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Extra validation for TS packets - trying to fix #1397

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niksedk 2015-11-08 08:31:29 +01:00
parent 8aec83e606
commit 183510cff4
1 changed files with 7 additions and 1 deletions
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8
libse/TransportStream/Packet.cs
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@ -110,6 +110,9 @@ namespace Nikse.SubtitleEdit.Core.TransportStream
public Packet(byte[] packetBuffer)
{
if (packetBuffer == null || packetBuffer.Length < 30)
return;
TransportErrorIndicator = 1 == packetBuffer[1] >> 7; // Set by demodulator if can't correct errors in the stream, to tell the demultiplexer that the packet has an uncorrectable error
PayloadUnitStartIndicator = 1 == ((packetBuffer[1] & 64) >> 6); // and with 01000000 to get second byte - 1 means start of PES data or PSI otherwise zero
TransportPriority = 1 == ((packetBuffer[1] & 32) >> 5); // and with 00100000 to get third byte - 1 means higher priority than other packets with the same PID
@ -134,7 +137,10 @@ namespace Nikse.SubtitleEdit.Core.TransportStream
}
// Save payload
Payload = new byte[packetBuffer.Length - payloadStart];
int payloadLength = packetBuffer.Length - payloadStart;
if (payloadLength < 0)
return;
Payload = new byte[payloadLength];
Buffer.BlockCopy(packetBuffer, payloadStart, Payload, 0, Payload.Length);
}
}