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* rename namespace from ring to jami
* rename logs methods from RING_* to JAMI_*
* rename RING_VIDEO to ENABLE_VIDEO

Change-Id: Ic98498652d7059fafe58a96220d565bcdfa53658

Change-Id: I0b760e4ae32ab372cef49ef9c2120e722e041ef1

Change-Id: Ia4ed75d04a284efa0763c917aeaa2f08863a87cb

Change-Id: I17acc6e9d3c8c0db3978d09b2d3606c7d7b28904

Adds flushing capability to filters.

Change-Id: I015d7931318deb5d099fcaac1356f5fc17b890d6

Lets filters output frames when ready and requested, else there may be a
null frame dereference deep in the filtering pipeline.

Change-Id: I4f7386837d06d003041a2c73d33811f3cb78c3f0

If one of the inputs has changed, the filter will reinitialize itself.

Change-Id: I884195b6fdf19ad72329364eeeefd33e3b3bbfff

Change-Id: Ie45773677290111f92b81230071835ac42e7197e
Reviewed-by: Philippe Gorley <philippe.gorley@savoirfairelinux.com>

Adds a way to get input parameters.
Simplifies usage of simple filters.
Adds const where useful.

Change-Id: I768d2f3e4e46e791e10530a1c3010607fecc42da

Better scopes mutices, adds multithreading to MediaFilter, improves
multithreading for MediaRecorder, decreases lag between both video feeds
while recording.

Change-Id: I9f96c1e90d506a8dc4a261a7e07010d42e5bf3ec

Change-Id: I6f1ebfc9d967452fe7d7c7e72e32cf795ae2d85a
Reviewed-by: Sebastien Blin <sebastien.blin@savoirfairelinux.com>

Filters were reverted for the release so the binaries wouldn't include
libavfilter (which wasn't yet used).

This reverts commit 1e6a4716.

Change-Id: Ib9790a544b442066265b3fe1ea96313be35eff62
Reviewed-by: Sebastien Blin <sebastien.blin@savoirfairelinux.com>

This reverts commit ea2933d4.

Change-Id: I624c07255f60186a0d1e6610a58956775f91b342

Adds dependency to libavfilter, which provides many useful utilities
such as hardware encoding, mixing audio or rotating video.

Access to libavfilter is done through the MediaFilter class, which takes
a filter graph string and AVFrames as input and outputs filtered
AVFrames.

Adds unit tests for MediaFilter.

Change-Id: I0bf3869a9f19ad9cbbe1fc5e2d37eb83ece66ccc
Reviewed-by: Sebastien Blin <sebastien.blin@savoirfairelinux.com>