diff options
Diffstat (limited to 'vpx_dsp/avg.c')
| -rw-r--r-- | vpx_dsp/avg.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/vpx_dsp/avg.c b/vpx_dsp/avg.c index 391e9eb14..a8dcab7da 100644 --- a/vpx_dsp/avg.c +++ b/vpx_dsp/avg.c @@ -295,19 +295,19 @@ void vpx_hadamard_32x32_c(const int16_t *src_diff, ptrdiff_t src_stride, vpx_hadamard_16x16_c(src_ptr, src_stride, coeff + idx * 256); } - // coeff: 15 bit, dynamic range [-16320, 16320] + // coeff: 16 bit, dynamic range [-32768, 32767] for (idx = 0; idx < 256; ++idx) { tran_low_t a0 = coeff[0]; tran_low_t a1 = coeff[256]; tran_low_t a2 = coeff[512]; tran_low_t a3 = coeff[768]; - tran_low_t b0 = (a0 + a1) >> 2; // (a0 + a1): 16 bit, [-32640, 32640] + tran_low_t b0 = (a0 + a1) >> 2; // (a0 + a1): 17 bit, [-65536, 65535] tran_low_t b1 = (a0 - a1) >> 2; // b0-b3: 15 bit, dynamic range - tran_low_t b2 = (a2 + a3) >> 2; // [-16320, 16320] + tran_low_t b2 = (a2 + a3) >> 2; // [-16384, 16383] tran_low_t b3 = (a2 - a3) >> 2; - coeff[0] = b0 + b2; // 16 bit, [-32640, 32640] + coeff[0] = b0 + b2; // 16 bit, [-32768, 32767] coeff[256] = b1 + b3; coeff[512] = b0 - b2; coeff[768] = b1 - b3; |