68 lines
2.1 KiB
C#
68 lines
2.1 KiB
C#
using System;
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using System.IO;
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/*
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* Reference arithmetic coding
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* Copyright (c) Project Nayuki
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*
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* https://www.nayuki.io/page/reference-arithmetic-coding
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* https://github.com/nayuki/Reference-arithmetic-coding
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*/
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/// <summary>
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/// Decompression application using adaptive arithmetic coding.
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/// <para>Usage: java AdaptiveArithmeticDecompress InputFile OutputFile</para>
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/// <para>This decompresses files generated by the "AdaptiveArithmeticCompress" application.</para>
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/// </summary>
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public class AdaptiveArithmeticDecompress
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{
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//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
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//ORIGINAL LINE: public static void main(String[] args) throws java.io.IOException
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public static void Main(string[] args)
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{
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/* @@@@ PORT
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// Handle command line arguments
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if (args.Length != 2)
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{
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Console.Error.WriteLine("Usage: java AdaptiveArithmeticDecompress InputFile OutputFile");
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Environment.Exit(1);
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return;
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}
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File inputFile = new File(args[0]);
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File outputFile = new File(args[1]);
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// Perform file decompression
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using (BitInputStream @in = new BitInputStream(new BufferedInputStream(new FileStream(inputFile, FileMode.Open, FileAccess.Read))), Stream @out = new BufferedOutputStream(new FileStream(outputFile, FileMode.Create, FileAccess.Write)))
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{
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decompress(@in, @out);
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}
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*/
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}
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// To allow unit testing, this method is package-private instead of private.
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//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
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//ORIGINAL LINE: static void decompress(BitInputStream in, java.io.OutputStream out) throws java.io.IOException
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internal static void decompress(BitInputStream @in, Stream @out)
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{
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FlatFrequencyTable initFreqs = new FlatFrequencyTable(257);
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FrequencyTable freqs = new SimpleFrequencyTable(initFreqs);
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ArithmeticDecoder dec = new ArithmeticDecoder(32, @in);
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while (true)
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{
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// Decode and write one byte
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int symbol = dec.read(freqs);
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if (symbol == 256) // EOF symbol
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{
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break;
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}
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@out.WriteByte((byte)symbol);
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freqs.increment(symbol);
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}
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}
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}
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