+ Added an option to override alignment and transparent borders for compositing

[melted] / src / framework / mlt_frame.c

diff --git a/src/framework/mlt_frame.c b/src/framework/mlt_frame.c
index 2ee3569..115978d 100644 (file)
--- a/src/framework/mlt_frame.c
+++ b/src/framework/mlt_frame.c
@@ -638,7 +638,7 @@ int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int
        return ret;
 }
 
-uint8_t *mlt_resize_alpha( uint8_t *input, int owidth, int oheight, int iwidth, int iheight )
+uint8_t *mlt_resize_alpha( uint8_t *input, int owidth, int oheight, int iwidth, int iheight, uint8_t alpha_value )
 {
        uint8_t *output = NULL;
 
@@ -650,7 +650,7 @@ uint8_t *mlt_resize_alpha( uint8_t *input, int owidth, int oheight, int iwidth,
                int iused = iwidth;
 
                output = mlt_pool_alloc( owidth * oheight );
-               memset( output, 0, owidth * oheight );
+               memset( output, alpha_value, owidth * oheight );
 
                offset_x -= offset_x % 2;
 
@@ -741,6 +741,8 @@ uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight )
        // If width and height are correct, don't do anything
        if ( iwidth != owidth || iheight != oheight )
        {
+               uint8_t alpha_value = mlt_properties_get_int( properties, "resize_alpha" );
+
                // Create the output image
                uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
 
@@ -753,7 +755,7 @@ uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight )
                mlt_properties_set_int( properties, "height", oheight );
 
                // We should resize the alpha too
-               alpha = mlt_resize_alpha( alpha, owidth, oheight, iwidth, iheight );
+               alpha = mlt_resize_alpha( alpha, owidth, oheight, iwidth, iheight, alpha_value );
                if ( alpha != NULL )
                {
                        mlt_properties_set_data( properties, "alpha", alpha, owidth * oheight, ( mlt_destructor )mlt_pool_release, NULL );