Here is a list of all files with brief descriptions:

examples/LDPC/ldpc_2/ldpc_decoder/alist.h	Definition of a class to hold sparse matrices in alist-format
lib/fec/ldpc/alist.h	Definition of a class to hold sparse matrices in alist-format
api.h
argmax.h
basis.h
cc_depuncture.h
cc_depuncture_impl.h
ccsds.h
examples/LDPC/ldpc_2/ldpc_decoder/checknode.h
lib/fec/ldpc/checknode.h
bch/libcrc-2.0/include/checksum.h
BCH_BASE/CRC/libcrc-2.0/include/checksum.h
colors.h
comm.h
convDecoder.h
convDecoder_impl.h
convEncoder.h
convEncoder_impl.h
createCADU.h
createCADU_impl.h
examples/LDPC/ldpc_2/ldpc_decoder/debug.h
lib/fec/bch/debug.h
lib/fec/BCH_BASE/CRC/debug.h
lib/fec/ReedSolomon/debug.h
lib/fec/ReedSolomon/older/debug.h
lib/fec/Scrambler/debug.h
decodeLDPC.h
decodeLDPC_impl.h
decodeRS.h
decodeRS_impl.h
decodeTurbo.h
decodeTurbo_impl.h
djelic_bch.h
encodeLDPC.h
encodeLDPC_impl.h
encodeRS.h
encodeRS_impl.h
encodeTurbo.h
encodeTurbo_impl.h
errno.h
example.h
extractCADU.h
extractCADU_impl.h
ezcod.h
genCADU.h
genCADU_impl.h
generateCADU.h
generateCADU_impl.h
generateCLTU.h
generateCLTU_impl.h
examples/LDPC/ldpc_2/ldpc_decoder/ldpc.h
lib/fec/ldpc/ldpc.h
ldpc_encoder.h
backup/libconvcodes.h
deepspace-turbo/libconvcodes.h
libconvcodes.h
backup/libturbocodes.h
deepspace-turbo/libturbocodes.h
libturbocodes.h
processCADU.h
processCADU_impl.h
recoverCADU.h
recoverCADU_impl.h
recoverCADUSoft.h
recoverCADUSoft_impl.h
reedsolomon.h
older/ReedSolomon.h
ReedSolomon.h
older/ReedSolomon_CCSDS.h
ReedSolomon_CCSDS.h
rs.h
rs_decode.h
rs_encode.h
rskey.h
rspwd.h
Scrambler.h
Scrambler_CCSDS.h
simplifiedPLOP1.h
simplifiedPLOP1_impl.h
synchronizeCADU.h
synchronizeCADU_impl.h
synchronizeCADUArgMax.h
synchronizeCADUArgMax_impl.h
synchronizeCADUHard.h
synchronizeCADUHard_impl.h
synchronizeCADUSoft.h
synchronizeCADUSoft_impl.h
bch/libcrc-2.0/test/testall.h
BCH_BASE/CRC/libcrc-2.0/test/testall.h
utilities.h
examples/LDPC/ldpc_2/ldpc_decoder/variablenode.h
lib/fec/ldpc/variablenode.h