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From ff3674a15e5b1a006546e1edc64c3e778eb34ab1 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Thu, 3 Dec 2015 16:16:28 -0800
Subject: vp8: fix quantizer clamping
the quantizer is transmitted as 7-bits + sign so needs to be clamped in
the delta + absolute case.
BUG=https://bugzilla.mozilla.org/show_bug.cgi?id=1224361
Change-Id: I9115f5d1d5cf7e0a1d149d79486d9d17de9b9639
---
vp8/decoder/decodeframe.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git vp8/decoder/decodeframe.c vp8/decoder/decodeframe.c
index f0d7603..4bc87eb 100644
--- vp8/decoder/decodeframe.c
+++ vp8/decoder/decodeframe.c
@@ -73,10 +73,9 @@ void vp8_mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd)
/* Delta Value */
else
- {
QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
- QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */
- }
+
+ QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */
}
else
QIndex = pc->base_qindex;
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