comparison data/model/RangeSummarisableTimeValueModel.h @ 377:166c22eff678

* Ensure waveforms are strictly correct even when using a non-power-of-two
  non-power-of-sqrt-two block size with cacheing off and painting only small
  areas at a time

      * the given number of underlying sample frames, summarised at a
      * block size equal to the distance between start and end frames.
      */
     virtual Range getSummary(size_t channel, size_t start, size_t count) const = 0;
 
+    virtual size_t getSummaryBlockSize(size_t desired) const = 0;
+
     QString getTypeName() const { return tr("Range-Summarisable Time-Value"); }
 };
 
 #endif