1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #if !defined(GMPDecoderModule_h_) 8 #define GMPDecoderModule_h_ 9 10 #include "PlatformDecoderModule.h" 11 #include "mozilla/Maybe.h" 12 13 // The special NodeId we use when doing unencrypted decoding using the GMP's 14 // decoder. This ensures that each GMP MediaDataDecoder we create doesn't 15 // require spinning up a new process, but instead we run all instances of 16 // GMP decoders in the one process, to reduce overhead. 17 // 18 // Note: GMP storage is isolated by NodeId, and non persistent for this 19 // special NodeId, and the only way a GMP can communicate with the outside 20 // world is through the EME GMP APIs, and we never run EME with this NodeID 21 // (because NodeIds are random strings which can't contain the '-' character), 22 // so there's no way a malicious GMP can harvest, store, and then report any 23 // privacy sensitive data about what users are watching. 24 #define SHARED_GMP_DECODING_NODE_ID NS_LITERAL_CSTRING("gmp-shared-decoding") 25 26 namespace mozilla { 27 28 class GMPDecoderModule : public PlatformDecoderModule { 29 public: 30 GMPDecoderModule(); 31 32 // Decode thread. 33 already_AddRefed<MediaDataDecoder> CreateVideoDecoder( 34 const CreateDecoderParams& aParams) override; 35 36 // Decode thread. 37 already_AddRefed<MediaDataDecoder> CreateAudioDecoder( 38 const CreateDecoderParams& aParams) override; 39 40 bool SupportsMimeType(const nsACString& aMimeType, 41 DecoderDoctorDiagnostics* aDiagnostics) const override; 42 43 static bool SupportsMimeType(const nsACString& aMimeType, 44 const Maybe<nsCString>& aGMP); 45 46 private: 47 virtual ~GMPDecoderModule(); 48 }; 49 50 } // namespace mozilla 51 52 #endif // GMPDecoderModule_h_ 53