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@ -1,35 +1,19 @@ |
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namespace ImageSharp.Formats.Jpg.Components.Encoder |
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// <copyright file="HuffmanSpec.cs" company="James Jackson-South">
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// Copyright (c) James Jackson-South and contributors.
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// Licensed under the Apache License, Version 2.0.
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// </copyright>
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namespace ImageSharp.Formats.Jpg.Components.Encoder |
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{ |
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/// <summary>
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/// The Huffman encoding specifications.
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/// The Huffman encoding specifications.
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/// </summary>
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internal struct HuffmanSpec |
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{ |
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/// <summary>
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/// Gets count[i] - The number of codes of length i bits.
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/// </summary>
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public readonly byte[] Count; |
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/// <summary>
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/// Gets value[i] - The decoded value of the codeword at the given index.
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/// </summary>
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public readonly byte[] Values; |
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/// <summary>
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/// Initializes a new instance of the <see cref="HuffmanSpec"/> struct.
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/// </summary>
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/// <param name="count">The number of codes.</param>
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/// <param name="values">The decoded values.</param>
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public HuffmanSpec(byte[] count, byte[] values) |
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{ |
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this.Count = count; |
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this.Values = values; |
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} |
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#pragma warning disable SA1118 // ParameterMustNotSpanMultipleLines
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/// <summary>
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/// The Huffman encoding specifications.
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/// This encoder uses the same Huffman encoding for all images.
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/// The Huffman encoding specifications.
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/// This encoder uses the same Huffman encoding for all images.
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/// </summary>
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public static readonly HuffmanSpec[] TheHuffmanSpecs = |
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{ |
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@ -37,76 +21,116 @@ |
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new HuffmanSpec( |
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new byte[] |
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{ |
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0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 |
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0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, |
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0, 0, 0 |
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}, |
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new byte[] |
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{ |
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 |
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}), |
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{ |
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 |
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}), |
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new HuffmanSpec( |
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new byte[] |
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{ |
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0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125 |
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0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, |
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0, 1, 125 |
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}, |
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new byte[] |
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{ |
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0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, |
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0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, |
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0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, |
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0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, |
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0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25, |
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0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, |
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0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, |
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0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, |
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0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, |
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0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, |
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0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, |
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0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, |
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0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, |
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0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, |
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0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, |
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0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, |
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0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, |
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0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa |
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0x01, 0x02, 0x03, 0x00, 0x04, 0x11, |
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0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, |
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0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, |
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0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, |
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0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, |
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0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, |
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0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, |
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0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, |
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0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, |
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0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, |
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0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, |
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0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, |
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0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, |
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0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, |
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0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, |
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0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, |
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0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, |
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0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, |
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0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, |
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0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, |
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0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3, 0xe4, |
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0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, |
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0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
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0xf9, 0xfa |
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}), |
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new HuffmanSpec( |
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new byte[] |
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{ |
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0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 |
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0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, |
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0, 0, 0 |
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}, |
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new byte[] |
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{ |
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 |
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}), |
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{ |
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 |
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}), |
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// Chrominance AC.
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new HuffmanSpec( |
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new byte[] |
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{ |
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0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 119 |
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0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, |
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1, 2, 119 |
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}, |
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new byte[] |
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{ |
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0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, |
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0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, |
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0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, |
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0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, |
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0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, |
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0x19, 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, |
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0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, |
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0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, |
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0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
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0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, |
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0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, |
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0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, |
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0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, |
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0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, |
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0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, |
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0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, |
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0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, |
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0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa |
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0x00, 0x01, 0x02, 0x03, 0x11, 0x04, |
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0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, |
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0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, |
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0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, |
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0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, |
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0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, |
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0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, |
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0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, |
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0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, |
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0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, |
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0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, |
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0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, |
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0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, |
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0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, |
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0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, |
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0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, |
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0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, |
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0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, |
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0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, |
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0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, |
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0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3, |
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0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, |
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0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
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0xf9, 0xfa |
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}) |
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}; |
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#pragma warning restore SA1118 // ParameterMustNotSpanMultipleLines
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/// <summary>
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/// Gets count[i] - The number of codes of length i bits.
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/// </summary>
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public readonly byte[] Count; |
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/// <summary>
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/// Gets value[i] - The decoded value of the codeword at the given index.
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/// </summary>
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public readonly byte[] Values; |
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/// <summary>
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/// Initializes a new instance of the <see cref="HuffmanSpec"/> struct.
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/// </summary>
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/// <param name="count">
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/// The number of codes.
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/// </param>
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/// <param name="values">
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/// The decoded values.
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/// </param>
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public HuffmanSpec(byte[] count, byte[] values) |
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{ |
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this.Count = count; |
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this.Values = values; |
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} |
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} |
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} |