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Diffstat (limited to '')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/icc_codec.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/icc_codec.h b/third_party/jpeg-xl/lib/jxl/icc_codec.h new file mode 100644 index 0000000000..a6c7477c60 --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/icc_codec.h @@ -0,0 +1,57 @@ +// 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_ICC_CODEC_H_ +#define LIB_JXL_ICC_CODEC_H_ + +// Compressed representation of ICC profiles. + +#include <stddef.h> +#include <stdint.h> + +#include "lib/jxl/base/compiler_specific.h" +#include "lib/jxl/base/padded_bytes.h" +#include "lib/jxl/base/status.h" +#include "lib/jxl/dec_ans.h" +#include "lib/jxl/dec_bit_reader.h" + +namespace jxl { + +struct ICCReader { + Status Init(BitReader* reader, size_t output_limit); + Status Process(BitReader* reader, PaddedBytes* icc); + void Reset() { + bits_to_skip_ = 0; + decompressed_.clear(); + } + + private: + Status CheckEOI(BitReader* reader); + size_t i_ = 0; + size_t bits_to_skip_ = 0; + size_t used_bits_base_ = 0; + uint64_t enc_size_ = 0; + std::vector<uint8_t> context_map_; + ANSCode code_; + ANSSymbolReader ans_reader_; + PaddedBytes decompressed_; +}; + +// `icc` may be empty afterwards - if so, call CreateProfile. Does not append, +// clears any original data that was in icc. +// If `output_limit` is not 0, then returns error if resulting profile would be +// longer than `output_limit` +Status ReadICC(BitReader* JXL_RESTRICT reader, PaddedBytes* JXL_RESTRICT icc, + size_t output_limit = 0); + +// Exposed only for testing +Status PredictICC(const uint8_t* icc, size_t size, PaddedBytes* result); + +// Exposed only for testing +Status UnpredictICC(const uint8_t* enc, size_t size, PaddedBytes* result); + +} // namespace jxl + +#endif // LIB_JXL_ICC_CODEC_H_ |