pictures taken with camera have wrong timestamp

[Bill Filler]

krillin rtm build 46

- phone is set for Eastern time zone (utc -4)
- take a picture with the camera
- apt-get install exiv2 onto the phone
- cd ~/Pictures/com.ubuntu.camera
- exiv2 <imagename>.jpg

Expected results:
Image Timestamp in meta data should match the local time on the phone, with TZ offset applied

Actual results:
Image Timestamp is 6 hours ahead of my timezone

The problem with this is the gallery app uses the timestamps found in the exiv data to display events, so a photos are showing up on the incorrect day

[Ugo Riboni (uriboni)]

The problem is caused by the timezone setting being different at the android layer and at the ubuntu layer. The android layer seems to always use the UTC tz, and that is what it writes in the EXIF tags when it returns the encoded jpeg data to libhybris.

The attached branch fixes the problem by updating the EXIF tags with the correct timestamps in qtubuntu-camera, before saving the image to disk and notifying the apps.

However according to ogra there might be a way to fix this by making sure we set the tz in android too when we set it in ubuntu.
<ogra_> phablet@ubuntu-phablet:~$ sudo lxc-console -t0 -nandroid
<ogra_> root@mako:/ # date
<ogra_> Wed Sep 24 10:51:11 GMT 2014
<ogra_> root@mako:/ # setprop persist.sys.timezone Europe/Berlin
<ogra_> root@mako:/ # date
<ogra_> Wed Sep 24 12:52:15 CEST 2014
<ogra_> seems it uses the same notation
<ogra_> (but to verify 100% one would likely need to check the source of bionic or so )

The tz names in bionic are as follows: https://gist.github.com/arpit/1035596

[Launchpad Janitor (janitor)]

This bug was fixed in the package qtubuntu-camera - 0.3.3+14.10.20141001-0ubuntu1

---------------
qtubuntu-camera (0.3.3+14.10.20141001-0ubuntu1) 14.09; urgency=low

  [ Ubuntu daily release ]
  * New rebuild forced

  [ Ugo Riboni ]
  * Fix EXIF timestamp before saving JPEG, so that timestamps are in
    local times and not in UTC (LP: #1371390)
 -- Ubuntu daily release <email address hidden> Wed, 01 Oct 2014 22:23:52 +0000