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The Tor Browser
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enc_huffman.h (837B)

      1 // Copyright (c) the JPEG XL Project Authors. All rights reserved.
      2 //
      3 // Use of this source code is governed by a BSD-style
      4 // license that can be found in the LICENSE file.
      5 
      6 #ifndef LIB_JXL_ENC_HUFFMAN_H_
      7 #define LIB_JXL_ENC_HUFFMAN_H_
      8 
      9 #include <cstddef>
     10 #include <cstdint>
     11 
     12 #include "lib/jxl/base/status.h"
     13 #include "lib/jxl/enc_bit_writer.h"
     14 
     15 namespace jxl {
     16 
     17 // Builds a Huffman tree for the given histogram, and encodes it into writer
     18 // in a format that can be read by HuffmanDecodingData::ReadFromBitstream.
     19 // An allotment for `writer` must already have been created by the caller.
     20 Status BuildAndStoreHuffmanTree(const uint32_t* histogram, size_t length,
     21                                uint8_t* depth, uint16_t* bits,
     22                                BitWriter* writer);
     23 
     24 }  // namespace jxl
     25 
     26 #endif  // LIB_JXL_ENC_HUFFMAN_H_