From: Jingning Han <jingning@google.com>
Date: Tue, 16 Jun 2015 21:45:58 +0000 (-0700)
Subject: Add dynamic range comment to vp9_int_pro_col
X-Git-Tag: v1.5.0~542^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8e8bc5f28b68527ed6df609899ca82913a9c1729;p=libvpx

Add dynamic range comment to vp9_int_pro_col

Change-Id: If14d9f874bd0bf2c5a455982088fd70591f5ea5a
---

diff --git a/vp9/encoder/vp9_avg.c b/vp9/encoder/vp9_avg.c
index 223c923a4..99bc12e81 100644
--- a/vp9/encoder/vp9_avg.c
+++ b/vp9/encoder/vp9_avg.c
@@ -142,9 +142,11 @@ void vp9_int_pro_row_c(int16_t *hbuf, uint8_t const *ref,
   }
 }
 
+// width: value range {16, 32, 64}.
 int16_t vp9_int_pro_col_c(uint8_t const *ref, const int width) {
   int idx;
   int16_t sum = 0;
+  // sum: 14 bit, dynamic range [0, 16320]
   for (idx = 0; idx < width; ++idx)
     sum += ref[idx];
   return sum;