/// <summary>
/// Discover new onvif devices on the network passing a callback
/// to retrieve devices as they reply
/// </summary>
/// <param name="timeout">A timeout in seconds to wait for onvif devices</param>
/// <param name="onDeviceDiscovered">A method that is called each time a new device replies.</param>
/// <param name="cancellationToken">A cancellation token</param>
/// <returns>The Task to be awaited</returns>
public async Task Discover(int timeout, Action <DiscoveryDevice> onDeviceDiscovered,
CancellationToken cancellationToken = default)
{
var clients = clientFactory.CreateClientForeachInterface();
if (!clients.Any())
{
throw new DiscoveryException("Missing valid NetworkInterfaces, UdpClients could not be created");
}
var discoveries = clients.Select(client => Discover(timeout, client, onDeviceDiscovered, cancellationToken)).ToArray();
await Task.WhenAll(discoveries);
}
/// <summary>
/// Discover new onvif devices on the network
/// </summary>
/// <param name="timeout">A timeout in seconds to wait for onvif devices</param>
/// <param name="cancellationToken">A cancellation token</param>
/// <returns>a list of <see cref="DiscoveryDevice"/></returns>
public async Task <IEnumerable <DiscoveryDevice> > Discover(int timeout, CancellationToken cancellationToken = default)
{
var devices = new List <DiscoveryDevice> ();
List <Task <IEnumerable <DiscoveryDevice> > > discoveries = new List <Task <IEnumerable <DiscoveryDevice> > > ();
var clients = clientFactory.CreateClientForeachInterface();
if (!clients.Any())
{
throw new DiscoveryException("Missing valid NetworkInterfaces, UdpClients could not be created");
}
foreach (var client in clients)
{
discoveries.Add(Discover(timeout, client, cancellationToken));
}
var discoverResults = await Task.WhenAll(discoveries);
foreach (var results in discoverResults)
{
devices.AddRange(results);
}
return(devices);
}
