xref: /trunk/main/avmedia/source/win/framegrabber.cxx (revision 45fd3b9a)
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21 
22 
23 
24 #include <tools/prewin.h>
25 #if defined _MSC_VER
26 #pragma warning(push, 1)
27 #pragma warning(disable: 4917)
28 #endif
29 #include <windows.h>
30 #include <objbase.h>
31 #include <strmif.h>
32 #include <Amvideo.h>
33 #if defined(_MSC_VER) && (_MSC_VER < 1500)
34 #include <Qedit.h>
35 #else
36 #include "interface.hxx"
37 #endif
38 #include <uuids.h>
39 #if defined _MSC_VER
40 #pragma warning(pop)
41 #endif
42 #include <tools/postwin.h>
43 
44 #include "framegrabber.hxx"
45 #include "player.hxx"
46 
47 #include <tools/stream.hxx>
48 #include <vcl/graph.hxx>
49 #include <unotools/localfilehelper.hxx>
50 #include <vcl/dibtools.hxx>
51 
52 #define AVMEDIA_WIN_FRAMEGRABBER_IMPLEMENTATIONNAME "com.sun.star.comp.avmedia.FrameGrabber_DirectX"
53 #define AVMEDIA_WIN_FRAMEGRABBER_SERVICENAME "com.sun.star.media.FrameGrabber_DirectX"
54 
55 using namespace ::com::sun::star;
56 
57 namespace avmedia { namespace win {
58 
59 // ----------------
60 // - FrameGrabber -
61 // ----------------
62 
63 FrameGrabber::FrameGrabber( const uno::Reference< lang::XMultiServiceFactory >& rxMgr ) :
64     mxMgr( rxMgr )
65 {
66     ::CoInitialize( NULL );
67 }
68 
69 // ------------------------------------------------------------------------------
70 
71 FrameGrabber::~FrameGrabber()
72 {
73     ::CoUninitialize();
74 }
75 
76 // ------------------------------------------------------------------------------
77 
78 IMediaDet* FrameGrabber::implCreateMediaDet( const ::rtl::OUString& rURL ) const
79 {
80     IMediaDet* pDet = NULL;
81 
82     if( SUCCEEDED( CoCreateInstance( CLSID_MediaDet, NULL, CLSCTX_INPROC_SERVER, IID_IMediaDet, (void**) &pDet ) ) )
83     {
84 		String aLocalStr;
85 
86 		if( ::utl::LocalFileHelper::ConvertURLToPhysicalName( rURL, aLocalStr ) && aLocalStr.Len() )
87 		{
88             if( !SUCCEEDED( pDet->put_Filename( ::SysAllocString( reinterpret_cast<LPCOLESTR>(aLocalStr.GetBuffer()) ) ) ) )
89             {
90                 pDet->Release();
91                 pDet = NULL;
92             }
93         }
94     }
95 
96     return pDet;
97 }
98 
99 // ------------------------------------------------------------------------------
100 
101 bool FrameGrabber::create( const ::rtl::OUString& rURL )
102 {
103     // just check if a MediaDet interface can be created with the given URL
104     IMediaDet*  pDet = implCreateMediaDet( rURL );
105 
106     if( pDet )
107     {
108         maURL = rURL;
109         pDet->Release();
110         pDet = NULL;
111     }
112     else
113         maURL = ::rtl::OUString();
114 
115     return( maURL.getLength() > 0 );
116 }
117 
118 // ------------------------------------------------------------------------------
119 
120 uno::Reference< graphic::XGraphic > SAL_CALL FrameGrabber::grabFrame( double fMediaTime )
121     throw (uno::RuntimeException)
122 {
123     uno::Reference< graphic::XGraphic > xRet;
124     IMediaDet*                          pDet = implCreateMediaDet( maURL );
125 
126     if( pDet )
127     {
128         double  fLength;
129         long    nStreamCount;
130         bool    bFound = false;
131 
132         if( SUCCEEDED( pDet->get_OutputStreams( &nStreamCount ) ) )
133         {
134             for( long n = 0; ( n < nStreamCount ) && !bFound; ++n )
135             {
136                 GUID aMajorType;
137 
138                 if( SUCCEEDED( pDet->put_CurrentStream( n ) )  &&
139                     SUCCEEDED( pDet->get_StreamType( &aMajorType ) ) &&
140                     ( aMajorType == MEDIATYPE_Video ) )
141                 {
142                     bFound = true;
143                 }
144             }
145         }
146 
147         if( bFound &&
148             ( S_OK == pDet->get_StreamLength( &fLength ) ) &&
149             ( fLength > 0.0 ) && ( fMediaTime >= 0.0 ) && ( fMediaTime <= fLength ) )
150         {
151             AM_MEDIA_TYPE   aMediaType;
152             long            nWidth = 0, nHeight = 0, nSize = 0;
153 
154             if( SUCCEEDED( pDet->get_StreamMediaType( &aMediaType ) ) )
155             {
156                 if( ( aMediaType.formattype == FORMAT_VideoInfo ) &&
157                     ( aMediaType.cbFormat >= sizeof( VIDEOINFOHEADER ) ) )
158                 {
159                     VIDEOINFOHEADER* pVih = reinterpret_cast< VIDEOINFOHEADER* >( aMediaType.pbFormat );
160 
161                     nWidth = pVih->bmiHeader.biWidth;
162                     nHeight = pVih->bmiHeader.biHeight;
163 
164                     if( nHeight < 0 )
165                         nHeight *= -1;
166                 }
167 
168                 if( aMediaType.cbFormat != 0 )
169                 {
170                     ::CoTaskMemFree( (PVOID) aMediaType.pbFormat );
171                     aMediaType.cbFormat = 0;
172                     aMediaType.pbFormat = NULL;
173                 }
174 
175                 if( aMediaType.pUnk != NULL )
176                 {
177                     aMediaType.pUnk->Release();
178                     aMediaType.pUnk = NULL;
179                 }
180             }
181 
182             if( ( nWidth > 0 ) && ( nHeight > 0 ) &&
183                 SUCCEEDED( pDet->GetBitmapBits( 0, &nSize, NULL, nWidth, nHeight ) ) &&
184                 ( nSize > 0  ) )
185             {
186                 char* pBuffer = new char[ nSize ];
187 
188                 try
189                 {
190                     if( SUCCEEDED( pDet->GetBitmapBits( fMediaTime, NULL, pBuffer, nWidth, nHeight ) ) )
191                     {
192                         SvMemoryStream  aMemStm( pBuffer, nSize, STREAM_READ | STREAM_WRITE );
193                         Bitmap          aBmp;
194 
195                         if( ReadDIB(aBmp, aMemStm, false ) && !aBmp.IsEmpty() )
196                         {
197                             const Graphic aGraphic( aBmp );
198                             xRet = aGraphic.GetXGraphic();
199                         }
200                     }
201                 }
202                 catch( ... )
203                 {
204                 }
205 
206                 delete [] pBuffer;
207             }
208         }
209 
210         pDet->Release();
211     }
212 
213     return xRet;
214 }
215 
216 // ------------------------------------------------------------------------------
217 
218 ::rtl::OUString SAL_CALL FrameGrabber::getImplementationName(  )
219     throw (uno::RuntimeException)
220 {
221     return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( AVMEDIA_WIN_FRAMEGRABBER_IMPLEMENTATIONNAME ) );
222 }
223 
224 // ------------------------------------------------------------------------------
225 
226 sal_Bool SAL_CALL FrameGrabber::supportsService( const ::rtl::OUString& ServiceName )
227     throw (uno::RuntimeException)
228 {
229     return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( AVMEDIA_WIN_FRAMEGRABBER_SERVICENAME ) );
230 }
231 
232 // ------------------------------------------------------------------------------
233 
234 uno::Sequence< ::rtl::OUString > SAL_CALL FrameGrabber::getSupportedServiceNames(  )
235     throw (uno::RuntimeException)
236 {
237     uno::Sequence< ::rtl::OUString > aRet(1);
238     aRet[0] = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM ( AVMEDIA_WIN_FRAMEGRABBER_SERVICENAME ) );
239 
240     return aRet;
241 }
242 
243 } // namespace win
244 } // namespace avmedia
245