From 5316032fee3794b16e64ecc287eebfee3c6d8c80 Mon Sep 17 00:00:00 2001
From: Paul Licameli <paul.licameli@gmail.com>
Date: Tue, 9 Jun 2015 11:42:38 -0400
Subject: [PATCH] An overload of Envelope::GetValues for nonuniform time steps,
 taking ZoomInfo

---
 src/Envelope.cpp | 7 +++++++
 src/Envelope.h   | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/src/Envelope.cpp b/src/Envelope.cpp
index b570f1cba..1a13e8e4a 100644
--- a/src/Envelope.cpp
+++ b/src/Envelope.cpp
@@ -1180,6 +1180,13 @@ void Envelope::GetValues(double *buffer, int bufferLen,
    }
 }
 
+void Envelope::GetValues
+   (double *buffer, int bufferLen, int leftOffset, const ZoomInfo &zoomInfo) const
+{
+   for (int xx = 0; xx < bufferLen; ++xx)
+      buffer[xx] = GetValue(zoomInfo.PositionToTime(xx, -leftOffset));
+}
+
 int Envelope::NumberOfPointsAfter(double t)
 {
    if( t >= mEnv[mEnv.Count()-1]->GetT() )
diff --git a/src/Envelope.h b/src/Envelope.h
index f1fdb102f..3d49197e0 100644
--- a/src/Envelope.h
+++ b/src/Envelope.h
@@ -160,6 +160,11 @@ class Envelope : public XMLTagHandler {
     * more than one value in a row. */
    void GetValues(double *buffer, int len, double t0, double tstep) const;
 
+   /** \brief Get many envelope points at once, but don't assume uniform time step.
+   */
+   void GetValues
+      (double *buffer, int bufferLen, int leftOffset, const ZoomInfo &zoomInfo) const;
+
    int NumberOfPointsAfter(double t);
    double NextPointAfter(double t);