import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/media/platforms/wmf/WMFDecoderModule.h

@@ -0,0 +1,56 @@
+/* -*- 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(WMFPlatformDecoderModule_h_)
+#define WMFPlatformDecoderModule_h_
+
+#include "PlatformDecoderModule.h"
+
+namespace mozilla {
+
+class WMFDecoderModule : public PlatformDecoderModule {
+public:
+  WMFDecoderModule();
+  virtual ~WMFDecoderModule();
+
+  // Initializes the module, loads required dynamic libraries, etc.
+  nsresult Startup() override;
+
+  already_AddRefed<MediaDataDecoder>
+  CreateVideoDecoder(const CreateDecoderParams& aParams) override;
+
+  already_AddRefed<MediaDataDecoder>
+  CreateAudioDecoder(const CreateDecoderParams& aParams) override;
+
+  bool SupportsMimeType(const nsACString& aMimeType,
+                        DecoderDoctorDiagnostics* aDiagnostics) const override;
+  bool Supports(const TrackInfo& aTrackInfo,
+                DecoderDoctorDiagnostics* aDiagnostics) const override;
+
+  ConversionRequired
+  DecoderNeedsConversion(const TrackInfo& aConfig) const override;
+
+  // Called on main thread.
+  static void Init();
+
+  // Called from any thread, must call init first
+  static int GetNumDecoderThreads();
+
+  // Accessors that report whether we have the required MFTs available
+  // on the system to play various codecs. Windows Vista doesn't have the
+  // H.264/AAC decoders if the "Platform Update Supplement for Windows Vista"
+  // is not installed, and Window N and KN variants also require a "Media
+  // Feature Pack" to be installed. Windows XP doesn't have WMF.
+  static bool HasAAC();
+  static bool HasH264();
+
+private:
+  bool mWMFInitialized;
+};
+
+} // namespace mozilla
+
+#endif