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N_m3u8DL-RE
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优化非`cenc`的场景

This commit is contained in:
nilaoda 2022-11-13 12:51:48 +08:00
parent 84c5bf8884
commit f2976d3f92
1 changed files with 3 additions and 3 deletions
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6
src/N_m3u8DL-RE.Parser/Mp4/MP4InitUtil.cs
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@ -66,11 +66,11 @@ namespace Mp4SubtitleParser
info.Scheme = System.Text.Encoding.UTF8.GetString(data[schmIndex..][8..12]); info.Scheme = System.Text.Encoding.UTF8.GetString(data[schmIndex..][8..12]);
} }
if (info.Scheme != "cenc") return; //if (info.Scheme != "cenc") return;
//find KID //find KID
var tencBytes = new byte[4] { 0x74, 0x65, 0x6E, 0x63 }; var tencBytes = new byte[4] { 0x74, 0x65, 0x6E, 0x63 };
var tencIndex = 0; var tencIndex = -1;
for (int i = 0; i < data.Length - 4; i++) for (int i = 0; i < data.Length - 4; i++)
{ {
if (new byte[4] { data[i], data[i + 1], data[i + 2], data[i + 3] }.SequenceEqual(tencBytes)) if (new byte[4] { data[i], data[i + 1], data[i + 2], data[i + 3] }.SequenceEqual(tencBytes))
@ -79,7 +79,7 @@ namespace Mp4SubtitleParser
break; break;
} }
} }
if (tencIndex + 12 < data.Length) if (tencIndex != -1 && tencIndex + 12 < data.Length)
{ {
info.KID = HexUtil.BytesToHex(data[tencIndex..][12..28]).ToLower(); info.KID = HexUtil.BytesToHex(data[tencIndex..][12..28]).ToLower();
} }