mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/* -*- 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(WMFDecoder_h_)
|
|
#define WMFDecoder_h_
|
|
|
|
#include "MediaDecoder.h"
|
|
|
|
namespace mozilla {
|
|
|
|
// Decoder that uses Windows Media Foundation to playback H.264/AAC in MP4
|
|
// and M4A files, and MP3 files if the DirectShow backend is disabled.
|
|
// Playback is strictly limited to only those codecs.
|
|
class WMFDecoder : public MediaDecoder
|
|
{
|
|
public:
|
|
|
|
virtual MediaDecoder* Clone() {
|
|
if (!IsWMFEnabled()) {
|
|
return nullptr;
|
|
}
|
|
return new WMFDecoder();
|
|
}
|
|
|
|
virtual MediaDecoderStateMachine* CreateStateMachine();
|
|
|
|
// Loads the DLLs required by Windows Media Foundation. If this returns
|
|
// failure, you can assume that WMF is not available on the user's system.
|
|
static nsresult LoadDLLs();
|
|
static void UnloadDLLs();
|
|
|
|
// Returns true if the WMF backend is preffed on, and we're running on a
|
|
// version of Windows which is likely to support WMF.
|
|
static bool IsEnabled();
|
|
|
|
// Returns true if MP3 decoding is enabled on this system. We block
|
|
// MP3 playback on Windows 7 SP0, since it's crashy on that platform.
|
|
static bool IsMP3Supported();
|
|
|
|
// Returns the HTMLMediaElement.canPlayType() result for the mime type
|
|
// and codecs parameter. aCodecs can be empty.
|
|
static bool CanPlayType(const nsACString& aType,
|
|
const nsAString& aCodecs);
|
|
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|