, _target_transport_speed (0.0)
, auto_play_legal (false)
, _last_slave_transport_sample (0)
- , maximum_output_latency (0)
, _requested_return_sample (-1)
, current_block_size (0)
, _worst_output_latency (0)
, _worst_input_latency (0)
- , _worst_track_latency (0)
- , _worst_track_out_latency (0)
+ , _worst_route_latency (0)
+ , _send_latency_changes (0)
, _have_captured (false)
, _non_soloed_outs_muted (false)
, _listening (false)
StartTimeChanged.connect_same_thread (*this, boost::bind (&Session::start_time_changed, this, _1));
EndTimeChanged.connect_same_thread (*this, boost::bind (&Session::end_time_changed, this, _1));
+ Send::ChangedLatency.connect_same_thread (*this, boost::bind (&Session::send_latency_compensation_change, this));
+
emit_thread_start ();
auto_connect_thread_start ();
resort_routes ();
/* force all diskstreams to update their capture offset values to
- reflect any changes in latencies within the graph.
- */
-
- boost::shared_ptr<RouteList> rl = routes.reader ();
- for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
- (*i)->update_signal_latency (true); // XXX
- }
+ * reflect any changes in latencies within the graph.
+ */
+ update_route_latency (false, true);
}
/** @return Number of samples that there is disk space available to write,
}
void
-Session::update_latency (bool playback)
+Session::set_worst_io_latencies_x (IOChange, void *)
{
+ set_worst_io_latencies ();
+}
+void
+Session::send_latency_compensation_change ()
+{
+ /* As a result of Send::set_output_latency()
+ * or InternalReturn::set_playback_offset ()
+ * the send's own latency can change (source track
+ * is aligned with target bus).
+ *
+ * This can only happen be triggered by
+ * Route::update_signal_latency ()
+ * when updating the processor latency.
+ *
+ * We need to walk the graph again to take those changes into account
+ * (we should probably recurse or process the graph in a 2 step process).
+ */
+ ++_send_latency_changes;
+}
+
+bool
+Session::update_route_latency (bool playback, bool apply_to_delayline)
+{
+ /* Note: RouteList is process-graph sorted */
+ boost::shared_ptr<RouteList> r = routes.reader ();
+
+ if (playback) {
+ /* reverse the list so that we work backwards from the last route to run to the first,
+ * this is not needed, but can help to reduce the iterations for aux-sends.
+ */
+ RouteList* rl = routes.reader().get();
+ r.reset (new RouteList (*rl));
+ reverse (r->begin(), r->end());
+ }
+
+ bool changed = false;
+ int bailout = 0;
+restart:
+ _send_latency_changes = 0;
+ _worst_route_latency = 0;
+
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ // if (!(*i)->active()) { continue ; } // TODO
+ samplecnt_t l;
+ if ((*i)->signal_latency () != (l = (*i)->update_signal_latency (apply_to_delayline))) {
+ changed = true;
+ }
+ _worst_route_latency = std::max (l, _worst_route_latency);
+ }
+
+ if (_send_latency_changes > 0) {
+ // only 1 extra iteration is needed (we allow only 1 level of aux-sends)
+ // BUT.. jack'n'sends'n'bugs
+ if (++bailout < 5) {
+ cerr << "restarting Session::update_latency. # of send changes: " << _send_latency_changes << " iteration: " << bailout << endl;
+ goto restart;
+ }
+ }
+
+ DEBUG_TRACE (DEBUG::Latency, string_compose ("worst signal processing latency: %1 (changed ? %2)\n", _worst_route_latency, (changed ? "yes" : "no")));
+
+ return changed;
+}
+
+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)) || _adding_routes_in_progress || _route_deletion_in_progress) {
}
if (playback) {
- post_playback_latency ();
+ set_worst_output_latency ();
+ update_route_latency (true, true);
} else {
- post_capture_latency ();
+ set_worst_input_latency ();
+ update_route_latency (false, false);
}
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 ();
-
- _worst_track_out_latency = 0; // XXX remove me
-
- for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
- assert (!(*i)->is_auditioner()); // XXX remove me
- _worst_track_latency = max (_worst_track_latency, (*i)->update_signal_latency ());
- }
-
- for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
- if (!(*i)->active()) { continue ; }
- (*i)->apply_latency_compensation ();
- }
-}
-
-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) {
- (*i)->update_signal_latency ();
- }
-}
-
void
Session::initialize_latencies ()
{
void
Session::set_worst_io_latencies ()
{
- set_worst_playback_latency ();
- set_worst_capture_latency ();
+ set_worst_output_latency ();
+ set_worst_input_latency ();
}
void
-Session::set_worst_playback_latency ()
+Session::set_worst_output_latency ()
{
if (_state_of_the_state & (InitialConnecting|Deletion)) {
return;
}
void
-Session::set_worst_capture_latency ()
+Session::set_worst_input_latency ()
{
if (_state_of_the_state & (InitialConnecting|Deletion)) {
return;
boost::shared_ptr<RouteList> r = routes.reader ();
for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
- boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
- if (!tr) {
- continue;
- }
_worst_input_latency = max (_worst_input_latency, (*i)->input()->latency());
}
- DEBUG_TRACE (DEBUG::Latency, string_compose ("Worst input latency: %1\n", _worst_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)
{
- // TODO: consolidate
- 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) {
- assert (!(*i)->is_auditioner()); // XXX remove me
- if ((*i)->active()) {
- samplecnt_t tl;
- if ((*i)->signal_latency () != (tl = (*i)->update_signal_latency () /* - (*i)->output()->user_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")));
-
- DEBUG_TRACE(DEBUG::Latency, "---------------------------- DONE update latency compensation\n\n");
+ bool some_track_latency_changed = update_route_latency (false, false);
if (some_track_latency_changed || force_whole_graph) {
_engine.update_latencies ();
- }
-
- for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
- (*i)->update_signal_latency (true);
+ /* above call will ask the backend up update its latencies, which
+ * eventually will trigger AudioEngine::latency_callback () and
+ * call Session::update_latency ()
+ */
+ } else {
+ boost::shared_ptr<RouteList> r = routes.reader ();
+ for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+ (*i)->apply_latency_compensation ();
+ }
}
}
projects / ardour.git / blobdiff