The Tor Browser: content/media/wmf/WMFDecoder.h@44a2da4a2ab2

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

     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 #if !defined(WMFDecoder_h_)

     7 #define WMFDecoder_h_

     9 #include "MediaDecoder.h"

    11 namespace mozilla {

    13 // Decoder that uses Windows Media Foundation to playback H.264/AAC in MP4

    14 // and M4A files, and MP3 files if the DirectShow backend is disabled.

    15 // Playback is strictly limited to only those codecs.

    16 class WMFDecoder : public MediaDecoder

    17 {

    18 public:

    20   virtual MediaDecoder* Clone() {

    21     if (!IsWMFEnabled()) {

    22       return nullptr;

    23     }

    24     return new WMFDecoder();

    25   }

    27   virtual MediaDecoderStateMachine* CreateStateMachine();

    29   // Loads the DLLs required by Windows Media Foundation. If this returns

    30   // failure, you can assume that WMF is not available on the user's system.

    31   static nsresult LoadDLLs();

    32   static void UnloadDLLs();

    34   // Returns true if the WMF backend is preffed on, and we're running on a

    35   // version of Windows which is likely to support WMF.

    36   static bool IsEnabled();

    38   // Returns true if MP3 decoding is enabled on this system. We block

    39   // MP3 playback on Windows 7 SP0, since it's crashy on that platform.

    40   static bool IsMP3Supported();

    42   // Returns the HTMLMediaElement.canPlayType() result for the mime type

    43   // and codecs parameter. aCodecs can be empty.

    44   static bool CanPlayType(const nsACString& aType,

    45                           const nsAString& aCodecs);

    47 };

    49 } // namespace mozilla

    51 #endif

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