/// <summary>
/// Find the open transport in ItemTransports or create a new one.
/// </summary>
/// <param name="guid">GUID of the object.</param>
/// <returns></returns>
static async private Task <int> GetTransport(System.Guid guid)
{
TransportInfo transportInfo;
if (!ItemTransports.TryGetValue(guid, out transportInfo))
{
transportInfo = await CreateTransport(guid);
}
return(transportInfo.TransportID);
}
/// <summary>
/// Send a WAAPI call to create a transport in Wwise.
/// Subscribe to the ak.wwise.core.transport.stateChanged topic of the new transport.
/// Add the transport info to ItemTransports.
/// </summary>
/// <param name="guid">GUID of the Event</param>
/// <returns></returns>
static async private Task <TransportInfo> CreateTransport(System.Guid guid)
{
var args = new ArgsObject(guid.ToString("B"));
var result = await WaapiClient.Call(ak.wwise.core.transport.create, args, null, timeout : 1000);
int transportID = UnityEngine.JsonUtility.FromJson <ReturnTransport>(result).transport;
var options = new TransportOptions(transportID);
uint subscriptionID = await WaapiClient.Subscribe(ak.wwise.core.transport.stateChanged, options, HandleTransportStateChanged);
var transport = new TransportInfo(transportID, subscriptionID);
ItemTransports.Add(guid, transport);
return(transport);
}
/// <summary>
/// Handle the messages published by a transport when its state is changed.
/// If stopped, enqueue a command with DestroyTransport as its payload.
/// </summary>
/// <param name="message"></param>
static private void HandleTransportStateChanged(string message)
{
TransportState transport = UnityEngine.JsonUtility.FromJson <TransportState>(message);
System.Guid itemID = new System.Guid(transport.@object);
int transportID = transport.transport;
if (transport.state == WaapiKeywords.STOPPED)
{
waapiCommandQueue.Enqueue(new WaapiCommand(
async() => await DestroyTransport(itemID)));
}
else if (transport.state == WaapiKeywords.PLAYING && !ItemTransports.ContainsKey(itemID))
{
ItemTransports.Add(itemID, new TransportInfo(transportID, 0));
}
}
/// <summary>
/// Unsubscribe from the transport topic and send a WAAPI command to destroy the transport in Wwise.
/// </summary>
/// <param name="in_itemID"> GUID of the Event.</param>
/// <returns></returns>
static async Task <string> DestroyTransport(System.Guid in_itemID)
{
if (!ItemTransports.ContainsKey(in_itemID))
{
return(null);
}
if (ItemTransports[in_itemID].SubscriptionID != 0)
{
await WaapiClient.Unsubscribe(ItemTransports[in_itemID].SubscriptionID);
}
var args = new ArgsTransport(ItemTransports[in_itemID].TransportID);
var result = await WaapiClient.Call(ak.wwise.core.transport.destroy, args, null);
ItemTransports.Remove(in_itemID);
return(result);
}
