/// <summary>
/// 独立信令 呼叫接口
/// 用于用户新开一个频道并邀请对方加入频道，如果返回码不是200、10201、10202时，sdk会主动关闭频道，标记接口调用失败
/// 该接口为组合接口，等同于用户先创建频道，成功后加入频道并邀请对方
/// </summary>
/// <param name="param">呼叫的传入参数</param>
/// <param name="cb">结果回调见NimSignalingDef.cs</param>
public static void Call(NIMSignalingCallParam param, NimSignalingOptCallHandler cb)
{
NIMSignalingCallParam_C param_c = SignalHelper.GetNativeNIMSignalingCallParam(param);
int nSizeOfParam = Marshal.SizeOf(param_c);
IntPtr param_ptr = Marshal.AllocHGlobal(nSizeOfParam);
try
{
Marshal.StructureToPtr(param_c, param_ptr, false);
var user_ptr = NimUtility.DelegateConverter.ConvertToIntPtr(cb);
SignalingNativeMethods.nim_signaling_call(param_ptr, NimSignalingCallCb, user_ptr);
}
catch (Exception ex)
{
}
finally
{
Marshal.FreeHGlobal(param_ptr);
}
}