gecko-dev/dom/media/platforms/wmf/WMFDecoderModule.h

/* -*- 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:
  // 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;

  // 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:
  virtual ~WMFDecoderModule();

  bool mWMFInitialized = false;
};

}  // namespace mozilla

#endif