X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fdata%2Fanalogsnapshot.cpp;h=4d4f5d67b8866b4d29aa754c595cf15c2cdd235b;hb=13a3528cfa6ed4dc18c44aae2353ac145b0160cc;hp=4907d7954a186af7c6d7b5f0c2c8447714edc32a;hpb=bb2cdfffd5817feb7a6dcde19b6110a6c253a261;p=pulseview.git

diff --git a/pv/data/analogsnapshot.cpp b/pv/data/analogsnapshot.cpp
index 4907d795..4d4f5d67 100644
--- a/pv/data/analogsnapshot.cpp
+++ b/pv/data/analogsnapshot.cpp
@@ -47,9 +47,11 @@ const float AnalogSnapshot::LogEnvelopeScaleFactor =
 	logf(EnvelopeScaleFactor);
 const uint64_t AnalogSnapshot::EnvelopeDataUnit = 64*1024;	// bytes
 
-AnalogSnapshot::AnalogSnapshot() :
+AnalogSnapshot::AnalogSnapshot(const uint64_t expected_num_samples) :
 	Snapshot(sizeof(float))
 {
+	set_capacity(expected_num_samples);
+
 	lock_guard<recursive_mutex> lock(_mutex);
 	memset(_envelope_levels, 0, sizeof(_envelope_levels));
 }