decode_scan.h - mozsearch

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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_JPEGLI_DECODE_SCAN_H_

#define LIB_JPEGLI_DECODE_SCAN_H_

#include <stdint.h>

#include "lib/jpegli/common.h"

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* data, size_t len,

                size_t* pos, size_t* bit_pos);

void PrepareForiMCURow(j_decompress_ptr cinfo);

}  // namespace jpegli

#endif  // LIB_JPEGLI_DECODE_SCAN_H_