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_