async Task <ViscaPacket> IViscaClient.SendAsync(ViscaPacket request, CancellationToken cancellationToken)
{
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
if (request.GetByte(0) != 0x81 || request.Length < 5)
{
return(SyntaxError);
}
return(request.GetByte(1) switch
{
0x01 => await ExecuteCommand(request).ConfigureAwait(false),
0x09 => ExecuteQuery(request),
_ => SyntaxError
});
}
async Task <ViscaPacket> IViscaClient.SendAsync(ViscaPacket request, CancellationToken cancellationToken)
{
bool reconnect = true;
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
await SendPacketAsync(request, cancellationToken).ConfigureAwait(false);
while (true)
{
ViscaPacket response = await ReceivePacketAsync(cancellationToken).ConfigureAwait(false);
if (response.Length < 2)
{
throw new ViscaProtocolException($"Received packet of length {response.Length} from VISCA endpoint");
}
switch (response.GetByte(1) >> 4)
{
// Command received
case 4:
continue;
// Success
case 5:
reconnect = false;
return(response);
// Error reported by device
case 6:
throw new ViscaResponseException($"Error reported by VISCA interface. Error data: {response}");
// VISCA protocol violation
default:
throw new ViscaProtocolException($"Invalid packet returned from VISCA interface. Error data: {response}");
}
}
}
finally
{
try
{
if (reconnect)
{
await ReconnectAsync(cancellationToken).ConfigureAwait(false);
}
}
finally
{
semaphore.Release();
}
}
}
