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Member "darktable-2.6.3/src/external/rawspeed/src/librawspeed/io/BitPumpMSB32.h" (19 Oct 2019, 1773 Bytes) of package /linux/misc/darktable-2.6.3.tar.xz:


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    1 /*
    2     RawSpeed - RAW file decoder.
    3 
    4     Copyright (C) 2017 Axel Waggershauser
    5 
    6     This library is free software; you can redistribute it and/or
    7     modify it under the terms of the GNU Lesser General Public
    8     License as published by the Free Software Foundation; either
    9     version 2 of the License, or (at your option) any later version.
   10 
   11     This library is distributed in the hope that it will be useful,
   12     but WITHOUT ANY WARRANTY; without even the implied warranty of
   13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   14     Lesser General Public License for more details.
   15 
   16     You should have received a copy of the GNU Lesser General Public
   17     License along with this library; if not, write to the Free Software
   18     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   19 */
   20 
   21 #pragma once
   22 
   23 #include "common/Common.h" // for uint32_t, uint8_t
   24 #include "io/BitStream.h"  // for BitStream, BitStreamCacheRightInLeftOut
   25 #include "io/Endianness.h" // for getLE
   26 
   27 namespace rawspeed {
   28 
   29 struct MSB32BitPumpTag;
   30 
   31 // The MSB data is ordered in MSB bit order,
   32 // i.e. we push into the cache from the right and read it from the left
   33 
   34 using BitPumpMSB32 = BitStream<MSB32BitPumpTag, BitStreamCacheRightInLeftOut>;
   35 
   36 template <> struct BitStreamTraits<BitPumpMSB32> final {
   37   static constexpr bool canUseWithHuffmanTable = true;
   38 };
   39 
   40 template <>
   41 inline BitPumpMSB32::size_type BitPumpMSB32::fillCache(const uint8_t* input,
   42                                                        size_type bufferSize,
   43                                                        size_type* bufPos) {
   44   static_assert(BitStreamCacheBase::MaxGetBits >= 32, "check implementation");
   45 
   46   cache.push(getLE<uint32_t>(input), 32);
   47   return 4;
   48 }
   49 
   50 } // namespace rawspeed