public void StartPage(TeletextPageHeader header, UInt64 presentTime)
{
_presentTime = presentTime;
int mag = header.Magazine();
if (mag != _magId)
{
ServiceRegistration.Get <ILogger>().Debug("Magazine magid mag: {0}, {1}", _magId, mag);
}
Assert(mag == _magId, "Inconsistent magazine id");
Assert(_pageNumInProgress == -1 || (_pageNumInProgress >= 100 && _pageNumInProgress <= 966),
"PageNumInProgress out of range");
if (header.IsTimeFiller() || !header.IsSubtitle())
{
// time filling header to indicate end of page
if (_pageNumInProgress != -1)
{
// if we were working on a previous page its finished now
EndPage();
}
//LogDebug("Mag %i FILLER ends page %i", magID, pageNumInProgress);
Clear();
_pageNumInProgress = -1;
return;
}
if (header.IsSerial() && !_isSerial)
{
ServiceRegistration.Get <ILogger>().Debug("MagID {0} is in serial mode", _magId);
_isSerial = true;
}
int newPageNum = header.PageNumber();
_language = header.Language();
if (_pageNumInProgress != newPageNum)
{
//LogDebug("Mag %i, Page %i finished by new page %i", magID, pageNumInProgress, new_page_num);
if (_pageNumInProgress != -1)
{
// if we were working on a previous page its finished now
EndPage();
}
Clear();
_pageNumInProgress = newPageNum;
}
if (header.EraseBit())
{
Clear();
}
Assert(_pageNumInProgress >= 100 && _pageNumInProgress <= 966, "StartPage: pageNumInProgress out of range");
}
public void OnTeletextPacket(byte[] data, UInt64 presentTime)
{
Assert(data.Length == DATA_FIELD_SIZE, "Data length not as expected! " + data.Length);
// data_field
byte reservedParityOffset = data[0]; // parity/offset etc
//LogDebug("first data_field byte: %s", ToBinary(reserved_parity_offset).c_str());
byte reservedFutureUse = (byte)(data[0] & 0xC0); // first two bits
Assert(reservedFutureUse == 0xC0, "Reserved future use unexpected value");
byte fieldParity = (byte)((data[0] & 0x20) >> 5); // 3rd bit
//LogDebug("field parity %i", field_parity);
byte lineOffset = (byte)(data[0] & 0x1F); // last 5 bits
Assert(lineOffset == 0x00 || (lineOffset >= 0x07 && lineOffset <= 0x16), "Line offset wrong!");
byte framingCode = data[1];
Assert(framingCode == 0xE4, "Framing code wrong " + framingCode);
// what is this for? (A: reverse bit ordering)
for (int j = 2; j < DATA_FIELD_SIZE; j++)
{
data[j] = _invtab[data[j]];
}
byte magazineAndPacketAddress1 = data[2];
byte magazineAndPacketAddress2 = data[3];
byte magazineAndPacketAddress = Hamming.Unham(magazineAndPacketAddress1, magazineAndPacketAddress2);
byte mag = (byte)(magazineAndPacketAddress & 7);
// mag == 0 means page is 8nn
if (mag == 0)
{
mag = 8;
}
int magIndex = mag - 1;
Assert(magIndex >= 0 && magIndex <= 7, "Magindex out of range " + magIndex);
byte y = (byte)((magazineAndPacketAddress >> 3) & 0x1f); // Y is the packet number
int offset = 4; // start of data differs between packet types
if (y == 0)
{
// teletext packet header
//ServiceRegistration.Get<ILogger>().Debug("Header package : Data length is {0} , offset is {1}", data.Length, offset);
byte[] offsetdata = new byte[data.Length - offset];
Array.Copy(data, offset, offsetdata, 0, offsetdata.Length);
TeletextPageHeader header = new TeletextPageHeader(mag, offsetdata);
if (header.IsSerial())
{
// to support serial mode, just end all pages in progress (there should be only one)
int inProgress = 0;
for (int i = 0; i < 8; i++)
{
if (_magazines[i].PageInProgress())
{
inProgress++;
}
_magazines[i].EndPage();
}
Assert(inProgress <= 1, "Serial mode: too many pages in progress : " + inProgress);
// at most one page should be in progress
if (inProgress > 1)
{
ServiceRegistration.Get <ILogger>().Debug("Pages in progress at same time exceeds one ! (%i)", inProgress);
}
}
/*if (header.isSubtitle())
* {*/
_magazines[magIndex].StartPage(header, presentTime);
//}
}
else if (y >= 1 && y <= 25)
{
// display content
//ServiceRegistration.Get<ILogger>().Debug("Content package : Data length is {0} , offset is {1}", data.Length, offset);
byte[] offsetdata = new byte[data.Length - offset];
Array.Copy(data, offset, offsetdata, 0, offsetdata.Length);
_magazines[magIndex].SetLine(y, offsetdata);
//WAS: magazines[magIndex].SetLine(Y,&data[offset]);
}
else
{
//LogDebug("Packet %i for magazine %i (discarded)", Y, mag);
}
}
public void StartPage(TeletextPageHeader header, UInt64 presentTime)
{
_presentTime = presentTime;
int mag = header.Magazine();
if (mag != _magId)
{
ServiceRegistration.Get<ILogger>().Debug("Magazine magid mag: {0}, {1}", _magId, mag);
}
Assert(mag == _magId, "Inconsistent magazine id");
Assert(_pageNumInProgress == -1 || (_pageNumInProgress >= 100 && _pageNumInProgress <= 966),
"PageNumInProgress out of range");
if (header.IsTimeFiller() || !header.IsSubtitle())
{
// time filling header to indicate end of page
if (_pageNumInProgress != -1)
{
// if we were working on a previous page its finished now
EndPage();
}
//LogDebug("Mag %i FILLER ends page %i", magID, pageNumInProgress);
Clear();
_pageNumInProgress = -1;
return;
}
if (header.IsSerial() && !_isSerial)
{
ServiceRegistration.Get<ILogger>().Debug("MagID {0} is in serial mode", _magId);
_isSerial = true;
}
int newPageNum = header.PageNumber();
_language = header.Language();
if (_pageNumInProgress != newPageNum)
{
//LogDebug("Mag %i, Page %i finished by new page %i", magID, pageNumInProgress, new_page_num);
if (_pageNumInProgress != -1)
{
// if we were working on a previous page its finished now
EndPage();
}
Clear();
_pageNumInProgress = newPageNum;
}
if (header.EraseBit())
{
Clear();
}
Assert(_pageNumInProgress >= 100 && _pageNumInProgress <= 966, "StartPage: pageNumInProgress out of range");
}
public void OnTeletextPacket(byte[] data, UInt64 presentTime)
{
Assert(data.Length == DATA_FIELD_SIZE, "Data length not as expected! " + data.Length);
// data_field
byte reservedParityOffset = data[0]; // parity/offset etc
//LogDebug("first data_field byte: %s", ToBinary(reserved_parity_offset).c_str());
byte reservedFutureUse = (byte) (data[0] & 0xC0); // first two bits
Assert(reservedFutureUse == 0xC0, "Reserved future use unexpected value");
byte fieldParity = (byte) ((data[0] & 0x20) >> 5); // 3rd bit
//LogDebug("field parity %i", field_parity);
byte lineOffset = (byte) (data[0] & 0x1F); // last 5 bits
Assert(lineOffset == 0x00 || (lineOffset >= 0x07 && lineOffset <= 0x16), "Line offset wrong!");
byte framingCode = data[1];
Assert(framingCode == 0xE4, "Framing code wrong " + framingCode);
// what is this for? (A: reverse bit ordering)
for (int j = 2; j < DATA_FIELD_SIZE; j++)
{
data[j] = _invtab[data[j]];
}
byte magazineAndPacketAddress1 = data[2];
byte magazineAndPacketAddress2 = data[3];
byte magazineAndPacketAddress = Hamming.Unham(magazineAndPacketAddress1, magazineAndPacketAddress2);
byte mag = (byte) (magazineAndPacketAddress & 7);
// mag == 0 means page is 8nn
if (mag == 0) mag = 8;
int magIndex = mag - 1;
Assert(magIndex >= 0 && magIndex <= 7, "Magindex out of range " + magIndex);
byte y = (byte) ((magazineAndPacketAddress >> 3) & 0x1f); // Y is the packet number
int offset = 4; // start of data differs between packet types
if (y == 0)
{
// teletext packet header
//ServiceRegistration.Get<ILogger>().Debug("Header package : Data length is {0} , offset is {1}", data.Length, offset);
byte[] offsetdata = new byte[data.Length - offset];
Array.Copy(data, offset, offsetdata, 0, offsetdata.Length);
TeletextPageHeader header = new TeletextPageHeader(mag, offsetdata);
if (header.IsSerial())
{
// to support serial mode, just end all pages in progress (there should be only one)
int inProgress = 0;
for (int i = 0; i < 8; i++)
{
if (_magazines[i].PageInProgress())
{
inProgress++;
}
_magazines[i].EndPage();
}
Assert(inProgress <= 1, "Serial mode: too many pages in progress : " + inProgress);
// at most one page should be in progress
if (inProgress > 1)
ServiceRegistration.Get<ILogger>().Debug("Pages in progress at same time exceeds one ! (%i)", inProgress);
}
/*if (header.isSubtitle())
{*/
_magazines[magIndex].StartPage(header, presentTime);
//}
}
else if (y >= 1 && y <= 25)
{
// display content
//ServiceRegistration.Get<ILogger>().Debug("Content package : Data length is {0} , offset is {1}", data.Length, offset);
byte[] offsetdata = new byte[data.Length - offset];
Array.Copy(data, offset, offsetdata, 0, offsetdata.Length);
_magazines[magIndex].SetLine(y, offsetdata);
//WAS: magazines[magIndex].SetLine(Y,&data[offset]);
}
else
{
//LogDebug("Packet %i for magazine %i (discarded)", Y, mag);
}
}
