SamsungV2Decompressor.h

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/*
    RawSpeed - RAW file decoder.
 
    Copyright (C) 2017 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 "bitstreams/BitStreamerMSB32.h"
#include "decompressors/AbstractSamsungDecompressor.h"
#include "io/ByteStream.h"
#include <array>
#include <cstdint>
 
namespace rawspeed {
 
class RawImage;
 
// Decoder for third generation compressed SRW files (NX1)
class SamsungV2Decompressor final : public AbstractSamsungDecompressor {
public:
  enum struct OptFlags : uint8_t;
 
private:
  uint32_t bitDepth;
  int width;
  int height;
  OptFlags optflags;
  uint16_t initVal;
 
  ByteStream data;
 
  int motion;
  int scale;
  std::array<std::array<int, 2>, 3> diffBitsMode;
 
  static inline __attribute__((always_inline)) int16_t
  getDiff(BitStreamerMSB32& pump, uint32_t len);
 
  inline __attribute__((always_inline)) std::array<uint16_t, 16>
  prepareBaselineValues(BitStreamerMSB32& pump, int row, int col);
 
  inline __attribute__((always_inline)) std::array<uint32_t, 4>
  decodeDiffLengths(BitStreamerMSB32& pump, int row);
 
  inline __attribute__((always_inline)) std::array<int, 16>
  decodeDifferences(BitStreamerMSB32& pump, int row);
 
  inline __attribute__((always_inline)) void
  processBlock(BitStreamerMSB32& pump, int row, int col);
 
  void decompressRow(int row);
 
public:
  SamsungV2Decompressor(const RawImage& image, ByteStream bs, unsigned bit);
 
  void decompress();
};
 
} // namespace rawspeed