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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_CHROMA_FROM_LUMA_H_
#define LIB_JXL_ENC_CHROMA_FROM_LUMA_H_
// Chroma-from-luma, computed using heuristics to determine the best linear
// model for the X and B channels from the Y channel.
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "lib/jxl/base/compiler_specific.h"
#include "lib/jxl/base/data_parallel.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/chroma_from_luma.h"
#include "lib/jxl/common.h"
#include "lib/jxl/dec_ans.h"
#include "lib/jxl/dec_bit_reader.h"
#include "lib/jxl/enc_ans.h"
#include "lib/jxl/enc_bit_writer.h"
#include "lib/jxl/entropy_coder.h"
#include "lib/jxl/field_encodings.h"
#include "lib/jxl/fields.h"
#include "lib/jxl/image.h"
#include "lib/jxl/opsin_params.h"
#include "lib/jxl/quant_weights.h"
namespace jxl {
struct AuxOut;
class Quantizer;
void ColorCorrelationMapEncodeDC(ColorCorrelationMap* map, BitWriter* writer,
size_t layer, AuxOut* aux_out);
struct CfLHeuristics {
void Init(const Image3F& opsin);
void PrepareForThreads(size_t num_threads) {
mem = hwy::AllocateAligned<float>(num_threads * kItemsPerThread);
}
void ComputeTile(const Rect& r, const Image3F& opsin,
const DequantMatrices& dequant,
const AcStrategyImage* ac_strategy,
const ImageI* raw_quant_field, const Quantizer* quantizer,
bool fast, size_t thread, ColorCorrelationMap* cmap);
void ComputeDC(bool fast, ColorCorrelationMap* cmap);
ImageF dc_values;
hwy::AlignedFreeUniquePtr<float[]> mem;
// Working set is too large for stack; allocate dynamically.
constexpr static size_t kItemsPerThread =
AcStrategy::kMaxCoeffArea * 3 // Blocks
+ kColorTileDim * kColorTileDim * 4 // AC coeff storage
+ AcStrategy::kMaxCoeffArea * 2; // Scratch space
};
} // namespace jxl
#endif // LIB_JXL_ENC_CHROMA_FROM_LUMA_H_
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