/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project .
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* 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/.
*
* This file incorporates work covered by the following license notice :
*
* Licensed to the Apache Software Foundation ( ASF ) under one or more
* contributor license agreements . See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership . The ASF licenses this file to you under the Apache
* License , Version 2 . 0 ( the " License " ) ; you may not use this file
* except in compliance with the License . You may obtain a copy of
* the License at http : //www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <memory>
#include <prewin.h>
#include <postwin.h>
#include <objbase.h>
#include <strmif.h>
#include <Amvideo.h>
#include "interface.hxx"
#include <uuids.h>
#include "framegrabber.hxx"
#include "player.hxx"
#include <cppuhelper/supportsservice.hxx>
#include <osl/file.hxx>
#include <tools/stream.hxx>
#include <vcl/graph.hxx>
#include <vcl/dibtools.hxx>
#include <o3tl/char16_t2wchar_t.hxx>
#include <systools/win32/oleauto.hxx>
constexpr OUStringLiteral AVMEDIA_WIN_FRAMEGRABBER_IMPLEMENTATIONNAME = u"com.sun.star.comp.avmedia.FrameGrabber_DirectX" ;
constexpr OUString AVMEDIA_WIN_FRAMEGRABBER_SERVICENAME = u"com.sun.star.media.FrameGrabber_DirectX" _ustr;
using namespace ::com::sun::star;
namespace avmedia::win {
FrameGrabber::FrameGrabber()
: sal::systools::CoInitializeGuard(COINIT_APARTMENTTHREADED, false ,
sal::systools::CoInitializeGuard::WhenFailed::NoThrow)
{
}
FrameGrabber::~FrameGrabber() = default ;
namespace {
sal::systools::COMReference<IMediaDet> implCreateMediaDet( const OUString& rURL )
{
sal::systools::COMReference<IMediaDet> pDet;
if ( SUCCEEDED(pDet.CoCreateInstance(CLSID_MediaDet, nullptr, CLSCTX_INPROC_SERVER)) )
{
OUString aLocalStr;
if ( osl::FileBase::getSystemPathFromFileURL( rURL, aLocalStr )
== osl::FileBase::E_None )
{
if ( !SUCCEEDED( pDet->put_Filename(sal::systools::BStr(aLocalStr)) ) )
pDet.clear();
}
}
return pDet;
}
}
bool FrameGrabber::create( const OUString& rURL )
{
// just check if a MediaDet interface can be created with the given URL
if (implCreateMediaDet(rURL))
maURL = rURL;
else
maURL.clear();
return !maURL.isEmpty();
}
uno::Reference< graphic::XGraphic > SAL_CALL FrameGrabber::grabFrame( double fMediaTime )
{
uno::Reference< graphic::XGraphic > xRet;
if (sal::systools::COMReference<IMediaDet> pDet = implCreateMediaDet(maURL))
{
double fLength;
long nStreamCount;
bool bFound = false ;
if ( SUCCEEDED( pDet->get_OutputStreams( &nStreamCount ) ) )
{
for ( long n = 0 ; ( n < nStreamCount ) && !bFound; ++n )
{
GUID aMajorType;
if ( SUCCEEDED( pDet->put_CurrentStream( n ) ) &&
SUCCEEDED( pDet->get_StreamType( &aMajorType ) ) &&
( aMajorType == MEDIATYPE_Video ) )
{
bFound = true ;
}
}
}
if ( bFound &&
( S_OK == pDet->get_StreamLength( &fLength ) ) &&
( fLength > 0 .0 ) && ( fMediaTime >= 0 .0 ) && ( fMediaTime <= fLength ) )
{
AM_MEDIA_TYPE aMediaType;
LONG nWidth = 0 , nHeight = 0 ;
long nSize = 0 ;
if ( SUCCEEDED( pDet->get_StreamMediaType( &aMediaType ) ) )
{
if ( ( aMediaType.formattype == FORMAT_VideoInfo ) &&
( aMediaType.cbFormat >= sizeof ( VIDEOINFOHEADER ) ) )
{
VIDEOINFOHEADER* pVih = reinterpret_cast < VIDEOINFOHEADER* >( aMediaType.pbFormat );
nWidth = pVih->bmiHeader.biWidth;
nHeight = pVih->bmiHeader.biHeight;
if ( nHeight < 0 )
nHeight *= -1 ;
}
if ( aMediaType.cbFormat != 0 )
{
::CoTaskMemFree( aMediaType.pbFormat );
aMediaType.cbFormat = 0 ;
aMediaType.pbFormat = nullptr;
}
if ( aMediaType.pUnk != nullptr )
{
aMediaType.pUnk->Release();
aMediaType.pUnk = nullptr;
}
}
if ( ( nWidth > 0 ) && ( nHeight > 0 ) &&
SUCCEEDED( pDet->GetBitmapBits( 0 , &nSize, nullptr, nWidth, nHeight ) ) &&
( nSize > 0 ) )
{
auto pBuffer = std::make_unique<char []>(nSize);
try
{
if ( SUCCEEDED( pDet->GetBitmapBits( fMediaTime, nullptr, pBuffer.get(), nWidth, nHeight ) ) )
{
SvMemoryStream aMemStm( pBuffer.get(), nSize, StreamMode::READ | StreamMode::WRITE );
Bitmap aBmp;
if ( ReadDIB(aBmp, aMemStm, false ) && !aBmp.IsEmpty() )
{
BitmapEx aBitmapEx(aBmp);
Graphic aGraphic(aBitmapEx);
xRet = aGraphic.GetXGraphic();
}
}
}
catch ( ... )
{
}
}
}
}
return xRet;
}
OUString SAL_CALL FrameGrabber::getImplementationName( )
{
return AVMEDIA_WIN_FRAMEGRABBER_IMPLEMENTATIONNAME;
}
sal_Bool SAL_CALL FrameGrabber::supportsService( const OUString& ServiceName )
{
return cppu::supportsService(this , ServiceName);
}
uno::Sequence< OUString > SAL_CALL FrameGrabber::getSupportedServiceNames( )
{
return { AVMEDIA_WIN_FRAMEGRABBER_SERVICENAME };
}
} // namespace avmedia::win
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
Messung V0.5 in Prozent C=97 H=98 G=97
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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