AForge.Video.DirectShow.VideoCapabilities.FromStreamConfig C# (CSharp) Method

        static internal VideoCapabilities[] FromStreamConfig( IAMStreamConfig videoStreamConfig )
        {
            if ( videoStreamConfig == null )
                throw new ArgumentNullException( "videoStreamConfig" );

            // ensure this device reports capabilities
            int count, size;
            int hr = videoStreamConfig.GetNumberOfCapabilities( out count, out size );

            if ( hr != 0 )
                Marshal.ThrowExceptionForHR( hr );

            if ( count <= 0 )
                throw new NotSupportedException( "This video device does not report capabilities." );

            if ( size > Marshal.SizeOf( typeof( VideoStreamConfigCaps ) ) )
                throw new NotSupportedException( "Unable to retrieve video device capabilities. This video device requires a larger VideoStreamConfigCaps structure." );

            // group capabilities with similar parameters
            Dictionary<ulong, VideoCapabilities> videocapsList = new Dictionary<ulong, VideoCapabilities>( );

            for ( int i = 0; i < count; i++ )
            {
                try
                {
                    VideoCapabilities vc = new VideoCapabilities( videoStreamConfig, i );

                    ulong key = ( ( (ulong) vc.FrameSize.Height ) << 32 ) |
                                ( ( (ulong) vc.FrameSize.Width ) << 16 ) |
                                  ( (ulong) (uint) vc.FrameRate );

                    if ( !videocapsList.ContainsKey( key ) )
                    {
                        videocapsList.Add( key, vc );
                    }
                }
                catch
                {
                }
            }

            VideoCapabilities[] videocaps = new VideoCapabilities[videocapsList.Count];
            videocapsList.Values.CopyTo( videocaps, 0 );

            return videocaps;
        }