On Fri, Feb 19, 2016 at 11:52 PM, Muhammad Faiz <mfc...@gmail.com> wrote:
> 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.
Pushed
Thank's
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