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 /** Forward references to static functions.
  30 */
  31
  32 static int consumer_start( mlt_consumer parent );
  33
  34 /** This is what will be called by the factory - anything can be passed in
  35         via the argument, but keep it simple.
  36 */
  37
  38 mlt_consumer consumer_westley_init( char *arg )
  39 {
  40         // Create the consumer object
  41         mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
  42
  43         // If no malloc'd and consumer init ok
  44         if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
  45         {
  46                 // We have stuff to clean up, so override the close method
  47                 //parent->close = consumer_close;
  48
  49                 // Allow thread to be started/stopped
  50                 this->start = consumer_start;
  51
  52                 mlt_properties_set( mlt_consumer_properties( this ), "resource", arg );
  53
  54                 // Return the consumer produced
  55                 return this;
  56         }
  57
  58         // malloc or consumer init failed
  59         free( this );
  60
  61         // Indicate failure
  62         return NULL;
  63 }
  64
  65
  66 // This maintains counters for adding ids to elements
  67 struct serialise_context_s
  68 {
  69         int producer_count;
  70         int multitrack_count;
  71         int playlist_count;
  72         int tractor_count;
  73         int filter_count;
  74         int transition_count;
  75 };
  76 typedef struct serialise_context_s* serialise_context;
  77
  78
  79 static inline void serialise_properties( mlt_properties properties, xmlNode *node )
  80 {
  81         int i;
  82         xmlNode *p;
  83
  84         // Enumerate the properties
  85         for ( i = 0; i < mlt_properties_count( properties ); i++ )
  86         {
  87                 if ( mlt_properties_get_value( properties, i ) != NULL )
  88                 {
  89 #if 0
  90                         p = xmlNewChild( node, NULL, "prop", NULL );
  91 #else
  92                         p = node;
  93 #endif
  94                         xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
  95                 }
  96         }
  97 }
  98
  99 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 100 {
 101         int i;
 102         xmlNode *child = node;
 103         char id[ 31 ];
 104         id[ 30 ] = '\0';
 105
 106         // Iterate over consumer/producer connections
 107         while ( service != NULL )
 108         {
 109                 mlt_properties properties = mlt_service_properties( service );
 110                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 111
 112                 // Tell about the producer
 113                 if ( strcmp( mlt_type, "producer" ) == 0 )
 114                 {
 115                         child = xmlNewChild( node, NULL, "producer", NULL );
 116
 117                         // Set the id
 118                         if ( mlt_properties_get( properties, "id" ) == NULL )
 119                         {
 120                                 snprintf( id, 30, "producer%d", context->producer_count++ );
 121                                 xmlNewProp( child, "id", id );
 122                         }
 123
 124             serialise_properties( properties, child );
 125                 }
 126
 127                 // Tell about the framework container producers
 128                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 129                 {
 130                         // Recurse on multitrack's tracks
 131                         if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
 132                         {
 133                                 child = xmlNewChild( node, NULL, "multitrack", NULL );
 134
 135                                 // Set the id
 136                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 137                                 {
 138                                         snprintf( id, 30, "multitrack%d", context->multitrack_count++ );
 139                                         xmlNewProp( child, "id", id );
 140                                 }
 141
 142                                 // Iterate over the tracks
 143                                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 144                                 {
 145                                         xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
 146                                         serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), track );
 147                                 }
 148                                 break;
 149                         }
 150
 151                         // Recurse on playlist's clips
 152                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
 153                         {
 154                                 mlt_playlist_clip_info info;
 155                                 child = xmlNewChild( node, NULL, "playlist", NULL );
 156
 157                                 // Set the id
 158                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 159                                 {
 160                                         snprintf( id, 30, "playlist%d", context->playlist_count++ );
 161                                         xmlNewProp( child, "id", id );
 162                                 }
 163
 164                                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 165                                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 166
 167                                 // Iterate over the playlist entries
 168                                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 169                                 {
 170                                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 171                                         {
 172                                                 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
 173                                                 {
 174                                                         char length[ 20 ];
 175                                                         length[ 19 ] = '\0';
 176                                                         xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 177                                                         snprintf( length, 19, "%lld", info.frame_count );
 178                                                         xmlNewProp( entry, "length", length );
 179                                                 }
 180                                                 else
 181                                                 {
 182                                                         xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 183                                                         serialise_service( context, MLT_SERVICE( info.producer ), entry );
 184                                                 }
 185                                         }
 186                                 }
 187                         }
 188
 189                         // Recurse on tractor's producer
 190                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<tractor>" ) == 0 )
 191                         {
 192                                 child = xmlNewChild( node, NULL, "tractor", NULL );
 193
 194                                 // Set the id
 195                                 if ( mlt_properties_get( properties, "id" ) == NULL )
 196                                 {
 197                                         snprintf( id, 30, "tractor%d", context->tractor_count++ );
 198                                         xmlNewProp( child, "id", id );
 199                                 }
 200
 201                                 // Recurse on connected producer
 202                                 serialise_service( context, mlt_service_get_producer( service ), child );
 203
 204                                 break;
 205                         }
 206                 }
 207
 208                 // Tell about a filter
 209                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 210                 {
 211                         // Recurse on connected producer
 212                         serialise_service( context, MLT_SERVICE( MLT_FILTER( service )->producer ), node );
 213
 214                         child = xmlNewChild( node, NULL, "filter", NULL );
 215
 216                         // Set the id
 217                         if ( mlt_properties_get( properties, "id" ) == NULL )
 218                         {
 219                                 snprintf( id, 30, "filter%d", context->filter_count++ );
 220                                 xmlNewProp( child, "id", id );
 221                         }
 222
 223                         serialise_properties( properties, child );
 224
 225                         break;
 226                 }
 227
 228                 // Tell about a transition
 229                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 230                 {
 231                         // Recurse on connected producer
 232                         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 233
 234                         child = xmlNewChild( node, NULL, "transition", NULL );
 235
 236                         // Set the id
 237                         if ( mlt_properties_get( properties, "id" ) == NULL )
 238                         {
 239                                 snprintf( id, 30, "transition%d", context->transition_count++ );
 240                                 xmlNewProp( child, "id", id );
 241                         }
 242
 243                         serialise_properties( properties, child );
 244
 245                         break;
 246                 }
 247
 248                 // Get the next connected service
 249                 service = mlt_service_get_producer( service );
 250         }
 251 }
 252
 253 static int consumer_start( mlt_consumer this )
 254 {
 255         mlt_service inigo = NULL;
 256         xmlDoc *doc = xmlNewDoc( "1.0" );
 257         xmlNode *root = xmlNewNode( NULL, "westley" );
 258         xmlDocSetRootElement( doc, root );
 259
 260         // Get the producer service
 261         mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
 262         if ( service != NULL )
 263         {
 264                 struct serialise_context_s context;
 265                 memset( &context, 0, sizeof( struct serialise_context_s ) );
 266
 267                 // Remember inigo
 268                 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
 269                                 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
 270                         inigo = service;
 271
 272                 // Ensure producer is a framework producer
 273                 mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
 274
 275                 serialise_service( &context, service, root );
 276
 277                 if ( mlt_properties_get( mlt_consumer_properties( this ), "resource" ) == NULL )
 278                         xmlDocFormatDump( stderr, doc, 1 );
 279                 else
 280                         xmlSaveFormatFile( mlt_properties_get( mlt_consumer_properties( this ), "resource" ), doc, 1 );
 281         }
 282
 283         xmlFreeDoc( doc );
 284         mlt_consumer_stop( this );
 285
 286         // Tell inigo, enough already!
 287         if ( inigo != NULL )
 288                 mlt_properties_set_int( mlt_service_properties( inigo ), "done", 1 );
 289
 290         return 0;
 291 }
 292