Corrects sample rate initialization for Core Audio.

src/org/jitsi/impl/neomedia/device/MacCoreaudioSystem.java

@@ -266,13 +266,12 @@ private static double getSupportedSampleRate(
             boolean input,
             String deviceUID)
     {
-        double supportedSampleRate = MacCoreAudioDevice.DEFAULT_SAMPLE_RATE;
-        double defaultSampleRate
+        double supportedSampleRate
             = MacCoreAudioDevice.getNominalSampleRate(deviceUID);
 
-        if (defaultSampleRate >= MediaUtils.MAX_AUDIO_SAMPLE_RATE)
+        if(supportedSampleRate >= MediaUtils.MAX_AUDIO_SAMPLE_RATE)
         {
-            supportedSampleRate = defaultSampleRate;
+            supportedSampleRate = MacCoreAudioDevice.DEFAULT_SAMPLE_RATE;
         }
 
         return supportedSampleRate;

src/org/jitsi/impl/neomedia/jmfext/media/renderer/audio/MacCoreaudioRenderer.java

@@ -319,6 +319,12 @@ public void open()
                         throw new ResourceUnavailableException(
                                 "No locator/MediaLocator is set.");
                     }
+
+                    if (inputFormat == null)
+                    {
+                        throw new ResourceUnavailableException(
+                                "inputFormat not set");
+                    }
                 }
                 finally
                 {