ref: 777d4f6dbd6865112037111c3ea80b7a4efc52ed
parent: 26a6f3c02bf39024cfcc55e7af889b1da966f152
author: Krzysztof Nikiel <knik@users.sourceforge.net>
date: Mon Aug 14 15:04:49 EDT 2017
a better way to balance band volume
--- a/libfaac/quantize.c
+++ b/libfaac/quantize.c
@@ -82,7 +82,7 @@
target *= 0.45;
}
- bandqual[sfb] = 3.0 * target * quality;
+ bandqual[sfb] = 3.5 * target * quality;
}
}
@@ -134,9 +134,19 @@
coderInfo->scale_factor[sb] = sfac;
for (cnt = start; cnt < end; cnt++)
{+ int x0, x1;
+ double err0, err1;
double tmp = fabs(xr[cnt]) * sfacfix;
tmp = sqrt(tmp * sqrt(tmp));
- xi[cnt] = (int)(tmp + 0.2);
+ x0 = tmp;
+ x1 = x0 + 1;
+ err0 = fabs(tmp * tmp - x0 * x0);
+ err1 = fabs(tmp * tmp - x1 * x1);
+
+ if (err0 < err1)
+ xi[cnt] = x0;
+ else
+ xi[cnt] = x1;
}
}
}