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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_DEC_FILE_H_
#define LIB_JXL_DEC_FILE_H_
// Top-level interface for JXL decoding.
#include <stdint.h>
#include "lib/jxl/base/data_parallel.h"
#include "lib/jxl/base/padded_bytes.h"
#include "lib/jxl/base/span.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/codec_in_out.h"
#include "lib/jxl/dec_params.h"
namespace jxl {
// Decodes the preview image, if present, and stores it in `preview`.
// Must be the first frame in the file. Does nothing if there is no preview
// frame present according to the metadata.
Status DecodePreview(const DecompressParams& dparams,
const CodecMetadata& metadata,
BitReader* JXL_RESTRICT reader, ThreadPool* pool,
ImageBundle* JXL_RESTRICT preview, uint64_t* dec_pixels,
const SizeConstraints* constraints);
// Implementation detail: currently decodes to linear sRGB. The contract is:
// `io` appears 'identical' (modulo compression artifacts) to the encoder input
// in a color-aware viewer. Note that `io->metadata.m.color_encoding`
// identifies the color space that was passed to the encoder; clients that want
// that same encoding must call `io->TransformTo` afterwards.
Status DecodeFile(const DecompressParams& params,
const Span<const uint8_t> file, CodecInOut* io,
ThreadPool* pool = nullptr);
static inline Status DecodeFile(const DecompressParams& params,
const PaddedBytes& file, CodecInOut* io,
ThreadPool* pool = nullptr) {
return DecodeFile(params, Span<const uint8_t>(file), io, pool);
}
} // namespace jxl
#endif // LIB_JXL_DEC_FILE_H_
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