Constness changes

[melted] / mlt++ / CUSTOMISING

diff --git a/mlt++/CUSTOMISING b/mlt++/CUSTOMISING
index 1fc4f2c..7fdce7f 100644 (file)
--- a/mlt++/CUSTOMISING
+++ b/mlt++/CUSTOMISING
@@ -320,7 +320,33 @@ OTHER MANIPULATIONS
        manipulated in the push method - for example, to remove a track from the 
        output, we could do something like:
 
-       TBD
+               Response *push( char *command, Service *service )
+               {
+                       Playlist playlist( ( mlt_playlist )( unit( 0 )->get_data( "playlist" ) ) );
+                       Tractor *tractor( *service );
+                       if ( tractor.is_valid( ) && playlist.is_valid( ) )
+                       {
+                               // Remove track 2 (NB: tracks are indexed from 0 like everything else)
+                               Producer *producer = tractor.track( 2 );
+                               Playlist track( producer );
+
+                               // If we have a valid track then hide video and audio
+                               // This is a bit pattern - 1 is video, 2 is audio
+                               if ( track.is_valid( ) )
+                                       track.set( "hide", 3 );
+
+                               // You need to delete the reference to the playlist producer here
+                               delete producer;
+
+                               // Play it
+                               playlist.lock( );
+                               playlist.clear( );
+                               playlist.append( producer );
+                               playlist.unlock( );
+                               return new Response( 200, "OK" );
+                       }
+                       return new Response( 400, "Invalid" );
+               }
 
 
 EVENT HANDLING
@@ -330,7 +356,7 @@ EVENT HANDLING
        on 'consumer-frame-render' - this event is fired immediately before a frame
        is rendered.
 
-       TBD
+       See example in test/server.cpp
 
 
 DISABLING DVCP