research.m1stereo.tv/gitweb/ - melted/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 <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                 // Allow thread to be started/stopped
  50                 this->start = consumer_start;
  51                 this->is_stopped = consumer_is_stopped;
  52
  53                 mlt_properties_set( mlt_consumer_properties( this ), "resource", arg );
  54
  55                 // Return the consumer produced
  56                 return this;
  57         }
  58
  59         // malloc or consumer init failed
  60         free( this );
  61
  62         // Indicate failure
  63         return NULL;
  64 }
  65
  66
  67 // This maintains counters for adding ids to elements
  68 struct serialise_context_s
  69 {
  70         int producer_count;
  71         int multitrack_count;
  72         int playlist_count;
  73         int tractor_count;
  74         int filter_count;
  75         int transition_count;
  76         int pass;
  77         mlt_properties producer_map;
  78 };
  79 typedef struct serialise_context_s* serialise_context;
  80
  81
  82 static inline void serialise_properties( mlt_properties properties, xmlNode *node )
  83 {
  84         int i;
  85         xmlNode *p;
  86
  87         // Enumerate the properties
  88         for ( i = 0; i < mlt_properties_count( properties ); i++ )
  89         {
  90                 char *name = mlt_properties_get_name( properties, i );
  91                 if ( name != NULL &&
  92                          name[ 0 ] != '_' &&
  93                          mlt_properties_get_value( properties, i ) != NULL &&
  94                          strcmp( name, "westley" ) != 0 &&
  95                          strcmp( name, "in" ) != 0 &&
  96                          strcmp( name, "out" ) != 0 )
  97                 {
  98                         p = xmlNewChild( node, NULL, "property", NULL );
  99                         xmlNewProp( p, "name", mlt_properties_get_name( properties, i ) );
 100                         xmlNodeSetContent( p, mlt_properties_get_value( properties, i ) );
 101                 }
 102         }
 103 }
 104
 105 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 106 {
 107         int i;
 108         xmlNode *child = node;
 109         char id[ ID_SIZE + 1 ];
 110         char key[ 11 ];
 111         id[ ID_SIZE ] = '\0';
 112         key[ 10 ] = '\0';
 113
 114         // Iterate over consumer/producer connections
 115         while ( service != NULL )
 116         {
 117                 mlt_properties properties = mlt_service_properties( service );
 118                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 119
 120                 // Tell about the producer
 121                 if ( strcmp( mlt_type, "producer" ) == 0 )
 122                 {
 123                         if ( context->pass == 0 )
 124                         {
 125                                 child = xmlNewChild( node, NULL, "producer", NULL );
 126
 127                                 // Set the id
 128                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 129                                 {
 130                                         snprintf( id, ID_SIZE, "producer%d", context->producer_count++ );
 131                                         xmlNewProp( child, "id", id );
 132                                 }
 133                                 else
 134                                         strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 135                                 serialise_properties( properties, child );
 136
 137                                 // Add producer to the map
 138                                 snprintf( key, 10, "%p", service );
 139                                 mlt_properties_set( context->producer_map, key, id );
 140                         }
 141                         else
 142                         {
 143                                 snprintf( key, 10, "%p", service );
 144                                 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
 145                         }
 146                         if ( mlt_properties_get( properties, "westley" ) != NULL )
 147                                 break;
 148                 }
 149
 150                 // Tell about the framework container producers
 151                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 152                 {
 153                         // Recurse on multitrack's tracks
 154                         if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
 155                         {
 156                                 if ( context->pass == 0 )
 157                                 {
 158                                         // Iterate over the tracks
 159                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 160                                         {
 161                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 162                                         }
 163                                 }
 164                                 else
 165                                 {
 166                                         // Iterate over the tracks to collect the producers
 167                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 168                                         {
 169                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 170                                         }
 171
 172                                         child = xmlNewChild( node, NULL, "multitrack", NULL );
 173
 174                                         // Set the id
 175                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 176                                         {
 177                                                 snprintf( id, ID_SIZE, "multitrack%d", context->multitrack_count++ );
 178                                                 xmlNewProp( child, "id", id );
 179                                         }
 180
 181                                         // Iterate over the tracks
 182                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 183                                         {
 184                                                 xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
 185                                                 snprintf( key, 10, "%p", MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ) );
 186                                                 xmlNewProp( track, "producer", mlt_properties_get( context->producer_map, key ) );
 187                                         }
 188                                 }
 189                                 break;
 190                         }
 191
 192                         // Recurse on playlist's clips
 193                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
 194                         {
 195                                 mlt_playlist_clip_info info;
 196
 197                                 if ( context->pass == 0 )
 198                                 {
 199                                         // Iterate over the playlist entries to collect the producers
 200                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 201                                         {
 202                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 203                                                 {
 204                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) != 0 )
 205                                                         {
 206                                                                 serialise_service( context, MLT_SERVICE( info.producer ), node );
 207                                                         }
 208                                                 }
 209                                         }
 210
 211                                         child = xmlNewChild( node, NULL, "playlist", NULL );
 212
 213                                         // Set the id
 214                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 215                                         {
 216                                                 snprintf( id, ID_SIZE, "playlist%d", context->playlist_count++ );
 217                                                 xmlNewProp( child, "id", id );
 218                                         }
 219                                         else
 220                                                 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 221
 222                                         // Add producer to the map
 223                                         snprintf( key, 10, "%p", service );
 224                                         mlt_properties_set( context->producer_map, key, id );
 225
 226                                         // Iterate over the playlist entries
 227                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 228                                         {
 229                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 230                                                 {
 231                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
 232                                                         {
 233                                                                 char length[ 20 ];
 234                                                                 length[ 19 ] = '\0';
 235                                                                 xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 236                                                                 snprintf( length, 19, "%d", info.frame_count );
 237                                                                 xmlNewProp( entry, "length", length );
 238                                                         }
 239                                                         else
 240                                                         {
 241                                                                 xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 242                                                                 snprintf( key, 10, "%p", MLT_SERVICE( info.producer ) );
 243                                                                 xmlNewProp( entry, "producer", mlt_properties_get( context->producer_map, key ) );
 244                                                                 xmlNewProp( entry, "in", mlt_properties_get( mlt_producer_properties( info.producer ), "in" ) );
 245                                                                 xmlNewProp( entry, "out", mlt_properties_get( mlt_producer_properties( info.producer ), "out" ) );
 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                                         xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 302                                         xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 303                                 }
 304
 305                                 serialise_properties( properties, child );
 306                         }
 307                         break;
 308                 }
 309
 310                 // Tell about a transition
 311                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 312                 {
 313                         // Recurse on connected producer
 314                         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 315
 316                         if ( context->pass == 1 )
 317                         {
 318                                 child = xmlNewChild( node, NULL, "transition", NULL );
 319
 320                                 // Set the id
 321                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 322                                 {
 323                                         snprintf( id, ID_SIZE, "transition%d", context->transition_count++ );
 324                                         xmlNewProp( child, "id", id );
 325                                         xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 326                                         xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 327                                 }
 328
 329                                 serialise_properties( properties, child );
 330                         }
 331                         break;
 332                 }
 333
 334                 // Get the next connected service
 335                 service = mlt_service_get_producer( service );
 336         }
 337 }
 338
 339 static int consumer_start( mlt_consumer this )
 340 {
 341         mlt_service inigo = NULL;
 342         xmlDoc *doc = xmlNewDoc( "1.0" );
 343         xmlNode *root = xmlNewNode( NULL, "westley" );
 344         xmlDocSetRootElement( doc, root );
 345
 346         // Get the producer service
 347         mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
 348         if ( service != NULL )
 349         {
 350                 struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 351                 context->producer_map = mlt_properties_new();
 352
 353                 // Remember inigo
 354                 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
 355                                 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
 356                         inigo = service;
 357
 358                 // Ensure producer is a framework producer
 359                 mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
 360
 361                 // In pass one, we serialise the end producers and playlists,
 362                 // adding them to a map keyed by address.
 363                 serialise_service( context, service, root );
 364
 365                 // In pass two, we serialise the tractor and reference the
 366                 // producers and playlists
 367                 context->pass++;
 368                 serialise_service( context, service, root );
 369
 370                 mlt_properties_close( context->producer_map );
 371                 free( context );
 372
 373                 if ( mlt_properties_get( mlt_consumer_properties( this ), "resource" ) == NULL )
 374                         xmlDocFormatDump( stdout, doc, 1 );
 375                 else
 376                         xmlSaveFormatFile( mlt_properties_get( mlt_consumer_properties( this ), "resource" ), doc, 1 );
 377         }
 378
 379         xmlFreeDoc( doc );
 380         mlt_consumer_stop( this );
 381
 382         return 0;
 383 }
 384
 385 static int consumer_is_stopped( mlt_consumer this )
 386 {
 387         return 1;
 388 }
 389