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-rw-r--r--dom/media/platforms/wmf/MFCDMProxy.h71
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diff --git a/dom/media/platforms/wmf/MFCDMProxy.h b/dom/media/platforms/wmf/MFCDMProxy.h
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+/* 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 DOM_MEDIA_PLATFORM_WMF_MFCDMPROXY_H
+#define DOM_MEDIA_PLATFORM_WMF_MFCDMPROXY_H
+
+#include <map>
+#include <mfobjects.h>
+#include <unknwn.h>
+#include <windef.h>
+#include <wrl.h>
+
+#include "MFCDMExtra.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+
+/**
+ * MFCDMProxy wraps a IMFContentDecryptionModule and provides some high level
+ * helper methods in order to allow caller to interact with the wrapped CDM.
+ */
+class MFCDMProxy {
+ NS_INLINE_DECL_REFCOUNTING(MFCDMProxy);
+
+ explicit MFCDMProxy(IMFContentDecryptionModule* aCDM) : mCDM(aCDM) {}
+
+ public:
+ // Return a IMediaProtectionPMPServer from the existing CDM.
+ HRESULT GetPMPServer(REFIID aRiid, LPVOID* aPMPServerOut);
+
+ // Return a IMFInputTrustAuthority for given stream id, the same stream ID
+ // always maps to the same IMFInputTrustAuthority. In addition,
+ // `aContentInitData` is optional initialization data as in
+ // https://www.w3.org/TR/encrypted-media/#initialization-data
+ HRESULT GetInputTrustAuthority(uint32_t aStreamId,
+ const uint8_t* aContentInitData,
+ uint32_t aContentInitDataSize, REFIID aRiid,
+ IUnknown** aInputTrustAuthorityOut);
+
+ // Set IMFContentEnabler to the existing CDM, `aRequest` should be a inherited
+ // class of `IMFContentEnabler`.
+ HRESULT SetContentEnabler(IUnknown* aRequest, IMFAsyncResult* aResult);
+
+ // Notify the CDM on DRM_E_TEE_INVALID_HWDRM_STATE (0x8004cd12), which happens
+ // in cases like OS Sleep. In this case, the CDM should close all sessions
+ // because they are in bad state.
+ void OnHardwareContextReset();
+
+ // TODO : set last key id in order to let CDM use the key IDs information to
+ // perform some optimization.
+
+ private:
+ ~MFCDMProxy() = default;
+
+ Microsoft::WRL::ComPtr<IMFContentDecryptionModule> mCDM;
+
+ // The same ITA is always mapping to the same stream Id.
+ std::map<uint32_t /* stream Id */,
+ Microsoft::WRL::ComPtr<IMFInputTrustAuthority>>
+ mInputTrustAuthorities;
+
+ Microsoft::WRL::ComPtr<IMFTrustedInput> mTrustedInput;
+
+ // TODO : need some events? (Eg. significant playback, error, hardware context
+ // reset)
+};
+
+} // namespace mozilla
+
+#endif // DOM_MEDIA_PLATFORM_WMF_MFCDMPROXY_H