The Tor Browser / file comparison
comparison: content/media/wmf/WMFUtils.h
content/media/wmf/WMFUtils.h
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:0366ce3ef057 |
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| 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 | |
| 7 #ifndef WMFUtils_h | |
| 8 #define WMFUtils_h | |
| 9 | |
| 10 #include "WMF.h" | |
| 11 #include "nsString.h" | |
| 12 #include "nsRect.h" | |
| 13 #include "VideoUtils.h" | |
| 14 | |
| 15 // Various utilities shared by WMF backend files. | |
| 16 | |
| 17 namespace mozilla { | |
| 18 | |
| 19 nsCString | |
| 20 GetGUIDName(const GUID& guid); | |
| 21 | |
| 22 // Returns true if the reader has a stream with the specified index. | |
| 23 // Index can be a specific index, or one of: | |
| 24 // MF_SOURCE_READER_FIRST_VIDEO_STREAM | |
| 25 // MF_SOURCE_READER_FIRST_AUDIO_STREAM | |
| 26 bool | |
| 27 SourceReaderHasStream(IMFSourceReader* aReader, const DWORD aIndex); | |
| 28 | |
| 29 // Auto manages the lifecycle of a PROPVARIANT. | |
| 30 class AutoPropVar { | |
| 31 public: | |
| 32 AutoPropVar() { | |
| 33 PropVariantInit(&mVar); | |
| 34 } | |
| 35 ~AutoPropVar() { | |
| 36 PropVariantClear(&mVar); | |
| 37 } | |
| 38 operator PROPVARIANT&() { | |
| 39 return mVar; | |
| 40 } | |
| 41 PROPVARIANT* operator->() { | |
| 42 return &mVar; | |
| 43 } | |
| 44 PROPVARIANT* operator&() { | |
| 45 return &mVar; | |
| 46 } | |
| 47 private: | |
| 48 PROPVARIANT mVar; | |
| 49 }; | |
| 50 | |
| 51 // Converts from microseconds to hundreds of nanoseconds. | |
| 52 // We use microseconds for our timestamps, whereas WMF uses | |
| 53 // hundreds of nanoseconds. | |
| 54 inline int64_t | |
| 55 UsecsToHNs(int64_t aUsecs) { | |
| 56 return aUsecs * 10; | |
| 57 } | |
| 58 | |
| 59 // Converts from hundreds of nanoseconds to microseconds. | |
| 60 // We use microseconds for our timestamps, whereas WMF uses | |
| 61 // hundreds of nanoseconds. | |
| 62 inline int64_t | |
| 63 HNsToUsecs(int64_t hNanoSecs) { | |
| 64 return hNanoSecs / 10; | |
| 65 } | |
| 66 | |
| 67 // Assigns aUnknown to *aInterface, and AddRef's it. | |
| 68 // Helper for MSCOM QueryInterface implementations. | |
| 69 HRESULT | |
| 70 DoGetInterface(IUnknown* aUnknown, void** aInterface); | |
| 71 | |
| 72 HRESULT | |
| 73 HNsToFrames(int64_t aHNs, uint32_t aRate, int64_t* aOutFrames); | |
| 74 | |
| 75 HRESULT | |
| 76 FramesToUsecs(int64_t aSamples, uint32_t aRate, int64_t* aOutUsecs); | |
| 77 | |
| 78 HRESULT | |
| 79 GetDefaultStride(IMFMediaType *aType, uint32_t* aOutStride); | |
| 80 | |
| 81 int32_t | |
| 82 MFOffsetToInt32(const MFOffset& aOffset); | |
| 83 | |
| 84 // Gets the sub-region of the video frame that should be displayed. | |
| 85 // See: http://msdn.microsoft.com/en-us/library/windows/desktop/bb530115(v=vs.85).aspx | |
| 86 HRESULT | |
| 87 GetPictureRegion(IMFMediaType* aMediaType, nsIntRect& aOutPictureRegion); | |
| 88 | |
| 89 // Returns the duration of a IMFSample in microseconds. | |
| 90 // Returns -1 on failure. | |
| 91 int64_t | |
| 92 GetSampleDuration(IMFSample* aSample); | |
| 93 | |
| 94 // Returns the presentation time of a IMFSample in microseconds. | |
| 95 // Returns -1 on failure. | |
| 96 int64_t | |
| 97 GetSampleTime(IMFSample* aSample); | |
| 98 | |
| 99 inline bool | |
| 100 IsFlagSet(DWORD flags, DWORD pattern) { | |
| 101 return (flags & pattern) == pattern; | |
| 102 } | |
| 103 | |
| 104 } // namespace mozilla | |
| 105 | |
| 106 #endif |
