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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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>
constexpr OUStringLiteral AVMEDIA_WIN_FRAMEGRABBER_IMPLEMENTATIONNAME = u"com.sun.star.comp.avmedia.FrameGrabber_DirectX";
constexpr OUStringLiteral AVMEDIA_WIN_FRAMEGRABBER_SERVICENAME = u"com.sun.star.media.FrameGrabber_DirectX";
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 )
{
BSTR bstrFilename = SysAllocString(o3tl::toW(aLocalStr.getStr()));
if( !SUCCEEDED( pDet->put_Filename( bstrFilename ) ) )
{
// Shouldn't we free this string unconditionally, not only in case of failure?
// I cannot find information why do we pass a newly allocated BSTR to the put_Filename
// and if it frees the string internally
SysFreeString(bstrFilename);
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: */
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