decode_scan.h (1076B)
1 // Copyright (c) the JPEG XL Project Authors. All rights reserved. 2 // 3 // Use of this source code is governed by a BSD-style 4 // license that can be found in the LICENSE file. 5 6 #ifndef LIB_JPEGLI_DECODE_SCAN_H_ 7 #define LIB_JPEGLI_DECODE_SCAN_H_ 8 9 #include <stdint.h> 10 11 #include "lib/jpegli/common.h" 12 13 namespace jpegli { 14 15 // Reads the available input in the source manager's input buffer until the end 16 // of the next iMCU row. 17 // The corresponding fields of cinfo are updated with the processed input data. 18 // Upon return, the input buffer will be at the start of an MCU, or at the end 19 // of the scan. 20 // Return value is one of: 21 // * JPEG_SUSPENDED, if the input buffer ends before the end of an iMCU row; 22 // * JPEG_ROW_COMPLETED, if the next iMCU row (but not the scan) is reached; 23 // * JPEG_SCAN_COMPLETED, if the end of the scan is reached. 24 int ProcessScan(j_decompress_ptr cinfo, const uint8_t* data, size_t len, 25 size_t* pos, size_t* bit_pos); 26 27 void PrepareForiMCURow(j_decompress_ptr cinfo); 28 29 } // namespace jpegli 30 31 #endif // LIB_JPEGLI_DECODE_SCAN_H_