handle sidechain input changes

[ardour.git] / libs / ardour / async_midi_port.cc

diff --git a/libs/ardour/async_midi_port.cc b/libs/ardour/async_midi_port.cc
index 3dfb5610d9958153363fb219b0b392d5f88737f7..bbcc0aab85e7e086d9a081e6d062e15df18bda2a 100644 (file)
--- a/libs/ardour/async_midi_port.cc
+++ b/libs/ardour/async_midi_port.cc
@@ -168,7 +168,7 @@ AsyncMIDIPort::cycle_end (MIDI::pframes_t nframes)
  * Cannot be called from a processing thread.
  */
 void
-AsyncMIDIPort::drain (int check_interval_usecs)
+AsyncMIDIPort::drain (int check_interval_usecs, int total_usecs_to_wait)
 {
        RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
 
@@ -183,12 +183,16 @@ AsyncMIDIPort::drain (int check_interval_usecs)
                return;
        }
 
-       while (1) {
+       microseconds_t now = get_microseconds ();
+       microseconds_t end = now + total_usecs_to_wait;
+
+       while (now < end) {
                output_fifo.get_write_vector (&vec);
                if (vec.len[0] + vec.len[1] >= output_fifo.bufsize() - 1) {
                        break;
                }
                Glib::usleep (check_interval_usecs);
+               now = get_microseconds();
        }
 }