* qatar/master:
snow: split snow in snowdec and snowenc
tiffenc: deprecate using compression_level
swscale: fix failing fate tests.
swscale: add support for planar RGB input.
h264: add support for decoding planar RGB images.
Clean up swscale pixfmt macros using av_pix_fmt_descriptors[].
pixfmt: add planar RGB formats.