Original commit message from CVS:
Patch by: René Stadler <mail at renestadler dot de>
* gst/replaygain/rganalysis.c: (yule_filter):
Avoid slowdown from denormals when processing near-silence input data.
Spotted by Gabriel Bouvigne. Fixes #494499.
yule_filter (const gfloat * input, gfloat * output,
const gfloat * a, const gfloat * b)
{
- output[0] = input[0] * b[0]
+ /* 1e-10 is added below to avoid running into denormals when operating on
+ * near silence. */
+
+ output[0] = 1e-10 + input[0] * b[0]
+ input[-1] * b[1] - output[-1] * a[1]
+ input[-2] * b[2] - output[-2] * a[2]
+ input[-3] * b[3] - output[-3] * a[3]