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tsdecrypt
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tsdecrypt reads and decrypts CSA encrypted incoming mpeg transport stream over UDP/RTP using code words obtained from OSCAM or similar CAM server. tsdecrypt communicates with CAM server using cs378x (camd35 over tcp) protocol or newcamd protocol. https://georgi.unixsol.org/programs/tsdecrypt/
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tsdecrypt/FFdecsa/docs/how_to_understand.txt

how_to_understand.txt 548B
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  1. -------

  2. FFdecsa

  3. -------

  4. 

  5. First, you need to know how decsa works, study the source of a classical

  6. implementation. Then you have to understand how things are done in

  7. slicing mode. Read all the documentation and have a working classical

  8. implementation to compare partial results. There are comments spread

  9. around the code. Some things are difficult to understand without paper

  10. notes; for example the matrix transpositions and meaning of array

  11. indices.

  12. 

  13. Sorry, it is hard to understand and modify ...

  14. 

  15. ... but it was harder to design and implement!!!