115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
//===============================================================================
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// Copyright (c) 2014-2016 Advanced Micro Devices, Inc. All rights reserved.
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//===============================================================================
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files(the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions :
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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// BC6H_utils.h Genenral functions and definitions for use in encoder and decoder
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// Revision
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// 0.1 First implementation
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//////////////////////////////////////////////////////////////////////////////////
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#ifndef _BC6H_UTILS_H_
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#define _BC6H_UTILS_H_
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#include "bc6h_definitions.h"
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#include <bitset>
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#include <stddef.h>
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class BitHeader {
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public:
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BitHeader(BYTE in[], int sizeinbytes) {
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m_bits.reset();
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m_sizeinbytes = sizeinbytes;
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if ((in != NULL) && (sizeinbytes <=16)) {
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// Init bits set with given data
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int bitpos = 0;
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for (int i=0; i<sizeinbytes; i++) {
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int bit = 1;
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for (int j=0; j<8; j++) {
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m_bits[bitpos] = in[i] & bit?1:0;
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bit = bit << 1;
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bitpos++;
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}
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}
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}
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}
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~BitHeader() {
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}
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void transferbits(BYTE in[],int sizeinbytes) {
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if ((sizeinbytes <= m_sizeinbytes) && (in!=NULL)) {
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// Init bits set with given data
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memset(in,0,sizeinbytes);
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int bitpos = 0;
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for (int i=0; i<sizeinbytes; i++) {
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int bit = 1;
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for (int j=0; j<8; j++) {
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if (m_bits[bitpos]) in[i]|=bit;
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bit = bit << 1;
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bitpos++;
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}
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}
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}
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}
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int getvalue(int start, int bitsize) {
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int value = 0;
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int end = start + bitsize - 1;
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for (; end >= start; end--) {
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value |= m_bits[end]?1:0;
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if (end > start) value <<= 1;
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}
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return value;
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}
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void setvalue(int start, int bitsize, int value, int maskshift = 0) {
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int end = start + bitsize - 1;
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int mask = 0x1 << maskshift;
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for (; start <= end; start++) {
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m_bits[start] = (value&mask)?1:0;
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mask <<= 1;
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}
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}
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std::bitset<128> m_bits; // 16 bytes max
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int m_sizeinbytes;
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};
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extern void ViewData(unsigned char data[]);
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extern void BC6H_WriteBit(BYTE *base,
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int offset,
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BYTE bitVal);
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extern void BC6H_GetRamp(DWORD endpoint[][MAX_DIMENSION_BIG],
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double ramp[MAX_DIMENSION_BIG][(1<<BC6H_MAX_INDEX_BITS)],
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DWORD clusters[2],
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DWORD componentBits[MAX_DIMENSION_BIG]);
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extern const double BC6H_rampLerpWeights[5][1<<MAX_INDEX_BITS];
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#endif
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