Added code to construct analog envelope levels

[pulseview.git] / pv / data / analogsnapshot.h

diff --git a/pv/data/analogsnapshot.h b/pv/data/analogsnapshot.h
index a45391849220332b892faa9ed3eaa79df30a4df6..8eec2797f1a4aa77b5945ccf31f2eef926600dce 100644 (file)
--- a/pv/data/analogsnapshot.h
+++ b/pv/data/analogsnapshot.h
@@ -31,15 +31,44 @@ namespace data {
 
 class AnalogSnapshot : public Snapshot
 {
+private:
+       struct EnvelopeSample
+       {
+               float min;
+               float max;
+       };
+
+       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(const sr_datafeed_analog &analog);
 
+       virtual ~AnalogSnapshot();
+
        void append_payload(const sr_datafeed_analog &analog);
 
        const float* get_samples(int64_t start_sample,
                int64_t end_sample) const;
-};
 
+private:
+       void reallocate_envelope(Envelope &l);
+
+       void append_payload_to_envelope_levels();
+
+private:
+       struct Envelope _envelope_levels[ScaleStepCount];
 } // namespace data
 } // namespace pv