From 374a17366e8bbac63c28db270781057273838c20 Mon Sep 17 00:00:00 2001
From: Yaowu Xu <yaowu@google.com>
Date: Thu, 14 Mar 2013 12:31:27 -0700
Subject: [PATCH] force lossless coding at very high quality end
Change-Id: I75fc4eee10bee9efd419d248827290cce8e6d637
---
vp9/encoder/vp9_encodeframe.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/vp9/encoder/vp9_encodeframe.c b/vp9/encoder/vp9_encodeframe.c
index 650e39bef0..b7b270031f 100644
--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -1292,7 +1292,9 @@ static void encode_frame_internal(VP9_COMP *cpi) {
vp9_zero(cpi->mb_mv_ref_count);
#endif
- // force lossless mode when Q0 is selected
+ // force lossless mode
+ if (cm->base_qindex <= 4)
+ cm->base_qindex = 0;
cpi->mb.e_mbd.lossless = (cm->base_qindex == 0 &&
cm->y1dc_delta_q == 0 &&
cm->uvdc_delta_q == 0 &&
--
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