// TODO: destroy unreferenced producers (they are currently destroyed
// when the returned producer is closed).
-// TODO: try using XmlReader interface to avoid global context issues in sax.
-
+// TODO: determine why deserialise_context can not be released.
+
#include "producer_westley.h"
#include <framework/mlt.h>
#include <stdlib.h>
#include <stdio.h>
#include <libxml/parser.h>
+#include <libxml/parserInternals.h> // for xmlCreateFileParserCtxt
+#include <libxml/tree.h>
#define STACK_SIZE 1000
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;
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;
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 )
{
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() );
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 );
}
// 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 )
{
static void on_start_entry_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
{
- // Use a dummy service to hold properties to allow arbitratry nesting
+ // 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 );
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, "<playlist>" ) == 0 ||
+ strcmp( resource, "<multitrack>" ) == 0 ) )
+ {
+ if ( strcmp( resource, "<playlist>" ) == 0 )
+ {
+ // Append this producer to the playlist
+ mlt_playlist_append_io( MLT_PLAYLIST( producer ),
+ MLT_PRODUCER( service ), in, out );
+ }
+ else
+ {
+ // Set this producer on the multitrack
+ mlt_multitrack_connect( MLT_MULTITRACK( producer ),
+ MLT_PRODUCER( service ),
+ mlt_multitrack_count( MLT_MULTITRACK( producer ) ) );
+ }
+ // 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, "<tractor>" ) )
+ {
+ // 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 );
+ mlt_properties properties = mlt_service_properties( producer );
mlt_position in = mlt_properties_get_position( properties, "in" );
mlt_position out;
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;
+
+ // See if the producer is a tractor
+ char *resource = mlt_properties_get( mlt_service_properties( producer ), "resource" );
+ if ( resource && strcmp( resource, "<tractor>" ) == 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 )
+ {
+ context_push_service( context, producer );
+ return;
+ }
// 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 ),
{
// 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, "<tractor>" ) == 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 )
+ {
+ 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 ||
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;
if ( properties == NULL )
return;
+ 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" );
+
// Instantiate the producer
if ( mlt_properties_get( properties, "mlt_service" ) != NULL )
{
service = MLT_SERVICE( mlt_factory_producer( "fezzik", mlt_properties_get( properties, "mlt_service" ) ) );
}
- if ( service == NULL && mlt_properties_get( properties, "resource" ) != NULL )
+ if ( service == NULL && resource != NULL )
{
char *root = mlt_properties_get( context->producer_map, "_root" );
- char *resource = mlt_properties_get( properties, "resource" );
char *full_resource = malloc( strlen( root ) + strlen( resource ) + 1 );
if ( resource[ 0 ] != '/' )
{
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, "<entry_track>" ) == 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 )
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, "<tractor>" ) == 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
context->producer_properties = NULL;
properties = mlt_service_properties( service );
- // Set in and out
-//fprintf( stderr, "setting filter in %d out %d\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" ), "<tractor>" ) == 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 %d out %d\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 )
// 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, "<tractor>" ) == 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
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 );
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 );
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 );
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 )
{
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();
*( 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;
-
- // I REALLY DON'T GET THIS - HOW THE HELL CAN YOU REFERENCE A WESTLEY IN A WESTLEY???
- xmlInitParser();
-
- xmlSAXUserParseFile( sax, context, filename );
-
- // Need the complete producer list for various reasons
- properties = context->destructors;
+ 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 -- )
{
}
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 );
}
projects / mlt / commitdiff
