split up session code that uses parts of the JACK API (timebase + session event handling) and connect it directly to the jack audiobackend

i've made the audiobackend call the session directly so that only one object (ARDOUR::Session) has a need for the JACK types
and only one .cc file (session_jack.cc) needs jack.h. having ARDOUR::AudioEngine act as an intermediary would be cleaner
conceptually but would end up causing two different ARDOUR objects to have jack types in their own API.

1 files changed, 1 insertions, 11 deletions

diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc
index 45cc33cdc1..2b9a50f1ef 100644
--- a/libs/ardour/audioengine.cc
+++ b/libs/ardour/audioengine.cc
@@ -891,21 +891,11 @@ AudioEngine::thread_init_callback (void* arg)
 	}
 }
 
-/* XXXX
-void
-AudioEngine::timebase_callback (TransportState state, pframes_t nframes, jack_position_t pos, int new_position)
-{
-	if (_session && _session->synced_to_jack()) {
-		// _session->timebase_callback (state, nframes, pos, new_position);
-	}
-}
-*/
-
 int
 AudioEngine::sync_callback (TransportState state, framepos_t position)
 {
 	if (_session) {
-		return _session->jack_sync_callback (state, position);
+		return _session->backend_sync_callback (state, position);
 	}
 	return 0;
 }