1 files changed, 99 insertions, 0 deletions
diff --git a/dom/media/eme/EMEUtils.h b/dom/media/eme/EMEUtils.h
new file mode 100644
index 0000000000..f4de8b383d
--- /dev/null
+++ b/dom/media/eme/EMEUtils.h
@@ -0,0 +1,99 @@
+/* -*- 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 EME_LOG_H_
+#define EME_LOG_H_
+
+#include "mozilla/Logging.h"
+#include "nsString.h"
+#include "nsTArray.h"
+
+namespace mozilla {
+
+namespace dom {
+class ArrayBufferViewOrArrayBuffer;
+}
+
+#ifndef EME_LOG
+LogModule* GetEMELog();
+#  define EME_LOG(...) \
+    MOZ_LOG(GetEMELog(), mozilla::LogLevel::Debug, (__VA_ARGS__))
+#  define EME_LOG_ENABLED() MOZ_LOG_TEST(GetEMELog(), mozilla::LogLevel::Debug)
+#endif
+
+#ifndef EME_VERBOSE_LOG
+LogModule* GetEMEVerboseLog();
+#  define EME_VERBOSE_LOG(...) \
+    MOZ_LOG(GetEMEVerboseLog(), mozilla::LogLevel::Debug, (__VA_ARGS__))
+#else
+#  ifndef EME_LOG
+#    define EME_LOG(...)
+#  endif
+
+#  ifndef EME_VERBOSE_LOG
+#    define EME_VERBOSE_LOG(...)
+#  endif
+#endif
+
+// Helper function to extract a copy of data coming in from JS in an
+// (ArrayBuffer or ArrayBufferView) IDL typed function argument.
+//
+// Only call this on a properly initialized ArrayBufferViewOrArrayBuffer.
+void CopyArrayBufferViewOrArrayBufferData(
+    const dom::ArrayBufferViewOrArrayBuffer& aBufferOrView,
+    nsTArray<uint8_t>& aOutData);
+
+struct ArrayData {
+  explicit ArrayData(const uint8_t* aData, size_t aLength)
+      : mData(aData), mLength(aLength) {}
+  const uint8_t* mData;
+  const size_t mLength;
+  bool IsValid() const { return mData != nullptr && mLength != 0; }
+  bool operator==(const nsTArray<uint8_t>& aOther) const {
+    return mLength == aOther.Length() &&
+           memcmp(mData, aOther.Elements(), mLength) == 0;
+  }
+};
+
+// Helper function to extract data coming in from JS in an
+// (ArrayBuffer or ArrayBufferView) IDL typed function argument.
+//
+// Be *very* careful with this!
+//
+// Only use returned ArrayData inside the lifetime of the
+// ArrayBufferViewOrArrayBuffer; the ArrayData struct does not contain
+// a copy of the data!
+//
+// And do *not* call out to anything that could call into JavaScript,
+// while the ArrayData is live, as then all bets about the data not changing
+// are off! No calls into JS, no calls into JS-implemented WebIDL or XPIDL,
+// nothing. Beware!
+//
+// Only call this on a properly initialized ArrayBufferViewOrArrayBuffer.
+ArrayData GetArrayBufferViewOrArrayBufferData(
+    const dom::ArrayBufferViewOrArrayBuffer& aBufferOrView);
+
+nsString KeySystemToGMPName(const nsAString& aKeySystem);
+
+bool IsClearkeyKeySystem(const nsAString& aKeySystem);
+
+bool IsWidevineKeySystem(const nsAString& aKeySystem);
+
+// Note: Primetime is now unsupported, but we leave it in the enum so
+// that the telemetry enum values are not changed; doing so would break
+// existing telemetry probes.
+enum CDMType {
+  eClearKey = 0,
+  ePrimetime = 1,  // Note: Unsupported.
+  eWidevine = 2,
+  eUnknown = 3
+};
+
+CDMType ToCDMTypeTelemetryEnum(const nsString& aKeySystem);
+
+}  // namespace mozilla
+
+#endif  // EME_LOG_H_