25e105026d
The sof_ucm_blob_write.m is an updated copy of blob_write that exports binary blobs with header that is suitable for ALSA UCM's cset-tlv command. The UCM requires binary files so the default binary export is changed for every component setup script to this format. The ASCII decimal numbers .txt format export remains suitable for sof-ctl tool. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> |
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| .. | ||
| README.md | ||
| dcblock_build_blob.m | ||
| dcblock_plot_stepfn.m | ||
| dcblock_plot_transferfn.m | ||
| example_dcblock.m | ||
README.md
DC Blocking Filter Control Bytes Generator
This is a tool to generate the topology control bytes file (.m4) and configuration files used by sof-ctl. See example_dcblock.m for reference on how to use it.
The tools need GNU Octave version 4.0.0 or later with octave-signal package.
dcblock_build_blob.m
This script takes an array of floating point coefficients and the endianness. Returns a blob used to configure the binary controls of the DC Blocking Filter component.
The blob can be passed to alsactl_write(), blob_write(), tplg_write() to generate a CSV text, binary and topology file respectively.
dcblock_plot_transferfn.m
This script takes the R coefficient and the sampling frequency to plot the Frequency Response of the DCB filter H(z) = (1-1/z)/(1-R/z).
dcblock_plot_stepfn.m
This script takes the R coefficient and the sampling frequency to plot the Step Response of the DCB filter. It is useful to visualize how the DC component of a signal reacts to the filter.