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scrappie_seqmappy.c
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scrappie_seqmappy.c
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#include <math.h>
#include <stdio.h>
//#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <unistd.h>
#include "decode.h"
#include "fast5_interface.h"
#include "kseq.h"
#include "networks.h"
#include "scrappie_common.h"
#include "scrappie_licence.h"
#include "scrappie_seq_helpers.h"
#include "scrappie_stdlib.h"
#include "util.h"
KSEQ_INIT(int, read)
// Doesn't play nice with other headers, include last
#include <argp.h>
extern const char *argp_program_version;
extern const char *argp_program_bug_address;
static char doc[] = "Scrappie seqmappy (local-global)";
static char args_doc[] = "fasta fast5";
static struct argp_option options[] = {
{"localpen", 'l', "float", 0, "Penalty for local matching"},
{"min_prob", 'm', "probability", 0, "Minimum bound on probability of match"},
{"output", 'o', "filename", 0, "Write to file rather than stdout"},
{"prefix", 'p', "string", 0, "Prefix to append to name of read"},
{"segmentation", 3, "chunk:percentile", 0, "Chunk size and percentile for variance based segmentation"},
{"skip", 's', "penalty", 0, "Penalty for skipping a base"},
{"stay", 'y', "penalty", 0, "Penalty for staying"},
{"trim", 't', "start:end", 0, "Number of samples to trim, as start:end"},
{"licence", 10, 0, 0, "Print licensing information"},
{"license", 11, 0, OPTION_ALIAS, "Print licensing information"},
{0}
};
typedef struct {
size_t n;
char * seq;
char * name;
} scrappie_seq_t;
struct arguments {
float local_pen;
float min_prob;
float skip_pen;
float stay_pen;
FILE * output;
char * prefix;
int trim_start;
int trim_end;
int varseg_chunk;
float varseg_thresh;
char * fasta_file;
char * fast5_file;
};
static struct arguments args = {
.local_pen = 4.0f,
.min_prob = 1e-5f,
.stay_pen = 0.0f,
.skip_pen = 0.0f,
.output = NULL,
.prefix = "",
.trim_start = 200,
.trim_end = 10,
.varseg_chunk = 100,
.varseg_thresh = 0.0f,
.fasta_file = NULL,
.fast5_file = NULL
};
static error_t parse_arg(int key, char *arg, struct argp_state *state) {
switch (key) {
int ret = 0;
char * next_tok = NULL;
case 'l':
args.local_pen = atof(arg);
break;
case 'm':
args.min_prob = atof(arg);
break;
case 'o':
args.output = fopen(arg, "w");
if(NULL == args.output){
errx(EXIT_FAILURE, "Failed to open \"%s\" for output.", arg);
}
break;
case 'p':
args.prefix = arg;
break;
case 's':
args.skip_pen = atof(arg);
assert(isfinite(args.skip_pen));
break;
case 't':
args.trim_start = atoi(strtok(arg, ":"));
next_tok = strtok(NULL, ":");
if(NULL != next_tok){
args.trim_end = atoi(next_tok);
} else {
args.trim_end = args.trim_start;
}
assert(args.trim_start >= 0);
assert(args.trim_end >= 0);
break;
case 'y':
args.stay_pen = atof(arg);
assert(isfinite(args.stay_pen));
break;
case 3:
args.varseg_chunk = atoi(strtok(arg, ":"));
next_tok = strtok(NULL, ":");
if(NULL == next_tok){
errx(EXIT_FAILURE, "--segmentation should be of form chunk:percentile");
}
args.varseg_thresh = atof(next_tok) / 100.0;
assert(args.varseg_chunk >= 0);
assert(args.varseg_thresh > 0.0 && args.varseg_thresh < 1.0);
break;
case 10:
case 11:
ret = fputs(scrappie_licence_text, stdout);
exit((EOF != ret) ? EXIT_SUCCESS : EXIT_FAILURE);
break;
case ARGP_KEY_NO_ARGS:
argp_usage(state);
break;
case ARGP_KEY_ARG:
args.fasta_file = state->argv[state->next - 1];
if(NULL == state->argv[state->next]){
errx(EXIT_FAILURE, "fast5 file is a required argument");
}
args.fast5_file = state->argv[state->next];
state->next = state->argc;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = { options, parse_arg, args_doc, doc };
static scrappie_seq_t read_sequence_from_fasta(char const * filename){
scrappie_seq_t seq = {0, NULL, NULL};
FILE * fh = fopen(filename, "r");
if(NULL == fh){
return seq;
}
kseq_t * kseqer = kseq_init(fileno(fh));
if(kseq_read(kseqer) >= 0){
char * name = calloc(kseqer->name.l + 1, sizeof(char));
char * base_seq = calloc(kseqer->seq.l, sizeof(char));
if(NULL == base_seq || NULL == name){
free(base_seq);
free(name);
} else {
seq.seq = strncpy(base_seq, kseqer->seq.s, kseqer->seq.l);
seq.name = strncpy(name, kseqer->name.s, kseqer->name.l);
seq.n = kseqer->seq.l;
}
}
kseq_destroy(kseqer);
fclose(fh);
return seq;
}
int main_seqmappy(int argc, char *argv[]) {
argp_parse(&argp, argc, argv, 0, 0, NULL);
if(NULL == args.output){
args.output = stdout;
}
// Open sequence file
scrappie_seq_t seq = read_sequence_from_fasta(args.fasta_file);
if(NULL == seq.seq){
warnx("Failed to open \"%s\" for input.\n", args.fasta_file);
return EXIT_FAILURE;
}
const size_t state_len = 5;
int * states = encode_bases_to_integers(seq.seq, seq.n, state_len);
const size_t nstate = seq.n - state_len + 1;
// Read raw signal and normalise
raw_table rt = read_raw(args.fast5_file, true);
rt = trim_and_segment_raw(rt, args.trim_start, args.trim_end, args.varseg_chunk, args.varseg_thresh);
if(NULL == rt.raw){
warnx("Failed to open \"%s\" for input and trim signal.\n", args.fasta_file);
return EXIT_FAILURE;
}
medmad_normalise_array(rt.raw + rt.start, rt.end - rt.start);
scrappie_matrix logpost = nanonet_rgrgr_r94_posterior(rt, args.min_prob, true);
if(NULL == logpost){
warnx("Failed to calculate posterior for \"%s\" ", args.fasta_file);
return EXIT_SUCCESS;
}
const size_t nblock = logpost->nc;
int * path = calloc(nblock, sizeof(int));
if(NULL != path){
float score = map_to_sequence_viterbi(logpost, args.stay_pen, args.skip_pen, args.local_pen, states, nstate, path);
fprintf(args.output, "# %s to %s -- score %f over %zu blocks (%f per block)\n", args.fast5_file, args.fasta_file, -score, nblock, -score / nblock);
fprintf(args.output, "block\tpos\n");
for(size_t i=0 ; i < nblock ; i++){
const int32_t pos = path[i];
fprintf(args.output, "%zu\t%d\n", i, pos);
}
free(path);
}
free(states);
logpost = free_scrappie_matrix(logpost);
free(seq.seq);
free(seq.name);
return EXIT_SUCCESS;
}