Compression Support & New sigmf.fromarray method#146
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777arc
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Apr 29, 2026
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I'm actually going to block my own PR here and slightly improve this before we merge it.
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* fromarray() only creates SigMFFile object from numpy array, doesn't write files * SigMFFile.tofile() auto-detects archive/compression from extension * when data_buffer exists, will also write `.sigmf-data`, like when using (SigMFGenerator) * added more tests
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sigmf.tofile methodsigmf.fromarray method
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Closes #26. Adds read/write support for compressed SigMF archives (
.sigmf.gz,.sigmf.xz,.sigmf.zip) using only stdlib so no new dependencies are needed. Compression usestarfilefor gzip/xz andzipfilefor zip.Also fixed performance issue where reading uncompressed
.sigmfarchives was extracting data to RAM — these are now numpy memmapped directly into the tar.Also added a
sigmf.fromarray()convenience function to mirrorsigmf.fromfile(). It infers the SigMF datatype from the numpy dtype. This can then be used with existing tofile() method: