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                 {
  96 #if 1
  97                         p = xmlNewChild( node, NULL, "property", NULL );
  98                         xmlNewProp( p, "name", mlt_properties_get_name( properties, i ) );
  99                         xmlNodeSetContent( p, mlt_properties_get_value( properties, i ) );
 100 #else
 101                         p = node;
 102                         xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
 103 #endif
 104                 }
 105         }
 106 }
 107
 108 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 109 {
 110         int i;
 111         xmlNode *child = node;
 112         char id[ ID_SIZE + 1 ];
 113         char key[ 11 ];
 114         id[ ID_SIZE ] = '\0';
 115         key[ 10 ] = '\0';
 116
 117         // Iterate over consumer/producer connections
 118         while ( service != NULL )
 119         {
 120                 mlt_properties properties = mlt_service_properties( service );
 121                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 122
 123                 // Tell about the producer
 124                 if ( strcmp( mlt_type, "producer" ) == 0 )
 125                 {
 126                         if ( context->pass == 0 )
 127                         {
 128                                 child = xmlNewChild( node, NULL, "producer", NULL );
 129
 130                                 // Set the id
 131                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 132                                 {
 133                                         snprintf( id, ID_SIZE, "producer%d", context->producer_count++ );
 134                                         xmlNewProp( child, "id", id );
 135                                 }
 136                                 else
 137                                         strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 138                                 serialise_properties( properties, child );
 139
 140                                 // Add producer to the map
 141                                 snprintf( key, 10, "%p", service );
 142                                 mlt_properties_set( context->producer_map, key, id );
 143                         }
 144                         else
 145                         {
 146                                 snprintf( key, 10, "%p", service );
 147                                 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
 148                         }
 149                         if ( mlt_properties_get( properties, "westley" ) != NULL )
 150                                 break;
 151                 }
 152
 153                 // Tell about the framework container producers
 154                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 155                 {
 156                         // Recurse on multitrack's tracks
 157                         if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
 158                         {
 159                                 if ( context->pass == 0 )
 160                                 {
 161                                         // Iterate over the tracks
 162                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 163                                         {
 164                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 165                                         }
 166                                 }
 167                                 else
 168                                 {
 169                                         // Iterate over the tracks to collect the producers
 170                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 171                                         {
 172                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 173                                         }
 174
 175                                         child = xmlNewChild( node, NULL, "multitrack", NULL );
 176
 177                                         // Set the id
 178                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 179                                         {
 180                                                 snprintf( id, ID_SIZE, "multitrack%d", context->multitrack_count++ );
 181                                                 xmlNewProp( child, "id", id );
 182                                         }
 183
 184                                         // Iterate over the tracks
 185                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 186                                         {
 187                                                 xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
 188                                                 snprintf( key, 10, "%p", MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ) );
 189                                                 xmlNewProp( track, "producer", mlt_properties_get( context->producer_map, key ) );
 190                                         }
 191                                 }
 192                                 break;
 193                         }
 194
 195                         // Recurse on playlist's clips
 196                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
 197                         {
 198                                 mlt_playlist_clip_info info;
 199
 200                                 if ( context->pass == 0 )
 201                                 {
 202                                         // Iterate over the playlist entries to collect the producers
 203                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 204                                         {
 205                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 206                                                 {
 207                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) != 0 )
 208                                                         {
 209                                                                 serialise_service( context, MLT_SERVICE( info.producer ), node );
 210                                                         }
 211                                                 }
 212                                         }
 213
 214                                         child = xmlNewChild( node, NULL, "playlist", NULL );
 215
 216                                         // Set the id
 217                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 218                                         {
 219                                                 snprintf( id, ID_SIZE, "playlist%d", context->playlist_count++ );
 220                                                 xmlNewProp( child, "id", id );
 221                                         }
 222                                         else
 223                                                 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 224
 225                                         // Add producer to the map
 226                                         snprintf( key, 10, "%p", service );
 227                                         mlt_properties_set( context->producer_map, key, id );
 228
 229                                         // Iterate over the playlist entries
 230                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 231                                         {
 232                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 233                                                 {
 234                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
 235                                                         {
 236                                                                 char length[ 20 ];
 237                                                                 length[ 19 ] = '\0';
 238                                                                 xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 239                                                                 snprintf( length, 19, "%lld", info.frame_count );
 240                                                                 xmlNewProp( entry, "length", length );
 241                                                         }
 242                                                         else
 243                                                         {
 244                                                                 xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 245                                                                 snprintf( key, 10, "%p", MLT_SERVICE( info.producer ) );
 246                                                                 xmlNewProp( entry, "producer", mlt_properties_get( context->producer_map, key ) );
 247                                                                 xmlNewProp( entry, "in", mlt_properties_get( mlt_producer_properties( info.producer ), "in" ) );
 248                                                                 xmlNewProp( entry, "out", mlt_properties_get( mlt_producer_properties( info.producer ), "out" ) );
 249                                                         }
 250                                                 }
 251                                         }
 252                                 }
 253                                 else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
 254                                 {
 255                                         snprintf( key, 10, "%p", service );
 256                                         xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
 257                                 }
 258                         }
 259
 260                         // Recurse on tractor's producer
 261                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<tractor>" ) == 0 )
 262                         {
 263                                 if ( context->pass == 0 )
 264                                 {
 265                                         // Recurse on connected producer
 266                                         serialise_service( context, mlt_service_get_producer( service ), node );
 267                                 }
 268                                 else
 269                                 {
 270                                         child = xmlNewChild( node, NULL, "tractor", NULL );
 271
 272                                         // Set the id
 273                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 274                                         {
 275                                                 snprintf( id, ID_SIZE, "tractor%d", context->tractor_count++ );
 276                                                 xmlNewProp( child, "id", id );
 277                                         }
 278
 279                                         xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 280                                         xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 281
 282                                         // Recurse on connected producer
 283                                         serialise_service( context, mlt_service_get_producer( service ), child );
 284                                 }
 285                                 break;
 286                         }
 287                 }
 288
 289                 // Tell about a filter
 290                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 291                 {
 292                         // Recurse on connected producer
 293                         serialise_service( context, MLT_SERVICE( MLT_FILTER( service )->producer ), node );
 294
 295                         if ( context->pass == 1 )
 296                         {
 297                                 child = xmlNewChild( node, NULL, "filter", NULL );
 298
 299                                 // Set the id
 300                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 301                                 {
 302                                         snprintf( id, ID_SIZE, "filter%d", context->filter_count++ );
 303                                         xmlNewProp( child, "id", id );
 304                                 }
 305
 306                                 serialise_properties( properties, child );
 307                         }
 308                         break;
 309                 }
 310
 311                 // Tell about a transition
 312                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 313                 {
 314                         // Recurse on connected producer
 315                         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 316
 317                         if ( context->pass == 1 )
 318                         {
 319                                 child = xmlNewChild( node, NULL, "transition", NULL );
 320
 321                                 // Set the id
 322                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 323                                 {
 324                                         snprintf( id, ID_SIZE, "transition%d", context->transition_count++ );
 325                                         xmlNewProp( child, "id", id );
 326                                 }
 327
 328                                 serialise_properties( properties, child );
 329                         }
 330                         break;
 331                 }
 332
 333                 // Get the next connected service
 334                 service = mlt_service_get_producer( service );
 335         }
 336 }
 337
 338 static int consumer_start( mlt_consumer this )
 339 {
 340         mlt_service inigo = NULL;
 341         xmlDoc *doc = xmlNewDoc( "1.0" );
 342         xmlNode *root = xmlNewNode( NULL, "westley" );
 343         xmlDocSetRootElement( doc, root );
 344
 345         // Get the producer service
 346         mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
 347         if ( service != NULL )
 348         {
 349                 struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 350                 context->producer_map = mlt_properties_new();
 351
 352                 // Remember inigo
 353                 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
 354                                 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
 355                         inigo = service;
 356
 357                 // Ensure producer is a framework producer
 358                 mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
 359
 360                 // In pass one, we serialise the end producers and playlists,
 361                 // adding them to a map keyed by address.
 362                 serialise_service( context, service, root );
 363
 364                 // In pass two, we serialise the tractor and reference the
 365                 // producers and playlists
 366                 context->pass++;
 367                 serialise_service( context, service, root );
 368
 369                 mlt_properties_close( context->producer_map );
 370                 free( context );
 371
 372                 if ( mlt_properties_get( mlt_consumer_properties( this ), "resource" ) == NULL )
 373                         xmlDocFormatDump( stdout, doc, 1 );
 374                 else
 375                         xmlSaveFormatFile( mlt_properties_get( mlt_consumer_properties( this ), "resource" ), doc, 1 );
 376         }
 377
 378         xmlFreeDoc( doc );
 379         mlt_consumer_stop( this );
 380
 381         return 0;
 382 }
 383
 384 static int consumer_is_stopped( mlt_consumer this )
 385 {
 386         return 1;
 387 }
 388