git.sesse.net Git - mlt/blob - 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 <unistd.h>
  28 #include <libxml/tree.h>
  29
  30 #define ID_SIZE 128
  31
  32 // This maintains counters for adding ids to elements
  33 struct serialise_context_s
  34 {
  35         mlt_properties id_map;
  36         int producer_count;
  37         int multitrack_count;
  38         int playlist_count;
  39         int tractor_count;
  40         int filter_count;
  41         int transition_count;
  42         int pass;
  43         mlt_properties hide_map;
  44         char *root;
  45         char *store;
  46 };
  47 typedef struct serialise_context_s* serialise_context;
  48
  49 /** Forward references to static functions.
  50 */
  51
  52 static int consumer_start( mlt_consumer parent );
  53 static int consumer_is_stopped( mlt_consumer this );
  54 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node );
  55
  56 typedef enum
  57 {
  58         westley_existing,
  59         westley_producer,
  60         westley_multitrack,
  61         westley_playlist,
  62         westley_tractor,
  63         westley_filter,
  64         westley_transition
  65 }
  66 westley_type;
  67
  68 /** Create or retrieve an id associated to this service.
  69 */
  70
  71 static char *westley_get_id( serialise_context context, mlt_service service, westley_type type )
  72 {
  73         char *id = NULL;
  74         int i = 0;
  75         mlt_properties map = context->id_map;
  76
  77         // Search the map for the service
  78         for ( i = 0; i < mlt_properties_count( map ); i ++ )
  79                 if ( mlt_properties_get_data_at( map, i, NULL ) == service )
  80                         break;
  81
  82         // If the service is not in the map, and the type indicates a new id is needed...
  83         if ( i >= mlt_properties_count( map ) && type != westley_existing )
  84         {
  85                 // Attempt to reuse existing id
  86                 id = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "id" );
  87
  88                 // If no id, or the id is used in the map (for another service), then
  89                 // create a new one.
  90                 if ( id == NULL || mlt_properties_get_data( map, id, NULL ) != NULL )
  91                 {
  92                         char temp[ ID_SIZE ];
  93                         do
  94                         {
  95                                 switch( type )
  96                                 {
  97                                         case westley_producer:
  98                                                 sprintf( temp, "producer%d", context->producer_count ++ );
  99                                                 break;
 100                                         case westley_multitrack:
 101                                                 sprintf( temp, "multitrack%d", context->multitrack_count ++ );
 102                                                 break;
 103                                         case westley_playlist:
 104                                                 sprintf( temp, "playlist%d", context->playlist_count ++ );
 105                                                 break;
 106                                         case westley_tractor:
 107                                                 sprintf( temp, "tractor%d", context->tractor_count ++ );
 108                                                 break;
 109                                         case westley_filter:
 110                                                 sprintf( temp, "filter%d", context->filter_count ++ );
 111                                                 break;
 112                                         case westley_transition:
 113                                                 sprintf( temp, "transition%d", context->transition_count ++ );
 114                                                 break;
 115                                         case westley_existing:
 116                                                 // Never gets here
 117                                                 break;
 118                                 }
 119                         }
 120                         while( mlt_properties_get_data( map, temp, NULL ) != NULL );
 121
 122                         // Set the data at the generated name
 123                         mlt_properties_set_data( map, temp, service, 0, NULL, NULL );
 124
 125                         // Get the pointer to the name (i is the end of the list)
 126                         id = mlt_properties_get_name( map, i );
 127                 }
 128                 else
 129                 {
 130                         // Store the existing id in the map
 131                         mlt_properties_set_data( map, id, service, 0, NULL, NULL );
 132                 }
 133         }
 134         else if ( type == westley_existing )
 135         {
 136                 id = mlt_properties_get_name( map, i );
 137         }
 138
 139         return id;
 140 }
 141
 142 /** This is what will be called by the factory - anything can be passed in
 143         via the argument, but keep it simple.
 144 */
 145
 146 mlt_consumer consumer_westley_init( char *arg )
 147 {
 148         // Create the consumer object
 149         mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
 150
 151         // If no malloc'd and consumer init ok
 152         if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
 153         {
 154                 // Allow thread to be started/stopped
 155                 this->start = consumer_start;
 156                 this->is_stopped = consumer_is_stopped;
 157
 158                 mlt_properties_set( MLT_CONSUMER_PROPERTIES( this ), "resource", arg );
 159
 160                 // Return the consumer produced
 161                 return this;
 162         }
 163
 164         // malloc or consumer init failed
 165         free( this );
 166
 167         // Indicate failure
 168         return NULL;
 169 }
 170
 171 static void serialise_properties( serialise_context context, mlt_properties properties, xmlNode *node )
 172 {
 173         int i;
 174         xmlNode *p;
 175
 176         // Enumerate the properties
 177         for ( i = 0; i < mlt_properties_count( properties ); i++ )
 178         {
 179                 char *name = mlt_properties_get_name( properties, i );
 180                 if ( name != NULL &&
 181                          name[ 0 ] != '_' &&
 182                          mlt_properties_get_value( properties, i ) != NULL &&
 183                          strcmp( name, "westley" ) != 0 &&
 184                          strcmp( name, "in" ) != 0 &&
 185                          strcmp( name, "out" ) != 0 &&
 186                          strcmp( name, "id" ) != 0 &&
 187                          strcmp( name, "root" ) != 0 &&
 188                          strcmp( name, "width" ) != 0 &&
 189                          strcmp( name, "height" ) != 0 )
 190                 {
 191                         char *value = mlt_properties_get_value( properties, i );
 192                         p = xmlNewChild( node, NULL, "property", NULL );
 193                         xmlNewProp( p, "name", mlt_properties_get_name( properties, i ) );
 194                         if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
 195                                 xmlNodeSetContent( p, value + strlen( context->root ) + 1 );
 196                         else
 197                                 xmlNodeSetContent( p, value );
 198                 }
 199         }
 200 }
 201
 202 static void serialise_store_properties( serialise_context context, mlt_properties properties, xmlNode *node, char *store )
 203 {
 204         int i;
 205         xmlNode *p;
 206
 207         // Enumerate the properties
 208         for ( i = 0; store != NULL && i < mlt_properties_count( properties ); i++ )
 209         {
 210                 char *name = mlt_properties_get_name( properties, i );
 211                 if ( !strncmp( name, store, strlen( store ) ) )
 212                 {
 213                         char *value = mlt_properties_get_value( properties, i );
 214                         if ( value != NULL )
 215                         {
 216                                 p = xmlNewChild( node, NULL, "property", NULL );
 217                                 xmlNewProp( p, "name", mlt_properties_get_name( properties, i ) );
 218                                 if ( context->root != NULL && strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
 219                                         xmlNodeSetContent( p, value + strlen( context->root ) + 1 );
 220                                 else
 221                                         xmlNodeSetContent( p, value );
 222                         }
 223                 }
 224         }
 225 }
 226
 227 static inline void serialise_service_filters( serialise_context context, mlt_service service, xmlNode *node )
 228 {
 229         int i;
 230         xmlNode *p;
 231         mlt_filter filter = NULL;
 232
 233         // Enumerate the filters
 234         for ( i = 0; ( filter = mlt_producer_filter( MLT_PRODUCER( service ), i ) ) != NULL; i ++ )
 235         {
 236                 mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
 237                 if ( mlt_properties_get_int( properties, "_fezzik" ) == 0 )
 238                 {
 239                         // Get a new id - if already allocated, do nothing
 240                         char *id = westley_get_id( context, MLT_FILTER_SERVICE( filter ), westley_filter );
 241                         if ( id != NULL )
 242                         {
 243                                 int in = mlt_properties_get_position( properties, "in" );
 244                                 int out = mlt_properties_get_position( properties, "out" );
 245                                 p = xmlNewChild( node, NULL, "filter", NULL );
 246                                 xmlNewProp( p, "id", id );
 247                                 if ( in != 0 || out != 0 )
 248                                 {
 249                                         char temp[ 20 ];
 250                                         sprintf( temp, "%d", in );
 251                                         xmlNewProp( p, "in", temp );
 252                                         sprintf( temp, "%d", out );
 253                                         xmlNewProp( p, "out", temp );
 254                                 }
 255                                 serialise_properties( context, properties, p );
 256                                 serialise_service_filters( context, MLT_FILTER_SERVICE( filter ), p );
 257                         }
 258                 }
 259         }
 260 }
 261
 262 static void serialise_producer( serialise_context context, mlt_service service, xmlNode *node )
 263 {
 264         xmlNode *child = node;
 265         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( MLT_PRODUCER( service ) ) );
 266
 267         if ( context->pass == 0 )
 268         {
 269                 mlt_properties properties = MLT_SERVICE_PROPERTIES( parent );
 270                 // Get a new id - if already allocated, do nothing
 271                 char *id = westley_get_id( context, parent, westley_producer );
 272                 if ( id == NULL )
 273                         return;
 274
 275                 child = xmlNewChild( node, NULL, "producer", NULL );
 276
 277                 // Set the id
 278                 xmlNewProp( child, "id", id );
 279                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 280                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 281                 serialise_properties( context, properties, child );
 282                 serialise_service_filters( context, service, child );
 283
 284                 // Add producer to the map
 285                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 286         }
 287         else
 288         {
 289                 char *id = westley_get_id( context, parent, westley_existing );
 290                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 291                 xmlNewProp( node, "parent", id );
 292                 xmlNewProp( node, "in", mlt_properties_get( properties, "in" ) );
 293                 xmlNewProp( node, "out", mlt_properties_get( properties, "out" ) );
 294         }
 295 }
 296
 297 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node );
 298
 299 static void serialise_multitrack( serialise_context context, mlt_service service, xmlNode *node )
 300 {
 301         int i;
 302
 303         if ( context->pass == 0 )
 304         {
 305                 // Iterate over the tracks to collect the producers
 306                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 307                 {
 308                         mlt_producer producer = mlt_producer_cut_parent( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) );
 309                         serialise_service( context, MLT_SERVICE( producer ), node );
 310                 }
 311         }
 312         else
 313         {
 314                 // Get a new id - if already allocated, do nothing
 315                 char *id = westley_get_id( context, service, westley_multitrack );
 316                 if ( id == NULL )
 317                         return;
 318
 319                 // Serialise the tracks
 320                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 321                 {
 322                         xmlNode *track = xmlNewChild( node, NULL, "track", NULL );
 323                         int hide = 0;
 324                         mlt_producer producer = mlt_multitrack_track( MLT_MULTITRACK( service ), i );
 325                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 326
 327                         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( producer ) );
 328
 329                         char *id = westley_get_id( context, MLT_SERVICE( parent ), westley_existing );
 330                         xmlNewProp( track, "producer", id );
 331                         if ( mlt_producer_is_cut( producer ) )
 332                         {
 333                                 xmlNewProp( track, "in", mlt_properties_get( properties, "in" ) );
 334                                 xmlNewProp( track, "out", mlt_properties_get( properties, "out" ) );
 335                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, context->store );
 336                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, "meta." );
 337                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( producer ), track );
 338                         }
 339
 340                         hide = mlt_properties_get_int( context->hide_map, id );
 341                         if ( hide )
 342                                 xmlNewProp( track, "hide", hide == 1 ? "video" : ( hide == 2 ? "audio" : "both" ) );
 343                 }
 344                 serialise_service_filters( context, service, node );
 345         }
 346 }
 347
 348 static void serialise_playlist( serialise_context context, mlt_service service, xmlNode *node )
 349 {
 350         int i;
 351         xmlNode *child = node;
 352         mlt_playlist_clip_info info;
 353         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 354
 355         if ( context->pass == 0 )
 356         {
 357                 // Get a new id - if already allocated, do nothing
 358                 char *id = westley_get_id( context, service, westley_playlist );
 359                 if ( id == NULL )
 360                         return;
 361
 362                 // Iterate over the playlist entries to collect the producers
 363                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 364                 {
 365                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 366                         {
 367                                 if ( info.producer != NULL )
 368                                 {
 369                                         mlt_producer producer = mlt_producer_cut_parent( info.producer );
 370                                         char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 371                                         char *resource_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "resource" );
 372                                         if ( resource_s != NULL && !strcmp( resource_s, "<playlist>" ) )
 373                                                 serialise_playlist( context, MLT_SERVICE( producer ), node );
 374                                         else if ( service_s != NULL && strcmp( service_s, "blank" ) != 0 )
 375                                                 serialise_service( context, MLT_SERVICE( producer ), node );
 376                                 }
 377                         }
 378                 }
 379
 380                 child = xmlNewChild( node, NULL, "playlist", NULL );
 381
 382                 // Set the id
 383                 xmlNewProp( child, "id", id );
 384
 385                 // Store application specific properties
 386                 serialise_store_properties( context, properties, child, context->store );
 387                 serialise_store_properties( context, properties, child, "meta." );
 388
 389                 // Add producer to the map
 390                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 391
 392                 // Iterate over the playlist entries
 393                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 394                 {
 395                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 396                         {
 397                                 mlt_producer producer = mlt_producer_cut_parent( info.producer );
 398                                 char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 399                                 if ( service_s != NULL && strcmp( service_s, "blank" ) == 0 )
 400                                 {
 401                                         char length[ 20 ];
 402                                         length[ 19 ] = '\0';
 403                                         xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 404                                         snprintf( length, 19, "%d", info.frame_count );
 405                                         xmlNewProp( entry, "length", length );
 406                                 }
 407                                 else
 408                                 {
 409                                         char temp[ 20 ];
 410                                         xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 411                                         id = westley_get_id( context, MLT_SERVICE( producer ), westley_existing );
 412                                         xmlNewProp( entry, "producer", id );
 413                                         sprintf( temp, "%d", info.frame_in );
 414                                         xmlNewProp( entry, "in", temp );
 415                                         sprintf( temp, "%d", info.frame_out );
 416                                         xmlNewProp( entry, "out", temp );
 417                                         if ( info.repeat > 1 )
 418                                         {
 419                                                 sprintf( temp, "%d", info.repeat );
 420                                                 xmlNewProp( entry, "repeat", temp );
 421                                         }
 422                                         if ( mlt_producer_is_cut( info.cut ) )
 423                                         {
 424                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, context->store );
 425                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, "meta." );
 426                                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( info.cut ), entry );
 427                                         }
 428                                 }
 429                         }
 430                 }
 431
 432                 serialise_service_filters( context, service, child );
 433         }
 434         else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
 435         {
 436                 char *id = westley_get_id( context, service, westley_existing );
 437                 xmlNewProp( node, "producer", id );
 438         }
 439 }
 440
 441 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node )
 442 {
 443         xmlNode *child = node;
 444         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 445
 446         if ( context->pass == 0 )
 447         {
 448                 // Recurse on connected producer
 449                 serialise_service( context, mlt_service_producer( service ), node );
 450         }
 451         else
 452         {
 453                 // Get a new id - if already allocated, do nothing
 454                 char *id = westley_get_id( context, service, westley_tractor );
 455                 if ( id == NULL )
 456                         return;
 457
 458                 child = xmlNewChild( node, NULL, "tractor", NULL );
 459
 460                 // Set the id
 461                 xmlNewProp( child, "id", id );
 462                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 463                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 464
 465                 // Store application specific properties
 466                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, context->store );
 467                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, "meta." );
 468
 469                 // Recurse on connected producer
 470                 serialise_service( context, mlt_service_producer( service ), child );
 471                 serialise_service_filters( context, service, child );
 472         }
 473 }
 474
 475 static void serialise_filter( serialise_context context, mlt_service service, xmlNode *node )
 476 {
 477         xmlNode *child = node;
 478         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 479
 480         // Recurse on connected producer
 481         serialise_service( context, mlt_service_producer( service ), node );
 482
 483         if ( context->pass == 1 )
 484         {
 485                 // Get a new id - if already allocated, do nothing
 486                 char *id = westley_get_id( context, service, westley_filter );
 487                 if ( id == NULL )
 488                         return;
 489
 490                 child = xmlNewChild( node, NULL, "filter", NULL );
 491
 492                 // Set the id
 493                 xmlNewProp( child, "id", id );
 494                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 495                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 496
 497                 serialise_properties( context, properties, child );
 498                 serialise_service_filters( context, service, child );
 499         }
 500 }
 501
 502 static void serialise_transition( serialise_context context, mlt_service service, xmlNode *node )
 503 {
 504         xmlNode *child = node;
 505         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 506
 507         // Recurse on connected producer
 508         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 509
 510         if ( context->pass == 1 )
 511         {
 512                 // Get a new id - if already allocated, do nothing
 513                 char *id = westley_get_id( context, service, westley_transition );
 514                 if ( id == NULL )
 515                         return;
 516
 517                 child = xmlNewChild( node, NULL, "transition", NULL );
 518
 519                 // Set the id
 520                 xmlNewProp( child, "id", id );
 521                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 522                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 523
 524                 serialise_properties( context, properties, child );
 525                 serialise_service_filters( context, service, child );
 526         }
 527 }
 528
 529 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 530 {
 531         // Iterate over consumer/producer connections
 532         while ( service != NULL )
 533         {
 534                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 535                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 536
 537                 // Tell about the producer
 538                 if ( strcmp( mlt_type, "producer" ) == 0 )
 539                 {
 540                         char *mlt_service = mlt_properties_get( properties, "mlt_service" );
 541                         if ( mlt_properties_get( properties, "westley" ) == NULL && !strcmp( mlt_service, "tractor" ) )
 542                         {
 543                                 context->pass = 0;
 544                                 serialise_tractor( context, service, node );
 545                                 context->pass = 1;
 546                                 serialise_tractor( context, service, node );
 547                                 context->pass = 0;
 548                                 break;
 549                         }
 550                         else
 551                         {
 552                                 serialise_producer( context, service, node );
 553                         }
 554                         if ( mlt_properties_get( properties, "westley" ) != NULL )
 555                                 break;
 556                 }
 557
 558                 // Tell about the framework container producers
 559                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 560                 {
 561                         char *resource = mlt_properties_get( properties, "resource" );
 562
 563                         // Recurse on multitrack's tracks
 564                         if ( strcmp( resource, "<multitrack>" ) == 0 )
 565                         {
 566                                 serialise_multitrack( context, service, node );
 567                                 break;
 568                         }
 569
 570                         // Recurse on playlist's clips
 571                         else if ( strcmp( resource, "<playlist>" ) == 0 )
 572                         {
 573                                 serialise_playlist( context, service, node );
 574                         }
 575
 576                         // Recurse on tractor's producer
 577                         else if ( strcmp( resource, "<tractor>" ) == 0 )
 578                         {
 579                                 context->pass = 0;
 580                                 serialise_tractor( context, service, node );
 581                                 context->pass = 1;
 582                                 serialise_tractor( context, service, node );
 583                                 context->pass = 0;
 584                                 break;
 585                         }
 586
 587                         // Treat it as a normal producer
 588                         else
 589                         {
 590                                 serialise_producer( context, service, node );
 591                         }
 592                 }
 593
 594                 // Tell about a filter
 595                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 596                 {
 597                         serialise_filter( context, service, node );
 598                         break;
 599                 }
 600
 601                 // Tell about a transition
 602                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 603                 {
 604                         serialise_transition( context, service, node );
 605                         break;
 606                 }
 607
 608                 // Get the next connected service
 609                 service = mlt_service_producer( service );
 610         }
 611 }
 612
 613 xmlDocPtr westley_make_doc( mlt_consumer consumer, mlt_service service )
 614 {
 615         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 616         xmlDocPtr doc = xmlNewDoc( "1.0" );
 617         xmlNodePtr root = xmlNewNode( NULL, "westley" );
 618         struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 619
 620         xmlDocSetRootElement( doc, root );
 621
 622         // If we have root, then deal with it now
 623         if ( mlt_properties_get( properties, "root" ) != NULL )
 624         {
 625                 xmlNewProp( root, "root", mlt_properties_get( properties, "root" ) );
 626                 context->root = strdup( mlt_properties_get( properties, "root" ) );
 627         }
 628         else
 629         {
 630                 context->root = strdup( "" );
 631         }
 632
 633         // Assign the additional 'storage' pattern for properties
 634         context->store = mlt_properties_get( MLT_CONSUMER_PROPERTIES( consumer ), "store" );
 635
 636         // Assign a title property
 637         if ( mlt_properties_get( properties, "title" ) != NULL )
 638                 xmlNewProp( root, "title", mlt_properties_get( properties, "title" ) );
 639
 640         // Construct the context maps
 641         context->id_map = mlt_properties_new();
 642         context->hide_map = mlt_properties_new();
 643
 644         // Ensure producer is a framework producer
 645         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "mlt_type", "mlt_producer" );
 646
 647         // In pass one, we serialise the end producers and playlists,
 648         // adding them to a map keyed by address.
 649         serialise_service( context, service, root );
 650
 651         // In pass two, we serialise the tractor and reference the
 652         // producers and playlists
 653         context->pass++;
 654         serialise_service( context, service, root );
 655
 656         // Cleanup resource
 657         mlt_properties_close( context->id_map );
 658         mlt_properties_close( context->hide_map );
 659         free( context->root );
 660         free( context );
 661
 662         return doc;
 663 }
 664
 665 static int consumer_start( mlt_consumer this )
 666 {
 667         xmlDocPtr doc = NULL;
 668
 669         // Get the producer service
 670         mlt_service service = mlt_service_producer( MLT_CONSUMER_SERVICE( this ) );
 671         if ( service != NULL )
 672         {
 673                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 674                 char *resource =  mlt_properties_get( properties, "resource" );
 675
 676                 // Set the title if provided
 677                 if ( mlt_properties_get( properties, "title" ) )
 678                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", mlt_properties_get( properties, "title" ) );
 679                 else if ( mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "title" ) == NULL )
 680                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", "Anonymous Submission" );
 681
 682                 // Check for a root on the consumer properties and pass to service
 683                 if ( mlt_properties_get( properties, "root" ) )
 684                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", mlt_properties_get( properties, "root" ) );
 685
 686                 // Specify roots in other cases...
 687                 if ( resource != NULL && mlt_properties_get( properties, "root" ) == NULL )
 688                 {
 689                         // Get the current working directory
 690                         char *cwd = getcwd( NULL, 0 );
 691                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", cwd );
 692                         free( cwd );
 693                 }
 694
 695                 // Make the document
 696                 doc = westley_make_doc( this, service );
 697
 698                 // Handle the output
 699                 if ( resource == NULL || !strcmp( resource, "" ) )
 700                 {
 701                         xmlDocFormatDump( stdout, doc, 1 );
 702                 }
 703                 else if ( strchr( resource, '.' ) == NULL )
 704                 {
 705                         xmlChar *buffer = NULL;
 706                         int length = 0;
 707                         xmlDocDumpMemory( doc, &buffer, &length );
 708                         mlt_properties_set( properties, resource, buffer );
 709                         xmlFree( buffer );
 710                 }
 711                 else
 712                 {
 713                         xmlSaveFormatFile( resource, doc, 1 );
 714                 }
 715
 716                 // Close the document
 717                 xmlFreeDoc( doc );
 718         }
 719
 720         mlt_consumer_stop( this );
 721
 722         mlt_consumer_stopped( this );
 723
 724         return 0;
 725 }
 726
 727 static int consumer_is_stopped( mlt_consumer this )
 728 {
 729         return 1;
 730 }