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avfilter/firequalizer: add tukey window

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Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
This commit is contained in:
Muhammad Faiz 2016-10-16 05:50:47 +07:00
parent 7c5fca15bb
commit 01ab60201b
1 changed files with 5 additions and 0 deletions
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5
libavfilter/af_firequalizer.c
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@ -39,6 +39,7 @@ enum WindowFunc {
WFUNC_NUTTALL,
WFUNC_BNUTTALL,
WFUNC_BHARRIS,
WFUNC_TUKEY,
NB_WFUNC
};
@ -107,6 +108,7 @@ static const AVOption firequalizer_options[] = {
{ "nuttall", "nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_NUTTALL }, 0, 0, FLAGS, "wfunc" },
{ "bnuttall", "blackman-nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_BNUTTALL }, 0, 0, FLAGS, "wfunc" },
{ "bharris", "blackman-harris window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_BHARRIS }, 0, 0, FLAGS, "wfunc" },
{ "tukey", "tukey window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_TUKEY }, 0, 0, FLAGS, "wfunc" },
{ "fixed", "set fixed frame samples", OFFSET(fixed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ "multi", "set multi channels mode", OFFSET(multi), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ "zero_phase", "set zero phase mode", OFFSET(zero_phase), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
@ -385,6 +387,9 @@ static int generate_kernel(AVFilterContext *ctx, const char *gain, const char *g
case WFUNC_BHARRIS:
win = 0.35875 + 0.48829 * cos(u) + 0.14128 * cos(2*u) + 0.01168 * cos(3*u);
break;
case WFUNC_TUKEY:
win = (u <= 0.5 * M_PI) ? 1.0 : (0.5 + 0.5 * cos(2*u - M_PI));
break;
default:
av_assert0(0);
}