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better dealing with microrepeat

This commit is contained in:
Heng Li 2013-02-08 14:46:57 -05:00
parent 057b292dde
commit fdb0a7405f
2 changed files with 5 additions and 3 deletions
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6
bwamem.c
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@ -351,7 +351,7 @@ static inline int cal_max_gap(const mem_opt_t *opt, int qlen)
void mem_chain2aln(const mem_opt_t *opt, int64_t l_pac, const uint8_t *pac, int l_query, const uint8_t *query, const mem_chain_t *c, mem_alnreg_t *a)
{ // FIXME: in general, we SHOULD check funny seed patterns such as contained seeds. When that happens, we should use a SW or extend more seeds
int i, k;
int i, k, csub = 0;
int64_t rlen, rmax[2], tmp, max = 0, max_i = 0;
const mem_seed_t *s;
uint8_t *rseq = 0;
@ -403,10 +403,11 @@ void mem_chain2aln(const mem_opt_t *opt, int64_t l_pac, const uint8_t *pac, int
break;
}
if (i >= c->n) break; // all seeds are included; no need to proceed
if (a->score > best.score) best = *a;
if (a->score > best.score) csub = best.score, best = *a;
k = i;
}
if (a->score < best.score) *a = best;
a->csub = csub;
free(rseq);
// compute seedcov
@ -461,6 +462,7 @@ static inline int approx_mapq_se(const mem_opt_t *opt, const mem_alnreg_t *a)
{
int mapq, l, sub = a->sub? a->sub : opt->min_seed_len * opt->a;
double identity;
sub = a->csub > sub? a->csub : sub;
l = a->qe - a->qb > a->re - a->rb? a->qe - a->qb : a->re - a->rb;
mapq = a->score? (int)(MAPQ_COEF * (1. - (double)sub / a->score) * log(a->seedcov) + .499) : 0;
identity = 1. - (double)(l * opt->a - a->score) / (opt->a + opt->b) / l;

2
bwamem.h
View File

@ -31,7 +31,7 @@ typedef struct {
typedef struct {
int64_t rb, re;
int score, qb, qe, seedcov, sub; // sub: suboptimal score
int score, qb, qe, seedcov, sub, csub; // sub: suboptimal score; csub: suboptimal inside the chain
} mem_alnreg_t;
typedef kvec_t(mem_chain_t) mem_chain_v;