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metadata: fix conversion of geo coordinates

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Coordinate conversion has been verified with exiv2 and some webpages.
Minutes wher totally off and seconds were not used at all.
This commit is contained in:
Stefan Kost 2009-06-10 11:15:01 +03:00
parent 1cf9f2d497
commit f096d6406e
1 changed files with 17 additions and 10 deletions
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25
ext/metadata/metadataexif.c
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@ -694,16 +694,16 @@ metadataparse_exif_content_foreach_entry_func (ExifEntry * entry,
/* DDD - degrees */
value = (gdouble) rt->numerator / (gdouble) rt->denominator;
GST_DEBUG ("deg: %lu / %lu", rt->numerator, rt->denominator);
rt++;
/* MM - minutes and SS - seconds */
if (rt->numerator % rt->denominator) {
value += (gdouble) rt->numerator / (gdouble) rt->denominator;
} else {
value += rt->numerator / rt->denominator;
GST_DEBUG ("min: %lu / %lu", rt->numerator, rt->denominator);
value += (gdouble) rt->numerator / ((gdouble) rt->denominator * 60.0);
rt++;
value += rt->numerator / rt->denominator;
}
GST_DEBUG ("sec: %lu / %lu", rt->numerator, rt->denominator);
value +=
(gdouble) rt->numerator / ((gdouble) rt->denominator * 3600.0);
/* apply sign */
if (entry->tag == EXIF_TAG_GPS_LATITUDE) {
@ -1049,17 +1049,24 @@ metadatamux_exif_for_each_tag_in_list (const GstTagList * list,
const ExifTag ref_tag = entry->tag == EXIF_TAG_GPS_LATITUDE ?
EXIF_TAG_GPS_LATITUDE_REF : EXIF_TAG_GPS_LONGITUDE_REF;
/* DDD - degrees */
rt->numerator = (gulong) v;
rt->denominator = 1;
GST_DEBUG ("deg: %lf : %lu / %lu", v, rt->numerator, rt->denominator);
v -= rt->numerator;
rt++;
rt->numerator = (gulong) (0.5 + v * 100.0);
rt->denominator = 100;
/* MM - minutes */
rt->numerator = (gulong) (v * 60.0);
rt->denominator = 1;
GST_DEBUG ("min: %lf : %lu / %lu", v, rt->numerator, rt->denominator);
v -= ((gdouble) rt->numerator / 60.0);
rt++;
rt->numerator = 0;
/* SS - seconds */
rt->numerator = (gulong) (0.5 + v * 3600.0);
rt->denominator = 1;
GST_DEBUG ("sec: %lf : %lu / %lu", v, rt->numerator, rt->denominator);
if (entry->tag == EXIF_TAG_GPS_LONGITUDE) {
GST_DEBUG ("longitude : %lf", value);