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Diffstat (limited to 'third_party/jpeg-xl/lib/jxl/jpeg/enc_jpeg_data_reader.h')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/jpeg/enc_jpeg_data_reader.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/jpeg/enc_jpeg_data_reader.h b/third_party/jpeg-xl/lib/jxl/jpeg/enc_jpeg_data_reader.h new file mode 100644 index 0000000000..3fad820e9d --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/jpeg/enc_jpeg_data_reader.h @@ -0,0 +1,36 @@ +// 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, const size_t len, JpegReadMode mode, + JPEGData* jpg); + +} // namespace jpeg +} // namespace jxl + +#endif // LIB_JXL_JPEG_ENC_JPEG_DATA_READER_H_ |