public void InterruptInput()
{
bool passed = false, aborted = false;
var evt = new AlsaSequencerEvent();
AlsaSequencer seq = null;
int appPort = -1;
var waitStart = new ManualResetEvent(false);
using (seq = new AlsaSequencer(AlsaIOType.Input, AlsaIOMode.None)) {
appPort = seq.CreateSimplePort("alsa-sharp-test-input", AlsaPortCapabilities.Write | AlsaPortCapabilities.NoExport, AlsaPortType.Application | AlsaPortType.MidiGeneric);
var cinfo = new AlsaClientInfo {
Client = -1
};
int client = -1;
while (seq.QueryNextClient(cinfo))
{
if (cinfo.Name.Contains("Midi Through"))
{
client = cinfo.Client;
}
}
if (client < 0)
{
Console.Error.WriteLine("Midi Through not found. Not testable.");
return; // not testable
}
seq.ConnectFrom(appPort, client, 0);
try {
seq.ResetPoolInput();
var task = Task.Run(() => {
waitStart.Set();
try {
seq.Input(evt, appPort);
passed = true;
} catch (Exception ex) {
passed = false;
aborted = true;
Console.Error.WriteLine("Input threw an error: " + ex);
}
});
waitStart.WaitOne();
// it will cause ALSA error as it's waiting for input in blocking mode.
seq.DisconnectFrom(appPort, client, 0);
task.Wait(50);
Assert.IsFalse(passed, "input should keep listening");
seq.DeleteSimplePort(appPort);
task.Wait(50);
seq.Dispose();
seq = null;
task.Wait(50);
} finally {
if (seq != null)
{
seq.Dispose();
}
}
// It doesn't even run exception part...
Assert.IsFalse(aborted, "We expect it not to abort...");
}
}
public void InputToObserveSystemAnnoucements()
{
bool passed = false;
var evt = new AlsaSequencerEvent();
AlsaSequencer inseq = null;
int appPort = -1;
Task task = new TaskFactory().StartNew(() => {
using (inseq = new AlsaSequencer(AlsaIOType.Input, AlsaIOMode.None)) {
appPort = inseq.CreateSimplePort("alsa-sharp-test-input", AlsaPortCapabilities.Write | AlsaPortCapabilities.NoExport, AlsaPortType.Application | AlsaPortType.MidiGeneric);
inseq.ConnectFrom(appPort, AlsaSequencer.ClientSystem, AlsaPortInfo.PortSystemAnnouncement);
try {
inseq.ResetPoolInput();
// ClientStart, PortStart, PortSubscribed, PortUnsubscribed, PortExit
inseq.Input(evt, appPort);
Assert.AreEqual(AlsaSequencerEventType.ClientStart, evt.EventType, "evt1");
inseq.Input(evt, appPort);
Assert.AreEqual(AlsaSequencerEventType.PortStart, evt.EventType, "evt2");
inseq.Input(evt, appPort);
Assert.AreEqual(AlsaSequencerEventType.PortSubscribed, evt.EventType, "evt3");
passed = true;
} finally {
inseq.DisconnectFrom(appPort, AlsaSequencer.ClientSystem, AlsaPortInfo.PortSystemAnnouncement);
appPort = -1;
}
}
});
Thread.Sleep(50); // give some time for announcement client to start.
// create another port, which is a dummy and just subscribes to notify the system to raise an announcement event.
var cinfo = new AlsaClientInfo {
Client = -1
};
int lastClient = -1;
var outseq = new AlsaSequencer(AlsaIOType.Input, AlsaIOMode.NonBlocking);
while (outseq.QueryNextClient(cinfo))
{
if (cinfo.Name.Contains("Midi Through"))
{
lastClient = cinfo.Client;
}
}
if (lastClient < 0)
{
Console.Error.WriteLine("Midi Through not found. Not testable.");
return; // not testable
}
int targetPort = 0;
int testPort = outseq.CreateSimplePort("alsa-sharp-test-output", AlsaPortCapabilities.Write | AlsaPortCapabilities.NoExport, AlsaPortType.Application | AlsaPortType.MidiGeneric);
try {
outseq.ConnectTo(testPort, lastClient, targetPort);
outseq.DisconnectTo(testPort, lastClient, targetPort);
Thread.Sleep(50); // give some time for announcement client to finish.
Assert.IsTrue(passed, "failed to receive an announcement");
} finally {
outseq.DeleteSimplePort(testPort);
}
}