mirror of git://sigrok.org/pulseview
141 lines
3.5 KiB
C++
141 lines
3.5 KiB
C++
/*
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* This file is part of the PulseView project.
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*
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* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PULSEVIEW_PV_DATA_LOGICSEGMENT_HPP
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#define PULSEVIEW_PV_DATA_LOGICSEGMENT_HPP
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#include "segment.hpp"
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#include <utility>
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#include <vector>
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#include <QObject>
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using std::pair;
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using std::shared_ptr;
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using std::vector;
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namespace sigrok {
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class Logic;
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}
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namespace LogicSegmentTest {
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struct Pow2;
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struct Basic;
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struct LargeData;
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struct Pulses;
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struct LongPulses;
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}
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namespace pv {
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namespace data {
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class Logic;
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typedef struct {
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uint64_t sample_index, chunk_num, chunk_offs;
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uint8_t* chunk;
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uint8_t* value;
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} SegmentLogicDataIterator;
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class LogicSegment : public Segment
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{
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Q_OBJECT
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private:
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struct MipMapLevel
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{
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uint64_t length;
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uint64_t data_length;
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void *data;
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};
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private:
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static const unsigned int ScaleStepCount = 10;
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static const int MipMapScalePower;
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static const int MipMapScaleFactor;
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static const float LogMipMapScaleFactor;
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static const uint64_t MipMapDataUnit;
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public:
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typedef pair<int64_t, bool> EdgePair;
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public:
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LogicSegment(pv::data::Logic& owner, uint32_t segment_id,
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unsigned int unit_size, uint64_t samplerate);
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virtual ~LogicSegment();
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void append_payload(shared_ptr<sigrok::Logic> logic);
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void append_payload(void *data, uint64_t data_size);
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void get_samples(int64_t start_sample, int64_t end_sample, uint8_t* dest) const;
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SegmentLogicDataIterator* begin_sample_iteration(uint64_t start);
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void continue_sample_iteration(SegmentLogicDataIterator* it, uint64_t increase);
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void end_sample_iteration(SegmentLogicDataIterator* it);
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private:
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uint64_t unpack_sample(const uint8_t *ptr) const;
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void pack_sample(uint8_t *ptr, uint64_t value);
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void reallocate_mipmap_level(MipMapLevel &m);
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void append_payload_to_mipmap();
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uint64_t get_unpacked_sample(uint64_t index) const;
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public:
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/**
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* Parses a logic data segment to generate a list of transitions
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* in a time interval to a given level of detail.
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* @param[out] edges The vector to place the edges into.
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* @param[in] start The start sample index.
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* @param[in] end The end sample index.
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* @param[in] min_length The minimum number of samples that
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* can be resolved at this level of detail.
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* @param[in] sig_index The index of the signal.
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*/
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void get_subsampled_edges(vector<EdgePair> &edges,
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uint64_t start, uint64_t end,
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float min_length, int sig_index);
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private:
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uint64_t get_subsample(int level, uint64_t offset) const;
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static uint64_t pow2_ceil(uint64_t x, unsigned int power);
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private:
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Logic& owner_;
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struct MipMapLevel mip_map_[ScaleStepCount];
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uint64_t last_append_sample_;
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friend struct LogicSegmentTest::Pow2;
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friend struct LogicSegmentTest::Basic;
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friend struct LogicSegmentTest::LargeData;
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friend struct LogicSegmentTest::Pulses;
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friend struct LogicSegmentTest::LongPulses;
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};
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} // namespace data
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} // namespace pv
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#endif // PULSEVIEW_PV_DATA_LOGICSEGMENT_HPP
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