-arestore jack timebase master and jack session callback functionality (moved into the JACK backend)

2 files changed, 240 insertions, 0 deletions

diff --git a/libs/backends/jack/jack_session.cc b/libs/backends/jack/jack_session.cc
new file mode 100644
index 0000000000..ca51dafccc
--- /dev/null
+++ b/libs/backends/jack/jack_session.cc
@@ -0,0 +1,193 @@
+/*
+  Copyright (C) 2013 Paul Davis
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+
+#include <time.h>
+
+#include <glibmm/miscutils.h>
+
+#include <jack/jack.h>
+
+#include "ardour/audioengine.h"
+#include "ardour/filename_extensions.h"
+#include "ardour/session.h"
+#include "ardour/session_directory.h"
+#include "ardour/tempo.h"
+
+#include "jack_session.h"
+
+using namespace ARDOUR;
+using std::string;
+
+JACKSession::JACKSession (Session* s)
+	: SessionHandlePtr (s)
+{
+}
+
+JACKSession::~JACKSession ()
+{
+}
+
+void
+JACKSession::session_event (jack_session_event_t* event)
+{
+        char timebuf[128], *tmp;
+        time_t n;
+        struct tm local_time;
+
+        time (&n);
+        localtime_r (&n, &local_time);
+        strftime (timebuf, sizeof(timebuf), "JS_%FT%T", &local_time);
+
+        while ((tmp = strchr(timebuf, ':'))) { *tmp = '.'; }
+
+        if (event->type == JackSessionSaveTemplate)
+        {
+                if (_session->save_template( timebuf )) {
+                        event->flags = JackSessionSaveError;
+                } else {
+                        string cmd ("ardour3 -P -U ");
+                        cmd += event->client_uuid;
+                        cmd += " -T ";
+                        cmd += timebuf;
+
+                        event->command_line = strdup (cmd.c_str());
+                }
+        }
+        else
+        {
+                if (_session->save_state (timebuf)) {
+                        event->flags = JackSessionSaveError;
+                } else {
+			std::string xml_path (_session->session_directory().root_path());
+			std::string legalized_filename = legalize_for_path (timebuf) + statefile_suffix;
+			xml_path = Glib::build_filename (xml_path, legalized_filename);
+
+                        string cmd ("ardour3 -P -U ");
+                        cmd += event->client_uuid;
+                        cmd += " \"";
+                        cmd += xml_path;
+                        cmd += '\"';
+
+                        event->command_line = strdup (cmd.c_str());
+                }
+        }
+
+	/* this won't be called if the port engine in use is not JACK, so we do 
+	   not have to worry about the type of PortEngine::private_handle()
+	*/
+
+	jack_client_t* jack_client = (jack_client_t*) AudioEngine::instance()->port_engine().private_handle();
+	
+	if (jack_client) {
+		jack_session_reply (jack_client, event);
+	}
+
+	if (event->type == JackSessionSaveAndQuit) {
+		_session->Quit (); /* EMIT SIGNAL */
+	}
+
+	jack_session_event_free (event);
+}
+
+void
+JACKSession::timebase_callback (jack_transport_state_t /*state*/,
+				 pframes_t /*nframes*/,
+				 jack_position_t* pos,
+				 int /*new_position*/)
+{
+	Timecode::BBT_Time bbt;
+	TempoMap& tempo_map (_session->tempo_map());
+	framepos_t tf = _session->transport_frame ();
+
+	/* BBT info */
+
+	TempoMetric metric (tempo_map.metric_at (tf));
+	
+	try {
+		tempo_map.bbt_time_rt (tf, bbt);
+		
+		pos->bar = bbt.bars;
+		pos->beat = bbt.beats;
+		pos->tick = bbt.ticks;
+		
+		// XXX still need to set bar_start_tick
+		
+		pos->beats_per_bar = metric.meter().divisions_per_bar();
+		pos->beat_type = metric.meter().note_divisor();
+		pos->ticks_per_beat = Timecode::BBT_Time::ticks_per_beat;
+		pos->beats_per_minute = metric.tempo().beats_per_minute();
+		
+		pos->valid = jack_position_bits_t (pos->valid | JackPositionBBT);
+		
+	} catch (...) {
+		/* no message */
+	}
+
+#ifdef HAVE_JACK_VIDEO_SUPPORT
+	//poke audio video ratio so Ardour can track Video Sync
+	pos->audio_frames_per_video_frame = _session->frame_rate() / _session->timecode_frames_per_second();
+	pos->valid = jack_position_bits_t (pos->valid | JackAudioVideoRatio);
+#endif
+
+#ifdef HAVE_JACK_TIMCODE_SUPPORT
+	/* This is not yet defined in JACK */
+
+	/* Timecode info */
+
+	pos->timecode_offset = _session->config.get_timecode_offset();
+	t.timecode_frame_rate = _session->timecode_frames_per_second();
+	pos->valid = jack_position_bits_t (pos->valid | JackPositionTimecode);
+#endif
+
+#ifdef HAVE_JACK_LOOPING_SUPPORT
+	/* This is not yet defined in JACK */
+	if (_transport_speed) {
+
+		if (play_loop) {
+
+			Location* location = _session->locations()->auto_loop_location();
+
+			if (location) {
+
+				t.transport_state = JackTransportLooping;
+				t.loop_start = location->start();
+				t.loop_end = location->end();
+				t.valid = jack_transport_bits_t (t.valid | JackTransportLoop);
+
+			} else {
+
+				t.loop_start = 0;
+				t.loop_end = 0;
+				t.transport_state = JackTransportRolling;
+
+			}
+
+		} else {
+
+			t.loop_start = 0;
+			t.loop_end = 0;
+			t.transport_state = JackTransportRolling;
+
+		}
+
+	}
+#endif
+}
+
diff --git a/libs/backends/jack/jack_session.h b/libs/backends/jack/jack_session.h
new file mode 100644
index 0000000000..c912b5f170
--- /dev/null
+++ b/libs/backends/jack/jack_session.h
@@ -0,0 +1,47 @@
+/*
+  Copyright (C) 2013 Paul Davis
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __ardour_jack_audiobackend_jack_session_h__
+#define __ardour_jack_audiobackend_jack_session_h__
+
+#include <jack/session.h>
+#include <jack/transport.h>
+
+#include "ardour/types.h"
+#include "ardour/session_handle.h"
+
+namespace ARDOUR {
+	class Session;
+
+class JACKSession : public ARDOUR::SessionHandlePtr
+{
+  public:
+    JACKSession (ARDOUR::Session* s);
+    ~JACKSession ();
+    
+    void session_event (jack_session_event_t* event);
+    void timebase_callback (jack_transport_state_t /*state*/,
+			    ARDOUR::pframes_t /*nframes*/,
+			    jack_position_t* pos,
+			    int /*new_position*/);
+};
+
+} /* namespace */
+
+#endif /* __ardour_jack_audiobackend_jack_session_h__ */