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Diffstat (limited to 'third_party/jpeg-xl/lib/jpegli/decode_scan.h')
-rw-r--r-- | third_party/jpeg-xl/lib/jpegli/decode_scan.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jpegli/decode_scan.h b/third_party/jpeg-xl/lib/jpegli/decode_scan.h new file mode 100644 index 0000000000..61d05c67d6 --- /dev/null +++ b/third_party/jpeg-xl/lib/jpegli/decode_scan.h @@ -0,0 +1,33 @@ +// 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_JPEGLI_DECODE_SCAN_H_ +#define LIB_JPEGLI_DECODE_SCAN_H_ + +/* clang-format off */ +#include <stdint.h> +#include <stdio.h> +#include <jpeglib.h> +/* clang-format on */ + +namespace jpegli { + +// Reads the available input in the source manager's input buffer until the end +// of the next iMCU row. +// The corresponding fields of cinfo are updated with the processed input data. +// Upon return, the input buffer will be at the start of an MCU, or at the end +// of the scan. +// Return value is one of: +// * JPEG_SUSPENDED, if the input buffer ends before the end of an iMCU row; +// * JPEG_ROW_COMPLETED, if the next iMCU row (but not the scan) is reached; +// * JPEG_SCAN_COMPLETED, if the end of the scan is reached. +int ProcessScan(j_decompress_ptr cinfo, const uint8_t* const data, + const size_t len, size_t* pos, size_t* bit_pos); + +void PrepareForiMCURow(j_decompress_ptr cinfo); + +} // namespace jpegli + +#endif // LIB_JPEGLI_DECODE_SCAN_H_ |