1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/wmf/WMFUtils.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,106 @@
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 +
1.10 +#ifndef WMFUtils_h
1.11 +#define WMFUtils_h
1.12 +
1.13 +#include "WMF.h"
1.14 +#include "nsString.h"
1.15 +#include "nsRect.h"
1.16 +#include "VideoUtils.h"
1.17 +
1.18 +// Various utilities shared by WMF backend files.
1.19 +
1.20 +namespace mozilla {
1.21 +
1.22 +nsCString
1.23 +GetGUIDName(const GUID& guid);
1.24 +
1.25 +// Returns true if the reader has a stream with the specified index.
1.26 +// Index can be a specific index, or one of:
1.27 +// MF_SOURCE_READER_FIRST_VIDEO_STREAM
1.28 +// MF_SOURCE_READER_FIRST_AUDIO_STREAM
1.29 +bool
1.30 +SourceReaderHasStream(IMFSourceReader* aReader, const DWORD aIndex);
1.31 +
1.32 +// Auto manages the lifecycle of a PROPVARIANT.
1.33 +class AutoPropVar {
1.34 +public:
1.35 + AutoPropVar() {
1.36 + PropVariantInit(&mVar);
1.37 + }
1.38 + ~AutoPropVar() {
1.39 + PropVariantClear(&mVar);
1.40 + }
1.41 + operator PROPVARIANT&() {
1.42 + return mVar;
1.43 + }
1.44 + PROPVARIANT* operator->() {
1.45 + return &mVar;
1.46 + }
1.47 + PROPVARIANT* operator&() {
1.48 + return &mVar;
1.49 + }
1.50 +private:
1.51 + PROPVARIANT mVar;
1.52 +};
1.53 +
1.54 +// Converts from microseconds to hundreds of nanoseconds.
1.55 +// We use microseconds for our timestamps, whereas WMF uses
1.56 +// hundreds of nanoseconds.
1.57 +inline int64_t
1.58 +UsecsToHNs(int64_t aUsecs) {
1.59 + return aUsecs * 10;
1.60 +}
1.61 +
1.62 +// Converts from hundreds of nanoseconds to microseconds.
1.63 +// We use microseconds for our timestamps, whereas WMF uses
1.64 +// hundreds of nanoseconds.
1.65 +inline int64_t
1.66 +HNsToUsecs(int64_t hNanoSecs) {
1.67 + return hNanoSecs / 10;
1.68 +}
1.69 +
1.70 +// Assigns aUnknown to *aInterface, and AddRef's it.
1.71 +// Helper for MSCOM QueryInterface implementations.
1.72 +HRESULT
1.73 +DoGetInterface(IUnknown* aUnknown, void** aInterface);
1.74 +
1.75 +HRESULT
1.76 +HNsToFrames(int64_t aHNs, uint32_t aRate, int64_t* aOutFrames);
1.77 +
1.78 +HRESULT
1.79 +FramesToUsecs(int64_t aSamples, uint32_t aRate, int64_t* aOutUsecs);
1.80 +
1.81 +HRESULT
1.82 +GetDefaultStride(IMFMediaType *aType, uint32_t* aOutStride);
1.83 +
1.84 +int32_t
1.85 +MFOffsetToInt32(const MFOffset& aOffset);
1.86 +
1.87 +// Gets the sub-region of the video frame that should be displayed.
1.88 +// See: http://msdn.microsoft.com/en-us/library/windows/desktop/bb530115(v=vs.85).aspx
1.89 +HRESULT
1.90 +GetPictureRegion(IMFMediaType* aMediaType, nsIntRect& aOutPictureRegion);
1.91 +
1.92 +// Returns the duration of a IMFSample in microseconds.
1.93 +// Returns -1 on failure.
1.94 +int64_t
1.95 +GetSampleDuration(IMFSample* aSample);
1.96 +
1.97 +// Returns the presentation time of a IMFSample in microseconds.
1.98 +// Returns -1 on failure.
1.99 +int64_t
1.100 +GetSampleTime(IMFSample* aSample);
1.101 +
1.102 +inline bool
1.103 +IsFlagSet(DWORD flags, DWORD pattern) {
1.104 + return (flags & pattern) == pattern;
1.105 +}
1.106 +
1.107 +} // namespace mozilla
1.108 +
1.109 +#endif
