Port biquads filters from SoX
Adds allpass, bass, bandpass, bandreject, biquad, equalizer, highpass, lowpass and treble filter. Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
ff23b76899
commit
b70ea49ca3
@ -10,6 +10,8 @@ version <next>:
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- EVRC decoder
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- EVRC decoder
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- audio fade filter
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- audio fade filter
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- filtering audio with unknown channel layout
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- filtering audio with unknown channel layout
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- allpass, bass, bandpass, bandreject, biquad, equalizer, highpass, lowpass
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and treble audio filter
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version 1.1:
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version 1.1:
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268
doc/filters.texi
268
doc/filters.texi
@ -282,6 +282,274 @@ aconvert=u8:auto
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@end example
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@end example
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@end itemize
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@end itemize
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@section allpass
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Apply a two-pole all-pass filter with central frequency (in Hz)
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@var{frequency}, and filter-width @var{width}.
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An all-pass filter changes the audio's frequency to phase relationship
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without changing its frequency to amplitude relationship.
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item frequency, f
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Set frequency in Hz.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Specify the band-width of a filter in width_type units.
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@end table
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@section highpass
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Apply a high-pass filter with 3dB point frequency.
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The filter can be either single-pole, or double-pole (the default).
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The filter roll off at 6dB per pole per octave (20dB per pole per decade).
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item frequency, f
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Set frequency in Hz. Default is 3000.
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@item poles, p
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Set number of poles. Default is 2.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Specify the band-width of a filter in width_type units.
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Applies only to double-pole filter.
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The default is 0.707q and gives a Butterworth response.
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@end table
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@section lowpass
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Apply a low-pass filter with 3dB point frequency.
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The filter can be either single-pole or double-pole (the default).
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The filter roll off at 6dB per pole per octave (20dB per pole per decade).
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item frequency, f
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Set frequency in Hz. Default is 500.
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@item poles, p
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Set number of poles. Default is 2.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Specify the band-width of a filter in width_type units.
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Applies only to double-pole filter.
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The default is 0.707q and gives a Butterworth response.
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@end table
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@section bass
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Boost or cut the bass (lower) frequencies of the audio using a two-pole
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shelving filter with a response similar to that of a standard
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hi-fi's tone-controls. This is also known as shelving equalisation (EQ).
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item gain, g
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Give the gain at 0 Hz. Its useful range is about -20
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(for a large cut) to +20 (for a large boost).
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Beware of clipping when using a positive gain.
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@item frequency, f
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Set the filter's central frequency and so can be used
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to extend or reduce the frequency range to be boosted or cut.
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The default value is @code{100} Hz.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Determine how steep is the filter's shelf transition.
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@end table
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@section treble
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Boost or cut treble (upper) frequencies of the audio using a two-pole
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shelving filter with a response similar to that of a standard
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hi-fi's tone-controls. This is also known as shelving equalisation (EQ).
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item gain, g
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Give the gain at whichever is the lower of ~22 kHz and the
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Nyquist frequency. Its useful range is about -20 (for a large cut)
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to +20 (for a large boost). Beware of clipping when using a positive gain.
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@item frequency, f
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Set the filter's central frequency and so can be used
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to extend or reduce the frequency range to be boosted or cut.
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The default value is @code{3000} Hz.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Determine how steep is the filter's shelf transition.
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@end table
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@section bandpass
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Apply a two-pole Butterworth band-pass filter with central
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frequency @var{frequency}, and (3dB-point) band-width width.
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The @var{csg} option selects a constant skirt gain (peak gain = Q)
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instead of the default: constant 0dB peak gain.
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The filter roll off at 6dB per octave (20dB per decade).
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item frequency, f
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Set the filter's central frequency. Default is @code{3000}.
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@item csg
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Constant skirt gain if set to 1. Defaults to 0.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Specify the band-width of a filter in width_type units.
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@end table
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@section bandreject
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Apply a two-pole Butterworth band-reject filter with central
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frequency @var{frequency}, and (3dB-point) band-width @var{width}.
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The filter roll off at 6dB per octave (20dB per decade).
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item frequency, f
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Set the filter's central frequency. Default is @code{3000}.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Specify the band-width of a filter in width_type units.
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@end table
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@section biquad
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Apply a biquad IIR filter with the given coefficients.
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Where @var{b0}, @var{b1}, @var{b2} and @var{a0}, @var{a1}, @var{a2}
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are the numerator and denominator coefficients respectively.
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@section equalizer
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Apply a two-pole peaking equalisation (EQ) filter. With this
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filter, the signal-level at and around a selected frequency can
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be increased or decreased, whilst (unlike bandpass and bandreject
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filters) that at all other frequencies is unchanged.
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In order to produce complex equalisation curves, this filter can
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be given several times, each with a different central frequency.
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The filter accepts parameters as a list of @var{key}=@var{value}
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pairs, separated by ":".
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A description of the accepted parameters follows.
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@table @option
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@item frequency, f
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Set the filter's central frequency in Hz.
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@item width_type
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Set method to specify band-width of filter.
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@table @option
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@item @var{h} (Hz)
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@item @var{q} (Q-Factor)
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@item @var{o} (octave)
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@item @var{s} (slope)
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@end table
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@item width, w
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Specify the band-width of a filter in width_type units.
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@item gain, g
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Set the required gain or attenuation in dB.
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Beware of clipping when using a positive gain.
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@end table
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@section afade
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@section afade
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Apply fade-in/out effect to input audio.
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Apply fade-in/out effect to input audio.
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@ -53,6 +53,7 @@ OBJS-$(CONFIG_SWSCALE) += lswsutils.o
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OBJS-$(CONFIG_ACONVERT_FILTER) += af_aconvert.o
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OBJS-$(CONFIG_ACONVERT_FILTER) += af_aconvert.o
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OBJS-$(CONFIG_AFADE_FILTER) += af_afade.o
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OBJS-$(CONFIG_AFADE_FILTER) += af_afade.o
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OBJS-$(CONFIG_AFORMAT_FILTER) += af_aformat.o
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OBJS-$(CONFIG_AFORMAT_FILTER) += af_aformat.o
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OBJS-$(CONFIG_ALLPASS_FILTER) += af_biquads.o
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OBJS-$(CONFIG_AMERGE_FILTER) += af_amerge.o
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OBJS-$(CONFIG_AMERGE_FILTER) += af_amerge.o
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OBJS-$(CONFIG_AMIX_FILTER) += af_amix.o
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OBJS-$(CONFIG_AMIX_FILTER) += af_amix.o
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OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o
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OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o
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@ -68,14 +69,22 @@ OBJS-$(CONFIG_ASPLIT_FILTER) += split.o
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OBJS-$(CONFIG_ASTREAMSYNC_FILTER) += af_astreamsync.o
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OBJS-$(CONFIG_ASTREAMSYNC_FILTER) += af_astreamsync.o
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OBJS-$(CONFIG_ASYNCTS_FILTER) += af_asyncts.o
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OBJS-$(CONFIG_ASYNCTS_FILTER) += af_asyncts.o
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OBJS-$(CONFIG_ATEMPO_FILTER) += af_atempo.o
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OBJS-$(CONFIG_ATEMPO_FILTER) += af_atempo.o
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OBJS-$(CONFIG_BANDPASS_FILTER) += af_biquads.o
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OBJS-$(CONFIG_BANDREJECT_FILTER) += af_biquads.o
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OBJS-$(CONFIG_BASS_FILTER) += af_biquads.o
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OBJS-$(CONFIG_BIQUAD_FILTER) += af_biquads.o
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OBJS-$(CONFIG_CHANNELMAP_FILTER) += af_channelmap.o
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OBJS-$(CONFIG_CHANNELMAP_FILTER) += af_channelmap.o
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OBJS-$(CONFIG_CHANNELSPLIT_FILTER) += af_channelsplit.o
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OBJS-$(CONFIG_CHANNELSPLIT_FILTER) += af_channelsplit.o
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OBJS-$(CONFIG_EARWAX_FILTER) += af_earwax.o
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OBJS-$(CONFIG_EARWAX_FILTER) += af_earwax.o
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OBJS-$(CONFIG_EBUR128_FILTER) += f_ebur128.o
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OBJS-$(CONFIG_EBUR128_FILTER) += f_ebur128.o
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OBJS-$(CONFIG_EQUALIZER_FILTER) += af_biquads.o
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OBJS-$(CONFIG_HIGHPASS_FILTER) += af_biquads.o
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OBJS-$(CONFIG_JOIN_FILTER) += af_join.o
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OBJS-$(CONFIG_JOIN_FILTER) += af_join.o
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OBJS-$(CONFIG_LOWPASS_FILTER) += af_biquads.o
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OBJS-$(CONFIG_PAN_FILTER) += af_pan.o
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OBJS-$(CONFIG_PAN_FILTER) += af_pan.o
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OBJS-$(CONFIG_RESAMPLE_FILTER) += af_resample.o
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OBJS-$(CONFIG_RESAMPLE_FILTER) += af_resample.o
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OBJS-$(CONFIG_SILENCEDETECT_FILTER) += af_silencedetect.o
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OBJS-$(CONFIG_SILENCEDETECT_FILTER) += af_silencedetect.o
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OBJS-$(CONFIG_TREBLE_FILTER) += af_biquads.o
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OBJS-$(CONFIG_VOLUME_FILTER) += af_volume.o
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OBJS-$(CONFIG_VOLUME_FILTER) += af_volume.o
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OBJS-$(CONFIG_VOLUMEDETECT_FILTER) += af_volumedetect.o
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OBJS-$(CONFIG_VOLUMEDETECT_FILTER) += af_volumedetect.o
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599
libavfilter/af_biquads.c
Normal file
599
libavfilter/af_biquads.c
Normal file
@ -0,0 +1,599 @@
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/*
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* Copyright (c) 2013 Paul B Mahol
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* Copyright (c) 2006-2008 Rob Sykes <robs@users.sourceforge.net>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* 2-pole filters designed by Robert Bristow-Johnson <rbj@audioimagination.com>
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* see http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt
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*
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* 1-pole filters based on code (c) 2000 Chris Bagwell <cbagwell@sprynet.com>
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* Algorithms: Recursive single pole low/high pass filter
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* Reference: The Scientist and Engineer's Guide to Digital Signal Processing
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*
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* low-pass: output[N] = input[N] * A + output[N-1] * B
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* X = exp(-2.0 * pi * Fc)
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* A = 1 - X
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* B = X
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* Fc = cutoff freq / sample rate
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*
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* Mimics an RC low-pass filter:
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*
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* ---/\/\/\/\----------->
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* |
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* --- C
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* ---
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* |
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||||||
|
* |
|
||||||
|
* V
|
||||||
|
*
|
||||||
|
* high-pass: output[N] = A0 * input[N] + A1 * input[N-1] + B1 * output[N-1]
|
||||||
|
* X = exp(-2.0 * pi * Fc)
|
||||||
|
* A0 = (1 + X) / 2
|
||||||
|
* A1 = -(1 + X) / 2
|
||||||
|
* B1 = X
|
||||||
|
* Fc = cutoff freq / sample rate
|
||||||
|
*
|
||||||
|
* Mimics an RC high-pass filter:
|
||||||
|
*
|
||||||
|
* || C
|
||||||
|
* ----||--------->
|
||||||
|
* || |
|
||||||
|
* <
|
||||||
|
* > R
|
||||||
|
* <
|
||||||
|
* |
|
||||||
|
* V
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "libavutil/opt.h"
|
||||||
|
#include "libavutil/avassert.h"
|
||||||
|
#include "audio.h"
|
||||||
|
#include "avfilter.h"
|
||||||
|
#include "internal.h"
|
||||||
|
|
||||||
|
enum FilterType {
|
||||||
|
biquad,
|
||||||
|
equalizer,
|
||||||
|
bass,
|
||||||
|
treble,
|
||||||
|
band,
|
||||||
|
bandpass,
|
||||||
|
bandreject,
|
||||||
|
allpass,
|
||||||
|
highpass,
|
||||||
|
lowpass,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum WidthType {
|
||||||
|
NONE,
|
||||||
|
HZ,
|
||||||
|
OCTAVE,
|
||||||
|
QFACTOR,
|
||||||
|
SLOPE,
|
||||||
|
};
|
||||||
|
|
||||||
|
typedef struct ChanCache {
|
||||||
|
double i1, i2;
|
||||||
|
double o1, o2;
|
||||||
|
} ChanCache;
|
||||||
|
|
||||||
|
typedef struct {
|
||||||
|
const AVClass *class;
|
||||||
|
|
||||||
|
enum FilterType filter_type;
|
||||||
|
enum WidthType width_type;
|
||||||
|
int poles;
|
||||||
|
int csg;
|
||||||
|
|
||||||
|
double gain;
|
||||||
|
double frequency;
|
||||||
|
double width;
|
||||||
|
|
||||||
|
double a0, a1, a2;
|
||||||
|
double b0, b1, b2;
|
||||||
|
|
||||||
|
ChanCache *cache;
|
||||||
|
|
||||||
|
void (*filter)(const void *ibuf, void *obuf, int len,
|
||||||
|
double *i1, double *i2, double *o1, double *o2,
|
||||||
|
double b0, double b1, double b2, double a1, double a2);
|
||||||
|
} BiquadsContext;
|
||||||
|
|
||||||
|
static av_cold int init(AVFilterContext *ctx, const char *args)
|
||||||
|
{
|
||||||
|
BiquadsContext *p = ctx->priv;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
av_opt_set_defaults(p);
|
||||||
|
|
||||||
|
if ((ret = av_set_options_string(p, args, "=", ":")) < 0)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
if (p->filter_type != biquad) {
|
||||||
|
if (p->frequency <= 0 || p->width <= 0) {
|
||||||
|
av_log(ctx, AV_LOG_ERROR, "Invalid frequency %f and/or width %f <= 0\n",
|
||||||
|
p->frequency, p->width);
|
||||||
|
return AVERROR(EINVAL);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int query_formats(AVFilterContext *ctx)
|
||||||
|
{
|
||||||
|
AVFilterFormats *formats;
|
||||||
|
AVFilterChannelLayouts *layouts;
|
||||||
|
static const enum AVSampleFormat sample_fmts[] = {
|
||||||
|
AV_SAMPLE_FMT_S16P,
|
||||||
|
AV_SAMPLE_FMT_S32P,
|
||||||
|
AV_SAMPLE_FMT_FLTP,
|
||||||
|
AV_SAMPLE_FMT_DBLP,
|
||||||
|
AV_SAMPLE_FMT_NONE
|
||||||
|
};
|
||||||
|
|
||||||
|
layouts = ff_all_channel_layouts();
|
||||||
|
if (!layouts)
|
||||||
|
return AVERROR(ENOMEM);
|
||||||
|
ff_set_common_channel_layouts(ctx, layouts);
|
||||||
|
|
||||||
|
formats = ff_make_format_list(sample_fmts);
|
||||||
|
if (!formats)
|
||||||
|
return AVERROR(ENOMEM);
|
||||||
|
ff_set_common_formats(ctx, formats);
|
||||||
|
|
||||||
|
formats = ff_all_samplerates();
|
||||||
|
if (!formats)
|
||||||
|
return AVERROR(ENOMEM);
|
||||||
|
ff_set_common_samplerates(ctx, formats);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define BIQUAD_FILTER(name, type, min, max) \
|
||||||
|
static void biquad_## name (const void *input, void *output, int len, \
|
||||||
|
double *in1, double *in2, \
|
||||||
|
double *out1, double *out2, \
|
||||||
|
double b0, double b1, double b2, \
|
||||||
|
double a1, double a2) \
|
||||||
|
{ \
|
||||||
|
const type *ibuf = input; \
|
||||||
|
type *obuf = output; \
|
||||||
|
double i1 = *in1; \
|
||||||
|
double i2 = *in2; \
|
||||||
|
double o1 = *out1; \
|
||||||
|
double o2 = *out2; \
|
||||||
|
int i; \
|
||||||
|
\
|
||||||
|
for (i = 0; i < len; i++) { \
|
||||||
|
double o0 = ibuf[i] * b0 + i1 * b1 + i2 * b2 - o1 * a1 - o2 * a2; \
|
||||||
|
i2 = i1; \
|
||||||
|
i1 = ibuf[i]; \
|
||||||
|
o2 = o1; \
|
||||||
|
o1 = o0; \
|
||||||
|
if (o0 < min) { \
|
||||||
|
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
|
||||||
|
obuf[i] = min; \
|
||||||
|
} else if (o0 > max) { \
|
||||||
|
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
|
||||||
|
obuf[i] = max; \
|
||||||
|
} else { \
|
||||||
|
obuf[i] = o0; \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
*in1 = i1; \
|
||||||
|
*in2 = i2; \
|
||||||
|
*out1 = o1; \
|
||||||
|
*out2 = o2; \
|
||||||
|
}
|
||||||
|
|
||||||
|
BIQUAD_FILTER(s16, int16_t, INT16_MIN, INT16_MAX)
|
||||||
|
BIQUAD_FILTER(s32, int32_t, INT32_MIN, INT32_MAX)
|
||||||
|
BIQUAD_FILTER(flt, float, -1., 1.)
|
||||||
|
BIQUAD_FILTER(dbl, double, -1., 1.)
|
||||||
|
|
||||||
|
static int config_output(AVFilterLink *outlink)
|
||||||
|
{
|
||||||
|
AVFilterContext *ctx = outlink->src;
|
||||||
|
BiquadsContext *p = ctx->priv;
|
||||||
|
AVFilterLink *inlink = ctx->inputs[0];
|
||||||
|
double A = exp(p->gain / 40 * log(10.));
|
||||||
|
double w0 = 2 * M_PI * p->frequency / inlink->sample_rate;
|
||||||
|
double alpha;
|
||||||
|
|
||||||
|
if (w0 > M_PI) {
|
||||||
|
av_log(ctx, AV_LOG_ERROR,
|
||||||
|
"Invalid frequency %f. Frequency must be less than half the sample-rate %d.\n",
|
||||||
|
p->frequency, inlink->sample_rate);
|
||||||
|
return AVERROR(EINVAL);
|
||||||
|
}
|
||||||
|
|
||||||
|
switch (p->width_type) {
|
||||||
|
case NONE:
|
||||||
|
alpha = 0.0;
|
||||||
|
break;
|
||||||
|
case HZ:
|
||||||
|
alpha = sin(w0) / (2 * p->frequency / p->width);
|
||||||
|
break;
|
||||||
|
case OCTAVE:
|
||||||
|
alpha = sin(w0) * sinh(log(2.) / 2 * p->width * w0 / sin(w0));
|
||||||
|
break;
|
||||||
|
case QFACTOR:
|
||||||
|
alpha = sin(w0) / (2 * p->width);
|
||||||
|
break;
|
||||||
|
case SLOPE:
|
||||||
|
alpha = sin(w0) / 2 * sqrt((A + 1 / A) * (1 / p->width - 1) + 2);
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
av_assert0(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
switch (p->filter_type) {
|
||||||
|
case biquad:
|
||||||
|
break;
|
||||||
|
case equalizer:
|
||||||
|
p->a0 = 1 + alpha / A;
|
||||||
|
p->a1 = -2 * cos(w0);
|
||||||
|
p->a2 = 1 - alpha / A;
|
||||||
|
p->b0 = 1 + alpha * A;
|
||||||
|
p->b1 = -2 * cos(w0);
|
||||||
|
p->b2 = 1 - alpha * A;
|
||||||
|
break;
|
||||||
|
case bass:
|
||||||
|
p->a0 = (A + 1) + (A - 1) * cos(w0) + 2 * sqrt(A) * alpha;
|
||||||
|
p->a1 = -2 * ((A - 1) + (A + 1) * cos(w0));
|
||||||
|
p->a2 = (A + 1) + (A - 1) * cos(w0) - 2 * sqrt(A) * alpha;
|
||||||
|
p->b0 = A * ((A + 1) - (A - 1) * cos(w0) + 2 * sqrt(A) * alpha);
|
||||||
|
p->b1 = 2 * A * ((A - 1) - (A + 1) * cos(w0));
|
||||||
|
p->b2 = A * ((A + 1) - (A - 1) * cos(w0) - 2 * sqrt(A) * alpha);
|
||||||
|
break;
|
||||||
|
case treble:
|
||||||
|
p->a0 = (A + 1) - (A - 1) * cos(w0) + 2 * sqrt(A) * alpha;
|
||||||
|
p->a1 = 2 * ((A - 1) - (A + 1) * cos(w0));
|
||||||
|
p->a2 = (A + 1) - (A - 1) * cos(w0) - 2 * sqrt(A) * alpha;
|
||||||
|
p->b0 = A * ((A + 1) + (A - 1) * cos(w0) + 2 * sqrt(A) * alpha);
|
||||||
|
p->b1 =-2 * A * ((A - 1) + (A + 1) * cos(w0));
|
||||||
|
p->b2 = A * ((A + 1) + (A - 1) * cos(w0) - 2 * sqrt(A) * alpha);
|
||||||
|
break;
|
||||||
|
case bandpass:
|
||||||
|
if (p->csg) {
|
||||||
|
p->a0 = 1 + alpha;
|
||||||
|
p->a1 = -2 * cos(w0);
|
||||||
|
p->a2 = 1 - alpha;
|
||||||
|
p->b0 = sin(w0) / 2;
|
||||||
|
p->b1 = 0;
|
||||||
|
p->b2 = -sin(w0) / 2;
|
||||||
|
} else {
|
||||||
|
p->a0 = 1 + alpha;
|
||||||
|
p->a1 = -2 * cos(w0);
|
||||||
|
p->a2 = 1 - alpha;
|
||||||
|
p->b0 = alpha;
|
||||||
|
p->b1 = 0;
|
||||||
|
p->b2 = -alpha;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case bandreject:
|
||||||
|
p->a0 = 1 + alpha;
|
||||||
|
p->a1 = -2 * cos(w0);
|
||||||
|
p->a2 = 1 - alpha;
|
||||||
|
p->b0 = 1;
|
||||||
|
p->b1 = -2 * cos(w0);
|
||||||
|
p->b2 = 1;
|
||||||
|
break;
|
||||||
|
case lowpass:
|
||||||
|
if (p->poles == 1) {
|
||||||
|
p->a0 = 1;
|
||||||
|
p->a1 = -exp(-w0);
|
||||||
|
p->a2 = 0;
|
||||||
|
p->b0 = 1 + p->a1;
|
||||||
|
p->b1 = 0;
|
||||||
|
p->b2 = 0;
|
||||||
|
} else {
|
||||||
|
p->a0 = 1 + alpha;
|
||||||
|
p->a1 = -2 * cos(w0);
|
||||||
|
p->a2 = 1 - alpha;
|
||||||
|
p->b0 = (1 - cos(w0)) / 2;
|
||||||
|
p->b1 = 1 - cos(w0);
|
||||||
|
p->b2 = (1 - cos(w0)) / 2;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case highpass:
|
||||||
|
if (p->poles == 1) {
|
||||||
|
p->a0 = 1;
|
||||||
|
p->a1 = -exp(-w0);
|
||||||
|
p->a2 = 0;
|
||||||
|
p->b0 = (1 - p->a1) / 2;
|
||||||
|
p->b1 = -p->b0;
|
||||||
|
p->b2 = 0;
|
||||||
|
} else {
|
||||||
|
p->a0 = 1 + alpha;
|
||||||
|
p->a1 = -2 * cos(w0);
|
||||||
|
p->a2 = 1 - alpha;
|
||||||
|
p->b0 = (1 + cos(w0)) / 2;
|
||||||
|
p->b1 = -(1 + cos(w0));
|
||||||
|
p->b2 = (1 + cos(w0)) / 2;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case allpass:
|
||||||
|
p->a0 = 1 + alpha;
|
||||||
|
p->a1 = -2 * cos(w0);
|
||||||
|
p->a2 = 1 - alpha;
|
||||||
|
p->b0 = 1 - alpha;
|
||||||
|
p->b1 = -2 * cos(w0);
|
||||||
|
p->b2 = 1 + alpha;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
av_assert0(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
p->a1 /= p->a0;
|
||||||
|
p->a2 /= p->a0;
|
||||||
|
p->b0 /= p->a0;
|
||||||
|
p->b1 /= p->a0;
|
||||||
|
p->b2 /= p->a0;
|
||||||
|
|
||||||
|
p->cache = av_realloc_f(p->cache, sizeof(ChanCache), inlink->channels);
|
||||||
|
if (!p->cache)
|
||||||
|
return AVERROR(ENOMEM);
|
||||||
|
|
||||||
|
switch (inlink->format) {
|
||||||
|
case AV_SAMPLE_FMT_S16P: p->filter = biquad_s16; break;
|
||||||
|
case AV_SAMPLE_FMT_S32P: p->filter = biquad_s32; break;
|
||||||
|
case AV_SAMPLE_FMT_FLTP: p->filter = biquad_flt; break;
|
||||||
|
case AV_SAMPLE_FMT_DBLP: p->filter = biquad_dbl; break;
|
||||||
|
default: av_assert0(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *buf)
|
||||||
|
{
|
||||||
|
BiquadsContext *p = inlink->dst->priv;
|
||||||
|
AVFilterLink *outlink = inlink->dst->outputs[0];
|
||||||
|
AVFilterBufferRef *out_buf;
|
||||||
|
int nb_samples = buf->audio->nb_samples;
|
||||||
|
int ch;
|
||||||
|
|
||||||
|
if (buf->perms & AV_PERM_WRITE) {
|
||||||
|
out_buf = buf;
|
||||||
|
} else {
|
||||||
|
out_buf = ff_get_audio_buffer(inlink, AV_PERM_WRITE, nb_samples);
|
||||||
|
if (!out_buf)
|
||||||
|
return AVERROR(ENOMEM);
|
||||||
|
out_buf->pts = buf->pts;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (ch = 0; ch < buf->audio->channels; ch++)
|
||||||
|
p->filter((const float *)buf->extended_data[ch],
|
||||||
|
(float *)out_buf->extended_data[ch], nb_samples,
|
||||||
|
&p->cache[ch].i1, &p->cache[ch].i2,
|
||||||
|
&p->cache[ch].o1, &p->cache[ch].o2,
|
||||||
|
p->b0, p->b1, p->b2, p->a1, p->a2);
|
||||||
|
|
||||||
|
if (buf != out_buf)
|
||||||
|
avfilter_unref_buffer(buf);
|
||||||
|
|
||||||
|
return ff_filter_frame(outlink, out_buf);
|
||||||
|
}
|
||||||
|
|
||||||
|
static av_cold void uninit(AVFilterContext *ctx)
|
||||||
|
{
|
||||||
|
BiquadsContext *p = ctx->priv;
|
||||||
|
|
||||||
|
av_freep(&p->cache);
|
||||||
|
av_opt_free(p);
|
||||||
|
}
|
||||||
|
|
||||||
|
static const AVFilterPad inputs[] = {
|
||||||
|
{
|
||||||
|
.name = "default",
|
||||||
|
.type = AVMEDIA_TYPE_AUDIO,
|
||||||
|
.filter_frame = filter_frame,
|
||||||
|
},
|
||||||
|
{ NULL }
|
||||||
|
};
|
||||||
|
|
||||||
|
static const AVFilterPad outputs[] = {
|
||||||
|
{
|
||||||
|
.name = "default",
|
||||||
|
.type = AVMEDIA_TYPE_AUDIO,
|
||||||
|
.config_props = config_output,
|
||||||
|
},
|
||||||
|
{ NULL }
|
||||||
|
};
|
||||||
|
|
||||||
|
#define OFFSET(x) offsetof(BiquadsContext, x)
|
||||||
|
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
||||||
|
|
||||||
|
#define DEFINE_BIQUAD_FILTER(name_, description_) \
|
||||||
|
AVFILTER_DEFINE_CLASS(name_); \
|
||||||
|
static av_cold int name_##_init(AVFilterContext *ctx, const char *args) \
|
||||||
|
{ \
|
||||||
|
BiquadsContext *p = ctx->priv; \
|
||||||
|
p->class = &name_##_class; \
|
||||||
|
p->filter_type = name_; \
|
||||||
|
return init(ctx, args); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
AVFilter avfilter_af_##name_ = { \
|
||||||
|
.name = #name_, \
|
||||||
|
.description = NULL_IF_CONFIG_SMALL(description_), \
|
||||||
|
.priv_size = sizeof(BiquadsContext), \
|
||||||
|
.init = name_##_init, \
|
||||||
|
.uninit = uninit, \
|
||||||
|
.query_formats = query_formats, \
|
||||||
|
.inputs = inputs, \
|
||||||
|
.outputs = outputs, \
|
||||||
|
.priv_class = &name_##_class, \
|
||||||
|
}
|
||||||
|
|
||||||
|
#if CONFIG_EQUALIZER_FILTER
|
||||||
|
static const AVOption equalizer_options[] = {
|
||||||
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 999, FLAGS},
|
||||||
|
{"w", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 999, FLAGS},
|
||||||
|
{"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
||||||
|
{"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(equalizer, "Apply two-pole peaking equalization (EQ) filter.");
|
||||||
|
#endif /* CONFIG_EQUALIZER_FILTER */
|
||||||
|
#if CONFIG_BASS_FILTER
|
||||||
|
static const AVOption bass_options[] = {
|
||||||
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
|
||||||
|
{"w", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
|
||||||
|
{"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
||||||
|
{"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(bass, "Boost or cut lower frequencies.");
|
||||||
|
#endif /* CONFIG_BASS_FILTER */
|
||||||
|
#if CONFIG_TREBLE_FILTER
|
||||||
|
static const AVOption treble_options[] = {
|
||||||
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
|
||||||
|
{"w", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
|
||||||
|
{"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
||||||
|
{"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(treble, "Boost or cut upper frequencies.");
|
||||||
|
#endif /* CONFIG_TREBLE_FILTER */
|
||||||
|
#if CONFIG_BANDPASS_FILTER
|
||||||
|
static const AVOption bandpass_options[] = {
|
||||||
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 999, FLAGS},
|
||||||
|
{"w", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 999, FLAGS},
|
||||||
|
{"csg", "use constant skirt gain", OFFSET(csg), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(bandpass, "Apply a two-pole Butterworth band-pass filter.");
|
||||||
|
#endif /* CONFIG_BANDPASS_FILTER */
|
||||||
|
#if CONFIG_BANDREJECT_FILTER
|
||||||
|
static const AVOption bandreject_options[] = {
|
||||||
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 999, FLAGS},
|
||||||
|
{"w", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 999, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(bandreject, "Apply a two-pole Butterworth band-reject filter.");
|
||||||
|
#endif /* CONFIG_BANDREJECT_FILTER */
|
||||||
|
#if CONFIG_LOWPASS_FILTER
|
||||||
|
static const AVOption lowpass_options[] = {
|
||||||
|
{"frequency", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=500}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=500}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
|
||||||
|
{"w", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
|
||||||
|
{"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, FLAGS},
|
||||||
|
{"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(lowpass, "Apply a low-pass filter with 3dB point frequency.");
|
||||||
|
#endif /* CONFIG_LOWPASS_FILTER */
|
||||||
|
#if CONFIG_HIGHPASS_FILTER
|
||||||
|
static const AVOption highpass_options[] = {
|
||||||
|
{"frequency", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
|
||||||
|
{"w", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
|
||||||
|
{"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, FLAGS},
|
||||||
|
{"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(highpass, "Apply a high-pass filter with 3dB point frequency.");
|
||||||
|
#endif /* CONFIG_HIGHPASS_FILTER */
|
||||||
|
#if CONFIG_ALLPASS_FILTER
|
||||||
|
static const AVOption allpass_options[] = {
|
||||||
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
||||||
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=HZ}, HZ, SLOPE, FLAGS, "width_type"},
|
||||||
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HZ}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
|
||||||
|
{"width", "set filter-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=707.1}, 0, 99999, FLAGS},
|
||||||
|
{"w", "set filter-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=707.1}, 0, 99999, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(allpass, "Apply a two-pole all-pass filter.");
|
||||||
|
#endif /* CONFIG_ALLPASS_FILTER */
|
||||||
|
#if CONFIG_BIQUAD_FILTER
|
||||||
|
static const AVOption biquad_options[] = {
|
||||||
|
{"a0", NULL, OFFSET(a0), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT16_MAX, INT16_MAX, FLAGS},
|
||||||
|
{"a1", NULL, OFFSET(a1), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT16_MAX, INT16_MAX, FLAGS},
|
||||||
|
{"a2", NULL, OFFSET(a2), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT16_MAX, INT16_MAX, FLAGS},
|
||||||
|
{"b0", NULL, OFFSET(b0), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT16_MAX, INT16_MAX, FLAGS},
|
||||||
|
{"b1", NULL, OFFSET(b1), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT16_MAX, INT16_MAX, FLAGS},
|
||||||
|
{"b2", NULL, OFFSET(b2), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT16_MAX, INT16_MAX, FLAGS},
|
||||||
|
{NULL},
|
||||||
|
};
|
||||||
|
|
||||||
|
DEFINE_BIQUAD_FILTER(biquad, "Apply a biquad IIR filter with the given coefficients.");
|
||||||
|
#endif /* CONFIG_BIQUAD_FILTER */
|
||||||
@ -47,6 +47,7 @@ void avfilter_register_all(void)
|
|||||||
REGISTER_FILTER(ACONVERT, aconvert, af);
|
REGISTER_FILTER(ACONVERT, aconvert, af);
|
||||||
REGISTER_FILTER(AFADE, afade, af);
|
REGISTER_FILTER(AFADE, afade, af);
|
||||||
REGISTER_FILTER(AFORMAT, aformat, af);
|
REGISTER_FILTER(AFORMAT, aformat, af);
|
||||||
|
REGISTER_FILTER(ALLPASS, allpass, af);
|
||||||
REGISTER_FILTER(AMERGE, amerge, af);
|
REGISTER_FILTER(AMERGE, amerge, af);
|
||||||
REGISTER_FILTER(AMIX, amix, af);
|
REGISTER_FILTER(AMIX, amix, af);
|
||||||
REGISTER_FILTER(ANULL, anull, af);
|
REGISTER_FILTER(ANULL, anull, af);
|
||||||
@ -62,14 +63,22 @@ void avfilter_register_all(void)
|
|||||||
REGISTER_FILTER(ASTREAMSYNC, astreamsync, af);
|
REGISTER_FILTER(ASTREAMSYNC, astreamsync, af);
|
||||||
REGISTER_FILTER(ASYNCTS, asyncts, af);
|
REGISTER_FILTER(ASYNCTS, asyncts, af);
|
||||||
REGISTER_FILTER(ATEMPO, atempo, af);
|
REGISTER_FILTER(ATEMPO, atempo, af);
|
||||||
|
REGISTER_FILTER(BANDPASS, bandpass, af);
|
||||||
|
REGISTER_FILTER(BANDREJECT, bandreject, af);
|
||||||
|
REGISTER_FILTER(BASS, bass, af);
|
||||||
|
REGISTER_FILTER(BIQUAD, biquad, af);
|
||||||
REGISTER_FILTER(CHANNELMAP, channelmap, af);
|
REGISTER_FILTER(CHANNELMAP, channelmap, af);
|
||||||
REGISTER_FILTER(CHANNELSPLIT, channelsplit, af);
|
REGISTER_FILTER(CHANNELSPLIT, channelsplit, af);
|
||||||
REGISTER_FILTER(EARWAX, earwax, af);
|
REGISTER_FILTER(EARWAX, earwax, af);
|
||||||
REGISTER_FILTER(EBUR128, ebur128, af);
|
REGISTER_FILTER(EBUR128, ebur128, af);
|
||||||
|
REGISTER_FILTER(EQUALIZER, equalizer, af);
|
||||||
|
REGISTER_FILTER(HIGHPASS, highpass, af);
|
||||||
REGISTER_FILTER(JOIN, join, af);
|
REGISTER_FILTER(JOIN, join, af);
|
||||||
|
REGISTER_FILTER(LOWPASS, lowpass, af);
|
||||||
REGISTER_FILTER(PAN, pan, af);
|
REGISTER_FILTER(PAN, pan, af);
|
||||||
REGISTER_FILTER(RESAMPLE, resample, af);
|
REGISTER_FILTER(RESAMPLE, resample, af);
|
||||||
REGISTER_FILTER(SILENCEDETECT, silencedetect, af);
|
REGISTER_FILTER(SILENCEDETECT, silencedetect, af);
|
||||||
|
REGISTER_FILTER(TREBLE, treble, af);
|
||||||
REGISTER_FILTER(VOLUME, volume, af);
|
REGISTER_FILTER(VOLUME, volume, af);
|
||||||
REGISTER_FILTER(VOLUMEDETECT, volumedetect, af);
|
REGISTER_FILTER(VOLUMEDETECT, volumedetect, af);
|
||||||
|
|
||||||
|
|||||||
@ -29,8 +29,8 @@
|
|||||||
#include "libavutil/avutil.h"
|
#include "libavutil/avutil.h"
|
||||||
|
|
||||||
#define LIBAVFILTER_VERSION_MAJOR 3
|
#define LIBAVFILTER_VERSION_MAJOR 3
|
||||||
#define LIBAVFILTER_VERSION_MINOR 34
|
#define LIBAVFILTER_VERSION_MINOR 35
|
||||||
#define LIBAVFILTER_VERSION_MICRO 101
|
#define LIBAVFILTER_VERSION_MICRO 100
|
||||||
|
|
||||||
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
|
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
|
||||||
LIBAVFILTER_VERSION_MINOR, \
|
LIBAVFILTER_VERSION_MINOR, \
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user