third_party/jpeg-xl/lib/jpegli/decode_marker.h

   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_MARKER_H_
   7 #define LIB_JPEGLI_DECODE_MARKER_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 either
  16 // the end of the next SOS marker or the end of the input.
  17 // The corresponding fields of cinfo are updated with the processed input data.
  18 // Upon return, the input buffer will be at the start or at the end of a marker
  19 // data segment (inter-marker data is allowed).
  20 // Return value is one of:
  21 //   * JPEG_SUSPENDED, if the current input buffer ends before the next SOS or
  22 //       EOI marker. Input buffer refill is handled by the caller;
  23 //   * JPEG_REACHED_SOS, if the next SOS marker is found;
  24 //   * JPEG_REACHED_EOR, if the end of the input is found.
  25 int ProcessMarkers(j_decompress_ptr cinfo, const uint8_t* const data,
  26                    const size_t len, size_t* pos);
  27
  28 jpeg_marker_parser_method GetMarkerProcessor(j_decompress_ptr cinfo);
  29
  30 }  // namespace jpegli
  31
  32 #endif  // LIB_JPEGLI_DECODE_MARKER_H_