mirror of
https://github.com/SubtitleEdit/subtitleedit.git
synced 2024-11-26 05:02:36 +01:00
460 lines
17 KiB
C#
460 lines
17 KiB
C#
using System;
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using System.Drawing;
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using System.IO;
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using System.Text;
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namespace Nikse.SubtitleEdit.Core.VobSub
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{
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public class VobSubWriter : IDisposable
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{
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private class MemWriter
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{
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private readonly byte[] _buf;
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private long _pos;
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public MemWriter(long size)
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{
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_buf = new byte[size];
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_pos = 0;
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}
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public byte[] GetBuf()
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{
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return _buf;
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}
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public long GetPosition()
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{
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return _pos;
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}
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public void GotoBegin()
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{
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_pos = 0;
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}
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public void WriteByte(byte val)
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{
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_buf[_pos++] = val;
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}
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}
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private readonly string _subFileName;
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private FileStream _subFile;
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private readonly StringBuilder _idx;
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private readonly int _screenWidth;
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private readonly int _screenHeight;
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private readonly int _bottomMargin;
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private readonly int _leftRightMargin;
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private readonly int _languageStreamId;
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private readonly Color _background = Color.Transparent;
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private readonly Color _pattern;
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private readonly Color _emphasis1;
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private readonly bool _useInnerAntiAliasing;
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private Color _emphasis2 = Color.FromArgb(240, Color.Black);
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private readonly string _languageName;
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private readonly string _languageNameShort;
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public VobSubWriter(string subFileName, int screenWidth, int screenHeight, int bottomMargin, int leftRightMargin, int languageStreamId, Color pattern, Color emphasis1, bool useInnerAntiAliasing, DvdSubtitleLanguage language)
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{
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_subFileName = subFileName;
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_screenWidth = screenWidth;
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_screenHeight = screenHeight;
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_bottomMargin = bottomMargin;
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_leftRightMargin = leftRightMargin;
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_languageStreamId = languageStreamId;
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_pattern = pattern;
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_emphasis1 = emphasis1;
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_useInnerAntiAliasing = useInnerAntiAliasing;
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_languageName = language.NativeName;
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_languageNameShort = language.Code;
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_idx = CreateIdxHeader();
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_subFile = new FileStream(subFileName, FileMode.Create);
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}
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public static void WriteEndianWord(int i, Stream stream)
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{
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stream.WriteByte((byte)(i / 256));
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stream.WriteByte((byte)(i % 256));
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}
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private byte[] GetSubImageBuffer(RunLengthTwoParts twoPartBuffer, NikseBitmap nbmp, Paragraph p, ContentAlignment alignment, Point? overridePosition)
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{
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var ms = new MemoryStream();
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// sup picture data size
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WriteEndianWord(twoPartBuffer.Length + 34, ms);
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// first display control sequence table address
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int startDisplayControlSequenceTableAddress = twoPartBuffer.Length + 4;
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WriteEndianWord(startDisplayControlSequenceTableAddress, ms);
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// Write image
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const int imageTopFieldDataAddress = 4;
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ms.Write(twoPartBuffer.Buffer1, 0, twoPartBuffer.Buffer1.Length);
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int imageBottomFieldDataAddress = 4 + twoPartBuffer.Buffer1.Length;
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ms.Write(twoPartBuffer.Buffer2, 0, twoPartBuffer.Buffer2.Length);
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// Write zero delay
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ms.WriteByte(0);
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ms.WriteByte(0);
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// next display control sequence table address (use current is last)
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WriteEndianWord(startDisplayControlSequenceTableAddress + 24, ms); // start of display control sequence table address
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// Control command start
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ms.WriteByte(p.Forced ? (byte)0 : (byte)1);
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// Control command 3 = SetColor
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WriteColors(ms); // 3 bytes
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// Control command 4 = SetContrast
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WriteContrast(ms); // 3 bytes
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// Control command 5 = SetDisplayArea
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WriteDisplayArea(ms, nbmp, alignment, overridePosition); // 7 bytes
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// Control command 6 = SetPixelDataAddress
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WritePixelDataAddress(ms, imageTopFieldDataAddress, imageBottomFieldDataAddress); // 5 bytes
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// Control command exit
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ms.WriteByte(255); // 1 byte
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// Control Sequence Table
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// Write delay - subtitle duration
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WriteEndianWord(Convert.ToInt32(p.Duration.TotalMilliseconds * 90.0) >> 10, ms);
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// next display control sequence table address (use current is last)
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WriteEndianWord(startDisplayControlSequenceTableAddress + 24, ms); // start of display control sequence table address
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// Control command 2 = StopDisplay
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ms.WriteByte(2);
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// extra byte - for compatibility with gpac/MP4BOX
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ms.WriteByte(255); // 1 byte
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return ms.ToArray();
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}
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public void WriteParagraph(Paragraph p, Bitmap bmp, ContentAlignment alignment, Point? overridePosition = null) // inspired by code from SubtitleCreator
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{
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// timestamp: 00:00:33:900, filepos: 000000000
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_idx.AppendLine($"timestamp: {p.StartTime.Hours:00}:{p.StartTime.Minutes:00}:{p.StartTime.Seconds:00}:{p.StartTime.Milliseconds:000}, filepos: {_subFile.Position.ToString("X").PadLeft(9, '0').ToLowerInvariant()}");
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var nbmp = new NikseBitmap(bmp);
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_emphasis2 = nbmp.ConvertToFourColors(_background, _pattern, _emphasis1, _useInnerAntiAliasing);
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var twoPartBuffer = nbmp.RunLengthEncodeForDvd(_background, _pattern, _emphasis1, _emphasis2);
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var imageBuffer = GetSubImageBuffer(twoPartBuffer, nbmp, p, alignment, overridePosition);
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int bufferIndex = 0;
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byte vobSubId = (byte)_languageStreamId;
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var mwsub = new MemWriter(200000);
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byte[] subHeader = new byte[30];
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byte[] ts = new byte[4];
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// Lent from "Son2VobSub" by Alain Vielle and Petr Vyskocil
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// And also from Sup2VobSub by Emmel
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subHeader[0] = 0x00; // MPEG 2 PACK HEADER
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subHeader[1] = 0x00;
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subHeader[2] = 0x01;
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subHeader[3] = 0xba;
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subHeader[4] = 0x44;
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subHeader[5] = 0x02;
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subHeader[6] = 0xc4;
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subHeader[7] = 0x82;
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subHeader[8] = 0x04;
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subHeader[9] = 0xa9;
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subHeader[10] = 0x01;
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subHeader[11] = 0x89;
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subHeader[12] = 0xc3;
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subHeader[13] = 0xf8;
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subHeader[14] = 0x00; // PES
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subHeader[15] = 0x00;
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subHeader[16] = 0x01;
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subHeader[17] = 0xbd;
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int packetSize = imageBuffer.Length;
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long toWrite = packetSize; // Image buffer + control sequence length
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bool header0 = true;
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while (toWrite > 0)
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{
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long headerSize;
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if (header0)
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{
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header0 = false;
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// This is only for first packet
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subHeader[20] = 0x81; // mark as original
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subHeader[21] = 0x80; // first packet: PTS
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subHeader[22] = 0x05; // PES header data length
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// PTS (90kHz):
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//--------------
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subHeader[23] = (byte)((ts[3] & 0xc0) >> 5 | 0x21);
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subHeader[24] = (byte)((ts[3] & 0x3f) << 2 | (ts[2] & 0xc0) >> 6);
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subHeader[25] = (byte)((ts[2] & 0x3f) << 2 | (ts[1] & 0x80) >> 6 | 0x01);
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subHeader[26] = (byte)((ts[1] & 0x7f) << 1 | (ts[0] & 0x80) >> 7);
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subHeader[27] = (byte)((ts[0] & 0x7f) << 1 | 0x01);
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const string pre = "0010"; // 0011 or 0010 ? (KMPlayer will not understand 0011!!!)
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long newPts = (long)(p.StartTime.TotalSeconds * 90000.0);
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string bString = Convert.ToString(newPts, 2).PadLeft(33, '0');
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string fiveBytesString = pre + bString.Substring(0, 3) + "1" + bString.Substring(3, 15) + "1" + bString.Substring(18, 15) + "1";
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for (int i = 0; i < 5; i++)
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{
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subHeader[23 + i] = Convert.ToByte(fiveBytesString.Substring(i * 8, 8), 2);
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}
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subHeader[28] = vobSubId;
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headerSize = 29;
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}
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else
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{
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subHeader[20] = 0x81; // mark as original
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subHeader[21] = 0x00; // no PTS
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subHeader[22] = 0x00; // header data length
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subHeader[23] = vobSubId;
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headerSize = 24;
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}
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if ((toWrite + headerSize) <= 0x800)
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{
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// write whole image in one 0x800 part
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long j = (headerSize - 20) + toWrite;
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subHeader[18] = (byte)(j / 0x100);
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subHeader[19] = (byte)(j % 0x100);
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// First Write header
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for (int x = 0; x < headerSize; x++)
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{
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mwsub.WriteByte(subHeader[x]);
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}
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// Write Image Data
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for (int x = 0; x < toWrite; x++)
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{
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mwsub.WriteByte(imageBuffer[bufferIndex++]);
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}
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// Pad remaining space
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long paddingSize = 0x800 - headerSize - toWrite;
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for (int x = 0; x < paddingSize; x++)
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{
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mwsub.WriteByte(0xff);
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}
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toWrite = 0;
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}
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else
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{
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// write multiple parts
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long blockSize = 0x800 - headerSize;
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long j = (headerSize - 20) + blockSize;
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subHeader[18] = (byte)(j / 0x100);
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subHeader[19] = (byte)(j % 0x100);
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// First Write header
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for (int x = 0; x < headerSize; x++)
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{
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mwsub.WriteByte(subHeader[x]);
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}
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// Write Image Data
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for (int x = 0; x < blockSize; x++)
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{
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mwsub.WriteByte(imageBuffer[bufferIndex++]);
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}
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toWrite -= blockSize;
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}
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}
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// Write whole memory stream to file
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long endPosition = mwsub.GetPosition();
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mwsub.GotoBegin();
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_subFile.Write(mwsub.GetBuf(), 0, (int)endPosition);
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}
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private static void WritePixelDataAddress(Stream stream, int imageTopFieldDataAddress, int imageBottomFieldDataAddress)
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{
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stream.WriteByte(6);
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WriteEndianWord(imageTopFieldDataAddress, stream);
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WriteEndianWord(imageBottomFieldDataAddress, stream);
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}
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private void WriteDisplayArea(Stream stream, NikseBitmap nbmp, ContentAlignment alignment, Point? overridePosition)
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{
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stream.WriteByte(5);
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// Write 6 bytes of area - starting X, ending X, starting Y, ending Y, each 12 bits
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ushort startX = (ushort)((_screenWidth - nbmp.Width) / 2);
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ushort startY = (ushort)(_screenHeight - nbmp.Height - _bottomMargin);
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if (alignment == ContentAlignment.TopLeft || alignment == ContentAlignment.TopCenter || alignment == ContentAlignment.TopRight)
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{
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startY = (ushort)_bottomMargin;
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}
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if (alignment == ContentAlignment.MiddleLeft || alignment == ContentAlignment.MiddleCenter || alignment == ContentAlignment.MiddleRight)
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{
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startY = (ushort)(_screenHeight / 2 - nbmp.Height / 2);
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}
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if (alignment == ContentAlignment.TopLeft || alignment == ContentAlignment.MiddleLeft || alignment == ContentAlignment.BottomLeft)
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{
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startX = (ushort)_leftRightMargin;
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}
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if (alignment == ContentAlignment.TopRight || alignment == ContentAlignment.MiddleRight || alignment == ContentAlignment.BottomRight)
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{
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startX = (ushort)(_screenWidth - nbmp.Width - _leftRightMargin);
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}
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if (overridePosition != null &&
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overridePosition.Value.X >= 0 && overridePosition.Value.X < _screenWidth &&
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overridePosition.Value.Y >= 0 && overridePosition.Value.Y < _screenHeight)
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{
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startX = (ushort)overridePosition.Value.X;
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startY = (ushort)overridePosition.Value.Y;
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}
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ushort endX = (ushort)(startX + nbmp.Width - 1);
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ushort endY = (ushort)(startY + nbmp.Height - 1);
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WriteEndianWord((ushort)(startX << 4 | endX >> 8), stream); // 16 - 12 start x + 4 end x
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WriteEndianWord((ushort)(endX << 8 | startY >> 4), stream); // 16 - 8 endx + 8 starty
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WriteEndianWord((ushort)(startY << 12 | endY), stream); // 16 - 4 start y + 12 end y
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}
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/// <summary>
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/// Directly provides the four contrast (alpha blend) values to associate with the four pixel values. One nibble per pixel value for a total of 2 bytes. 0x0 = transparent, 0xF = opaque
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/// </summary>
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private void WriteContrast(Stream stream)
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{
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stream.WriteByte(4);
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stream.WriteByte((byte)((_emphasis2.A << 4) | _emphasis1.A)); // emphasis2 + emphasis1
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stream.WriteByte((byte)((_pattern.A << 4) | _background.A)); // pattern + background
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}
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/// <summary>
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/// provides four indices into the CLUT for the current PGC to associate with the four pixel values. One nibble per pixel value for a total of 2 bytes.
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/// </summary>
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private static void WriteColors(Stream stream)
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{
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// Index to palette
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const byte emphasis2 = 3;
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const byte emphasis1 = 2;
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const byte pattern = 1;
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const byte background = 0;
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stream.WriteByte(3);
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stream.WriteByte((emphasis2 << 4) | emphasis1); // emphasis2 + emphasis1
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stream.WriteByte((pattern << 4) | background); // pattern + background
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}
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public void WriteIdxFile()
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{
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string idxFileName = _subFileName.Substring(0, _subFileName.Length - 3) + "idx";
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File.WriteAllText(idxFileName, _idx.ToString().Trim());
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}
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private StringBuilder CreateIdxHeader()
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{
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var sb = new StringBuilder();
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sb.AppendLine(@"# VobSub index file, v7 (do not modify this line!)
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#
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# To repair desynchronization, you can insert gaps this way:
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# (it usually happens after vob id changes)
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#
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# delay: [sign]hh:mm:ss:ms
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#
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# Where:
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# [sign]: +, - (optional)
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# hh: hours (0 <= hh)
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# mm/ss: minutes/seconds (0 <= mm/ss <= 59)
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# ms: milliseconds (0 <= ms <= 999)
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#
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# Note: You can't position a sub before the previous with a negative value.
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#
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# You can also modify timestamps or delete a few subs you don't like.
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# Just make sure they stay in increasing order.
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# Settings
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# Original frame size
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size: " + _screenWidth + "x" + _screenHeight + @"
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# Origin, relative to the upper-left corner, can be overloaded by aligment
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org: 0, 0
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# Image scaling (hor,ver), origin is at the upper-left corner or at the alignment coord (x, y)
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scale: 100%, 100%
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# Alpha blending
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alpha: 100%
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# Smoothing for very blocky images (use OLD for no filtering)
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smooth: OFF
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# In milliseconds
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fadein/out: 50, 50
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# Force subtitle placement relative to (org.x, org.y)
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align: OFF at LEFT TOP
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# For correcting non-progressive desync. (in milliseconds or hh:mm:ss:ms)
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# Note: Not effective in DirectVobSub, use 'delay: ... ' instead.
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time offset: 0
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# ON: displays only forced subtitles, OFF: shows everything
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forced subs: OFF
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# The original palette of the DVD
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palette: 000000, " + ToHexColor(_pattern) + ", " + ToHexColor(_emphasis1) + ", " + ToHexColor(_emphasis2) + @", 828282, 828282, 828282, ffffff, 828282, bababa, 828282, 828282, 828282, 828282, 828282, 828282
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# Custom colors (transp idxs and the four colors)
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custom colors: OFF, tridx: 0000, colors: 000000, 000000, 000000, 000000
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# Language index in use
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langidx: 0
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# " + _languageName + @"
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id: " + _languageNameShort + @", index: 0
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# Decomment next line to activate alternative name in DirectVobSub / Windows Media Player 6.x
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# alt: " + _languageName + @"
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# Vob/Cell ID: 1, 1 (PTS: 0)");
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return sb;
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}
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private static string ToHexColor(Color c)
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{
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return (c.R.ToString("X2") + c.G.ToString("X2") + c.B.ToString("X2")).ToLowerInvariant();
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}
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private void ReleaseManagedResources()
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{
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if (_subFile != null)
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{
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_subFile.Dispose();
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_subFile = null;
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}
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}
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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protected virtual void Dispose(bool disposing)
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{
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if (disposing)
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{
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ReleaseManagedResources();
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}
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}
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}
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}
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