transition_luma.c: bugfix (kdenlive-496) floating point exception when a slideshow...

git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@1290 d19143bc-622f-0410-bfdd-b5b2a6649095

diff --git a/src/modules/core/transition_luma.c b/src/modules/core/transition_luma.c
index 258eefad0d587da9fe8fbf3b5ceda20ed4ddfd42..f08d84f76bfc8c1050f236389107081b323c3fad 100644 (file)
--- a/src/modules/core/transition_luma.c
+++ b/src/modules/core/transition_luma.c
@@ -146,6 +146,9 @@ static void luma_composite( mlt_frame a_frame, mlt_frame b_frame, int luma_width
        mlt_frame_get_image( a_frame, &p_dest, &format_dest, &width_dest, &height_dest, 1 );
        mlt_frame_get_image( b_frame, &p_src, &format_src, &width_src, &height_src, 0 );
 
+       if ( *width == 0 || *height == 0 )
+               return;
+
        // Pick the lesser of two evils ;-)
        width_src = width_src > width_dest ? width_dest : width_src;
        height_src = height_src > height_dest ? height_dest : height_src;
@@ -527,7 +530,6 @@ static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_f
        if ( mlt_properties_get( properties, "fixed" ) )
                mix = mlt_properties_get_double( properties, "fixed" );
 
-
        if ( luma_width > 0 && luma_height > 0 && luma_bitmap != NULL )
                // Composite the frames using a luma map
                luma_composite( !invert ? a_frame : b_frame, !invert ? b_frame : a_frame, luma_width, luma_height, luma_bitmap, mix, frame_delta,
@@ -536,7 +538,6 @@ static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_f
                // Dissolve the frames using the time offset for mix value
                dissolve_yuv( a_frame, b_frame, mix, *width, *height );
 
-
        // Extract the a_frame image info
        *width = mlt_properties_get_int( !invert ? a_props : b_props, "width" );
        *height = mlt_properties_get_int( !invert ? a_props : b_props, "height" );