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Diffstat (limited to 'avmedia/source/macavf/framegrabber.mm')
-rw-r--r-- | avmedia/source/macavf/framegrabber.mm | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/avmedia/source/macavf/framegrabber.mm b/avmedia/source/macavf/framegrabber.mm new file mode 100644 index 000000000..e0b8bad61 --- /dev/null +++ b/avmedia/source/macavf/framegrabber.mm @@ -0,0 +1,108 @@ +/* -*- 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 "framegrabber.hxx" +#include "player.hxx" + +#include <sal/log.hxx> +#include <tools/stream.hxx> +#include <vcl/graph.hxx> +#include <vcl/cvtgrf.hxx> +#include <unotools/localfilehelper.hxx> + +using namespace ::com::sun::star; + +namespace avmedia::macavf { + +FrameGrabber::FrameGrabber() +: mpImageGen( nullptr ) +{} + + +FrameGrabber::~FrameGrabber() +{ + if( mpImageGen ) + CFRelease( mpImageGen ); +} + + +bool FrameGrabber::create( AVAsset* pMovie ) +{ + if( [[pMovie tracksWithMediaType:AVMediaTypeVideo] count] == 0) + { + SAL_WARN("avmedia", "AVGrabber::create() found no video content!" ); + return false; + } + + mpImageGen = [AVAssetImageGenerator assetImageGeneratorWithAsset:pMovie]; + CFRetain( mpImageGen ); + return true; +} + + +uno::Reference< graphic::XGraphic > SAL_CALL FrameGrabber::grabFrame( double fMediaTime ) +{ + uno::Reference< graphic::XGraphic > xRet; + if( !mpImageGen ) + return xRet; + + // get the requested image from the movie + CGImage* pCGImage = [mpImageGen copyCGImageAtTime:CMTimeMakeWithSeconds(fMediaTime,1000) actualTime:nullptr error:nullptr]; + + // convert the image to a TIFF-formatted byte-array + CFMutableDataRef pCFData = CFDataCreateMutable( kCFAllocatorDefault, 0 ); + SAL_WNODEPRECATED_DECLARATIONS_PUSH // kUTTypeTIFF (12.0) + CGImageDestination* pCGImgDest = CGImageDestinationCreateWithData( pCFData, kUTTypeTIFF, 1, nullptr ); + SAL_WNODEPRECATED_DECLARATIONS_POP + CGImageDestinationAddImage( pCGImgDest, pCGImage, nullptr ); + CGImageDestinationFinalize( pCGImgDest ); + CFRelease( pCGImgDest ); + const CFIndex nBitmapLen = CFDataGetLength( pCFData ); + UInt8 * pBitmapBytes = const_cast<UInt8 *>(CFDataGetBytePtr( pCFData )); + + // convert the image into the return-value type which is a graphic::XGraphic + SvMemoryStream aMemStm( pBitmapBytes, nBitmapLen, StreamMode::READ | StreamMode::WRITE ); + Graphic aGraphic; + if( GraphicConverter::Import( aMemStm, aGraphic, ConvertDataFormat::TIF ) == ERRCODE_NONE ) + xRet = aGraphic.GetXGraphic(); + + // clean up resources + CFRelease( pCFData ); + return xRet; +} + + +OUString SAL_CALL FrameGrabber::getImplementationName( ) +{ + return AVMEDIA_MACAVF_FRAMEGRABBER_IMPLEMENTATIONNAME; +} + +sal_Bool SAL_CALL FrameGrabber::supportsService( const OUString& ServiceName ) +{ + return ServiceName == AVMEDIA_MACAVF_FRAMEGRABBER_SERVICENAME; +} + +uno::Sequence< OUString > SAL_CALL FrameGrabber::getSupportedServiceNames( ) +{ + return { AVMEDIA_MACAVF_FRAMEGRABBER_SERVICENAME }; +} + +} // namespace avmedia::macavf + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |