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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_MODULAR_H_
#define LIB_JXL_ENC_MODULAR_H_
#include "lib/jxl/base/status.h"
#include "lib/jxl/dec_modular.h"
#include "lib/jxl/enc_bit_writer.h"
#include "lib/jxl/enc_cache.h"
#include "lib/jxl/enc_params.h"
#include "lib/jxl/frame_header.h"
#include "lib/jxl/image.h"
#include "lib/jxl/image_bundle.h"
#include "lib/jxl/modular/encoding/encoding.h"
#include "lib/jxl/modular/modular_image.h"
namespace jxl {
struct AuxOut;
class ModularFrameEncoder {
public:
ModularFrameEncoder(const FrameHeader& frame_header,
const CompressParams& cparams_orig);
Status ComputeEncodingData(const FrameHeader& frame_header,
const ImageMetadata& metadata,
Image3F* JXL_RESTRICT color,
const std::vector<ImageF>& extra_channels,
PassesEncoderState* JXL_RESTRICT enc_state,
const JxlCmsInterface& cms, ThreadPool* pool,
AuxOut* aux_out, bool do_color);
// Encodes global info (tree + histograms) in the `writer`.
Status EncodeGlobalInfo(BitWriter* writer, AuxOut* aux_out);
// Encodes a specific modular image (identified by `stream`) in the `writer`,
// assigning bits to the provided `layer`.
Status EncodeStream(BitWriter* writer, AuxOut* aux_out, size_t layer,
const ModularStreamId& stream);
// Creates a modular image for a given DC group of VarDCT mode. `dc` is the
// input DC image, not quantized; the group is specified by `group_index`, and
// `nl_dc` decides whether to apply a near-lossless processing to the DC or
// not.
void AddVarDCTDC(const Image3F& dc, size_t group_index, bool nl_dc,
PassesEncoderState* enc_state, bool jpeg_transcode);
// Creates a modular image for the AC metadata of the given group
// (`group_index`).
void AddACMetadata(size_t group_index, bool jpeg_transcode,
PassesEncoderState* enc_state);
// Encodes a RAW quantization table in `writer`. If `modular_frame_encoder` is
// null, the quantization table in `encoding` is used, with dimensions `size_x
// x size_y`. Otherwise, the table with ID `idx` is encoded from the given
// `modular_frame_encoder`.
static void EncodeQuantTable(size_t size_x, size_t size_y, BitWriter* writer,
const QuantEncoding& encoding, size_t idx,
ModularFrameEncoder* modular_frame_encoder);
// Stores a quantization table for future usage with `EncodeQuantTable`.
void AddQuantTable(size_t size_x, size_t size_y,
const QuantEncoding& encoding, size_t idx);
std::vector<size_t> ac_metadata_size;
std::vector<uint8_t> extra_dc_precision;
private:
Status PrepareEncoding(const FrameHeader& frame_header, ThreadPool* pool,
EncoderHeuristics* heuristics,
AuxOut* aux_out = nullptr);
Status PrepareStreamParams(const Rect& rect, const CompressParams& cparams,
int minShift, int maxShift,
const ModularStreamId& stream, bool do_color);
std::vector<Image> stream_images_;
std::vector<ModularOptions> stream_options_;
Tree tree_;
std::vector<std::vector<Token>> tree_tokens_;
std::vector<GroupHeader> stream_headers_;
std::vector<std::vector<Token>> tokens_;
EntropyEncodingData code_;
std::vector<uint8_t> context_map_;
FrameDimensions frame_dim_;
CompressParams cparams_;
std::vector<size_t> tree_splits_;
std::vector<ModularMultiplierInfo> multiplier_info_;
std::vector<std::vector<uint32_t>> gi_channel_;
std::vector<size_t> image_widths_;
Predictor delta_pred_ = Predictor::Average4;
};
} // namespace jxl
#endif // LIB_JXL_ENC_MODULAR_H_
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