enc_entropy_coder.h

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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_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_