// 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 <framework/mlt.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
+#include <ctype.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h> // for xmlCreateFileParserCtxt
#include <libxml/tree.h>
#define STACK_SIZE 1000
+#define BRANCH_SIG_LEN 4000
+
+#undef DEBUG
+#ifdef DEBUG
+extern xmlDocPtr westley_make_doc( mlt_service service );
+#endif
struct deserialise_context_s
{
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;
+ mlt_deque filter_queue;
+ int in_producer;
};
typedef struct deserialise_context_s *deserialise_context;
+/** Convert the numerical current branch address to a dot-delimited string.
+*/
+static char *serialise_branch( deserialise_context this, char *s )
+{
+ int i;
+
+ 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;
+}
/** Push a service.
*/
{
int ret = this->stack_service_size >= STACK_SIZE - 1;
if ( ret == 0 )
- this->stack_service[ this->stack_service_size ++ ] = that;
+ {
+ 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;
}
}
+// Prepend the property value with the document 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 );
{
mlt_properties properties = context->producer_properties = mlt_properties_new();
+ context->in_producer ++;
+
for ( ; atts != NULL && *atts != NULL; atts += 2 )
{
mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
{
- mlt_properties properties = context->producer_properties = mlt_properties_new();
+ mlt_properties properties = mlt_properties_new();
+
+ if ( context->in_producer != 0 )
+ mlt_deque_push_front( context->filter_queue, context->producer_properties );
+
+ context->producer_properties = properties;
// Set the properties
for ( ; atts != NULL && *atts != NULL; atts += 2 )
{
// 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 ) )
+ 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 )
{
- if ( strcmp( resource, "<playlist>" ) == 0 )
- {
- // Append this producer to the playlist
- mlt_playlist_append_io( MLT_PLAYLIST( producer ),
- MLT_PRODUCER( service ), in, out );
- }
- else
+ 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 ) )
{
- // Set this producer on the multitrack
- mlt_multitrack_connect( MLT_MULTITRACK( producer ),
- MLT_PRODUCER( service ),
- mlt_multitrack_count( MLT_MULTITRACK( producer ) ) );
+//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, "<playlist>" ) == 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;
}
- // Normally, the enclosing entry or track will pop this service off
- // In its absence we do not push it on.
- return 1;
}
}
return 0;
mlt_service producer = context_pop_service( context );
if ( producer == NULL )
return;
-
+
// Get the tractor from the stack
mlt_service service = context_pop_service( context );
resource = mlt_properties_get( mlt_service_properties( service ), "resource" );
if ( service == NULL || resource == NULL || strcmp( resource, "<tractor>" ) )
{
+//printf("creating a tractor\n");
+ char current_branch[ BRANCH_SIG_LEN ];
+
// Put the anonymous service back onto the stack!
- context_push_service( context, service );
+ 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 );
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_properties_set_data( mlt_service_properties( service ), "multitrack",
MLT_MULTITRACK( producer ), 0, NULL, NULL );
- // See if the producer should be added to a playlist or multitrack
+ // 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
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( mlt_service_properties( producer ), "resource" );
+ char *resource = mlt_properties_get( producer_props, "resource" );
if ( resource && strcmp( resource, "<tractor>" ) == 0 )
// If so chomp its producer
context_pop_service( context );
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 );
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( mlt_service_properties( track ), "in" ) != NULL ||
- mlt_properties_get( mlt_service_properties( track ), "out" ) != NULL )
+ 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( mlt_service_properties( track ), "in" ),
- mlt_properties_get_position( mlt_service_properties( track ), "out" ) );
+ 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
mlt_properties properties = context->producer_properties;
mlt_service service = NULL;
+ context->in_producer --;
+
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 )
{
- service = MLT_SERVICE( mlt_factory_producer( "fezzik", mlt_properties_get( properties, "mlt_service" ) ) );
+ 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 )
{
- 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 );
+ service = MLT_SERVICE( mlt_factory_producer( "fezzik", resource ) );
}
+
if ( service == NULL )
return;
track_service( context->destructors, service, (mlt_destructor) mlt_producer_close );
}
}
+ // Allow for embedded filters
+ while( mlt_deque_count( context->filter_queue ) )
+ {
+ mlt_properties filter_properties = mlt_deque_pop_front( context->filter_queue );
+ mlt_properties_debug( filter_properties, "Filter?", stderr );
+ mlt_filter filter = mlt_factory_filter( mlt_properties_get( filter_properties, "mlt_service" ), NULL );
+ if ( filter != NULL )
+ {
+ track_service( context->destructors, filter, (mlt_destructor) mlt_filter_close );
+ qualify_property( context, filter_properties, "resource" );
+ qualify_property( context, filter_properties, "luma" );
+ qualify_property( context, filter_properties, "luma.resource" );
+ qualify_property( context, filter_properties, "composite.luma" );
+ qualify_property( context, filter_properties, "producer.resource" );
+ mlt_properties_inherit( mlt_filter_properties( filter ), filter_properties );
+ mlt_properties_close( filter_properties );
+ mlt_producer_attach( MLT_PRODUCER( service ), filter );
+ }
+ }
+
// 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 ( context->in_producer )
+ {
+ mlt_deque_push_back( context->filter_queue, properties );
+ context->producer_properties = mlt_deque_pop_front( context->filter_queue );
+ return;
+ }
+
if ( properties == NULL )
return;
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;
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;
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 )
{
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_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 )
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 );
- else if ( context->property != NULL && context->producer_properties != NULL )
- mlt_properties_set( context->producer_properties, context->property, 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 ) );
+ }
+
+ // 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,
{
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 )
+ {
+ xmlCreateIntSubset( context->entity_doc, "westley", "", "" );
+ context->publicId = "";
+ context->systemId = "";
+ }
+
+ // 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;
+}
+
+/** 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 ++;
+ }
+ }
- return xmlGetDocEntity( context->entity_doc, name );
+ *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 *filename )
+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();
+ context->filter_queue = mlt_deque_init();
+
+ // 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 );
// 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 ) )
+ 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;
mlt_properties_set_data( properties, "__destructors__", context->destructors, 0, (mlt_destructor) mlt_properties_close, NULL );
// Now assign additional properties
- mlt_properties_set( properties, "resource", filename );
+ mlt_properties_set( properties, "resource", url );
// This tells consumer_westley not to deep copy
mlt_properties_set( properties, "westley", "was here" );
mlt_properties_close( context->destructors );
}
- free( context->stack_service );
+ // Clean up
mlt_properties_close( context->producer_map );
- //free( context );
+ if ( context->params != NULL )
+ mlt_properties_close( context->params );
+ mlt_deque_close( context->filter_queue );
+ free( context );
+ free( filename );
return MLT_PRODUCER( service );
}
projects / melted / blobdiff