[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 {

typedef struct {
	uint64_t sample_index, chunk_num, chunk_offs;
	uint8_t* chunk;
	float* value;
} SegmentAnalogDataIterator;

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);

	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;

	SegmentAnalogDataIterator* begin_sample_iteration(uint64_t start) const;
	void continue_sample_iteration(SegmentAnalogDataIterator* it, uint64_t increase) const;
	void end_sample_iteration(SegmentAnalogDataIterator* it) 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	typedef struct {
	36	uint64_t sample_index, chunk_num, chunk_offs;
	37	uint8_t* chunk;
	38	float* value;
	39	} SegmentAnalogDataIterator;
	40
	41	class AnalogSegment : public Segment
	42	{
	43	public:
	44	struct EnvelopeSample
	45	{
	46	float min;
	47	float max;
	48	};
	49
	50	struct EnvelopeSection
	51	{
	52	uint64_t start;
	53	unsigned int scale;
	54	uint64_t length;
	55	EnvelopeSample *samples;
	56	};
	57
	58	private:
	59	struct Envelope
	60	{
	61	uint64_t length;
	62	uint64_t data_length;
	63	EnvelopeSample *samples;
	64	};
	65
	66	private:
	67	static const unsigned int ScaleStepCount = 10;
	68	static const int EnvelopeScalePower;
	69	static const int EnvelopeScaleFactor;
	70	static const float LogEnvelopeScaleFactor;
	71	static const uint64_t EnvelopeDataUnit;
	72
	73	public:
	74	AnalogSegment(uint64_t samplerate);
	75
	76	virtual ~AnalogSegment();
	77
	78	void append_interleaved_samples(const float *data,
	79	size_t sample_count, size_t stride);
	80
	81	const float* get_samples(int64_t start_sample,
	82	int64_t end_sample) const;
	83
	84	SegmentAnalogDataIterator* begin_sample_iteration(uint64_t start) const;
	85	void continue_sample_iteration(SegmentAnalogDataIterator* it, uint64_t increase) const;
	86	void end_sample_iteration(SegmentAnalogDataIterator* it) const;
	87
	88	void get_envelope_section(EnvelopeSection &s,
	89	uint64_t start, uint64_t end, float min_length) const;
	90
	91	private:
	92	void reallocate_envelope(Envelope &e);
	93
	94	void append_payload_to_envelope_levels();
	95
	96	private:
	97	struct Envelope envelope_levels_[ScaleStepCount];
	98
	99	friend struct AnalogSegmentTest::Basic;
	100	};
	101
	102	} // namespace data
	103	} // namespace pv
	104
	105	#endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP