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
  36 /** This is what will be called by the factory - anything can be passed in
  37         via the argument, but keep it simple.
  38 */
  39
  40 mlt_consumer consumer_westley_init( char *arg )
  41 {
  42         // Create the consumer object
  43         mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
  44
  45         // If no malloc'd and consumer init ok
  46         if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
  47         {
  48                 // We have stuff to clean up, so override the close method
  49                 //parent->close = consumer_close;
  50
  51                 // Allow thread to be started/stopped
  52                 this->start = consumer_start;
  53
  54                 mlt_properties_set( mlt_consumer_properties( this ), "resource", arg );
  55
  56                 // Return the consumer produced
  57                 return this;
  58         }
  59
  60         // malloc or consumer init failed
  61         free( this );
  62
  63         // Indicate failure
  64         return NULL;
  65 }
  66
  67
  68 // This maintains counters for adding ids to elements
  69 struct serialise_context_s
  70 {
  71         int producer_count;
  72         int multitrack_count;
  73         int playlist_count;
  74         int tractor_count;
  75         int filter_count;
  76         int transition_count;
  77         int pass;
  78         mlt_properties producer_map;
  79 };
  80 typedef struct serialise_context_s* serialise_context;
  81
  82
  83 static inline void serialise_properties( mlt_properties properties, xmlNode *node )
  84 {
  85         int i;
  86         xmlNode *p;
  87
  88         // Enumerate the properties
  89         for ( i = 0; i < mlt_properties_count( properties ); i++ )
  90         {
  91                 char *name = mlt_properties_get_name( properties, i );
  92                 if ( name != NULL &&
  93                          name[ 0 ] != '_' &&
  94                          mlt_properties_get_value( properties, i ) != NULL &&
  95                          strcmp( name, "westley" ) != 0 )
  96                 {
  97 #if 0
  98                         p = xmlNewChild( node, NULL, "prop", NULL );
  99 #else
 100                         p = node;
 101 #endif
 102                         xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
 103                 }
 104         }
 105 }
 106
 107 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 108 {
 109         int i;
 110         xmlNode *child = node;
 111         char id[ ID_SIZE + 1 ];
 112         char key[ 11 ];
 113         id[ ID_SIZE ] = '\0';
 114         key[ 10 ] = '\0';
 115
 116         // Iterate over consumer/producer connections
 117         while ( service != NULL )
 118         {
 119                 mlt_properties properties = mlt_service_properties( service );
 120                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 121
 122                 // Tell about the producer
 123                 if ( strcmp( mlt_type, "producer" ) == 0 )
 124                 {
 125                         if ( context->pass == 0 )
 126                         {
 127                                 child = xmlNewChild( node, NULL, "producer", NULL );
 128
 129                                 // Set the id
 130                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 131                                 {
 132                                         snprintf( id, ID_SIZE, "producer%d", context->producer_count++ );
 133                                         xmlNewProp( child, "id", id );
 134                                 }
 135                                 else
 136                                         strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 137                                 serialise_properties( properties, child );
 138
 139                                 // Add producer to the map
 140                                 snprintf( key, 10, "%p", service );
 141                                 mlt_properties_set( context->producer_map, key, id );
 142                         }
 143                         else
 144                         {
 145                                 snprintf( key, 10, "%p", service );
 146                                 xmlNewProp( node, "producer", mlt_properties_get( context->producer_map, key ) );
 147                         }
 148                         if ( mlt_properties_get( properties, "westley" ) != NULL )
 149                                 break;
 150                 }
 151
 152                 // Tell about the framework container producers
 153                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 154                 {
 155                         // Recurse on multitrack's tracks
 156                         if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
 157                         {
 158                                 if ( context->pass == 0 )
 159                                 {
 160                                         // Iterate over the tracks
 161                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 162                                         {
 163                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 164                                         }
 165                                 }
 166                                 else
 167                                 {
 168                                         // Iterate over the tracks to collect the producers
 169                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 170                                         {
 171                                                 serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 172                                         }
 173
 174                                         child = xmlNewChild( node, NULL, "multitrack", NULL );
 175
 176                                         // Set the id
 177                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 178                                         {
 179                                                 snprintf( id, ID_SIZE, "multitrack%d", context->multitrack_count++ );
 180                                                 xmlNewProp( child, "id", id );
 181                                         }
 182
 183                                         // Iterate over the tracks
 184                                         for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 185                                         {
 186                                                 xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
 187                                                 snprintf( key, 10, "%p", MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ) );
 188                                                 xmlNewProp( track, "producer", mlt_properties_get( context->producer_map, key ) );
 189                                         }
 190                                 }
 191                                 break;
 192                         }
 193
 194                         // Recurse on playlist's clips
 195                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
 196                         {
 197                                 mlt_playlist_clip_info info;
 198
 199                                 if ( context->pass == 0 )
 200                                 {
 201                                         // Iterate over the playlist entries to collect the producers
 202                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 203                                         {
 204                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 205                                                 {
 206                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) != 0 )
 207                                                         {
 208                                                                 serialise_service( context, MLT_SERVICE( info.producer ), node );
 209                                                         }
 210                                                 }
 211                                         }
 212
 213                                         child = xmlNewChild( node, NULL, "playlist", NULL );
 214
 215                                         // Set the id
 216                                         if ( mlt_properties_get( properties, "id" ) == NULL )
 217                                         {
 218                                                 snprintf( id, ID_SIZE, "playlist%d", context->playlist_count++ );
 219                                                 xmlNewProp( child, "id", id );
 220                                         }
 221                                         else
 222                                                 strncpy( id, mlt_properties_get( properties, "id" ), ID_SIZE );
 223
 224                                         xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 225                                         xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 226
 227                                         // Add producer to the map
 228                                         snprintf( key, 10, "%p", service );
 229                                         mlt_properties_set( context->producer_map, key, id );
 230
 231                                         // Iterate over the playlist entries
 232                                         for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 233                                         {
 234                                                 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 235                                                 {
 236                                                         if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
 237                                                         {
 238                                                                 char length[ 20 ];
 239                                                                 length[ 19 ] = '\0';
 240                                                                 xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 241                                                                 snprintf( length, 19, "%lld", info.frame_count );
 242                                                                 xmlNewProp( entry, "length", length );
 243                                                         }
 244                                                         else
 245                                                         {
 246                                                                 xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 247                                                                 snprintf( key, 10, "%p", MLT_SERVICE( info.producer ) );
 248                                                                 xmlNewProp( entry, "producer", mlt_properties_get( context->producer_map, key ) );
 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         // Tell inigo, enough already!
 382         if ( inigo != NULL )
 383                 mlt_properties_set_int( mlt_service_properties( inigo ), "done", 1 );
 384
 385         return 0;
 386 }
 387