shithub: libvpx

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Add dynamic range comment to vp9_satd

Change-Id: I75873846e6fdafbe7597a1bd0192115d2d1e9987

--- a/vp9/encoder/vp9_avg.c

+++ b/vp9/encoder/vp9_avg.c

@@ -115,6 +115,8 @@

   }

 }

+// coeff: 16 bits, dynamic range [-32640, 32640].

+// length: value range {16, 64, 256, 1024}.

 int16_t vp9_satd_c(const int16_t *coeff, int length) {

   int i;

   int satd = 0;

@@ -121,6 +123,7 @@

   for (i = 0; i < length; ++i)

     satd += abs(coeff[i]);

+  // satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024]

   return (int16_t)satd;

 }