Source code
Revision control
Copy as Markdown
Other Tools
// 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.
// Functions for reading a jpeg byte stream into a JPEGData object.
#ifndef LIB_JXL_JPEG_ENC_JPEG_DATA_READER_H_
#define LIB_JXL_JPEG_ENC_JPEG_DATA_READER_H_
#include <stddef.h>
#include <stdint.h>
#include "lib/jxl/jpeg/jpeg_data.h"
namespace jxl {
namespace jpeg {
enum class JpegReadMode {
kReadHeader, // only basic headers
kReadTables, // headers and tables (quant, Huffman, ...)
kReadAll, // everything
};
// Parses the JPEG stream contained in data[*pos ... len) and fills in *jpg with
// the parsed information.
// If mode is kReadHeader, it fills in only the image dimensions in *jpg.
// Returns false if the data is not valid JPEG, or if it contains an unsupported
// JPEG feature.
bool ReadJpeg(const uint8_t* data, size_t len, JpegReadMode mode,
JPEGData* jpg);
} // namespace jpeg
} // namespace jxl
#endif // LIB_JXL_JPEG_ENC_JPEG_DATA_READER_H_