Snapshot: Renamed to Segment

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

diff --git a/pv/data/analogsegment.hpp b/pv/data/analogsegment.hpp
new file mode 100644 (file)
index 0000000..38922f5
--- /dev/null
+++ b/pv/data/analogsegment.hpp
@@ -0,0 +1,96 @@
+/*
+ * 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 "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 &l);
+
+       void append_payload_to_envelope_levels();
+
+private:
+       struct Envelope envelope_levels_[ScaleStepCount];
+
+       friend struct AnalogSegmentTest::Basic;
+};
+
+} // namespace data
+} // namespace pv
+
+#endif // PULSEVIEW_PV_DATA_ANALOGSNAPSHOT_H