1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/wmf/WMFDecoder.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,51 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +#if !defined(WMFDecoder_h_)
1.10 +#define WMFDecoder_h_
1.11 +
1.12 +#include "MediaDecoder.h"
1.13 +
1.14 +namespace mozilla {
1.15 +
1.16 +// Decoder that uses Windows Media Foundation to playback H.264/AAC in MP4
1.17 +// and M4A files, and MP3 files if the DirectShow backend is disabled.
1.18 +// Playback is strictly limited to only those codecs.
1.19 +class WMFDecoder : public MediaDecoder
1.20 +{
1.21 +public:
1.22 +
1.23 + virtual MediaDecoder* Clone() {
1.24 + if (!IsWMFEnabled()) {
1.25 + return nullptr;
1.26 + }
1.27 + return new WMFDecoder();
1.28 + }
1.29 +
1.30 + virtual MediaDecoderStateMachine* CreateStateMachine();
1.31 +
1.32 + // Loads the DLLs required by Windows Media Foundation. If this returns
1.33 + // failure, you can assume that WMF is not available on the user's system.
1.34 + static nsresult LoadDLLs();
1.35 + static void UnloadDLLs();
1.36 +
1.37 + // Returns true if the WMF backend is preffed on, and we're running on a
1.38 + // version of Windows which is likely to support WMF.
1.39 + static bool IsEnabled();
1.40 +
1.41 + // Returns true if MP3 decoding is enabled on this system. We block
1.42 + // MP3 playback on Windows 7 SP0, since it's crashy on that platform.
1.43 + static bool IsMP3Supported();
1.44 +
1.45 + // Returns the HTMLMediaElement.canPlayType() result for the mime type
1.46 + // and codecs parameter. aCodecs can be empty.
1.47 + static bool CanPlayType(const nsACString& aType,
1.48 + const nsAString& aCodecs);
1.49 +
1.50 +};
1.51 +
1.52 +} // namespace mozilla
1.53 +
1.54 +#endif
