mirror of https://github.com/ZDoom/raze-gles.git
72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/*
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* libsmackerdec - Smacker video decoder
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* Copyright (C) 2011 Barry Duncan
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <HuffmanVLC.h>
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namespace SmackerCommon {
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uint16_t VLC_GetCodeBits(BitReader &bits, VLCtable &table)
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{
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uint32_t codeBits = 0;
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// search each length array
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for (uint32_t i = 0; i < table.size(); i++)
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{
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// get and add a new bit to codeBits
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uint32_t theBit = bits.GetBit() << i;
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codeBits |= theBit;
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// search for a code match
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for (uint32_t j = 0; j < table[i].size(); j++)
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{
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if (codeBits == table[i][j].code)
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{
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return table[i][j].symbol;
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}
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}
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}
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// shouldn't get here..
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return 0;
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}
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void VLC_InitTable(VLCtable &table, uint32_t maxLength, uint32_t size, int *lengths, uint32_t *bits)
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{
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table.resize(maxLength);
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for (uint32_t i = 0; i < size; i++)
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{
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VLC newCode;
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newCode.symbol = i;
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newCode.code = bits[i];
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uint32_t codeLength = lengths[i];
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if (codeLength)
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table[codeLength - 1].push_back(newCode);
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}
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}
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uint32_t VLC_GetSize(VLCtable &table)
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{
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return table.size();
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}
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} // close namespace SmackerCommon
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