mirror of https://github.com/thesofproject/sof.git
33 lines
1.0 KiB
Markdown
33 lines
1.0 KiB
Markdown
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DC Blocking Filter Control Bytes Generator
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=======================================
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This is a tool to generate the topology control bytes file (.m4) and configuration
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files used by sof-ctl. See example_dcblock.m for reference on how to use it.
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The tools need GNU Octave version 4.0.0 or later with octave-signal
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package.
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dcblock_build_blob.m
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---------------
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This script takes an array of floating point coefficients and the endianness.
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Returns a blob used to configure the binary controls of the DC Blocking Filter
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component.
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The blob can be passed to alsactl_write(), blob_write(), tplg_write() to generate
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a CSV text, binary and topology file respectively.
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dcblock_plot_transferfn.m
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---------------
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This script takes the R coefficient and the sampling frequency to plot the
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Frequency Response of the DCB filter H(z) = (1-1/z)/(1-R/z).
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dcblock_plot_stepfn.m
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--------------
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This script takes the R coefficient and the sampling frequency to plot the
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Step Response of the DCB filter. It is useful to visualize how the DC component
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of a signal reacts to the filter.
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