X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fdata%2Fanalogsnapshot.hpp;fp=pv%2Fdata%2Fanalogsnapshot.hpp;h=3c6f99c2c873dad8bb2956eb43672968aef2771c;hb=2acdb232d6bb452cfdfaea3ef5218fb4da592329;hp=0000000000000000000000000000000000000000;hpb=8dbbc7f0b9ea59d0f0d62225772f8a56eee125f5;p=pulseview.git

diff --git a/pv/data/analogsnapshot.hpp b/pv/data/analogsnapshot.hpp
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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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef PULSEVIEW_PV_DATA_ANALOGSNAPSHOT_H
+#define PULSEVIEW_PV_DATA_ANALOGSNAPSHOT_H
+
+#include "snapshot.hpp"
+
+#include <utility>
+#include <vector>
+
+namespace AnalogSnapshotTest {
+struct Basic;
+}
+
+namespace pv {
+namespace data {
+
+class AnalogSnapshot : public Snapshot
+{
+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:
+	AnalogSnapshot(uint64_t expected_num_samples = 0);
+
+	virtual ~AnalogSnapshot();
+
+	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 &l);
+
+	void append_payload_to_envelope_levels();
+
+private:
+	struct Envelope envelope_levels_[ScaleStepCount];
+
+	friend struct AnalogSnapshotTest::Basic;
+};
+
+} // namespace data
+} // namespace pv
+
+#endif // PULSEVIEW_PV_DATA_ANALOGSNAPSHOT_H