DelayLine: Allow setting a new maximum delay time after construction

modules/juce_dsp/processors/juce_DelayLine.cpp

@@ -40,8 +40,9 @@ DelayLine<SampleType, InterpolationType>::DelayLine (int maximumDelayInSamples)
 {
     jassert (maximumDelayInSamples >= 0);
 
-    totalSize = jmax (4, maximumDelayInSamples + 1);
     sampleRate = 44100.0;
+
+    setMaximumDelayInSamples (maximumDelayInSamples);
 }
 
 //==============================================================================
@@ -81,6 +82,15 @@ void DelayLine<SampleType, InterpolationType>::prepare (const ProcessSpec& spec)
     reset();
 }
 
+template <typename SampleType, typename InterpolationType>
+void DelayLine<SampleType, InterpolationType>::setMaximumDelayInSamples (int maxDelayInSamples)
+{
+    jassert (maxDelayInSamples >= 0);
+    totalSize = jmax (4, maxDelayInSamples + 1);
+    bufferData.setSize ((int) bufferData.getNumChannels(), totalSize, false, false, true);
+    reset();
+}
+
 template <typename SampleType, typename InterpolationType>
 void DelayLine<SampleType, InterpolationType>::reset()
 {

modules/juce_dsp/processors/juce_DelayLine.h

@@ -112,6 +112,14 @@ public:
     /** Initialises the processor. */
     void prepare (const ProcessSpec& spec);
 
+    /** Sets a new maximum delay in samples.
+
+        Also clears the delay line.
+
+        This may allocate internally, so you should never call it from the audio thread.
+    */
+    void setMaximumDelayInSamples (int maxDelayInSamples);
+
     /** Resets the internal state variables of the processor. */
     void reset();