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https://gitlab.winehq.org/wine/wine-gecko.git
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68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WMF.h"
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#include "nsString.h"
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// Various utilities shared by WMF backend files.
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namespace mozilla {
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nsCString
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GetGUIDName(const GUID& guid);
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// Returns true if the reader has a stream with the specified index.
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// Index can be a specific index, or one of:
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// MF_SOURCE_READER_FIRST_VIDEO_STREAM
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// MF_SOURCE_READER_FIRST_AUDIO_STREAM
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bool
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SourceReaderHasStream(IMFSourceReader* aReader, const DWORD aIndex);
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// Auto manages the lifecycle of a PROPVARIANT.
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class AutoPropVar {
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public:
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AutoPropVar() {
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PropVariantInit(&mVar);
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}
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~AutoPropVar() {
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PropVariantClear(&mVar);
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}
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operator PROPVARIANT&() {
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return mVar;
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}
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PROPVARIANT* operator->() {
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return &mVar;
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}
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PROPVARIANT* operator&() {
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return &mVar;
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}
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private:
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PROPVARIANT mVar;
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};
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// Converts from microseconds to hundreds of nanoseconds.
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// We use microseconds for our timestamps, whereas WMF uses
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// hundreds of nanoseconds.
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inline int64_t
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UsecsToHNs(int64_t aUsecs) {
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return aUsecs * 10;
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}
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// Converts from hundreds of nanoseconds to microseconds.
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// We use microseconds for our timestamps, whereas WMF uses
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// hundreds of nanoseconds.
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inline int64_t
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HNsToUsecs(int64_t hNanoSecs) {
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return hNanoSecs / 10;
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}
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// Assigns aUnknown to *aInterface, and AddRef's it.
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// Helper for MSCOM QueryInterface implementations.
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HRESULT
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DoGetInterface(IUnknown* aUnknown, void** aInterface);
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} // namespace mozilla
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