research.m1stereo.tv/gitweb/ - melted/blob - src/modules/fezzik/producer_fezzik.c

   1 /*
   2  * producer_fezzik.c -- a normalising filter
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   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 "producer_fezzik.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include <framework/mlt.h>
  28
  29 static void track_service( mlt_tractor tractor, void *service, mlt_destructor destructor )
  30 {
  31         mlt_properties properties = mlt_tractor_properties( tractor );
  32         int registered = mlt_properties_get_int( properties, "_registered" );
  33         char *key = mlt_properties_get( properties, "_registered" );
  34         char *real = malloc( strlen( key ) + 2 );
  35         sprintf( real, "_%s", key );
  36         mlt_properties_set_data( properties, real, service, 0, destructor, NULL );
  37         mlt_properties_set_int( properties, "_registered", ++ registered );
  38         free( real );
  39 }
  40
  41 static mlt_producer create_producer( char *file )
  42 {
  43         mlt_producer result = NULL;
  44
  45         // 1st Line preferences
  46         if ( strstr( file, ".inigo" ) )
  47                 result = mlt_factory_producer( "inigo_file", file );
  48         else if ( strstr( file, ".mpg" ) )
  49                 result = mlt_factory_producer( "mcmpeg", file );
  50         else if ( strstr( file, ".mpeg" ) )
  51                 result = mlt_factory_producer( "mcmpeg", file );
  52         else if ( strstr( file, ".dv" ) )
  53                 result = mlt_factory_producer( "mcdv", file );
  54         else if ( strstr( file, ".dif" ) )
  55                 result = mlt_factory_producer( "mcdv", file );
  56         else if ( strstr( file, ".jpg" ) )
  57                 result = mlt_factory_producer( "pixbuf", file );
  58         else if ( strstr( file, ".JPG" ) )
  59                 result = mlt_factory_producer( "pixbuf", file );
  60         else if ( strstr( file, ".jpeg" ) )
  61                 result = mlt_factory_producer( "pixbuf", file );
  62         else if ( strstr( file, ".png" ) )
  63                 result = mlt_factory_producer( "pixbuf", file );
  64         else if ( strstr( file, ".svg" ) )
  65                 result = mlt_factory_producer( "pixbuf", file );
  66         else if ( strstr( file, ".txt" ) )
  67                 result = mlt_factory_producer( "pango", file );
  68         else if ( strstr( file, ".westley" ) )
  69                 result = mlt_factory_producer( "westley", file );
  70         else if ( strstr( file, ".ogg" ) )
  71                 result = mlt_factory_producer( "vorbis", file );
  72
  73         // 2nd Line fallbacks
  74         if ( result == NULL )
  75         {
  76                 if ( strstr( file, ".dv" ) )
  77                         result = mlt_factory_producer( "libdv", file );
  78                 else if ( strstr( file, ".dif" ) )
  79                         result = mlt_factory_producer( "libdv", file );
  80         }
  81
  82         // 3rd line fallbacks
  83         if ( result == NULL )
  84                 result = mlt_factory_producer( "avformat", file );
  85
  86         // 4th - allow explicit construction
  87         if ( result == NULL )
  88                 result = mlt_factory_producer( file, NULL );
  89
  90         return result;
  91 }
  92
  93 static mlt_service create_filter( mlt_tractor tractor, mlt_service last, char *effect )
  94 {
  95         char *id = strdup( effect );
  96         char *arg = strchr( id, ':' );
  97         if ( arg != NULL )
  98                 *arg ++ = '\0';
  99         mlt_filter filter = mlt_factory_filter( id, arg );
 100         if ( filter != NULL )
 101         {
 102                 mlt_filter_connect( filter, last, 0 );
 103                 track_service( tractor, filter, ( mlt_destructor )mlt_filter_close );
 104                 last = mlt_filter_service( filter );
 105         }
 106         free( id );
 107         return last;
 108 }
 109
 110 mlt_producer producer_fezzik_init( char *arg )
 111 {
 112         // Create the producer that the tractor will contain
 113         mlt_producer producer = NULL;
 114         if ( arg != NULL )
 115                 producer = create_producer( arg );
 116
 117         // Build the tractor if we have a producer and it isn't already westley'd :-)
 118         if ( producer != NULL && mlt_properties_get( mlt_producer_properties( producer ), "westley" ) == NULL )
 119         {
 120                 // Construct the tractor
 121                 mlt_tractor tractor = mlt_tractor_init( );
 122
 123                 // Sanity check
 124                 if ( tractor != NULL )
 125                 {
 126                         // Extract the tractor properties
 127                         mlt_properties properties = mlt_tractor_properties( tractor );
 128
 129                         // Our producer will be the last service
 130                         mlt_service last = mlt_producer_service( producer );
 131
 132                         // Set the registered count
 133                         mlt_properties_set_int( properties, "_registered", 0 );
 134
 135                         // Register our producer for seeking in the tractor
 136                         mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 137
 138                         // Now attach normalising filters
 139                         last = create_filter( tractor, last, "deinterlace" );
 140                         last = create_filter( tractor, last, "rescale" );
 141                         last = create_filter( tractor, last, "resize" );
 142                         last = create_filter( tractor, last, "resample" );
 143
 144                         // Connect the tractor to the last
 145                         mlt_tractor_connect( tractor, last );
 146
 147                         // Finally, inherit properties from producer
 148                         mlt_properties_inherit( properties, mlt_producer_properties( producer ) );
 149
 150                         // Now make sure we don't lose our inherited identity
 151                         mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
 152
 153                         // This is a temporary hack to ensure that westley doesn't dig too deep
 154                         // and fezzik doesn't overdo it with throwing rocks...
 155                         mlt_properties_set( properties, "westley", "was here" );
 156
 157                         // We need to ensure that all further properties are mirrored in the producer
 158                         mlt_properties_mirror( properties, mlt_producer_properties( producer ) );
 159
 160                         // Now, we return the producer of the tractor
 161                         producer = mlt_tractor_producer( tractor );
 162                 }
 163         }
 164
 165         // Return the tractor's producer
 166         return producer;
 167 }
 168