CrwDecompressor.h

Go to the documentation of this file.

/*
    RawSpeed - RAW file decoder.
 
    Copyright (C) 2009-2014 Klaus Post
    Copyright (C) 2014 Pedro Côrte-Real
    Copyright (C) 2018 Roman Lebedev
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
 
#pragma once
 
#include "adt/Array1DRef.h"
#include "adt/Optional.h"
#include "bitstreams/BitStreamerJPEG.h"
#include "codes/PrefixCodeDecoder.h"
#include "common/RawImage.h"
#include "decompressors/AbstractDecompressor.h"
#include <array>
#include <cstdint>
 
namespace rawspeed {
 
class CrwDecompressor final : public AbstractDecompressor {
  using crw_hts = std::array<PrefixCodeDecoder<>, 2>;
 
  RawImage mRaw;
  crw_hts mHuff;
 
  Array1DRef<const uint8_t> input;
  Optional<Array1DRef<const uint8_t>> lowbitInput;
 
public:
  CrwDecompressor(RawImage img, uint32_t dec_table_,
                  Array1DRef<const uint8_t> input,
                  Optional<Array1DRef<const uint8_t>> lowbitInput);
 
  void decompress();
 
private:
  static PrefixCodeDecoder<> makeDecoder(const uint8_t* ncpl,
                                         const uint8_t* values);
  static crw_hts initHuffTables(uint32_t table);
 
  inline static void decodeBlock(std::array<int16_t, 64>* diffBuf,
                                 const crw_hts& mHuff, BitStreamerJPEG& bs);
};
 
} // namespace rawspeed