Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 726 insertions, 0 deletions

diff --git a/dom/media/webaudio/PannerNode.cpp b/dom/media/webaudio/PannerNode.cpp
new file mode 100644
index 0000000000..63db0676ae
--- /dev/null
+++ b/dom/media/webaudio/PannerNode.cpp
@@ -0,0 +1,726 @@
+/* -*- 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 "PannerNode.h"
+#include "AlignmentUtils.h"
+#include "AudioDestinationNode.h"
+#include "AudioNodeEngine.h"
+#include "AudioNodeTrack.h"
+#include "AudioListener.h"
+#include "PanningUtils.h"
+#include "AudioBufferSourceNode.h"
+#include "PlayingRefChangeHandler.h"
+#include "blink/HRTFPanner.h"
+#include "blink/HRTFDatabaseLoader.h"
+#include "Tracing.h"
+
+using WebCore::HRTFDatabaseLoader;
+using WebCore::HRTFPanner;
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(PannerNode)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PannerNode, AudioNode)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPositionX, mPositionY, mPositionZ,
+                                  mOrientationX, mOrientationY, mOrientationZ)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PannerNode, AudioNode)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPositionX, mPositionY, mPositionZ,
+                                    mOrientationX, mOrientationY, mOrientationZ)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PannerNode)
+NS_INTERFACE_MAP_END_INHERITING(AudioNode)
+
+NS_IMPL_ADDREF_INHERITED(PannerNode, AudioNode)
+NS_IMPL_RELEASE_INHERITED(PannerNode, AudioNode)
+
+class PannerNodeEngine final : public AudioNodeEngine {
+ public:
+  explicit PannerNodeEngine(AudioNode* aNode,
+                            AudioDestinationNode* aDestination,
+                            AudioListenerEngine* aListenerEngine)
+      : AudioNodeEngine(aNode),
+        mDestination(aDestination->Track()),
+        mListenerEngine(aListenerEngine)
+        // Please keep these default values consistent with
+        // PannerNode::PannerNode below.
+        ,
+        mPanningModelFunction(&PannerNodeEngine::EqualPowerPanningFunction),
+        mDistanceModelFunction(&PannerNodeEngine::InverseGainFunction),
+        mPositionX(0.),
+        mPositionY(0.),
+        mPositionZ(0.),
+        mOrientationX(1.),
+        mOrientationY(0.),
+        mOrientationZ(0.),
+        mRefDistance(1.),
+        mMaxDistance(10000.),
+        mRolloffFactor(1.),
+        mConeInnerAngle(360.),
+        mConeOuterAngle(360.),
+        mConeOuterGain(0.),
+        mLeftOverData(INT_MIN) {}
+
+  void RecvTimelineEvent(uint32_t aIndex, AudioTimelineEvent& aEvent) override {
+    MOZ_ASSERT(mDestination);
+    WebAudioUtils::ConvertAudioTimelineEventToTicks(aEvent, mDestination);
+    switch (aIndex) {
+      case PannerNode::POSITIONX:
+        mPositionX.InsertEvent<int64_t>(aEvent);
+        break;
+      case PannerNode::POSITIONY:
+        mPositionY.InsertEvent<int64_t>(aEvent);
+        break;
+      case PannerNode::POSITIONZ:
+        mPositionZ.InsertEvent<int64_t>(aEvent);
+        break;
+      case PannerNode::ORIENTATIONX:
+        mOrientationX.InsertEvent<int64_t>(aEvent);
+        break;
+      case PannerNode::ORIENTATIONY:
+        mOrientationY.InsertEvent<int64_t>(aEvent);
+        break;
+      case PannerNode::ORIENTATIONZ:
+        mOrientationZ.InsertEvent<int64_t>(aEvent);
+        break;
+      default:
+        NS_ERROR("Bad PannerNode TimelineParameter");
+    }
+  }
+
+  void CreateHRTFPanner() {
+    MOZ_ASSERT(NS_IsMainThread());
+    if (mHRTFPanner) {
+      return;
+    }
+    // HRTFDatabaseLoader needs to be fetched on the main thread.
+    RefPtr<HRTFDatabaseLoader> loader =
+        HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(
+            NodeMainThread()->Context()->SampleRate());
+    mHRTFPanner = MakeUnique<HRTFPanner>(
+        NodeMainThread()->Context()->SampleRate(), loader.forget());
+  }
+
+  void SetInt32Parameter(uint32_t aIndex, int32_t aParam) override {
+    switch (aIndex) {
+      case PannerNode::PANNING_MODEL:
+        switch (PanningModelType(aParam)) {
+          case PanningModelType::Equalpower:
+            mPanningModelFunction =
+                &PannerNodeEngine::EqualPowerPanningFunction;
+            break;
+          case PanningModelType::HRTF:
+            mPanningModelFunction = &PannerNodeEngine::HRTFPanningFunction;
+            break;
+          default:
+            MOZ_ASSERT_UNREACHABLE("We should never see alternate names here");
+            break;
+        }
+        break;
+      case PannerNode::DISTANCE_MODEL:
+        switch (DistanceModelType(aParam)) {
+          case DistanceModelType::Inverse:
+            mDistanceModelFunction = &PannerNodeEngine::InverseGainFunction;
+            break;
+          case DistanceModelType::Linear:
+            mDistanceModelFunction = &PannerNodeEngine::LinearGainFunction;
+            break;
+          case DistanceModelType::Exponential:
+            mDistanceModelFunction = &PannerNodeEngine::ExponentialGainFunction;
+            break;
+          default:
+            MOZ_ASSERT_UNREACHABLE("We should never see alternate names here");
+            break;
+        }
+        break;
+      default:
+        NS_ERROR("Bad PannerNodeEngine Int32Parameter");
+    }
+  }
+  void SetDoubleParameter(uint32_t aIndex, double aParam) override {
+    switch (aIndex) {
+      case PannerNode::REF_DISTANCE:
+        mRefDistance = aParam;
+        break;
+      case PannerNode::MAX_DISTANCE:
+        mMaxDistance = aParam;
+        break;
+      case PannerNode::ROLLOFF_FACTOR:
+        mRolloffFactor = aParam;
+        break;
+      case PannerNode::CONE_INNER_ANGLE:
+        mConeInnerAngle = aParam;
+        break;
+      case PannerNode::CONE_OUTER_ANGLE:
+        mConeOuterAngle = aParam;
+        break;
+      case PannerNode::CONE_OUTER_GAIN:
+        mConeOuterGain = aParam;
+        break;
+      default:
+        NS_ERROR("Bad PannerNodeEngine DoubleParameter");
+    }
+  }
+
+  void ProcessBlock(AudioNodeTrack* aTrack, GraphTime aFrom,
+                    const AudioBlock& aInput, AudioBlock* aOutput,
+                    bool* aFinished) override {
+    TRACE("PannerNodeEngine::ProcessBlock");
+
+    if (aInput.IsNull()) {
+      // mLeftOverData != INT_MIN means that the panning model was HRTF and a
+      // tail-time reference was added.  Even if the model is now equalpower,
+      // the reference will need to be removed.
+      if (mLeftOverData > 0 &&
+          mPanningModelFunction == &PannerNodeEngine::HRTFPanningFunction) {
+        mLeftOverData -= WEBAUDIO_BLOCK_SIZE;
+      } else {
+        if (mLeftOverData != INT_MIN) {
+          mLeftOverData = INT_MIN;
+          aTrack->ScheduleCheckForInactive();
+          mHRTFPanner->reset();
+
+          RefPtr<PlayingRefChangeHandler> refchanged =
+              new PlayingRefChangeHandler(aTrack,
+                                          PlayingRefChangeHandler::RELEASE);
+          aTrack->Graph()->DispatchToMainThreadStableState(refchanged.forget());
+        }
+        aOutput->SetNull(WEBAUDIO_BLOCK_SIZE);
+        return;
+      }
+    } else if (mPanningModelFunction ==
+               &PannerNodeEngine::HRTFPanningFunction) {
+      if (mLeftOverData == INT_MIN) {
+        RefPtr<PlayingRefChangeHandler> refchanged =
+            new PlayingRefChangeHandler(aTrack,
+                                        PlayingRefChangeHandler::ADDREF);
+        aTrack->Graph()->DispatchToMainThreadStableState(refchanged.forget());
+      }
+      mLeftOverData = mHRTFPanner->maxTailFrames();
+    }
+
+    TrackTime tick = mDestination->GraphTimeToTrackTime(aFrom);
+    (this->*mPanningModelFunction)(aInput, aOutput, tick);
+  }
+
+  bool IsActive() const override { return mLeftOverData != INT_MIN; }
+
+  void ComputeAzimuthAndElevation(const ThreeDPoint& position, float& aAzimuth,
+                                  float& aElevation);
+  float ComputeConeGain(const ThreeDPoint& position,
+                        const ThreeDPoint& orientation);
+  // Compute how much the distance contributes to the gain reduction.
+  double ComputeDistanceGain(const ThreeDPoint& position);
+
+  void EqualPowerPanningFunction(const AudioBlock& aInput, AudioBlock* aOutput,
+                                 TrackTime tick);
+  void HRTFPanningFunction(const AudioBlock& aInput, AudioBlock* aOutput,
+                           TrackTime tick);
+
+  float LinearGainFunction(double aDistance);
+  float InverseGainFunction(double aDistance);
+  float ExponentialGainFunction(double aDistance);
+
+  ThreeDPoint ConvertAudioParamTimelineTo3DP(AudioParamTimeline& aX,
+                                             AudioParamTimeline& aY,
+                                             AudioParamTimeline& aZ,
+                                             TrackTime& tick);
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override {
+    size_t amount = AudioNodeEngine::SizeOfExcludingThis(aMallocSizeOf);
+    if (mHRTFPanner) {
+      amount += mHRTFPanner->sizeOfIncludingThis(aMallocSizeOf);
+    }
+
+    return amount;
+  }
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override {
+    return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+  }
+
+  RefPtr<AudioNodeTrack> mDestination;
+  // This member is set on the main thread, but is not accessed on the rendering
+  // thread untile mPanningModelFunction has changed, and this happens strictly
+  // later, via a MediaTrackGraph ControlMessage.
+  UniquePtr<HRTFPanner> mHRTFPanner;
+  RefPtr<AudioListenerEngine> mListenerEngine;
+  typedef void (PannerNodeEngine::*PanningModelFunction)(
+      const AudioBlock& aInput, AudioBlock* aOutput, TrackTime tick);
+  PanningModelFunction mPanningModelFunction;
+  typedef float (PannerNodeEngine::*DistanceModelFunction)(double aDistance);
+  DistanceModelFunction mDistanceModelFunction;
+  AudioParamTimeline mPositionX;
+  AudioParamTimeline mPositionY;
+  AudioParamTimeline mPositionZ;
+  AudioParamTimeline mOrientationX;
+  AudioParamTimeline mOrientationY;
+  AudioParamTimeline mOrientationZ;
+  double mRefDistance;
+  double mMaxDistance;
+  double mRolloffFactor;
+  double mConeInnerAngle;
+  double mConeOuterAngle;
+  double mConeOuterGain;
+  int mLeftOverData;
+};
+
+PannerNode::PannerNode(AudioContext* aContext)
+    : AudioNode(aContext, 2, ChannelCountMode::Clamped_max,
+                ChannelInterpretation::Speakers)
+      // Please keep these default values consistent with
+      // PannerNodeEngine::PannerNodeEngine above.
+      ,
+      mPanningModel(PanningModelType::Equalpower),
+      mDistanceModel(DistanceModelType::Inverse),
+      mRefDistance(1.),
+      mMaxDistance(10000.),
+      mRolloffFactor(1.),
+      mConeInnerAngle(360.),
+      mConeOuterAngle(360.),
+      mConeOuterGain(0.) {
+  mPositionX = CreateAudioParam(PannerNode::POSITIONX, u"PositionX"_ns, 0.f);
+  mPositionY = CreateAudioParam(PannerNode::POSITIONY, u"PositionY"_ns, 0.f);
+  mPositionZ = CreateAudioParam(PannerNode::POSITIONZ, u"PositionZ"_ns, 0.f);
+  mOrientationX =
+      CreateAudioParam(PannerNode::ORIENTATIONX, u"OrientationX"_ns, 1.0f);
+  mOrientationY =
+      CreateAudioParam(PannerNode::ORIENTATIONY, u"OrientationY"_ns, 0.f);
+  mOrientationZ =
+      CreateAudioParam(PannerNode::ORIENTATIONZ, u"OrientationZ"_ns, 0.f);
+  mTrack = AudioNodeTrack::Create(
+      aContext,
+      new PannerNodeEngine(this, aContext->Destination(),
+                           aContext->Listener()->Engine()),
+      AudioNodeTrack::NO_TRACK_FLAGS, aContext->Graph());
+}
+
+/* static */
+already_AddRefed<PannerNode> PannerNode::Create(AudioContext& aAudioContext,
+                                                const PannerOptions& aOptions,
+                                                ErrorResult& aRv) {
+  RefPtr<PannerNode> audioNode = new PannerNode(&aAudioContext);
+
+  audioNode->Initialize(aOptions, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  audioNode->SetPanningModel(aOptions.mPanningModel);
+  audioNode->SetDistanceModel(aOptions.mDistanceModel);
+  audioNode->mPositionX->SetInitialValue(aOptions.mPositionX);
+  audioNode->mPositionY->SetInitialValue(aOptions.mPositionY);
+  audioNode->mPositionZ->SetInitialValue(aOptions.mPositionZ);
+  audioNode->mOrientationX->SetInitialValue(aOptions.mOrientationX);
+  audioNode->mOrientationY->SetInitialValue(aOptions.mOrientationY);
+  audioNode->mOrientationZ->SetInitialValue(aOptions.mOrientationZ);
+  audioNode->SetRefDistance(aOptions.mRefDistance, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+  audioNode->SetMaxDistance(aOptions.mMaxDistance, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+  audioNode->SetRolloffFactor(aOptions.mRolloffFactor, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+  audioNode->SetConeInnerAngle(aOptions.mConeInnerAngle);
+  audioNode->SetConeOuterAngle(aOptions.mConeOuterAngle);
+  audioNode->SetConeOuterGain(aOptions.mConeOuterGain, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  return audioNode.forget();
+}
+
+void PannerNode::SetPanningModel(PanningModelType aPanningModel) {
+  mPanningModel = aPanningModel;
+  if (mPanningModel == PanningModelType::HRTF) {
+    // We can set the engine's `mHRTFPanner` member here from the main thread,
+    // because the engine will not touch it from the MediaTrackGraph
+    // thread until the PANNING_MODEL message sent below is received.
+    static_cast<PannerNodeEngine*>(mTrack->Engine())->CreateHRTFPanner();
+  }
+  SendInt32ParameterToTrack(PANNING_MODEL, int32_t(mPanningModel));
+}
+
+static bool SetParamFromDouble(AudioParam* aParam, double aValue,
+                               const char (&aParamName)[2], ErrorResult& aRv) {
+  float value = static_cast<float>(aValue);
+  if (!mozilla::IsFinite(value)) {
+    aRv.ThrowTypeError<MSG_NOT_FINITE>(aParamName);
+    return false;
+  }
+  aParam->SetValue(value, aRv);
+  return !aRv.Failed();
+}
+
+void PannerNode::SetPosition(double aX, double aY, double aZ,
+                             ErrorResult& aRv) {
+  if (!SetParamFromDouble(mPositionX, aX, "x", aRv)) {
+    return;
+  }
+  if (!SetParamFromDouble(mPositionY, aY, "y", aRv)) {
+    return;
+  }
+  SetParamFromDouble(mPositionZ, aZ, "z", aRv);
+}
+
+void PannerNode::SetOrientation(double aX, double aY, double aZ,
+                                ErrorResult& aRv) {
+  if (!SetParamFromDouble(mOrientationX, aX, "x", aRv)) {
+    return;
+  }
+  if (!SetParamFromDouble(mOrientationY, aY, "y", aRv)) {
+    return;
+  }
+  SetParamFromDouble(mOrientationZ, aZ, "z", aRv);
+}
+
+size_t PannerNode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
+  return AudioNode::SizeOfExcludingThis(aMallocSizeOf);
+}
+
+size_t PannerNode::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+  return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}
+
+JSObject* PannerNode::WrapObject(JSContext* aCx,
+                                 JS::Handle<JSObject*> aGivenProto) {
+  return PannerNode_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+// Those three functions are described in the spec.
+float PannerNodeEngine::LinearGainFunction(double aDistance) {
+  return 1 - mRolloffFactor *
+                 (std::max(std::min(aDistance, mMaxDistance), mRefDistance) -
+                  mRefDistance) /
+                 (mMaxDistance - mRefDistance);
+}
+
+float PannerNodeEngine::InverseGainFunction(double aDistance) {
+  return mRefDistance /
+         (mRefDistance +
+          mRolloffFactor * (std::max(aDistance, mRefDistance) - mRefDistance));
+}
+
+float PannerNodeEngine::ExponentialGainFunction(double aDistance) {
+  return pow(std::max(aDistance, mRefDistance) / mRefDistance, -mRolloffFactor);
+}
+
+void PannerNodeEngine::HRTFPanningFunction(const AudioBlock& aInput,
+                                           AudioBlock* aOutput,
+                                           TrackTime tick) {
+  // The output of this node is always stereo, no matter what the inputs are.
+  aOutput->AllocateChannels(2);
+
+  float azimuth, elevation;
+
+  ThreeDPoint position =
+      ConvertAudioParamTimelineTo3DP(mPositionX, mPositionY, mPositionZ, tick);
+  ThreeDPoint orientation = ConvertAudioParamTimelineTo3DP(
+      mOrientationX, mOrientationY, mOrientationZ, tick);
+  if (!orientation.IsZero()) {
+    orientation.Normalize();
+  }
+  ComputeAzimuthAndElevation(position, azimuth, elevation);
+
+  AudioBlock input = aInput;
+  // Gain is applied before the delay and convolution of the HRTF.
+  input.mVolume *=
+      ComputeConeGain(position, orientation) * ComputeDistanceGain(position);
+
+  mHRTFPanner->pan(azimuth, elevation, &input, aOutput);
+}
+
+ThreeDPoint PannerNodeEngine::ConvertAudioParamTimelineTo3DP(
+    AudioParamTimeline& aX, AudioParamTimeline& aY, AudioParamTimeline& aZ,
+    TrackTime& tick) {
+  return ThreeDPoint(aX.GetValueAtTime(tick), aY.GetValueAtTime(tick),
+                     aZ.GetValueAtTime(tick));
+}
+
+void PannerNodeEngine::EqualPowerPanningFunction(const AudioBlock& aInput,
+                                                 AudioBlock* aOutput,
+                                                 TrackTime tick) {
+  float azimuth, elevation, gainL, gainR, normalizedAzimuth, distanceGain,
+      coneGain;
+  int inputChannels = aInput.ChannelCount();
+
+  // Optimize the case where the position and orientation is constant for this
+  // processing block: we can just apply a constant gain on the left and right
+  // channel
+  if (mPositionX.HasSimpleValue() && mPositionY.HasSimpleValue() &&
+      mPositionZ.HasSimpleValue() && mOrientationX.HasSimpleValue() &&
+      mOrientationY.HasSimpleValue() && mOrientationZ.HasSimpleValue()) {
+    ThreeDPoint position = ConvertAudioParamTimelineTo3DP(
+        mPositionX, mPositionY, mPositionZ, tick);
+    ThreeDPoint orientation = ConvertAudioParamTimelineTo3DP(
+        mOrientationX, mOrientationY, mOrientationZ, tick);
+    if (!orientation.IsZero()) {
+      orientation.Normalize();
+    }
+
+    // For a stereo source, when both the listener and the panner are in
+    // the same spot, and no cone gain is specified, this node is noop.
+    if (inputChannels == 2 && mListenerEngine->Position() == position &&
+        mConeInnerAngle == 360 && mConeOuterAngle == 360) {
+      *aOutput = aInput;
+      return;
+    }
+
+    ComputeAzimuthAndElevation(position, azimuth, elevation);
+    coneGain = ComputeConeGain(position, orientation);
+
+    // The following algorithm is described in the spec.
+    // Clamp azimuth in the [-90, 90] range.
+    azimuth = std::min(180.f, std::max(-180.f, azimuth));
+
+    // Wrap around
+    if (azimuth < -90.f) {
+      azimuth = -180.f - azimuth;
+    } else if (azimuth > 90) {
+      azimuth = 180.f - azimuth;
+    }
+
+    // Normalize the value in the [0, 1] range.
+    if (inputChannels == 1) {
+      normalizedAzimuth = (azimuth + 90.f) / 180.f;
+    } else {
+      if (azimuth <= 0) {
+        normalizedAzimuth = (azimuth + 90.f) / 90.f;
+      } else {
+        normalizedAzimuth = azimuth / 90.f;
+      }
+    }
+
+    distanceGain = ComputeDistanceGain(position);
+
+    // Actually compute the left and right gain.
+    gainL = cos(0.5 * M_PI * normalizedAzimuth);
+    gainR = sin(0.5 * M_PI * normalizedAzimuth);
+
+    // Compute the output.
+    ApplyStereoPanning(aInput, aOutput, gainL, gainR, azimuth <= 0);
+
+    aOutput->mVolume *= distanceGain * coneGain;
+  } else {
+    float positionX[WEBAUDIO_BLOCK_SIZE];
+    float positionY[WEBAUDIO_BLOCK_SIZE];
+    float positionZ[WEBAUDIO_BLOCK_SIZE];
+    float orientationX[WEBAUDIO_BLOCK_SIZE];
+    float orientationY[WEBAUDIO_BLOCK_SIZE];
+    float orientationZ[WEBAUDIO_BLOCK_SIZE];
+
+    if (!mPositionX.HasSimpleValue()) {
+      mPositionX.GetValuesAtTime(tick, positionX, WEBAUDIO_BLOCK_SIZE);
+    } else {
+      positionX[0] = mPositionX.GetValueAtTime(tick);
+    }
+    if (!mPositionY.HasSimpleValue()) {
+      mPositionY.GetValuesAtTime(tick, positionY, WEBAUDIO_BLOCK_SIZE);
+    } else {
+      positionY[0] = mPositionY.GetValueAtTime(tick);
+    }
+    if (!mPositionZ.HasSimpleValue()) {
+      mPositionZ.GetValuesAtTime(tick, positionZ, WEBAUDIO_BLOCK_SIZE);
+    } else {
+      positionZ[0] = mPositionZ.GetValueAtTime(tick);
+    }
+    if (!mOrientationX.HasSimpleValue()) {
+      mOrientationX.GetValuesAtTime(tick, orientationX, WEBAUDIO_BLOCK_SIZE);
+    } else {
+      orientationX[0] = mOrientationX.GetValueAtTime(tick);
+    }
+    if (!mOrientationY.HasSimpleValue()) {
+      mOrientationY.GetValuesAtTime(tick, orientationY, WEBAUDIO_BLOCK_SIZE);
+    } else {
+      orientationY[0] = mOrientationY.GetValueAtTime(tick);
+    }
+    if (!mOrientationZ.HasSimpleValue()) {
+      mOrientationZ.GetValuesAtTime(tick, orientationZ, WEBAUDIO_BLOCK_SIZE);
+    } else {
+      orientationZ[0] = mOrientationZ.GetValueAtTime(tick);
+    }
+
+    float buffer[3 * WEBAUDIO_BLOCK_SIZE + 4];
+    bool onLeft[WEBAUDIO_BLOCK_SIZE];
+
+    float* alignedPanningL = ALIGNED16(buffer);
+    float* alignedPanningR = alignedPanningL + WEBAUDIO_BLOCK_SIZE;
+    float* alignedGain = alignedPanningR + WEBAUDIO_BLOCK_SIZE;
+    ASSERT_ALIGNED16(alignedPanningL);
+    ASSERT_ALIGNED16(alignedPanningR);
+    ASSERT_ALIGNED16(alignedGain);
+
+    for (size_t counter = 0; counter < WEBAUDIO_BLOCK_SIZE; ++counter) {
+      ThreeDPoint position(
+          mPositionX.HasSimpleValue() ? positionX[0] : positionX[counter],
+          mPositionY.HasSimpleValue() ? positionY[0] : positionY[counter],
+          mPositionZ.HasSimpleValue() ? positionZ[0] : positionZ[counter]);
+      ThreeDPoint orientation(
+          mOrientationX.HasSimpleValue() ? orientationX[0]
+                                         : orientationX[counter],
+          mOrientationY.HasSimpleValue() ? orientationY[0]
+                                         : orientationY[counter],
+          mOrientationZ.HasSimpleValue() ? orientationZ[0]
+                                         : orientationZ[counter]);
+      if (!orientation.IsZero()) {
+        orientation.Normalize();
+      }
+
+      ComputeAzimuthAndElevation(position, azimuth, elevation);
+      coneGain = ComputeConeGain(position, orientation);
+
+      // The following algorithm is described in the spec.
+      // Clamp azimuth in the [-90, 90] range.
+      azimuth = std::min(180.f, std::max(-180.f, azimuth));
+
+      // Wrap around
+      if (azimuth < -90.f) {
+        azimuth = -180.f - azimuth;
+      } else if (azimuth > 90) {
+        azimuth = 180.f - azimuth;
+      }
+
+      // Normalize the value in the [0, 1] range.
+      if (inputChannels == 1) {
+        normalizedAzimuth = (azimuth + 90.f) / 180.f;
+      } else {
+        if (azimuth <= 0) {
+          normalizedAzimuth = (azimuth + 90.f) / 90.f;
+        } else {
+          normalizedAzimuth = azimuth / 90.f;
+        }
+      }
+
+      distanceGain = ComputeDistanceGain(position);
+
+      // Actually compute the left and right gain.
+      float gainL = cos(0.5 * M_PI * normalizedAzimuth);
+      float gainR = sin(0.5 * M_PI * normalizedAzimuth);
+
+      alignedPanningL[counter] = gainL;
+      alignedPanningR[counter] = gainR;
+      alignedGain[counter] = distanceGain * coneGain;
+      onLeft[counter] = azimuth <= 0;
+    }
+
+    // Apply the panning to the output buffer
+    ApplyStereoPanning(aInput, aOutput, alignedPanningL, alignedPanningR,
+                       onLeft);
+
+    // Apply the input volume, cone and distance gain to the output buffer.
+    float* outputL = aOutput->ChannelFloatsForWrite(0);
+    float* outputR = aOutput->ChannelFloatsForWrite(1);
+    AudioBlockInPlaceScale(outputL, alignedGain);
+    AudioBlockInPlaceScale(outputR, alignedGain);
+  }
+}
+
+// This algorithm is specified in the webaudio spec.
+void PannerNodeEngine::ComputeAzimuthAndElevation(const ThreeDPoint& position,
+                                                  float& aAzimuth,
+                                                  float& aElevation) {
+  ThreeDPoint sourceListener = position - mListenerEngine->Position();
+  if (sourceListener.IsZero()) {
+    aAzimuth = 0.0;
+    aElevation = 0.0;
+    return;
+  }
+
+  sourceListener.Normalize();
+
+  // Project the source-listener vector on the x-z plane.
+  const ThreeDPoint& listenerFront = mListenerEngine->FrontVector();
+  const ThreeDPoint& listenerRight = mListenerEngine->RightVector();
+  ThreeDPoint up = listenerRight.CrossProduct(listenerFront);
+
+  double upProjection = sourceListener.DotProduct(up);
+  aElevation = 90 - 180 * acos(upProjection) / M_PI;
+
+  if (aElevation > 90) {
+    aElevation = 180 - aElevation;
+  } else if (aElevation < -90) {
+    aElevation = -180 - aElevation;
+  }
+
+  ThreeDPoint projectedSource = sourceListener - up * upProjection;
+  if (projectedSource.IsZero()) {
+    // source - listener direction is up or down.
+    aAzimuth = 0.0;
+    return;
+  }
+  projectedSource.Normalize();
+
+  // Actually compute the angle, and convert to degrees
+  double projection = projectedSource.DotProduct(listenerRight);
+  aAzimuth = 180 * acos(projection) / M_PI;
+
+  // Compute whether the source is in front or behind the listener.
+  double frontBack = projectedSource.DotProduct(listenerFront);
+  if (frontBack < 0) {
+    aAzimuth = 360 - aAzimuth;
+  }
+  // Rotate the azimuth so it is relative to the listener front vector instead
+  // of the right vector.
+  if ((aAzimuth >= 0) && (aAzimuth <= 270)) {
+    aAzimuth = 90 - aAzimuth;
+  } else {
+    aAzimuth = 450 - aAzimuth;
+  }
+}
+
+// This algorithm is described in the WebAudio spec.
+float PannerNodeEngine::ComputeConeGain(const ThreeDPoint& position,
+                                        const ThreeDPoint& orientation) {
+  // Omnidirectional source
+  if (orientation.IsZero() ||
+      ((mConeInnerAngle == 360) && (mConeOuterAngle == 360))) {
+    return 1;
+  }
+
+  // Normalized source-listener vector
+  ThreeDPoint sourceToListener = mListenerEngine->Position() - position;
+  sourceToListener.Normalize();
+
+  // Angle between the source orientation vector and the source-listener vector
+  double dotProduct = sourceToListener.DotProduct(orientation);
+  double angle = 180 * acos(dotProduct) / M_PI;
+  double absAngle = fabs(angle);
+
+  // Divide by 2 here since API is entire angle (not half-angle)
+  double absInnerAngle = fabs(mConeInnerAngle) / 2;
+  double absOuterAngle = fabs(mConeOuterAngle) / 2;
+  double gain = 1;
+
+  if (absAngle <= absInnerAngle) {
+    // No attenuation
+    gain = 1;
+  } else if (absAngle >= absOuterAngle) {
+    // Max attenuation
+    gain = mConeOuterGain;
+  } else {
+    // Between inner and outer cones
+    // inner -> outer, x goes from 0 -> 1
+    double x = (absAngle - absInnerAngle) / (absOuterAngle - absInnerAngle);
+    gain = (1 - x) + mConeOuterGain * x;
+  }
+
+  return gain;
+}
+
+double PannerNodeEngine::ComputeDistanceGain(const ThreeDPoint& position) {
+  ThreeDPoint distanceVec = position - mListenerEngine->Position();
+  float distance = sqrt(distanceVec.DotProduct(distanceVec));
+  return std::max(0.0f, (this->*mDistanceModelFunction)(distance));
+}
+
+}  // namespace mozilla::dom