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Fix DVB Teletext subtitle incomplete

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This commit is contained in:
Nikolaj Olsson 2019-11-03 08:06:06 +01:00
parent 762ae24278
commit beb897c351
1 changed files with 28 additions and 4 deletions
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30
libse/TransportStream/Teletext.cs
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@ -257,14 +257,38 @@ namespace Nikse.SubtitleEdit.Core.TransportStream
var colStart = 40;
var colStop = 40;
for (var col = 39; col >= 0; col--)
bool boxOpen = false;
for (var col = 0; col < 40; col++)
{
if (page.Text[row, col] == 0xb)
// replace all 0/B and 0/A characters with 0/20, as specified in ETS 300 706:
// Unless operating in "Hold Mosaics" mode, each character space occupied by a
// spacing attribute is displayed as a SPACE
if (page.Text[row, col] == 0xb) // open the box
{
if (colStart == 40)
{
colStart = col;
break;
}
else
{
page.Text[row, col] = 0x20;
}
boxOpen = true;
}
else if (page.Text[row, col] == 0xa) // close the box
{
page.Text[row, col] = 0x20;
boxOpen = false;
}
// characters between 0xA and 0xB shouldn't be displayed
// page->text[row][col] > 0x20 added to preserve color information
else if (!boxOpen && colStart < 40 && page.Text[row, col] > 0x20)
{
page.Text[row, col] = 0x20;
}
}
// line is empty
if (colStart > 39)
{