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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Her Majesty
the Queen in Right of Canada (Communications Research Center Canada)
*/
/*
This file is part of ODR-DabMod.
ODR-DabMod is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
ODR-DabMod 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with ODR-DabMod. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string>
#include <cstdio>
#include <cstring>
#include <stdexcept>
#include <cmath>
#ifdef __SSE__
# include <xmmintrin.h>
#endif // __SSE__
#include "QpskSymbolMapper.h"
#include "PcDebug.h"
QpskSymbolMapper::QpskSymbolMapper(size_t carriers, bool fixedPoint) :
ModCodec(),
m_fixedPoint(fixedPoint),
m_carriers(carriers) { }
int QpskSymbolMapper::process(Buffer* const dataIn, Buffer* dataOut)
{
PDEBUG("QpskSymbolMapper::process"
"(dataIn: %p, dataOut: %p)\n",
dataIn, dataOut);
// 4 output complex symbols per input byte
if (m_fixedPoint) {
dataOut->setLength(dataIn->getLength() * 4 * sizeof(complexfix));
using fixed_t = complexfix::value_type;
const uint8_t* in = reinterpret_cast<const uint8_t*>(dataIn->getData());
fixed_t* out = reinterpret_cast<fixed_t*>(dataOut->getData());
if (dataIn->getLength() % (m_carriers / 4) != 0) {
throw std::runtime_error(
"QpskSymbolMapper::process input size not valid!");
}
constexpr fixed_t v = static_cast<fixed_t>(M_SQRT1_2);
const static fixed_t symbols[16][4] = {
{ v, v, v, v},
{ v, v, v, -v},
{ v, -v, v, v},
{ v, -v, v, -v},
{ v, v, -v, v},
{ v, v, -v, -v},
{ v, -v, -v, v},
{ v, -v, -v, -v},
{-v, v, v, v},
{-v, v, v, -v},
{-v, -v, v, v},
{-v, -v, v, -v},
{-v, v, -v, v},
{-v, v, -v, -v},
{-v, -v, -v, v},
{-v, -v, -v, -v}
};
size_t inOffset = 0;
size_t outOffset = 0;
uint8_t tmp;
for (size_t i = 0; i < dataIn->getLength(); i += m_carriers / 4) {
for (size_t j = 0; j < m_carriers / 8; ++j) {
tmp = (in[inOffset] & 0xc0) >> 4;
tmp |= (in[inOffset + (m_carriers / 8)] & 0xc0) >> 6;
memcpy(&out[outOffset], symbols[tmp], sizeof(fixed_t) * 4);
tmp = (in[inOffset] & 0x30) >> 2;
tmp |= (in[inOffset + (m_carriers / 8)] & 0x30) >> 4;
memcpy(&out[outOffset + 4], symbols[tmp], sizeof(fixed_t) * 4);
tmp = (in[inOffset] & 0x0c);
tmp |= (in[inOffset + (m_carriers / 8)] & 0x0c) >> 2;
memcpy(&out[outOffset + 8], symbols[tmp], sizeof(fixed_t) * 4);
tmp = (in[inOffset] & 0x03) << 2;
tmp |= (in[inOffset + (m_carriers / 8)] & 0x03);
memcpy(&out[outOffset + 12], symbols[tmp], sizeof(fixed_t) * 4);
++inOffset;
outOffset += 4*4;
}
inOffset += m_carriers / 8;
}
}
else {
dataOut->setLength(dataIn->getLength() * 4 * sizeof(complexf));
#ifdef __SSE__
const uint8_t* in = reinterpret_cast<const uint8_t*>(dataIn->getData());
__m128* out = reinterpret_cast<__m128*>(dataOut->getData());
if (dataIn->getLength() % (m_carriers / 4) != 0) {
throw std::runtime_error(
"QpskSymbolMapper::process input size not valid: " +
std::to_string(dataIn->getLength()) +
"(input size) % (" + std::to_string(m_carriers) +
" (carriers) / 4) != 0");
}
const static __m128 symbols[16] = {
_mm_setr_ps( M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps( M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2),
_mm_setr_ps( M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps( M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2),
_mm_setr_ps( M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps( M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2),
_mm_setr_ps( M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps( M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2),
_mm_setr_ps(-M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2)
};
size_t inOffset = 0;
size_t outOffset = 0;
uint8_t tmp = 0;
for (size_t i = 0; i < dataIn->getLength(); i += m_carriers / 4) {
for (size_t j = 0; j < m_carriers / 8; ++j) {
tmp = (in[inOffset] & 0xc0) >> 4;
tmp |= (in[inOffset + (m_carriers / 8)] & 0xc0) >> 6;
out[outOffset] = symbols[tmp];
tmp = (in[inOffset] & 0x30) >> 2;
tmp |= (in[inOffset + (m_carriers / 8)] & 0x30) >> 4;
out[outOffset + 1] = symbols[tmp];
tmp = (in[inOffset] & 0x0c);
tmp |= (in[inOffset + (m_carriers / 8)] & 0x0c) >> 2;
out[outOffset + 2] = symbols[tmp];
tmp = (in[inOffset] & 0x03) << 2;
tmp |= (in[inOffset + (m_carriers / 8)] & 0x03);
out[outOffset + 3] = symbols[tmp];
++inOffset;
outOffset += 4;
}
inOffset += m_carriers / 8;
}
#else // !__SSE__
const uint8_t* in = reinterpret_cast<const uint8_t*>(dataIn->getData());
float* out = reinterpret_cast<float*>(dataOut->getData());
if (dataIn->getLength() % (m_carriers / 4) != 0) {
throw std::runtime_error(
"QpskSymbolMapper::process input size not valid!");
}
if (dataOut->getLength() / sizeof(float) != dataIn->getLength() * 4 * 2) { // 4 output complex symbols per input byte
throw std::runtime_error(
"QpskSymbolMapper::process output size not valid!");
}
const static float symbols[16][4] = {
{ M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
{ M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2},
{ M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
{ M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2},
{ M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2},
{ M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2},
{ M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2},
{ M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2},
{-M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
{-M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2},
{-M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2},
{-M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2},
{-M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2},
{-M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2},
{-M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2},
{-M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2, -M_SQRT1_2}
};
size_t inOffset = 0;
size_t outOffset = 0;
uint8_t tmp;
for (size_t i = 0; i < dataIn->getLength(); i += m_carriers / 4) {
for (size_t j = 0; j < m_carriers / 8; ++j) {
tmp = (in[inOffset] & 0xc0) >> 4;
tmp |= (in[inOffset + (m_carriers / 8)] & 0xc0) >> 6;
memcpy(&out[outOffset], symbols[tmp], sizeof(float) * 4);
tmp = (in[inOffset] & 0x30) >> 2;
tmp |= (in[inOffset + (m_carriers / 8)] & 0x30) >> 4;
memcpy(&out[outOffset + 4], symbols[tmp], sizeof(float) * 4);
tmp = (in[inOffset] & 0x0c);
tmp |= (in[inOffset + (m_carriers / 8)] & 0x0c) >> 2;
memcpy(&out[outOffset + 8], symbols[tmp], sizeof(float) * 4);
tmp = (in[inOffset] & 0x03) << 2;
tmp |= (in[inOffset + (m_carriers / 8)] & 0x03);
memcpy(&out[outOffset + 12], symbols[tmp], sizeof(float) * 4);
++inOffset;
outOffset += 4*4;
}
inOffset += m_carriers / 8;
}
#endif // __SSE__
}
return 1;
}
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