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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_JPEGLI_ENTROPY_CODING_H_
#define LIB_JPEGLI_ENTROPY_CODING_H_
/* clang-format off */
#include <stdio.h>
#include <jpeglib.h>
/* clang-format on */
#include <vector>
#include "lib/jpegli/encode_internal.h"
namespace jpegli {
void CopyHuffmanCodes(j_compress_ptr cinfo, bool* is_baseline);
size_t RestartIntervalForScan(j_compress_ptr cinfo, size_t scan_index);
struct Histogram {
int count[kJpegHuffmanAlphabetSize];
Histogram() { memset(count, 0, sizeof(count)); }
};
struct JpegClusteredHistograms {
std::vector<Histogram> histograms;
std::vector<uint32_t> histogram_indexes;
std::vector<uint32_t> slot_ids;
};
void ClusterJpegHistograms(const Histogram* histograms, size_t num,
JpegClusteredHistograms* clusters);
void AddJpegHuffmanCode(const Histogram& histogram, size_t slot_id,
JPEGHuffmanCode* huff_codes, size_t* num_huff_codes);
void OptimizeHuffmanCodes(j_compress_ptr cinfo, bool* is_baseline);
} // namespace jpegli
#endif // LIB_JPEGLI_ENTROPY_CODING_H_
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