commit 8e8bc5f28b68527ed6df609899ca82913a9c1729
author Jingning Han <jingning@google.com> Tue Jun 16 14:45:58 2015 -0700
committer Jingning Han <jingning@google.com> Fri Jun 19 09:43:57 2015 -0700
tree 839bcd64ac497de0fa9ea636fc7f78ac237d2df7
parent 001baa5dd8bce66707a123de687a38c4da45cf9a

Add dynamic range comment to vp9_int_pro_col

Change-Id: If14d9f874bd0bf2c5a455982088fd70591f5ea5a

vp9/encoder/vp9_avg.c

diff --git a/vp9/encoder/vp9_avg.c b/vp9/encoder/vp9_avg.c
index 223c923..99bc12e 100644
--- a/vp9/encoder/vp9_avg.c
+++ b/vp9/encoder/vp9_avg.c
@@ -142,9 +142,11 @@
   }
 }
 
+// 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;