Move utility functions for sample rate to AudioUtilities.

Source/modules/webaudio/MediaElementAudioSourceNode.cpp

 /*
  * Copyright (C) 2011, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
 #include "modules/webaudio/MediaElementAudioSourceNode.h"
 
 #include "core/html/HTMLMediaElement.h"
 #include "modules/webaudio/AudioContext.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "platform/Logging.h"
+#include "platform/audio/AudioUtilities.h"
 #include "platform/graphics/media/MediaPlayer.h"
 #include "wtf/Locker.h"
 
-// These are somewhat arbitrary limits, but we need to do some kind of sanity-checking.
-const unsigned minSampleRate = 8000;
-const unsigned maxSampleRate = 192000;
-
 namespace blink {
 
 MediaElementAudioSourceNode* MediaElementAudioSourceNode::create(AudioContext* context, HTMLMediaElement* mediaElement)
 {
     return adoptRefCountedGarbageCollectedWillBeNoop(new MediaElementAudioSourceNode(context, mediaElement));
 }
 
 MediaElementAudioSourceNode::MediaElementAudioSourceNode(AudioContext* context, HTMLMediaElement* mediaElement)
     : AudioSourceNode(context, context->sampleRate())
     , m_mediaElement(mediaElement)
@@ skipping 17 matching lines @@
 void MediaElementAudioSourceNode::dispose()
 {
     m_mediaElement->setAudioSourceNode(0);
     uninitialize();
     AudioSourceNode::dispose();
 }
 
 void MediaElementAudioSourceNode::setFormat(size_t numberOfChannels, float sourceSampleRate)
 {
     if (numberOfChannels != m_sourceNumberOfChannels || sourceSampleRate != m_sourceSampleRate) {
-        if (!numberOfChannels || numberOfChannels > AudioContext::maxNumberOfChannels() || sourceSampleRate < minSampleRate || sourceSampleRate > maxSampleRate) {
+        if (!numberOfChannels || numberOfChannels > AudioContext::maxNumberOfChannels() || !AudioUtilities::isValidAudioBufferSampleRate(sourceSampleRate)) {
             // process() will generate silence for these uninitialized values.
             WTF_LOG(Media, "MediaElementAudioSourceNode::setFormat(%u, %f) - unhandled format change", static_cast<unsigned>(numberOfChannels), sourceSampleRate);
             m_sourceNumberOfChannels = 0;
             m_sourceSampleRate = 0;
             return;
         }
 
         m_sourceNumberOfChannels = numberOfChannels;
         m_sourceSampleRate = sourceSampleRate;
 
@@ skipping 65 matching lines @@
 void MediaElementAudioSourceNode::trace(Visitor* visitor)
 {
     visitor->trace(m_mediaElement);
     AudioSourceNode::trace(visitor);
     AudioSourceProviderClient::trace(visitor);
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)