Propagate Latency to backend/system ports

[ardour.git] / libs / backends / portaudio / portaudio_backend.cc

diff --git a/libs/backends/portaudio/portaudio_backend.cc b/libs/backends/portaudio/portaudio_backend.cc
index be43e67a6217e2a7f780c8e1643f0adca5a33824..7a65bdcc38d4d363f0318f62f5124158d041ab21 100644 (file)
--- a/libs/backends/portaudio/portaudio_backend.cc
+++ b/libs/backends/portaudio/portaudio_backend.cc
@@ -1500,6 +1500,24 @@ PortAudioBackend::unregister_ports (bool system_only)
        }
 }
 
+void
+PortAudioBackend::update_system_port_latecies ()
+{
+       for (std::vector<PamPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
+               (*it)->update_connected_latency (true);
+       }
+       for (std::vector<PamPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
+               (*it)->update_connected_latency (false);
+       }
+
+       for (std::vector<PamPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
+               (*it)->update_connected_latency (true);
+       }
+       for (std::vector<PamPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
+               (*it)->update_connected_latency (false);
+       }
+}
+
 int
 PortAudioBackend::connect (const std::string& src, const std::string& dst)
 {
@@ -2132,6 +2150,7 @@ PortAudioBackend::process_port_connection_changes ()
                manager.graph_order_callback();
        }
        if (connections_changed || ports_changed) {
+               update_system_port_latecies ();
                engine.latency_callback(false);
                engine.latency_callback(true);
        }
@@ -2322,6 +2341,36 @@ bool PamPort::is_physically_connected () const
        return false;
 }
 
+void
+PamPort::set_latency_range (const LatencyRange &latency_range, bool for_playback)
+{
+       if (for_playback) {
+               _playback_latency_range = latency_range;
+       } else {
+               _capture_latency_range = latency_range;
+       }
+
+       for (std::vector<PamPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
+               if ((*it)->is_physical ()) {
+                       (*it)->update_connected_latency (is_input ());
+               }
+       }
+}
+
+void
+PamPort::update_connected_latency (bool for_playback)
+{
+       LatencyRange lr;
+       lr.min = lr.max = 0;
+       for (std::set<PamPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
+               LatencyRange l;
+               l = (*it)->latency_range (for_playback);
+               lr.min = std::max (lr.min, l.min);
+               lr.max = std::max (lr.max, l.max);
+       }
+       set_latency_range (lr, for_playback);
+}
+
 /******************************************************************************/
 
 PortAudioPort::PortAudioPort (PortAudioBackend &b, const std::string& name, PortFlags flags)