X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fmodules%2Fwestley%2Fproducer_westley.c;h=89ca817f04848d1e760763b8d1d9a3ce89b969ef;hb=1c5fe28f14d004d6d81728dc92bb32fc260990fb;hp=8873ca936a9cb45b82fde012728ab04f51784f2c;hpb=abc466844ef298c20f1530c1f287de40445762a4;p=melted diff --git a/src/modules/westley/producer_westley.c b/src/modules/westley/producer_westley.c index 8873ca9..89ca817 100644 --- a/src/modules/westley/producer_westley.c +++ b/src/modules/westley/producer_westley.c @@ -18,8 +18,10 @@ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -// TODO: destroy unreferenced producers - +// TODO: destroy unreferenced producers (they are currently destroyed +// when the returned producer is closed). +// TODO: determine why deserialise_context can not be released. + #include "producer_westley.h" #include #include @@ -27,6 +29,8 @@ #include #include +#include // for xmlCreateFileParserCtxt +#include #define STACK_SIZE 1000 @@ -38,6 +42,11 @@ struct deserialise_context_s mlt_properties destructors; char *property; mlt_properties producer_properties; + int is_value; + xmlDocPtr value_doc; + xmlNodePtr stack_node[ STACK_SIZE ]; + int stack_node_size; + xmlDocPtr entity_doc; }; typedef struct deserialise_context_s *deserialise_context; @@ -47,7 +56,7 @@ typedef struct deserialise_context_s *deserialise_context; static int context_push_service( deserialise_context this, mlt_service that ) { - int ret = this->stack_service_size >= STACK_SIZE; + int ret = this->stack_service_size >= STACK_SIZE - 1; if ( ret == 0 ) this->stack_service[ this->stack_service_size ++ ] = that; return ret; @@ -64,6 +73,29 @@ static mlt_service context_pop_service( deserialise_context this ) return result; } +/** Push a node. +*/ + +static int context_push_node( deserialise_context this, xmlNodePtr node ) +{ + int ret = this->stack_node_size >= STACK_SIZE - 1; + if ( ret == 0 ) + this->stack_node[ this->stack_node_size ++ ] = node; + return ret; +} + +/** Pop a node. +*/ + +static xmlNodePtr context_pop_node( deserialise_context this ) +{ + xmlNodePtr result = NULL; + if ( this->stack_node_size > 0 ) + result = this->stack_node[ -- this->stack_node_size ]; + return result; +} + + // Set the destructor on a new service static void track_service( mlt_properties properties, void *service, mlt_destructor destructor ) { @@ -73,6 +105,11 @@ static void track_service( mlt_properties properties, void *service, mlt_destruc mlt_properties_set_int( properties, "registered", ++ registered ); } + +// Forward declarations +static void on_end_track( deserialise_context context, const xmlChar *name ); +static void on_end_entry( deserialise_context context, const xmlChar *name ); + static void on_start_tractor( deserialise_context context, const xmlChar *name, const xmlChar **atts) { mlt_service service = mlt_tractor_service( mlt_tractor_init() ); @@ -91,6 +128,9 @@ static void on_start_tractor( deserialise_context context, const xmlChar *name, mlt_properties_set_position( properties, "length", length ); } + if ( mlt_properties_get( properties, "id" ) != NULL ) + mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL ); + context_push_service( context, service ); } @@ -106,6 +146,9 @@ static void on_start_multitrack( deserialise_context context, const xmlChar *nam 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 ); + context_push_service( context, service ); } @@ -121,6 +164,8 @@ static void on_start_playlist( deserialise_context context, const xmlChar *name, for ( ; atts != NULL && *atts != NULL; atts += 2 ) { mlt_properties_set( properties, ( char* )atts[0], ( char* )atts[1] ); + + // Out will be overwritten later as we append, so we need to save it if ( strcmp( atts[ 0 ], "out" ) == 0 ) mlt_properties_set( properties, "_westley.out", ( char* )atts[ 1 ] ); } @@ -146,7 +191,10 @@ static void on_start_blank( deserialise_context context, const xmlChar *name, co // Get the playlist from the stack mlt_service service = context_pop_service( context ); mlt_position length = 0; - + + if ( service == NULL ) + return; + // Look for the length attribute for ( ; atts != NULL && *atts != NULL; atts += 2 ) { @@ -166,15 +214,31 @@ static void on_start_blank( deserialise_context context, const xmlChar *name, co static void on_start_entry_track( deserialise_context context, const xmlChar *name, const xmlChar **atts) { - // Look for the producer attribute + // Use a dummy service to hold properties to allow arbitrary nesting + mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) ); + mlt_service_init( service, NULL ); + + // Push the dummy service onto the stack + context_push_service( context, service ); + + if ( strcmp( name, "entry" ) == 0 ) + mlt_properties_set( mlt_service_properties( service ), "resource", "" ); + else + mlt_properties_set( mlt_service_properties( service ), "resource", "" ); + for ( ; atts != NULL && *atts != NULL; atts += 2 ) { - if ( strcmp( atts[0], "producer" ) == 0 ) + mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] ); + + // Look for the producer attribute + 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; + else + // Remove the dummy service to cause end element failure + context_pop_service( context ); } } } @@ -220,33 +284,118 @@ static void on_start_property( deserialise_context context, const xmlChar *name, if ( context->property != NULL && value != NULL ) mlt_properties_set( properties, context->property, value ); + + // Tell parser to collect any further nodes for serialisation + context->is_value = 1; +} + + +/** This function adds a producer to a playlist or multitrack when + there is no entry or track element. +*/ + +static int add_producer( deserialise_context context, mlt_service service, mlt_position in, mlt_position out ) +{ + // Get the parent producer + mlt_service producer = context_pop_service( context ); + if ( producer != NULL ) + { + char *resource = mlt_properties_get( mlt_service_properties( producer ), "resource" ); + + // Put the parent producer back + context_push_service( context, producer ); + + // If the parent producer is a multitrack or playlist (not a track or entry) + if ( resource && ( strcmp( resource, "" ) == 0 || + strcmp( resource, "" ) == 0 ) ) + { + if ( strcmp( resource, "" ) == 0 ) + { + // Append this producer to the playlist + mlt_playlist_append_io( MLT_PLAYLIST( producer ), + MLT_PRODUCER( service ), in, out ); + } + else + { + mlt_properties properties = mlt_service_properties( service ); + + // Set this producer on the multitrack + mlt_multitrack_connect( MLT_MULTITRACK( producer ), + MLT_PRODUCER( service ), + mlt_multitrack_count( MLT_MULTITRACK( producer ) ) ); + + // Set the hide state of the track producer + char *hide_s = mlt_properties_get( properties, "hide" ); + if ( hide_s != NULL ) + { + if ( strcmp( hide_s, "video" ) == 0 ) + mlt_properties_set_int( properties, "hide", 1 ); + else if ( strcmp( hide_s, "audio" ) == 0 ) + mlt_properties_set_int( properties, "hide", 2 ); + else if ( strcmp( hide_s, "both" ) == 0 ) + mlt_properties_set_int( properties, "hide", 3 ); + } + + } + // Normally, the enclosing entry or track will pop this service off + // In its absence we do not push it on. + return 1; + } + } + return 0; } static void on_end_multitrack( deserialise_context context, const xmlChar *name ) { - // Get the producer (multitrack) from the stack + // Get the multitrack from the stack mlt_service producer = context_pop_service( context ); + if ( producer == NULL ) + return; // Get the tractor from the stack mlt_service service = context_pop_service( context ); - - // Connect the tractor to the producer + + // Create a tractor if one does not exist + char *resource = NULL; + if ( service != NULL ) + resource = mlt_properties_get( mlt_service_properties( service ), "resource" ); + if ( service == NULL || resource == NULL || strcmp( resource, "" ) ) + { + // Put the anonymous service back onto the stack! + context_push_service( context, service ); + + service = mlt_tractor_service( mlt_tractor_init() ); + track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close ); + + // Inherit the producer's properties + mlt_properties properties = mlt_service_properties( service ); + mlt_properties_set_position( properties, "length", mlt_producer_get_out( MLT_PRODUCER( producer ) ) + 1 ); + mlt_producer_set_in_and_out( MLT_PRODUCER( service ), 0, mlt_producer_get_out( MLT_PRODUCER( producer ) ) ); + mlt_properties_set_double( properties, "fps", mlt_producer_get_fps( MLT_PRODUCER( producer ) ) ); + } + + // Connect the tractor to the multitrack 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 + // See if the producer should be added to a playlist or multitrack + add_producer( context, service, 0, mlt_producer_get_out( MLT_PRODUCER( producer ) ) ); + + // Always push the multitrack back onto the stack for filters and transitions context_push_service( context, producer ); + + // Always push the tractor back onto the stack for filters and transitions + context_push_service( context, service ); } static void on_end_playlist( deserialise_context context, const xmlChar *name ) { // Get the playlist from the stack - mlt_service service = context_pop_service( context ); - mlt_properties properties = mlt_service_properties( service ); + mlt_service producer = context_pop_service( context ); + if ( producer == NULL ) + return; + mlt_properties properties = mlt_service_properties( producer ); mlt_position in = mlt_properties_get_position( properties, "in" ); mlt_position out; @@ -259,68 +408,171 @@ static void on_end_playlist( deserialise_context context, const xmlChar *name ) if ( mlt_properties_get_position( properties, "length" ) < out ) mlt_properties_set_position( properties, "length", out + 1 ); - mlt_producer_set_in_and_out( MLT_PRODUCER( service ), in, out ); - - // Push the playlist back onto the stack - context_push_service( context, service ); + mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out ); + + // See if the playlist should be added to a playlist or multitrack + if ( add_producer( context, producer, in, out ) == 0 ) + + // Otherwise, push the playlist 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 ); + if ( producer == NULL ) + return; + mlt_properties producer_props = mlt_service_properties( producer ); + + // See if the producer is a tractor + char *resource = mlt_properties_get( producer_props, "resource" ); + if ( resource && strcmp( resource, "" ) == 0 ) + // If so chomp its producer + context_pop_service( context ); + + // Get the dummy track service from the stack + mlt_service track = context_pop_service( context ); + if ( track == NULL || strcmp( mlt_properties_get( mlt_service_properties( track ), "resource" ), "" ) ) + { + context_push_service( context, producer ); + return; + } + mlt_properties track_props = mlt_service_properties( track ); // Get the multitrack from the stack mlt_service service = context_pop_service( context ); - + if ( service == NULL ) + { + context_push_service( context, producer ); + return; + } + // Set the track on the multitrack mlt_multitrack_connect( MLT_MULTITRACK( service ), MLT_PRODUCER( producer ), mlt_multitrack_count( MLT_MULTITRACK( service ) ) ); + // Set producer i/o if specified + if ( mlt_properties_get( track_props, "in" ) != NULL || + mlt_properties_get( track_props, "out" ) != NULL ) + { + mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), + mlt_properties_get_position( track_props, "in" ), + mlt_properties_get_position( track_props, "out" ) ); + } + + // Set the hide state of the track producer + char *hide_s = mlt_properties_get( track_props, "hide" ); + if ( hide_s != NULL ) + { + if ( strcmp( hide_s, "video" ) == 0 ) + mlt_properties_set_int( producer_props, "hide", 1 ); + else if ( strcmp( hide_s, "audio" ) == 0 ) + mlt_properties_set_int( producer_props, "hide", 2 ); + else if ( strcmp( hide_s, "both" ) == 0 ) + mlt_properties_set_int( producer_props, "hide", 3 ); + } + // Push the multitrack back onto the stack context_push_service( context, service ); + + mlt_service_close( track ); } static void on_end_entry( deserialise_context context, const xmlChar *name ) { // Get the producer from the stack mlt_service producer = context_pop_service( context ); + if ( producer == NULL ) + return; + + // See if the producer is a tractor + char *resource = mlt_properties_get( mlt_service_properties( producer ), "resource" ); + if ( resource && strcmp( resource, "" ) == 0 ) + // If so chomp its producer + context_pop_service( context ); + + // Get the dummy entry service from the stack + mlt_service entry = context_pop_service( context ); + if ( entry == NULL || strcmp( mlt_properties_get( mlt_service_properties( entry ), "resource" ), "" ) ) + { + context_push_service( context, producer ); + return; + } // Get the playlist from the stack mlt_service service = context_pop_service( context ); + if ( service == NULL ) + { + context_push_service( context, producer ); + return; + } // Append the producer to the playlist - // TODO: THIS IS NOT CORRECT - an entry SHOULD have in/out points of its own - mlt_playlist_append_io( MLT_PLAYLIST( service ), - MLT_PRODUCER( producer ), 0, - mlt_properties_get_position( mlt_service_properties( producer ), "out" ) - mlt_properties_get_position( mlt_service_properties( producer ), "in" ) + 1 ); + if ( mlt_properties_get( mlt_service_properties( entry ), "in" ) != NULL || + mlt_properties_get( mlt_service_properties( entry ), "out" ) != NULL ) + { + mlt_playlist_append_io( MLT_PLAYLIST( service ), + MLT_PRODUCER( producer ), + mlt_properties_get_position( mlt_service_properties( entry ), "in" ), + mlt_properties_get_position( mlt_service_properties( entry ), "out" ) ); + } + else + { + mlt_playlist_append( MLT_PLAYLIST( service ), MLT_PRODUCER( producer ) ); + } // Push the playlist back onto the stack context_push_service( context, service ); + + mlt_service_close( entry ); } 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 ) ); - // Get the tractor mlt_service tractor = context_pop_service( context ); - multitrack = mlt_properties_get_data( mlt_service_properties( tractor ), "multitrack", NULL ); - - // 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 ) ); + if ( tractor == NULL ) + return; + + // Get the tractor's multitrack + mlt_producer multitrack = mlt_properties_get_data( mlt_service_properties( tractor ), "multitrack", NULL ); + if ( multitrack != NULL ) + { + // Inherit the producer's properties + mlt_properties properties = mlt_producer_properties( MLT_PRODUCER( tractor ) ); + 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 ) ); + } - // Push the playlist back onto the stack - context_push_service( context, tractor ); + // See if the tractor should be added to a playlist or multitrack + if ( add_producer( context, tractor, 0, mlt_producer_get_out( MLT_PRODUCER( tractor ) ) ) == 0 ) + + // Otherwise, push the tractor back onto the stack + context_push_service( context, tractor ); } static void on_end_property( deserialise_context context, const xmlChar *name ) { + // Tell parser to stop building a tree + context->is_value = 0; + + // See if there is a xml tree for the value + if ( context->property != NULL && context->value_doc != NULL ) + { + xmlChar *value; + int size; + + // Serialise the tree to get value + xmlDocDumpMemory( context->value_doc, &value, &size ); + mlt_properties_set( context->producer_properties, context->property, value ); + xmlFree( value ); + xmlFreeDoc( context->value_doc ); + context->value_doc = NULL; + } + // Close this property handling free( context->property ); context->property = NULL; @@ -334,33 +586,105 @@ static void on_end_producer( deserialise_context context, const xmlChar *name ) if ( properties == NULL ) return; - // Instatiate the producer - service = MLT_SERVICE( mlt_factory_producer( "fezzik", mlt_properties_get( properties, "resource" ) ) ); + char *resource = mlt_properties_get( properties, "resource" ); + // Let Kino-SMIL src be a synonym for resource + if ( resource == NULL ) + resource = mlt_properties_get( properties, "src" ); - if ( service == NULL && mlt_properties_get( properties, "mlt_service" ) != NULL ) + // Instantiate the producer + 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" ) ) ); + service = MLT_SERVICE( mlt_factory_producer( "fezzik", mlt_properties_get( properties, "mlt_service" ) ) ); } - + if ( service == NULL && resource != NULL ) + { + char *root = mlt_properties_get( context->producer_map, "_root" ); + char *full_resource = malloc( strlen( root ) + strlen( resource ) + 1 ); + if ( resource[ 0 ] != '/' ) + { + strcpy( full_resource, root ); + strcat( full_resource, resource ); + } + else + { + strcpy( full_resource, resource ); + } + service = MLT_SERVICE( mlt_factory_producer( "fezzik", full_resource ) ); + free( full_resource ); + } + if ( service == NULL ) + return; 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 ); + // Handle in/out properties separately + mlt_position in = -1; + mlt_position out = -1; + + // Get in + if ( mlt_properties_get( properties, "in" ) != NULL ) + in = mlt_properties_get_position( properties, "in" ); + // Let Kino-SMIL clipBegin be a synonym for in + if ( mlt_properties_get( properties, "clipBegin" ) != NULL ) + in = mlt_properties_get_position( properties, "clipBegin" ); + // Get out + if ( mlt_properties_get( properties, "out" ) != NULL ) + out = mlt_properties_get_position( properties, "out" ); + // Let Kino-SMIL clipEnd be a synonym for out + if ( mlt_properties_get( properties, "clipEnd" ) != NULL ) + out = mlt_properties_get_position( properties, "clipEnd" ); + + // Remove in and out + mlt_properties_set( properties, "in", NULL ); + mlt_properties_set( properties, "out", NULL ); + mlt_properties_inherit( mlt_service_properties( service ), properties ); mlt_properties_close( properties ); context->producer_properties = NULL; - properties = mlt_service_properties( service ); - // Set in and out - mlt_producer_set_in_and_out( MLT_PRODUCER( service ), - mlt_properties_get_position( properties, "in" ), - mlt_properties_get_position( properties, "out" ) ); - - // Push the new producer onto the stack - context_push_service( context, service ); + // See if the producer should be added to a playlist or multitrack + if ( add_producer( context, service, in, out ) == 0 ) + { + // Otherwise, set in and out on... + if ( in != -1 || out != -1 ) + { + // Get the parent service + mlt_service parent = context_pop_service( context ); + if ( parent != NULL ) + { + // Get the parent properties + properties = mlt_service_properties( parent ); + + char *resource = mlt_properties_get( properties, "resource" ); + + // Put the parent producer back + context_push_service( context, parent ); + + // If the parent is a track or entry + if ( resource && ( strcmp( resource, "" ) == 0 ) ) + { + mlt_properties_set_position( properties, "in", in ); + mlt_properties_set_position( properties, "out", out ); + } + else + { + // Otherwise, set in and out on producer directly + mlt_producer_set_in_and_out( MLT_PRODUCER( service ), in, out ); + } + } + else + { + // Otherwise, set in and out on producer directly + mlt_producer_set_in_and_out( MLT_PRODUCER( service ), in, out ); + } + } + + // Push the producer onto the stack + context_push_service( context, service ); + } } static void on_end_filter( deserialise_context context, const xmlChar *name ) @@ -372,14 +696,31 @@ static void on_end_filter( deserialise_context context, const xmlChar *name ) char *id; char key[11]; key[ 10 ] = '\0'; - + mlt_service tractor = NULL; + // Get the producer from the stack mlt_service producer = context_pop_service( context ); + if ( producer == NULL ) + return; + + // See if the producer is a tractor + char *resource = mlt_properties_get( mlt_service_properties( producer ), "resource" ); + if ( resource != NULL && strcmp( resource, "" ) == 0 ) + { + // If so, then get the next producer + tractor = producer; + producer = context_pop_service( context ); + } + //fprintf( stderr, "connecting filter to %s\n", mlt_properties_get( mlt_service_properties( producer ), "resource" ) ); // Create the filter mlt_service service = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) ); - + if ( service == NULL ) + { + context_push_service( context, producer ); + return; + } track_service( context->destructors, service, (mlt_destructor) mlt_filter_close ); // Connect the filter to the producer @@ -398,27 +739,11 @@ static void on_end_filter( deserialise_context context, const xmlChar *name ) context->producer_properties = NULL; properties = mlt_service_properties( service ); - // Set in and out -//fprintf( stderr, "setting filter in %lld out %lld\n", mlt_properties_get_position( properties, "in" ), mlt_properties_get_position( properties, "out" ) ); + // Set in and out again due to inheritance mlt_filter_set_in_and_out( MLT_FILTER( service ), mlt_properties_get_position( properties, "in" ), mlt_properties_get_position( properties, "out" ) ); - // Get the parent producer from the stack - mlt_service tractor = context_pop_service( context ); - - if ( tractor != NULL ) - { -//fprintf( stderr, "connecting tractor %s to filter\n", mlt_properties_get( mlt_service_properties( tractor ), "resource" ) ); - // Connect the tractor to the filter - if ( strcmp( mlt_properties_get( mlt_service_properties( tractor ), "resource" ), "" ) == 0 ) - mlt_tractor_connect( MLT_TRACTOR( tractor ), service ); - - // Push the parent producer back onto the stack - context_push_service( context, tractor ); - } - -//fprintf( stderr, "setting filter in %lld out %lld\n", mlt_properties_get_position( properties, "in" ), mlt_properties_get_position( properties, "out" ) ); // 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 ) @@ -432,24 +757,48 @@ static void on_end_filter( deserialise_context context, const xmlChar *name ) // 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 ); + + if ( tractor != NULL ) + { + // Connect the tractor to the filter + mlt_tractor_connect( MLT_TRACTOR( tractor ), service ); + // Push the tractor back onto the stack + context_push_service( context, tractor ); + } } static void on_end_transition( deserialise_context context, const xmlChar *name ) { + mlt_service tractor = NULL; mlt_properties properties = context->producer_properties; if ( properties == NULL ) return; // Get the producer from the stack mlt_service producer = context_pop_service( context ); + if ( producer == NULL ) + return; + // See if the producer is a tractor + char *resource = mlt_properties_get( mlt_service_properties( producer ), "resource" ); + if ( resource != NULL && strcmp( resource, "" ) == 0 ) + { + // If so, then get the next producer + tractor = producer; + producer = context_pop_service( context ); + } + // Create the transition mlt_service service = MLT_SERVICE( mlt_factory_transition( mlt_properties_get( properties, "mlt_service" ), NULL ) ); - + if ( service == NULL ) + { + context_push_service( context, producer ); + return; + } track_service( context->destructors, service, (mlt_destructor) mlt_transition_close ); // Propogate the properties @@ -458,40 +807,63 @@ static void on_end_transition( deserialise_context context, const xmlChar *name context->producer_properties = NULL; properties = mlt_service_properties( service ); - // Set in and out + // Set in and out again due to inheritance mlt_transition_set_in_and_out( MLT_TRANSITION( service ), mlt_properties_get_position( properties, "in" ), mlt_properties_get_position( properties, "out" ) ); - // Connect the filter to the producer + // Connect the transition to the producer mlt_transition_connect( MLT_TRANSITION( service ), producer, mlt_properties_get_int( properties, "a_track" ), mlt_properties_get_int( properties, "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 ); + + if ( tractor != NULL ) + { + // 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 ); + } } static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts) { - deserialise_context context = ( deserialise_context ) ctx; + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); - if ( strcmp( name, "tractor" ) == 0 ) + // Build a tree from nodes within a property value + if ( context->is_value == 1 ) + { + xmlNodePtr node = xmlNewNode( NULL, name ); + + if ( context->value_doc == NULL ) + { + // Start a new tree + context->value_doc = xmlNewDoc( "1.0" ); + xmlDocSetRootElement( context->value_doc, node ); + } + else + { + // Append child to tree + xmlAddChild( context->stack_node[ context->stack_node_size - 1 ], node ); + } + context_push_node( context, node ); + + // Set the attributes + for ( ; atts != NULL && *atts != NULL; atts += 2 ) + xmlSetProp( node, atts[ 0 ], atts[ 1 ] ); + } + else 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 ) + else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 ) on_start_playlist( context, name, atts ); - else if ( strcmp( name, "producer" ) == 0 ) + else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 ) on_start_producer( context, name, atts ); else if ( strcmp( name, "blank" ) == 0 ) on_start_blank( context, name, atts ); @@ -507,11 +879,14 @@ static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **at static void on_end_element( void *ctx, const xmlChar *name ) { - deserialise_context context = ( deserialise_context ) ctx; + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); - if ( strcmp( name, "multitrack" ) == 0 ) + if ( context->is_value == 1 && strcmp( name, "property" ) != 0 ) + context_pop_node( context ); + else if ( strcmp( name, "multitrack" ) == 0 ) on_end_multitrack( context, name ); - else if ( strcmp( name, "playlist" ) == 0 ) + else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 ) on_end_playlist( context, name ); else if ( strcmp( name, "track" ) == 0 ) on_end_track( context, name ); @@ -521,7 +896,7 @@ static void on_end_element( void *ctx, const xmlChar *name ) on_end_tractor( context, name ); else if ( strcmp( name, "property" ) == 0 ) on_end_property( context, name ); - else if ( strcmp( name, "producer" ) == 0 ) + else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 ) on_end_producer( context, name ); else if ( strcmp( name, "filter" ) == 0 ) on_end_filter( context, name ); @@ -531,51 +906,121 @@ static void on_end_element( void *ctx, const xmlChar *name ) static void on_characters( void *ctx, const xmlChar *ch, int len ) { - deserialise_context context = ( deserialise_context ) ctx; + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); char *value = calloc( len + 1, 1 ); value[ len ] = 0; strncpy( value, (const char*) ch, len ); + + if ( context->stack_node_size > 0 ) + xmlNodeAddContent( context->stack_node[ context->stack_node_size - 1 ], ( xmlChar* )value ); - if ( context->property != NULL && context->producer_properties != NULL ) + else if ( context->property != NULL && context->producer_properties != NULL ) mlt_properties_set( context->producer_properties, context->property, value ); free( value); } +// The following 3 facilitate entity substitution in the SAX parser +static void on_internal_subset( void *ctx, const xmlChar* name, + const xmlChar* publicId, const xmlChar* systemId ) +{ + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); + + xmlCreateIntSubset( context->entity_doc, name, publicId, systemId ); +} + +static void on_entity_declaration( void *ctx, const xmlChar* name, int type, + const xmlChar* publicId, const xmlChar* systemId, xmlChar* content) +{ + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); + + xmlAddDocEntity( context->entity_doc, name, type, publicId, systemId, content ); +} + +xmlEntityPtr on_get_entity( void *ctx, const xmlChar* name ) +{ + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); + + return xmlGetDocEntity( context->entity_doc, 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; - + struct _xmlParserCtxt *xmlcontext; + int well_formed = 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; - sax->characters = on_characters; - if ( !init ) + // We need the directory prefix which was used for the westley + mlt_properties_set( context->producer_map, "_root", "" ); + if ( strchr( filename, '/' ) ) { - xmlInitParser(); - //init = 1; + char *root = NULL; + mlt_properties_set( context->producer_map, "_root", filename ); + root = mlt_properties_get( context->producer_map, "_root" ); + *( strrchr( root, '/' ) + 1 ) = '\0'; } - xmlSAXUserParseFile( sax, context, filename ); - - // Need the complete producer list for various reasons - properties = context->destructors; + // Setup SAX callbacks + sax->startElement = on_start_element; + sax->endElement = on_end_element; + sax->characters = on_characters; + sax->cdataBlock = on_characters; + sax->internalSubset = on_internal_subset; + sax->entityDecl = on_entity_declaration; + sax->getEntity = on_get_entity; + + // Setup libxml2 SAX parsing + xmlInitParser(); + xmlSubstituteEntitiesDefault( 1 ); + // This is used to facilitate entity substitution in the SAX parser + context->entity_doc = xmlNewDoc( "1.0" ); + xmlcontext = xmlCreateFileParserCtxt( filename ); + xmlcontext->sax = sax; + xmlcontext->_private = ( void* )context; + + // Parse + xmlParseDocument( xmlcontext ); + well_formed = xmlcontext->wellFormed; + + // Cleanup after parsing + xmlFreeDoc( context->entity_doc ); + free( sax ); + xmlcontext->sax = NULL; + xmlcontext->_private = NULL; + xmlFreeParserCtxt( xmlcontext ); + xmlMemoryDump( ); // for debugging // Get the last producer on the stack mlt_service service = context_pop_service( context ); + if ( well_formed && service != NULL ) + { + // Verify it is a producer service (mlt_type="mlt_producer") + // (producer, playlist, multitrack) + char *type = mlt_properties_get( mlt_service_properties( service ), "mlt_type" ); + if ( type == NULL || ( strcmp( type, "mlt_producer" ) != 0 ) ) + service = NULL; + } - // Do we actually have a producer here? - if ( service != NULL ) + if ( well_formed && service != NULL ) { + // Need the complete producer list for various reasons + properties = context->destructors; + // 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 -- ) { @@ -602,18 +1047,16 @@ mlt_producer producer_westley_init( char *filename ) } else { + // Return null if not well formed + service = NULL; + // Clean up - mlt_properties_close( properties ); + mlt_properties_close( context->destructors ); } free( context->stack_service ); mlt_properties_close( context->producer_map ); //free( context ); - free( sax ); - xmlCleanupParser(); - xmlMemoryDump( ); - return MLT_PRODUCER( service ); } -