mirror of
https://mirror.ghproxy.com/https://github.com/dexyfex/CodeWalker
synced 2024-07-02 16:01:27 +08:00
1878 lines
66 KiB
C#
1878 lines
66 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.Compression;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Text.RegularExpressions;
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/*
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Shamelessly stolen and mangled from:
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https://github.com/hamish-milne/FbxWriter
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Under GPL license, for full terms see the above link.
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Copyright (c) 2015 Hamish Milne
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"An FBX library for .NET"
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*/
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namespace CodeWalker
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{
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/// <summary>
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/// Static read and write methods
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/// </summary>
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public static class FbxIO
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{
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/// <summary>
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/// Read binary or ASCII FBX from memory. Decides which based on the header.
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/// (This method added by dexyfex)
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/// </summary>
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/// <param name="data">FBX byte array.</param>
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/// <returns></returns>
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public static FbxDocument Read(byte[] data)
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{
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using (var stream = new MemoryStream(data))
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{
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var isbinary = FbxBinary.IsBinary(stream);
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if (isbinary)
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{
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var reader = new FbxBinaryReader(stream);
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return reader.Read();
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}
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else //try ASCII
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{
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var reader = new FbxAsciiReader(stream);
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return reader.Read();
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}
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}
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}
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/// <summary>
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/// Reads a binary FBX file
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/// </summary>
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/// <param name="path"></param>
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/// <returns>The top level document node</returns>
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public static FbxDocument ReadBinary(string path)
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{
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if (path == null)
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throw new ArgumentNullException(nameof(path));
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using (var stream = new FileStream(path, FileMode.Open))
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{
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var reader = new FbxBinaryReader(stream);
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return reader.Read();
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}
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}
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/// <summary>
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/// Reads an ASCII FBX file
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/// </summary>
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/// <param name="path"></param>
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/// <returns>The top level document node</returns>
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public static FbxDocument ReadAscii(string path)
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{
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if (path == null)
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throw new ArgumentNullException(nameof(path));
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using (var stream = new FileStream(path, FileMode.Open))
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{
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var reader = new FbxAsciiReader(stream);
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return reader.Read();
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}
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}
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/// <summary>
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/// Writes an FBX document
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/// </summary>
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/// <param name="document">The top level document node</param>
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/// <param name="path"></param>
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public static void WriteBinary(FbxDocument document, string path)
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{
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if (path == null)
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throw new ArgumentNullException(nameof(path));
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using (var stream = new FileStream(path, FileMode.Create))
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{
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var writer = new FbxBinaryWriter(stream);
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writer.Write(document);
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}
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}
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/// <summary>
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/// Writes an FBX document
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/// </summary>
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/// <param name="document">The top level document node</param>
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/// <param name="path"></param>
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public static void WriteAscii(FbxDocument document, string path)
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{
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if (path == null)
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throw new ArgumentNullException(nameof(path));
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using (var stream = new FileStream(path, FileMode.Create))
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{
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var writer = new FbxAsciiWriter(stream);
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writer.Write(document);
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}
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}
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}
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/// <summary>
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/// Reads FBX nodes from a text stream
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/// </summary>
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public class FbxAsciiReader
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{
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private readonly Stream stream;
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private readonly FbxErrorLevel errorLevel;
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private int line = 1;
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private int column = 1;
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/// <summary>
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/// Creates a new reader
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/// </summary>
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/// <param name="stream"></param>
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/// <param name="errorLevel"></param>
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public FbxAsciiReader(Stream stream, FbxErrorLevel errorLevel = FbxErrorLevel.Checked)
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{
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if (stream == null)
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throw new ArgumentNullException(nameof(stream));
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this.stream = stream;
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this.errorLevel = errorLevel;
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}
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/// <summary>
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/// The maximum array size that will be allocated
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/// </summary>
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/// <remarks>
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/// If you trust the source, you can expand this value as necessary.
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/// Malformed files could cause large amounts of memory to be allocated
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/// and slow or crash the system as a result.
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/// </remarks>
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public int MaxArrayLength { get; set; } = (1 << 24);
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// We read bytes a lot, so we should make a more efficient method here
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// (The normal one makes a new byte array each time)
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readonly byte[] singleChar = new byte[1];
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private char? prevChar;
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private bool endStream;
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private bool wasCr;
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// Reads a char, allows peeking and checks for end of stream
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char ReadChar()
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{
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if (prevChar != null)
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{
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var c = prevChar.Value;
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prevChar = null;
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return c;
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}
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if (stream.Read(singleChar, 0, 1) < 1)
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{
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endStream = true;
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return '\0';
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}
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var ch = (char)singleChar[0];
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// Handle line and column numbers here;
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// This isn't terribly accurate, but good enough for diagnostics
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if (ch == '\r')
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{
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wasCr = true;
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line++;
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column = 0;
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}
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else
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{
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if (ch == '\n' && !wasCr)
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{
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line++;
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column = 0;
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}
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wasCr = false;
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}
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column++;
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return ch;
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}
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// Checks if a character is valid in a real number
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static bool IsDigit(char c, bool first)
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{
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if (char.IsDigit(c))
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return true;
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switch (c)
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{
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case '-':
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case '+':
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return true;
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case '.':
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case 'e':
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case 'E':
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case 'X':
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case 'x':
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return !first;
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}
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return false;
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}
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static bool IsLineEnd(char c)
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{
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return c == '\r' || c == '\n';
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}
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// Token to mark the end of the stream
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class EndOfStream
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{
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public override string ToString()
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{
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return "end of stream";
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}
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}
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// Wrapper around a string to mark it as an identifier
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// (as opposed to a string literal)
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class Identifier
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{
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public readonly string String;
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public override bool Equals(object obj)
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{
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var id = obj as Identifier;
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if (id != null)
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return String == id.String;
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return false;
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}
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public override int GetHashCode()
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{
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return String?.GetHashCode() ?? 0;
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}
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public Identifier(string str)
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{
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String = str;
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}
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public override string ToString()
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{
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return String + ":";
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}
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}
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private object prevTokenSingle;
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// Reads a single token, allows peeking
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// Can return 'null' for a comment or whitespace
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object ReadTokenSingle()
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{
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if (prevTokenSingle != null)
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{
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var ret = prevTokenSingle;
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prevTokenSingle = null;
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return ret;
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}
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var c = ReadChar();
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if (endStream)
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return new EndOfStream();
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switch (c)
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{
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case ';': // Comments
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while (!IsLineEnd(ReadChar()) && !endStream) { } // Skip a line
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return null;
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case '{': // Operators
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case '}':
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case '*':
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case ':':
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case ',':
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return c;
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case '"': // String literal
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var sb1 = new StringBuilder();
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while ((c = ReadChar()) != '"')
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{
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if (endStream)
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throw new FbxException(line, column,
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"Unexpected end of stream; expecting end quote");
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sb1.Append(c);
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}
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return sb1.ToString();
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default:
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if (char.IsWhiteSpace(c))
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{
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// Merge whitespace
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while (char.IsWhiteSpace(c = ReadChar()) && !endStream) { }
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if (!endStream)
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prevChar = c;
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return null;
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}
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if (IsDigit(c, true)) // Number
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{
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var sb2 = new StringBuilder();
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do
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{
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sb2.Append(c);
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c = ReadChar();
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} while (IsDigit(c, false) && !endStream);
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if (!endStream)
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prevChar = c;
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var str = sb2.ToString();
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if (str.Contains("."))
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{
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if (str.Split('.', 'e', 'E')[1].Length > 6)
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{
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double d;
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if (!double.TryParse(str, out d))
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throw new FbxException(line, column,
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"Invalid number");
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return d;
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}
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else
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{
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float f;
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if (!float.TryParse(str, out f))
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throw new FbxException(line, column,
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"Invalid number");
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return f;
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}
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}
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long l;
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if (!long.TryParse(str, out l))
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throw new FbxException(line, column,
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"Invalid integer");
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// Check size and return the smallest possible
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if (l >= byte.MinValue && l <= byte.MaxValue)
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return (byte)l;
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if (l >= int.MinValue && l <= int.MaxValue)
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return (int)l;
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return l;
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}
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if (char.IsLetter(c) || c == '_') // Identifier
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{
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var sb3 = new StringBuilder();
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do
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{
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sb3.Append(c);
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c = ReadChar();
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} while ((char.IsLetterOrDigit(c) || c == '_') && !endStream);
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if (!endStream)
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prevChar = c;
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return new Identifier(sb3.ToString());
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}
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break;
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}
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throw new FbxException(line, column,
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"Unknown character " + c);
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}
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private object prevToken;
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// Use a loop rather than recursion to prevent stack overflow
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// Here we can also merge string+colon into an identifier,
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// returning single-character bare strings (for C-type properties)
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object ReadToken()
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{
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object ret;
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if (prevToken != null)
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{
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ret = prevToken;
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prevToken = null;
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return ret;
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}
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do
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{
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ret = ReadTokenSingle();
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} while (ret == null);
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var id = ret as Identifier;
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if (id != null)
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{
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object colon;
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do
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{
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colon = ReadTokenSingle();
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} while (colon == null);
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if (!':'.Equals(colon))
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{
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if (id.String.Length > 1)
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throw new FbxException(line, column,
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"Unexpected '" + colon + "', expected ':' or a single-char literal");
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ret = id.String[0];
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prevTokenSingle = colon;
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}
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}
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return ret;
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}
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void ExpectToken(object token)
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{
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var t = ReadToken();
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if (!token.Equals(t))
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throw new FbxException(line, column,
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"Unexpected '" + t + "', expected " + token);
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}
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private enum ArrayType
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{
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Byte = 0,
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Int = 1,
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Long = 2,
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Float = 3,
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Double = 4,
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};
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Array ReadArray()
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{
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// Read array length and header
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var len = ReadToken();
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long l;
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if (len is long)
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l = (long)len;
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else if (len is int)
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l = (int)len;
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else if (len is byte)
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l = (byte)len;
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else
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throw new FbxException(line, column,
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"Unexpected '" + len + "', expected an integer");
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if (l < 0)
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throw new FbxException(line, column,
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"Invalid array length " + l);
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if (l > MaxArrayLength)
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throw new FbxException(line, column,
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"Array length " + l + " higher than permitted maximum " + MaxArrayLength);
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ExpectToken('{');
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ExpectToken(new Identifier("a"));
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var array = new double[l];
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// Read array elements
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bool expectComma = false;
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object token;
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var arrayType = ArrayType.Byte;
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long pos = 0;
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while (!'}'.Equals(token = ReadToken()))
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{
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if (expectComma)
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{
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if (!','.Equals(token))
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throw new FbxException(line, column,
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"Unexpected '" + token + "', expected ','");
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expectComma = false;
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continue;
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}
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if (pos >= array.Length)
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{
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if (errorLevel >= FbxErrorLevel.Checked)
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throw new FbxException(line, column,
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"Too many elements in array");
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continue;
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}
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// Add element to the array, checking for the maximum
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// size of any one element.
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// (I'm not sure if this is the 'correct' way to do it, but it's the only
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// logical one given the nature of the ASCII format)
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double d;
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if (token is byte)
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{
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d = (byte)token;
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}
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else if (token is int)
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{
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d = (int)token;
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if (arrayType < ArrayType.Int)
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arrayType = ArrayType.Int;
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}
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else if (token is long)
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{
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d = (long)token;
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if (arrayType < ArrayType.Long)
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arrayType = ArrayType.Long;
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}
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else if (token is float)
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{
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d = (float)token;
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// A long can't be accurately represented by a float
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arrayType = arrayType < ArrayType.Long
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? ArrayType.Float : ArrayType.Double;
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}
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else if (token is double)
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{
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d = (double)token;
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if (arrayType < ArrayType.Double)
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arrayType = ArrayType.Double;
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}
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else
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throw new FbxException(line, column,
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"Unexpected '" + token + "', expected a number");
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array[pos++] = d;
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expectComma = true;
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}
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if (pos < array.Length && errorLevel >= FbxErrorLevel.Checked)
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throw new FbxException(line, column,
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"Too few elements in array - expected " + (array.Length - pos) + " more");
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// Convert the array to the smallest type we can see
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Array ret;
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switch (arrayType)
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{
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case ArrayType.Byte:
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var bArray = new byte[array.Length];
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for (int i = 0; i < bArray.Length; i++)
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bArray[i] = (byte)array[i];
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ret = bArray;
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break;
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case ArrayType.Int:
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var iArray = new int[array.Length];
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for (int i = 0; i < iArray.Length; i++)
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iArray[i] = (int)array[i];
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ret = iArray;
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break;
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case ArrayType.Long:
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var lArray = new long[array.Length];
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for (int i = 0; i < lArray.Length; i++)
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lArray[i] = (long)array[i];
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ret = lArray;
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break;
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case ArrayType.Float:
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var fArray = new float[array.Length];
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for (int i = 0; i < fArray.Length; i++)
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fArray[i] = (long)array[i];
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ret = fArray;
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break;
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default:
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ret = array;
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break;
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}
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return ret;
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}
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|
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/// <summary>
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/// Reads the next node from the stream
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/// </summary>
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/// <returns>The read node, or <c>null</c></returns>
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public FbxNode ReadNode()
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{
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var first = ReadToken();
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var id = first as Identifier;
|
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if (id == null)
|
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{
|
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if (first is EndOfStream)
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return null;
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throw new FbxException(line, column,
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"Unexpected '" + first + "', expected an identifier");
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}
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var node = new FbxNode { Name = id.String };
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|
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// Read properties
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object token;
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bool expectComma = false;
|
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while (!'{'.Equals(token = ReadToken()) && !(token is Identifier) && !'}'.Equals(token))
|
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{
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if (expectComma)
|
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{
|
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if (!','.Equals(token))
|
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throw new FbxException(line, column,
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"Unexpected '" + token + "', expected a ','");
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expectComma = false;
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continue;
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}
|
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if (token is char)
|
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{
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var c = (char)token;
|
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switch (c)
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{
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case '*':
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token = ReadArray();
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break;
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case '}':
|
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case ':':
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case ',':
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throw new FbxException(line, column,
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"Unexpected '" + c + "' in property list");
|
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}
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}
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node.Properties.Add(token);
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expectComma = true; // The final comma before the open brace isn't required
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}
|
|
// TODO: Merge property list into an array as necessary
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|
// Now we're either at an open brace, close brace or a new node
|
|
if (token is Identifier || '}'.Equals(token))
|
|
{
|
|
prevToken = token;
|
|
return node;
|
|
}
|
|
// The while loop can't end unless we're at an open brace, so we can continue right on
|
|
object endBrace;
|
|
while (!'}'.Equals(endBrace = ReadToken()))
|
|
{
|
|
prevToken = endBrace; // If it's not an end brace, the next node will need it
|
|
node.Nodes.Add(ReadNode());
|
|
}
|
|
if (node.Nodes.Count < 1) // If there's an open brace, we want that to be preserved
|
|
node.Nodes.Add(null);
|
|
return node;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads a full document from the stream
|
|
/// </summary>
|
|
/// <returns>The complete document object</returns>
|
|
public FbxDocument Read()
|
|
{
|
|
var ret = new FbxDocument();
|
|
|
|
// Read version string
|
|
const string versionString = @"; FBX (\d)\.(\d)\.(\d) project file";
|
|
char c;
|
|
while (char.IsWhiteSpace(c = ReadChar()) && !endStream) { } // Skip whitespace
|
|
bool hasVersionString = false;
|
|
if (c == ';')
|
|
{
|
|
var sb = new StringBuilder();
|
|
do
|
|
{
|
|
sb.Append(c);
|
|
} while (!IsLineEnd(c = ReadChar()) && !endStream);
|
|
var match = Regex.Match(sb.ToString(), versionString);
|
|
hasVersionString = match.Success;
|
|
if (hasVersionString)
|
|
ret.Version = (FbxVersion)(
|
|
int.Parse(match.Groups[1].Value) * 1000 +
|
|
int.Parse(match.Groups[2].Value) * 100 +
|
|
int.Parse(match.Groups[3].Value) * 10
|
|
);
|
|
}
|
|
if (!hasVersionString && errorLevel >= FbxErrorLevel.Strict)
|
|
throw new FbxException(line, column,
|
|
"Invalid version string; first line must match \"" + versionString + "\"");
|
|
FbxNode node;
|
|
while ((node = ReadNode()) != null)
|
|
ret.Nodes.Add(node);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Writes an FBX document in a text format
|
|
/// </summary>
|
|
public class FbxAsciiWriter
|
|
{
|
|
private readonly Stream stream;
|
|
|
|
/// <summary>
|
|
/// Creates a new reader
|
|
/// </summary>
|
|
/// <param name="stream"></param>
|
|
public FbxAsciiWriter(Stream stream)
|
|
{
|
|
if (stream == null)
|
|
throw new ArgumentNullException(nameof(stream));
|
|
this.stream = stream;
|
|
}
|
|
|
|
/// <summary>
|
|
/// The maximum line length in characters when outputting arrays
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// Lines might end up being a few characters longer than this, visibly and otherwise,
|
|
/// so don't rely on it as a hard limit in code!
|
|
/// </remarks>
|
|
public int MaxLineLength { get; set; } = 260;
|
|
|
|
readonly Stack<string> nodePath = new Stack<string>();
|
|
|
|
// Adds the given node text to the string
|
|
void BuildString(FbxNode node, StringBuilder sb, bool writeArrayLength, int indentLevel = 0)
|
|
{
|
|
nodePath.Push(node.Name ?? "");
|
|
int lineStart = sb.Length;
|
|
// Write identifier
|
|
for (int i = 0; i < indentLevel; i++)
|
|
sb.Append('\t');
|
|
sb.Append(node.Name).Append(':');
|
|
|
|
// Write properties
|
|
var first = true;
|
|
for (int j = 0; j < node.Properties.Count; j++)
|
|
{
|
|
var p = node.Properties[j];
|
|
if (p == null)
|
|
continue;
|
|
if (!first)
|
|
sb.Append(',');
|
|
sb.Append(' ');
|
|
if (p is string)
|
|
{
|
|
sb.Append('"').Append(p).Append('"');
|
|
}
|
|
else if (p is Array)
|
|
{
|
|
var array = (Array)p;
|
|
var elementType = p.GetType().GetElementType();
|
|
// ReSharper disable once PossibleNullReferenceException
|
|
// We know it's an array, so we don't need to check for null
|
|
if (array.Rank != 1 || !elementType.IsPrimitive)
|
|
throw new FbxException(nodePath, j,
|
|
"Invalid array type " + p.GetType());
|
|
if (writeArrayLength)
|
|
{
|
|
sb.Append('*').Append(array.Length).Append(" {\n");
|
|
lineStart = sb.Length;
|
|
for (int i = -1; i < indentLevel; i++)
|
|
sb.Append('\t');
|
|
sb.Append("a: ");
|
|
}
|
|
bool pFirst = true;
|
|
foreach (var v in (Array)p)
|
|
{
|
|
if (!pFirst)
|
|
sb.Append(',');
|
|
var vstr = v.ToString();
|
|
if ((sb.Length - lineStart) + vstr.Length >= MaxLineLength)
|
|
{
|
|
sb.Append('\n');
|
|
lineStart = sb.Length;
|
|
}
|
|
sb.Append(vstr);
|
|
pFirst = false;
|
|
}
|
|
if (writeArrayLength)
|
|
{
|
|
sb.Append('\n');
|
|
for (int i = 0; i < indentLevel; i++)
|
|
sb.Append('\t');
|
|
sb.Append('}');
|
|
}
|
|
}
|
|
else if (p is char)
|
|
sb.Append((char)p);
|
|
else if (p.GetType().IsPrimitive && p is IFormattable)
|
|
sb.Append(p);
|
|
else
|
|
throw new FbxException(nodePath, j,
|
|
"Invalid property type " + p.GetType());
|
|
first = false;
|
|
}
|
|
|
|
// Write child nodes
|
|
if (node.Nodes.Count > 0)
|
|
{
|
|
sb.Append(" {\n");
|
|
foreach (var n in node.Nodes)
|
|
{
|
|
if (n == null)
|
|
continue;
|
|
BuildString(n, sb, writeArrayLength, indentLevel + 1);
|
|
}
|
|
for (int i = 0; i < indentLevel; i++)
|
|
sb.Append('\t');
|
|
sb.Append('}');
|
|
}
|
|
sb.Append('\n');
|
|
|
|
nodePath.Pop();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Writes an FBX document to the stream
|
|
/// </summary>
|
|
/// <param name="document"></param>
|
|
/// <remarks>
|
|
/// ASCII FBX files have no header or footer, so you can call this multiple times
|
|
/// </remarks>
|
|
public void Write(FbxDocument document)
|
|
{
|
|
if (document == null)
|
|
throw new ArgumentNullException(nameof(document));
|
|
var sb = new StringBuilder();
|
|
|
|
// Write version header (a comment, but required for many importers)
|
|
var vMajor = (int)document.Version / 1000;
|
|
var vMinor = ((int)document.Version % 1000) / 100;
|
|
var vRev = ((int)document.Version % 100) / 10;
|
|
sb.Append($"; FBX {vMajor}.{vMinor}.{vRev} project file\n\n");
|
|
|
|
nodePath.Clear();
|
|
foreach (var n in document.Nodes)
|
|
{
|
|
if (n == null)
|
|
continue;
|
|
BuildString(n, sb, document.Version >= FbxVersion.v7_1);
|
|
sb.Append('\n');
|
|
}
|
|
var b = Encoding.ASCII.GetBytes(sb.ToString());
|
|
stream.Write(b, 0, b.Length);
|
|
}
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
/// Base class for binary stream wrappers
|
|
/// </summary>
|
|
public abstract class FbxBinary
|
|
{
|
|
// Header string, found at the top of all compliant files
|
|
private static readonly byte[] headerString
|
|
= Encoding.ASCII.GetBytes("Kaydara FBX Binary \0\x1a\0");
|
|
|
|
// This data was entirely calculated by me, honest. Turns out it works, fancy that!
|
|
private static readonly byte[] sourceId =
|
|
{ 0x58, 0xAB, 0xA9, 0xF0, 0x6C, 0xA2, 0xD8, 0x3F, 0x4D, 0x47, 0x49, 0xA3, 0xB4, 0xB2, 0xE7, 0x3D };
|
|
private static readonly byte[] key =
|
|
{ 0xE2, 0x4F, 0x7B, 0x5F, 0xCD, 0xE4, 0xC8, 0x6D, 0xDB, 0xD8, 0xFB, 0xD7, 0x40, 0x58, 0xC6, 0x78 };
|
|
// This wasn't - it just appears at the end of every compliant file
|
|
private static readonly byte[] extension =
|
|
{ 0xF8, 0x5A, 0x8C, 0x6A, 0xDE, 0xF5, 0xD9, 0x7E, 0xEC, 0xE9, 0x0C, 0xE3, 0x75, 0x8F, 0x29, 0x0B };
|
|
|
|
// Number of null bytes between the footer code and the version
|
|
private const int footerZeroes1 = 20;
|
|
// Number of null bytes between the footer version and extension code
|
|
private const int footerZeroes2 = 120;
|
|
|
|
/// <summary>
|
|
/// The size of the footer code
|
|
/// </summary>
|
|
protected const int footerCodeSize = 16;
|
|
|
|
/// <summary>
|
|
/// The namespace separator in the binary format (remember to reverse the identifiers)
|
|
/// </summary>
|
|
protected const string binarySeparator = "\0\x1";
|
|
|
|
/// <summary>
|
|
/// The namespace separator in the ASCII format and in object data
|
|
/// </summary>
|
|
protected const string asciiSeparator = "::";
|
|
|
|
/// <summary>
|
|
/// Checks if the first part of 'data' matches 'original'
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
/// <param name="original"></param>
|
|
/// <returns><c>true</c> if it does, otherwise <c>false</c></returns>
|
|
protected static bool CheckEqual(byte[] data, byte[] original)
|
|
{
|
|
for (int i = 0; i < original.Length; i++)
|
|
if (data[i] != original[i])
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
|
|
public static bool IsBinary(Stream stream)
|
|
{
|
|
var isb = ReadHeader(stream);
|
|
stream.Position = 0;
|
|
return isb;
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
/// Writes the FBX header string
|
|
/// </summary>
|
|
/// <param name="stream"></param>
|
|
protected static void WriteHeader(Stream stream)
|
|
{
|
|
stream.Write(headerString, 0, headerString.Length);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads the FBX header string
|
|
/// </summary>
|
|
/// <param name="stream"></param>
|
|
/// <returns><c>true</c> if it's compliant</returns>
|
|
protected static bool ReadHeader(Stream stream)
|
|
{
|
|
var buf = new byte[headerString.Length];
|
|
stream.Read(buf, 0, buf.Length);
|
|
return CheckEqual(buf, headerString);
|
|
}
|
|
|
|
// Turns out this is the algorithm they use to generate the footer. Who knew!
|
|
static void Encrypt(byte[] a, byte[] b)
|
|
{
|
|
byte c = 64;
|
|
for (int i = 0; i < footerCodeSize; i++)
|
|
{
|
|
a[i] = (byte)(a[i] ^ (byte)(c ^ b[i]));
|
|
c = a[i];
|
|
}
|
|
}
|
|
|
|
const string timePath1 = "FBXHeaderExtension";
|
|
const string timePath2 = "CreationTimeStamp";
|
|
static readonly Stack<string> timePath = new Stack<string>(new[] { timePath1, timePath2 });
|
|
|
|
// Gets a single timestamp component
|
|
static int GetTimestampVar(FbxNode timestamp, string element)
|
|
{
|
|
var elementNode = timestamp[element];
|
|
if (elementNode != null && elementNode.Properties.Count > 0)
|
|
{
|
|
var prop = elementNode.Properties[0];
|
|
if (prop is int || prop is long)
|
|
return (int)prop;
|
|
}
|
|
throw new FbxException(timePath, -1, "Timestamp has no " + element);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Generates the unique footer code based on the document's timestamp
|
|
/// </summary>
|
|
/// <param name="document"></param>
|
|
/// <returns>A 16-byte code</returns>
|
|
protected static byte[] GenerateFooterCode(FbxNodeList document)
|
|
{
|
|
var timestamp = document.GetRelative(timePath1 + "/" + timePath2);
|
|
if (timestamp == null)
|
|
throw new FbxException(timePath, -1, "No creation timestamp");
|
|
try
|
|
{
|
|
return GenerateFooterCode(
|
|
GetTimestampVar(timestamp, "Year"),
|
|
GetTimestampVar(timestamp, "Month"),
|
|
GetTimestampVar(timestamp, "Day"),
|
|
GetTimestampVar(timestamp, "Hour"),
|
|
GetTimestampVar(timestamp, "Minute"),
|
|
GetTimestampVar(timestamp, "Second"),
|
|
GetTimestampVar(timestamp, "Millisecond")
|
|
);
|
|
}
|
|
catch (ArgumentOutOfRangeException)
|
|
{
|
|
throw new FbxException(timePath, -1, "Invalid timestamp");
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Generates a unique footer code based on a timestamp
|
|
/// </summary>
|
|
/// <param name="year"></param>
|
|
/// <param name="month"></param>
|
|
/// <param name="day"></param>
|
|
/// <param name="hour"></param>
|
|
/// <param name="minute"></param>
|
|
/// <param name="second"></param>
|
|
/// <param name="millisecond"></param>
|
|
/// <returns>A 16-byte code</returns>
|
|
protected static byte[] GenerateFooterCode(
|
|
int year, int month, int day,
|
|
int hour, int minute, int second, int millisecond)
|
|
{
|
|
if (year < 0 || year > 9999)
|
|
throw new ArgumentOutOfRangeException(nameof(year));
|
|
if (month < 0 || month > 12)
|
|
throw new ArgumentOutOfRangeException(nameof(month));
|
|
if (day < 0 || day > 31)
|
|
throw new ArgumentOutOfRangeException(nameof(day));
|
|
if (hour < 0 || hour >= 24)
|
|
throw new ArgumentOutOfRangeException(nameof(hour));
|
|
if (minute < 0 || minute >= 60)
|
|
throw new ArgumentOutOfRangeException(nameof(minute));
|
|
if (second < 0 || second >= 60)
|
|
throw new ArgumentOutOfRangeException(nameof(second));
|
|
if (millisecond < 0 || millisecond >= 1000)
|
|
throw new ArgumentOutOfRangeException(nameof(millisecond));
|
|
|
|
var str = (byte[])sourceId.Clone();
|
|
var mangledTime = $"{second:00}{month:00}{hour:00}{day:00}{(millisecond / 10):00}{year:0000}{minute:00}";
|
|
var mangledBytes = Encoding.ASCII.GetBytes(mangledTime);
|
|
Encrypt(str, mangledBytes);
|
|
Encrypt(str, key);
|
|
Encrypt(str, mangledBytes);
|
|
return str;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Writes the FBX footer extension (NB - not the unique footer code)
|
|
/// </summary>
|
|
/// <param name="stream"></param>
|
|
/// <param name="version"></param>
|
|
protected void WriteFooter(BinaryWriter stream, int version)
|
|
{
|
|
var zeroes = new byte[Math.Max(footerZeroes1, footerZeroes2)];
|
|
stream.Write(zeroes, 0, footerZeroes1);
|
|
stream.Write(version);
|
|
stream.Write(zeroes, 0, footerZeroes2);
|
|
stream.Write(extension, 0, extension.Length);
|
|
}
|
|
|
|
static bool AllZero(byte[] array)
|
|
{
|
|
foreach (var b in array)
|
|
if (b != 0)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads and checks the FBX footer extension (NB - not the unique footer code)
|
|
/// </summary>
|
|
/// <param name="stream"></param>
|
|
/// <param name="version"></param>
|
|
/// <returns><c>true</c> if it's compliant</returns>
|
|
protected bool CheckFooter(BinaryReader stream, FbxVersion version)
|
|
{
|
|
var buffer = new byte[Math.Max(footerZeroes1, footerZeroes2)];
|
|
stream.Read(buffer, 0, footerZeroes1);
|
|
bool correct = AllZero(buffer);
|
|
var readVersion = stream.ReadInt32();
|
|
correct &= (readVersion == (int)version);
|
|
stream.Read(buffer, 0, footerZeroes2);
|
|
correct &= AllZero(buffer);
|
|
stream.Read(buffer, 0, extension.Length);
|
|
correct &= CheckEqual(buffer, extension);
|
|
return correct;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads FBX nodes from a binary stream
|
|
/// </summary>
|
|
public class FbxBinaryReader : FbxBinary
|
|
{
|
|
private readonly BinaryReader stream;
|
|
private readonly FbxErrorLevel errorLevel;
|
|
|
|
private delegate object ReadPrimitive(BinaryReader reader);
|
|
|
|
/// <summary>
|
|
/// Creates a new reader
|
|
/// </summary>
|
|
/// <param name="stream">The stream to read from</param>
|
|
/// <param name="errorLevel">When to throw an <see cref="FbxException"/></param>
|
|
/// <exception cref="ArgumentException"><paramref name="stream"/> does
|
|
/// not support seeking</exception>
|
|
public FbxBinaryReader(Stream stream, FbxErrorLevel errorLevel = FbxErrorLevel.Checked)
|
|
{
|
|
if (stream == null)
|
|
throw new ArgumentNullException(nameof(stream));
|
|
if (!stream.CanSeek)
|
|
throw new ArgumentException(
|
|
"The stream must support seeking. Try reading the data into a buffer first");
|
|
this.stream = new BinaryReader(stream, Encoding.ASCII);
|
|
this.errorLevel = errorLevel;
|
|
}
|
|
|
|
// Reads a single property
|
|
object ReadProperty()
|
|
{
|
|
var dataType = (char)stream.ReadByte();
|
|
switch (dataType)
|
|
{
|
|
case 'Y':
|
|
return stream.ReadInt16();
|
|
case 'C':
|
|
return (char)stream.ReadByte();
|
|
case 'I':
|
|
return stream.ReadInt32();
|
|
case 'F':
|
|
return stream.ReadSingle();
|
|
case 'D':
|
|
return stream.ReadDouble();
|
|
case 'L':
|
|
return stream.ReadInt64();
|
|
case 'f':
|
|
return ReadArray(br => br.ReadSingle(), typeof(float));
|
|
case 'd':
|
|
return ReadArray(br => br.ReadDouble(), typeof(double));
|
|
case 'l':
|
|
return ReadArray(br => br.ReadInt64(), typeof(long));
|
|
case 'i':
|
|
return ReadArray(br => br.ReadInt32(), typeof(int));
|
|
case 'b':
|
|
return ReadArray(br => br.ReadBoolean(), typeof(bool));
|
|
case 'S':
|
|
var len = stream.ReadInt32();
|
|
var str = len == 0 ? "" : Encoding.ASCII.GetString(stream.ReadBytes(len));
|
|
// Convert \0\1 to '::' and reverse the tokens
|
|
if (str.Contains(binarySeparator))
|
|
{
|
|
var tokens = str.Split(new[] { binarySeparator }, StringSplitOptions.None);
|
|
var sb = new StringBuilder();
|
|
bool first = true;
|
|
for (int i = tokens.Length - 1; i >= 0; i--)
|
|
{
|
|
if (!first)
|
|
sb.Append(asciiSeparator);
|
|
sb.Append(tokens[i]);
|
|
first = false;
|
|
}
|
|
str = sb.ToString();
|
|
}
|
|
return str;
|
|
case 'R':
|
|
return stream.ReadBytes(stream.ReadInt32());
|
|
default:
|
|
throw new FbxException(stream.BaseStream.Position - 1,
|
|
"Invalid property data type `" + dataType + "'");
|
|
}
|
|
}
|
|
|
|
// Reads an array, decompressing it if required
|
|
Array ReadArray(ReadPrimitive readPrimitive, Type arrayType)
|
|
{
|
|
var len = stream.ReadInt32();
|
|
var encoding = stream.ReadInt32();
|
|
var compressedLen = stream.ReadInt32();
|
|
var ret = Array.CreateInstance(arrayType, len);
|
|
var s = stream;
|
|
var endPos = stream.BaseStream.Position + compressedLen;
|
|
if (encoding != 0)
|
|
{
|
|
if (errorLevel >= FbxErrorLevel.Checked)
|
|
{
|
|
if (encoding != 1)
|
|
throw new FbxException(stream.BaseStream.Position - 1,
|
|
"Invalid compression encoding (must be 0 or 1)");
|
|
var cmf = stream.ReadByte();
|
|
if ((cmf & 0xF) != 8 || (cmf >> 4) > 7)
|
|
throw new FbxException(stream.BaseStream.Position - 1,
|
|
"Invalid compression format " + cmf);
|
|
var flg = stream.ReadByte();
|
|
if (errorLevel >= FbxErrorLevel.Strict && ((cmf << 8) + flg) % 31 != 0)
|
|
throw new FbxException(stream.BaseStream.Position - 1,
|
|
"Invalid compression FCHECK");
|
|
if ((flg & (1 << 5)) != 0)
|
|
throw new FbxException(stream.BaseStream.Position - 1,
|
|
"Invalid compression flags; dictionary not supported");
|
|
}
|
|
else
|
|
{
|
|
stream.BaseStream.Position += 2;
|
|
}
|
|
var codec = new FbxDeflateWithChecksum(stream.BaseStream, CompressionMode.Decompress);
|
|
s = new BinaryReader(codec);
|
|
}
|
|
try
|
|
{
|
|
for (int i = 0; i < len; i++)
|
|
ret.SetValue(readPrimitive(s), i);
|
|
}
|
|
catch (InvalidDataException)
|
|
{
|
|
throw new FbxException(stream.BaseStream.Position - 1,
|
|
"Compressed data was malformed");
|
|
}
|
|
if (encoding != 0)
|
|
{
|
|
if (errorLevel >= FbxErrorLevel.Checked)
|
|
{
|
|
stream.BaseStream.Position = endPos - sizeof(int);
|
|
var checksumBytes = new byte[sizeof(int)];
|
|
stream.BaseStream.Read(checksumBytes, 0, checksumBytes.Length);
|
|
int checksum = 0;
|
|
for (int i = 0; i < checksumBytes.Length; i++)
|
|
checksum = (checksum << 8) + checksumBytes[i];
|
|
if (checksum != ((FbxDeflateWithChecksum)s.BaseStream).Checksum)
|
|
throw new FbxException(stream.BaseStream.Position,
|
|
"Compressed data has invalid checksum");
|
|
}
|
|
else
|
|
{
|
|
stream.BaseStream.Position = endPos;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads a single node.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// This won't read the file header or footer, and as such will fail if the stream is a full FBX file
|
|
/// </remarks>
|
|
/// <returns>The node</returns>
|
|
/// <exception cref="FbxException">The FBX data was malformed
|
|
/// for the reader's error level</exception>
|
|
public FbxNode ReadNode()
|
|
{
|
|
var endOffset = stream.ReadInt32();
|
|
var numProperties = stream.ReadInt32();
|
|
var propertyListLen = stream.ReadInt32();
|
|
var nameLen = stream.ReadByte();
|
|
var name = nameLen == 0 ? "" : Encoding.ASCII.GetString(stream.ReadBytes(nameLen));
|
|
|
|
if (endOffset == 0)
|
|
{
|
|
// The end offset should only be 0 in a null node
|
|
if (errorLevel >= FbxErrorLevel.Checked && (numProperties != 0 || propertyListLen != 0 || !string.IsNullOrEmpty(name)))
|
|
throw new FbxException(stream.BaseStream.Position,
|
|
"Invalid node; expected NULL record");
|
|
return null;
|
|
}
|
|
|
|
var node = new FbxNode { Name = name };
|
|
|
|
var propertyEnd = stream.BaseStream.Position + propertyListLen;
|
|
// Read properties
|
|
for (int i = 0; i < numProperties; i++)
|
|
node.Properties.Add(ReadProperty());
|
|
|
|
if (errorLevel >= FbxErrorLevel.Checked && stream.BaseStream.Position != propertyEnd)
|
|
throw new FbxException(stream.BaseStream.Position,
|
|
"Too many bytes in property list, end point is " + propertyEnd);
|
|
|
|
// Read nested nodes
|
|
var listLen = endOffset - stream.BaseStream.Position;
|
|
if (errorLevel >= FbxErrorLevel.Checked && listLen < 0)
|
|
throw new FbxException(stream.BaseStream.Position,
|
|
"Node has invalid end point");
|
|
if (listLen > 0)
|
|
{
|
|
FbxNode nested;
|
|
do
|
|
{
|
|
nested = ReadNode();
|
|
node.Nodes.Add(nested);
|
|
} while (nested != null);
|
|
if (errorLevel >= FbxErrorLevel.Checked && stream.BaseStream.Position != endOffset)
|
|
throw new FbxException(stream.BaseStream.Position,
|
|
"Too many bytes in node, end point is " + endOffset);
|
|
}
|
|
return node;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads an FBX document from the stream
|
|
/// </summary>
|
|
/// <returns>The top-level node</returns>
|
|
/// <exception cref="FbxException">The FBX data was malformed
|
|
/// for the reader's error level</exception>
|
|
public FbxDocument Read()
|
|
{
|
|
// Read header
|
|
bool validHeader = ReadHeader(stream.BaseStream);
|
|
if (errorLevel >= FbxErrorLevel.Strict && !validHeader)
|
|
throw new FbxException(stream.BaseStream.Position,
|
|
"Invalid header string");
|
|
var document = new FbxDocument { Version = (FbxVersion)stream.ReadInt32() };
|
|
|
|
// Read nodes
|
|
var dataPos = stream.BaseStream.Position;
|
|
FbxNode nested;
|
|
do
|
|
{
|
|
nested = ReadNode();
|
|
if (nested != null)
|
|
document.Nodes.Add(nested);
|
|
} while (nested != null);
|
|
|
|
// Read footer code
|
|
var footerCode = new byte[footerCodeSize];
|
|
stream.BaseStream.Read(footerCode, 0, footerCode.Length);
|
|
if (errorLevel >= FbxErrorLevel.Strict)
|
|
{
|
|
var validCode = GenerateFooterCode(document);
|
|
if (!CheckEqual(footerCode, validCode))
|
|
throw new FbxException(stream.BaseStream.Position - footerCodeSize,
|
|
"Incorrect footer code");
|
|
}
|
|
|
|
// Read footer extension
|
|
dataPos = stream.BaseStream.Position;
|
|
var validFooterExtension = CheckFooter(stream, document.Version);
|
|
if (errorLevel >= FbxErrorLevel.Strict && !validFooterExtension)
|
|
throw new FbxException(dataPos, "Invalid footer");
|
|
return document;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Writes an FBX document to a binary stream
|
|
/// </summary>
|
|
public class FbxBinaryWriter : FbxBinary
|
|
{
|
|
private readonly Stream output;
|
|
private readonly MemoryStream memory;
|
|
private readonly BinaryWriter stream;
|
|
|
|
readonly Stack<string> nodePath = new Stack<string>();
|
|
|
|
/// <summary>
|
|
/// The minimum size of an array in bytes before it is compressed
|
|
/// </summary>
|
|
public int CompressionThreshold { get; set; } = 1024;
|
|
|
|
/// <summary>
|
|
/// Creates a new writer
|
|
/// </summary>
|
|
/// <param name="stream"></param>
|
|
public FbxBinaryWriter(Stream stream)
|
|
{
|
|
if (stream == null)
|
|
throw new ArgumentNullException(nameof(stream));
|
|
output = stream;
|
|
// Wrap in a memory stream to guarantee seeking
|
|
memory = new MemoryStream();
|
|
this.stream = new BinaryWriter(memory, Encoding.ASCII);
|
|
}
|
|
|
|
private delegate void PropertyWriter(BinaryWriter sw, object obj);
|
|
|
|
struct WriterInfo
|
|
{
|
|
public readonly char id;
|
|
public readonly PropertyWriter writer;
|
|
|
|
public WriterInfo(char id, PropertyWriter writer)
|
|
{
|
|
this.id = id;
|
|
this.writer = writer;
|
|
}
|
|
}
|
|
|
|
private static readonly Dictionary<Type, WriterInfo> writePropertyActions
|
|
= new Dictionary<Type, WriterInfo>
|
|
{
|
|
{ typeof(int), new WriterInfo('I', (sw, obj) => sw.Write((int)obj)) },
|
|
{ typeof(short), new WriterInfo('Y', (sw, obj) => sw.Write((short)obj)) },
|
|
{ typeof(long), new WriterInfo('L', (sw, obj) => sw.Write((long)obj)) },
|
|
{ typeof(float), new WriterInfo('F', (sw, obj) => sw.Write((float)obj)) },
|
|
{ typeof(double), new WriterInfo('D', (sw, obj) => sw.Write((double)obj)) },
|
|
{ typeof(bool), new WriterInfo('C', (sw, obj) => sw.Write((byte)(char)obj)) },
|
|
{ typeof(byte[]), new WriterInfo('R', WriteRaw) },
|
|
{ typeof(string), new WriterInfo('S', WriteString) },
|
|
// null elements indicate arrays - they are checked again with their element type
|
|
{ typeof(int[]), new WriterInfo('i', null) },
|
|
{ typeof(long[]), new WriterInfo('l', null) },
|
|
{ typeof(float[]), new WriterInfo('f', null) },
|
|
{ typeof(double[]), new WriterInfo('d', null) },
|
|
{ typeof(bool[]), new WriterInfo('b', null) },
|
|
};
|
|
|
|
static void WriteRaw(BinaryWriter stream, object obj)
|
|
{
|
|
var bytes = (byte[])obj;
|
|
stream.Write(bytes.Length);
|
|
stream.Write(bytes);
|
|
}
|
|
|
|
static void WriteString(BinaryWriter stream, object obj)
|
|
{
|
|
var str = obj.ToString();
|
|
// Replace "::" with \0\1 and reverse the tokens
|
|
if (str.Contains(asciiSeparator))
|
|
{
|
|
var tokens = str.Split(new[] { asciiSeparator }, StringSplitOptions.None);
|
|
var sb = new StringBuilder();
|
|
bool first = true;
|
|
for (int i = tokens.Length - 1; i >= 0; i--)
|
|
{
|
|
if (!first)
|
|
sb.Append(binarySeparator);
|
|
sb.Append(tokens[i]);
|
|
first = false;
|
|
}
|
|
str = sb.ToString();
|
|
}
|
|
var bytes = Encoding.ASCII.GetBytes(str);
|
|
stream.Write(bytes.Length);
|
|
stream.Write(bytes);
|
|
}
|
|
|
|
void WriteArray(Array array, Type elementType, PropertyWriter writer)
|
|
{
|
|
stream.Write(array.Length);
|
|
|
|
var size = array.Length * Marshal.SizeOf(elementType);
|
|
bool compress = size >= CompressionThreshold;
|
|
stream.Write(compress ? 1 : 0);
|
|
|
|
var sw = stream;
|
|
FbxDeflateWithChecksum codec = null;
|
|
|
|
var compressLengthPos = stream.BaseStream.Position;
|
|
stream.Write(0); // Placeholder compressed length
|
|
var dataStart = stream.BaseStream.Position;
|
|
if (compress)
|
|
{
|
|
stream.Write(new byte[] { 0x58, 0x85 }, 0, 2); // Header bytes for DeflateStream settings
|
|
codec = new FbxDeflateWithChecksum(stream.BaseStream, CompressionMode.Compress, true);
|
|
sw = new BinaryWriter(codec);
|
|
}
|
|
foreach (var obj in array)
|
|
writer(sw, obj);
|
|
if (compress)
|
|
{
|
|
codec.Close(); // This is important - otherwise bytes can be incorrect
|
|
var checksum = codec.Checksum;
|
|
byte[] bytes =
|
|
{
|
|
(byte)((checksum >> 24) & 0xFF),
|
|
(byte)((checksum >> 16) & 0xFF),
|
|
(byte)((checksum >> 8) & 0xFF),
|
|
(byte)(checksum & 0xFF),
|
|
};
|
|
stream.Write(bytes);
|
|
}
|
|
|
|
// Now we can write the compressed data length, since we know the size
|
|
if (compress)
|
|
{
|
|
var dataEnd = stream.BaseStream.Position;
|
|
stream.BaseStream.Position = compressLengthPos;
|
|
stream.Write((int)(dataEnd - dataStart));
|
|
stream.BaseStream.Position = dataEnd;
|
|
}
|
|
}
|
|
|
|
void WriteProperty(object obj, int id)
|
|
{
|
|
if (obj == null)
|
|
return;
|
|
WriterInfo writerInfo;
|
|
if (!writePropertyActions.TryGetValue(obj.GetType(), out writerInfo))
|
|
throw new FbxException(nodePath, id,
|
|
"Invalid property type " + obj.GetType());
|
|
stream.Write((byte)writerInfo.id);
|
|
// ReSharper disable once AssignNullToNotNullAttribute
|
|
if (writerInfo.writer == null) // Array type
|
|
{
|
|
var elementType = obj.GetType().GetElementType();
|
|
WriteArray((Array)obj, elementType, writePropertyActions[elementType].writer);
|
|
}
|
|
else
|
|
writerInfo.writer(stream, obj);
|
|
}
|
|
|
|
// Data for a null node
|
|
static readonly byte[] nullData = new byte[13];
|
|
|
|
// Writes a single document to the buffer
|
|
void WriteNode(FbxNode node)
|
|
{
|
|
if (node == null)
|
|
{
|
|
stream.BaseStream.Write(nullData, 0, nullData.Length);
|
|
}
|
|
else
|
|
{
|
|
nodePath.Push(node.Name ?? "");
|
|
var name = string.IsNullOrEmpty(node.Name) ? null : Encoding.ASCII.GetBytes(node.Name);
|
|
if (name != null && name.Length > byte.MaxValue)
|
|
throw new FbxException(stream.BaseStream.Position,
|
|
"Node name is too long");
|
|
|
|
// Header
|
|
var endOffsetPos = stream.BaseStream.Position;
|
|
stream.Write(0); // End offset placeholder
|
|
stream.Write(node.Properties.Count);
|
|
var propertyLengthPos = stream.BaseStream.Position;
|
|
stream.Write(0); // Property length placeholder
|
|
stream.Write((byte)(name?.Length ?? 0));
|
|
if (name != null)
|
|
stream.Write(name);
|
|
|
|
// Write properties and length
|
|
var propertyBegin = stream.BaseStream.Position;
|
|
for (int i = 0; i < node.Properties.Count; i++)
|
|
{
|
|
WriteProperty(node.Properties[i], i);
|
|
}
|
|
var propertyEnd = stream.BaseStream.Position;
|
|
stream.BaseStream.Position = propertyLengthPos;
|
|
stream.Write((int)(propertyEnd - propertyBegin));
|
|
stream.BaseStream.Position = propertyEnd;
|
|
|
|
// Write child nodes
|
|
if (node.Nodes.Count > 0)
|
|
{
|
|
foreach (var n in node.Nodes)
|
|
{
|
|
if (n == null)
|
|
continue;
|
|
WriteNode(n);
|
|
}
|
|
WriteNode(null);
|
|
}
|
|
|
|
// Write end offset
|
|
var dataEnd = stream.BaseStream.Position;
|
|
stream.BaseStream.Position = endOffsetPos;
|
|
stream.Write((int)dataEnd);
|
|
stream.BaseStream.Position = dataEnd;
|
|
|
|
nodePath.Pop();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Writes an FBX file to the output
|
|
/// </summary>
|
|
/// <param name="document"></param>
|
|
public void Write(FbxDocument document)
|
|
{
|
|
stream.BaseStream.Position = 0;
|
|
WriteHeader(stream.BaseStream);
|
|
stream.Write((int)document.Version);
|
|
// TODO: Do we write a top level node or not? Maybe check the version?
|
|
nodePath.Clear();
|
|
foreach (var node in document.Nodes)
|
|
WriteNode(node);
|
|
WriteNode(null);
|
|
stream.Write(GenerateFooterCode(document));
|
|
WriteFooter(stream, (int)document.Version);
|
|
output.Write(memory.GetBuffer(), 0, (int)memory.Position);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
/// A top-level FBX node
|
|
/// </summary>
|
|
public class FbxDocument : FbxNodeList
|
|
{
|
|
/// <summary>
|
|
/// Describes the format and data of the document
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// It isn't recommended that you change this value directly, because
|
|
/// it won't change any of the document's data which can be version-specific.
|
|
/// Most FBX importers can cope with any version.
|
|
/// </remarks>
|
|
public FbxVersion Version { get; set; } = FbxVersion.v7_4;
|
|
|
|
|
|
/// <summary>
|
|
/// Creates connections between objects and returns the root nodes.
|
|
/// (added by dexyfex)
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public List<FbxNode> GetSceneNodes()
|
|
{
|
|
var fobjs = this["Objects"];
|
|
if (fobjs?.Nodes == null)
|
|
return null;
|
|
|
|
var fconns = this["Connections"];
|
|
if (fconns?.Nodes == null)
|
|
return null;
|
|
|
|
var fobjdict = new Dictionary<long, FbxNode>();
|
|
var rootnodes = new List<FbxNode>();
|
|
|
|
foreach (var node in fobjs.Nodes) //put all the object nodes into a decktionary for the connections
|
|
{
|
|
if (node == null) continue;
|
|
long id = 0;
|
|
if (node.Value is long)
|
|
{ id = (long)node.Value; }
|
|
if (id == 0)
|
|
{ }//shouldn't happen..
|
|
fobjdict[id] = node;
|
|
}
|
|
|
|
foreach (var node in fconns.Nodes) //build the scene hierarchy by adding connections to object nodes
|
|
{
|
|
if (node == null) continue;
|
|
var connType = node.Value as string;
|
|
if ((connType == "OO") || (connType == "OP"))
|
|
{
|
|
if (node.Properties.Count < 3) { continue; }
|
|
if (!(node.Properties[1] is long)) { continue; }
|
|
if (!(node.Properties[2] is long)) { continue; }
|
|
long cid = (long)node.Properties[1];
|
|
long pid = (long)node.Properties[2];
|
|
FbxNode cnode;
|
|
FbxNode pnode;
|
|
fobjdict.TryGetValue(cid, out cnode);
|
|
fobjdict.TryGetValue(pid, out pnode);
|
|
if (cnode == null) { continue; }
|
|
if (pnode == null)
|
|
{
|
|
rootnodes.Add(cnode);
|
|
}
|
|
else
|
|
{
|
|
pnode.Connections.Add(cnode);
|
|
}
|
|
}
|
|
else
|
|
{ }
|
|
}
|
|
|
|
return rootnodes;
|
|
}
|
|
|
|
}
|
|
|
|
/// <summary>
|
|
/// An error with the FBX data input
|
|
/// </summary>
|
|
public class FbxException : Exception
|
|
{
|
|
/// <summary>
|
|
/// An error at a binary stream offset
|
|
/// </summary>
|
|
/// <param name="position"></param>
|
|
/// <param name="message"></param>
|
|
public FbxException(long position, string message) :
|
|
base($"{message}, near offset {position}")
|
|
{
|
|
}
|
|
|
|
/// <summary>
|
|
/// An error in a text file
|
|
/// </summary>
|
|
/// <param name="line"></param>
|
|
/// <param name="column"></param>
|
|
/// <param name="message"></param>
|
|
public FbxException(int line, int column, string message) :
|
|
base($"{message}, near line {line} column {column}")
|
|
{
|
|
}
|
|
|
|
/// <summary>
|
|
/// An error in a node object
|
|
/// </summary>
|
|
/// <param name="nodePath"></param>
|
|
/// <param name="propertyID"></param>
|
|
/// <param name="message"></param>
|
|
public FbxException(Stack<string> nodePath, int propertyID, string message) :
|
|
base(message + ", at " + string.Join("/", nodePath.ToArray()) + (propertyID < 0 ? "" : $"[{propertyID}]"))
|
|
{
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Represents a node in an FBX file
|
|
/// </summary>
|
|
public class FbxNode : FbxNodeList
|
|
{
|
|
/// <summary>
|
|
/// The node name, which is often a class type
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// The name must be smaller than 256 characters to be written to a binary stream
|
|
/// </remarks>
|
|
public string Name { get; set; }
|
|
|
|
/// <summary>
|
|
/// The list of properties associated with the node
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// Supported types are primitives (apart from byte and char),arrays of primitives, and strings
|
|
/// </remarks>
|
|
public List<object> Properties { get; } = new List<object>();
|
|
|
|
/// <summary>
|
|
/// List of FbxNodes that are connected to this node via the Connections section.
|
|
/// (Added by dexyfex, used by FbxConverter)
|
|
/// </summary>
|
|
public List<FbxNode> Connections { get; } = new List<FbxNode>();
|
|
|
|
/// <summary>
|
|
/// The first property element
|
|
/// </summary>
|
|
public object Value
|
|
{
|
|
get { return Properties.Count < 1 ? null : Properties[0]; }
|
|
set
|
|
{
|
|
if (Properties.Count < 1)
|
|
Properties.Add(value);
|
|
else
|
|
Properties[0] = value;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Whether the node is empty of data
|
|
/// </summary>
|
|
public bool IsEmpty => string.IsNullOrEmpty(Name) && Properties.Count == 0 && Nodes.Count == 0;
|
|
|
|
public override string ToString()
|
|
{
|
|
return Name + ((Value != null) ? (": " + Value.ToString()) : "");
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Base class for nodes and documents
|
|
/// </summary>
|
|
public abstract class FbxNodeList
|
|
{
|
|
/// <summary>
|
|
/// The list of child/nested nodes
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// A list with one or more null elements is treated differently than an empty list,
|
|
/// and represented differently in all FBX output files.
|
|
/// </remarks>
|
|
public List<FbxNode> Nodes { get; } = new List<FbxNode>();
|
|
|
|
/// <summary>
|
|
/// Gets a named child node
|
|
/// </summary>
|
|
/// <param name="name"></param>
|
|
/// <returns>The child node, or null</returns>
|
|
public FbxNode this[string name] { get { return Nodes.Find(n => n != null && n.Name == name); } }
|
|
|
|
/// <summary>
|
|
/// Gets a child node, using a '/' separated path
|
|
/// </summary>
|
|
/// <param name="path"></param>
|
|
/// <returns>The child node, or null</returns>
|
|
public FbxNode GetRelative(string path)
|
|
{
|
|
var tokens = path.Split('/');
|
|
FbxNodeList n = this;
|
|
foreach (var t in tokens)
|
|
{
|
|
if (t == "")
|
|
continue;
|
|
n = n[t];
|
|
if (n == null)
|
|
break;
|
|
}
|
|
return n as FbxNode;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Enumerates the FBX file versions
|
|
/// </summary>
|
|
public enum FbxVersion
|
|
{
|
|
/// <summary>
|
|
/// FBX version 6.0
|
|
/// </summary>
|
|
v6_0 = 6000,
|
|
|
|
/// <summary>
|
|
/// FBX version 6.1
|
|
/// </summary>
|
|
v6_1 = 6100,
|
|
|
|
/// <summary>
|
|
/// FBX version 7.0
|
|
/// </summary>
|
|
v7_0 = 7000,
|
|
|
|
/// <summary>
|
|
/// FBX 2011 version
|
|
/// </summary>
|
|
v7_1 = 7100,
|
|
|
|
/// <summary>
|
|
/// FBX 2012 version
|
|
/// </summary>
|
|
v7_2 = 7200,
|
|
|
|
/// <summary>
|
|
/// FBX 2013 version
|
|
/// </summary>
|
|
v7_3 = 7300,
|
|
|
|
/// <summary>
|
|
/// FBX 2014 version
|
|
/// </summary>
|
|
v7_4 = 7400,
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
/// Indicates when a reader should throw errors
|
|
/// </summary>
|
|
public enum FbxErrorLevel
|
|
{
|
|
/// <summary>
|
|
/// Ignores inconsistencies unless the parser can no longer continue
|
|
/// </summary>
|
|
Permissive = 0,
|
|
|
|
/// <summary>
|
|
/// Checks data integrity, such as checksums and end points
|
|
/// </summary>
|
|
Checked = 1,
|
|
|
|
/// <summary>
|
|
/// Checks everything, including magic bytes
|
|
/// </summary>
|
|
Strict = 2,
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
/// A wrapper for DeflateStream that calculates the Adler32 checksum of the payload
|
|
/// </summary>
|
|
public class FbxDeflateWithChecksum : DeflateStream
|
|
{
|
|
private const int modAdler = 65521;
|
|
private uint checksumA;
|
|
private uint checksumB;
|
|
|
|
/// <summary>
|
|
/// Gets the Adler32 checksum at the current point in the stream
|
|
/// </summary>
|
|
public int Checksum
|
|
{
|
|
get
|
|
{
|
|
checksumA %= modAdler;
|
|
checksumB %= modAdler;
|
|
return (int)((checksumB << 16) | checksumA);
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public FbxDeflateWithChecksum(Stream stream, CompressionMode mode) : base(stream, mode)
|
|
{
|
|
ResetChecksum();
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public FbxDeflateWithChecksum(Stream stream, CompressionMode mode, bool leaveOpen) : base(stream, mode, leaveOpen)
|
|
{
|
|
ResetChecksum();
|
|
}
|
|
|
|
// Efficiently extends the checksum with the given buffer
|
|
void CalcChecksum(byte[] array, int offset, int count)
|
|
{
|
|
checksumA %= modAdler;
|
|
checksumB %= modAdler;
|
|
for (int i = offset, c = 0; i < (offset + count); i++, c++)
|
|
{
|
|
checksumA += array[i];
|
|
checksumB += checksumA;
|
|
if (c > 4000) // This is about how many iterations it takes for B to reach IntMax
|
|
{
|
|
checksumA %= modAdler;
|
|
checksumB %= modAdler;
|
|
c = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override void Write(byte[] array, int offset, int count)
|
|
{
|
|
base.Write(array, offset, count);
|
|
CalcChecksum(array, offset, count);
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override int Read(byte[] array, int offset, int count)
|
|
{
|
|
var ret = base.Read(array, offset, count);
|
|
CalcChecksum(array, offset, count);
|
|
return ret;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes the checksum values
|
|
/// </summary>
|
|
public void ResetChecksum()
|
|
{
|
|
checksumA = 1;
|
|
checksumB = 0;
|
|
}
|
|
}
|
|
|
|
}
|