enc_cache.h - mozsearch

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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_CACHE_H_

#define LIB_JXL_ENC_CACHE_H_

#include <jxl/cms_interface.h>

#include <jxl/memory_manager.h>

#include <cstddef>

#include <cstdint>

#include <memory>

#include <vector>

#include "lib/jxl/base/data_parallel.h"

#include "lib/jxl/base/rect.h"

#include "lib/jxl/base/status.h"

#include "lib/jxl/dct_util.h"

#include "lib/jxl/enc_ans.h"

#include "lib/jxl/enc_bit_writer.h"

#include "lib/jxl/enc_params.h"

#include "lib/jxl/enc_progressive_split.h"

#include "lib/jxl/frame_header.h"

#include "lib/jxl/image.h"

#include "lib/jxl/passes_state.h"

#include "lib/jxl/quant_weights.h"

namespace jxl {

struct AuxOut;

// Contains encoder state.

struct PassesEncoderState {

  explicit PassesEncoderState(JxlMemoryManager* memory_manager)

      : shared(memory_manager) {}

  PassesSharedState shared;

  bool streaming_mode = false;

  bool initialize_global_state = true;

  size_t dc_group_index = 0;

  // Per-pass DCT coefficients for the image. One row per group.

  std::vector<std::unique_ptr<ACImage>> coeffs;

  // Raw data for special (reference+DC) frames.

  std::vector<std::unique_ptr<BitWriter>> special_frames;

  // For splitting into passes.

  ProgressiveSplitter progressive_splitter;

  CompressParams cparams;

  struct PassData {

    std::vector<std::vector<Token>> ac_tokens;

    std::vector<uint8_t> context_map;

    EntropyEncodingData codes;

};

  std::vector<PassData> passes;

  std::vector<size_t> histogram_idx;

  // Block sizes seen so far.

  uint32_t used_acs = 0;

  // Coefficient orders that are non-default.

  std::vector<uint32_t> used_orders;

  // Multiplier to be applied to the quant matrices of the x channel.

  float x_qm_multiplier = 1.0f;

  float b_qm_multiplier = 1.0f;

  ImageF initial_quant_masking1x1;

  JxlMemoryManager* memory_manager() const { return shared.memory_manager; }

};

// Initialize per-frame information.

class ModularFrameEncoder;

Status InitializePassesEncoder(const FrameHeader& frame_header,

                               const Image3F& opsin, const Rect& rect,

                               const JxlCmsInterface& cms, ThreadPool* pool,

                               PassesEncoderState* passes_enc_state,

                               ModularFrameEncoder* modular_frame_encoder,

                               AuxOut* aux_out);

Status ComputeACMetadata(ThreadPool* pool, PassesEncoderState* enc_state,

                         ModularFrameEncoder* modular_frame_encoder);

}  // namespace jxl

#endif  // LIB_JXL_ENC_CACHE_H_