diff options
Diffstat (limited to 'libs/midi++2/midimanager.cc')
| -rw-r--r-- | libs/midi++2/midimanager.cc | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/libs/midi++2/midimanager.cc b/libs/midi++2/midimanager.cc index 8a358c3183..14c9d43793 100644 --- a/libs/midi++2/midimanager.cc +++ b/libs/midi++2/midimanager.cc @@ -70,6 +70,47 @@ Manager::add_port (const XMLNode& node) PortMap::iterator existing; pair<string, Port *> newpair; + /* do not allow multiple ports with the same tag. if attempted, just return the existing + port with the same tag. XXX this is really caused by the mess of setup_midi() being + called twice in Ardour, once in the global init() function and once after the user RC file + has been loaded (there may be extra ports in it). + */ + + if ((existing = ports_by_tag.find (desc.tag)) != ports_by_tag.end()) { + + port = (*existing).second; + + if (port->mode() == desc.mode) { + + /* Same mode - reuse the port, and just + create a new tag entry. + */ + + newpair.first = desc.tag; + newpair.second = port; + + ports_by_tag.insert (newpair); + return port; + } + + /* If the existing is duplex, and this request + is not, then fail, because most drivers won't + allow opening twice with duplex and non-duplex + operation. + */ + + if ((desc.mode == O_RDWR && port->mode() != O_RDWR) || + (desc.mode != O_RDWR && port->mode() == O_RDWR)) { + error << "MIDIManager: port tagged \"" + << desc.tag + << "\" cannot be opened duplex and non-duplex" + << endmsg; + return 0; + } + + /* modes must be different or complementary */ + } + if (!PortFactory::ignore_duplicate_devices (desc.type)) { if ((existing = ports_by_device.find (desc.device)) != ports_by_device.end()) { |