/// <summary>
/// Gets the byte section of the table.
/// </summary>
/// <param name="packet">The starting packet for the table.</param>
/// <param name="tableId">TableId</param>
/// <returns>Section of bytes.</returns>
private byte[] GetEntireTable(TSPacketInfo packet, int tableId)
{
Ensure.IsNotNull(Log, packet, "packet is null");
if (!packet.PayloadUnitStartIndicator || !packet.HasPayload)
{
//throw new CustomException("The packet doesn't contain a table section.");
return(null);
}
var pointerField = packet.GetDataByte(0);
if (pointerField != 0)
{
//Ensure.IsZero(Log, pointerField, "pointer field must be zero.");
return(null);
}
// TODO: move to PATSection
var pTableId = packet.GetDataByte(1);
if (tableId != pTableId)
{
//Ensure.AreEqual(Log, tableId, pTableId, "TableId is invalid.");
return(null);
}
var sectionSyntaxIndicator = BinaryUtils.ReadBool(packet.GetDataByte(2), 0);
if (!sectionSyntaxIndicator)
{
//Ensure.IsTrue(Log, sectionSyntaxIndicator, "sectionSyntaxIndicator is not true.");
return(null);
}
var padding = BinaryUtils.ReadBool(packet.GetDataByte(2), 1);
if (padding)
{
//Ensure.IsFalse(Log, padding, "padding is not false.");
return(null);
}
var reserved = BinaryUtils.GetBits(packet.GetDataByte(2), 2, 2);
if (reserved != 3)
{
//Ensure.AreEqual(Log, 3, reserved, "reserved is not 11b (3).");
return(null);
}
var sectionLen = BinaryUtils.GetBitsEx(packet.Segment, packet.DataBytePos + 2, 4, 12);
sectionLen = Math.Min(4096, sectionLen) - (Constants.TSPacketSize - packet.DataBytePos - 3); // TODO: Review.
var sectionData = new byte[4096];
var sectionOffset = 0;
Buffer.BlockCopy(packet.Segment.Array, packet.Segment.Offset, sectionData, sectionOffset, packet.Segment.Count);
sectionOffset += packet.Segment.Count;
while (sectionLen > 0)
{
var nextPacket = this.GetPacket();
if (nextPacket == null)
{
continue;
}
if (!nextPacket.PayloadUnitStartIndicator &&
nextPacket.AdaptationFieldControl == AdaptationType.Payload &&
nextPacket.PID == packet.PID)
{
var len = nextPacket.Segment.Count - 4;
Buffer.BlockCopy(nextPacket.Segment.Array, nextPacket.Segment.Offset + 4, sectionData, sectionOffset, len);
sectionOffset += len;
sectionLen -= len;
}
}
return(sectionData);
}
/// <summary>
/// Gets the byte section of the table.
/// </summary>
/// <param name="packet">The starting packet for the table.</param>
/// <param name="tableId">TableId</param>
/// <returns>Section of bytes.</returns>
private byte[] GetEntireTable(TSPacketInfo packet, int tableId)
{
Ensure.IsNotNull(Log, packet, "packet is null");
if (!packet.PayloadUnitStartIndicator || !packet.HasPayload)
{
//throw new CustomException("The packet doesn't contain a table section.");
return null;
}
var pointerField = packet.GetDataByte(0);
if (pointerField != 0)
{
//Ensure.IsZero(Log, pointerField, "pointer field must be zero.");
return null;
}
// TODO: move to PATSection
var pTableId = packet.GetDataByte(1);
if (tableId != pTableId)
{
//Ensure.AreEqual(Log, tableId, pTableId, "TableId is invalid.");
return null;
}
var sectionSyntaxIndicator = BinaryUtils.ReadBool(packet.GetDataByte(2), 0);
if (!sectionSyntaxIndicator)
{
//Ensure.IsTrue(Log, sectionSyntaxIndicator, "sectionSyntaxIndicator is not true.");
return null;
}
var padding = BinaryUtils.ReadBool(packet.GetDataByte(2), 1);
if (padding)
{
//Ensure.IsFalse(Log, padding, "padding is not false.");
return null;
}
var reserved = BinaryUtils.GetBits(packet.GetDataByte(2), 2, 2);
if (reserved != 3)
{
//Ensure.AreEqual(Log, 3, reserved, "reserved is not 11b (3).");
return null;
}
var sectionLen = BinaryUtils.GetBitsEx(packet.Segment, packet.DataBytePos + 2, 4, 12);
sectionLen = Math.Min(4096, sectionLen) - (Constants.TSPacketSize - packet.DataBytePos - 3); // TODO: Review.
var sectionData = new byte[4096];
var sectionOffset = 0;
Buffer.BlockCopy(packet.Segment.Array, packet.Segment.Offset, sectionData, sectionOffset, packet.Segment.Count);
sectionOffset += packet.Segment.Count;
while (sectionLen > 0)
{
var nextPacket = this.GetPacket();
if (nextPacket == null)
{
continue;
}
if (!nextPacket.PayloadUnitStartIndicator &&
nextPacket.AdaptationFieldControl == AdaptationType.Payload &&
nextPacket.PID == packet.PID)
{
var len = nextPacket.Segment.Count - 4;
Buffer.BlockCopy(nextPacket.Segment.Array, nextPacket.Segment.Offset + 4, sectionData, sectionOffset, len);
sectionOffset += len;
sectionLen -= len;
}
}
return sectionData;
}
