research.m1stereo.tv/gitweb/ - melted/blob - src/tests/hello.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <framework/mlt.h>
   4
   5 mlt_producer create_playlist( int argc, char **argv )
   6 {
   7         // We're creating a playlist here
   8         mlt_playlist playlist = mlt_playlist_init( );
   9
  10         // We need the playlist properties to ensure clean up
  11         mlt_properties properties = mlt_playlist_properties( playlist );
  12
  13         // Loop through each of the arguments
  14         int i = 0;
  15         for ( i = 1; i < argc; i ++ )
  16         {
  17                 // Definie the unique key
  18                 char key[ 256 ];
  19
  20                 // Create the producer
  21                 mlt_producer producer = mlt_factory_producer( NULL, argv[ i ] );
  22
  23                 // Add it to the playlist
  24                 mlt_playlist_append( playlist, producer );
  25
  26                 // Create a unique key for this producer
  27                 sprintf( key, "producer%d", i );
  28
  29                 // Now we need to ensure the producers are destroyed
  30                 mlt_properties_set_data( properties, key, producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
  31         }
  32
  33         // Return the playlist as a producer
  34         return mlt_playlist_producer( playlist );
  35 }
  36
  37 mlt_producer create_tracks( int argc, char **argv )
  38 {
  39         // Create the field
  40         mlt_field field = mlt_field_init( );
  41
  42         // Obtain the multitrack
  43         mlt_multitrack multitrack = mlt_field_multitrack( field );
  44
  45         // Obtain the tractor
  46         mlt_tractor tractor = mlt_field_tractor( field );
  47
  48         // Obtain a composite transition
  49         mlt_transition transition = mlt_factory_transition( "composite", "10%,10%:15%x15%" );
  50
  51         // Create track 0
  52         mlt_producer track0 = create_playlist( argc, argv );
  53
  54         // Get the length of track0
  55         mlt_position length = mlt_producer_get_playtime( track0 );
  56
  57         // Create the watermark track
  58         mlt_producer track1 = mlt_factory_producer( "fezzik", "pango:" );
  59
  60         // Get the properties of track1
  61         mlt_properties properties = mlt_producer_properties( track1 );
  62
  63         // Set the properties
  64         mlt_properties_set( properties, "text", "Hello\nWorld" );
  65         mlt_properties_set_position( properties, "in", 0 );
  66         mlt_properties_set_position( properties, "out", length - 1 );
  67         mlt_properties_set_position( properties, "length", length );
  68
  69         // Now set the properties on the transition
  70         properties = mlt_transition_properties( transition );
  71         mlt_properties_set_position( properties, "in", 0 );
  72         mlt_properties_set_position( properties, "out", length - 1 );
  73
  74         // Add our tracks to the multitrack
  75         mlt_multitrack_connect( multitrack, track0, 0 );
  76         mlt_multitrack_connect( multitrack, track1, 1 );
  77
  78         // Now plant the transition
  79         mlt_field_plant_transition( field, transition, 0, 1 );
  80
  81         // Now set the properties on the transition
  82         properties = mlt_tractor_properties( tractor );
  83
  84         // Ensure clean up and set properties correctly
  85         mlt_properties_set_data( properties, "multitrack", multitrack, 0, ( mlt_destructor )mlt_multitrack_close, NULL );
  86         mlt_properties_set_data( properties, "field", field, 0, ( mlt_destructor )mlt_field_close, NULL );
  87         mlt_properties_set_data( properties, "track0", track0, 0, ( mlt_destructor )mlt_producer_close, NULL );
  88         mlt_properties_set_data( properties, "track1", track1, 0, ( mlt_destructor )mlt_producer_close, NULL );
  89         mlt_properties_set_data( properties, "transition", transition, 0, ( mlt_destructor )mlt_transition_close, NULL );
  90         mlt_properties_set_position( properties, "length", length );
  91         mlt_properties_set_position( properties, "out", length - 1 );
  92
  93         // Return the tractor
  94         return mlt_tractor_producer( tractor );
  95 }
  96
  97 int main( int argc, char **argv )
  98 {
  99         // Initialise the factory
 100         if ( mlt_factory_init( NULL ) == 0 )
 101         {
 102                 // Create the default consumer
 103                 mlt_consumer hello = mlt_factory_consumer( NULL, NULL );
 104
 105                 // Create a producer using the default normalising selecter
 106                 mlt_producer world = create_tracks( argc, argv );
 107
 108                 // Connect the producer to the consumer
 109                 mlt_consumer_connect( hello, mlt_producer_service( world ) );
 110
 111                 // Start the consumer
 112                 mlt_consumer_start( hello );
 113
 114                 // Wait for the consumer to terminate
 115                 while( !mlt_consumer_is_stopped( hello ) )
 116                         sleep( 1 );
 117
 118                 // Close the consumer
 119                 mlt_consumer_close( hello );
 120
 121                 // Close the producer
 122                 mlt_producer_close( world );
 123
 124                 // Close the factory
 125                 mlt_factory_close( );
 126         }
 127         else
 128         {
 129                 // Report an error during initialisation
 130                 fprintf( stderr, "Unable to locate factory modules\n" );
 131         }
 132
 133         // End of program
 134         return 0;
 135 }
 136