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); } }