1 files changed, 119 insertions, 0 deletions
diff --git a/dom/media/eme/EMEUtils.cpp b/dom/media/eme/EMEUtils.cpp
new file mode 100644
index 0000000000..0f1630589e
--- /dev/null
+++ b/dom/media/eme/EMEUtils.cpp
@@ -0,0 +1,119 @@
+/* -*- 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/. */
+
+#include "mozilla/EMEUtils.h"
+
+#include "jsfriendapi.h"
+#include "mozilla/StaticPrefs_media.h"
+#include "mozilla/dom/KeySystemNames.h"
+#include "mozilla/dom/UnionTypes.h"
+
+namespace mozilla {
+
+LogModule* GetEMELog() {
+  static LazyLogModule log("EME");
+  return log;
+}
+
+LogModule* GetEMEVerboseLog() {
+  static LazyLogModule log("EMEV");
+  return log;
+}
+
+ArrayData GetArrayBufferViewOrArrayBufferData(
+    const dom::ArrayBufferViewOrArrayBuffer& aBufferOrView) {
+  MOZ_ASSERT(aBufferOrView.IsArrayBuffer() ||
+             aBufferOrView.IsArrayBufferView());
+  JS::AutoCheckCannotGC nogc;
+  if (aBufferOrView.IsArrayBuffer()) {
+    const dom::ArrayBuffer& buffer = aBufferOrView.GetAsArrayBuffer();
+    buffer.ComputeState();
+    return ArrayData(buffer.Data(), buffer.Length());
+  } else if (aBufferOrView.IsArrayBufferView()) {
+    const dom::ArrayBufferView& bufferview =
+        aBufferOrView.GetAsArrayBufferView();
+    bufferview.ComputeState();
+    return ArrayData(bufferview.Data(), bufferview.Length());
+  }
+  return ArrayData(nullptr, 0);
+}
+
+void CopyArrayBufferViewOrArrayBufferData(
+    const dom::ArrayBufferViewOrArrayBuffer& aBufferOrView,
+    nsTArray<uint8_t>& aOutData) {
+  JS::AutoCheckCannotGC nogc;
+  ArrayData data = GetArrayBufferViewOrArrayBufferData(aBufferOrView);
+  aOutData.Clear();
+  if (!data.IsValid()) {
+    return;
+  }
+  aOutData.AppendElements(data.mData, data.mLength);
+}
+
+bool IsClearkeyKeySystem(const nsAString& aKeySystem) {
+  if (StaticPrefs::media_clearkey_test_key_systems_enabled()) {
+    return aKeySystem.EqualsLiteral(kClearKeyKeySystemName) ||
+           aKeySystem.EqualsLiteral(kClearKeyWithProtectionQueryKeySystemName);
+  }
+  return aKeySystem.EqualsLiteral(kClearKeyKeySystemName);
+}
+
+bool IsWidevineKeySystem(const nsAString& aKeySystem) {
+  return aKeySystem.EqualsLiteral(kWidevineKeySystemName);
+}
+
+#ifdef MOZ_WMF_CDM
+bool IsPlayReadyKeySystemAndSupported(const nsAString& aKeySystem) {
+  if (!StaticPrefs::media_eme_playready_enabled()) {
+    return false;
+  }
+  // 1=enabled encrypted and clear, 2=enabled encrytped.
+  if (StaticPrefs::media_wmf_media_engine_enabled() != 1 &&
+      StaticPrefs::media_wmf_media_engine_enabled() != 2) {
+    return false;
+  }
+  return aKeySystem.EqualsLiteral(kPlayReadyKeySystemName) ||
+         aKeySystem.EqualsLiteral(kPlayReadyKeySystemHardware);
+}
+#endif
+
+nsString KeySystemToProxyName(const nsAString& aKeySystem) {
+  if (IsClearkeyKeySystem(aKeySystem)) {
+    return u"gmp-clearkey"_ns;
+  }
+  if (IsWidevineKeySystem(aKeySystem)) {
+    return u"gmp-widevinecdm"_ns;
+  }
+#ifdef MOZ_WMF_CDM
+  if (IsPlayReadyKeySystemAndSupported(aKeySystem)) {
+    return u"mfcdm-playready"_ns;
+  }
+#endif
+  MOZ_ASSERT_UNREACHABLE("Not supported key system!");
+  return u""_ns;
+}
+
+#define ENUM_TO_STR(enumVal) \
+  case enumVal:              \
+    return #enumVal
+
+const char* ToMediaKeyStatusStr(dom::MediaKeyStatus aStatus) {
+  switch (aStatus) {
+    ENUM_TO_STR(dom::MediaKeyStatus::Usable);
+    ENUM_TO_STR(dom::MediaKeyStatus::Expired);
+    ENUM_TO_STR(dom::MediaKeyStatus::Released);
+    ENUM_TO_STR(dom::MediaKeyStatus::Output_restricted);
+    ENUM_TO_STR(dom::MediaKeyStatus::Output_downscaled);
+    ENUM_TO_STR(dom::MediaKeyStatus::Status_pending);
+    ENUM_TO_STR(dom::MediaKeyStatus::Internal_error);
+    default:
+      return "Undefined MediaKeyStatus!";
+  }
+}
+
+#undef ENUM_TO_STR
+
+}  // namespace mozilla