X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fdata%2Flogicsnapshot.cpp;fp=pv%2Fdata%2Flogicsnapshot.cpp;h=754a456cc8f2e6c078cfd5a46e8b1c756571f79a;hb=27d7c96b57d967edd8bcde9bb5570d573a0ef474;hp=f203e8b674fb57fb37c556edc593c5e1798873a8;hpb=8283c116efc6af0a1adc583be38ab711aa9f2cbb;p=pulseview.git

diff --git a/pv/data/logicsnapshot.cpp b/pv/data/logicsnapshot.cpp
index f203e8b6..754a456c 100644
--- a/pv/data/logicsnapshot.cpp
+++ b/pv/data/logicsnapshot.cpp
@@ -43,10 +43,13 @@ const int LogicSnapshot::MipMapScaleFactor = 1 << MipMapScalePower;
 const float LogicSnapshot::LogMipMapScaleFactor = logf(MipMapScaleFactor);
 const uint64_t LogicSnapshot::MipMapDataUnit = 64*1024;	// bytes
 
-LogicSnapshot::LogicSnapshot(const sr_datafeed_logic &logic) :
+LogicSnapshot::LogicSnapshot(const sr_datafeed_logic &logic,
+                             const uint64_t expected_num_samples) :
 	Snapshot(logic.unitsize),
 	_last_append_sample(0)
 {
+	set_capacity(expected_num_samples);
+
 	lock_guard<recursive_mutex> lock(_mutex);
 	memset(_mip_map, 0, sizeof(_mip_map));
 	append_payload(logic);