1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 #include "macavf_framegrabber.hxx" 23 #include "macavf_player.hxx" 24 25 #include <tools/stream.hxx> 26 #include <vcl/graph.hxx> 27 #include <vcl/cvtgrf.hxx> 28 #include <unotools/localfilehelper.hxx> 29 30 using namespace ::com::sun::star; 31 32 namespace avmedia { namespace macavf { 33 34 // ---------------- 35 // - FrameGrabber - 36 // ---------------- 37 38 FrameGrabber::FrameGrabber( const uno::Reference< lang::XMultiServiceFactory >& /*rxMgr*/ ) 39 : mpImageGen( NULL ) 40 {} 41 42 // ------------------------------------------------------------------------------ 43 44 FrameGrabber::~FrameGrabber() 45 { 46 if( mpImageGen ) 47 CFRelease( mpImageGen ); 48 } 49 50 // ------------------------------------------------------------------------------ 51 52 bool FrameGrabber::create( const ::rtl::OUString& rURL ) 53 { 54 // TODO: use AVPlayer's movie directly instead of loading it here? 55 56 NSString* pNSStr = [NSString stringWithCharacters:rURL.getStr() length:rURL.getLength()]; 57 NSURL* pNSURL = [NSURL URLWithString: [pNSStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 58 AVAsset* pMovie = [AVURLAsset URLAssetWithURL:pNSURL options:nil]; 59 if( !pMovie ) 60 { 61 OSL_TRACE( "AVGrabber::create() cannot load url=\"%s\"", [pNSStr UTF8String] ); 62 return false; 63 } 64 if( [[pMovie tracksWithMediaType:AVMediaTypeVideo] count] == 0) 65 { 66 OSL_TRACE( "AVGrabber::create() found no video in url=\"%s\"", [pNSStr UTF8String] ); 67 return false; 68 } 69 70 mpImageGen = [AVAssetImageGenerator assetImageGeneratorWithAsset:pMovie]; 71 CFRetain( mpImageGen ); 72 return true; 73 } 74 75 // ------------------------------------------------------------------------------ 76 77 uno::Reference< graphic::XGraphic > SAL_CALL FrameGrabber::grabFrame( double fMediaTime ) 78 throw (uno::RuntimeException) 79 { 80 uno::Reference< graphic::XGraphic > xRet; 81 if( !mpImageGen ) 82 return xRet; 83 OSL_TRACE( "AVPlayer::grabFrame( %.3fsec)", fMediaTime ); 84 85 // get the requested image from the movie 86 CGImage* pCGImage = [mpImageGen copyCGImageAtTime:CMTimeMakeWithSeconds(fMediaTime,1000) actualTime:NULL error:NULL]; 87 88 // convert the image to a TIFF-formatted byte-array 89 CFMutableDataRef pCFData = CFDataCreateMutable( kCFAllocatorDefault, 0 ); 90 CGImageDestination* pCGImgDest = CGImageDestinationCreateWithData( pCFData, kUTTypeTIFF, 1, 0 ); 91 CGImageDestinationAddImage( pCGImgDest, pCGImage, NULL ); 92 CGImageDestinationFinalize( pCGImgDest ); 93 CFRelease( pCGImgDest ); 94 const long nBitmapLen = CFDataGetLength( pCFData ); 95 void* pBitmapBytes = (void*)CFDataGetBytePtr( pCFData ); 96 97 // convert the image into the return-value type which is a graphic::XGraphic 98 SvMemoryStream aMemStm( pBitmapBytes, nBitmapLen, STREAM_READ | STREAM_WRITE ); 99 Graphic aGraphic; 100 if( GraphicConverter::Import( aMemStm, aGraphic, CVT_TIF ) == ERRCODE_NONE ) 101 xRet = aGraphic.GetXGraphic(); 102 103 // clean up resources 104 CFRelease( pCFData ); 105 return xRet; 106 } 107 108 // ------------------------------------------------------------------------------ 109 110 ::rtl::OUString SAL_CALL FrameGrabber::getImplementationName( ) 111 throw (uno::RuntimeException) 112 { 113 return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( AVMEDIA_MACAVF_FRAMEGRABBER_IMPLEMENTATIONNAME ) ); 114 } 115 116 // ------------------------------------------------------------------------------ 117 118 sal_Bool SAL_CALL FrameGrabber::supportsService( const ::rtl::OUString& ServiceName ) 119 throw (uno::RuntimeException) 120 { 121 return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( AVMEDIA_MACAVF_FRAMEGRABBER_SERVICENAME ) ); 122 } 123 124 // ------------------------------------------------------------------------------ 125 126 uno::Sequence< ::rtl::OUString > SAL_CALL FrameGrabber::getSupportedServiceNames( ) 127 throw (uno::RuntimeException) 128 { 129 uno::Sequence< ::rtl::OUString > aRet(1); 130 aRet[0] = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM ( AVMEDIA_MACAVF_FRAMEGRABBER_SERVICENAME ) ); 131 132 return aRet; 133 } 134 135 } // namespace macavf 136 } // namespace avmedia 137 138