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356
DSLogic-gui/pv/decoder/dsserial.cpp
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356
DSLogic-gui/pv/decoder/dsserial.cpp
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/*
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* This file is part of the DSLogic-gui project.
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* DSLogic-gui is based on PulseView.
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*
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* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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* Copyright (C) 2013 DreamSourceLab <dreamsourcelab@dreamsourcelab.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "dsserial.h"
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#include <math.h>
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using namespace boost;
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using namespace std;
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namespace pv {
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namespace decoder {
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const QColor dsSerial::ColorTable[TableSize] = {
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QColor(255, 255, 255, 150),
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QColor(0, 255, 0, 150),
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QColor(255, 0, 0, 150),
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QColor(0, 255, 0, 150),
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QColor(255, 0, 0, 150),
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QColor(0, 0, 255, 150),
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QColor(0, 0, 255, 150),
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QColor(0, 255, 255, 150),
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};
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const QString dsSerial::StateTable[TableSize] = {
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"UNKNOWN",
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"START",
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"STOP",
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"START ERROR",
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"STOP ERROR",
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"PARITY",
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"PARITY ERROR",
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"DATA"
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};
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dsSerial::dsSerial(shared_ptr<data::Logic> data, std::list <int > _sel_probes, QMap<QString, QVariant> &_options, QMap<QString, int> _options_index) :
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Decoder(data, _sel_probes, _options_index)
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{
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assert(_sel_probes.size() == 1);
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_serial_index = _sel_probes.front();
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_baudrate = _options.value("baudrate").toULongLong();
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_stopbits = _options.value("stopbits").toFloat();
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_parity = _options.value("parity").toInt();
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_order = _options.value("order").toBool();
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_bits = _options.value("bits").toUInt();
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_idle_level = _options.value("idle").toBool();
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}
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dsSerial::~dsSerial()
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{
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}
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QString dsSerial::get_decode_name()
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{
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return "Async Serial";
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}
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void dsSerial::recode(std::list <int > _sel_probes, QMap <QString, QVariant>& _options, QMap<QString, int> _options_index)
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{
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assert(_sel_probes.size() == 1);
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_serial_index = _sel_probes.front();
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_baudrate = _options.value("baudrate").toULongLong();
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_stopbits = _options.value("stopbits").toFloat();
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_parity = _options.value("parity").toInt();
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_order = _options.value("order").toBool();
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_bits = _options.value("bits").toUInt();
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_idle_level = _options.value("idle").toBool();
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this->_sel_probes = _sel_probes;
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this->_options_index = _options_index;
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decode();
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}
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void dsSerial::decode()
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{
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assert(_data);
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uint8_t cur_state = Unknown;
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const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
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_data->get_snapshots();
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if (snapshots.empty())
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return;
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const shared_ptr<pv::data::LogicSnapshot> &snapshot =
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snapshots.front();
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uint64_t flag_index;
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uint64_t start_index;
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uint64_t stop_index;
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bool edge;
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uint64_t left = 0;
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uint64_t right = snapshot->get_sample_count() - 1;
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float samplesPerBit;
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int sampleOffset;
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int i;
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_max_width = 0;
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_min_width = right;
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int start_flag = _idle_level ? 0 : 1;
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if (_baudrate != 0)
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samplesPerBit = _data->get_samplerate() * 1.0f / _baudrate;
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else
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samplesPerBit = snapshot->get_min_pulse(left, right, _serial_index);
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sampleOffset = samplesPerBit / 2;
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if (!_state_index.empty())
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_state_index.clear();
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while(1)
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{
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// search start flag
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bool stop_err = false;
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if (snapshot->get_first_edge(flag_index, edge, left, right, _serial_index, start_flag, _serial_index, -1) == SR_OK) {
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left = flag_index + floor((_bits + (_parity != -1) + _stopbits + 1) * samplesPerBit);
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cur_state = Start;
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_state_index.push_back(std::make_pair(std::make_pair(flag_index, samplesPerBit), std::make_pair(cur_state, 0)));
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_max_width = max(_max_width, (uint64_t)samplesPerBit);
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_min_width = min(_min_width, (uint64_t)samplesPerBit);
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start_index = flag_index + samplesPerBit * 1.5;
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stop_index = flag_index + ceil((_bits + (_parity != -1) + 1) * samplesPerBit);
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if (left < right) {
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for (i = 0; i < _stopbits * samplesPerBit; i++) {
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if (_idle_level != ((snapshot->get_sample(stop_index + i) & 1ULL << _serial_index) != 0)) {
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stop_err = true;
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break;
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}
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}
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if (stop_err) {
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cur_state = StopErr;
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_state_index.push_back(std::make_pair(std::make_pair(stop_index, samplesPerBit), std::make_pair(cur_state, 0)));
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} else {
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data_decode(snapshot, start_index, stop_index, samplesPerBit);
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cur_state = Stop;
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_state_index.push_back(std::make_pair(std::make_pair(stop_index, samplesPerBit), std::make_pair(cur_state, 0)));
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}
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} else {
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_cur_edges.clear();
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break;
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}
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} else {
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_cur_edges.clear();
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break;
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}
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}
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}
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void dsSerial::data_decode(const shared_ptr<data::LogicSnapshot> &snapshot, uint64_t start, uint64_t stop, float samplesPerBit)
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{
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(void)stop;
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uint8_t cur_state;
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const uint8_t *src_ptr;
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const int unit_size = snapshot->get_unit_size();
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const uint64_t serial_mask = 1ULL << _serial_index;
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uint32_t data = 0;
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uint32_t parity;
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int i;
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src_ptr = (uint8_t*)snapshot->get_data();
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if (_order) {
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for (i = 0; i < _bits; i++) {
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data = data + (((*(uint64_t*)(src_ptr + (int)(start + samplesPerBit * i) * unit_size) & serial_mask) != 0) << i);
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}
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} else {
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for (i = 0; i < _bits; i++) {
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data = (data << 1) + ((*(uint64_t*)(src_ptr + (int)(start + samplesPerBit * i) * unit_size) & serial_mask) != 0);
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}
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}
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cur_state = Data;
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_state_index.push_back(std::make_pair(std::make_pair(start - samplesPerBit * 0.5, samplesPerBit * _bits),
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std::make_pair(cur_state, data)));
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if (_parity != -1) {
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parity = ((*(uint64_t*)(src_ptr + (int)(start + samplesPerBit * _bits) * unit_size) & serial_mask) != 0);
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parity = parity ^ data;
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parity = (parity & 0x55555555) + ((parity >> 1) & 0x55555555);
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parity = (parity & 0x33333333) + ((parity >> 2) & 0x33333333);
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parity = (parity & 0x0f0f0f0f) + ((parity >> 4) & 0x0f0f0f0f);
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parity = (parity & 0x00ff00ff) + ((parity >> 8) & 0x00ff00ff);
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parity = (parity & 0x0000ffff) + ((parity >> 16) & 0x0000ffff);
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parity = (parity & 0x00000001) ^ _parity;
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cur_state = parity ? ParityErr : Parity;
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_state_index.push_back(std::make_pair(std::make_pair(start + samplesPerBit * (_bits - 0.5), samplesPerBit),
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std::make_pair(cur_state, 0)));
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}
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_max_width = max(_max_width, (uint64_t)(samplesPerBit * _bits));
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}
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void dsSerial::fill_color_table(std::vector <QColor>& _color_table)
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{
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int i;
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for(i = 0; i < TableSize; i++)
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_color_table.push_back(ColorTable[i]);
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}
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void dsSerial::fill_state_table(std::vector <QString>& _state_table)
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{
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int i;
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for(i = 0; i < TableSize; i++)
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_state_table.push_back(StateTable[i]);
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}
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void dsSerial::get_subsampled_states(std::vector<struct ds_view_state> &states,
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uint64_t start, uint64_t end,
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float min_length)
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{
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ds_view_state view_state;
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const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
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_data->get_snapshots();
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if (snapshots.empty())
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return;
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const shared_ptr<pv::data::LogicSnapshot> &snapshot =
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snapshots.front();
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assert(end <= snapshot->get_sample_count());
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assert(start <= end);
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assert(min_length > 0);
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if (!states.empty())
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states.clear();
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if (_state_index.empty())
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return;
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if (start > _state_index.at(_state_index.size() - 1).first.first)
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return;
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if (end < _state_index.at(0).first.first)
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return;
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if (min_length * _view_scale > _max_width) {
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view_state.index = _state_index.at(0).first.first;
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view_state.samples = _state_index.at(_state_index.size() - 1).first.first +
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_state_index.at(_state_index.size() - 1).first.second - _state_index.at(0).first.first;
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view_state.type = DEC_NODETAIL;
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view_state.state = 0;
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view_state.data = 0;
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states.push_back(view_state);
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return;
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}
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uint64_t view_start = 0;
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uint64_t view_end = 0;
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uint64_t minIndex = 0;
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uint64_t maxIndex = _state_index.size() - 1;
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uint64_t i = start * 1.0f / snapshot->get_sample_count() * maxIndex;
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bool check_flag = false;
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int times = 0;
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while(times <= 32) {
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if (_state_index.at(i).first.first + _state_index.at(i).first.second >= start) {
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check_flag = true;
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} else {
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minIndex = i;
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i = ceil((i + maxIndex) / 2.0f);
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}
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if (check_flag) {
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if (i == 0) {
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view_start = i;
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break;
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} else if (_state_index.at(i-1).first.first + _state_index.at(i-1).first.second < start) {
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view_start = i;
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break;
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} else {
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maxIndex = i;
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i = (i + minIndex) / 2;
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}
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check_flag = false;
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}
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times++;
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}
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i = view_start;
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check_flag = false;
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times = 0;
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minIndex = view_start;
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//maxIndex = _state_index.size() - 1;
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maxIndex = min(_state_index.size() - 1, (size_t)end);
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view_end = view_start;
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while(times <= 32) {
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if (_state_index.at(i).first.first <= end) {
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check_flag = true;
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} else {
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maxIndex = i;
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i = (i + minIndex) / 2;
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}
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if (check_flag) {
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if (i == maxIndex) {
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view_end = i;
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break;
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} else if (_state_index.at(i+1).first.first > end) {
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view_end = i;
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break;
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} else {
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minIndex = i;
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i = ceil((i + maxIndex) / 2.0f);
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}
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check_flag = false;
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}
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times++;
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}
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assert(view_end >= view_start);
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for (uint64_t i = view_start; i <= view_end; i++) {
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if (_state_index.at(i).first.second >= min_length * _view_scale) {
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view_state.index = _state_index.at(i).first.first;
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view_state.samples = _state_index.at(i).first.second;
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view_state.type = (_state_index.at(i).second.first == Data) ? DEC_DATA : DEC_CMD;
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view_state.state = _state_index.at(i).second.first;
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view_state.data = _state_index.at(i).second.second;
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states.push_back(view_state);
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} else {
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view_state.index = _state_index.at(i).first.first;
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view_state.samples = _state_index.at(i).first.second;
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view_state.type = DEC_NODETAIL;
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view_state.state = 0;
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view_state.data = 0;
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states.push_back(view_state);
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}
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}
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}
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} // namespace decoder
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} // namespace pv
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