# HG changeset patch
# User Chris Cannam
# Date 1317212689 -3600
# Node ID f853dfb200debc49d3de1ce6872b393664ad6d40
# Parent  6a730f6bd010a214bbaa86d01a7e03bf9ab778cd
Avoid creating a time stretcher if no sample rate set (SF bug #3376634)

diff -r 6a730f6bd010 -r f853dfb200de audioio/AudioCallbackPlaySource.cpp
--- a/audioio/AudioCallbackPlaySource.cpp	Wed Sep 28 10:17:35 2011 +0100
+++ b/audioio/AudioCallbackPlaySource.cpp	Wed Sep 28 13:24:49 2011 +0100
@@ -896,8 +896,16 @@
 void
 AudioCallbackPlaySource::setTargetSampleRate(size_t sr)
 {
+    bool first = (m_targetSampleRate == 0);
+
     m_targetSampleRate = sr;
     initialiseConverter();
+
+    if (first && (m_stretchRatio != 1.f)) {
+        // couldn't create a stretcher before because we had no sample
+        // rate: make one now
+        setTimeStretch(m_stretchRatio);
+    }
 }
 
 void
@@ -1034,6 +1042,8 @@
 {
     m_stretchRatio = factor;
 
+    if (!getTargetSampleRate()) return; // have to make our stretcher later
+
     if (m_timeStretcher || (factor == 1.f)) {
         // stretch ratio will be set in next process call if appropriate
     } else {