public ProgramMapTable(byte[] packetBuffer, int index)
{
var pointer = packetBuffer[index];
if (pointer > 0)
{
index += pointer;
}
else
{
index++;
}
TableId = packetBuffer[index];
SectionLength = (packetBuffer[index + 1] & Helper.B00000011) * 256 + packetBuffer[index + 2];
ProgramNumber = packetBuffer[index + 3] * 256 + packetBuffer[index + 4];
VersionNumber = (packetBuffer[index + 5] & Helper.B00111110) >> 1;
CurrentNextIndicator = packetBuffer[index + 5] & 1;
SectionNumber = packetBuffer[index + 6];
LastSectionNumber = packetBuffer[index + 7];
PcrId = (packetBuffer[index + 8] & Helper.B00011111) * 256 + packetBuffer[index + 9];
var programInfoLength = (packetBuffer[index + 10] & Helper.B00001111) * 256 + packetBuffer[index + 11];
Descriptors = ProgramMapTableDescriptor.ReadDescriptors(packetBuffer, programInfoLength, index + 12);
var newIndex = index + 12 + Descriptors.Sum(p => p.Size);
Streams = new List <ProgramMapTableStream>();
while (newIndex - index < SectionLength - 4)
{
var stream = new ProgramMapTableStream(packetBuffer, newIndex);
Streams.Add(stream);
newIndex += stream.Size;
}
}
public static List <ProgramMapTableDescriptor> ReadDescriptors(byte[] data, int size, int index)
{
var total = 0;
var descriptors = new List <ProgramMapTableDescriptor>();
while (total < size)
{
var descriptor = new ProgramMapTableDescriptor(data, total + index);
descriptors.Add(descriptor);
total += descriptor.Size;
}
return(descriptors);
}
public ProgramMapTableStream(byte[] data, int index)
{
StreamType = data[index];
// 13 bytes (skip first 3)
ElementaryPid = (data[index + 1] & Helper.B00011111) * 256 + // first 5 bytes
data[index + 2]; // last 8 bytes
var esInfoLength = (data[index + 3] & Helper.B00001111) * 256 + // first 5 bytes
data[index + 4]; // last 8 bytes
Descriptors = ProgramMapTableDescriptor.ReadDescriptors(data, esInfoLength, index + 5);
Size = 5 + Descriptors.Sum(p => p.Size);
}