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