diff -r 000000000000 -r 6474c204b198 content/media/webaudio/WebAudioUtils.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/webaudio/WebAudioUtils.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,110 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WebAudioUtils.h"
+#include "AudioNodeStream.h"
+#include "AudioParamTimeline.h"
+#include "blink/HRTFDatabaseLoader.h"
+#include "speex/speex_resampler.h"
+
+namespace mozilla {
+
+namespace dom {
+
+struct ConvertTimeToTickHelper
+{
+  AudioNodeStream* mSourceStream;
+  AudioNodeStream* mDestinationStream;
+
+  static int64_t Convert(double aTime, void* aClosure)
+  {
+    ConvertTimeToTickHelper* This = static_cast<ConvertTimeToTickHelper*> (aClosure);
+    MOZ_ASSERT(This->mSourceStream->SampleRate() == This->mDestinationStream->SampleRate());
+    return This->mSourceStream->
+      TicksFromDestinationTime(This->mDestinationStream, aTime);
+  }
+};
+
+void
+WebAudioUtils::ConvertAudioParamToTicks(AudioParamTimeline& aParam,
+                                        AudioNodeStream* aSource,
+                                        AudioNodeStream* aDest)
+{
+  MOZ_ASSERT(!aSource || aSource->SampleRate() == aDest->SampleRate());
+  ConvertTimeToTickHelper ctth;
+  ctth.mSourceStream = aSource;
+  ctth.mDestinationStream = aDest;
+  aParam.ConvertEventTimesToTicks(ConvertTimeToTickHelper::Convert, &ctth, aDest->SampleRate());
+}
+
+void
+WebAudioUtils::Shutdown()
+{
+  WebCore::HRTFDatabaseLoader::shutdown();
+}
+
+int
+WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
+                                     uint32_t aChannel,
+                                     const float* aIn, uint32_t* aInLen,
+                                     float* aOut, uint32_t* aOutLen)
+{
+#ifdef MOZ_SAMPLE_TYPE_S16
+  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp1;
+  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp2;
+  tmp1.SetLength(*aInLen);
+  tmp2.SetLength(*aOutLen);
+  ConvertAudioSamples(aIn, tmp1.Elements(), *aInLen);
+  int result = speex_resampler_process_int(aResampler, aChannel, tmp1.Elements(), aInLen, tmp2.Elements(), aOutLen);
+  ConvertAudioSamples(tmp2.Elements(), aOut, *aOutLen);
+  return result;
+#else
+  return speex_resampler_process_float(aResampler, aChannel, aIn, aInLen, aOut, aOutLen);
+#endif
+}
+
+int
+WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
+                                     uint32_t aChannel,
+                                     const int16_t* aIn, uint32_t* aInLen,
+                                     float* aOut, uint32_t* aOutLen)
+{
+  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp;
+#ifdef MOZ_SAMPLE_TYPE_S16
+  tmp.SetLength(*aOutLen);
+  int result = speex_resampler_process_int(aResampler, aChannel, aIn, aInLen, tmp.Elements(), aOutLen);
+  ConvertAudioSamples(tmp.Elements(), aOut, *aOutLen);
+  return result;
+#else
+  tmp.SetLength(*aInLen);
+  ConvertAudioSamples(aIn, tmp.Elements(), *aInLen);
+  int result = speex_resampler_process_float(aResampler, aChannel, tmp.Elements(), aInLen, aOut, aOutLen);
+  return result;
+#endif
+}
+
+int
+WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
+                                     uint32_t aChannel,
+                                     const int16_t* aIn, uint32_t* aInLen,
+                                     int16_t* aOut, uint32_t* aOutLen)
+{
+#ifdef MOZ_SAMPLE_TYPE_S16
+  return speex_resampler_process_int(aResampler, aChannel, aIn, aInLen, aOut, aOutLen);
+#else
+  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp1;
+  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp2;
+  tmp1.SetLength(*aInLen);
+  tmp2.SetLength(*aOutLen);
+  ConvertAudioSamples(aIn, tmp1.Elements(), *aInLen);
+  int result = speex_resampler_process_float(aResampler, aChannel, tmp1.Elements(), aInLen, tmp2.Elements(), aOutLen);
+  ConvertAudioSamples(tmp2.Elements(), aOut, *aOutLen);
+  return result;
+#endif
+}
+
+}
+}