Extending supported sample rate from 3.0KHz to 192.0KHz for OfflineAudioContext.

Source/platform/audio/HRTFPanner.cpp

Index: Source/platform/audio/HRTFPanner.cpp
diff --git a/Source/platform/audio/HRTFPanner.cpp b/Source/platform/audio/HRTFPanner.cpp
index 63d9fc49628394fbba237fa1de46c6c77615b84d..7f5fb5d3e6178165d183732c4de956358b26738b 100644
--- a/Source/platform/audio/HRTFPanner.cpp
+++ b/Source/platform/audio/HRTFPanner.cpp
@@ -79,8 +79,18 @@ size_t HRTFPanner::fftSizeForSampleRate(float sampleRate)
     // The HRTF impulse responses (loaded as audio resources) are 512 sample-frames @44.1KHz.
     // Currently, we truncate the impulse responses to half this size, but an FFT-size of twice impulse response size is needed (for convolution).
     // So for sample rates around 44.1KHz an FFT size of 512 is good. We double the FFT-size only for sample rates at least double this.
-    ASSERT(sampleRate >= 44100 && sampleRate <= 96000.0);
-    return (sampleRate < 88200.0) ? 512 : 1024;
+    ASSERT(sampleRate >= 22050 && sampleRate <= 96000.0);
+
+    size_t fftSize = 256;
+
+    if (sampleRate < 44100)
+        fftSize = 256;
+    else if (sampleRate >= 44100 && sampleRate < 88200.0)
+        fftSize = 512;
+    else if (sampleRate < 88200.0)

[Inactive, 2014/07/15 15:49:40]

I am guessing you want '>', not '>'. We could simplify like this:
size_t fftSize = 512;
if (sampleRate < 44100.f)
  fftSize = 256;
else if (sampleRate > 88200.f)
  fftSize = 1024;

+        fftSize = 1024;
+
+    return fftSize;
 }
 
 void HRTFPanner::reset()