1 files changed, 82 insertions, 0 deletions
diff --git a/media/wmf-clearkey/WMFClearKeyCDMFactory.cpp b/media/wmf-clearkey/WMFClearKeyCDMFactory.cpp
new file mode 100644
index 0000000000..6ec253850d
--- /dev/null
+++ b/media/wmf-clearkey/WMFClearKeyCDMFactory.cpp
@@ -0,0 +1,82 @@
+/* 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 "WMFClearKeyCDMFactory.h"
+
+#include <string>
+
+#include <Mferror.h>
+
+#include "WMFClearKeyCDMAccess.h"
+#include "WMFClearKeyUtils.h"
+
+namespace mozilla {
+
+using Microsoft::WRL::MakeAndInitialize;
+
+ActivatableClass(WMFClearKeyCDMFactory);
+
+bool isRequiringHDCP22OrAbove(LPCWSTR aType) {
+  if (aType == nullptr || *aType == L'\0') {
+    return false;
+  }
+
+  // The HDCP value follows the feature value in
+  // https://docs.microsoft.com/en-us/uwp/api/windows.media.protection.protectioncapabilities.istypesupported?view=winrt-19041
+  // - 1 (on without HDCP 2.2 Type 1 restriction)
+  // - 2 (on with HDCP 2.2 Type 1 restriction)
+  std::wstring wstr(aType);
+  std::string hdcpStr(wstr.begin(), wstr.end());
+  return wstr.find(L"hdcp=2") != std::string::npos;
+}
+
+STDMETHODIMP_(BOOL)
+WMFClearKeyCDMFactory::IsTypeSupported(_In_ LPCWSTR aKeySystem,
+                                       _In_opt_ LPCWSTR aContentType) {
+  // For testing, return support for most of cases. Only returns false for some
+  // special cases.
+
+  bool needHDCP22OrAbove = isRequiringHDCP22OrAbove(aContentType);
+  ENTRY_LOG_ARGS("Need-HDCP2.2+=%d", needHDCP22OrAbove);
+
+  // As the API design of the Media Foundation, we can only know whether the
+  // requester is asking for HDCP 2.2+ or not, we can't know the exact HDCP
+  // version which is used in getStatusPolicy web api. Therefore, we pretend
+  // ourselves only having HDCP 2.1 compliant.
+  if (needHDCP22OrAbove) {
+    return false;
+  }
+  return true;
+}
+
+STDMETHODIMP
+WMFClearKeyCDMFactory::CreateContentDecryptionModuleAccess(
+    LPCWSTR aKeySystem, IPropertyStore** aConfigurations,
+    DWORD aNumConfigurations, IMFContentDecryptionModuleAccess** aCdmAccess) {
+  ENTRY_LOG();
+  if (aKeySystem == nullptr || aKeySystem[0] == L'\0') {
+    ENTRY_LOG_ARGS("Key system is null or empty");
+    return MF_TYPE_ERR;
+  }
+
+  if (aNumConfigurations == 0) {
+    ENTRY_LOG_ARGS("No available configration");
+    return MF_TYPE_ERR;
+  }
+
+  if (!IsTypeSupported(aKeySystem, nullptr)) {
+    ENTRY_LOG_ARGS("Not supported type");
+    return MF_NOT_SUPPORTED_ERR;
+  }
+
+  RETURN_IF_FAILED((
+      MakeAndInitialize<WMFClearKeyCDMAccess, IMFContentDecryptionModuleAccess>(
+          aCdmAccess)));
+  ENTRY_LOG_ARGS("Created CDM access!");
+  return S_OK;
+}
+
+#undef LOG
+
+}  // namespace mozilla