2 * consumer_westley.c -- a libxml2 serialiser of mlt service networks
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include "consumer_westley.h"
22 #include <framework/mlt.h>
27 #include <libxml/tree.h>
31 /** Forward references to static functions.
34 static int consumer_start( mlt_consumer parent );
36 /** This is what will be called by the factory - anything can be passed in
37 via the argument, but keep it simple.
40 mlt_consumer consumer_westley_init( char *arg )
42 // Create the consumer object
43 mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
45 // If no malloc'd and consumer init ok
46 if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
48 // We have stuff to clean up, so override the close method
49 //parent->close = consumer_close;
51 // Allow thread to be started/stopped
52 this->start = consumer_start;
54 mlt_properties_set( mlt_consumer_properties( this ), "resource", arg );
56 // Return the consumer produced
60 // malloc or consumer init failed
68 // This maintains counters for adding ids to elements
69 struct serialise_context_s
78 mlt_properties producer_map;
80 typedef struct serialise_context_s* serialise_context;
83 static inline void serialise_properties( mlt_properties properties, xmlNode *node )
88 // Enumerate the properties
89 for ( i = 0; i < mlt_properties_count( properties ); i++ )
91 char *name = mlt_properties_get_name( properties, i );
94 mlt_properties_get_value( properties, i ) != NULL &&
95 strcmp( name, "westley" ) != 0 )
98 p = xmlNewChild( node, NULL, "prop", NULL );
102 xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
107 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
110 xmlNode *child = node;
111 char id[ ID_SIZE + 1 ];
113 id[ ID_SIZE ] = '\0';
116 // Iterate over consumer/producer connections
117 while ( service != NULL )
119 mlt_properties properties = mlt_service_properties( service );
120 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
122 // Tell about the producer
123 if ( strcmp( mlt_type, "producer" ) == 0 )
125 if ( context->pass == 0 )
127 child = xmlNewChild( node, NULL, "producer", NULL );
130 if ( mlt_properties_get( properties, "id" ) == NULL )
132 snprintf( id, ID_SIZE, "producer%d", context->producer_count++ );
133 xmlNewProp( child, "id", id );
136 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
137 serialise_properties( properties, child );
139 // Add producer to the map
140 snprintf( key, 10, "%p", service );
141 mlt_properties_set( context->producer_map, key, id );
145 snprintf( key, 10, "%p", service );
146 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
148 if ( mlt_properties_get( properties, "westley" ) != NULL )
152 // Tell about the framework container producers
153 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
155 // Recurse on multitrack's tracks
156 if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
158 if ( context->pass == 0 )
160 // Iterate over the tracks
161 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
163 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
168 // Iterate over the tracks to collect the producers
169 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
171 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
174 child = xmlNewChild( node, NULL, "multitrack", NULL );
177 if ( mlt_properties_get( properties, "id" ) == NULL )
179 snprintf( id, ID_SIZE, "multitrack%d", context->multitrack_count++ );
180 xmlNewProp( child, "id", id );
183 // Iterate over the tracks
184 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
186 xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
187 snprintf( key, 10, "%p", MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ) );
188 xmlNewProp( track, "producer", mlt_properties_get( context->producer_map, key ) );
194 // Recurse on playlist's clips
195 else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
197 mlt_playlist_clip_info info;
199 if ( context->pass == 0 )
201 // Iterate over the playlist entries to collect the producers
202 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
204 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
206 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) != 0 )
208 serialise_service( context, MLT_SERVICE( info.producer ), node );
213 child = xmlNewChild( node, NULL, "playlist", NULL );
216 if ( mlt_properties_get( properties, "id" ) == NULL )
218 snprintf( id, ID_SIZE, "playlist%d", context->playlist_count++ );
219 xmlNewProp( child, "id", id );
222 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
224 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
225 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
227 // Add producer to the map
228 snprintf( key, 10, "%p", service );
229 mlt_properties_set( context->producer_map, key, id );
231 // Iterate over the playlist entries
232 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
234 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
236 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
240 xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
241 snprintf( length, 19, "%lld", info.frame_count );
242 xmlNewProp( entry, "length", length );
246 xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
247 snprintf( key, 10, "%p", MLT_SERVICE( info.producer ) );
248 xmlNewProp( entry, "producer", mlt_properties_get( context->producer_map, key ) );
253 else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
255 snprintf( key, 10, "%p", service );
256 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
260 // Recurse on tractor's producer
261 else if ( strcmp( mlt_properties_get( properties, "resource" ), "<tractor>" ) == 0 )
263 if ( context->pass == 0 )
265 // Recurse on connected producer
266 serialise_service( context, mlt_service_get_producer( service ), node );
270 child = xmlNewChild( node, NULL, "tractor", NULL );
273 if ( mlt_properties_get( properties, "id" ) == NULL )
275 snprintf( id, ID_SIZE, "tractor%d", context->tractor_count++ );
276 xmlNewProp( child, "id", id );
279 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
280 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
282 // Recurse on connected producer
283 serialise_service( context, mlt_service_get_producer( service ), child );
289 // Tell about a filter
290 else if ( strcmp( mlt_type, "filter" ) == 0 )
292 // Recurse on connected producer
293 serialise_service( context, MLT_SERVICE( MLT_FILTER( service )->producer ), node );
295 if ( context->pass == 1 )
297 child = xmlNewChild( node, NULL, "filter", NULL );
300 if ( mlt_properties_get( properties, "id" ) == NULL )
302 snprintf( id, ID_SIZE, "filter%d", context->filter_count++ );
303 xmlNewProp( child, "id", id );
306 serialise_properties( properties, child );
311 // Tell about a transition
312 else if ( strcmp( mlt_type, "transition" ) == 0 )
314 // Recurse on connected producer
315 serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
317 if ( context->pass == 1 )
319 child = xmlNewChild( node, NULL, "transition", NULL );
322 if ( mlt_properties_get( properties, "id" ) == NULL )
324 snprintf( id, ID_SIZE, "transition%d", context->transition_count++ );
325 xmlNewProp( child, "id", id );
328 serialise_properties( properties, child );
333 // Get the next connected service
334 service = mlt_service_get_producer( service );
338 static int consumer_start( mlt_consumer this )
340 mlt_service inigo = NULL;
341 xmlDoc *doc = xmlNewDoc( "1.0" );
342 xmlNode *root = xmlNewNode( NULL, "westley" );
343 xmlDocSetRootElement( doc, root );
345 // Get the producer service
346 mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
347 if ( service != NULL )
349 struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
350 context->producer_map = mlt_properties_new();
353 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
354 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
357 // Ensure producer is a framework producer
358 mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
360 // In pass one, we serialise the end producers and playlists,
361 // adding them to a map keyed by address.
362 serialise_service( context, service, root );
364 // In pass two, we serialise the tractor and reference the
365 // producers and playlists
367 serialise_service( context, service, root );
369 mlt_properties_close( context->producer_map );
372 if ( mlt_properties_get( mlt_consumer_properties( this ), "resource" ) == NULL )
373 xmlDocFormatDump( stdout, doc, 1 );
375 xmlSaveFormatFile( mlt_properties_get( mlt_consumer_properties( this ), "resource" ), doc, 1 );
379 mlt_consumer_stop( this );
381 // Tell inigo, enough already!
383 mlt_properties_set_int( mlt_service_properties( inigo ), "done", 1 );