Fixes Ticket3170
fba8946 swscale: support internal scaler cascades
libswscale/swscale.c | 13 ++++++++++
libswscale/swscale_internal.h | 10 ++++++++
libswscale/utils.c | 54 ++++++++++++++++++++++++++++++++---------
libswscale/version.h | 2 +-
4 files changed, 67 insertions(+), 12 deletions(-)