90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
// Copyright (c) the JPEG XL Project Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#ifndef LIB_EXTRAS_ENC_ENCODE_H_
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#define LIB_EXTRAS_ENC_ENCODE_H_
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// Facade for image encoders.
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#include <jxl/codestream_header.h>
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#include <jxl/types.h>
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#include <cstdint>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "lib/extras/packed_image.h"
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#include "lib/jxl/base/data_parallel.h"
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#include "lib/jxl/base/status.h"
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namespace jxl {
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namespace extras {
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struct EncodedImage {
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// One (if the format supports animations or the image has only one frame) or
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// more 1quential bitstreams.
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std::vector<std::vector<uint8_t>> bitstreams;
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// For each extra channel one or more sequential bitstreams.
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std::vector<std::vector<std::vector<uint8_t>>> extra_channel_bitstreams;
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std::vector<uint8_t> preview_bitstream;
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// If the format does not support embedding color profiles into the bitstreams
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// above, it will be present here, to be written as a separate file. If it
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// does support them, this field will be empty.
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std::vector<uint8_t> icc;
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// Additional output for conformance testing, only filled in by NumPyEncoder.
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std::vector<uint8_t> metadata;
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};
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class Encoder {
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public:
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static std::unique_ptr<Encoder> FromExtension(std::string extension);
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virtual ~Encoder() = default;
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// Set of pixel formats that this encoder takes as input.
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// If empty, the 'encoder' does not need any pixels (it's metadata-only).
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virtual std::vector<JxlPixelFormat> AcceptedFormats() const = 0;
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// Any existing data in encoded_image is discarded.
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virtual Status Encode(const PackedPixelFile& ppf, EncodedImage* encoded_image,
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ThreadPool* pool) const = 0;
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void SetOption(std::string name, std::string value) {
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options_[std::move(name)] = std::move(value);
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}
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static Status VerifyBasicInfo(const JxlBasicInfo& info);
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static Status VerifyImageSize(const PackedImage& image,
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const JxlBasicInfo& info);
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static Status VerifyBitDepth(JxlDataType data_type, uint32_t bits_per_sample,
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uint32_t exponent_bits);
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protected:
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const std::unordered_map<std::string, std::string>& options() const {
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return options_;
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}
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Status VerifyFormat(const JxlPixelFormat& format) const;
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Status VerifyPackedImage(const PackedImage& image,
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const JxlBasicInfo& info) const;
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private:
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std::unordered_map<std::string, std::string> options_;
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};
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std::string ListOfEncodeCodecs();
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} // namespace extras
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} // namespace jxl
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#endif // LIB_EXTRAS_ENC_ENCODE_H_
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