blob: d7a66584e82fb1cae4cd16f79882f4e81dd5c9d2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
// 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_ENC_HUFFMAN_H_
#define LIB_JXL_ENC_HUFFMAN_H_
#include "lib/jxl/enc_bit_writer.h"
namespace jxl {
// Builds a Huffman tree for the given histogram, and encodes it into writer
// in a format that can be read by HuffmanDecodingData::ReadFromBitstream.
// An allotment for `writer` must already have been created by the caller.
void BuildAndStoreHuffmanTree(const uint32_t* histogram, size_t length,
uint8_t* depth, uint16_t* bits,
BitWriter* writer);
} // namespace jxl
#endif // LIB_JXL_ENC_HUFFMAN_H_
|
