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Fix for teletext parsing crash - thx yellobyte :)

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Fix #8186
This commit is contained in:
Nikolaj Olsson 2024-04-15 07:17:16 +02:00
parent 68b7d3fd14
commit 39ed7a1e1b
1 changed files with 4 additions and 1 deletions
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5
src/libse/ContainerFormats/TransportStream/DvbSubPes.cs
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@ -123,10 +123,11 @@ namespace Nikse.SubtitleEdit.Core.ContainerFormats.TransportStream
if (dataUnitLen == 44) // teletext payload has always size 44 bytes if (dataUnitLen == 44) // teletext payload has always size 44 bytes
{ {
// reverse endianness (via lookup table), ETS 300 706, chapter 7.1 // reverse endianness (via lookup table), ETS 300 706, chapter 7.1
for (var j = 0; j < dataUnitLen; j++) for (var j = 0; j < dataUnitLen && i + j < _dataBuffer.Length; j++)
{ {
_dataBuffer[i + j] = TeletextHamming.Reverse8[_dataBuffer[i + j]]; _dataBuffer[i + j] = TeletextHamming.Reverse8[_dataBuffer[i + j]];
} }
var pageNumber = Teletext.GetPageNumber(new Teletext.TeletextPacketPayload(_dataBuffer, i)); var pageNumber = Teletext.GetPageNumber(new Teletext.TeletextPacketPayload(_dataBuffer, i));
if (!pages.Contains(pageNumber) && pageNumber > 0) if (!pages.Contains(pageNumber) && pageNumber > 0)
{ {
@ -134,8 +135,10 @@ namespace Nikse.SubtitleEdit.Core.ContainerFormats.TransportStream
} }
} }
} }
i += dataUnitLen; i += dataUnitLen;
} }
return pages; return pages;
} }