X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fdata%2Fanalogsnapshot.h;h=74d26763825167a41c81390c08647ba0a3b03560;hb=6e3f046e779b939efebdfa4d9e68fe28d9beee59;hp=8eec2797f1a4aa77b5945ccf31f2eef926600dce;hpb=fda5b6e0e0ebbe55f3d173051b8800293f87cd09;p=pulseview.git

diff --git a/pv/data/analogsnapshot.h b/pv/data/analogsnapshot.h
index 8eec2797..74d26763 100644
--- a/pv/data/analogsnapshot.h
+++ b/pv/data/analogsnapshot.h
@@ -26,18 +26,31 @@
 #include <utility>
 #include <vector>
 
+namespace AnalogSnapshotTest {
+class Basic;
+}
+
 namespace pv {
 namespace data {
 
 class AnalogSnapshot : public Snapshot
 {
-private:
+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;
@@ -62,6 +75,9 @@ public:
 	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);
 
@@ -69,6 +85,10 @@ private:
 
 private:
 	struct Envelope _envelope_levels[ScaleStepCount];
+
+	friend class AnalogSnapshotTest::Basic;
+};
+
 } // namespace data
 } // namespace pv