Re: [Libexif-devel] Need some help with adding support for extra canon makernotes

[Jan P. <pa...@pi...>]

Jef,

this message is printed by the CC macro. It checks whether
1st & 2nd arguments are equal. apparently entry->components is 4,
but n is only 1.

Hope this helps..

    -- Jan

> case MNOTE_CANON_TAG_FOCAL_LENGTH:
>     CF (entry->format, EXIF_FORMAT_SHORT, val, maxlen);
>     n = exif_get_short (data, entry->order) / 2;
>     if (t >= n) return NULL;
>     CC (entry->components, n, val, maxlen);
>     vs = exif_get_short (entry->data + 2 + t * 2, entry->order);
>     snprintf (buf, sizeof (buf), "0x%04x", vs);
>     strncpy (val, buf, maxlen - strlen (val));
>     break;
>
> But when I run the exif commandline utility, an error is reported for
> the new tag:
>
> Focal type          |Invalid number of components (4, expected 1).
>
> What am I doing wrong here?
>
> [1] http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Canon.html