+
+void
+Session::goto_end ()
+{
+ if (_session_range_location) {
+ request_locate (_session_range_location->end(), false);
+ } else {
+ request_locate (0, false);
+ }
+}
+
+void
+Session::goto_start ()
+{
+ if (_session_range_location) {
+ request_locate (_session_range_location->start(), false);
+ } else {
+ request_locate (0, false);
+ }
+}
+
+framepos_t
+Session::current_start_frame () const
+{
+ return _session_range_location ? _session_range_location->start() : 0;
+}
+
+framepos_t
+Session::current_end_frame () const
+{
+ return _session_range_location ? _session_range_location->end() : 0;
+}
+
+void
+Session::add_session_range_location (framepos_t start, framepos_t end)
+{
+ _session_range_location = new Location (*this, start, end, _("session"), Location::IsSessionRange);
+ _locations->add (_session_range_location);
+}
+
+/** Called when one of our routes' order keys has changed */
+void
+Session::route_order_key_changed ()
+{
+ RouteOrderKeyChanged (); /* EMIT SIGNAL */
+}
+
+void
+Session::step_edit_status_change (bool yn)
+{
+ bool send = false;
+
+ bool val = false;
+ if (yn) {
+ send = (_step_editors == 0);
+ val = true;
+
+ _step_editors++;
+ } else {
+ send = (_step_editors == 1);
+ val = false;
+
+ if (_step_editors > 0) {
+ _step_editors--;
+ }
+ }
+
+ if (send) {
+ StepEditStatusChange (val);
+ }
+}
+
+
+void
+Session::start_time_changed (framepos_t old)
+{
+ /* Update the auto loop range to match the session range
+ (unless the auto loop range has been changed by the user)
+ */
+
+ Location* s = _locations->session_range_location ();
+ if (s == 0) {
+ return;
+ }
+
+ Location* l = _locations->auto_loop_location ();
+
+ if (l->start() == old) {
+ l->set_start (s->start(), true);
+ }
+}
+
+void
+Session::end_time_changed (framepos_t old)
+{
+ /* Update the auto loop range to match the session range
+ (unless the auto loop range has been changed by the user)
+ */
+
+ Location* s = _locations->session_range_location ();
+ if (s == 0) {
+ return;
+ }
+
+ Location* l = _locations->auto_loop_location ();
+
+ if (l->end() == old) {
+ l->set_end (s->end(), true);
+ }
+}
+
+string
+Session::source_search_path (DataType type) const
+{
+ string search_path;
+
+ if (session_dirs.size() == 1) {
+ switch (type) {
+ case DataType::AUDIO:
+ search_path = _session_dir->sound_path().to_string();
+ break;
+ case DataType::MIDI:
+ search_path = _session_dir->midi_path().to_string();
+ break;
+ }
+ } else {
+ for (vector<space_and_path>::const_iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
+ SessionDirectory sdir (i->path);
+ if (!search_path.empty()) {
+ search_path += ':';
+ }
+ switch (type) {
+ case DataType::AUDIO:
+ search_path += sdir.sound_path().to_string();
+ break;
+ case DataType::MIDI:
+ search_path += sdir.midi_path().to_string();
+ break;
+ }
+ }
+ }
+
+ /* now add user-specified locations
+ */
+
+ vector<string> dirs;
+
+ switch (type) {
+ case DataType::AUDIO:
+ split (config.get_audio_search_path (), dirs, ':');
+ break;
+ case DataType::MIDI:
+ split (config.get_midi_search_path (), dirs, ':');
+ break;
+ }
+
+ for (vector<string>::iterator i = dirs.begin(); i != dirs.end(); ++i) {
+ search_path += ':';
+ search_path += *i;
+
+ }
+
+ return search_path;
+}
+
+void
+Session::ensure_search_path_includes (const string& path, DataType type)
+{
+ string search_path;
+ vector<string> dirs;
+
+ if (path == ".") {
+ return;
+ }
+
+ switch (type) {
+ case DataType::AUDIO:
+ search_path = config.get_audio_search_path ();
+ break;
+ case DataType::MIDI:
+ search_path = config.get_midi_search_path ();
+ break;
+ }
+
+ split (search_path, dirs, ':');
+
+ for (vector<string>::iterator i = dirs.begin(); i != dirs.end(); ++i) {
+ if (*i == path) {
+ return;
+ }
+ }
+
+ if (!search_path.empty()) {
+ search_path += ':';
+ }
+
+ search_path += path;
+
+ switch (type) {
+ case DataType::AUDIO:
+ config.set_audio_search_path (search_path);
+ break;
+ case DataType::MIDI:
+ config.set_midi_search_path (search_path);
+ break;
+ }
+}
+
+boost::shared_ptr<Speakers>
+Session::get_speakers()
+{
+ return _speakers;
+}
+
+list<string>
+Session::unknown_processors () const
+{
+ list<string> p;
+
+ boost::shared_ptr<RouteList> r = routes.reader ();
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ list<string> t = (*i)->unknown_processors ();
+ copy (t.begin(), t.end(), back_inserter (p));
+ }
+
+ p.sort ();
+ p.unique ();
+
+ return p;
+}
+
+void
+Session::update_latency (bool playback)
+{
+ DEBUG_TRACE (DEBUG::Latency, string_compose ("JACK latency callback: %1\n", (playback ? "PLAYBACK" : "CAPTURE")));
+
+ if (_state_of_the_state & (InitialConnecting|Deletion)) {
+ return;
+ }
+
+ boost::shared_ptr<RouteList> r = routes.reader ();
+ framecnt_t max_latency = 0;
+
+ if (playback) {
+ /* reverse the list so that we work backwards from the last route to run to the first */
+ reverse (r->begin(), r->end());
+ }
+
+ /* compute actual latency values for the given direction and store them all in per-port
+ structures. this will also publish the same values (to JACK) so that computation of latency
+ for routes can consistently use public latency values.
+ */
+
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ max_latency = max (max_latency, (*i)->set_private_port_latencies (playback));
+ }
+
+ /* because we latency compensate playback, our published playback latencies should
+ be the same for all output ports - all material played back by ardour has
+ the same latency, whether its caused by plugins or by latency compensation. since
+ these may differ from the values computed above, reset all playback port latencies
+ to the same value.
+ */
+
+ DEBUG_TRACE (DEBUG::Latency, string_compose ("Set public port latencies to %1\n", max_latency));
+
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ (*i)->set_public_port_latencies (max_latency, playback);
+ }
+
+ if (playback) {
+
+ post_playback_latency ();
+
+ } else {
+
+ post_capture_latency ();
+ }
+
+ DEBUG_TRACE (DEBUG::Latency, "JACK latency callback: DONE\n");
+}
+
+void
+Session::post_playback_latency ()
+{
+ set_worst_playback_latency ();
+
+ boost::shared_ptr<RouteList> r = routes.reader ();
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ if (!(*i)->is_hidden() && ((*i)->active())) {
+ _worst_track_latency = max (_worst_track_latency, (*i)->update_signal_latency ());
+ }
+
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ (*i)->set_latency_compensation (_worst_track_latency);
+ }
+ }
+}
+
+void
+Session::post_capture_latency ()
+{
+ set_worst_capture_latency ();
+
+ /* reflect any changes in capture latencies into capture offsets
+ */
+
+ boost::shared_ptr<RouteList> rl = routes.reader();
+ for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
+ boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
+ if (tr) {
+ tr->set_capture_offset ();
+ }
+ }
+}
+
+void
+Session::set_worst_io_latencies ()
+{
+ set_worst_playback_latency ();
+ set_worst_capture_latency ();
+}
+
+void
+Session::set_worst_playback_latency ()
+{
+ if (_state_of_the_state & (InitialConnecting|Deletion)) {
+ return;
+ }
+
+ _worst_output_latency = 0;
+
+ if (!_engine.connected()) {
+ return;
+ }
+
+ boost::shared_ptr<RouteList> r = routes.reader ();
+
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ _worst_output_latency = max (_worst_output_latency, (*i)->output()->latency());
+ }
+
+ DEBUG_TRACE (DEBUG::Latency, string_compose ("Worst output latency: %1\n", _worst_output_latency));
+}
+
+void
+Session::set_worst_capture_latency ()
+{
+ if (_state_of_the_state & (InitialConnecting|Deletion)) {
+ return;
+ }
+
+ _worst_input_latency = 0;
+
+ if (!_engine.connected()) {
+ return;
+ }
+
+ boost::shared_ptr<RouteList> r = routes.reader ();
+
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ _worst_input_latency = max (_worst_input_latency, (*i)->input()->latency());
+ }
+
+ DEBUG_TRACE (DEBUG::Latency, string_compose ("Worst input latency: %1\n", _worst_input_latency));
+}
+
+void
+Session::update_latency_compensation (bool force_whole_graph)
+{
+ bool some_track_latency_changed = false;
+
+ if (_state_of_the_state & (InitialConnecting|Deletion)) {
+ return;
+ }
+
+ DEBUG_TRACE(DEBUG::Latency, "---------------------------- update latency compensation\n\n");
+
+ _worst_track_latency = 0;
+
+ boost::shared_ptr<RouteList> r = routes.reader ();
+
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ if (!(*i)->is_hidden() && ((*i)->active())) {
+ framecnt_t tl;
+ if ((*i)->signal_latency () != (tl = (*i)->update_signal_latency ())) {
+ some_track_latency_changed = true;
+ }
+ _worst_track_latency = max (tl, _worst_track_latency);
+ }
+ }
+
+ DEBUG_TRACE (DEBUG::Latency, string_compose ("worst signal processing latency: %1 (changed ? %2)\n", _worst_track_latency,
+ (some_track_latency_changed ? "yes" : "no")));
+
+ if (force_whole_graph || some_track_latency_changed) {
+ /* trigger a full recompute of latency numbers for the graph.
+ everything else that we need to do will be done in the latency
+ callback.
+ */
+ _engine.update_total_latencies ();
+ return; // everything else will be done in the latency callback
+ }
+
+ DEBUG_TRACE(DEBUG::Latency, "---------------------------- DONE update latency compensation\n\n")
+}
+