/* get exif data in readable form */
void exif_get_info(ExifData * ed, char *buffer, unsigned int maxsize)
{
ExifEntry *entry = NULL;
char buf[64];
if ( (buffer == NULL) || (maxsize == 0) )
{
return;
}
else if (ed == NULL)
{
snprintf(buffer, (size_t)maxsize, "%s\n", "No Exif data in file.");
return;
}
else if ( ed != NULL )
{
/* normal exif tags */
exif_get_tag(ed, EXIF_IFD_0, EXIF_TAG_MAKE, buffer, maxsize);
exif_get_tag(ed, EXIF_IFD_0, EXIF_TAG_MODEL, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_0, EXIF_TAG_IMAGE_DESCRIPTION, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_DATE_TIME_ORIGINAL, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_DATE_TIME_DIGITIZED, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_TIME, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_SHUTTER_SPEED_VALUE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FNUMBER, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_APERTURE_VALUE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_BIAS_VALUE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_ISO_SPEED_RATINGS, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FOCAL_LENGTH, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_MODE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_PROGRAM, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_SCENE_CAPTURE_TYPE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FLASH, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FLASH_ENERGY, buffer + strlen(buffer), maxsize - strlen(buffer));
/* vendor specific makernote tags */
entry = exif_content_get_entry(ed->ifd[EXIF_IFD_0], EXIF_TAG_MAKE);
if (entry != NULL)
{
if (exif_entry_get_value(entry, buf, sizeof(buf)))
{
exif_trim_spaces(buf);
/* Nikon */
if ( strcmp(buf, "Nikon") != 0 )
{
/* Digital Vari-Program */
exif_get_mnote_tag(ed, 171, buffer + strlen(buffer), maxsize - strlen(buffer));
/* Lens */
exif_get_mnote_tag(ed, 132, buffer + strlen(buffer), maxsize - strlen(buffer));
}
}
}
}
}
/* Show the given MakerNote tag if it exists */
void exif_get_mnote_tag(ExifData *d, unsigned int tag, char* buffer, unsigned int maxsize)
{
ExifMnoteData *mn = NULL;
int i, num;
char buf[1024];
if ( (d!=NULL) && (buffer!=NULL) && (maxsize > 0) )
{
mn = exif_data_get_mnote_data(d);
}
else
{
return;
}
if ( mn != NULL )
{
num = exif_mnote_data_count(mn);
/* Loop through all MakerNote tags, searching for the desired one */
for (i=0; i < num; ++i)
{
D(("%d/%d %d 0x%2x %s; %s\n", i, num, exif_mnote_data_get_id(mn, i),
exif_mnote_data_get_id(mn, i),
exif_mnote_data_get_name(mn,i),
exif_mnote_data_get_title(mn, i) ));
if (exif_mnote_data_get_id(mn, i) == tag)
{
if (exif_mnote_data_get_value(mn, i, buf, sizeof(buf)))
{
/* Don't bother printing it if it's entirely blank */
exif_trim_spaces(buf);
if (*buf != '\0')
{
D(("%s\n", buf));
snprintf(buffer, (size_t)maxsize, "%s: %s\n", exif_mnote_data_get_title(mn, i), buf);
}
}
}
}
}
}
/* show given exif tag content */
static void exif_get_tag(ExifData *d, ExifIfd ifd, ExifTag tag, char* buffer, unsigned int maxsize)
{
char s[MAX_EXIF_DATA];
if ( (d != NULL) && (buffer != NULL) && (maxsize>0) )
{
ExifEntry *entry = exif_content_get_entry(d->ifd[ifd], tag);
if (entry != NULL)
{
/* Get the contents of the tag in human-readable form */
exif_entry_get_value(entry, s, maxsize);
/* Don't bother printing it if it's entirely blank */
exif_trim_spaces(s);
if (*s != '\0')
{
D(("%s: %s\n", exif_tag_get_name_in_ifd(tag,ifd), s));
snprintf(buffer, (size_t)maxsize, "%s: %s\n", exif_tag_get_name_in_ifd(tag,ifd), s);
}
}
}
}
/* get all exif data in readable form */
void exif_get_info(ExifData * ed, char *buffer, unsigned int maxsize)
{
ExifEntry *entry = NULL;
char buf[EXIF_STD_BUF_LEN];
unsigned short int i = 0;
if ( (buffer == NULL) || (maxsize == 0) )
{
return;
}
else if (ed == NULL)
{
snprintf(buffer, (size_t)maxsize, "%s\n", "No Exif data in file.");
return;
}
else
{
/* show normal exif tags. list must be defined in exif_cfg.h */
while ( (Exif_tag_list[i].ifd != EXIF_IFD_COUNT) && (i < USHRT_MAX) )
{
exif_get_tag(ed, Exif_tag_list[i].ifd, Exif_tag_list[i].tag, buffer + strlen(buffer), maxsize - strlen(buffer));
i++;
}
/* show vendor specific makernote tags */
entry = exif_content_get_entry(ed->ifd[EXIF_IFD_0], EXIF_TAG_MAKE);
if (entry != NULL)
{
if (exif_entry_get_value(entry, buf, sizeof(buf)))
{
exif_trim_spaces(buf);
if ( (strcmp(buf, "NIKON CORPORATION") == 0)
|| (strcmp(buf, "Nikon") == 0)
|| (strcmp(buf, "NIKON") == 0)
)
{
/* show nikon makernote exif tags. list must be defined in exif_cfg.h */
i=0;
while ( (Exif_makernote_nikon_tag_list[i] != EXIF_NIKON_MAKERNOTE_END) && (i < USHRT_MAX) )
{
exn_get_mnote_nikon_tags(ed, Exif_makernote_nikon_tag_list[i],
buffer + strlen(buffer), maxsize - strlen(buffer));
i++;
}
}
else if ( (strcmp(buf, "Canon") == 0) )
{
/* show canon makernote exif tags. list must be defined in exif_cfg.h */
i=0;
while ( (Exif_makernote_canon_tag_list[i] != EXIF_CANON_MAKERNOTE_END) && (i < USHRT_MAX) )
{
exc_get_mnote_canon_tags(ed, Exif_makernote_canon_tag_list[i],
buffer + strlen(buffer), maxsize - strlen(buffer));
i++;
}
}
else
{
}
}
}
/* show gps coordinates */
exif_get_gps_coords(ed, buffer + strlen(buffer), maxsize - strlen(buffer));
}
}
