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[melted] / src / modules / westley / consumer_westley.c
1 /*
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>
5 *
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.
10 *
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.
15 *
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.
19 */
20
21 #include "consumer_westley.h"
22 #include <framework/mlt.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <pthread.h>
27 #include <libxml/tree.h>
28
29 #define ID_SIZE 128
30
31 /** Forward references to static functions.
32 */
33
34 static int consumer_start( mlt_consumer parent );
35 static int consumer_is_stopped( mlt_consumer this );
36
37 /** This is what will be called by the factory - anything can be passed in
38 via the argument, but keep it simple.
39 */
40
41 mlt_consumer consumer_westley_init( char *arg )
42 {
43 // Create the consumer object
44 mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
45
46 // If no malloc'd and consumer init ok
47 if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
48 {
49 // We have stuff to clean up, so override the close method
50 //parent->close = consumer_close;
51
52 // Allow thread to be started/stopped
53 this->start = consumer_start;
54 this->is_stopped = consumer_is_stopped;
55
56 mlt_properties_set( mlt_consumer_properties( this ), "resource", arg );
57
58 // Return the consumer produced
59 return this;
60 }
61
62 // malloc or consumer init failed
63 free( this );
64
65 // Indicate failure
66 return NULL;
67 }
68
69
70 // This maintains counters for adding ids to elements
71 struct serialise_context_s
72 {
73 int producer_count;
74 int multitrack_count;
75 int playlist_count;
76 int tractor_count;
77 int filter_count;
78 int transition_count;
79 int pass;
80 mlt_properties producer_map;
81 };
82 typedef struct serialise_context_s* serialise_context;
83
84
85 static inline void serialise_properties( mlt_properties properties, xmlNode *node )
86 {
87 int i;
88 xmlNode *p;
89
90 // Enumerate the properties
91 for ( i = 0; i < mlt_properties_count( properties ); i++ )
92 {
93 char *name = mlt_properties_get_name( properties, i );
94 if ( name != NULL &&
95 name[ 0 ] != '_' &&
96 mlt_properties_get_value( properties, i ) != NULL &&
97 strcmp( name, "westley" ) != 0 )
98 {
99 #if 1
100 p = xmlNewChild( node, NULL, "property", NULL );
101 xmlNewProp( p, "name", mlt_properties_get_name( properties, i ) );
102 xmlNodeSetContent( p, mlt_properties_get_value( properties, i ) );
103 #else
104 p = node;
105 xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
106 #endif
107 }
108 }
109 }
110
111 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
112 {
113 int i;
114 xmlNode *child = node;
115 char id[ ID_SIZE + 1 ];
116 char key[ 11 ];
117 id[ ID_SIZE ] = '\0';
118 key[ 10 ] = '\0';
119
120 // Iterate over consumer/producer connections
121 while ( service != NULL )
122 {
123 mlt_properties properties = mlt_service_properties( service );
124 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
125
126 // Tell about the producer
127 if ( strcmp( mlt_type, "producer" ) == 0 )
128 {
129 if ( context->pass == 0 )
130 {
131 child = xmlNewChild( node, NULL, "producer", NULL );
132
133 // Set the id
134 if ( mlt_properties_get( properties, "id" ) == NULL )
135 {
136 snprintf( id, ID_SIZE, "producer%d", context->producer_count++ );
137 xmlNewProp( child, "id", id );
138 }
139 else
140 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
141 serialise_properties( properties, child );
142
143 // Add producer to the map
144 snprintf( key, 10, "%p", service );
145 mlt_properties_set( context->producer_map, key, id );
146 }
147 else
148 {
149 snprintf( key, 10, "%p", service );
150 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
151 }
152 if ( mlt_properties_get( properties, "westley" ) != NULL )
153 break;
154 }
155
156 // Tell about the framework container producers
157 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
158 {
159 // Recurse on multitrack's tracks
160 if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
161 {
162 if ( context->pass == 0 )
163 {
164 // Iterate over the tracks
165 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
166 {
167 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
168 }
169 }
170 else
171 {
172 // Iterate over the tracks to collect the producers
173 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
174 {
175 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
176 }
177
178 child = xmlNewChild( node, NULL, "multitrack", NULL );
179
180 // Set the id
181 if ( mlt_properties_get( properties, "id" ) == NULL )
182 {
183 snprintf( id, ID_SIZE, "multitrack%d", context->multitrack_count++ );
184 xmlNewProp( child, "id", id );
185 }
186
187 // Iterate over the tracks
188 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
189 {
190 xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
191 snprintf( key, 10, "%p", MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ) );
192 xmlNewProp( track, "producer", mlt_properties_get( context->producer_map, key ) );
193 }
194 }
195 break;
196 }
197
198 // Recurse on playlist's clips
199 else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
200 {
201 mlt_playlist_clip_info info;
202
203 if ( context->pass == 0 )
204 {
205 // Iterate over the playlist entries to collect the producers
206 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
207 {
208 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
209 {
210 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) != 0 )
211 {
212 serialise_service( context, MLT_SERVICE( info.producer ), node );
213 }
214 }
215 }
216
217 child = xmlNewChild( node, NULL, "playlist", NULL );
218
219 // Set the id
220 if ( mlt_properties_get( properties, "id" ) == NULL )
221 {
222 snprintf( id, ID_SIZE, "playlist%d", context->playlist_count++ );
223 xmlNewProp( child, "id", id );
224 }
225 else
226 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
227
228 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
229 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
230
231 // Add producer to the map
232 snprintf( key, 10, "%p", service );
233 mlt_properties_set( context->producer_map, key, id );
234
235 // Iterate over the playlist entries
236 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
237 {
238 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
239 {
240 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
241 {
242 char length[ 20 ];
243 length[ 19 ] = '\0';
244 xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
245 snprintf( length, 19, "%lld", info.frame_count );
246 xmlNewProp( entry, "length", length );
247 }
248 else
249 {
250 xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
251 snprintf( key, 10, "%p", MLT_SERVICE( info.producer ) );
252 xmlNewProp( entry, "producer", mlt_properties_get( context->producer_map, key ) );
253 }
254 }
255 }
256 }
257 else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
258 {
259 snprintf( key, 10, "%p", service );
260 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
261 }
262 }
263
264 // Recurse on tractor's producer
265 else if ( strcmp( mlt_properties_get( properties, "resource" ), "<tractor>" ) == 0 )
266 {
267 if ( context->pass == 0 )
268 {
269 // Recurse on connected producer
270 serialise_service( context, mlt_service_get_producer( service ), node );
271 }
272 else
273 {
274 child = xmlNewChild( node, NULL, "tractor", NULL );
275
276 // Set the id
277 if ( mlt_properties_get( properties, "id" ) == NULL )
278 {
279 snprintf( id, ID_SIZE, "tractor%d", context->tractor_count++ );
280 xmlNewProp( child, "id", id );
281 }
282
283 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
284 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
285
286 // Recurse on connected producer
287 serialise_service( context, mlt_service_get_producer( service ), child );
288 }
289 break;
290 }
291 }
292
293 // Tell about a filter
294 else if ( strcmp( mlt_type, "filter" ) == 0 )
295 {
296 // Recurse on connected producer
297 serialise_service( context, MLT_SERVICE( MLT_FILTER( service )->producer ), node );
298
299 if ( context->pass == 1 )
300 {
301 child = xmlNewChild( node, NULL, "filter", NULL );
302
303 // Set the id
304 if ( mlt_properties_get( properties, "id" ) == NULL )
305 {
306 snprintf( id, ID_SIZE, "filter%d", context->filter_count++ );
307 xmlNewProp( child, "id", id );
308 }
309
310 serialise_properties( properties, child );
311 }
312 break;
313 }
314
315 // Tell about a transition
316 else if ( strcmp( mlt_type, "transition" ) == 0 )
317 {
318 // Recurse on connected producer
319 serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
320
321 if ( context->pass == 1 )
322 {
323 child = xmlNewChild( node, NULL, "transition", NULL );
324
325 // Set the id
326 if ( mlt_properties_get( properties, "id" ) == NULL )
327 {
328 snprintf( id, ID_SIZE, "transition%d", context->transition_count++ );
329 xmlNewProp( child, "id", id );
330 }
331
332 serialise_properties( properties, child );
333 }
334 break;
335 }
336
337 // Get the next connected service
338 service = mlt_service_get_producer( service );
339 }
340 }
341
342 static int consumer_start( mlt_consumer this )
343 {
344 mlt_service inigo = NULL;
345 xmlDoc *doc = xmlNewDoc( "1.0" );
346 xmlNode *root = xmlNewNode( NULL, "westley" );
347 xmlDocSetRootElement( doc, root );
348
349 // Get the producer service
350 mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
351 if ( service != NULL )
352 {
353 struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
354 context->producer_map = mlt_properties_new();
355
356 // Remember inigo
357 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
358 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
359 inigo = service;
360
361 // Ensure producer is a framework producer
362 mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
363
364 // In pass one, we serialise the end producers and playlists,
365 // adding them to a map keyed by address.
366 serialise_service( context, service, root );
367
368 // In pass two, we serialise the tractor and reference the
369 // producers and playlists
370 context->pass++;
371 serialise_service( context, service, root );
372
373 mlt_properties_close( context->producer_map );
374 free( context );
375
376 if ( mlt_properties_get( mlt_consumer_properties( this ), "resource" ) == NULL )
377 xmlDocFormatDump( stdout, doc, 1 );
378 else
379 xmlSaveFormatFile( mlt_properties_get( mlt_consumer_properties( this ), "resource" ), doc, 1 );
380 }
381
382 xmlFreeDoc( doc );
383 mlt_consumer_stop( this );
384
385 return 0;
386 }
387
388 static int consumer_is_stopped( mlt_consumer this )
389 {
390 return 1;
391 }
392
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