/// <summary>
/// Nimmt eine analyiserte Seite entgegen.
/// </summary>
/// <param name="page">Die analysierte Seite.</param>
private void PageAnalysed(TTXPage page)
{
// Replace in cache
lock (m_Pages)
if (m_Parser.EnableParser)
{
m_Pages[page.Page] = page;
}
// Current page of interest
int?currentPage = m_CurrentPage;
// See if someone is interested
if (currentPage.HasValue)
{
if (currentPage.Value == page.Page)
{
// Attach to handler
TTXParser.PageHandler handler = OnPageAvailable;
// Fire event
if (null != handler)
{
handler(page);
}
}
}
}
/// <summary>
/// Nimmt eine analyiserte Seite entgegen.
/// </summary>
/// <param name="page">Die analysierte Seite.</param>
private void PageAnalysed( TTXPage page )
{
// Replace in cache
lock (m_Pages)
if (m_Parser.EnableParser)
m_Pages[page.Page] = page;
// Current page of interest
int? currentPage = m_CurrentPage;
// See if someone is interested
if (currentPage.HasValue)
if (currentPage.Value == page.Page)
{
// Attach to handler
TTXParser.PageHandler handler = OnPageAvailable;
// Fire event
if (null != handler) handler( page );
}
}
/// <summary>
/// Wertet den Videotext Kopf aus (Y/0).
/// </summary>
/// <param name="offset">Erstes auszuwertendes Byte.</param>
/// <param name="length">Anzahl der auszuwertenden Bytes.</param>
/// <param name="magazine">Magazinkennung (X oder M).</param>
/// <param name="subTitle">Gesetzt für Untertitelseiten.</param>
/// <returns>Gesetzt, wenn die Daten zulässig waren.</returns>
private bool ProcessEBUPageHeader( int offset, int length, int magazine, bool subTitle )
{
// Finish any outstanding page
if (m_Page[magazine] != null)
{
// Send notification
var handler = OnPage;
if (handler != null)
handler( m_Page[magazine] );
// Forget
m_Page[magazine] = null;
}
// Extract the pager number
int units = Hamming8To4[m_PacketBuffer[offset++]], tens = Hamming8To4[m_PacketBuffer[offset++]];
// Check it
if ((255 == units) || (255 == tens))
{
// Count
++m_ParityError;
// Leave
return false;
}
// Get the page number
int page = (10 * tens) + units;
// Process only if this is a regular page (100 - 899)
if (page > 99)
{
// Silent skip
return true;
}
// Read the rest
int s1 = Hamming8To4[m_PacketBuffer[offset++]];
int s2c4 = Hamming8To4[m_PacketBuffer[offset++]];
int s3 = Hamming8To4[m_PacketBuffer[offset++]];
int s4c5c6 = Hamming8To4[m_PacketBuffer[offset++]];
int c7To10 = Hamming8To4[m_PacketBuffer[offset++]];
int c11To14 = Hamming8To4[m_PacketBuffer[offset++]];
// Verify all
if ((255 == s1) || (255 == s2c4) || (255 == s3) || (255 == s4c5c6) || (255 == c7To10) || (255 == c11To14))
{
// Count
++m_ParityError;
// Leave
return false;
}
// Can adjust length now
length -= 8;
// Extract sub code
int subcode = ((s4c5c6 & 0x3) * 1000) + (s3 * 100) + ((s2c4 & 0x7) * 10) + s1;
// Read data
byte[] data = ReadOddParityBytes( offset, length );
if (data == null)
return false;
// Create the new page
m_Page[magazine] =
new TTXPage( magazine, page, subcode, data )
{
IsSubtitle = subTitle || (0 != (s4c5c6 & 0x08)),
MagazineSerial = (0 != (c11To14 & 0x01)),
OutOfSequence = (0 != (c7To10 & 0x04)),
NoHeader = (0 != (c7To10 & 0x01)),
NationalOptions = (c11To14 >> 1),
Updated = (0 != (c7To10 & 0x02)),
Flash = (0 != (s4c5c6 & 0x04)),
Hide = (0 != (c7To10 & 0x08)),
Erase = (0 != (s2c4 & 0x08)),
TimeStamp = m_LastPTS,
};
// Done
return true;
}
/// <summary>
/// Nimmt eine Videotextseite entgegen.
/// </summary>
/// <param name="page">Die gewünschte Videotextseite, eventuell leer.</param>
/// <param name="digits">Informationen zum Auftreten von Zahlen in der Darstellung.</param>
/// <returns>Gesetzt, wenn eine Seite erfolgreich angezeigt wurde.</returns>
public bool ShowPage( TTXPage page, out DigitManager digits )
{
// Safe create
try
{
// Create the bitmap from the page
RectangleF extend;
using (var ttx = page.CreatePage( this, out digits, out extend ))
{
// Default position
double left = GetNormalizedBorder( 0.8 ), top = 0.1;
double right = 1.0 - left, bottom = 1.0 - top;
// Get the transparency color
if (page.IsTransparent)
{
// There is nothing to show
if (extend.IsEmpty)
return true;
// Check mode
if (UseLegacyOverlay)
{
// Get size
double width = right - left, height = bottom - top;
// Correct against bounds
left += width * extend.Left;
top += height * extend.Top;
// Correct against bounds
right = left + width * extend.Width;
bottom = top + height * extend.Height;
// Get the range of interest
var srcRange =
new RectangleF
(
(float) (extend.Left * ttx.Width),
(float) (extend.Top * ttx.Height),
(float) (extend.Width * ttx.Width),
(float) (extend.Height * ttx.Height)
);
// Create new bitmap
using (var clipped = new Bitmap( ttx, (int) Math.Round( srcRange.Width ), (int) Math.Round( srcRange.Height ) ))
{
// Prepare to update
using (var dest = Graphics.FromImage( clipped ))
{
// Get full ranges
var destRange = new RectangleF( 0, 0, clipped.Width, clipped.Height );
// Fill
dest.DrawImage( ttx, destRange, srcRange, GraphicsUnit.Pixel );
}
// Simpy show up
ShowOverlay( clipped, left, top, right, bottom, null, null );
}
}
else
{
// Simpy show up
ShowOverlay( ttx, left, top, right, bottom, null, TTXPage.TransparentColor.Color );
}
}
else
{
// Simpy show up
ShowOverlay( ttx, left, top, right, bottom, null, null );
}
}
// Did it
return true;
}
catch
{
// Reset
digits = null;
// Leave
return false;
}
}
/// <summary>
/// Nimmt eine Videotextseite entgegen.
/// </summary>
/// <param name="page">Die gewünschte Videotextseite, eventuell leer.</param>
/// <returns>Gesetzt, wenn eine Seite erfolgreich angezeigt wurde.</returns>
public bool ShowPage( TTXPage page )
{
// Helper
DigitManager digits;
// Forward
return ShowPage( page, out digits );
}
/// <summary>
/// Wertet den Videotext Kopf aus (Y/0).
/// </summary>
/// <param name="offset">Erstes auszuwertendes Byte.</param>
/// <param name="length">Anzahl der auszuwertenden Bytes.</param>
/// <param name="magazine">Magazinkennung (X oder M).</param>
/// <param name="subTitle">Gesetzt für Untertitelseiten.</param>
/// <returns>Gesetzt, wenn die Daten zulässig waren.</returns>
private bool ProcessEBUPageHeader(int offset, int length, int magazine, bool subTitle)
{
// Finish any outstanding page
if (m_Page[magazine] != null)
{
// Send notification
var handler = OnPage;
if (handler != null)
{
handler(m_Page[magazine]);
}
// Forget
m_Page[magazine] = null;
}
// Extract the pager number
int units = Hamming8To4[m_PacketBuffer[offset++]], tens = Hamming8To4[m_PacketBuffer[offset++]];
// Check it
if ((255 == units) || (255 == tens))
{
// Count
++m_ParityError;
// Leave
return(false);
}
// Get the page number
int page = (10 * tens) + units;
// Process only if this is a regular page (100 - 899)
if (page > 99)
{
// Silent skip
return(true);
}
// Read the rest
int s1 = Hamming8To4[m_PacketBuffer[offset++]];
int s2c4 = Hamming8To4[m_PacketBuffer[offset++]];
int s3 = Hamming8To4[m_PacketBuffer[offset++]];
int s4c5c6 = Hamming8To4[m_PacketBuffer[offset++]];
int c7To10 = Hamming8To4[m_PacketBuffer[offset++]];
int c11To14 = Hamming8To4[m_PacketBuffer[offset++]];
// Verify all
if ((255 == s1) || (255 == s2c4) || (255 == s3) || (255 == s4c5c6) || (255 == c7To10) || (255 == c11To14))
{
// Count
++m_ParityError;
// Leave
return(false);
}
// Can adjust length now
length -= 8;
// Extract sub code
int subcode = ((s4c5c6 & 0x3) * 1000) + (s3 * 100) + ((s2c4 & 0x7) * 10) + s1;
// Read data
byte[] data = ReadOddParityBytes(offset, length);
if (data == null)
{
return(false);
}
// Create the new page
m_Page[magazine] =
new TTXPage(magazine, page, subcode, data)
{
IsSubtitle = subTitle || (0 != (s4c5c6 & 0x08)),
MagazineSerial = (0 != (c11To14 & 0x01)),
OutOfSequence = (0 != (c7To10 & 0x04)),
NoHeader = (0 != (c7To10 & 0x01)),
NationalOptions = (c11To14 >> 1),
Updated = (0 != (c7To10 & 0x02)),
Flash = (0 != (s4c5c6 & 0x04)),
Hide = (0 != (c7To10 & 0x08)),
Erase = (0 != (s2c4 & 0x08)),
TimeStamp = m_LastPTS,
};
// Done
return(true);
}
