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                 // 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 0
 100                         p = xmlNewChild( node, NULL, "prop", NULL );
 101 #else
 102                         p = node;
 103 #endif
 104                         xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
 105                 }
 106         }
 107 }
 108
 109 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 110 {
 111         int i;
 112         xmlNode *child = node;
 113         char id[ ID_SIZE + 1 ];
 114         char key[ 11 ];
 115         id[ ID_SIZE ] = '\0';
 116         key[ 10 ] = '\0';
 117
 118         // Iterate over consumer/producer connections
 119         while ( service != NULL )
 120         {
 121                 mlt_properties properties = mlt_service_properties( service );
 122                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 123
 124                 // Tell about the producer
 125                 if ( strcmp( mlt_type, "producer" ) == 0 )
 126                 {
 127                         if ( context->pass == 0 )
 128                         {
 129                                 child = xmlNewChild( node, NULL, "producer", NULL );
 130
 131                                 // Set the id
 132                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 133                                 {
 134                                         snprintf( id, ID_SIZE, "producer%d", context->producer_count++ );
 135                                         xmlNewProp( child, "id", id );
 136                                 }
 137                                 else
 138                                         strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 139                                 serialise_properties( properties, child );
 140
 141                                 // Add producer to the map
 142                                 snprintf( key, 10, "%p", service );
 143                                 mlt_properties_set( context->producer_map, key, id );
 144                         }
 145                         else
 146                         {
 147                                 snprintf( key, 10, "%p", service );
 148                                 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
 149                         }
 150                         if ( mlt_properties_get( properties, "westley" ) != NULL )
 151                                 break;
 152                 }
 153
 154                 // Tell about the framework container producers
 155                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 156                 {
 157                         // Recurse on multitrack's tracks
 158                         if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
 159                         {
 160                                 if ( context->pass == 0 )
 161                                 {
 162                                         // Iterate over the tracks
 163                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 164                                         {
 165                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 166                                         }
 167                                 }
 168                                 else
 169                                 {
 170                                         // Iterate over the tracks to collect the producers
 171                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 172                                         {
 173                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 174                                         }
 175
 176                                         child = xmlNewChild( node, NULL, "multitrack", NULL );
 177
 178                                         // Set the id
 179                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 180                                         {
 181                                                 snprintf( id, ID_SIZE, "multitrack%d", context->multitrack_count++ );
 182                                                 xmlNewProp( child, "id", id );
 183                                         }
 184
 185                                         // Iterate over the tracks
 186                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 187                                         {
 188                                                 xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
 189                                                 snprintf( key, 10, "%p", MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ) );
 190                                                 xmlNewProp( track, "producer", mlt_properties_get( context->producer_map, key ) );
 191                                         }
 192                                 }
 193                                 break;
 194                         }
 195
 196                         // Recurse on playlist's clips
 197                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
 198                         {
 199                                 mlt_playlist_clip_info info;
 200
 201                                 if ( context->pass == 0 )
 202                                 {
 203                                         // Iterate over the playlist entries to collect the producers
 204                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 205                                         {
 206                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 207                                                 {
 208                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) != 0 )
 209                                                         {
 210                                                                 serialise_service( context, MLT_SERVICE( info.producer ), node );
 211                                                         }
 212                                                 }
 213                                         }
 214
 215                                         child = xmlNewChild( node, NULL, "playlist", NULL );
 216
 217                                         // Set the id
 218                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 219                                         {
 220                                                 snprintf( id, ID_SIZE, "playlist%d", context->playlist_count++ );
 221                                                 xmlNewProp( child, "id", id );
 222                                         }
 223                                         else
 224                                                 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 225
 226                                         xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 227                                         xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 228
 229                                         // Add producer to the map
 230                                         snprintf( key, 10, "%p", service );
 231                                         mlt_properties_set( context->producer_map, key, id );
 232
 233                                         // Iterate over the playlist entries
 234                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 235                                         {
 236                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 237                                                 {
 238                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
 239                                                         {
 240                                                                 char length[ 20 ];
 241                                                                 length[ 19 ] = '\0';
 242                                                                 xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 243                                                                 snprintf( length, 19, "%lld", info.frame_count );
 244                                                                 xmlNewProp( entry, "length", length );
 245                                                         }
 246                                                         else
 247                                                         {
 248                                                                 xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 249                                                                 snprintf( key, 10, "%p", MLT_SERVICE( info.producer ) );
 250                                                                 xmlNewProp( entry, "producer", mlt_properties_get( context->producer_map, key ) );
 251                                                         }
 252                                                 }
 253                                         }
 254                                 }
 255                                 else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
 256                                 {
 257                                         snprintf( key, 10, "%p", service );
 258                                         xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
 259                                 }
 260                         }
 261
 262                         // Recurse on tractor's producer
 263                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<tractor>" ) == 0 )
 264                         {
 265                                 if ( context->pass == 0 )
 266                                 {
 267                                         // Recurse on connected producer
 268                                         serialise_service( context, mlt_service_get_producer( service ), node );
 269                                 }
 270                                 else
 271                                 {
 272                                         child = xmlNewChild( node, NULL, "tractor", NULL );
 273
 274                                         // Set the id
 275                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 276                                         {
 277                                                 snprintf( id, ID_SIZE, "tractor%d", context->tractor_count++ );
 278                                                 xmlNewProp( child, "id", id );
 279                                         }
 280
 281                                         xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 282                                         xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 283
 284                                         // Recurse on connected producer
 285                                         serialise_service( context, mlt_service_get_producer( service ), child );
 286                                 }
 287                                 break;
 288                         }
 289                 }
 290
 291                 // Tell about a filter
 292                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 293                 {
 294                         // Recurse on connected producer
 295                         serialise_service( context, MLT_SERVICE( MLT_FILTER( service )->producer ), node );
 296
 297                         if ( context->pass == 1 )
 298                         {
 299                                 child = xmlNewChild( node, NULL, "filter", NULL );
 300
 301                                 // Set the id
 302                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 303                                 {
 304                                         snprintf( id, ID_SIZE, "filter%d", context->filter_count++ );
 305                                         xmlNewProp( child, "id", id );
 306                                 }
 307
 308                                 serialise_properties( properties, child );
 309                         }
 310                         break;
 311                 }
 312
 313                 // Tell about a transition
 314                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 315                 {
 316                         // Recurse on connected producer
 317                         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 318
 319                         if ( context->pass == 1 )
 320                         {
 321                                 child = xmlNewChild( node, NULL, "transition", NULL );
 322
 323                                 // Set the id
 324                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 325                                 {
 326                                         snprintf( id, ID_SIZE, "transition%d", context->transition_count++ );
 327                                         xmlNewProp( child, "id", id );
 328                                 }
 329
 330                                 serialise_properties( properties, child );
 331                         }
 332                         break;
 333                 }
 334
 335                 // Get the next connected service
 336                 service = mlt_service_get_producer( service );
 337         }
 338 }
 339
 340 static int consumer_start( mlt_consumer this )
 341 {
 342         mlt_service inigo = NULL;
 343         xmlDoc *doc = xmlNewDoc( "1.0" );
 344         xmlNode *root = xmlNewNode( NULL, "westley" );
 345         xmlDocSetRootElement( doc, root );
 346
 347         // Get the producer service
 348         mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
 349         if ( service != NULL )
 350         {
 351                 struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 352                 context->producer_map = mlt_properties_new();
 353
 354                 // Remember inigo
 355                 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
 356                                 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
 357                         inigo = service;
 358
 359                 // Ensure producer is a framework producer
 360                 mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
 361
 362                 // In pass one, we serialise the end producers and playlists,
 363                 // adding them to a map keyed by address.
 364                 serialise_service( context, service, root );
 365
 366                 // In pass two, we serialise the tractor and reference the
 367                 // producers and playlists
 368                 context->pass++;
 369                 serialise_service( context, service, root );
 370
 371                 mlt_properties_close( context->producer_map );
 372                 free( context );
 373
 374                 if ( mlt_properties_get( mlt_consumer_properties( this ), "resource" ) == NULL )
 375                         xmlDocFormatDump( stdout, doc, 1 );
 376                 else
 377                         xmlSaveFormatFile( mlt_properties_get( mlt_consumer_properties( this ), "resource" ), doc, 1 );
 378         }
 379
 380         xmlFreeDoc( doc );
 381         mlt_consumer_stop( this );
 382
 383         return 0;
 384 }
 385
 386 static int consumer_is_stopped( mlt_consumer this )
 387 {
 388         return 1;
 389 }
 390