public void StartPage(TeletextPageHeader header, UInt64 presentTime)
{
this.presentTime = presentTime;
int mag = header.Magazine();
if (mag != magID)
{
Log.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() && !this.isSerial)
{
Log.Debug("MagID {0} is in serial mode", magID);
this.isSerial = true;
}
int new_page_num = header.PageNumber();
if (pageNumInProgress != new_page_num)
{
//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();
}
language = header.Language();
Clear();
pageNumInProgress = new_page_num;
}
if (header.eraseBit())
{
Clear();
}
assert(pageNumInProgress >= 100 && pageNumInProgress <= 966, "StartPage: pageNumInProgress out of range");
}
public void StartPage(TeletextPageHeader header, UInt64 presentTime)
{
this.presentTime = presentTime;
int mag = header.Magazine();
if (mag != magID)
{
Log.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() && !this.isSerial)
{
Log.Debug("MagID {0} is in serial mode", magID);
this.isSerial = true;
}
int new_page_num = header.PageNumber();
if (pageNumInProgress != new_page_num)
{
//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();
}
language = header.Language();
Clear();
pageNumInProgress = new_page_num;
}
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 reserved_parity_offset = data[0]; // parity/offset etc
//LogDebug("first data_field byte: %s", ToBinary(reserved_parity_offset).c_str());
byte reserved_future_use = (byte)(data[0] & 0xC0); // first two bits
assert(reserved_future_use == 0xC0, "Reserved future use unexpected value");
byte field_parity = (byte)((data[0] & 0x20) >> 5); // 3rd bit
//LogDebug("field parity %i", field_parity);
byte line_offset = (byte)(data[0] & 0x1F); // last 5 bits
assert(line_offset == 0x00 || (line_offset >= 0x07 && line_offset <= 0x16), "Line offset wrong!");
byte framing_code = data[1];
assert(framing_code == 0xE4, "Framing code wrong " + framing_code);
// what is this for? (A: reverse bit ordering)
for (int j = 2; j < DATA_FIELD_SIZE; j++)
{
data[j] = invtab[data[j]];
}
byte magazine_and_packet_address1 = data[2];
byte magazine_and_packet_address2 = data[3];
byte magazine_and_packet_address = Hamming.unham(magazine_and_packet_address1, magazine_and_packet_address2);
byte mag = (byte)(magazine_and_packet_address & 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)((magazine_and_packet_address >> 3) & 0x1f); // Y is the packet number
int offset = 4; // start of data differs between packet types
if (Y == 0)
{
// teletext packet header
//Log.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)
{
Log.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
//Log.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 OnTeletextPacket(byte[] data, UInt64 presentTime)
{
assert(data.Length == DATA_FIELD_SIZE, "Data length not as expected! " + data.Length);
// data_field
byte reserved_parity_offset = data[0]; // parity/offset etc
//LogDebug("first data_field byte: %s", ToBinary(reserved_parity_offset).c_str());
byte reserved_future_use = (byte)(data[0] & 0xC0); // first two bits
assert(reserved_future_use == 0xC0, "Reserved future use unexpected value");
byte field_parity = (byte)((data[0] & 0x20) >> 5); // 3rd bit
//LogDebug("field parity %i", field_parity);
byte line_offset = (byte)(data[0] & 0x1F); // last 5 bits
assert(line_offset == 0x00 || (line_offset >= 0x07 && line_offset <= 0x16), "Line offset wrong!");
byte framing_code = data[1];
assert(framing_code == 0xE4, "Framing code wrong " + framing_code);
// what is this for? (A: reverse bit ordering)
for (int j = 2; j < DATA_FIELD_SIZE; j++)
{
data[j] = invtab[data[j]];
}
byte magazine_and_packet_address1 = data[2];
byte magazine_and_packet_address2 = data[3];
byte magazine_and_packet_address = Hamming.unham(magazine_and_packet_address1, magazine_and_packet_address2);
byte mag = (byte)(magazine_and_packet_address & 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)((magazine_and_packet_address >> 3) & 0x1f); // Y is the packet number
int offset = 4; // start of data differs between packet types
if (Y == 0)
{
// teletext packet header
//Log.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)
{
Log.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
//Log.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);
}
}