Add dynamic range comment to vp9_int_pro_col

Change-Id: If14d9f874bd0bf2c5a455982088fd70591f5ea5a
2015-06-16 14:45:58 -07:00 · 2015-06-16 14:45:58 -07:00 · 8e8bc5f28b
commit 8e8bc5f28b
parent 001baa5dd8
1 changed files with 2 additions and 0 deletions
--- 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;