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mlt/src/modules/westley/consumer_westley.c

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/*
* consumer_westley.c -- a libxml2 serialiser of mlt service networks
* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
* Author: Dan Dennedy <dan@dennedy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "consumer_westley.h"
#include <framework/mlt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <libxml/tree.h>
#define ID_SIZE 128
#define _x (xmlChar*)
#define _s (char*)
// This maintains counters for adding ids to elements
struct serialise_context_s
{
mlt_properties id_map;
int producer_count;
int multitrack_count;
int playlist_count;
int tractor_count;
int filter_count;
int transition_count;
int pass;
mlt_properties hide_map;
char *root;
char *store;
};
typedef struct serialise_context_s* serialise_context;
/** Forward references to static functions.
*/
static int consumer_start( mlt_consumer parent );
static int consumer_is_stopped( mlt_consumer this );
static void serialise_service( serialise_context context, mlt_service service, xmlNode *node );
typedef enum
{
westley_existing,
westley_producer,
westley_multitrack,
westley_playlist,
westley_tractor,
westley_filter,
westley_transition
}
westley_type;
/** Create or retrieve an id associated to this service.
*/
static char *westley_get_id( serialise_context context, mlt_service service, westley_type type )
{
char *id = NULL;
int i = 0;
mlt_properties map = context->id_map;
// Search the map for the service
for ( i = 0; i < mlt_properties_count( map ); i ++ )
if ( mlt_properties_get_data_at( map, i, NULL ) == service )
break;
// If the service is not in the map, and the type indicates a new id is needed...
if ( i >= mlt_properties_count( map ) && type != westley_existing )
{
// Attempt to reuse existing id
id = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "id" );
// If no id, or the id is used in the map (for another service), then
// create a new one.
if ( id == NULL || mlt_properties_get_data( map, id, NULL ) != NULL )
{
char temp[ ID_SIZE ];
do
{
switch( type )
{
case westley_producer:
sprintf( temp, "producer%d", context->producer_count ++ );
break;
case westley_multitrack:
sprintf( temp, "multitrack%d", context->multitrack_count ++ );
break;
case westley_playlist:
sprintf( temp, "playlist%d", context->playlist_count ++ );
break;
case westley_tractor:
sprintf( temp, "tractor%d", context->tractor_count ++ );
break;
case westley_filter:
sprintf( temp, "filter%d", context->filter_count ++ );
break;
case westley_transition:
sprintf( temp, "transition%d", context->transition_count ++ );
break;
case westley_existing:
// Never gets here
break;
}
}
while( mlt_properties_get_data( map, temp, NULL ) != NULL );
// Set the data at the generated name
mlt_properties_set_data( map, temp, service, 0, NULL, NULL );
// Get the pointer to the name (i is the end of the list)
id = mlt_properties_get_name( map, i );
}
else
{
// Store the existing id in the map
mlt_properties_set_data( map, id, service, 0, NULL, NULL );
}
}
else if ( type == westley_existing )
{
id = mlt_properties_get_name( map, i );
}
return id;
}
/** This is what will be called by the factory - anything can be passed in
via the argument, but keep it simple.
*/
mlt_consumer consumer_westley_init( char *arg )
{
// Create the consumer object
mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
// If no malloc'd and consumer init ok
if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
{
// Allow thread to be started/stopped
this->start = consumer_start;
this->is_stopped = consumer_is_stopped;
mlt_properties_set( MLT_CONSUMER_PROPERTIES( this ), "resource", arg );
// Return the consumer produced
return this;
}
// malloc or consumer init failed
free( this );
// Indicate failure
return NULL;
}
static void serialise_properties( serialise_context context, mlt_properties properties, xmlNode *node )
{
int i;
xmlNode *p;
// Enumerate the properties
for ( i = 0; i < mlt_properties_count( properties ); i++ )
{
char *name = mlt_properties_get_name( properties, i );
if ( name != NULL &&
name[ 0 ] != '_' &&
mlt_properties_get_value( properties, i ) != NULL &&
strcmp( name, "westley" ) != 0 &&
strcmp( name, "in" ) != 0 &&
strcmp( name, "out" ) != 0 &&
strcmp( name, "id" ) != 0 &&
strcmp( name, "title" ) != 0 &&
strcmp( name, "root" ) != 0 &&
strcmp( name, "width" ) != 0 &&
strcmp( name, "height" ) != 0 )
{
char *value = mlt_properties_get_value( properties, i );
if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
value += strlen( context->root ) + 1;
p = xmlNewTextChild( node, NULL, _x("property"), _x(value) );
xmlNewProp( p, _x("name"), _x(name) );
}
}
}
static void serialise_store_properties( serialise_context context, mlt_properties properties, xmlNode *node, char *store )
{
int i;
xmlNode *p;
// Enumerate the properties
for ( i = 0; store != NULL && i < mlt_properties_count( properties ); i++ )
{
char *name = mlt_properties_get_name( properties, i );
if ( !strncmp( name, store, strlen( store ) ) )
{
char *value = mlt_properties_get_value( properties, i );
if ( value != NULL )
{
if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
value += strlen( context->root ) + 1;
p = xmlNewTextChild( node, NULL, _x("property"), _x(value) );
xmlNewProp( p, _x("name"), _x(name) );
}
}
}
}
static inline void serialise_service_filters( serialise_context context, mlt_service service, xmlNode *node )
{
int i;
xmlNode *p;
mlt_filter filter = NULL;
// Enumerate the filters
for ( i = 0; ( filter = mlt_producer_filter( MLT_PRODUCER( service ), i ) ) != NULL; i ++ )
{
mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
if ( mlt_properties_get_int( properties, "_fezzik" ) == 0 )
{
// Get a new id - if already allocated, do nothing
char *id = westley_get_id( context, MLT_FILTER_SERVICE( filter ), westley_filter );
if ( id != NULL )
{
int in = mlt_properties_get_position( properties, "in" );
int out = mlt_properties_get_position( properties, "out" );
p = xmlNewChild( node, NULL, _x("filter"), NULL );
xmlNewProp( p, _x("id"), _x(id) );
if ( mlt_properties_get( properties, "title" ) )
xmlNewProp( p, _x("title"), _x(mlt_properties_get( properties, "title" )) );
if ( in != 0 || out != 0 )
{
char temp[ 20 ];
sprintf( temp, "%d", in );
xmlNewProp( p, _x("in"), _x(temp) );
sprintf( temp, "%d", out );
xmlNewProp( p, _x("out"), _x(temp) );
}
serialise_properties( context, properties, p );
serialise_service_filters( context, MLT_FILTER_SERVICE( filter ), p );
}
}
}
}
static void serialise_producer( serialise_context context, mlt_service service, xmlNode *node )
{
xmlNode *child = node;
mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( MLT_PRODUCER( service ) ) );
if ( context->pass == 0 )
{
mlt_properties properties = MLT_SERVICE_PROPERTIES( parent );
// Get a new id - if already allocated, do nothing
char *id = westley_get_id( context, parent, westley_producer );
if ( id == NULL )
return;
child = xmlNewChild( node, NULL, _x("producer"), NULL );
// Set the id
xmlNewProp( child, _x("id"), _x(id) );
if ( mlt_properties_get( properties, "title" ) )
xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
serialise_properties( context, properties, child );
serialise_service_filters( context, service, child );
// Add producer to the map
mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
}
else
{
char *id = westley_get_id( context, parent, westley_existing );
mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
xmlNewProp( node, _x("parent"), _x(id) );
xmlNewProp( node, _x("in"), _x(mlt_properties_get( properties, "in" )) );
xmlNewProp( node, _x("out"), _x(mlt_properties_get( properties, "out" )) );
}
}
static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node );
static void serialise_multitrack( serialise_context context, mlt_service service, xmlNode *node )
{
int i;
if ( context->pass == 0 )
{
// Iterate over the tracks to collect the producers
for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
{
mlt_producer producer = mlt_producer_cut_parent( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) );
serialise_service( context, MLT_SERVICE( producer ), node );
}
}
else
{
// Get a new id - if already allocated, do nothing
char *id = westley_get_id( context, service, westley_multitrack );
if ( id == NULL )
return;
// Serialise the tracks
for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
{
xmlNode *track = xmlNewChild( node, NULL, _x("track"), NULL );
int hide = 0;
mlt_producer producer = mlt_multitrack_track( MLT_MULTITRACK( service ), i );
mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( producer ) );
char *id = westley_get_id( context, MLT_SERVICE( parent ), westley_existing );
xmlNewProp( track, _x("producer"), _x(id) );
if ( mlt_producer_is_cut( producer ) )
{
xmlNewProp( track, _x("in"), _x(mlt_properties_get( properties, "in" )) );
xmlNewProp( track, _x("out"), _x(mlt_properties_get( properties, "out" )) );
serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, context->store );
serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, "meta." );
serialise_service_filters( context, MLT_PRODUCER_SERVICE( producer ), track );
}
hide = mlt_properties_get_int( context->hide_map, id );
if ( hide )
xmlNewProp( track, _x("hide"), _x( hide == 1 ? "video" : ( hide == 2 ? "audio" : "both" ) ) );
}
serialise_service_filters( context, service, node );
}
}
static void serialise_playlist( serialise_context context, mlt_service service, xmlNode *node )
{
int i;
xmlNode *child = node;
mlt_playlist_clip_info info;
mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
if ( context->pass == 0 )
{
// Get a new id - if already allocated, do nothing
char *id = westley_get_id( context, service, westley_playlist );
if ( id == NULL )
return;
// Iterate over the playlist entries to collect the producers
for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
{
if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
{
if ( info.producer != NULL )
{
mlt_producer producer = mlt_producer_cut_parent( info.producer );
char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
char *resource_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "resource" );
if ( resource_s != NULL && !strcmp( resource_s, "<playlist>" ) )
serialise_playlist( context, MLT_SERVICE( producer ), node );
else if ( service_s != NULL && strcmp( service_s, "blank" ) != 0 )
serialise_service( context, MLT_SERVICE( producer ), node );
}
}
}
child = xmlNewChild( node, NULL, _x("playlist"), NULL );
// Set the id
xmlNewProp( child, _x("id"), _x(id) );
if ( mlt_properties_get( properties, "title" ) )
xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
// Store application specific properties
serialise_store_properties( context, properties, child, context->store );
serialise_store_properties( context, properties, child, "meta." );
// Add producer to the map
mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
// Iterate over the playlist entries
for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
{
if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
{
mlt_producer producer = mlt_producer_cut_parent( info.producer );
char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
if ( service_s != NULL && strcmp( service_s, "blank" ) == 0 )
{
char length[ 20 ];
length[ 19 ] = '\0';
xmlNode *entry = xmlNewChild( child, NULL, _x("blank"), NULL );
snprintf( length, 19, "%d", (int)info.frame_count );
xmlNewProp( entry, _x("length"), _x(length) );
}
else
{
char temp[ 20 ];
xmlNode *entry = xmlNewChild( child, NULL, _x("entry"), NULL );
id = westley_get_id( context, MLT_SERVICE( producer ), westley_existing );
xmlNewProp( entry, _x("producer"), _x(id) );
sprintf( temp, "%d", (int)info.frame_in );
xmlNewProp( entry, _x("in"), _x(temp) );
sprintf( temp, "%d", (int)info.frame_out );
xmlNewProp( entry, _x("out"), _x(temp) );
if ( info.repeat > 1 )
{
sprintf( temp, "%d", info.repeat );
xmlNewProp( entry, _x("repeat"), _x(temp) );
}
if ( mlt_producer_is_cut( info.cut ) )
{
serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, context->store );
serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, "meta." );
serialise_service_filters( context, MLT_PRODUCER_SERVICE( info.cut ), entry );
}
}
}
}
serialise_service_filters( context, service, child );
}
else if ( xmlStrcmp( node->name, _x("tractor") ) != 0 )
{
char *id = westley_get_id( context, service, westley_existing );
xmlNewProp( node, _x("producer"), _x(id) );
}
}
static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node )
{
xmlNode *child = node;
mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
if ( context->pass == 0 )
{
// Recurse on connected producer
serialise_service( context, mlt_service_producer( service ), node );
}
else
{
// Get a new id - if already allocated, do nothing
char *id = westley_get_id( context, service, westley_tractor );
if ( id == NULL )
return;
child = xmlNewChild( node, NULL, _x("tractor"), NULL );
// Set the id
xmlNewProp( child, _x("id"), _x(id) );
if ( mlt_properties_get( properties, "title" ) )
xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
if ( mlt_properties_get( properties, "global_feed" ) )
xmlNewProp( child, _x("global_feed"), _x(mlt_properties_get( properties, "global_feed" )) );
xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
// Store application specific properties
serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, context->store );
serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, "meta." );
// Recurse on connected producer
serialise_service( context, mlt_service_producer( service ), child );
serialise_service_filters( context, service, child );
}
}
static void serialise_filter( serialise_context context, mlt_service service, xmlNode *node )
{
xmlNode *child = node;
mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
// Recurse on connected producer
serialise_service( context, mlt_service_producer( service ), node );
if ( context->pass == 1 )
{
// Get a new id - if already allocated, do nothing
char *id = westley_get_id( context, service, westley_filter );
if ( id == NULL )
return;
child = xmlNewChild( node, NULL, _x("filter"), NULL );
// Set the id
xmlNewProp( child, _x("id"), _x(id) );
if ( mlt_properties_get( properties, "title" ) )
xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
serialise_properties( context, properties, child );
serialise_service_filters( context, service, child );
}
}
static void serialise_transition( serialise_context context, mlt_service service, xmlNode *node )
{
xmlNode *child = node;
mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
// Recurse on connected producer
serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
if ( context->pass == 1 )
{
// Get a new id - if already allocated, do nothing
char *id = westley_get_id( context, service, westley_transition );
if ( id == NULL )
return;
child = xmlNewChild( node, NULL, _x("transition"), NULL );
// Set the id
xmlNewProp( child, _x("id"), _x(id) );
if ( mlt_properties_get( properties, "title" ) )
xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
serialise_properties( context, properties, child );
serialise_service_filters( context, service, child );
}
}
static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
{
// Iterate over consumer/producer connections
while ( service != NULL )
{
mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
char *mlt_type = mlt_properties_get( properties, "mlt_type" );
// Tell about the producer
if ( strcmp( mlt_type, "producer" ) == 0 )
{
char *mlt_service = mlt_properties_get( properties, "mlt_service" );
if ( mlt_properties_get( properties, "westley" ) == NULL && ( mlt_service != NULL && !strcmp( mlt_service, "tractor" ) ) )
{
context->pass = 0;
serialise_tractor( context, service, node );
context->pass = 1;
serialise_tractor( context, service, node );
context->pass = 0;
break;
}
else
{
serialise_producer( context, service, node );
}
if ( mlt_properties_get( properties, "westley" ) != NULL )
break;
}
// Tell about the framework container producers
else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
{
char *resource = mlt_properties_get( properties, "resource" );
// Recurse on multitrack's tracks
if ( strcmp( resource, "<multitrack>" ) == 0 )
{
serialise_multitrack( context, service, node );
break;
}
// Recurse on playlist's clips
else if ( strcmp( resource, "<playlist>" ) == 0 )
{
serialise_playlist( context, service, node );
}
// Recurse on tractor's producer
else if ( strcmp( resource, "<tractor>" ) == 0 )
{
context->pass = 0;
serialise_tractor( context, service, node );
context->pass = 1;
serialise_tractor( context, service, node );
context->pass = 0;
break;
}
// Treat it as a normal producer
else
{
serialise_producer( context, service, node );
}
}
// Tell about a filter
else if ( strcmp( mlt_type, "filter" ) == 0 )
{
serialise_filter( context, service, node );
break;
}
// Tell about a transition
else if ( strcmp( mlt_type, "transition" ) == 0 )
{
serialise_transition( context, service, node );
break;
}
// Get the next connected service
service = mlt_service_producer( service );
}
}
xmlDocPtr westley_make_doc( mlt_consumer consumer, mlt_service service )
{
mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
xmlDocPtr doc = xmlNewDoc( _x("1.0") );
xmlNodePtr root = xmlNewNode( NULL, _x("westley") );
struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
xmlDocSetRootElement( doc, root );
// If we have root, then deal with it now
if ( mlt_properties_get( properties, "root" ) != NULL )
{
xmlNewProp( root, _x("root"), _x(mlt_properties_get( properties, "root" )) );
context->root = strdup( mlt_properties_get( properties, "root" ) );
}
else
{
context->root = strdup( "" );
}
// Assign the additional 'storage' pattern for properties
context->store = mlt_properties_get( MLT_CONSUMER_PROPERTIES( consumer ), "store" );
// Assign a title property
if ( mlt_properties_get( properties, "title" ) != NULL )
xmlNewProp( root, _x("title"), _x(mlt_properties_get( properties, "title" )) );
mlt_properties_set_int( properties, "global_feed", 1 );
// Construct the context maps
context->id_map = mlt_properties_new();
context->hide_map = mlt_properties_new();
// Ensure producer is a framework producer
mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "mlt_type", "mlt_producer" );
// In pass one, we serialise the end producers and playlists,
// adding them to a map keyed by address.
serialise_service( context, service, root );
// In pass two, we serialise the tractor and reference the
// producers and playlists
context->pass++;
serialise_service( context, service, root );
// Cleanup resource
mlt_properties_close( context->id_map );
mlt_properties_close( context->hide_map );
free( context->root );
free( context );
return doc;
}
static int consumer_start( mlt_consumer this )
{
xmlDocPtr doc = NULL;
// Get the producer service
mlt_service service = mlt_service_producer( MLT_CONSUMER_SERVICE( this ) );
if ( service != NULL )
{
mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
char *resource = mlt_properties_get( properties, "resource" );
// Set the title if provided
if ( mlt_properties_get( properties, "title" ) )
mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", mlt_properties_get( properties, "title" ) );
else if ( mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "title" ) == NULL )
mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", "Anonymous Submission" );
// Check for a root on the consumer properties and pass to service
if ( mlt_properties_get( properties, "root" ) )
mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", mlt_properties_get( properties, "root" ) );
// Specify roots in other cases...
if ( resource != NULL && mlt_properties_get( properties, "root" ) == NULL )
{
// Get the current working directory
char *cwd = getcwd( NULL, 0 );
mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", cwd );
free( cwd );
}
// Make the document
doc = westley_make_doc( this, service );
// Handle the output
if ( resource == NULL || !strcmp( resource, "" ) )
{
xmlDocFormatDump( stdout, doc, 1 );
}
else if ( strchr( resource, '.' ) == NULL )
{
xmlChar *buffer = NULL;
int length = 0;
xmlDocDumpMemoryEnc( doc, &buffer, &length, "utf-8" );
mlt_properties_set( properties, resource, _s(buffer) );
xmlFree( buffer );
}
else
{
xmlSaveFormatFileEnc( resource, doc, "utf-8", 1 );
}
// Close the document
xmlFreeDoc( doc );
}
mlt_consumer_stop( this );
mlt_consumer_stopped( this );
return 0;
}
static int consumer_is_stopped( mlt_consumer this )
{
return 1;
}
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