[pulseview.git] / pv / data / analogsegment.hpp

/*
 * 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::enable_shared_from_this;
using std::pair;

namespace AnalogSegmentTest {
struct Basic;
}

namespace pv {
namespace data {

class Analog;

class AnalogSegment : public Segment, public enable_shared_from_this<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);

	float get_sample(int64_t sample_num) const;
	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
Commit	Line	Data
	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#ifndef PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP
	21	#define PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP
	22
	23	#include "segment.hpp"
	24
	25	#include <utility>
	26	#include <vector>
	27
	28	#include <QObject>
	29
	30	using std::enable_shared_from_this;
	31	using std::pair;
	32
	33	namespace AnalogSegmentTest {
	34	struct Basic;
	35	}
	36
	37	namespace pv {
	38	namespace data {
	39
	40	class Analog;
	41
	42	class AnalogSegment : public Segment, public enable_shared_from_this<Segment>
	43	{
	44	Q_OBJECT
	45
	46	public:
	47	struct EnvelopeSample
	48	{
	49	float min;
	50	float max;
	51	};
	52
	53	struct EnvelopeSection
	54	{
	55	uint64_t start;
	56	unsigned int scale;
	57	uint64_t length;
	58	EnvelopeSample *samples;
	59	};
	60
	61	private:
	62	struct Envelope
	63	{
	64	uint64_t length;
	65	uint64_t data_length;
	66	EnvelopeSample *samples;
	67	};
	68
	69	private:
	70	static const unsigned int ScaleStepCount = 10;
	71	static const int EnvelopeScalePower;
	72	static const int EnvelopeScaleFactor;
	73	static const float LogEnvelopeScaleFactor;
	74	static const uint64_t EnvelopeDataUnit;
	75
	76	public:
	77	AnalogSegment(Analog& owner, uint32_t segment_id, uint64_t samplerate);
	78
	79	virtual ~AnalogSegment();
	80
	81	void append_interleaved_samples(const float *data,
	82	size_t sample_count, size_t stride);
	83
	84	float get_sample(int64_t sample_num) const;
	85	void get_samples(int64_t start_sample, int64_t end_sample, float* dest) const;
	86
	87	const pair<float, float> get_min_max() const;
	88
	89	float* get_iterator_value_ptr(SegmentDataIterator* it);
	90
	91	void get_envelope_section(EnvelopeSection &s,
	92	uint64_t start, uint64_t end, float min_length) const;
	93
	94	private:
	95	void reallocate_envelope(Envelope &e);
	96
	97	void append_payload_to_envelope_levels();
	98
	99	private:
	100	Analog& owner_;
	101
	102	struct Envelope envelope_levels_[ScaleStepCount];
	103
	104	float min_value_, max_value_;
	105
	106	friend struct AnalogSegmentTest::Basic;
	107	};
	108
	109	} // namespace data
	110	} // namespace pv
	111
	112	#endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP