ft/skyscraper8
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 2 Wiki Activity

Added an option for parsing FLUTE-LCT Frames with ATSC3's peculiarities.
All checks were successful
🚀 Pack skyscraper8 / make-zip (push) Successful in 1m16s
Details

Browse Source
This commit is contained in:
feyris-tan 2026-06-07 21:56:39 +02:00
parent f5736fca13
commit 2e173d4156
3 changed files with 23 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
skyscraper8/Atsc/A331/Atsc3Unpacker.cs
View File

@ -11,6 +11,7 @@ using skyscraper5.Skyscraper;
using skyscraper5.Skyscraper.Plugins;
using skyscraper5.Skyscraper.Scraper;
using skyscraper8.Atsc.A331.Schema;
using skyscraper8.Ietf.FLUTE;
namespace skyscraper8.Atsc.A331
{
@ -71,6 +72,8 @@ namespace skyscraper8.Atsc.A331
{
return;
}
LctFrame lctFrame = new LctFrame(udpPacket.Payload, true);
}
private void HandleLls(LlsTable lls)

4
skyscraper8/DvbNip/DvbNipReceiver.cs
View File

@ -53,7 +53,7 @@ namespace skyscraper8.DvbNip
UserDatagram discoveryUdpPacket = new UserDatagram(ipv4Packet);
if (discoveryUdpPacket.DestinationPort == 3937)
{
LctFrame discoveryLctFrame = new LctFrame(discoveryUdpPacket.Payload);
LctFrame discoveryLctFrame = new LctFrame(discoveryUdpPacket.Payload, false);
if (discoveryLctFrame == null)
return;
LctHeader lctHeader = discoveryLctFrame.LctHeader;
@ -77,7 +77,7 @@ namespace skyscraper8.DvbNip
}
UserDatagram udpPacket = new UserDatagram(ipv4Packet);
LctFrame lctFrame = new LctFrame(udpPacket.Payload);
LctFrame lctFrame = new LctFrame(udpPacket.Payload, false);
if (lctFrame.LctHeader == null)
{
return;

20
skyscraper8/Ietf/FLUTE/LctFrame.cs
View File

@ -11,8 +11,10 @@ namespace skyscraper8.Ietf.FLUTE
{
internal class LctFrame
{
public LctFrame(byte[] buffer)
public LctFrame(byte[] buffer, bool isAtsc3)
{
this.Atsc3Compliant = isAtsc3;
MemoryStream ms = new MemoryStream(buffer, false);
byte byteA = ms.ReadUInt8();
this.Version = (byteA & 0xf0) >> 4;
@ -46,7 +48,17 @@ namespace skyscraper8.Ietf.FLUTE
if (ms.GetAvailableBytes() < 4)
return;
this.FecHeader = new FecHeader(ms);
//TODO: This assumes to always be Code Point 0, like in DVB-NIP, but ATSC3 uses Code Point 8.
//ATSC 3 sample: salvage strat1 "Z:\Persönliches\Satellitescommunity\Skyscraper Test Fixture\65.0W_11304.256_V_30000_(2026-05-17 09.44.02)_dump.ts"
//DVB-NIP sample: "Z:\Persönliches\Satellitescommunity\Skyscraper Test Fixture\astra1_11141h_gse_nip.ts"
if (!isAtsc3)
{
this.FecHeader = new FecHeader(ms);
}
else
{
this.Atsc3ObjectStartOffset = ms.ReadUInt32BE();
}
long avails = ms.GetAvailableBytes();
if (avails == 0)
@ -60,6 +72,10 @@ namespace skyscraper8.Ietf.FLUTE
}
}
public uint? Atsc3ObjectStartOffset { get; set; }
public bool Atsc3Compliant { get; set; }
public int Version { get; }
public int CongestionControlFlag { get; }
public int ProtocolSpecificIndication { get; }