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