mirror of git://sigrok.org/pulseview
119 lines
2.7 KiB
C++
119 lines
2.7 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_ANALOGSEGMENT_HPP
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#define PULSEVIEW_PV_DATA_ANALOGSEGMENT_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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namespace AnalogSegmentTest {
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struct Basic;
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}
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namespace pv {
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namespace data {
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class Analog;
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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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float* value;
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} SegmentAnalogDataIterator;
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class AnalogSegment : public Segment
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{
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Q_OBJECT
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public:
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struct EnvelopeSample
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{
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float min;
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float max;
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};
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struct EnvelopeSection
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{
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uint64_t start;
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unsigned int scale;
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uint64_t length;
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EnvelopeSample *samples;
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};
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private:
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struct Envelope
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{
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uint64_t length;
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uint64_t data_length;
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EnvelopeSample *samples;
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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 EnvelopeScalePower;
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static const int EnvelopeScaleFactor;
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static const float LogEnvelopeScaleFactor;
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static const uint64_t EnvelopeDataUnit;
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public:
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AnalogSegment(Analog& owner, uint32_t segment_id, uint64_t samplerate);
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virtual ~AnalogSegment();
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void append_interleaved_samples(const float *data,
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size_t sample_count, size_t stride);
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void get_samples(int64_t start_sample, int64_t end_sample, float* dest) const;
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const pair<float, float> get_min_max() const;
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SegmentAnalogDataIterator* begin_sample_iteration(uint64_t start);
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void continue_sample_iteration(SegmentAnalogDataIterator* it, uint64_t increase);
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void end_sample_iteration(SegmentAnalogDataIterator* it);
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void get_envelope_section(EnvelopeSection &s,
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uint64_t start, uint64_t end, float min_length) const;
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private:
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void reallocate_envelope(Envelope &e);
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void append_payload_to_envelope_levels();
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private:
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Analog& owner_;
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struct Envelope envelope_levels_[ScaleStepCount];
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float min_value_, max_value_;
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friend struct AnalogSegmentTest::Basic;
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};
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} // namespace data
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} // namespace pv
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#endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP
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