doc/filters: improve afftfilt documentation

pull/301/head
Paul B Mahol 6 years ago
parent 1f99674ddd
commit 4334e9221e
  1. 8
      doc/filters.texi

@ -1072,14 +1072,14 @@ Apply arbitrary expressions to samples in frequency domain.
@table @option @table @option
@item real @item real
Set frequency domain real expression for each separate channel separated Set frequency domain real expression for each separate channel separated
by '|'. Default is "1". by '|'. Default is "re".
If the number of input channels is greater than the number of If the number of input channels is greater than the number of
expressions, the last specified expression is used for the remaining expressions, the last specified expression is used for the remaining
output channels. output channels.
@item imag @item imag
Set frequency domain imaginary expression for each separate channel Set frequency domain imaginary expression for each separate channel
separated by '|'. If not set, @var{real} option is used. separated by '|'. Default is "im".
Each expression in @var{real} and @var{imag} can contain the following Each expression in @var{real} and @var{imag} can contain the following
constants and functions: constants and functions:
@ -1104,10 +1104,10 @@ number of channels
current frame pts current frame pts
@item re @item re
current real part of frequency bin current real part of frequency bin of current channel
@item im @item im
current imaginary part of frequency bin current imaginary part of frequency bin of current channel
@item real(b, ch) @item real(b, ch)
Return the value of real part of frequency bin at location (@var{bin},@var{channel}) Return the value of real part of frequency bin at location (@var{bin},@var{channel})

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