public static async Task <IReadOnlyList <DeviceIdentity> > ListDeviceIdentities(MidiInputDevice input, MidiOutputDevice output, TimeSpan timeout)
{
List <DeviceIdentity> identities = new List <DeviceIdentity>();
using (var client = await RawMidiClient.CreateAsync(input, output, HandleMessage))
{
// Identity request message for all devices IDs.
client.Send(new RawMidiMessage(new byte[] { 0xf0, 0x7e, 0x7f, 0x06, 0x01, 0xf7 }));
await Task.Delay(timeout);
}
return(identities.AsReadOnly());
void HandleMessage(RawMidiMessage message)
{
// TODO: Handle 17-byte messages for "long" manufacturer IDs
var data = message.Data;
if (data.Length == 15 &&
data[0] == 0xf0 && // SysEx
data[1] == 0x7e && // Universal non-realtime message
data[3] == 0x06 && // General information
data[4] == 0x02) // Identity reply
{
byte rawDeviceId = data[2];
var manufacturerId = (ManufacturerId)data[5];
int familyCode = data[6] + (data[7] << 8);
int familyNumberCode = data[8] + (data[9] << 8);
int revision = data[10] + (data[11] << 8) + (data[12] << 16) + (data[13] << 24);
identities.Add(new DeviceIdentity(rawDeviceId, manufacturerId, familyCode, familyNumberCode, revision));
}
}
}
internal static async Task <RolandMidiClient> CreateAsync(MidiInputDevice inputDevice, MidiOutputDevice outputDevice, byte rawDeviceId, int modelId)
{
// This is all a bit nasty... we can't create a RolandMidiClient instance until we have the raw client, and we can't
// create the raw client until we've got a method to call. LocalHandleMessage acts as a sort of trampoline.
// If we could make the constructor asynchronous, it wouldn't be a problem.
RolandMidiClient ret = null;
var rawClient = await RawMidiClient.CreateAsync(inputDevice, outputDevice, LocalHandleMessage);
ret = new RolandMidiClient(rawClient, rawDeviceId, modelId);
return(ret);
void LocalHandleMessage(RawMidiMessage message) => ret?.HandleMessage(message);
}
private RolandMidiClient(RawMidiClient rawClient, byte rawDeviceId, int modelId)
{
this.rawClient = rawClient;
this.rawDeviceId = rawDeviceId;
this.modelId = modelId;
}
private RolandMidiClient(RawMidiClient rawClient, byte rawDeviceId, ModuleIdentifier identifier)
{
this.rawClient = rawClient;
this.rawDeviceId = rawDeviceId;
this.Identifier = identifier;
}