X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fmodules%2Fwestley%2Fproducer_westley.c;h=e32b62ba6d7a25e8d1d9df49ee017bca2e578f36;hb=8de8411c3af4b5746e9040a67e928364be9ac058;hp=6616f3c9eeffe32a0149bbd8d369a508366ea8d0;hpb=520454d526bdcd58f1ac6ab7532dc2529b822808;p=melted diff --git a/src/modules/westley/producer_westley.c b/src/modules/westley/producer_westley.c index 6616f3c..e32b62b 100644 --- a/src/modules/westley/producer_westley.c +++ b/src/modules/westley/producer_westley.c @@ -1,5 +1,5 @@ /* - * 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 * @@ -18,61 +18,1289 @@ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +// TODO: destroy unreferenced producers (they are currently destroyed +// when the returned producer is closed). + #include "producer_westley.h" #include #include #include #include +#include #include +#include // for xmlCreateFileParserCtxt +#include + +#define STACK_SIZE 1000 +#define BRANCH_SIG_LEN 4000 + +#undef DEBUG +#ifdef DEBUG +extern xmlDocPtr westley_make_doc( mlt_service service ); +#endif -static mlt_producer parse_westley( char *file ) +struct deserialise_context_s { - return NULL; -} + mlt_service stack_service[ STACK_SIZE ]; + int stack_service_size; + mlt_properties producer_map; + 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; + int entity_is_replace; + int depth; + int branch[ STACK_SIZE ]; + const xmlChar *publicId; + const xmlChar *systemId; + mlt_properties params; +}; +typedef struct deserialise_context_s *deserialise_context; -mlt_producer producer_westley_init( char *filename ) +/** Convert the numerical current branch address to a dot-delimited string. +*/ +static char *serialise_branch( deserialise_context this, char *s ) { 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 ); + + s[0] = 0; + for ( i = 0; i < this->depth; i++ ) + { + int len = strlen( s ); + snprintf( s + len, BRANCH_SIG_LEN - len, "%d.", this->branch[ i ] ); + } + return s; +} - // We need to track the number of registered filters - mlt_properties_set_int( field_properties, "registered", 0 ); +/** Push a service. +*/ + +static int context_push_service( deserialise_context this, mlt_service that ) +{ + int ret = this->stack_service_size >= STACK_SIZE - 1; + if ( ret == 0 ) + { + this->stack_service[ this->stack_service_size++ ] = that; + + // Record the tree branch on which this service lives + if ( mlt_properties_get( mlt_service_properties( that ), "_westley_branch" ) == NULL ) + { + char s[ BRANCH_SIG_LEN ]; + mlt_properties_set( mlt_service_properties( that ), "_westley_branch", serialise_branch( this, s ) ); + } + } + 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; +} + +/** 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 ) +{ + 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 ); +} + + +// Prepend the property value with the server root +static inline void qualify_property( deserialise_context context, mlt_properties properties, char *name ) +{ + char *resource = mlt_properties_get( properties, name ); + if ( resource != NULL ) + { + // Qualify file name properties + char *root = mlt_properties_get( context->producer_map, "_root" ); + if ( root != NULL ) + { + 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 ); + } + mlt_properties_set( properties, name, full_resource ); + free( full_resource ); + } + } +} + + +// 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() ); + 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 ); + } + + 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 ); +} + +static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts) +{ + mlt_service service = mlt_multitrack_service( mlt_multitrack_init() ); + mlt_properties properties = mlt_service_properties( service ); + + track_service( context->destructors, service, (mlt_destructor) mlt_multitrack_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 ); + + 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] ); + + // 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 ] ); + } + + 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 ); +} + +static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts) +{ + mlt_properties properties = context->producer_properties = mlt_properties_new(); + + for ( ; atts != NULL && *atts != NULL; atts += 2 ) + { + mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] ); + } +} + +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; + + if ( service == NULL ) + return; + + // 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 ); +} - // Parse - producer = parse_westley( filename ); - - // TODO +static void on_start_entry_track( deserialise_context context, const xmlChar *name, const xmlChar **atts) +{ + // 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 ) + { + 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 ) ) ); + else + // Remove the dummy service to cause end element failure + context_pop_service( context ); + } + } +} + +static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts) +{ + mlt_properties properties = context->producer_properties = mlt_properties_new(); + + // Set the properties + for ( ; atts != NULL && *atts != NULL; atts += 2 ) + mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] ); +} + +static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts) +{ + mlt_properties properties = context->producer_properties = mlt_properties_new(); + + // Set the properties + for ( ; atts != NULL && *atts != NULL; atts += 2 ) + mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] ); +} + +static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts) +{ + mlt_properties properties = context->producer_properties; + char *value = NULL; + + if ( properties == NULL ) + return; + + // Set the properties + for ( ; atts != NULL && *atts != NULL; atts += 2 ) + { + if ( strcmp( atts[ 0 ], "name" ) == 0 ) + { + context->property = strdup( atts[ 1 ] ); + } + else if ( strcmp( atts[ 0 ], "value" ) == 0 ) + { + value = (char*) atts[ 1 ]; + } + } + + if ( context->property != NULL && value != NULL ) + mlt_properties_set( properties, context->property, value ); - // Connect producer to playlist + // 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 ) - mlt_playlist_append( playlist, producer ); + { + char current_branch[ BRANCH_SIG_LEN ]; + char *service_branch = mlt_properties_get( mlt_service_properties( producer ), "_westley_branch" ); + + // Validate the producer from the stack is an ancestor and not predecessor + serialise_branch( context, current_branch ); + if ( service_branch != NULL && strncmp( service_branch, current_branch, strlen( service_branch ) ) == 0 ) + { + 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 ) ) + { +//printf( "add_producer: current branch %s service branch %s (%d)\n", current_branch, service_branch, strncmp( service_branch, current_branch, strlen( service_branch ) ) ); + 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 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 ); + + // 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, "" ) ) + { +//printf("creating a tractor\n"); + char current_branch[ BRANCH_SIG_LEN ]; + + // Put the anonymous service back onto the stack! + if ( service != NULL ) + context_push_service( context, service ); + + // Fabricate the tractor + 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 ) ) ); + + mlt_properties_set( properties, "_westley_branch", serialise_branch( context, current_branch ) ); + } + + // 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 ); + + // See if the tractor 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 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; + + if ( mlt_properties_get( properties, "_westley.out" ) != NULL ) + out = mlt_properties_get_position( properties, "_westley.out" ); + else + out = mlt_properties_get_position( properties, "length" ) - 1; + + if ( mlt_properties_get_position( properties, "length" ) < out ) + mlt_properties_set_position( properties, "length", out + 1 ); + + 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 + 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 the tractor + mlt_service tractor = context_pop_service( context ); + 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 ) ); + } + + // 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; +} + +static void on_end_producer( deserialise_context context, const xmlChar *name ) +{ + mlt_properties properties = context->producer_properties; + mlt_service service = NULL; + + if ( properties == NULL ) + return; + + qualify_property( context, properties, "resource" ); + char *resource = mlt_properties_get( properties, "resource" ); + // Let Kino-SMIL src be a synonym for resource + if ( resource == NULL ) + { + qualify_property( context, properties, "src" ); + resource = mlt_properties_get( properties, "src" ); + } + + // Instantiate the producer + if ( mlt_properties_get( properties, "mlt_service" ) != NULL ) + { + char temp[ 1024 ]; + strncpy( temp, mlt_properties_get( properties, "mlt_service" ), 1024 ); + if ( resource != NULL ) + { + strcat( temp, ":" ); + strncat( temp, resource, 1023 - strlen( temp ) ); + } + service = MLT_SERVICE( mlt_factory_producer( "fezzik", temp ) ); + } + if ( service == NULL && resource != NULL ) + { + service = MLT_SERVICE( mlt_factory_producer( "fezzik", 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; + + // 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 ) +{ + mlt_properties properties = context->producer_properties; + if ( properties == NULL ) + return; + + 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 + 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 + qualify_property( context, properties, "resource" ); + qualify_property( context, properties, "luma" ); + qualify_property( context, properties, "luma.resource" ); + qualify_property( context, properties, "composite.luma" ); + qualify_property( context, properties, "producer.resource" ); + 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 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" ) ); + + // 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 ); + + 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 + qualify_property( context, properties, "resource" ); + qualify_property( context, properties, "luma" ); + qualify_property( context, properties, "luma.resource" ); + qualify_property( context, properties, "composite.luma" ); + qualify_property( context, properties, "producer.resource" ); + 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 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 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" ) ); + + // 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) +{ + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); + +//printf("on_start_element: %s\n", name ); + context->branch[ context->depth ] ++; + context->depth ++; + + // 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 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 ) + on_start_playlist( context, name, atts ); + 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 ); + 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 ); + else if ( strcmp( name, "property" ) == 0 ) + on_start_property( context, name, atts ); +} + +static void on_end_element( void *ctx, const xmlChar *name ) +{ + struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx; + deserialise_context context = ( deserialise_context )( xmlcontext->_private ); + +//printf("on_end_element: %s\n", name ); + 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 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 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 ); + else if ( strcmp( name, "property" ) == 0 ) + on_end_property( context, name ); + 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 ); + else if ( strcmp( name, "transition" ) == 0 ) + on_end_transition( context, name ); + + context->branch[ context->depth ] = 0; + context->depth --; +} + +static void on_characters( void *ctx, const xmlChar *ch, int len ) +{ + 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 ); + + // libxml2 generates an on_characters immediately after a get_entity within + // an element value, and we ignore it because it is called again during + // actual substitution. + else if ( context->property != NULL && context->producer_properties != NULL + && context->entity_is_replace == 0 ) + { + char *s = mlt_properties_get( context->producer_properties, context->property ); + if ( s != NULL ) + { + // Append new text to existing content + char *new = calloc( strlen( s ) + len + 1, 1 ); + strcat( new, s ); + strcat( new, value ); + mlt_properties_set( context->producer_properties, context->property, new ); + free( new ); + } + else + mlt_properties_set( context->producer_properties, context->property, value ); + } + context->entity_is_replace = 0; + + free( value); +} + +/** Convert parameters parsed from resource into entity declarations. +*/ +static void params_to_entities( deserialise_context context ) +{ + if ( context->params != NULL ) + { + int i; + + // Add our params as entitiy declarations + for ( i = 0; i < mlt_properties_count( context->params ); i++ ) + { + xmlChar *name = ( xmlChar* )mlt_properties_get_name( context->params, i ); + xmlAddDocEntity( context->entity_doc, name, XML_INTERNAL_GENERAL_ENTITY, + context->publicId, context->systemId, ( xmlChar* )mlt_properties_get( context->params, name ) ); + } - // We must have a producer at this point - if ( mlt_playlist_count( playlist ) > 0 ) + // Flag completion + mlt_properties_close( context->params ); + context->params = NULL; + } +} + +// 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 ); + + context->publicId = publicId; + context->systemId = systemId; + xmlCreateIntSubset( context->entity_doc, name, publicId, systemId ); + + // Override default entities with our parameters + params_to_entities( context ); +} + +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 ); + xmlEntityPtr e = NULL; + + // Setup for entity declarations if not ready + if ( xmlGetIntSubset( context->entity_doc ) == NULL ) { - // Connect multitrack to producer - mlt_multitrack_connect( multitrack, mlt_playlist_producer( playlist ), track ); + xmlCreateIntSubset( context->entity_doc, "westley", "", "" ); + context->publicId = ""; + context->systemId = ""; } - 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 ) ) ); + // Add our parameters if not already + params_to_entities( context ); + + e = xmlGetDocEntity( context->entity_doc, name ); + + // Send signal to on_characters that an entity substitutin is pending + if ( e != NULL ) + context->entity_is_replace = 1; + + return e; +} - return mlt_tractor_producer( tractor ); +/** Convert a hexadecimal character to its value. +*/ +static int tohex( char p ) +{ + return isdigit( p ) ? p - '0' : tolower( p ) - 'a' + 10; } +/** Decode a url-encoded string containing hexadecimal character sequences. +*/ +static char *url_decode( char *dest, char *src ) +{ + char *p = dest; + + while ( *src ) + { + if ( *src == '%' ) + { + *p ++ = ( tohex( *( src + 1 ) ) << 4 ) | tohex( *( src + 2 ) ); + src += 3; + } + else + { + *p ++ = *src ++; + } + } + + *p = *src; + return dest; +} + +/** Extract the filename from a URL attaching parameters to a properties list. +*/ +static void parse_url( mlt_properties properties, char *url ) +{ + int i; + int n = strlen( url ); + char *name = NULL; + char *value = NULL; + + for ( i = 0; i < n; i++ ) + { + switch ( url[ i ] ) + { + case '?': + url[ i++ ] = '\0'; + name = &url[ i ]; + break; + + case ':': + case '=': + url[ i++ ] = '\0'; + value = &url[ i ]; + break; + + case '&': + url[ i++ ] = '\0'; + if ( name != NULL && value != NULL ) + mlt_properties_set( properties, name, value ); + name = &url[ i ]; + value = NULL; + break; + } + } + if ( name != NULL && value != NULL ) + mlt_properties_set( properties, name, value ); +} + +mlt_producer producer_westley_init( char *url ) +{ + if ( url == NULL ) + return NULL; + 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; + char *filename = strdup( url ); + + context->producer_map = mlt_properties_new(); + context->destructors = mlt_properties_new(); + context->params = mlt_properties_new(); + + // Decode URL and parse parameters + parse_url( context->params, url_decode( filename, url ) ); + + // We need to track the number of registered filters + mlt_properties_set_int( context->destructors, "registered", 0 ); + + // We need the directory prefix which was used for the westley + mlt_properties_set( context->producer_map, "_root", "" ); + if ( strchr( filename, '/' ) ) + { + char *root = NULL; + mlt_properties_set( context->producer_map, "_root", filename ); + root = mlt_properties_get( context->producer_map, "_root" ); + *( strrchr( root, '/' ) + 1 ) = '\0'; + } + + // 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 && strcmp( type, "producer" ) != 0 ) ) + service = NULL; + } + +#ifdef DEBUG + xmlDocPtr doc = westley_make_doc( service ); + xmlDocFormatDump( stdout, doc, 1 ); + xmlFreeDoc( doc ); + service = NULL; +#endif + + 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 -- ) + { + 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", url ); + + // This tells consumer_westley not to deep copy + mlt_properties_set( properties, "westley", "was here" ); + } + else + { + // Return null if not well formed + service = NULL; + + // Clean up + mlt_properties_close( context->destructors ); + } + + // Clean up + mlt_properties_close( context->producer_map ); + if ( context->params != NULL ) + mlt_properties_close( context->params ); + free( context ); + free( filename ); + + return MLT_PRODUCER( service ); +}