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-rw-r--r--dom/media/webaudio/AudioParamDescriptorMap.h22
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diff --git a/dom/media/webaudio/AudioParamDescriptorMap.h b/dom/media/webaudio/AudioParamDescriptorMap.h
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+++ b/dom/media/webaudio/AudioParamDescriptorMap.h
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+/* -*- 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 https://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_AudioParamDescriptor_h
+#define mozilla_dom_AudioParamDescriptor_h
+
+#include "mozilla/dom/AudioParamDescriptorBinding.h"
+#include "nsTArray.h"
+
+namespace mozilla::dom {
+
+// Note: we call this "map" to match the spec, but we store audio param
+// descriptors in an array, because we need ordered access, and don't need the
+// map functionalities.
+typedef nsTArray<AudioParamDescriptor> AudioParamDescriptorMap;
+
+} // namespace mozilla::dom
+
+#endif // mozilla_dom_AudioParamDescriptor_h