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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_PATCH_DICTIONARY_H_
#define LIB_JXL_ENC_PATCH_DICTIONARY_H_
// Chooses reference patches, and avoids encoding them once per occurrence.
#include <jxl/cms_interface.h>
#include <sys/types.h>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <utility>
#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/dec_patch_dictionary.h"
#include "lib/jxl/enc_bit_writer.h"
#include "lib/jxl/enc_cache.h"
#include "lib/jxl/enc_params.h"
#include "lib/jxl/image.h"
namespace jxl {
struct AuxOut;
constexpr size_t kMaxPatchSize = 32;
struct QuantizedPatch {
size_t xsize;
size_t ysize;
QuantizedPatch() {
for (size_t i = 0; i < 3; i++) {
pixels[i].resize(kMaxPatchSize * kMaxPatchSize);
fpixels[i].resize(kMaxPatchSize * kMaxPatchSize);
}
}
std::vector<int8_t> pixels[3] = {};
// Not compared. Used only to retrieve original pixels to construct the
// reference image.
std::vector<float> fpixels[3] = {};
bool operator==(const QuantizedPatch& other) const {
if (xsize != other.xsize) return false;
if (ysize != other.ysize) return false;
for (size_t c = 0; c < 3; c++) {
if (memcmp(pixels[c].data(), other.pixels[c].data(),
sizeof(int8_t) * xsize * ysize) != 0)
return false;
}
return true;
}
bool operator<(const QuantizedPatch& other) const {
if (xsize != other.xsize) return xsize < other.xsize;
if (ysize != other.ysize) return ysize < other.ysize;
for (size_t c = 0; c < 3; c++) {
int cmp = memcmp(pixels[c].data(), other.pixels[c].data(),
sizeof(int8_t) * xsize * ysize);
if (cmp > 0) return false;
if (cmp < 0) return true;
}
return false;
}
};
// Pair (patch, vector of occurrences).
using PatchInfo =
std::pair<QuantizedPatch, std::vector<std::pair<uint32_t, uint32_t>>>;
// Friend class of PatchDictionary.
class PatchDictionaryEncoder {
public:
// Only call if HasAny().
static void Encode(const PatchDictionary& pdic, BitWriter* writer,
size_t layer, AuxOut* aux_out);
static void SetPositions(PatchDictionary* pdic,
std::vector<PatchPosition> positions,
std::vector<PatchReferencePosition> ref_positions,
std::vector<PatchBlending> blendings) {
pdic->positions_ = std::move(positions);
pdic->ref_positions_ = std::move(ref_positions);
pdic->blendings_ = std::move(blendings);
pdic->ComputePatchTree();
}
static void SubtractFrom(const PatchDictionary& pdic, Image3F* opsin);
};
Status FindBestPatchDictionary(const Image3F& opsin,
PassesEncoderState* JXL_RESTRICT state,
const JxlCmsInterface& cms, ThreadPool* pool,
AuxOut* aux_out, bool is_xyb = true);
Status RoundtripPatchFrame(Image3F* reference_frame,
PassesEncoderState* JXL_RESTRICT state, int idx,
CompressParams& cparams, const JxlCmsInterface& cms,
ThreadPool* pool, AuxOut* aux_out, bool subtract);
} // namespace jxl
#endif // LIB_JXL_ENC_PATCH_DICTIONARY_H_
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