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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#ifndef LIB_JXL_HUFFMAN_TABLE_H_
#define LIB_JXL_HUFFMAN_TABLE_H_
#include <stdint.h>
#include <stdlib.h>
namespace jxl {
struct HuffmanCode {
uint8_t bits; /* number of bits used for this symbol */
uint16_t value; /* symbol value or table offset */
};
/* Builds Huffman lookup table assuming code lengths are in symbol order. */
/* Returns 0 in case of error (invalid tree or memory error), otherwise
populated size of table. */
uint32_t BuildHuffmanTable(HuffmanCode* root_table, int root_bits,
const uint8_t* code_lengths,
size_t code_lengths_size, uint16_t* count);
} // namespace jxl
#endif // LIB_JXL_HUFFMAN_TABLE_H_