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GStreamer Good Plugins 1.0 Plugins Reference Manual | ![]() |
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Top | Description | Object Hierarchy | Properties |
GObject +----GInitiallyUnowned +----GstObject +----GstElement +----GstBaseTransform +----GstAudioFilter +----GstAudioFXBaseFIRFilter +----GstAudioWSincLimit
"frequency" gdouble : Read / Write "length" gint : Read / Write "mode" GstAudioWSincLimitMode : Read / Write "window" GstAudioWSincLimitWindow : Read / Write "cutoff" gfloat : Read / Write
Attenuates all frequencies above the cutoff frequency (low-pass) or all frequencies below the cutoff frequency (high-pass). The length parameter controls the rolloff, the window parameter controls rolloff and stopband attenuation. The Hamming window provides a faster rolloff but a bit worse stopband attenuation, the other way around for the Blackman window.
This element has the advantage over the Chebyshev lowpass and highpass filter that it has a much better rolloff when using a larger kernel size and almost linear phase. The only disadvantage is the much slower execution time with larger kernels.