[x264-devel] Disable i8x8 in lossless

[Fiona Glaser]

x264 | branch: master | Fiona Glaser <fiona at x264.com> | Sat Jul 19 20:34:22 2014 -0700| [af8e768e2bd3b4398bca033998f83b0eb8874914] | committer: Fiona Glaser

Disable i8x8 in lossless

x264's implementation was slightly incorrect due to a vague spec, so some
decoders decoded video incorrectly.

Minimal impact on compression.

> http://git.videolan.org/gitweb.cgi/x264.git/?a=commit;h=af8e768e2bd3b4398bca033998f83b0eb8874914
---

 encoder/encoder.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/encoder/encoder.c b/encoder/encoder.c
index 416bf0c..bd26a9f 100644
--- a/encoder/encoder.c
+++ b/encoder/encoder.c
@@ -818,6 +818,8 @@ static int x264_validate_parameters( x264_t *h, int b_open )
         /* 8x8dct is not useful without RD in CAVLC lossless */
         if( !h->param.b_cabac && h->param.analyse.i_subpel_refine < 6 )
             h->param.analyse.b_transform_8x8 = 0;
+        h->param.analyse.inter &= ~X264_ANALYSE_I8x8;
+        h->param.analyse.intra &= ~X264_ANALYSE_I8x8;
     }
     if( h->param.rc.i_rc_method == X264_RC_CQP )
     {