diff options
Diffstat (limited to 'vp9/encoder/vp9_avg.c')
| -rw-r--r-- | vp9/encoder/vp9_avg.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/vp9/encoder/vp9_avg.c b/vp9/encoder/vp9_avg.c index 437356681..223c923a4 100644 --- a/vp9/encoder/vp9_avg.c +++ b/vp9/encoder/vp9_avg.c @@ -115,12 +115,15 @@ void vp9_hadamard_16x16_c(int16_t const *src_diff, int src_stride, } } +// 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; for (i = 0; i < length; ++i) satd += abs(coeff[i]); + // satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024] return (int16_t)satd; } |