Add m-esr52 at 52.6.0

1 files changed, 199 insertions, 0 deletions

diff --git a/dom/media/webaudio/AudioParam.cpp b/dom/media/webaudio/AudioParam.cpp
new file mode 100644
index 000000000..6f5574993
--- /dev/null
+++ b/dom/media/webaudio/AudioParam.cpp
@@ -0,0 +1,199 @@
+/* -*- 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 "AudioParam.h"
+#include "mozilla/dom/AudioParamBinding.h"
+#include "AudioNodeEngine.h"
+#include "AudioNodeStream.h"
+#include "AudioContext.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(AudioParam)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AudioParam)
+  tmp->DisconnectFromGraphAndDestroyStream();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mNode)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AudioParam)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNode)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(AudioParam)
+
+NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(AudioParam)
+NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE(AudioParam)
+
+NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioParam, AddRef)
+NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioParam, Release)
+
+AudioParam::AudioParam(AudioNode* aNode,
+                       uint32_t aIndex,
+                       float aDefaultValue,
+                       const char* aName)
+  : AudioParamTimeline(aDefaultValue)
+  , mNode(aNode)
+  , mName(aName)
+  , mIndex(aIndex)
+  , mDefaultValue(aDefaultValue)
+{
+}
+
+AudioParam::~AudioParam()
+{
+  DisconnectFromGraphAndDestroyStream();
+}
+
+JSObject*
+AudioParam::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return AudioParamBinding::Wrap(aCx, this, aGivenProto);
+}
+
+void
+AudioParam::DisconnectFromGraphAndDestroyStream()
+{
+  MOZ_ASSERT(mRefCnt.get() > mInputNodes.Length(),
+             "Caller should be holding a reference or have called "
+             "mRefCnt.stabilizeForDeletion()");
+
+  while (!mInputNodes.IsEmpty()) {
+    uint32_t i = mInputNodes.Length() - 1;
+    RefPtr<AudioNode> input = mInputNodes[i].mInputNode;
+    mInputNodes.RemoveElementAt(i);
+    input->RemoveOutputParam(this);
+  }
+
+  if (mNodeStreamPort) {
+    mNodeStreamPort->Destroy();
+    mNodeStreamPort = nullptr;
+  }
+
+  if (mStream) {
+    mStream->Destroy();
+    mStream = nullptr;
+  }
+}
+
+MediaStream*
+AudioParam::Stream()
+{
+  if (mStream) {
+    return mStream;
+  }
+
+  AudioNodeEngine* engine = new AudioNodeEngine(nullptr);
+  RefPtr<AudioNodeStream> stream =
+    AudioNodeStream::Create(mNode->Context(), engine,
+                            AudioNodeStream::NO_STREAM_FLAGS,
+                            mNode->Context()->Graph());
+
+  // Force the input to have only one channel, and make it down-mix using
+  // the speaker rules if needed.
+  stream->SetChannelMixingParametersImpl(1, ChannelCountMode::Explicit, ChannelInterpretation::Speakers);
+  // Mark as an AudioParam helper stream
+  stream->SetAudioParamHelperStream();
+
+  mStream = stream.forget();
+
+  // Setup the AudioParam's stream as an input to the owner AudioNode's stream
+  AudioNodeStream* nodeStream = mNode->GetStream();
+  if (nodeStream) {
+    mNodeStreamPort =
+      nodeStream->AllocateInputPort(mStream, AudioNodeStream::AUDIO_TRACK);
+  }
+
+  // Send the stream to the timeline on the MSG side.
+  AudioTimelineEvent event(mStream);
+  SendEventToEngine(event);
+
+  return mStream;
+}
+
+static const char*
+ToString(AudioTimelineEvent::Type aType)
+{
+  switch (aType) {
+    case AudioTimelineEvent::SetValue:
+      return "SetValue";
+    case AudioTimelineEvent::SetValueAtTime:
+      return "SetValueAtTime";
+    case AudioTimelineEvent::LinearRamp:
+      return "LinearRamp";
+    case AudioTimelineEvent::ExponentialRamp:
+      return "ExponentialRamp";
+    case AudioTimelineEvent::SetTarget:
+      return "SetTarget";
+    case AudioTimelineEvent::SetValueCurve:
+      return "SetValueCurve";
+    case AudioTimelineEvent::Stream:
+      return "Stream";
+    case AudioTimelineEvent::Cancel:
+      return "Cancel";
+    default:
+      return "unknown AudioTimelineEvent";
+  }
+}
+
+void
+AudioParam::SendEventToEngine(const AudioTimelineEvent& aEvent)
+{
+  WEB_AUDIO_API_LOG("%f: %s for %u %s %s=%g time=%f %s=%g",
+                    GetParentObject()->CurrentTime(),
+                    mName, ParentNodeId(), ToString(aEvent.mType),
+                    aEvent.mType == AudioTimelineEvent::SetValueCurve ?
+                      "length" : "value",
+                    aEvent.mType == AudioTimelineEvent::SetValueCurve ?
+                      static_cast<double>(aEvent.mCurveLength) :
+                      static_cast<double>(aEvent.mValue),
+                    aEvent.Time<double>(),
+                    aEvent.mType == AudioTimelineEvent::SetValueCurve ?
+                      "duration" : "constant",
+                    aEvent.mType == AudioTimelineEvent::SetValueCurve ?
+                      aEvent.mDuration : aEvent.mTimeConstant);
+
+  AudioNodeStream* stream = mNode->GetStream();
+  if (stream) {
+    stream->SendTimelineEvent(mIndex, aEvent);
+  }
+}
+
+void
+AudioParam::CleanupOldEvents()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  double currentTime = mNode->Context()->CurrentTime();
+
+  CleanupEventsOlderThan(currentTime);
+}
+
+float
+AudioParamTimeline::AudioNodeInputValue(size_t aCounter) const
+{
+  MOZ_ASSERT(mStream);
+
+  // If we have a chunk produced by the AudioNode inputs to the AudioParam,
+  // get its value now.  We use aCounter to tell us which frame of the last
+  // AudioChunk to look at.
+  float audioNodeInputValue = 0.0f;
+  const AudioBlock& lastAudioNodeChunk =
+    static_cast<AudioNodeStream*>(mStream.get())->LastChunks()[0];
+  if (!lastAudioNodeChunk.IsNull()) {
+    MOZ_ASSERT(lastAudioNodeChunk.GetDuration() == WEBAUDIO_BLOCK_SIZE);
+    audioNodeInputValue =
+      static_cast<const float*>(lastAudioNodeChunk.mChannelData[0])[aCounter];
+    audioNodeInputValue *= lastAudioNodeChunk.mVolume;
+  }
+
+  return audioNodeInputValue;
+}
+
+} // namespace dom
+} // namespace mozilla
+