Move utility functions for sample rate to AudioUtilities.

Source/modules/webaudio/AudioBuffer.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 17 matching lines @@
 
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
 #include "modules/webaudio/AudioBuffer.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
+#include "modules/webaudio/AudioContext.h"
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/AudioFileReader.h"
-#include "modules/webaudio/AudioContext.h"
+#include "platform/audio/AudioUtilities.h"
 
 namespace blink {
 
-float AudioBuffer::minAllowedSampleRate()
-{
-    // crbug.com/344375
-    return 3000;
-}
-
-float AudioBuffer::maxAllowedSampleRate()
-{
-    // Windows can support up to this rate.
-    return 192000;
-}
-
 AudioBuffer* AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
 {
-    if (sampleRate < minAllowedSampleRate() || sampleRate > maxAllowedSampleRate() || numberOfChannels > AudioContext::maxNumberOfChannels() || !numberOfChannels || !numberOfFrames)
+    if (!AudioUtilities::isValidAudioBufferSampleRate(sampleRate) || numberOfChannels > AudioContext::maxNumberOfChannels() || !numberOfChannels || !numberOfFrames)
         return 0;
 
     AudioBuffer* buffer = new AudioBuffer(numberOfChannels, numberOfFrames, sampleRate);
 
     if (!buffer->createdSuccessfully(numberOfChannels))
         return 0;
     return buffer;
 }
 
 AudioBuffer* AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
 {
     if (!numberOfChannels || numberOfChannels > AudioContext::maxNumberOfChannels()) {
         exceptionState.throwDOMException(
             NotSupportedError,
             ExceptionMessages::indexOutsideRange(
                 "number of channels",
                 numberOfChannels,
                 1u,
                 ExceptionMessages::InclusiveBound,
                 AudioContext::maxNumberOfChannels(),
                 ExceptionMessages::InclusiveBound));
         return 0;
     }
 
-    if (sampleRate < AudioBuffer::minAllowedSampleRate() || sampleRate > AudioBuffer::maxAllowedSampleRate()) {
+    if (!AudioUtilities::isValidAudioBufferSampleRate(sampleRate)) {
         exceptionState.throwDOMException(
             NotSupportedError,
             ExceptionMessages::indexOutsideRange(
                 "sample rate",
                 sampleRate,
-                AudioBuffer::minAllowedSampleRate(),
+                AudioUtilities::minAudioBufferSampleRate(),
                 ExceptionMessages::InclusiveBound,
-                AudioBuffer::maxAllowedSampleRate(),
+                AudioUtilities::maxAudioBufferSampleRate(),
                 ExceptionMessages::InclusiveBound));
         return 0;
     }
 
     if (!numberOfFrames) {
         exceptionState.throwDOMException(
             NotSupportedError,
             ExceptionMessages::indexExceedsMinimumBound(
                 "number of frames",
                 numberOfFrames,
@@ skipping 105 matching lines @@
 {
     for (unsigned i = 0; i < m_channels.size(); ++i) {
         if (getChannelData(i))
             getChannelData(i)->zeroRange(0, length());
     }
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)