jellyfin/MediaBrowser.Server.Implementations/LiveTv/TunerHosts/SatIp/Utils.cs
2016-09-01 21:54:16 -04:00

91 lines
3.5 KiB
C#

/*
Copyright (C) <2007-2016> <Kay Diefenthal>
SatIp.RtspSample is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SatIp.RtspSample is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with SatIp.RtspSample. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Text;
namespace MediaBrowser.Server.Implementations.LiveTv.TunerHosts.SatIp
{
public class Utils
{
public static int Convert2BytesToInt(byte[] buffer, int offset)
{
int temp = (int)buffer[offset];
temp = (temp * 256) + buffer[offset + 1];
return (temp);
}
public static int Convert3BytesToInt(byte[] buffer, int offset)
{
int temp = (int)buffer[offset];
temp = (temp * 256) + buffer[offset + 1];
temp = (temp * 256) + buffer[offset + 2];
return (temp);
}
public static int Convert4BytesToInt(byte[] buffer, int offset)
{
int temp =(int)buffer[offset];
temp = (temp * 256) + buffer[offset + 1];
temp = (temp * 256) + buffer[offset + 2];
temp = (temp * 256) + buffer[offset + 3];
return (temp);
}
public static long Convert4BytesToLong(byte[] buffer, int offset)
{
long temp = 0;
for (int index = 0; index < 4; index++)
temp = (temp * 256) + buffer[offset + index];
return (temp);
}
public static long Convert8BytesToLong(byte[] buffer, int offset)
{
long temp = 0;
for (int index = 0; index < 8; index++)
temp = (temp * 256) + buffer[offset + index];
return (temp);
}
public static string ConvertBytesToString(byte[] buffer, int offset, int length)
{
StringBuilder reply = new StringBuilder(4);
for (int index = 0; index < length; index++)
reply.Append((char)buffer[offset + index]);
return (reply.ToString());
}
public static DateTime NptTimestampToDateTime(long nptTimestamp) { return NptTimestampToDateTime((uint)((nptTimestamp >> 32) & 0xFFFFFFFF), (uint)(nptTimestamp & 0xFFFFFFFF),null); }
public static DateTime NptTimestampToDateTime(uint seconds, uint fractions, DateTime? epoch )
{
ulong ticks =(ulong)((seconds * TimeSpan.TicksPerSecond) + ((fractions * TimeSpan.TicksPerSecond) / 0x100000000L));
if (epoch.HasValue) return epoch.Value + TimeSpan.FromTicks((Int64)ticks);
return (seconds & 0x80000000L) == 0 ? UtcEpoch2036 + TimeSpan.FromTicks((Int64)ticks) : UtcEpoch1900 + TimeSpan.FromTicks((Int64)ticks);
}
//When the First Epoch will wrap (The real Y2k)
public static DateTime UtcEpoch2036 = new DateTime(2036, 2, 7, 6, 28, 16, DateTimeKind.Utc);
public static DateTime UtcEpoch1900 = new DateTime(1900, 1, 1, 0, 0, 0, DateTimeKind.Utc);
public static DateTime UtcEpoch1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
}
}