typedef int ( *image_scaler )( mlt_frame this, uint8_t **image, mlt_image_format iformat, mlt_image_format oformat, int iwidth, int iheight, int owidth, int oheight );
+static void scale_alpha( mlt_frame this, int iwidth, int iheight, int owidth, int oheight );
+
static int filter_scale( mlt_frame this, uint8_t **image, mlt_image_format iformat, mlt_image_format oformat, int iwidth, int iheight, int owidth, int oheight )
{
// Get the properties
// Return the output
*image = mlt_properties_get_data( properties, "image", NULL );
+
+ // Scale the alpha channel only if exists and not correct size
+ int alpha_size = 0;
+ mlt_properties_get_data( properties, "alpha", &alpha_size );
+ if ( alpha_size > 0 && alpha_size != ( owidth * oheight ) )
+ scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else if ( iformat == mlt_image_rgb24 || iformat == mlt_image_rgb24a )
{
mlt_convert_rgb24a_to_yuv422( *image, iwidth, iheight, iwidth * 4, output, alpha );
mlt_properties_set_data( properties, "alpha", alpha, iwidth * ( iheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
+
+ scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else
{
mlt_convert_rgb24a_to_yuv422( *image, owidth, oheight, owidth * 4, output, alpha );
mlt_properties_set_data( properties, "alpha", alpha, owidth * ( oheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
+
+ scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else
{
static void scale_alpha( mlt_frame this, int iwidth, int iheight, int owidth, int oheight )
{
+ // Scale the alpha
uint8_t *output = NULL;
uint8_t *input = mlt_frame_get_alpha_mask( this );
scaler_method( this, image, *format, mlt_image_yuv422, iwidth, iheight, owidth, oheight );
*width = owidth;
*height = oheight;
-
- // Scale the alpha
- scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else if ( *format == mlt_image_rgb24 && wanted_format == mlt_image_rgb24 )
{
// Return the output
*width = owidth;
*height = oheight;
-
- // Scale the alpha
- scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else if ( *format == mlt_image_rgb24 || *format == mlt_image_rgb24a )
{
*format = mlt_image_yuv422;
*width = owidth;
*height = oheight;
-
- // Scale the alpha
- scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else
{
}
else
{
- // Scale the alpha
- scale_alpha( this, iwidth, iheight, owidth, oheight );
*width = iwidth;
*height = iheight;
}