31 lines
1.1 KiB
C++
31 lines
1.1 KiB
C++
// Copyright (c) the JPEG XL Project Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#ifndef LIB_JPEGLI_DECODE_SCAN_H_
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#define LIB_JPEGLI_DECODE_SCAN_H_
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#include <stdint.h>
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#include "lib/jpegli/common.h"
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namespace jpegli {
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// Reads the available input in the source manager's input buffer until the end
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// of the next iMCU row.
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// The corresponding fields of cinfo are updated with the processed input data.
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// Upon return, the input buffer will be at the start of an MCU, or at the end
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// of the scan.
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// Return value is one of:
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// * JPEG_SUSPENDED, if the input buffer ends before the end of an iMCU row;
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// * JPEG_ROW_COMPLETED, if the next iMCU row (but not the scan) is reached;
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// * JPEG_SCAN_COMPLETED, if the end of the scan is reached.
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int ProcessScan(j_decompress_ptr cinfo, const uint8_t* data, size_t len,
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size_t* pos, size_t* bit_pos);
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void PrepareForiMCURow(j_decompress_ptr cinfo);
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} // namespace jpegli
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#endif // LIB_JPEGLI_DECODE_SCAN_H_
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