1 files changed, 84 insertions, 0 deletions
diff --git a/dom/media/webaudio/AudioWorkletGlobalScope.h b/dom/media/webaudio/AudioWorkletGlobalScope.h
new file mode 100644
index 0000000000..faaa731fa6
--- /dev/null
+++ b/dom/media/webaudio/AudioWorkletGlobalScope.h
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef mozilla_dom_AudioWorkletGlobalScope_h
+#define mozilla_dom_AudioWorkletGlobalScope_h
+
+#include "mozilla/dom/AudioParamDescriptorMap.h"
+#include "mozilla/dom/FunctionBinding.h"
+#include "mozilla/dom/WorkletGlobalScope.h"
+#include "js/ForOfIterator.h"
+#include "nsRefPtrHashtable.h"
+
+namespace mozilla {
+
+class AudioWorkletImpl;
+
+namespace dom {
+
+class AudioWorkletProcessorConstructor;
+class MessagePort;
+class StructuredCloneHolder;
+class UniqueMessagePortId;
+
+class AudioWorkletGlobalScope final : public WorkletGlobalScope {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioWorkletGlobalScope,
+                                           WorkletGlobalScope);
+
+  explicit AudioWorkletGlobalScope(AudioWorkletImpl* aImpl);
+
+  bool WrapGlobalObject(JSContext* aCx,
+                        JS::MutableHandle<JSObject*> aReflector) override;
+
+  void RegisterProcessor(JSContext* aCx, const nsAString& aName,
+                         AudioWorkletProcessorConstructor& aProcessorCtor,
+                         ErrorResult& aRv);
+
+  AudioWorkletImpl* Impl() const;
+
+  uint64_t CurrentFrame() const;
+
+  double CurrentTime() const;
+
+  float SampleRate() const;
+
+  // If successful, returns true and sets aRetProcessor, which will be in the
+  // compartment for the realm of this global.  Returns false on failure.
+  MOZ_CAN_RUN_SCRIPT
+  bool ConstructProcessor(JSContext* aCx, const nsAString& aName,
+                          NotNull<StructuredCloneHolder*> aSerializedOptions,
+                          UniqueMessagePortId& aPortIdentifier,
+                          JS::MutableHandle<JSObject*> aRetProcessor);
+
+  // Returns null if not called during ConstructProcessor() or if the port has
+  // already been taken.
+  RefPtr<MessagePort> TakePortForProcessorCtor();
+
+ private:
+  ~AudioWorkletGlobalScope() = default;
+
+  // Returns an AudioParamDescriptorMap filled with AudioParamDescriptor
+  // objects, extracted from JS. Returns an empty map in case of error and set
+  // aRv accordingly.
+  AudioParamDescriptorMap DescriptorsFromJS(JSContext* aCx,
+                                            JS::ForOfIterator* aIter,
+                                            ErrorResult& aRv);
+
+  typedef nsRefPtrHashtable<nsStringHashKey, AudioWorkletProcessorConstructor>
+      NodeNameToProcessorDefinitionMap;
+  NodeNameToProcessorDefinitionMap mNameToProcessorMap;
+  // https://webaudio.github.io/web-audio-api/#pending-processor-construction-data-transferred-port
+  // This does not need to be traversed during cycle-collection because it is
+  // only set while this AudioWorkletGlobalScope is on the stack.
+  RefPtr<MessagePort> mPortForProcessor;
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_AudioWorkletGlobalScope_h