specified alignment option in Eigen::Map calls

Cpp/lib/waveform.cpp

@@ -284,7 +284,7 @@ std::pair<void*, int64_t> ArrayWaveform::getStaticWaveform() {
     ).array().colwise() * this->wfmParam.amplitudes.array();
     bindBuffer(minSampleLen * 2); // bytes
     auto pData = (int16_t*) this->pDataBuffer;
-    Eigen::Map<EigenVectorXi16> dataMap(pData, minSampleLen);
+    Eigen::Map<EigenVectorXi16, Eigen::Aligned16> dataMap(pData, minSampleLen);
     dataMap = wfmMatrixrix.colwise().sum().cast<int16_t>();
     return std::pair(this->pDataBuffer, int64_t(minSampleLen));
 }
@@ -355,7 +355,7 @@ std::pair<void*, int64_t> ArrayWaveform::getTrickWaveform(
     }
     bindBuffer(sampleLen * 2);
     auto pData = (int16_t*) this->pDataBuffer;
-    Eigen::Map<EigenVectorXi16> dataMap(pData, sampleLen);
+    Eigen::Map<EigenVectorXi16, Eigen::Aligned16> dataMap(pData, sampleLen);
     dataMap = wfmMatrix.rowwise().sum().cast<int16_t> ();
     return std::pair(this->pDataBuffer, int64_t(sampleLen));
 }