[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>

namespace AnalogSegmentTest {
struct Basic;
}

namespace pv {
namespace data {

class AnalogSegment : public Segment
{
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(uint64_t samplerate, uint64_t expected_num_samples = 0);

	virtual ~AnalogSegment();

	void append_interleaved_samples(const float *data,
		size_t sample_count, size_t stride);

	const float* get_samples(int64_t start_sample,
		int64_t end_sample) const;

	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:
	struct Envelope envelope_levels_[ScaleStepCount];

	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	namespace AnalogSegmentTest {
	29	struct Basic;
	30	}
	31
	32	namespace pv {
	33	namespace data {
	34
	35	class AnalogSegment : public Segment
	36	{
	37	public:
	38	struct EnvelopeSample
	39	{
	40	float min;
	41	float max;
	42	};
	43
	44	struct EnvelopeSection
	45	{
	46	uint64_t start;
	47	unsigned int scale;
	48	uint64_t length;
	49	EnvelopeSample *samples;
	50	};
	51
	52	private:
	53	struct Envelope
	54	{
	55	uint64_t length;
	56	uint64_t data_length;
	57	EnvelopeSample *samples;
	58	};
	59
	60	private:
	61	static const unsigned int ScaleStepCount = 10;
	62	static const int EnvelopeScalePower;
	63	static const int EnvelopeScaleFactor;
	64	static const float LogEnvelopeScaleFactor;
	65	static const uint64_t EnvelopeDataUnit;
	66
	67	public:
	68	AnalogSegment(uint64_t samplerate, uint64_t expected_num_samples = 0);
	69
	70	virtual ~AnalogSegment();
	71
	72	void append_interleaved_samples(const float *data,
	73	size_t sample_count, size_t stride);
	74
	75	const float* get_samples(int64_t start_sample,
	76	int64_t end_sample) const;
	77
	78	void get_envelope_section(EnvelopeSection &s,
	79	uint64_t start, uint64_t end, float min_length) const;
	80
	81	private:
	82	void reallocate_envelope(Envelope &e);
	83
	84	void append_payload_to_envelope_levels();
	85
	86	private:
	87	struct Envelope envelope_levels_[ScaleStepCount];
	88
	89	friend struct AnalogSegmentTest::Basic;
	90	};
	91
	92	} // namespace data
	93	} // namespace pv
	94
	95	#endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP