The Tor Browser / file comparison
comparison: content/media/wmf/WMFDecoder.h
content/media/wmf/WMFDecoder.h
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:1c84839a1897 |
|---|---|
| 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_ | |
| 8 | |
| 9 #include "MediaDecoder.h" | |
| 10 | |
| 11 namespace mozilla { | |
| 12 | |
| 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: | |
| 19 | |
| 20 virtual MediaDecoder* Clone() { | |
| 21 if (!IsWMFEnabled()) { | |
| 22 return nullptr; | |
| 23 } | |
| 24 return new WMFDecoder(); | |
| 25 } | |
| 26 | |
| 27 virtual MediaDecoderStateMachine* CreateStateMachine(); | |
| 28 | |
| 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(); | |
| 33 | |
| 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(); | |
| 37 | |
| 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(); | |
| 41 | |
| 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); | |
| 46 | |
| 47 }; | |
| 48 | |
| 49 } // namespace mozilla | |
| 50 | |
| 51 #endif |
