FloatImg4PythonBinding/lib/metadata.c

160 lines
3.9 KiB
C

/*
* metadata.c
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/time.h>
#include <string.h>
#include "../floatimg.h"
extern int verbosity; /* must be declared around main() */
/* ---------------------------------------------------------------- */
static void puts_magic_8(char *ptr, FILE *fp)
{
int foo;
fputs("magic = ", fp);
fputc('[', fp);
for (foo=0; foo<8; foo++) {
fputc(ptr[foo], fp);
}
fputc(']', fp); fputc('\n', fp);
fflush(fp);
}
/* ---------------------------------------------------------------- */
int fimg_show_metadata(FimgMetaData *pmd, char *title, int notused)
{
int foo;
double doubletime;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p '%s' 0x%08x )\n", __func__,
pmd, title, notused);
#endif
if (NULL != title) {
fprintf(stderr, "==== metadate for %s\n", title);
}
if (verbosity) {
fprintf(stderr, "sizeof(metadata) = %ld\n", \
sizeof(FimgMetaData));
puts_magic_8(pmd->magic, stderr);
}
/* SHOW TIMESTAMP HERE */
fprintf(stderr, "seconds sc. epoch = %ld\n", pmd->timestamp.tv_sec);
doubletime = (double)pmd->timestamp.tv_sec + \
(double)pmd->timestamp.tv_usec / 1e6;
fprintf(stderr, "dtime of day = %e\n", doubletime);
fprintf(stderr, "creator pid = %ld\n", pmd->cpid);
fprintf(stderr, "float value = %.3f\n", pmd->fval);
fprintf(stderr, "counter = %d\n", pmd->count);
fprintf(stderr, "id camera = '%s'\n", pmd->idcam);
fprintf(stderr, "origin = 0x%x\n", pmd->origin);
fputs("reserved words are:\n ", stderr);
for (foo=0; foo<8; foo++) {
fprintf(stderr, " 0x%08x", pmd->reserved[foo]);
if (3 == foo) fputs("\n ", stderr);
}
fputc('\n', stderr);
return 0;
}
/* ---------------------------------------------------------------- */
int fimg_default_metadata(FimgMetaData *pmd, int bla)
{
int foo;
struct timeval tvl;
memset(pmd, 0, sizeof(FimgMetaData));
memcpy(pmd->magic, "metadata", 8);
/* set timestamp here ? */
/* CHALLENGE ACCEPTED */
memset(&tvl, 0, sizeof(struct timeval));
foo = gettimeofday(&tvl, NULL);
if (foo) {
/* error on get time of day ? */
perror("omg");
}
else {
if (verbosity) {
fprintf(stderr, " set TimeOfDay to %12ld , %8ld\n", \
tvl.tv_sec, tvl.tv_usec);
}
memcpy(&(pmd->timestamp), &tvl, sizeof(struct timeval));
}
pmd->cpid = getpid(); // we are the creator, no ?
pmd->count = 1; // mmmm...
pmd->fval = 255.0; // Ok
strcpy(pmd->idcam, "<noname>");
pmd->origin = 0xdeadbeef; // classic joke, sorry
pmd->reserved[0] = bla;
pmd->reserved[7] = 0x55445544; // magic number is a crime
return 0;
}
/* ---------------------------------------------------------------- */
int fimg_get_metadata_from_file(char *fname, FimgMetaData *pmd)
{
FILE *fp;
FimgFileHead filehead;
FimgMetaData metadata;
int foo;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( '%s' %p )\n", __func__, fname, pmd);
#endif
if (NULL==(fp=fopen(fname, "r"))) {
perror(fname);
return -1;
}
foo = fread(&filehead, sizeof(FimgFileHead), 1, fp);
if (1 != foo) {
fprintf(stderr, "short read (%d) on %s (head)\n", foo, fname);
fclose(fp);
return -2;
}
if (memcmp(filehead.magic, "FIMG", 4)) {
fprintf(stderr, "'%s' is not a fimg file.\n", fname);
fclose(fp);
return -3;
}
if ('a' != filehead.magic[4]) {
fprintf(stderr, "file '%s' have no metadata.\n", fname);
fclose(fp);
return -4;
}
foo = fread(&metadata, sizeof(FimgMetaData), 1, fp);
if (1 != foo) {
fprintf(stderr, "short read on %s (metadata)\n", fname);
fclose(fp);
return -5;
}
fclose(fp); /* got all needed datas */
if (memcmp(metadata.magic, "metadata", 8)) {
fprintf(stderr, "'%s' invalid metadata\n", fname);
puts_magic_8(metadata.magic, stderr);
return -6;
}
memcpy(pmd, &metadata, sizeof(FimgMetaData));
return 0;
}
/* ---------------------------------------------------------------- */