Quelle  enc_entropy_coder.h   Sprache: C

// 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_ENTROPY_CODER_H_
#define LIB_JXL_ENC_ENTROPY_CODER_H_

#include <sys/types.h>

#include <cstdint>
#include <vector>

#include "lib/jxl/ac_context.h"  // BlockCtxMap
#include "lib/jxl/base/compiler_specific.h"
#include "lib/jxl/base/rect.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/coeff_order_fwd.h"
#include "lib/jxl/enc_ans.h"
#include "lib/jxl/frame_header.h"  // YCbCrChromaSubsampling
#include "lib/jxl/image.h"

// Entropy coding and context modeling of DC and AC coefficients, as well as AC
// strategy and quantization field.

namespace jxl {

class AcStrategyImage;

// Generate DCT NxN quantized AC values tokens.
// Only the subset "rect" [in units of blocks] within all images.
// See also DecodeACVarBlock.
Status TokenizeCoefficients(const coeff_order_t* JXL_RESTRICT orders,
                            const Rect& rect,
                            const int32_t* JXL_RESTRICT* JXL_RESTRICT ac_rows,
                            const AcStrategyImage& ac_strategy,
                            const YCbCrChromaSubsampling& cs,
                            Image3I* JXL_RESTRICT tmp_num_nzeroes,
                            std::vector<Token>* JXL_RESTRICT output,
                            const ImageB& qdc, const ImageI& qf,
                            const BlockCtxMap& block_ctx_map);

}  // namespace jxl

#endif  // LIB_JXL_ENC_ENTROPY_CODER_H_