Make internal sends aware of non-audio data

When most internal sends are created, they are given a panner shell
which is then responsible for audio dispatch. Other data types were left
there without handling them at all. Ensure that all available data is
sent provided the internal send has enough outgoing buffers.

1 files changed, 21 insertions, 0 deletions

diff --git a/libs/ardour/internal_send.cc b/libs/ardour/internal_send.cc
index 0f7d633ba0..6a21e2b5ac 100644
--- a/libs/ardour/internal_send.cc
+++ b/libs/ardour/internal_send.cc
@@ -145,6 +145,27 @@ InternalSend::run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame
 
 	if (_panshell && !_panshell->bypassed() && role() != Listen) {
 		_panshell->run (bufs, mixbufs, start_frame, end_frame, nframes);
+
+		/* non-audio data will not have been copied by the panner, do it now
+		 * if there are more buffers available than send buffers, ignore them,
+		 * if there are less, copy the last as IO::copy_to_output does. */
+
+		for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+			if (*t != DataType::AUDIO) {
+				BufferSet::iterator o = mixbufs.begin(*t);
+				BufferSet::iterator i = bufs.begin(*t);
+
+				while (i != bufs.end(*t) && o != mixbufs.end(*t)) {
+					o->read_from (*i, nframes);
+					++i;
+					++o;
+				}
+				while (o != mixbufs.end(*t)) {
+					o->silence(nframes, 0);
+					++o;
+				}
+			}
+		}
 	} else {
 		if (role() == Listen) {
 			/* We're going to the monitor bus, so discard MIDI data */