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/*
* This file is part of the PulseView project.
*
* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP
#define PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP
#include "segment.hpp"
#include <utility>
#include <vector>
#include <QObject>
using std::pair;
namespace AnalogSegmentTest {
struct Basic;
}
namespace pv {
namespace data {
class Analog;
class AnalogSegment : public Segment
{
Q_OBJECT
public:
struct EnvelopeSample
{
float min;
float max;
};
struct EnvelopeSection
{
uint64_t start;
unsigned int scale;
uint64_t length;
EnvelopeSample *samples;
};
private:
struct Envelope
{
uint64_t length;
uint64_t data_length;
EnvelopeSample *samples;
};
private:
static const unsigned int ScaleStepCount = 10;
static const int EnvelopeScalePower;
static const int EnvelopeScaleFactor;
static const float LogEnvelopeScaleFactor;
static const uint64_t EnvelopeDataUnit;
public:
AnalogSegment(Analog& owner, uint32_t segment_id, uint64_t samplerate);
virtual ~AnalogSegment();
void append_interleaved_samples(const float *data,
size_t sample_count, size_t stride);
void get_samples(int64_t start_sample, int64_t end_sample, float* dest) const;
const pair<float, float> get_min_max() const;
float* get_iterator_value_ptr(SegmentDataIterator* it);
void get_envelope_section(EnvelopeSection &s,
uint64_t start, uint64_t end, float min_length) const;
private:
void reallocate_envelope(Envelope &e);
void append_payload_to_envelope_levels();
private:
Analog& owner_;
struct Envelope envelope_levels_[ScaleStepCount];
float min_value_, max_value_;
friend struct AnalogSegmentTest::Basic;
};
} // namespace data
} // namespace pv
#endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP
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