more affine silliness

[melted] / src / modules / plus / transition_affine.c

diff --git a/src/modules/plus/transition_affine.c b/src/modules/plus/transition_affine.c
index 42c03a2..896fe08 100644 (file)
--- a/src/modules/plus/transition_affine.c
+++ b/src/modules/plus/transition_affine.c
@@ -497,11 +497,16 @@ static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_f
        mlt_position position =  mlt_properties_get_position( a_props, name );
        mlt_position in = mlt_properties_get_position( properties, "in" );
        mlt_position out = mlt_properties_get_position( properties, "out" );
+       int mirror = mlt_properties_get_position( properties, "mirror" );
+       int length = out - in + 1;
 
        // Structures for geometry
        struct geometry_s *start = mlt_properties_get_data( properties, "geometries", NULL );
        struct geometry_s result;
 
+       if ( mirror && position > length / 2 )
+               position = abs( position - length );
+
        // Now parse the geometries
        if ( start == NULL )
        {
@@ -517,7 +522,7 @@ static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_f
        mlt_frame_get_image( a_frame, image, format, width, height, 1 );
 
        // Calculate the region now
-       composite_calculate( &result, this, a_frame, ( float )( position ) / ( out - in + 1 ) );
+       composite_calculate( &result, this, a_frame, ( float )position / length );
 
        // Fetch the b frame image
        result.w = ( int )( result.w * *width / result.nw );
@@ -593,13 +598,13 @@ static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_f
 
                affine_t affine;
                affine_init( affine.matrix );
-               affine_rotate( affine.matrix, fix_rotate_x + rotate_x * ( position - in ) );
-               affine_rotate_y( affine.matrix, fix_rotate_y + rotate_y * ( position - in ) );
-               affine_rotate_z( affine.matrix, fix_rotate_z + rotate_z * ( position - in ) );
+               affine_rotate( affine.matrix, fix_rotate_x + rotate_x * position );
+               affine_rotate_y( affine.matrix, fix_rotate_y + rotate_y * position );
+               affine_rotate_z( affine.matrix, fix_rotate_z + rotate_z * position );
                affine_shear( affine.matrix, 
-                                         fix_shear_x + shear_x * ( position - in ), 
-                                         fix_shear_y + shear_y * ( position - in ),
-                                         fix_shear_z + shear_z * ( position - in ) );
+                                         fix_shear_x + shear_x * position, 
+                                         fix_shear_y + shear_y * position,
+                                         fix_shear_z + shear_z * position );
                affine_offset( affine.matrix, ox, oy );
 
                lower_x -= ( lower_x & 1 );