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N_m3u8DL-RE
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优化代码

This commit is contained in:
nilaoda 2022-08-17 00:36:44 +08:00
parent 3140fcbbb9
commit 04eaa64d4e
2 changed files with 38 additions and 27 deletions
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2
src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
View File

@ -89,7 +89,7 @@ namespace N_m3u8DL_RE.CommandLine
public static async Task<int> InvokeArgs(string[] args, Func<MyOption, Task> action) public static async Task<int> InvokeArgs(string[] args, Func<MyOption, Task> action)
{ {
var rootCommand = new RootCommand("N_m3u8DL-RE (Beta version) 20220815") var rootCommand = new RootCommand("N_m3u8DL-RE (Beta version) 20220817")
{ {
Input, TmpDir, SaveDir, SaveName, ThreadCount, AutoSelect, SkipMerge, SkipDownload, CheckSegmentsCount, Input, TmpDir, SaveDir, SaveName, ThreadCount, AutoSelect, SkipMerge, SkipDownload, CheckSegmentsCount,
BinaryMerge, DelAfterDone, WriteMetaJson, AppendUrlParams, Headers, /**SavePattern,**/ SubOnly, SubtitleFormat, AutoSubtitleFix, BinaryMerge, DelAfterDone, WriteMetaJson, AppendUrlParams, Headers, /**SavePattern,**/ SubOnly, SubtitleFormat, AutoSubtitleFix,

63
src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
View File

@ -35,6 +35,29 @@ namespace N_m3u8DL_RE.DownloadManager
return info.KID; return info.KID;
} }
private string? ReadInit(string output)
{
using (var fs = File.OpenRead(output))
{
var header = new byte[4096]; //4KB
fs.Read(header);
return ReadInit(header);
}
}
//从文件读取KEY
private async Task SearchKeyAsync(string? currentKID)
{
var _key = await MP4DecryptUtil.SearchKeyFromFile(DownloaderConfig.KeyTextFile, currentKID);
if (_key != null)
{
if (DownloaderConfig.Keys == null)
DownloaderConfig.Keys = new string[] { _key };
else
DownloaderConfig.Keys = DownloaderConfig.Keys.Concat(new string[] { _key }).ToArray();
}
}
private void ChangeSpecInfo(StreamSpec streamSpec, List<Mediainfo> mediainfos) private void ChangeSpecInfo(StreamSpec streamSpec, List<Mediainfo> mediainfos)
{ {
if (!DownloaderConfig.BinaryMerge && mediainfos.Any(m => m.DolbyVison == true)) if (!DownloaderConfig.BinaryMerge && mediainfos.Any(m => m.DolbyVison == true))
@ -128,16 +151,9 @@ namespace N_m3u8DL_RE.DownloadManager
var data = File.ReadAllBytes(result.ActualFilePath); var data = File.ReadAllBytes(result.ActualFilePath);
currentKID = ReadInit(data); currentKID = ReadInit(data);
//从文件读取KEY //从文件读取KEY
var _key = await MP4DecryptUtil.SearchKeyFromFile(DownloaderConfig.KeyTextFile, currentKID); await SearchKeyAsync(currentKID);
if (_key != null)
{
if (DownloaderConfig.Keys == null)
DownloaderConfig.Keys = new string[] { _key };
else
DownloaderConfig.Keys = DownloaderConfig.Keys.Concat(new string[] { _key }).ToArray();
}
//实时解密 //实时解密
if (DownloaderConfig.MP4RealTimeDecryption && streamSpec.Playlist.MediaInit.EncryptInfo.Method != Common.Enum.EncryptMethod.NONE) if (DownloaderConfig.MP4RealTimeDecryption && streamSpec.Playlist.MediaInit.EncryptInfo.Method == Common.Enum.EncryptMethod.CENC)
{ {
var enc = result.ActualFilePath; var enc = result.ActualFilePath;
var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc)); var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
@ -174,8 +190,15 @@ namespace N_m3u8DL_RE.DownloadManager
FileDic[seg] = result; FileDic[seg] = result;
task.Increment(1); task.Increment(1);
//实时解密 //实时解密
if (DownloaderConfig.MP4RealTimeDecryption && seg.EncryptInfo.Method != Common.Enum.EncryptMethod.NONE && result != null) if (DownloaderConfig.MP4RealTimeDecryption && seg.EncryptInfo.Method == Common.Enum.EncryptMethod.CENC && result != null)
{ {
//读取init信息
if (string.IsNullOrEmpty(currentKID))
{
currentKID = ReadInit(result.ActualFilePath);
}
//从文件读取KEY
await SearchKeyAsync(currentKID);
var enc = result.ActualFilePath; var enc = result.ActualFilePath;
var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc)); var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
var dResult = await MP4DecryptUtil.DecryptAsync(DownloaderConfig.UseShakaPackager, mp4decrypt, DownloaderConfig.Keys, enc, dec, currentKID, mp4InitFile); var dResult = await MP4DecryptUtil.DecryptAsync(DownloaderConfig.UseShakaPackager, mp4decrypt, DownloaderConfig.Keys, enc, dec, currentKID, mp4InitFile);
@ -206,7 +229,7 @@ namespace N_m3u8DL_RE.DownloadManager
FileDic[seg] = result; FileDic[seg] = result;
task.Increment(1); task.Increment(1);
//实时解密 //实时解密
if (DownloaderConfig.MP4RealTimeDecryption && seg.EncryptInfo.Method != Common.Enum.EncryptMethod.NONE && result != null) if (DownloaderConfig.MP4RealTimeDecryption && seg.EncryptInfo.Method == Common.Enum.EncryptMethod.CENC && result != null)
{ {
var enc = result.ActualFilePath; var enc = result.ActualFilePath;
var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc)); var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
@ -457,21 +480,9 @@ namespace N_m3u8DL_RE.DownloadManager
//重新读取init信息 //重新读取init信息
if (mergeSuccess && totalCount >= 1 && string.IsNullOrEmpty(currentKID) && streamSpec.Playlist!.MediaParts.First().MediaSegments.First().EncryptInfo.Method == Common.Enum.EncryptMethod.CENC) if (mergeSuccess && totalCount >= 1 && string.IsNullOrEmpty(currentKID) && streamSpec.Playlist!.MediaParts.First().MediaSegments.First().EncryptInfo.Method == Common.Enum.EncryptMethod.CENC)
{ {
using (var fs = File.OpenRead(output)) currentKID = ReadInit(output);
{ //从文件读取KEY
var header = new byte[4096]; //4KB await SearchKeyAsync(currentKID);
fs.Read(header);
currentKID = ReadInit(header);
//从文件读取KEY
var _key = await MP4DecryptUtil.SearchKeyFromFile(DownloaderConfig.KeyTextFile, currentKID);
if (_key != null)
{
if (DownloaderConfig.Keys == null)
DownloaderConfig.Keys = new string[] { _key };
else
DownloaderConfig.Keys = DownloaderConfig.Keys.Concat(new string[] { _key }).ToArray();
}
}
} }
//调用mp4decrypt解密 //调用mp4decrypt解密