packetprocessing.cpp

Teletext module usually used in the DVB area.

	int last_character[25];

	if (m_nValidLines > 0)
	{
        for (int line = (display_heading_line ? 0 : 1); line <= last_line; line++)
		{
			if (m_PageBuffer[line].m_bTransmitted)
			{
				row_numbers[subtitle_lines] = line;
				memcpy(page[subtitle_lines], &m_PageBuffer[line].m_Line, 40);
				subtitle_lines++;
			}
		}
	}

	if (subtitle_lines == 0)
	{
		return;
	}

	char tmp[41];
	for (int row = 0; row < subtitle_lines; row++)
	{
		first_character[row] = -1;

		int n = 0;

		for (int character = 1; character <= 40; character++)
		{
			char ch = page[row][character - 1] & 0x7f;

			if ((first_character[row] < 0) && (ch > 32))
			{
				first_character[row] = character;
			}

			if (ch < 32)
			{
				ch = 32;
			}

			tmp[n++] = ch;
		}

		last_character[row] = 40;

		while 
		(
			(last_character[row] > 0)
			&&
			(tmp[last_character[row] - 1] == ' ')
		)
		{
			last_character[row]--;
		}

		tmp[n] = 0;
	}

	bool alpha = false;

	for (int row = 0; row < subtitle_lines; row++)
	{
		colour_types colour = Colour_White;
		colour_types background_colour = Colour_Black;
		colour_types mosaic_colour = Colour_Black;
		colour_types latest_colour = colour;

		int text_index = 0;

		STeletextSubtitleLine teletext_subtitle_line;
		teletext_subtitle_line.row = row_numbers[row];
		teletext_subtitle_line.column = first_character[row];
#define ATLTRACE1

		ATLTRACE1("<row=%d><column=%d>", teletext_subtitle_line.row, teletext_subtitle_line.column); 

		for (int column = 1; column <= 40; column++)
		{
			char ch = page[row][column - 1] & 0x7f;
			if (ch >= ' ')
			{
				if ( (column >= first_character[row]) && (column <= last_character[row]) )
				{
					teletext_subtitle_line.text[text_index++] = vtx2iso8559_1_table[m_Language][ch - 0x20];
				}
			}
			else
			{
				if ( (column >= first_character[row]) && (column <= last_character[row]) )
				{
					if (text_index < (sizeof(teletext_subtitle_line.text) / sizeof(teletext_subtitle_line.text[0])))
					{
                        teletext_subtitle_line.text[text_index++] = ' ';
					}
				}

                switch (ch)
                {
                // Alpha Colour (Set After)
                case 0 : 
                    latest_colour = colour = Colour_Black;
					alpha = true;
					ATLTRACE1("<alpha black>");
					break;

                case 1 :  
                    latest_colour = colour = Colour_Red;
					alpha = true;
					ATLTRACE1("<alpha red>");
					break;

                case 2 :  
					latest_colour = colour = Colour_Green;
					alpha = true;
					ATLTRACE1("<alpha green>");
					break;

                case 3 :  
					latest_colour = colour = Colour_Yellow;
					alpha = true;
					ATLTRACE1("<alpha yellow>");
					break;

                case 4 :  
                    latest_colour = colour = Colour_Blue;
					alpha = true;
					ATLTRACE1("<alpha blue>");
					break;

                case 5 :  
                    latest_colour = colour = Colour_Magenta;
					alpha = true;
					ATLTRACE1("<alpha magenta>");
					break;

                case 6 :  
                    latest_colour = colour = Colour_Cyan;
					alpha = true;
					ATLTRACE1("<alpha cyan>");
					break;

                case 7 :  
                    latest_colour = colour = Colour_White;
					alpha = true;
					ATLTRACE1("<alpha white>");
					break;

                case 0x8 :
                     // Start Flash (Set After)
					ATLTRACE1("<Start Flash>"); 
                    break;

                case 0x9 :
                    // Steady (Set At)
					ATLTRACE1("<Steady>"); 
                    break;

                case 0xa :
                    // End Box (Set After)
					ATLTRACE1("<End Box>"); 
                    break;

                case 0xb :
                    // Start Box (Set After)
					ATLTRACE1("<Start Box>"); 
                    break;

                case 0xc :
                    // Normal Size (Set At)
					ATLTRACE1("<Normal Size>"); 
                    break;

                case 0xd :
                    // Double height (Set After)
					ATLTRACE1("<Double height>"); 
                    break;

                case 0xe :
                    // Double width (Set After)
					ATLTRACE1("<Double width>"); 
                    break;

                case 0xf :
                    // Double size (Set After)
					ATLTRACE1("<Double size>"); 
                    break;

                // Mosaic colour(Set After)
                case 0x10 : latest_colour = mosaic_colour = Colour_Black; alpha = false; ATLTRACE1("<mosaic Black>"); break;
                case 0x11 : latest_colour = mosaic_colour = Colour_Red; alpha = false; ATLTRACE1("<mosaic red>"); break;
                case 0x12 : latest_colour = mosaic_colour = Colour_Green; alpha = false; ATLTRACE1("<mosaic green>"); break;
                case 0x13 : latest_colour = mosaic_colour = Colour_Yellow; alpha = false; ATLTRACE1("<mosaic yellow>"); break;
                case 0x14 : latest_colour = mosaic_colour = Colour_Blue; alpha = false; ATLTRACE1("<mosaic blue>"); break;
                case 0x15 : latest_colour = mosaic_colour = Colour_Magenta; alpha = false; ATLTRACE1("<mosaic magenta>"); break;
                case 0x16 : latest_colour =  mosaic_colour = Colour_Cyan; alpha = false; ATLTRACE1("<mosaic cyan>"); break;
                case 0x17 : latest_colour = mosaic_colour = Colour_White; alpha = false; ATLTRACE1("<mosaic white>"); break;

                case 0x18 :
                    // Conceal (Set At)
					ATLTRACE1("<Conceal>"); 
                    break;

                case 0x19 :
                    // Contiguous Mosaic Graphics (Set At)
					ATLTRACE1("<Contiguous Mosaic>"); 
                    break;

                case 0x1A :
                    // Seperated Mosaic Graphics (Set At)
					ATLTRACE1("<Seperated Mosaic>"); 
                    break;

                case 0x1B :
                    // Escape (Set After)
					ATLTRACE1("<Escape>"); 
                    break;

                case 0x1C :
                    // Black background (Set At)
                    background_colour = Colour_Black;
					ATLTRACE1("<Black background>"); 
                    break;

                case 0x1D :
                    // New background
                    // The foreground colour becomes the background colour
                    // any new characters until foreground would be invisible.
                    background_colour = latest_colour;
					ATLTRACE1("<New background>"); 
                    break;

                case 0x1E :
                    // Hold Mosaics (Set At)
					ATLTRACE1("<Hold Mosaics>"); 
                    break;

                case 0x1F :
                    // Release Mosaics (Set At)
					ATLTRACE1("<Release Mosaics>"); 
                    break;

                default :
					ATLTRACE1("<default!!!>"); 
                    break;
                }
			}
		}


		teletext_subtitle_line.m_Colour = colour;
		teletext_subtitle_line.m_BackgroundColour = background_colour;

		if (text_index < (sizeof(teletext_subtitle_line.text) / sizeof(teletext_subtitle_line.text[0])))
		{
			teletext_subtitle_line.text[text_index++] = '\0';
		}

		if (alpha)
		{
            ATLTRACE1("<text=%s>", teletext_subtitle_line.text); 
		}
		else
		{
            ATLTRACE1("<mosaic=%s>", teletext_subtitle_line.text); 
		}

        ATLTRACE1("\n");

		texts.push_back(teletext_subtitle_line);
	}
}

bool
SMagazineSubPage::SetLine
(
	int line,
	unsigned char* data,
	int mag,
	int last_line,
    SMagazine* magazine,
    unsigned __int64 program_time_ms
)
{
	bool updated = false;
	if (line == 0)
	{ 
		if (m_Valid) // valid from last time, that means all the lines have been transmitted.
		{
            m_Displayed = false;
            magazine->AddPageUnderConstruction(); // add this subpage, it is ready

            updated = true;
        }

        // Using this buffer to start a brand new page.
		m_nPage = (mag << 8) | unham(data[0], data[1]); // The lower two (hex) numbers of page
        m_nSubPage = ((unham(data[4], data[5]) << 8) | unham(data[2], data[3])) & 0x3F7F;
		m_Language = ((unham(data[6], data[7]) >> 5) & 0x07);
        m_StartMilliseconds = program_time_ms;
        m_EndMilliseconds = 0;
		m_Valid = true;

        m_bErasePage =                     (data[3] & 0x80) == 0x80; // Byte 9,  bit 8
        m_bNewsflash =                     (data[5] & 0x20) == 0x20; // Byte 11, bit 6
        m_bSubtitle =                      (data[5] & 0x80) == 0x80; // Byte 11, bit 8
        m_bSupressHeader =                 (data[6] & 0x02) == 0x02; // Byte 12, bit 2
        m_bUpdateIndicator =               (data[6] & 0x08) == 0x08; // Byte 12, bit 4
        m_bInterruptedSequence =           (data[6] & 0x20) == 0x20; // Byte 12, bit 6
        m_bInhibitDisplay =                (data[6] & 0x80) == 0x80; // Byte 12, bit 8
        m_bMagazineSerial =                (data[7] & 0x02) == 0x02; // Byte 13, bit 2

        ClearPageBuffer();
	} 

	if (m_Valid)
	{