mirror of
https://github.com/SubtitleEdit/subtitleedit.git
synced 2024-11-26 05:02:36 +01:00
533 lines
19 KiB
C#
533 lines
19 KiB
C#
using Nikse.SubtitleEdit.Core.ContainerFormats;
|
|
using Nikse.SubtitleEdit.Core.ContainerFormats.Matroska;
|
|
using Nikse.SubtitleEdit.Core.ContainerFormats.Mp4;
|
|
using Nikse.SubtitleEdit.Core.TransportStream;
|
|
using Nikse.SubtitleEdit.Core.VobSub;
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.IO;
|
|
using System.Text;
|
|
using System.Text.RegularExpressions;
|
|
|
|
namespace Nikse.SubtitleEdit.Core
|
|
{
|
|
/// <summary>
|
|
/// File related utilities.
|
|
/// </summary>
|
|
public static class FileUtil
|
|
{
|
|
/// <summary>
|
|
/// Opens a binary file in read/write shared mode, reads the contents of the file into a
|
|
/// byte array, and then closes the file.
|
|
/// </summary>
|
|
/// <param name="path">The file to open for reading. </param>
|
|
/// <returns>A byte array containing the contents of the file.</returns>
|
|
public static byte[] ReadAllBytesShared(string path)
|
|
{
|
|
using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var index = 0;
|
|
var fileLength = fs.Length;
|
|
if (fileLength > int.MaxValue)
|
|
{
|
|
throw new IOException("File too long");
|
|
}
|
|
|
|
var count = (int)fileLength;
|
|
var bytes = new byte[count];
|
|
while (count > 0)
|
|
{
|
|
var n = fs.Read(bytes, index, count);
|
|
if (n == 0)
|
|
{
|
|
throw new InvalidOperationException("End of file reached before expected");
|
|
}
|
|
|
|
index += n;
|
|
count -= n;
|
|
}
|
|
return bytes;
|
|
}
|
|
}
|
|
|
|
public static List<string> ReadAllLinesShared(string path, Encoding encoding)
|
|
{
|
|
return encoding.GetString(ReadAllBytesShared(path)).SplitToLines();
|
|
}
|
|
|
|
public static string ReadAllTextShared(string path, Encoding encoding)
|
|
{
|
|
return encoding.GetString(ReadAllBytesShared(path));
|
|
}
|
|
|
|
public static bool IsZip(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[4];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return buffer[0] == 0x50 // P
|
|
&& buffer[1] == 0x4B // K
|
|
&& buffer[2] == 0x03 // (ETX)
|
|
&& buffer[3] == 0x04; // (EOT)
|
|
}
|
|
}
|
|
public static bool Is7Zip(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[6];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return buffer[0] == 0x37 // 7
|
|
&& buffer[1] == 0x7a // z
|
|
&& buffer[2] == 0xbc
|
|
&& buffer[3] == 0xaf
|
|
&& buffer[4] == 0x27
|
|
&& buffer[5] == 0x1c;
|
|
}
|
|
}
|
|
|
|
public static bool IsRar(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[4];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return buffer[0] == 0x52 // R
|
|
&& buffer[1] == 0x61 // a
|
|
&& buffer[2] == 0x72 // r
|
|
&& buffer[3] == 0x21; // !
|
|
}
|
|
}
|
|
|
|
public static bool IsPng(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[8];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return buffer[0] == 137
|
|
&& buffer[1] == 80
|
|
&& buffer[2] == 78
|
|
&& buffer[3] == 71
|
|
&& buffer[4] == 13
|
|
&& buffer[5] == 10
|
|
&& buffer[6] == 26
|
|
&& buffer[7] == 10;
|
|
}
|
|
}
|
|
|
|
public static bool IsSrr(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[3];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return buffer[0] == 0x69
|
|
&& buffer[1] == 0x69
|
|
&& buffer[2] == 0x69;
|
|
}
|
|
}
|
|
|
|
public static bool IsJpg(string fileName)
|
|
{
|
|
// jpeg header - always starts with FFD8 (Start Of Image marker) + FF + a uknown byte (most often E0 or E1 though)
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[3];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return buffer[0] == 0xFF
|
|
&& buffer[1] == 0xD8
|
|
&& buffer[2] == 0xFF;
|
|
}
|
|
}
|
|
|
|
public static bool IsTorrentFile(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[11];
|
|
fs.Read(buffer, 0, buffer.Length);
|
|
return Encoding.ASCII.GetString(buffer, 0, buffer.Length) == "d8:announce";
|
|
}
|
|
}
|
|
|
|
public static bool IsBluRaySup(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[2];
|
|
fs.Read(buffer, 0, buffer.Length);
|
|
return buffer[0] == 0x50 // P
|
|
&& buffer[1] == 0x47; // G
|
|
}
|
|
}
|
|
|
|
public static bool IsTransportStream(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[3761];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// allow for some random bytes in the beginning
|
|
for (int i = 0; i < 255; i++)
|
|
{
|
|
if (buffer[i] == Packet.SynchronizationByte && buffer[i + 188] == Packet.SynchronizationByte && buffer[i + 188 * 2] == Packet.SynchronizationByte)
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return buffer[0] == 0x54 && buffer[1] == 0x46 && buffer[2] == 0x72 && buffer[3760] == Packet.SynchronizationByte; // Topfield REC TS file
|
|
}
|
|
}
|
|
|
|
public static bool IsM2TransportStream(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var tsp = new TransportStreamParser();
|
|
tsp.DetectFormat(fs);
|
|
return tsp.IsM2TransportStream;
|
|
}
|
|
}
|
|
|
|
public static bool IsMpeg2PrivateStream2(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[4];
|
|
fs.Read(buffer, 0, buffer.Length);
|
|
return VobSubParser.IsPrivateStream2(buffer, 0);
|
|
}
|
|
}
|
|
|
|
public static bool IsVobSub(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[4];
|
|
fs.Read(buffer, 0, buffer.Length);
|
|
return VobSubParser.IsMpeg2PackHeader(buffer)
|
|
|| VobSubParser.IsPrivateStream1(buffer, 0);
|
|
}
|
|
}
|
|
|
|
public static bool IsSpDvdSup(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[SpHeader.SpHeaderLength];
|
|
if (fs.Read(buffer, 0, buffer.Length) != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var header = new SpHeader(buffer);
|
|
if (header.Identifier != "SP" || header.NextBlockPosition < 5)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
buffer = new byte[header.NextBlockPosition];
|
|
if (fs.Read(buffer, 0, buffer.Length) != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
buffer = new byte[SpHeader.SpHeaderLength];
|
|
if (fs.Read(buffer, 0, buffer.Length) != buffer.Length)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
header = new SpHeader(buffer);
|
|
return header.Identifier == "SP";
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks if file is an MXF file
|
|
/// </summary>
|
|
/// <param name="fileName">Input file</param>
|
|
/// <returns>true if file is an MXF file, otherwise false</returns>
|
|
public static bool IsMaterialExchangeFormat(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[65536];
|
|
var count = fs.Read(buffer, 0, buffer.Length);
|
|
if (count < 100)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
for (int i = 0; i < count - 11; i++)
|
|
{
|
|
//Header Partition PackId = 06 0E 2B 34 02 05 01 01 0D 01 02
|
|
if (buffer[i + 00] == 0x06 &&
|
|
buffer[i + 01] == 0x0E &&
|
|
buffer[i + 02] == 0x2B &&
|
|
buffer[i + 03] == 0x34 &&
|
|
buffer[i + 04] == 0x02 &&
|
|
buffer[i + 05] == 0x05 &&
|
|
buffer[i + 06] == 0x01 &&
|
|
buffer[i + 07] == 0x01 &&
|
|
buffer[i + 08] == 0x0D &&
|
|
buffer[i + 09] == 0x01 &&
|
|
buffer[i + 10] == 0x02)
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public static bool HasUtf8Bom(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
var buffer = new byte[3];
|
|
fs.Read(buffer, 0, buffer.Length);
|
|
return buffer[0] == 0xef && buffer[1] == 0xbb && buffer[2] == 0xbf;
|
|
}
|
|
}
|
|
|
|
public static bool IsSubtitleFileAllBinaryZeroes(string fileName)
|
|
{
|
|
using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
|
|
{
|
|
if (fs.Length < 10)
|
|
{
|
|
return false; // too short to be a proper subtitle file
|
|
}
|
|
|
|
int numberOfBytes = 1;
|
|
var buffer = new byte[1024];
|
|
while (numberOfBytes > 0)
|
|
{
|
|
numberOfBytes = fs.Read(buffer, 0, buffer.Length);
|
|
for (int i = 0; i < numberOfBytes; i++)
|
|
{
|
|
if (buffer[i] > 0)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
public static bool IsFile(string path)
|
|
{
|
|
if (!Path.IsPathRooted(path))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return ((File.GetAttributes(path) & FileAttributes.Directory) != FileAttributes.Directory);
|
|
}
|
|
|
|
public static bool IsDirectory(string path)
|
|
{
|
|
if (!Path.IsPathRooted(path))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return ((File.GetAttributes(path) & FileAttributes.Directory) == FileAttributes.Directory);
|
|
}
|
|
|
|
public static bool IsPlainText(string fileName)
|
|
{
|
|
var fileInfo = new FileInfo(fileName);
|
|
if (fileInfo.Length < 20)
|
|
{
|
|
return false; // too short to be plain text
|
|
}
|
|
|
|
if (fileInfo.Length > 5000000)
|
|
{
|
|
return false; // too large to be plain text
|
|
}
|
|
|
|
var enc = LanguageAutoDetect.GetEncodingFromFile(fileName);
|
|
var s = ReadAllTextShared(fileName, enc);
|
|
|
|
int numberCount = 0;
|
|
int letterCount = 0;
|
|
int len = s.Length;
|
|
|
|
for (int i = 0; i < len; i++)
|
|
{
|
|
var ch = s[i];
|
|
if (char.IsLetter(ch) || " -,.!?[]()\r\n".Contains(ch))
|
|
{
|
|
letterCount++;
|
|
}
|
|
else if (char.IsControl(ch) && ch != '\t') // binary found
|
|
{
|
|
return false;
|
|
}
|
|
else if (CharUtils.IsDigit(ch))
|
|
{
|
|
numberCount++;
|
|
}
|
|
}
|
|
if (len < 100)
|
|
{
|
|
return numberCount < 5 && letterCount > 20;
|
|
}
|
|
|
|
var numberPatternMatches = new Regex(@"\d+[.:,; -]\d+").Matches(s);
|
|
if (numberPatternMatches.Count > 30)
|
|
{
|
|
return false; // looks like time codes
|
|
}
|
|
|
|
var largeBlocksOfLargeNumbers = new Regex(@"\d{3,8}").Matches(s);
|
|
if (largeBlocksOfLargeNumbers.Count > 30)
|
|
{
|
|
return false; // looks like time codes
|
|
}
|
|
|
|
if (len < 1000 && largeBlocksOfLargeNumbers.Count > 10)
|
|
{
|
|
return false; // looks like time codes
|
|
}
|
|
|
|
var partsWithMoreThan100CharsOfNonNumbers = new Regex(@"[^\d]{150,100000}").Matches(s);
|
|
if (partsWithMoreThan100CharsOfNonNumbers.Count > 10)
|
|
{
|
|
return true; // looks like text
|
|
}
|
|
|
|
var numberThreshold = len * 0.015 + 25;
|
|
var letterThreshold = len * 0.8;
|
|
return numberCount < numberThreshold && letterCount > letterThreshold;
|
|
}
|
|
|
|
public static VideoInfo TryReadVideoInfoViaMatroskaHeader(string fileName)
|
|
{
|
|
var info = new VideoInfo { Success = false };
|
|
using (var matroska = new MatroskaFile(fileName))
|
|
{
|
|
if (matroska.IsValid)
|
|
{
|
|
matroska.GetInfo(out var frameRate, out var width, out var height, out var milliseconds, out var videoCodec);
|
|
|
|
info.Width = width;
|
|
info.Height = height;
|
|
info.FramesPerSecond = frameRate;
|
|
info.Success = true;
|
|
info.TotalMilliseconds = milliseconds;
|
|
info.TotalSeconds = milliseconds / TimeCode.BaseUnit;
|
|
info.TotalFrames = info.TotalSeconds * frameRate;
|
|
info.VideoCodec = videoCodec;
|
|
}
|
|
}
|
|
return info;
|
|
}
|
|
|
|
public static VideoInfo TryReadVideoInfoViaAviHeader(string fileName)
|
|
{
|
|
var info = new VideoInfo { Success = false };
|
|
|
|
try
|
|
{
|
|
using (var rp = new RiffParser())
|
|
{
|
|
if (rp.TryOpenFile(fileName) && rp.FileType == RiffParser.CkidAvi)
|
|
{
|
|
var dh = new RiffDecodeHeader(rp);
|
|
dh.ProcessMainAvi();
|
|
info.FileType = RiffParser.FromFourCc(rp.FileType);
|
|
info.Width = dh.Width;
|
|
info.Height = dh.Height;
|
|
info.FramesPerSecond = dh.FrameRate;
|
|
info.TotalFrames = dh.TotalFrames;
|
|
info.TotalMilliseconds = dh.TotalMilliseconds;
|
|
info.TotalSeconds = info.TotalMilliseconds / TimeCode.BaseUnit;
|
|
info.VideoCodec = dh.VideoHandler;
|
|
info.Success = true;
|
|
}
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
// ignored
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
public static VideoInfo TryReadVideoInfoViaMp4(string fileName)
|
|
{
|
|
var info = new VideoInfo { Success = false };
|
|
|
|
try
|
|
{
|
|
var mp4Parser = new MP4Parser(fileName);
|
|
if (mp4Parser.Moov != null && mp4Parser.VideoResolution.X > 0)
|
|
{
|
|
info.Width = mp4Parser.VideoResolution.X;
|
|
info.Height = mp4Parser.VideoResolution.Y;
|
|
info.TotalMilliseconds = mp4Parser.Duration.TotalSeconds;
|
|
info.VideoCodec = "MP4";
|
|
info.FramesPerSecond = mp4Parser.FrameRate;
|
|
info.Success = true;
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
// ignored
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
public static string GetTempFileName (string extension)
|
|
{
|
|
return Path.GetTempPath() + Guid.NewGuid() + extension;
|
|
}
|
|
|
|
}
|
|
}
|