On Fri, Feb 19, 2016 at 3:52 AM, Paul B Mahol <one...@gmail.com> wrote:
>> + center = s->fir_len / 2;
>> +
>> + for (k = 0; k <= center; k++) {
>> + double u = k * (M_PI/center);
>> + double win;
>> + switch (s->wfunc) {
>> + case WFUNC_RECTANGULAR:
>> + win = 1.0;
>> + break;
>> + case WFUNC_HANN:
>> + win = 0.5 + 0.5 * cos(u);
>> + break;
>> + case WFUNC_HAMMING:
>> + win = 0.53836 + 0.46164 * cos(u);
>> + break;
>> + case WFUNC_BLACKMAN:
>> + win = 0.48 + 0.5 * cos(u) + 0.02 * cos(2*u);
>> + break;
>> + case WFUNC_NUTTALL3:
>> + win = 0.40897 + 0.5 * cos(u) + 0.09103 * cos(2*u);
>> + break;
>> + case WFUNC_MNUTTALL3:
>> + win = 0.4243801 + 0.4973406 * cos(u) + 0.0782793 * cos(2*u);
>> + break;
>> + case WFUNC_NUTTALL:
>> + win = 0.355768 + 0.487396 * cos(u) + 0.144232 * cos(2*u) +
>> 0.012604 * cos(3*u);
>> + break;
>> + case WFUNC_BNUTTALL:
>> + win = 0.3635819 + 0.4891775 * cos(u) + 0.1365995 * cos(2*u)
>> + 0.0106411 * cos(3*u);
>> + break;
>> + case WFUNC_BHARRIS:
>> + win = 0.35875 + 0.48829 * cos(u) + 0.14128 * cos(2*u) +
>> 0.01168 * cos(3*u);
>> + break;
>
> What about using libavfilter/window_func.c ?
My version calculate half-length zero centered window. Incompatible
with ff_generate_window_func()
>
> Still LGTM.
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