- dev = int_sqrt(((sse / i) * F * F) + (((sse % i) * F * F) + i / 2) / i);
- if (sse)
- psnr = ((2 * log16(max << 16) + log16(i) - log16(sse)) *
- 284619LL * F + (1LL << 31)) / (1LL << 32);
- else
- psnr = 1000 * F - 1; // floating point free infinity :)
-
- printf("stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5d bytes:%9d/%9d\n",
- (int)(dev / F), (int)(dev % F),
- (int)(psnr / F), (int)(psnr % F),
- maxdist, size0, size1);
+ switch (len) {
+ case 1:
+ case 2: {
+ uint64_t psnr;
+ uint64_t dev = int_sqrt(((sse / i) * F * F) + (((sse % i) * F * F) + i / 2) / i);
+ if (sse)
+ psnr = ((2 * log16(max << 16) + log16(i) - log16(sse)) *
+ 284619LL * F + (1LL << 31)) / (1LL << 32);
+ else
+ psnr = 1000 * F - 1; // floating point free infinity :)
+
+ printf("stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5"PRIu64" bytes:%9"PRIu64"/%9"PRIu64"\n",
+ (int)(dev / F), (int)(dev % F),
+ (int)(psnr / F), (int)(psnr % F),
+ maxdist, size0, size1);
+ break;
+ }
+ case 4:
+ case 8: {
+ char psnr_str[64];
+ double dev = sqrt(sse_d / i);
+ uint64_t scale = (len == 4) ? (1ULL << 24) : (1ULL << 32);
+
+ if (sse_d) {
+ double psnr = 2 * log(DBL_MAX) - log(i / sse_d);
+ snprintf(psnr_str, sizeof(psnr_str), "%5.02f", psnr);
+ } else
+ snprintf(psnr_str, sizeof(psnr_str), "inf");
+
+ maxdist = maxdist_d * scale;
+
+ printf("stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64" bytes:%9"PRIu64"/%9"PRIu64"\n",
+ dev * scale, psnr_str, maxdist, size0, size1);
+ break;
+ }
+ }