content/media/wmf/WMFUtils.h@44a2da4a2ab2 (annotated)
content/media/wmf/WMFUtils.h
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef WMFUtils_h |
| michael@0 | 8 | #define WMFUtils_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "WMF.h" |
| michael@0 | 11 | #include "nsString.h" |
| michael@0 | 12 | #include "nsRect.h" |
| michael@0 | 13 | #include "VideoUtils.h" |
| michael@0 | 14 | |
| michael@0 | 15 | // Various utilities shared by WMF backend files. |
| michael@0 | 16 | |
| michael@0 | 17 | namespace mozilla { |
| michael@0 | 18 | |
| michael@0 | 19 | nsCString |
| michael@0 | 20 | GetGUIDName(const GUID& guid); |
| michael@0 | 21 | |
| michael@0 | 22 | // Returns true if the reader has a stream with the specified index. |
| michael@0 | 23 | // Index can be a specific index, or one of: |
| michael@0 | 24 | // MF_SOURCE_READER_FIRST_VIDEO_STREAM |
| michael@0 | 25 | // MF_SOURCE_READER_FIRST_AUDIO_STREAM |
| michael@0 | 26 | bool |
| michael@0 | 27 | SourceReaderHasStream(IMFSourceReader* aReader, const DWORD aIndex); |
| michael@0 | 28 | |
| michael@0 | 29 | // Auto manages the lifecycle of a PROPVARIANT. |
| michael@0 | 30 | class AutoPropVar { |
| michael@0 | 31 | public: |
| michael@0 | 32 | AutoPropVar() { |
| michael@0 | 33 | PropVariantInit(&mVar); |
| michael@0 | 34 | } |
| michael@0 | 35 | ~AutoPropVar() { |
| michael@0 | 36 | PropVariantClear(&mVar); |
| michael@0 | 37 | } |
| michael@0 | 38 | operator PROPVARIANT&() { |
| michael@0 | 39 | return mVar; |
| michael@0 | 40 | } |
| michael@0 | 41 | PROPVARIANT* operator->() { |
| michael@0 | 42 | return &mVar; |
| michael@0 | 43 | } |
| michael@0 | 44 | PROPVARIANT* operator&() { |
| michael@0 | 45 | return &mVar; |
| michael@0 | 46 | } |
| michael@0 | 47 | private: |
| michael@0 | 48 | PROPVARIANT mVar; |
| michael@0 | 49 | }; |
| michael@0 | 50 | |
| michael@0 | 51 | // Converts from microseconds to hundreds of nanoseconds. |
| michael@0 | 52 | // We use microseconds for our timestamps, whereas WMF uses |
| michael@0 | 53 | // hundreds of nanoseconds. |
| michael@0 | 54 | inline int64_t |
| michael@0 | 55 | UsecsToHNs(int64_t aUsecs) { |
| michael@0 | 56 | return aUsecs * 10; |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | // Converts from hundreds of nanoseconds to microseconds. |
| michael@0 | 60 | // We use microseconds for our timestamps, whereas WMF uses |
| michael@0 | 61 | // hundreds of nanoseconds. |
| michael@0 | 62 | inline int64_t |
| michael@0 | 63 | HNsToUsecs(int64_t hNanoSecs) { |
| michael@0 | 64 | return hNanoSecs / 10; |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | // Assigns aUnknown to *aInterface, and AddRef's it. |
| michael@0 | 68 | // Helper for MSCOM QueryInterface implementations. |
| michael@0 | 69 | HRESULT |
| michael@0 | 70 | DoGetInterface(IUnknown* aUnknown, void** aInterface); |
| michael@0 | 71 | |
| michael@0 | 72 | HRESULT |
| michael@0 | 73 | HNsToFrames(int64_t aHNs, uint32_t aRate, int64_t* aOutFrames); |
| michael@0 | 74 | |
| michael@0 | 75 | HRESULT |
| michael@0 | 76 | FramesToUsecs(int64_t aSamples, uint32_t aRate, int64_t* aOutUsecs); |
| michael@0 | 77 | |
| michael@0 | 78 | HRESULT |
| michael@0 | 79 | GetDefaultStride(IMFMediaType *aType, uint32_t* aOutStride); |
| michael@0 | 80 | |
| michael@0 | 81 | int32_t |
| michael@0 | 82 | MFOffsetToInt32(const MFOffset& aOffset); |
| michael@0 | 83 | |
| michael@0 | 84 | // Gets the sub-region of the video frame that should be displayed. |
| michael@0 | 85 | // See: http://msdn.microsoft.com/en-us/library/windows/desktop/bb530115(v=vs.85).aspx |
| michael@0 | 86 | HRESULT |
| michael@0 | 87 | GetPictureRegion(IMFMediaType* aMediaType, nsIntRect& aOutPictureRegion); |
| michael@0 | 88 | |
| michael@0 | 89 | // Returns the duration of a IMFSample in microseconds. |
| michael@0 | 90 | // Returns -1 on failure. |
| michael@0 | 91 | int64_t |
| michael@0 | 92 | GetSampleDuration(IMFSample* aSample); |
| michael@0 | 93 | |
| michael@0 | 94 | // Returns the presentation time of a IMFSample in microseconds. |
| michael@0 | 95 | // Returns -1 on failure. |
| michael@0 | 96 | int64_t |
| michael@0 | 97 | GetSampleTime(IMFSample* aSample); |
| michael@0 | 98 | |
| michael@0 | 99 | inline bool |
| michael@0 | 100 | IsFlagSet(DWORD flags, DWORD pattern) { |
| michael@0 | 101 | return (flags & pattern) == pattern; |
| michael@0 | 102 | } |
| michael@0 | 103 | |
| michael@0 | 104 | } // namespace mozilla |
| michael@0 | 105 | |
| michael@0 | 106 | #endif |
