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Diffstat (limited to '')
| -rw-r--r-- | avmedia/source/win/framegrabber.cxx | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/avmedia/source/win/framegrabber.cxx b/avmedia/source/win/framegrabber.cxx new file mode 100644 index 000000000..21b5dede6 --- /dev/null +++ b/avmedia/source/win/framegrabber.cxx @@ -0,0 +1,225 @@ +/* -*- 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> + +#define AVMEDIA_WIN_FRAMEGRABBER_IMPLEMENTATIONNAME "com.sun.star.comp.avmedia.FrameGrabber_DirectX" +#define AVMEDIA_WIN_FRAMEGRABBER_SERVICENAME "com.sun.star.media.FrameGrabber_DirectX" + +using namespace ::com::sun::star; + +namespace avmedia::win { + + +FrameGrabber::FrameGrabber( const uno::Reference< lang::XMultiServiceFactory >& rxMgr ) : + mxMgr( rxMgr ) +{ + ::CoInitializeEx( nullptr, COINIT_APARTMENTTHREADED ); +} + + +FrameGrabber::~FrameGrabber() +{ + ::CoUninitialize(); +} + +namespace { + +IMediaDet* implCreateMediaDet( const OUString& rURL ) +{ + IMediaDet* pDet = nullptr; + + if( SUCCEEDED( CoCreateInstance( CLSID_MediaDet, nullptr, CLSCTX_INPROC_SERVER, IID_IMediaDet, reinterpret_cast<void**>(&pDet) ) ) ) + { + 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->Release(); + pDet = nullptr; + } + } + } + + return pDet; +} + +} + +bool FrameGrabber::create( const OUString& rURL ) +{ + // just check if a MediaDet interface can be created with the given URL + IMediaDet* pDet = implCreateMediaDet( rURL ); + + if( pDet ) + { + maURL = rURL; + pDet->Release(); + pDet = nullptr; + } + else + maURL.clear(); + + return !maURL.isEmpty(); +} + + +uno::Reference< graphic::XGraphic > SAL_CALL FrameGrabber::grabFrame( double fMediaTime ) +{ + uno::Reference< graphic::XGraphic > xRet; + IMediaDet* pDet = implCreateMediaDet( maURL ); + + if( pDet ) + { + 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, 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() ) + { + const Graphic aGraphic( aBmp ); + xRet = aGraphic.GetXGraphic(); + } + } + } + catch( ... ) + { + } + } + } + + pDet->Release(); + } + + 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: */ |