research.m1stereo.tv/gitweb/ - melted/blob - mlt/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                 // Return the consumer produced
  53                 return this;
  54         }
  55
  56         // malloc or consumer init failed
  57         free( this );
  58
  59         // Indicate failure
  60         return NULL;
  61 }
  62
  63
  64 // This maintains counters for adding ids to elements
  65 struct serialise_context_s
  66 {
  67         int producer_count;
  68         int multitrack_count;
  69         int playlist_count;
  70         int tractor_count;
  71         int filter_count;
  72         int transition_count;
  73 };
  74 typedef struct serialise_context_s* serialise_context;
  75
  76
  77 static inline void serialise_properties( mlt_properties properties, xmlNode *node )
  78 {
  79         int i;
  80         xmlNode *p;
  81
  82         // Enumerate the properties
  83         for ( i = 0; i < mlt_properties_count( properties ); i++ )
  84         {
  85 #if 0
  86                 p = xmlNewChild( node, NULL, "prop", NULL );
  87 #else
  88                 p = node;
  89 #endif
  90                 xmlNewProp( p, mlt_properties_get_name( properties, i ), mlt_properties_get_value( properties, i ) );
  91         }
  92 }
  93
  94 static xmlNode* serialise_service( serialise_context context, mlt_service service, xmlNode *node )
  95 {
  96         int i;
  97         xmlNode *child = node;
  98         char id[ 31 ];
  99         id[ 30 ] = '\0';
 100
 101         // Iterate over consumer/producer connections
 102         while ( service != NULL )
 103         {
 104                 mlt_properties properties = mlt_service_properties( service );
 105                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 106
 107                 // Tell about the producer
 108                 if ( strcmp( mlt_type, "producer" ) == 0 )
 109                 {
 110                         child = xmlNewChild( node, NULL, "producer", NULL );
 111
 112                         // Set the id
 113                         if ( mlt_properties_get( properties, "id" ) != NULL )
 114                                 xmlNewProp( child, "id", mlt_properties_get( properties, "mlt_service" ) );
 115                         else
 116                         {
 117                                 snprintf( id, 30, "producer%d", context->producer_count++ );
 118                                 xmlNewProp( child, "id", id );
 119                         }
 120
 121                         //xmlNewProp( child, "type", mlt_properties_get( properties, "mlt_service" ) );
 122                         //xmlNewProp( child, "src", mlt_properties_get( properties, "resource" ) );
 123             serialise_properties( properties, child );
 124                 }
 125
 126                 // Tell about the framework container producers
 127                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 128                 {
 129                         // Recurse on multitrack's tracks
 130                         if ( strcmp( mlt_properties_get( properties, "resource" ), "<multitrack>" ) == 0 )
 131                         {
 132                                 child = xmlNewChild( node, NULL, "multitrack", NULL );
 133
 134                                 // Set the id
 135                                 if ( mlt_properties_get( properties, "id" ) != NULL )
 136                                         xmlNewProp( child, "id", mlt_properties_get( properties, "mlt_service" ) );
 137                                 else
 138                                 {
 139                                         snprintf( id, 30, "multitrack%d", context->multitrack_count++ );
 140                                         xmlNewProp( child, "id", id );
 141                                 }
 142
 143                                 // Iterate over the tracks
 144                                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 145                                 {
 146                                         xmlNode *track = xmlNewChild( child, NULL, "track", NULL );
 147                                         serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), track );
 148                                 }
 149                                 break;
 150                         }
 151
 152                         // Recurse on playlist's clips
 153                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<playlist>" ) == 0 )
 154                         {
 155                                 mlt_playlist_clip_info info;
 156                                 child = xmlNewChild( node, NULL, "playlist", NULL );
 157
 158                                 // Set the id
 159                                 if ( mlt_properties_get( properties, "id" ) != NULL )
 160                                         xmlNewProp( child, "id", mlt_properties_get( properties, "mlt_service" ) );
 161                                 else
 162                                 {
 163                                         snprintf( id, 30, "playlist%d", context->playlist_count++ );
 164                                         xmlNewProp( child, "id", id );
 165                                 }
 166
 167                                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 168                                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 169
 170                                 // Iterate over the playlist entries
 171                                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 172                                 {
 173                                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 174                                         {
 175                                                 if ( strcmp( mlt_properties_get( mlt_producer_properties( info.producer ), "mlt_service" ), "blank" ) == 0 )
 176                                                 {
 177                                                         char length[ 20 ];
 178                                                         length[ 19 ] = '\0';
 179                                                         xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 180                                                         snprintf( length, 19, "%lld", info.length );
 181                                                         xmlNewProp( entry, "length", length );
 182                                                 }
 183                                                 else
 184                                                 {
 185                                                         xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 186                                                         serialise_service( context, MLT_SERVICE( info.producer ), entry );
 187                                                 }
 188                                         }
 189                                 }
 190                         }
 191
 192                         // Recurse on tractor's producer
 193                         else if ( strcmp( mlt_properties_get( properties, "resource" ), "<tractor>" ) == 0 )
 194                         {
 195                                 child = xmlNewChild( node, NULL, "tractor", NULL );
 196
 197                                 // Set the id
 198                                 if ( mlt_properties_get( properties, "id" ) != NULL )
 199                                         xmlNewProp( child, "id", mlt_properties_get( properties, "mlt_service" ) );
 200                                 else
 201                                 {
 202                                         snprintf( id, 30, "tractor%d", context->tractor_count++ );
 203                                         xmlNewProp( child, "id", id );
 204                                 }
 205
 206                                 // Recurse on connected producer
 207                                 serialise_service( context, mlt_service_get_producer( service ), child );
 208
 209                                 break;
 210                         }
 211                 }
 212
 213                 // Tell about a filter
 214                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 215                 {
 216                         // Recurse on connected producer
 217                         child = serialise_service( context, MLT_SERVICE( MLT_FILTER( service )->producer ), node );
 218
 219                         // sanity check
 220                         if ( child == NULL )
 221                                 break;
 222
 223                         node = xmlNewChild( child, NULL, "filter", NULL );
 224
 225                         // Set the id
 226                         if ( mlt_properties_get( properties, "id" ) != NULL )
 227                                 xmlNewProp( node, "id", mlt_properties_get( properties, "mlt_service" ) );
 228                         else
 229                         {
 230                                 snprintf( id, 30, "filter%d", context->filter_count++ );
 231                                 xmlNewProp( node, "id", id );
 232                         }
 233
 234                         //xmlNewProp( node, "type", mlt_properties_get( properties, "mlt_service" ) );
 235
 236                         serialise_properties( properties, node );
 237
 238                         break;
 239                 }
 240
 241                 // Tell about a transition
 242                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 243                 {
 244                         // Recurse on connected producer
 245                         child = serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 246
 247                         // sanity check
 248                         if ( child == NULL )
 249                                 break;
 250
 251                         node = xmlNewChild( child, NULL, "transition", NULL );
 252
 253                         // Set the id
 254                         if ( mlt_properties_get( properties, "id" ) != NULL )
 255                                 xmlNewProp( node, "id", mlt_properties_get( properties, "mlt_service" ) );
 256                         else
 257                         {
 258                                 snprintf( id, 30, "transition%d", context->transition_count++ );
 259                                 xmlNewProp( node, "id", id );
 260                         }
 261
 262                         //xmlNewProp( node, "type", mlt_properties_get( properties, "mlt_service" ) );
 263
 264                         serialise_properties( properties, node );
 265
 266                         break;
 267                 }
 268
 269                 // Get the next connected service
 270                 service = mlt_service_get_producer( service );
 271         }
 272         return child;
 273 }
 274
 275 static int consumer_start( mlt_consumer this )
 276 {
 277         mlt_service inigo = NULL;
 278         xmlDoc *doc = xmlNewDoc( "1.0" );
 279         xmlNode *root = xmlNewNode( NULL, "westley" );
 280         xmlDocSetRootElement( doc, root );
 281
 282         // Get the producer service
 283         mlt_service service = mlt_service_get_producer( mlt_consumer_service( this ) );
 284         if ( service != NULL )
 285         {
 286                 struct serialise_context_s context;
 287                 memset( &context, 0, sizeof( struct serialise_context_s ) );
 288
 289                 // Remember inigo
 290                 if ( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ) != NULL &&
 291                                 strcmp( mlt_properties_get( mlt_service_properties( service ), "mlt_service" ), "inigo" ) == 0 )
 292                 {
 293                         inigo = service;
 294
 295                         // Turn inigo's producer into a framework producer
 296                         mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
 297                 }
 298
 299                 serialise_service( &context, service, root );
 300                 xmlDocFormatDump( stderr, doc, 1 );
 301         }
 302
 303         xmlFreeDoc( doc );
 304         mlt_consumer_stop( this );
 305
 306         // Tell inigo, enough already!
 307         if ( inigo != NULL )
 308                 mlt_properties_set_int( mlt_service_properties( inigo ), "done", 1 );
 309
 310         return 0;
 311 }
 312