ff_exp10(0.05 *
(avpriv_scalarproduct_float_c(pred_table, prediction_error, 4) +
energy_mean)) /
- sqrtf(fixed_mean_energy);
+ sqrtf(fixed_mean_energy ? fixed_mean_energy : 1.0);
// update quantified prediction error energy history
memmove(&prediction_error[0], &prediction_error[1],