1 files changed, 57 insertions, 0 deletions
diff --git a/dom/media/platforms/agnostic/gmp/GMPDecoderModule.h b/dom/media/platforms/agnostic/gmp/GMPDecoderModule.h
new file mode 100644
index 0000000000..433710297a
--- /dev/null
+++ b/dom/media/platforms/agnostic/gmp/GMPDecoderModule.h
@@ -0,0 +1,57 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/. */
+
+#if !defined(GMPDecoderModule_h_)
+#  define GMPDecoderModule_h_
+
+#  include "PlatformDecoderModule.h"
+#  include "mozilla/Maybe.h"
+
+// The special NodeId we use when doing unencrypted decoding using the GMP's
+// decoder. This ensures that each GMP MediaDataDecoder we create doesn't
+// require spinning up a new process, but instead we run all instances of
+// GMP decoders in the one process, to reduce overhead.
+//
+// Note: GMP storage is isolated by NodeId, and non persistent for this
+// special NodeId, and the only way a GMP can communicate with the outside
+// world is through the EME GMP APIs, and we never run EME with this NodeID
+// (because NodeIds are random strings which can't contain the '-' character),
+// so there's no way a malicious GMP can harvest, store, and then report any
+// privacy sensitive data about what users are watching.
+#  define SHARED_GMP_DECODING_NODE_ID "gmp-shared-decoding"_ns
+
+namespace mozilla {
+
+class GMPDecoderModule : public PlatformDecoderModule {
+  template <typename T, typename... Args>
+  friend already_AddRefed<T> MakeAndAddRef(Args&&...);
+
+ public:
+  static already_AddRefed<PlatformDecoderModule> Create();
+
+  // Decode thread.
+  already_AddRefed<MediaDataDecoder> CreateVideoDecoder(
+      const CreateDecoderParams& aParams) override;
+
+  // Decode thread.
+  already_AddRefed<MediaDataDecoder> CreateAudioDecoder(
+      const CreateDecoderParams& aParams) override;
+
+  media::DecodeSupportSet SupportsMimeType(
+      const nsACString& aMimeType,
+      DecoderDoctorDiagnostics* aDiagnostics) const override;
+
+  static media::DecodeSupportSet SupportsMimeType(const nsACString& aMimeType,
+                                                  const Maybe<nsCString>& aGMP);
+
+ private:
+  GMPDecoderModule() = default;
+  virtual ~GMPDecoderModule() = default;
+};
+
+}  // namespace mozilla
+
+#endif  // GMPDecoderModule_h_