dib8000_viterbi_state
dib8000_viterbi_state(state, 0); /* force chan dec in restart */
dib8000_viterbi_state(state, 1); /* start viterbi chandec */
dib8000_viterbi_state(state, 1); /* start viterbi chandec */
dib8000_viterbi_state(state, 1); /* start viterbi chandec */