diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/conv_acc.c | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/src/conv_acc.c b/src/conv_acc.c index c4545d70..7f036284 100644 --- a/src/conv_acc.c +++ b/src/conv_acc.c @@ -413,10 +413,21 @@ static struct vtrellis *generate_trellis(const struct osmo_conv_code *code) rc = gen_state_info(&trellis->vals[i], i, outputs, code); } + + if (rc < 0) + goto fail; + + /* Set accumulated path metrics to zero */ + trellis->sums[i] = 0; } - if (rc < 0) - goto fail; + /** + * For termination other than tail-biting, initialize the zero state + * as the encoder starting state. Initialize with the maximum + * accumulated sum at length equal to the constraint length. + */ + if (code->term != CONV_TERM_TAIL_BITING) + trellis->sums[0] = INT8_MAX * code->N * code->K; return trellis; @@ -425,22 +436,6 @@ fail: return NULL; } -/* Reset decoder - * Set accumulated path metrics to zero. For termination other than - * tail-biting, initialize the zero state as the encoder starting state. - * Initialize with the maximum accumulated sum at length equal to the - * constraint length. - */ -static void reset_decoder(struct vdecoder *dec, int term) -{ - int ns = dec->trellis->num_states; - - memset(dec->trellis->sums, 0, sizeof(int16_t) * ns); - - if (term != CONV_TERM_TAIL_BITING) - dec->trellis->sums[0] = INT8_MAX * dec->n * dec->k; -} - static void _traceback(struct vdecoder *dec, unsigned state, uint8_t *out, int len) { @@ -641,8 +636,6 @@ static int conv_decode(struct vdecoder *dec, const int8_t *seq, { int8_t depunc[dec->len * dec->n]; - reset_decoder(dec, term); - if (punc) { depuncture(seq, punc, depunc, dec->len * dec->n); seq = depunc; |