mirror of
https://github.com/SubtitleEdit/subtitleedit.git
synced 2024-10-28 15:02:35 +01:00
258 lines
10 KiB
C#
258 lines
10 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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namespace Nikse.SubtitleEdit.Core.SubtitleFormats
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{
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public class NciCaption : SubtitleFormat
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{
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public override string Extension
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{
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get { return ".cap"; }
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}
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public const string NameOfFormat = "NCI Caption";
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public override string Name
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{
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get { return NameOfFormat; }
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}
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public override bool IsTimeBased
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{
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get { return true; }
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}
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public static void Save(string fileName)
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{
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using (var fs = new FileStream(fileName, FileMode.Create, FileAccess.Write))
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{
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//...
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}
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}
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public override bool IsMine(List<string> lines, string fileName)
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{
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if (!string.IsNullOrEmpty(fileName) && File.Exists(fileName))
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{
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var fi = new FileInfo(fileName);
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if (fi.Length >= 640 && fi.Length < 1024000) // not too small or too big
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{
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if (fileName.EndsWith(".cap", StringComparison.OrdinalIgnoreCase))
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{
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byte[] buffer = FileUtil.ReadAllBytesShared(fileName);
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return ((buffer[0] == 0x43 && // CAPT.2.0
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buffer[1] == 0x41 &&
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buffer[2] == 0x50 &&
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buffer[3] == 0x54 &&
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buffer[4] == 0x00 &&
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buffer[5] == 0x32 &&
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buffer[6] == 0x2e &&
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buffer[7] == 0x30) ||
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(buffer[0] == 0x43 && // CAPT.1.2
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buffer[1] == 0x41 &&
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buffer[2] == 0x50 &&
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buffer[3] == 0x54 &&
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buffer[4] == 0x00 &&
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buffer[5] == 0x31 &&
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buffer[6] == 0x2e &&
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buffer[7] == 0x32));
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}
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}
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}
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return false;
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}
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public override string ToText(Subtitle subtitle, string title)
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{
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return "Not supported!";
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}
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private static TimeCode DecodeTimeCode(byte[] buffer, int index)
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{
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int hour = buffer[index];
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int minutes = buffer[index + 1];
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int seconds = buffer[index + 2];
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int frames = buffer[index + 3];
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int milliseconds = (int)(TimeCode.BaseUnit / Configuration.Settings.General.CurrentFrameRate * frames);
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if (milliseconds > 999)
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milliseconds = 999;
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return new TimeCode(hour, minutes, seconds, milliseconds);
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}
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public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
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{
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_errorCount = 0;
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subtitle.Paragraphs.Clear();
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subtitle.Header = null;
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byte[] buffer = FileUtil.ReadAllBytesShared(fileName);
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string title = Encoding.ASCII.GetString(buffer, 82, 66);
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int i = 128;
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var encoding = Encoding.GetEncoding(1252);
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while (i < buffer.Length - 66)
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{
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if (buffer[i] == 0xff && buffer[i + 1] == 0xff && buffer[i + 3] != 0xff && buffer[i - 1] != 0xff && buffer[i + 64] == 0xff && buffer[i + 65] == 0xff)
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{
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var p = new Paragraph();
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var sb = new StringBuilder();
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int j = i + 4;
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while (j < i + 64)
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{
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if (buffer[j] == 0)
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{
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break;
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}
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else if (buffer[j] == 0xd)
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{
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sb.AppendLine();
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j += 3;
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}
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else if (buffer[j] == 0x87)
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{
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sb.Append('♪');
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j++;
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}
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else
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{
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sb.Append(encoding.GetString(buffer, j, 1));
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j++;
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}
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}
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p.Text = sb.ToString();
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subtitle.Paragraphs.Add(p);
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i += 62;
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}
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else
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{
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i++;
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}
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}
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subtitle.Renumber();
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if (buffer[0] == 0x43 && // CAPT.1.2
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buffer[1] == 0x41 &&
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buffer[2] == 0x50 &&
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buffer[3] == 0x54 &&
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buffer[4] == 0x00 &&
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buffer[5] == 0x31 &&
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buffer[6] == 0x2e &&
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buffer[7] == 0x32)
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{
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i = 396;
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int start = i;
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int number = 0;
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while (i < buffer.Length - 66)
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{
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if (buffer[i] == 0xff && buffer[i + 1] == 0xff && buffer[i + 2] != 0xff && buffer[i + 28] == 0xff && buffer[i + 29] == 0xff && buffer[i + 30] != 0xff)
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{
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if (buffer[i + 14] == number + 1)
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{
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Paragraph p = subtitle.GetParagraphOrDefault(number);
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if (p != null)
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{
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p.StartTime = DecodeTimeCode(buffer, i + 18);
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p.EndTime = DecodeTimeCode(buffer, i + 22);
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number++;
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}
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i += 25;
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}
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}
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i++;
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}
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}
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else
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{
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i = 230;
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int countTimecodes = 0;
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int start = i;
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int lastNumber = -1;
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while (i < buffer.Length - 66)
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{
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if (buffer[i] == 0xff && buffer[i + 1] == 0xff && buffer[i + 2] == 0xff && buffer[i + 3] == 0xff)
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{
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int length = i - start - 2;
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if (length >= 10)
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{
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int count = length / 14;
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if (length % 14 == 10)
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{
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count++;
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}
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else
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{
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//System.Windows.Forms.MessageBox.Show("Problem at with a length of " + length.ToString() + " at file position " + (i + 2) + " which gives remainer: " + (length % 14));
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if (length % 14 == 8)
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count++;
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}
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for (int k = 0; k < count; k++)
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{
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int index = start + 2 + (14 * k);
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int number = buffer[index] + buffer[index + 1] * 256;
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if (number != lastNumber + 1)
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{
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int tempNumber = buffer[index - 2] + buffer[index - 1] * 256;
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if (tempNumber == lastNumber + 1)
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{
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index -= 2;
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number = tempNumber;
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}
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}
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if (number > lastNumber)
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{
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lastNumber = number;
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Paragraph p = subtitle.GetParagraphOrDefault(number);
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if (p != null)
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{
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if (k < count - 1)
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{
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p.StartTime = DecodeTimeCode(buffer, index + 6);
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p.EndTime = DecodeTimeCode(buffer, index + 10);
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}
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else
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{
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p.StartTime = DecodeTimeCode(buffer, index + 6);
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}
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countTimecodes++;
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}
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}
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}
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}
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start = i + 2;
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i += 5;
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}
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i++;
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}
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}
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for (i = 0; i < subtitle.Paragraphs.Count; i++)
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{
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Paragraph p = subtitle.GetParagraphOrDefault(i);
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Paragraph next = subtitle.GetParagraphOrDefault(i + 1);
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if (next != null && p.EndTime.TotalMilliseconds == 0)
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p.EndTime.TotalMilliseconds = next.StartTime.TotalMilliseconds - 1;
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}
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for (i = 0; i < subtitle.Paragraphs.Count; i++)
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{
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Paragraph p = subtitle.GetParagraphOrDefault(i);
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Paragraph next = subtitle.GetParagraphOrDefault(i + 1);
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if (p.Duration.TotalMilliseconds <= 0 && next != null)
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p.EndTime.TotalMilliseconds = next.StartTime.TotalMilliseconds - 1;
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}
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subtitle.RemoveEmptyLines();
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Paragraph last = subtitle.GetParagraphOrDefault(subtitle.Paragraphs.Count - 1);
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if (last != null)
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last.EndTime.TotalMilliseconds = last.StartTime.TotalMilliseconds + Utilities.GetOptimalDisplayMilliseconds(last.Text);
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subtitle.Renumber();
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}
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}
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}
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