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avfilter/af_asoftclip: add erf soft clip type

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This commit is contained in:
Paul B Mahol 2020-11-03 12:05:24 +01:00
parent 67d4ab50ec
commit ee686236cd
2 changed files with 13 additions and 0 deletions
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1
doc/filters.texi
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@ -2323,6 +2323,7 @@ It accepts the following values:
@item alg
@item quintic
@item sin
@item erf
@end table
@item param

12
libavfilter/af_asoftclip.c
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@ -32,6 +32,7 @@ enum ASoftClipTypes {
ASC_ALG,
ASC_QUINTIC,
ASC_SIN,
ASC_ERF,
NB_TYPES,
};
@ -57,6 +58,7 @@ static const AVOption asoftclip_options[] = {
{ "alg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=ASC_ALG}, 0, 0, A, "types" },
{ "quintic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=ASC_QUINTIC},0, 0, A, "types" },
{ "sin", NULL, 0, AV_OPT_TYPE_CONST, {.i64=ASC_SIN}, 0, 0, A, "types" },
{ "erf", NULL, 0, AV_OPT_TYPE_CONST, {.i64=ASC_ERF}, 0, 0, A, "types" },
{ "param", "set softclip parameter", OFFSET(param), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.01, 3, A },
{ NULL }
};
@ -148,6 +150,11 @@ static void filter_flt(ASoftClipContext *s,
dst[n] = sinf(src[n]);
}
break;
case ASC_ERF:
for (int n = 0; n < nb_samples; n++) {
dst[n] = erff(src[n]);
}
break;
}
}
}
@ -205,6 +212,11 @@ static void filter_dbl(ASoftClipContext *s,
dst[n] = sin(src[n]);
}
break;
case ASC_ERF:
for (int n = 0; n < nb_samples; n++) {
dst[n] = erf(src[n]);
}
break;
}
}
}