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                         ( strncmp( file, "avformat:", 9 ) ? 0 : 9 ) );
  86
  87         // 4th - allow explicit construction
  88         if ( result == NULL )
  89         {
  90                 char *arg = strchr( file, ':' );
  91                 if ( arg )
  92                 {
  93                         arg[0] = 0;
  94                         arg++;
  95                 }
  96                 result = mlt_factory_producer( file, arg );
  97         }
  98
  99         return result;
 100 }
 101
 102 static mlt_service create_filter( mlt_tractor tractor, mlt_service last, char *effect )
 103 {
 104         char *id = strdup( effect );
 105         char *arg = strchr( id, ':' );
 106         if ( arg != NULL )
 107                 *arg ++ = '\0';
 108         mlt_filter filter = mlt_factory_filter( id, arg );
 109         if ( filter != NULL )
 110         {
 111                 mlt_filter_connect( filter, last, 0 );
 112                 track_service( tractor, filter, ( mlt_destructor )mlt_filter_close );
 113                 last = mlt_filter_service( filter );
 114         }
 115         free( id );
 116         return last;
 117 }
 118
 119 mlt_producer producer_fezzik_init( char *arg )
 120 {
 121         // Create the producer that the tractor will contain
 122         mlt_producer producer = NULL;
 123         if ( arg != NULL )
 124                 producer = create_producer( arg );
 125
 126         // Build the tractor if we have a producer and it isn't already westley'd :-)
 127         if ( producer != NULL && mlt_properties_get( mlt_producer_properties( producer ), "westley" ) == NULL )
 128         {
 129                 // Construct the tractor
 130                 mlt_tractor tractor = mlt_tractor_init( );
 131
 132                 // Sanity check
 133                 if ( tractor != NULL )
 134                 {
 135                         // Extract the tractor properties
 136                         mlt_properties properties = mlt_tractor_properties( tractor );
 137
 138                         // Our producer will be the last service
 139                         mlt_service last = mlt_producer_service( producer );
 140
 141                         // Set the registered count
 142                         mlt_properties_set_int( properties, "_registered", 0 );
 143
 144                         // Register our producer for seeking in the tractor
 145                         mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 146
 147                         // Now attach normalising filters
 148                         last = create_filter( tractor, last, "deinterlace" );
 149                         last = create_filter( tractor, last, "rescale" );
 150                         last = create_filter( tractor, last, "resize" );
 151                         last = create_filter( tractor, last, "resample" );
 152
 153                         // Connect the tractor to the last
 154                         mlt_tractor_connect( tractor, last );
 155
 156                         // Finally, inherit properties from producer
 157                         mlt_properties_inherit( properties, mlt_producer_properties( producer ) );
 158
 159                         // Now make sure we don't lose our inherited identity
 160                         mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
 161
 162                         // This is a temporary hack to ensure that westley doesn't dig too deep
 163                         // and fezzik doesn't overdo it with throwing rocks...
 164                         mlt_properties_set( properties, "westley", "was here" );
 165
 166                         // We need to ensure that all further properties are mirrored in the producer
 167                         mlt_properties_mirror( properties, mlt_producer_properties( producer ) );
 168
 169                         // Now, we return the producer of the tractor
 170                         producer = mlt_tractor_producer( tractor );
 171                 }
 172         }
 173
 174         // Return the tractor's producer
 175         return producer;
 176 }