11 static inline int printw(int c, FILE *fp)
15 if (c == 0) return fputc('0', fp);
16 for (l = 0, x = c < 0? -c : c; x > 0; x /= 10) buf[l++] = x%10 + '0';
17 if (c < 0) buf[l++] = '-';
19 for (x = 0; x < l/2; ++x) {
20 int y = buf[x]; buf[x] = buf[l-1-x]; buf[l-1-x] = y;
26 static inline void pileup_seq(const bam_pileup1_t *p, int pos, int ref_len, const char *ref)
31 putchar(p->b->core.qual > 93? 126 : p->b->core.qual + 33);
34 int c = bam_nt16_rev_table[bam1_seqi(bam1_seq(p->b), p->qpos)];
36 int rb = pos < ref_len? ref[pos] : 'N';
37 if (c == '=' || bam_nt16_table[c] == bam_nt16_table[rb]) c = bam1_strand(p->b)? ',' : '.';
38 else c = bam1_strand(p->b)? tolower(c) : toupper(c);
40 if (c == '=') c = bam1_strand(p->b)? ',' : '.';
41 else c = bam1_strand(p->b)? tolower(c) : toupper(c);
44 } else putchar(p->is_refskip? (bam1_strand(p->b)? '<' : '>') : '*');
46 putchar('+'); printw(p->indel, stdout);
47 for (j = 1; j <= p->indel; ++j) {
48 int c = bam_nt16_rev_table[bam1_seqi(bam1_seq(p->b), p->qpos + j)];
49 putchar(bam1_strand(p->b)? tolower(c) : toupper(c));
51 } else if (p->indel < 0) {
52 printw(p->indel, stdout);
53 for (j = 1; j <= -p->indel; ++j) {
54 int c = (ref && (int)pos+j < ref_len)? ref[pos+j] : 'N';
55 putchar(bam1_strand(p->b)? tolower(c) : toupper(c));
58 if (p->is_tail) putchar('$');
66 #define MPLP_NO_COMP 0x20
67 #define MPLP_NO_ORPHAN 0x40
68 #define MPLP_REALN 0x80
69 #define MPLP_FMT_DP 0x100
70 #define MPLP_FMT_SP 0x200
71 #define MPLP_NO_INDEL 0x400
72 #define MPLP_EXT_BAQ 0x800
73 #define MPLP_ILLUMINA13 0x1000
74 #define MPLP_IGNORE_RG 0x2000
75 #define MPLP_PRINT_POS 0x4000
76 #define MPLP_PRINT_MAPQ 0x8000
78 void *bed_read(const char *fn);
79 void bed_destroy(void *_h);
80 int bed_overlap(const void *_h, const char *chr, int beg, int end);
83 int max_mq, min_mq, flag, min_baseQ, capQ_thres, max_depth, max_indel_depth;
84 int openQ, extQ, tandemQ, min_support; // for indels
85 double min_frac; // for indels
97 const mplp_conf_t *conf;
106 static int mplp_func(void *data, bam1_t *b)
108 extern int bam_realn(bam1_t *b, const char *ref);
109 extern int bam_prob_realn_core(bam1_t *b, const char *ref, int);
110 extern int bam_cap_mapQ(bam1_t *b, char *ref, int thres);
111 mplp_aux_t *ma = (mplp_aux_t*)data;
115 ret = ma->iter? bam_iter_read(ma->fp, ma->iter, b) : bam_read1(ma->fp, b);
117 if (b->core.tid < 0 || (b->core.flag&BAM_FUNMAP)) { // exclude unmapped reads
121 if (ma->conf->bed) { // test overlap
122 skip = !bed_overlap(ma->conf->bed, ma->h->target_name[b->core.tid], b->core.pos, bam_calend(&b->core, bam1_cigar(b)));
125 if (ma->conf->rghash) { // exclude read groups
126 uint8_t *rg = bam_aux_get(b, "RG");
127 skip = (rg && bcf_str2id(ma->conf->rghash, (const char*)(rg+1)) >= 0);
130 if (ma->conf->flag & MPLP_ILLUMINA13) {
132 uint8_t *qual = bam1_qual(b);
133 for (i = 0; i < b->core.l_qseq; ++i)
134 qual[i] = qual[i] > 31? qual[i] - 31 : 0;
136 has_ref = (ma->ref && ma->ref_id == b->core.tid)? 1 : 0;
138 if (has_ref && (ma->conf->flag&MPLP_REALN)) bam_prob_realn_core(b, ma->ref, (ma->conf->flag & MPLP_EXT_BAQ)? 3 : 1);
139 if (has_ref && ma->conf->capQ_thres > 10) {
140 int q = bam_cap_mapQ(b, ma->ref, ma->conf->capQ_thres);
142 else if (b->core.qual > q) b->core.qual = q;
144 else if (b->core.qual < ma->conf->min_mq) skip = 1;
145 else if ((ma->conf->flag&MPLP_NO_ORPHAN) && (b->core.flag&1) && !(b->core.flag&2)) skip = 1;
150 static void group_smpl(mplp_pileup_t *m, bam_sample_t *sm, kstring_t *buf,
151 int n, char *const*fn, int *n_plp, const bam_pileup1_t **plp, int ignore_rg)
154 memset(m->n_plp, 0, m->n * sizeof(int));
155 for (i = 0; i < n; ++i) {
156 for (j = 0; j < n_plp[i]; ++j) {
157 const bam_pileup1_t *p = plp[i] + j;
160 q = ignore_rg? 0 : bam_aux_get(p->b, "RG");
161 if (q) id = bam_smpl_rg2smid(sm, fn[i], (char*)q+1, buf);
162 if (id < 0) id = bam_smpl_rg2smid(sm, fn[i], 0, buf);
163 if (id < 0 || id >= m->n) {
164 assert(q); // otherwise a bug
165 fprintf(stderr, "[%s] Read group %s used in file %s but absent from the header or an alignment missing read group.\n", __func__, (char*)q+1, fn[i]);
168 if (m->n_plp[id] == m->m_plp[id]) {
169 m->m_plp[id] = m->m_plp[id]? m->m_plp[id]<<1 : 8;
170 m->plp[id] = realloc(m->plp[id], sizeof(bam_pileup1_t) * m->m_plp[id]);
172 m->plp[id][m->n_plp[id]++] = *p;
177 static int mpileup(mplp_conf_t *conf, int n, char **fn)
179 extern void *bcf_call_add_rg(void *rghash, const char *hdtext, const char *list);
180 extern void bcf_call_del_rghash(void *rghash);
182 int i, tid, pos, *n_plp, tid0 = -1, beg0 = 0, end0 = 1u<<29, ref_len, ref_tid = -1, max_depth, max_indel_depth;
183 const bam_pileup1_t **plp;
189 bcf_callaux_t *bca = 0;
190 bcf_callret1_t *bcr = 0;
195 bam_sample_t *sm = 0;
199 memset(&gplp, 0, sizeof(mplp_pileup_t));
200 memset(&buf, 0, sizeof(kstring_t));
201 memset(&bc, 0, sizeof(bcf_call_t));
202 data = calloc(n, sizeof(void*));
203 plp = calloc(n, sizeof(void*));
204 n_plp = calloc(n, sizeof(int*));
205 sm = bam_smpl_init();
207 // read the header and initialize data
208 for (i = 0; i < n; ++i) {
210 data[i] = calloc(1, sizeof(mplp_aux_t));
211 data[i]->fp = strcmp(fn[i], "-") == 0? bam_dopen(fileno(stdin), "r") : bam_open(fn[i], "r");
212 data[i]->conf = conf;
213 h_tmp = bam_header_read(data[i]->fp);
214 data[i]->h = i? h : h_tmp; // for i==0, "h" has not been set yet
215 bam_smpl_add(sm, fn[i], (conf->flag&MPLP_IGNORE_RG)? 0 : h_tmp->text);
216 rghash = bcf_call_add_rg(rghash, h_tmp->text, conf->pl_list);
220 idx = bam_index_load(fn[i]);
222 fprintf(stderr, "[%s] fail to load index for %d-th input.\n", __func__, i+1);
225 if (bam_parse_region(h_tmp, conf->reg, &tid, &beg, &end) < 0) {
226 fprintf(stderr, "[%s] malformatted region or wrong seqname for %d-th input.\n", __func__, i+1);
229 if (i == 0) tid0 = tid, beg0 = beg, end0 = end;
230 data[i]->iter = bam_iter_query(idx, tid, beg, end);
231 bam_index_destroy(idx);
233 if (i == 0) h = h_tmp;
235 // FIXME: to check consistency
236 bam_header_destroy(h_tmp);
240 gplp.n_plp = calloc(sm->n, sizeof(int));
241 gplp.m_plp = calloc(sm->n, sizeof(int));
242 gplp.plp = calloc(sm->n, sizeof(void*));
244 fprintf(stderr, "[%s] %d samples in %d input files\n", __func__, sm->n, n);
245 // write the VCF header
246 if (conf->flag & MPLP_GLF) {
248 bh = calloc(1, sizeof(bcf_hdr_t));
249 s.l = s.m = 0; s.s = 0;
250 bp = bcf_open("-", (conf->flag&MPLP_NO_COMP)? "wu" : "w");
251 for (i = 0; i < h->n_targets; ++i) {
252 kputs(h->target_name[i], &s);
256 bh->name = malloc(s.l);
257 memcpy(bh->name, s.s, s.l);
259 for (i = 0; i < sm->n; ++i) {
260 kputs(sm->smpl[i], &s); kputc('\0', &s);
263 bh->sname = malloc(s.l);
264 memcpy(bh->sname, s.s, s.l);
265 bh->txt = malloc(strlen(BAM_VERSION) + 64);
266 bh->l_txt = 1 + sprintf(bh->txt, "##samtoolsVersion=%s\n", BAM_VERSION);
269 bcf_hdr_write(bp, bh);
270 bca = bcf_call_init(-1., conf->min_baseQ);
271 bcr = calloc(sm->n, sizeof(bcf_callret1_t));
272 bca->rghash = rghash;
273 bca->openQ = conf->openQ, bca->extQ = conf->extQ, bca->tandemQ = conf->tandemQ;
274 bca->min_frac = conf->min_frac;
275 bca->min_support = conf->min_support;
277 if (tid0 >= 0 && conf->fai) { // region is set
278 ref = faidx_fetch_seq(conf->fai, h->target_name[tid0], 0, 0x7fffffff, &ref_len);
280 for (i = 0; i < n; ++i) data[i]->ref = ref, data[i]->ref_id = tid0;
281 } else ref_tid = -1, ref = 0;
282 iter = bam_mplp_init(n, mplp_func, (void**)data);
283 max_depth = conf->max_depth;
284 if (max_depth * sm->n > 1<<20)
285 fprintf(stderr, "(%s) Max depth is above 1M. Potential memory hog!\n", __func__);
286 if (max_depth * sm->n < 8000) {
287 max_depth = 8000 / sm->n;
288 fprintf(stderr, "<%s> Set max per-file depth to %d\n", __func__, max_depth);
290 max_indel_depth = conf->max_indel_depth * sm->n;
291 bam_mplp_set_maxcnt(iter, max_depth);
292 while (bam_mplp_auto(iter, &tid, &pos, n_plp, plp) > 0) {
293 if (conf->reg && (pos < beg0 || pos >= end0)) continue; // out of the region requested
294 if (conf->bed && tid >= 0 && !bed_overlap(conf->bed, h->target_name[tid], pos, pos+1)) continue;
295 if (tid != ref_tid) {
297 if (conf->fai) ref = faidx_fetch_seq(conf->fai, h->target_name[tid], 0, 0x7fffffff, &ref_len);
298 for (i = 0; i < n; ++i) data[i]->ref = ref, data[i]->ref_id = tid;
301 if (conf->flag & MPLP_GLF) {
302 int total_depth, _ref0, ref16;
303 bcf1_t *b = calloc(1, sizeof(bcf1_t));
304 for (i = total_depth = 0; i < n; ++i) total_depth += n_plp[i];
305 group_smpl(&gplp, sm, &buf, n, fn, n_plp, plp, conf->flag & MPLP_IGNORE_RG);
306 _ref0 = (ref && pos < ref_len)? ref[pos] : 'N';
307 ref16 = bam_nt16_table[_ref0];
308 for (i = 0; i < gplp.n; ++i)
309 bcf_call_glfgen(gplp.n_plp[i], gplp.plp[i], ref16, bca, bcr + i);
310 bcf_call_combine(gplp.n, bcr, ref16, &bc);
311 bcf_call2bcf(tid, pos, &bc, b, (conf->flag&(MPLP_FMT_DP|MPLP_FMT_SP))? bcr : 0,
312 (conf->flag&MPLP_FMT_SP), 0, 0);
313 bcf_write(bp, bh, b);
316 if (!(conf->flag&MPLP_NO_INDEL) && total_depth < max_indel_depth && bcf_call_gap_prep(gplp.n, gplp.n_plp, gplp.plp, pos, bca, ref, rghash) >= 0) {
317 for (i = 0; i < gplp.n; ++i)
318 bcf_call_glfgen(gplp.n_plp[i], gplp.plp[i], -1, bca, bcr + i);
319 if (bcf_call_combine(gplp.n, bcr, -1, &bc) >= 0) {
320 b = calloc(1, sizeof(bcf1_t));
321 bcf_call2bcf(tid, pos, &bc, b, (conf->flag&(MPLP_FMT_DP|MPLP_FMT_SP))? bcr : 0,
322 (conf->flag&MPLP_FMT_SP), bca, ref);
323 bcf_write(bp, bh, b);
328 printf("%s\t%d\t%c", h->target_name[tid], pos + 1, (ref && pos < ref_len)? ref[pos] : 'N');
329 for (i = 0; i < n; ++i) {
331 printf("\t%d\t", n_plp[i]);
333 printf("*\t*"); // FIXME: printf() is very slow...
334 if (conf->flag & MPLP_PRINT_POS) printf("\t*");
336 for (j = 0; j < n_plp[i]; ++j)
337 pileup_seq(plp[i] + j, pos, ref_len, ref);
339 for (j = 0; j < n_plp[i]; ++j) {
340 const bam_pileup1_t *p = plp[i] + j;
341 int c = bam1_qual(p->b)[p->qpos] + 33;
342 if (c > 126) c = 126;
345 if (conf->flag & MPLP_PRINT_MAPQ) {
347 for (j = 0; j < n_plp[i]; ++j) {
348 int c = plp[i][j].b->core.qual + 33;
349 if (c > 126) c = 126;
353 if (conf->flag & MPLP_PRINT_POS) {
355 for (j = 0; j < n_plp[i]; ++j) {
356 if (j > 0) putchar(',');
357 printf("%d", plp[i][j].qpos + 1); // FIXME: printf() is very slow...
367 bam_smpl_destroy(sm); free(buf.s);
368 for (i = 0; i < gplp.n; ++i) free(gplp.plp[i]);
369 free(gplp.plp); free(gplp.n_plp); free(gplp.m_plp);
370 bcf_call_del_rghash(rghash);
371 bcf_hdr_destroy(bh); bcf_call_destroy(bca); free(bc.PL); free(bcr);
372 bam_mplp_destroy(iter);
373 bam_header_destroy(h);
374 for (i = 0; i < n; ++i) {
375 bam_close(data[i]->fp);
376 if (data[i]->iter) bam_iter_destroy(data[i]->iter);
379 free(data); free(plp); free(ref); free(n_plp);
383 #define MAX_PATH_LEN 1024
384 static int read_file_list(const char *file_list,int *n,char **argv[])
386 char buf[MAX_PATH_LEN];
390 FILE *fh = fopen(file_list,"r");
393 fprintf(stderr,"%s: %s\n", file_list,strerror(errno));
397 // Speed is not an issue here, determine the number of files by reading the file twice
399 while ( fgets(buf,MAX_PATH_LEN,fh) ) nfiles++;
401 if ( fseek(fh, 0L, SEEK_SET) )
403 fprintf(stderr,"%s: %s\n", file_list,strerror(errno));
407 files = calloc(nfiles,sizeof(char*));
409 while ( fgets(buf,MAX_PATH_LEN,fh) )
412 while ( len>0 && isspace(buf[len-1]) ) len--;
413 if ( !len ) continue;
415 files[nfiles] = malloc(sizeof(char)*(len+1));
416 strncpy(files[nfiles],buf,len);
417 files[nfiles][len] = 0;
423 fprintf(stderr,"No files read from %s\n", file_list);
432 int bam_mpileup(int argc, char *argv[])
435 const char *file_list = NULL;
437 int nfiles = 0, use_orphan = 0;
439 memset(&mplp, 0, sizeof(mplp_conf_t));
440 #define MPLP_PRINT_POS 0x4000
444 mplp.max_depth = 250; mplp.max_indel_depth = 250;
445 mplp.openQ = 40; mplp.extQ = 20; mplp.tandemQ = 100;
446 mplp.min_frac = 0.002; mplp.min_support = 1;
447 mplp.flag = MPLP_NO_ORPHAN | MPLP_REALN;
448 while ((c = getopt(argc, argv, "Agf:r:l:M:q:Q:uaRC:BDSd:L:b:P:o:e:h:Im:F:EG:6Os")) >= 0) {
451 mplp.fai = fai_load(optarg);
452 if (mplp.fai == 0) return 1;
454 case 'd': mplp.max_depth = atoi(optarg); break;
455 case 'r': mplp.reg = strdup(optarg); break;
456 case 'l': mplp.bed = bed_read(optarg); break;
457 case 'P': mplp.pl_list = strdup(optarg); break;
458 case 'g': mplp.flag |= MPLP_GLF; break;
459 case 'u': mplp.flag |= MPLP_NO_COMP | MPLP_GLF; break;
460 case 'a': mplp.flag |= MPLP_NO_ORPHAN | MPLP_REALN; break;
461 case 'B': mplp.flag &= ~MPLP_REALN; break;
462 case 'D': mplp.flag |= MPLP_FMT_DP; break;
463 case 'S': mplp.flag |= MPLP_FMT_SP; break;
464 case 'I': mplp.flag |= MPLP_NO_INDEL; break;
465 case 'E': mplp.flag |= MPLP_EXT_BAQ; break;
466 case '6': mplp.flag |= MPLP_ILLUMINA13; break;
467 case 'R': mplp.flag |= MPLP_IGNORE_RG; break;
468 case 's': mplp.flag |= MPLP_PRINT_MAPQ; break;
469 case 'O': mplp.flag |= MPLP_PRINT_POS; break;
470 case 'C': mplp.capQ_thres = atoi(optarg); break;
471 case 'M': mplp.max_mq = atoi(optarg); break;
472 case 'q': mplp.min_mq = atoi(optarg); break;
473 case 'Q': mplp.min_baseQ = atoi(optarg); break;
474 case 'b': file_list = optarg; break;
475 case 'o': mplp.openQ = atoi(optarg); break;
476 case 'e': mplp.extQ = atoi(optarg); break;
477 case 'h': mplp.tandemQ = atoi(optarg); break;
478 case 'A': use_orphan = 1; break;
479 case 'F': mplp.min_frac = atof(optarg); break;
480 case 'm': mplp.min_support = atoi(optarg); break;
481 case 'L': mplp.max_indel_depth = atoi(optarg); break;
485 mplp.rghash = bcf_str2id_init();
486 if ((fp_rg = fopen(optarg, "r")) == 0)
487 fprintf(stderr, "(%s) Fail to open file %s. Continue anyway.\n", __func__, optarg);
488 while (!feof(fp_rg) && fscanf(fp_rg, "%s", buf) > 0) // this is not a good style, but forgive me...
489 bcf_str2id_add(mplp.rghash, strdup(buf));
495 if (use_orphan) mplp.flag &= ~MPLP_NO_ORPHAN;
497 fprintf(stderr, "\n");
498 fprintf(stderr, "Usage: samtools mpileup [options] in1.bam [in2.bam [...]]\n\n");
499 fprintf(stderr, "Input options:\n\n");
500 fprintf(stderr, " -6 assume the quality is in the Illumina-1.3+ encoding\n");
501 fprintf(stderr, " -A count anomalous read pairs\n");
502 fprintf(stderr, " -B disable BAQ computation\n");
503 fprintf(stderr, " -b FILE list of input BAM files [null]\n");
504 fprintf(stderr, " -C INT parameter for adjusting mapQ; 0 to disable [0]\n");
505 fprintf(stderr, " -d INT max per-BAM depth to avoid excessive memory usage [%d]\n", mplp.max_depth);
506 fprintf(stderr, " -E extended BAQ for higher sensitivity but lower specificity\n");
507 fprintf(stderr, " -f FILE faidx indexed reference sequence file [null]\n");
508 fprintf(stderr, " -G FILE exclude read groups listed in FILE [null]\n");
509 fprintf(stderr, " -l FILE list of positions (chr pos) or regions (BED) [null]\n");
510 fprintf(stderr, " -M INT cap mapping quality at INT [%d]\n", mplp.max_mq);
511 fprintf(stderr, " -r STR region in which pileup is generated [null]\n");
512 fprintf(stderr, " -R ignore RG tags\n");
513 fprintf(stderr, " -q INT skip alignments with mapQ smaller than INT [%d]\n", mplp.min_mq);
514 fprintf(stderr, " -Q INT skip bases with baseQ/BAQ smaller than INT [%d]\n", mplp.min_baseQ);
515 fprintf(stderr, "\nOutput options:\n\n");
516 fprintf(stderr, " -D output per-sample DP in BCF (require -g/-u)\n");
517 fprintf(stderr, " -g generate BCF output (genotype likelihoods)\n");
518 fprintf(stderr, " -O output base positions on reads (disabled by -g/-u)\n");
519 fprintf(stderr, " -s output mapping quality (disabled by -g/-u)\n");
520 fprintf(stderr, " -S output per-sample strand bias P-value in BCF (require -g/-u)\n");
521 fprintf(stderr, " -u generate uncompress BCF output\n");
522 fprintf(stderr, "\nSNP/INDEL genotype likelihoods options (effective with `-g' or `-u'):\n\n");
523 fprintf(stderr, " -e INT Phred-scaled gap extension seq error probability [%d]\n", mplp.extQ);
524 fprintf(stderr, " -F FLOAT minimum fraction of gapped reads for candidates [%g]\n", mplp.min_frac);
525 fprintf(stderr, " -h INT coefficient for homopolymer errors [%d]\n", mplp.tandemQ);
526 fprintf(stderr, " -I do not perform indel calling\n");
527 fprintf(stderr, " -L INT max per-sample depth for INDEL calling [%d]\n", mplp.max_indel_depth);
528 fprintf(stderr, " -m INT minimum gapped reads for indel candidates [%d]\n", mplp.min_support);
529 fprintf(stderr, " -o INT Phred-scaled gap open sequencing error probability [%d]\n", mplp.openQ);
530 fprintf(stderr, " -P STR comma separated list of platforms for indels [all]\n");
531 fprintf(stderr, "\n");
532 fprintf(stderr, "Notes: Assuming diploid individuals.\n\n");
536 if ( read_file_list(file_list,&nfiles,&fn) ) return 1;
537 mpileup(&mplp,nfiles,fn);
538 for (c=0; c<nfiles; c++) free(fn[c]);
540 } else mpileup(&mplp, argc - optind, argv + optind);
541 if (mplp.rghash) bcf_str2id_thorough_destroy(mplp.rghash);
542 free(mplp.reg); free(mplp.pl_list);
543 if (mplp.fai) fai_destroy(mplp.fai);
544 if (mplp.bed) bed_destroy(mplp.bed);