Playlist and blank rearrangement, fix for mlt_consumer and NULL

[melted] / src / framework / mlt_producer.c

diff --git a/src/framework/mlt_producer.c b/src/framework/mlt_producer.c
index 17945f7..9ed89af 100644 (file)
--- a/src/framework/mlt_producer.c
+++ b/src/framework/mlt_producer.c
@@ -162,6 +162,14 @@ int mlt_producer_is_mix( mlt_producer this )
        return tractor != NULL;
 }
 
+/** Determine if the producer is a blank [from a playlist].
+*/
+
+int mlt_producer_is_blank( mlt_producer this )
+{
+       return this == NULL || !strcmp( mlt_properties_get( mlt_producer_properties( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
+}
+
 /** Obtain the parent producer.
 */
 
@@ -187,7 +195,7 @@ mlt_producer mlt_producer_cut( mlt_producer this, int in, int out )
        // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
        if ( in <= 0 )
                in = 0;
-       if ( out >= mlt_producer_get_playtime( parent ) )
+       if ( out >= mlt_producer_get_playtime( parent ) && !mlt_producer_is_blank( this ) )
                out = mlt_producer_get_playtime( parent ) - 1;
 
        mlt_properties_inc_ref( parent_props );
@@ -310,7 +318,7 @@ int mlt_producer_set_in_and_out( mlt_producer this, mlt_position in, mlt_positio
 
        if ( out < 0 )
                out = 0;
-       else if ( out > mlt_producer_get_length( this ) )
+       else if ( out > mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
                out = mlt_producer_get_length( this );
 
        // Swap ins and outs if wrong
@@ -393,9 +401,9 @@ void mlt_producer_prepare_next( mlt_producer this )
 static int producer_get_frame( mlt_service service, mlt_frame_ptr frame, int index )
 {
        int result = 1;
-       mlt_producer this = service->child;
+       mlt_producer this = service != NULL ? service->child : NULL;
 
-       if ( !mlt_producer_is_cut( this ) )
+       if ( this != NULL && !mlt_producer_is_cut( this ) )
        {
                // Get the properties of this producer
                mlt_properties properties = mlt_producer_properties( this );
@@ -443,7 +451,7 @@ static int producer_get_frame( mlt_service service, mlt_frame_ptr frame, int ind
                if ( mlt_properties_get_data( properties, "_producer", NULL ) == NULL )
                        mlt_properties_set_data( properties, "_producer", service, 0, NULL, NULL );
        }
-       else
+       else if ( this != NULL )
        {
                // Get the speed of the cut
                double speed = mlt_producer_get_speed( this );
@@ -491,6 +499,11 @@ static int producer_get_frame( mlt_service service, mlt_frame_ptr frame, int ind
                mlt_properties_set_double( mlt_frame_properties( *frame ), "_speed", speed );
                mlt_producer_prepare_next( this );
        }
+       else
+       {
+               *frame = mlt_frame_init( );
+               result = 0;
+       }
 
        return result;
 }