+ xmlSAXUserParseFile( sax, context, filename );
+
+ // 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 );
- // Connect producer to playlist
- if ( producer != NULL )
- mlt_playlist_append( playlist, producer );
+ // make the returned service destroy the connected services
+ mlt_properties_set_data( properties, "__destructors__", context->destructors, 0, (mlt_destructor) mlt_properties_close, NULL );
- // We must have a producer at this point
- if ( mlt_playlist_count( playlist ) > 0 )
+ // 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
{
- // Connect multitrack to producer
- mlt_multitrack_connect( multitrack, mlt_playlist_producer( playlist ), track );
+ // Clean up
+ mlt_properties_close( properties );
}
- mlt_tractor tractor = mlt_field_tractor( field );
- mlt_producer prod = mlt_tractor_producer( tractor );
- mlt_properties props = mlt_tractor_properties( tractor );
- mlt_properties_set( mlt_producer_properties( prod ), "resource", filename );
- mlt_properties_set_data( props, "multitrack", multitrack, 0, NULL, NULL );
- mlt_properties_set_data( props, "field", field, 0, NULL, NULL );
- mlt_properties_set_data( props, "group", group, 0, NULL, NULL );
- mlt_properties_set_position( props, "length", mlt_producer_get_out( mlt_multitrack_producer( multitrack ) ) + 1 );
- mlt_producer_set_in_and_out( prod, 0, mlt_producer_get_out( mlt_multitrack_producer( multitrack ) ) );
- mlt_properties_set_double( props, "fps", mlt_producer_get_fps( mlt_multitrack_producer( multitrack ) ) );
-
- return mlt_tractor_producer( tractor );
+ free( context->stack_service );
+ mlt_properties_close( context->producer_map );
+ //free( context );
+ free( sax );
+ xmlCleanupParser();
+ xmlMemoryDump( );
+
+
+ return MLT_PRODUCER( service );
}
projects / melted / blobdiff