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 );
35 static int consumer_is_stopped( mlt_consumer this );
37 /** This is what will be called by the factory - anything can be passed in
38 via the argument, but keep it simple.
41 mlt_consumer consumer_westley_init( char *arg )
43 // Create the consumer object
44 mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
46 // If no malloc'd and consumer init ok
47 if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
49 // We have stuff to clean up, so override the close method
50 //parent->close = consumer_close;
52 // Allow thread to be started/stopped
53 this->start = consumer_start;
54 this->is_stopped = consumer_is_stopped;
56 mlt_properties_set( mlt_consumer_properties( this ), "resource", arg );
58 // Return the consumer produced
62 // malloc or consumer init failed
70 // This maintains counters for adding ids to elements
71 struct serialise_context_s
80 mlt_properties producer_map;
82 typedef struct serialise_context_s* serialise_context;
85 static inline void serialise_properties( mlt_properties properties, xmlNode *node )
90 // Enumerate the properties
91 for ( i = 0; i < mlt_properties_count( properties ); i++ )
93 char *name = mlt_properties_get_name( properties, i );
96 mlt_properties_get_value( properties, i ) != NULL &&
97 strcmp( name, "westley" ) != 0 )
100 p = xmlNewChild( node, NULL, "prop", NULL );
104 xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
109 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
112 xmlNode *child = node;
113 char id[ ID_SIZE + 1 ];
115 id[ ID_SIZE ] = '\0';
118 // Iterate over consumer/producer connections
119 while ( service != NULL )
121 mlt_properties properties = mlt_service_properties( service );
122 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
124 // Tell about the producer
125 if ( strcmp( mlt_type, "producer" ) == 0 )
127 if ( context->pass == 0 )
129 child = xmlNewChild( node, NULL, "producer", NULL );
132 if ( mlt_properties_get( properties, "id" ) == NULL )
134 snprintf( id, ID_SIZE, "producer%d", context->producer_count++ );
135 xmlNewProp( child, "id", id );
138 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
139 serialise_properties( properties, child );
141 // Add producer to the map
142 snprintf( key, 10, "%p", service );
143 mlt_properties_set( context->producer_map, key, id );
147 snprintf( key, 10, "%p", service );
148 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
150 if ( mlt_properties_get( properties, "westley" ) != NULL )
154 // Tell about the framework container producers
155 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
157 // Recurse on multitrack's tracks
158 if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
160 if ( context->pass == 0 )
162 // Iterate over the tracks
163 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
165 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
170 // Iterate over the tracks to collect the producers
171 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
173 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
176 child = xmlNewChild( node, NULL, "multitrack", NULL );
179 if ( mlt_properties_get( properties, "id" ) == NULL )
181 snprintf( id, ID_SIZE, "multitrack%d", context->multitrack_count++ );
182 xmlNewProp( child, "id", id );
185 // Iterate over the tracks
186 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
188 xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
189 snprintf( key, 10, "%p", MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ) );
190 xmlNewProp( track, "producer", mlt_properties_get( context->producer_map, key ) );
196 // Recurse on playlist's clips
197 else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
199 mlt_playlist_clip_info info;
201 if ( context->pass == 0 )
203 // Iterate over the playlist entries to collect the producers
204 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
206 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
208 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) != 0 )
210 serialise_service( context, MLT_SERVICE( info.producer ), node );
215 child = xmlNewChild( node, NULL, "playlist", NULL );
218 if ( mlt_properties_get( properties, "id" ) == NULL )
220 snprintf( id, ID_SIZE, "playlist%d", context->playlist_count++ );
221 xmlNewProp( child, "id", id );
224 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
226 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
227 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
229 // Add producer to the map
230 snprintf( key, 10, "%p", service );
231 mlt_properties_set( context->producer_map, key, id );
233 // Iterate over the playlist entries
234 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
236 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
238 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
242 xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
243 snprintf( length, 19, "%lld", info.frame_count );
244 xmlNewProp( entry, "length", length );
248 xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
249 snprintf( key, 10, "%p", MLT_SERVICE( info.producer ) );
250 xmlNewProp( entry, "producer", mlt_properties_get( context->producer_map, key ) );
255 else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
257 snprintf( key, 10, "%p", service );
258 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
262 // Recurse on tractor's producer
263 else if ( strcmp( mlt_properties_get( properties, "resource" ), "<tractor>" ) == 0 )
265 if ( context->pass == 0 )
267 // Recurse on connected producer
268 serialise_service( context, mlt_service_get_producer( service ), node );
272 child = xmlNewChild( node, NULL, "tractor", NULL );
275 if ( mlt_properties_get( properties, "id" ) == NULL )
277 snprintf( id, ID_SIZE, "tractor%d", context->tractor_count++ );
278 xmlNewProp( child, "id", id );
281 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
282 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
284 // Recurse on connected producer
285 serialise_service( context, mlt_service_get_producer( service ), child );
291 // Tell about a filter
292 else if ( strcmp( mlt_type, "filter" ) == 0 )
294 // Recurse on connected producer
295 serialise_service( context, MLT_SERVICE( MLT_FILTER( service )->producer ), node );
297 if ( context->pass == 1 )
299 child = xmlNewChild( node, NULL, "filter", NULL );
302 if ( mlt_properties_get( properties, "id" ) == NULL )
304 snprintf( id, ID_SIZE, "filter%d", context->filter_count++ );
305 xmlNewProp( child, "id", id );
308 serialise_properties( properties, child );
313 // Tell about a transition
314 else if ( strcmp( mlt_type, "transition" ) == 0 )
316 // Recurse on connected producer
317 serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
319 if ( context->pass == 1 )
321 child = xmlNewChild( node, NULL, "transition", NULL );
324 if ( mlt_properties_get( properties, "id" ) == NULL )
326 snprintf( id, ID_SIZE, "transition%d", context->transition_count++ );
327 xmlNewProp( child, "id", id );
330 serialise_properties( properties, child );
335 // Get the next connected service
336 service = mlt_service_get_producer( service );
340 static int consumer_start( mlt_consumer this )
342 mlt_service inigo = NULL;
343 xmlDoc *doc = xmlNewDoc( "1.0" );
344 xmlNode *root = xmlNewNode( NULL, "westley" );
345 xmlDocSetRootElement( doc, root );
347 // Get the producer service
348 mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
349 if ( service != NULL )
351 struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
352 context->producer_map = mlt_properties_new();
355 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
356 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
359 // Ensure producer is a framework producer
360 mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
362 // In pass one, we serialise the end producers and playlists,
363 // adding them to a map keyed by address.
364 serialise_service( context, service, root );
366 // In pass two, we serialise the tractor and reference the
367 // producers and playlists
369 serialise_service( context, service, root );
371 mlt_properties_close( context->producer_map );
374 if ( mlt_properties_get( mlt_consumer_properties( this ), "resource" ) == NULL )
375 xmlDocFormatDump( stdout, doc, 1 );
377 xmlSaveFormatFile( mlt_properties_get( mlt_consumer_properties( this ), "resource" ), doc, 1 );
381 mlt_consumer_stop( this );
386 static int consumer_is_stopped( mlt_consumer this )