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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_AUX_OUT_H_
#define LIB_JXL_AUX_OUT_H_
// Optional output information for debugging and analyzing size usage.
#include <stddef.h>
#include <array>
#include <functional>
#include <string>
namespace jxl {
struct ColorEncoding;
// For LayerName and AuxOut::layers[] index. Order does not matter.
enum {
kLayerHeader = 0,
kLayerTOC,
kLayerDictionary,
kLayerSplines,
kLayerNoise,
kLayerQuant,
kLayerModularTree,
kLayerModularGlobal,
kLayerDC,
kLayerModularDcGroup,
kLayerControlFields,
kLayerOrder,
kLayerAC,
kLayerACTokens,
kLayerModularAcGroup,
kNumImageLayers
};
const char* LayerName(size_t layer);
// Statistics gathered during compression or decompression.
struct AuxOut {
private:
struct LayerTotals {
void Assimilate(const LayerTotals& victim) {
num_clustered_histograms += victim.num_clustered_histograms;
histogram_bits += victim.histogram_bits;
extra_bits += victim.extra_bits;
total_bits += victim.total_bits;
clustered_entropy += victim.clustered_entropy;
}
void Print(size_t num_inputs) const;
size_t num_clustered_histograms = 0;
size_t extra_bits = 0;
// Set via BitsWritten below
size_t histogram_bits = 0;
size_t total_bits = 0;
double clustered_entropy = 0.0;
};
public:
AuxOut() = default;
AuxOut(const AuxOut&) = default;
void Assimilate(const AuxOut& victim);
void Print(size_t num_inputs) const;
size_t TotalBits() const {
size_t total = 0;
for (const auto& layer : layers) {
total += layer.total_bits;
}
return total;
}
std::array<LayerTotals, kNumImageLayers> layers;
size_t num_blocks = 0;
// Number of blocks that use larger DCT (set by ac_strategy).
size_t num_small_blocks = 0;
size_t num_dct4x8_blocks = 0;
size_t num_afv_blocks = 0;
size_t num_dct8_blocks = 0;
size_t num_dct8x16_blocks = 0;
size_t num_dct8x32_blocks = 0;
size_t num_dct16_blocks = 0;
size_t num_dct16x32_blocks = 0;
size_t num_dct32_blocks = 0;
size_t num_dct32x64_blocks = 0;
size_t num_dct64_blocks = 0;
int num_butteraugli_iters = 0;
};
} // namespace jxl
#endif // LIB_JXL_AUX_OUT_H_
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