<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><div><br> </div>ÔÚ 2015-06-18 14:21:46£¬"Deepthi Nandakumar" <deepthi@multicorewareinc.com> дµÀ£º<br> <blockquote id="isReplyContent" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jun 17, 2015 at 5:01 AM, Min Chen <span dir="ltr"><<a href="mailto:chenm003@163.com" target="_blank">chenm003@163.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"># HG changeset patch<br>
# User Min Chen <<a href="mailto:chenm003@163.com" target="_blank">chenm003@163.com</a>><br>
# Date 1434496332 25200<br>
# Node ID deee2eae898d7ea835a50482aaacac8205fc9fa3<br>
# Parent 6cc50a833797c6fac594710996bbf6e88f0adc93<br>
reduce shift operator on coeff remain code<br>
---<br>
source/encoder/entropy.cpp | 7 +++++--<br>
1 files changed, 5 insertions(+), 2 deletions(-)<br>
<br>
diff -r 6cc50a833797 -r deee2eae898d source/encoder/entropy.cpp<br>
--- a/source/encoder/entropy.cpp Tue Jun 16 15:54:22 2015 -0700<br>
+++ b/source/encoder/entropy.cpp Tue Jun 16 16:12:12 2015 -0700<br>
@@ -1809,6 +1809,7 @@<br>
// Standard path<br>
uint32_t goRiceParam = 0;<br>
int baseLevel = 3;<br>
+ uint32_t threshold = COEF_REMAIN_BIN_REDUCTION;<br>
#if CHECKED_BUILD || _DEBUG<br>
int firstCoeff2 = 1;<br>
#endif<br>
@@ -1823,8 +1824,10 @@<br>
if (absCoeff[idx] >= baseLevel)<br>
{<br>
writeCoefRemainExGolomb(absCoeff[idx] - baseLevel, goRiceParam);<br>
- if (absCoeff[idx] > (COEF_REMAIN_BIN_REDUCTION << goRiceParam))<br>
- goRiceParam = (goRiceParam + 1) - (goRiceParam >> 2);<br>
+ X265_CHECK(threshold == (uint32_t)(COEF_REMAIN_BIN_REDUCTION << goRiceParam), "COEF_REMAIN_BIN_REDUCTION check failure\n");<br>
+ const int adjust = (absCoeff[idx] > threshold) & (goRiceParam <= 3);<br></blockquote><div><br></div><div>goRiceParam is always zero until this point?</div><div> </div><div>no, it in loop, so unprediction value<br><br></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">
+ goRiceParam += adjust;<br>
+ threshold += (adjust) ? threshold : 0;<br>
X265_CHECK(goRiceParam <= 4, "goRiceParam check failure\n");<br>
}<br>
#if CHECKED_BUILD || _DEBUG<br>
<br>
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</blockquote></div><br></div></div>
</blockquote></div>