public Result ProcessPmtSection(DataStore section, out Service service)
{
Result result = new Result();
byte[] data = section.GetData();
//PMT must at least have 8 bytes header and 4 bytes crc32.
if (section.GetLeftBitLength() <= (12 * 8))
{
result.SetResult(ResultCode.INSUFFICIENT_DATA);
}
if (result.Fine)
{
//Check CRC32.
if (0 != Utility.GetCrc32(data, 0, data.Length))
{
result.SetResult(ResultCode.INVALID_DATA);//CRC error.
}
}
Int64 bitoffset = 0;
if (result.Fine)
{
//Skip 3 bytes header.
result = section.SkipBits(ref bitoffset, 3 * 8);
}
Int64 programNumber = 0;
if (result.Fine)
{
//Read program number.
result = section.ReadBits(ref bitoffset, 16, ref programNumber);
}
if (result.Fine)
{
//Skip version_number, section_number and last_section_number and 3 bits reserved.
result = section.SkipBits(ref bitoffset, 3 * 8 + 3);
}
Int64 pcrPID = 0;
if (result.Fine)
{
result = section.ReadBits(ref bitoffset, 13, ref pcrPID);
}
if (result.Fine)
{
//To remove crc32.
result = section.CutOff(32);
}
service = null;
if (result.Fine)
{
service = new Service();
service.PcrPid = (UInt16)pcrPID;
service.ServiceId = (UInt16)programNumber;
//Skip 4 bits reserved.
result = section.SkipBits(ref bitoffset, 4);
}
Int64 programInfoLength = 0;
if (result.Fine)
{
result = section.ReadBits(ref bitoffset, 12, ref programInfoLength);
}
if (result.Fine)
{
//Get all program level CA descriptors.
result = FindAllCaDescriptor(section, ref bitoffset, service.GetCaDescriptorList(), ref programInfoLength);
}
if (result.Fine)
{
Int64 streamType = 0;
Int64 elementaryPid = 0;
Int64 esInfoLength = 0;
while (section.GetLeftBitLength() > 0)
{
result = section.ReadBits(ref bitoffset, 8, ref streamType);
if (result.Fine)
{
result = section.SkipBits(ref bitoffset, 3);//Skip 3 bits reserved.
}
if (result.Fine)
{
result = section.ReadBits(ref bitoffset, 13, ref elementaryPid);
}
if (result.Fine)
{
result = section.SkipBits(ref bitoffset, 4);//Skip 4 bits reserved.
}
if (result.Fine)
{
result = section.ReadBits(ref bitoffset, 12, ref esInfoLength);
}
if (result.Fine)
{
ComponentStream componentStream = new ComponentStream();
componentStream.StreamType = (byte)streamType;
componentStream.ElementaryPid = (UInt16)elementaryPid;
//Get all stream level CA descriptors.
result = FindAllCaDescriptor(section, ref bitoffset, componentStream.GetCaDescriptorList(), ref esInfoLength);
if (result.Fine)
{
service.AddComponentStream(componentStream);
}
}
if (!result.Fine)
{
break;
}
}
}
return(result);
}
public void AddComponentStream(ComponentStream componentStream)
{
componentStreamList.Add(componentStream);
}