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# slow5lib
## NAME
slow5_rec_depress_parse - Decompresses a record and then parses to a read.
## SYNOPSYS
`int slow5_rec_depress_parse(char **mem, size_t *bytes, const char *read_id, struct slow5_rec **read, struct slow5_file *s5p)`
## DESCRIPTION
This function decompresses a record fetched using `slow5_get_next_mem()`.
Decompresses record if s5p has a compression method and then parses to read.
Sets mem to decompressed mem and bytes to new bytes.
`read` should be freed using `slow5_rec_free()`
## RETURN VALUE
Upon successful completion, `slow5_rec_depress_parse()` returns 0. Otherwise, returns a `SLOW5_ERR_*` and set `slow5_errno` on failure
## NOTES
Does not free `mem` buffer.
## EXAMPLES
```
#include <stdio.h>
#include <stdlib.h>
#include <slow5/slow5.h>
#define FILE_PATH "examples/example.slow5"
#define TO_PICOAMPS(RAW_VAL,DIGITISATION,OFFSET,RANGE) (((RAW_VAL)+(OFFSET))*((RANGE)/(DIGITISATION)))
int main(){
slow5_file_t *sp = slow5_open_with(FILE_PATH,"r",SLOW5_FORMAT_ASCII);
if(sp==NULL){
fprintf(stderr,"Error in opening file\n");
exit(EXIT_FAILURE);
}
slow5_rec_t *rec = NULL;
size_t bytes;
char *mem;
if (!(mem = (char *) slow5_get_next_mem(&bytes, from))) {
return EXIT_FAILURE;
}
if (slow5_rec_depress_parse(&mem, &bytes, NULL, &rec, &from) != 0) {
exit(EXIT_FAILURE);
} else {
free(mem);
}
printf("%s\t",rec->read_id);
uint64_t len_raw_signal = rec->len_raw_signal;
for(uint64_t i=0;i<len_raw_signal;i++){
double pA = TO_PICOAMPS(rec->raw_signal[i],rec->digitisation,rec->offset,rec->range);
printf("%f ",pA);
}
printf("\n");
slow5_rec_free(rec);
slow5_close(sp);
}
```
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