// [input device port] --> [RETURNED PORT] --> app handles messages
AlsaPortInfo CreateInputConnectedPort(AlsaSequencer seq, AlsaPortInfo pinfo, string portName = "alsa-sharp input")
{
var portId = seq.CreateSimplePort(portName, input_connected_cap, midi_port_type);
var sub = new AlsaPortSubscription();
sub.Destination.Client = (byte)seq.CurrentClientId;
sub.Destination.Port = (byte)portId;
sub.Sender.Client = (byte)pinfo.Client;
sub.Sender.Port = (byte)pinfo.Port;
seq.SubscribePort(sub);
return(seq.GetPort(sub.Destination.Client, sub.Destination.Port));
}
// app generates messages --> [RETURNED PORT] --> [output device port]
AlsaPortInfo CreateOutputConnectedPort(AlsaPortInfo pinfo, string portName = "alsa-sharp output")
{
var portId = output.CreateSimplePort(portName, output_connected_cap, midi_port_type);
var sub = new AlsaPortSubscription();
sub.Sender.Client = (byte)output_client_id;
sub.Sender.Port = (byte)portId;
sub.Destination.Client = (byte)pinfo.Client;
sub.Destination.Port = (byte)pinfo.Port;
output.SubscribePort(sub);
return(output.GetPort(sub.Sender.Client, sub.Sender.Port));
}
public void SubscribeUnsubscribePort()
{
using (var seq = new AlsaSequencer(AlsaIOType.Input, AlsaIOMode.NonBlocking)) {
var subs = new AlsaPortSubscription();
subs.Sender.Client = AlsaSequencer.ClientSystem;
subs.Sender.Port = AlsaPortInfo.PortSystemAnnouncement;
subs.Destination.Client = (byte)seq.CurrentClientId;
subs.Destination.Port = (byte)seq.CreateSimplePort("test in port", AlsaPortCapabilities.SubsRead | AlsaPortCapabilities.Read, AlsaPortType.MidiGeneric | AlsaPortType.Application);
try {
seq.SubscribePort(subs);
foreach (var ppi in subs.GetType().GetProperties())
{
TextWriter.Null.WriteLine($" [{ppi}]\t{ppi.GetValue (subs)}");
}
seq.UnsubscribePort(subs);
} finally {
seq.DeleteSimplePort(subs.Destination.Port);
}
}
}
