Convolutional coder and decoder in C

I was in need of a convolutional coder and viterbi/BCJR decoder in C, and, well, I couldn't find anything suitable. So unfortunately, I had to write one.

To avoid others having the same problem, I've uploaded mine.

The API is described in the convcode.h file.

This supports tail-biting, soft decoding, recursive coders, and BCJR (sort of) decoding. See the API for a description.

Compile with -DCONVCODE_TESTS to enable tests and a main(). Search for "Test code" in convcode.c for details on how to use it. Compiling with "make" here will compile with that enabled, "make check" will run the tests.

You can use this and do your own memory allocation, if you like. See the discussion at the end of convcode.h for details. It is recommended that you use alloc_convcode, though, unless you really need to do your own allocation.