C# IMediaSeeking.GetCurrentPosition方法代码示例

        public static int getCurPos(IMediaSeeking mediaSeeking, double fps)
        {
            if (mediaSeeking == null) return 1;
            long cur;
            mediaSeeking.GetCurrentPosition(out cur);

            if (!isInFrames(mediaSeeking))
                cur = refTime2frame(cur,fps);

            return (int)cur;
        }

//.........这里部分代码省略.........
       Cleanup();
       return false;
     }
     hr = graphBuilder.Connect(pinOut0, pinIn0);
     if (hr != 0)
     {
       Log.Error("TSReader2MP4: FAILED: unable to connect audio pins :0x{0:X}", hr);
       Cleanup();
       return false;
     }
     hr = graphBuilder.Connect(pinOut1, pinIn1);
     if (hr != 0)
     {
       Log.Error("TSReader2MP4: FAILED: unable to connect video pins :0x{0:X}", hr);
       Cleanup();
       return false;
     }
     //add encoders, muxer & filewriter
     if (!AddCodecs(graphBuilder, info)) return false;
     //setup graph controls
     mediaControl = graphBuilder as IMediaControl;
     mediaSeeking = tsreaderSource as IMediaSeeking;
     mediaEvt = graphBuilder as IMediaEventEx;
     mediaPos = graphBuilder as IMediaPosition;
     //get file duration
     Log.Info("TSReader2MP4: Get duration of recording");
     long lTime = 5 * 60 * 60;
     lTime *= 10000000;
     long pStop = 0;
     hr = mediaSeeking.SetPositions(new DsLong(lTime), AMSeekingSeekingFlags.AbsolutePositioning, new DsLong(pStop),
                                    AMSeekingSeekingFlags.NoPositioning);
     if (hr == 0)
     {
       long lStreamPos;
       mediaSeeking.GetCurrentPosition(out lStreamPos); // stream position
       m_dDuration = lStreamPos;
       lTime = 0;
       mediaSeeking.SetPositions(new DsLong(lTime), AMSeekingSeekingFlags.AbsolutePositioning, new DsLong(pStop),
                                 AMSeekingSeekingFlags.NoPositioning);
     }
     double duration = m_dDuration / 10000000d;
     Log.Info("TSReader2MP4: recording duration: {0}", MediaPortal.Util.Utils.SecondsToHMSString((int)duration));
     //run the graph to initialize the filters to be sure
     hr = mediaControl.Run();
     if (hr != 0)
     {
       Log.Error("TSReader2MP4: FAILED: unable to start graph :0x{0:X}", hr);
       Cleanup();
       return false;
     }
     int maxCount = 20;
     while (true)
     {
       long lCurrent;
       mediaSeeking.GetCurrentPosition(out lCurrent);
       double dpos = (double)lCurrent;
       dpos /= 10000000d;
       System.Threading.Thread.Sleep(100);
       if (dpos >= 2.0d) break;
       maxCount--;
       if (maxCount <= 0) break;
     }
     mediaControl.Stop();
     FilterState state;
     mediaControl.GetState(500, out state);
     GC.Collect();
     GC.Collect();
     GC.Collect();
     GC.WaitForPendingFinalizers();
     graphBuilder.RemoveFilter(mp4Muxer);
     graphBuilder.RemoveFilter(h264Encoder);
     graphBuilder.RemoveFilter(aacEncoder);
     graphBuilder.RemoveFilter((IBaseFilter)fileWriterFilter);
     if (!AddCodecs(graphBuilder, info)) return false;
     //Set Encoder quality & Muxer settings
     if (!EncoderSet(graphBuilder, info)) return false;
     //start transcoding - run the graph
     Log.Info("TSReader2MP4: start transcoding");
     //setup flow control
     //need to leverage CBAsePin, CPullPin & IAsyncReader methods.
     IAsyncReader synchVideo = null;
     mediaSample = VideoCodec as IMediaSample;
     hr = synchVideo.SyncReadAligned(mediaSample);
     //So we only parse decoder output whent the encoders are ready.
     hr = mediaControl.Run();
     if (hr != 0)
     {
       Log.Error("TSReader2MP4: FAILED:unable to start graph :0x{0:X}", hr);
       Cleanup();
       return false;
     }
   }
   catch (Exception ex)
   {
     Log.Error("TSReader2MP4: Unable create graph: {0}", ex.Message);
     Cleanup();
     return false;
   }
   return true;
 }

//.........这里部分代码省略.........
         return false;
       }
     }
     Log.Info("TSReader2WMV: connect tsreader->audio/video decoders");
     //connect output #0 (audio) of tsreader->audio decoder input pin 0
     //connect output #1 (video) of tsreader->video decoder input pin 0
     pinIn0 = DsFindPin.ByDirection(AudioCodec, PinDirection.Input, 0); //audio
     pinIn1 = DsFindPin.ByDirection(VideoCodec, PinDirection.Input, 0); //video
     if (pinIn0 == null || pinIn1 == null)
     {
       Log.Error("TSReader2WMV: FAILED: unable to get pins of video/audio codecs");
       Cleanup();
       return false;
     }
     hr = graphBuilder.Connect(pinOut0, pinIn0);
     if (hr != 0)
     {
       Log.Error("TSReader2WMV: FAILED: unable to connect audio pins :0x{0:X}", hr);
       Cleanup();
       return false;
     }
     hr = graphBuilder.Connect(pinOut1, pinIn1);
     if (hr != 0)
     {
       Log.Error("TSReader2WMV: FAILED: unable to connect video pins :0x{0:X}", hr);
       Cleanup();
       return false;
     }
     string outputFilename = System.IO.Path.ChangeExtension(info.file, ".wmv");
     if (!AddWmAsfWriter(outputFilename, quality, standard)) return false;
     Log.Info("TSReader2WMV: start pre-run");
     mediaControl = graphBuilder as IMediaControl;
     mediaSeeking = tsreaderSource as IMediaSeeking;
     mediaEvt = graphBuilder as IMediaEventEx;
     mediaPos = graphBuilder as IMediaPosition;
     //get file duration
     long lTime = 5 * 60 * 60;
     lTime *= 10000000;
     long pStop = 0;
     hr = mediaSeeking.SetPositions(new DsLong(lTime), AMSeekingSeekingFlags.AbsolutePositioning, new DsLong(pStop),
                                    AMSeekingSeekingFlags.NoPositioning);
     if (hr == 0)
     {
       long lStreamPos;
       mediaSeeking.GetCurrentPosition(out lStreamPos); // stream position
       m_dDuration = lStreamPos;
       lTime = 0;
       mediaSeeking.SetPositions(new DsLong(lTime), AMSeekingSeekingFlags.AbsolutePositioning, new DsLong(pStop),
                                 AMSeekingSeekingFlags.NoPositioning);
     }
     double duration = m_dDuration / 10000000d;
     Log.Info("TSReader2WMV: movie duration:{0}", Util.Utils.SecondsToHMSString((int)duration));
     hr = mediaControl.Run();
     if (hr != 0)
     {
       Log.Error("TSReader2WMV: FAILED: unable to start graph :0x{0:X}", hr);
       Cleanup();
       return false;
     }
     int maxCount = 20;
     while (true)
     {
       long lCurrent;
       mediaSeeking.GetCurrentPosition(out lCurrent);
       double dpos = (double)lCurrent;
       dpos /= 10000000d;
       System.Threading.Thread.Sleep(100);
       if (dpos >= 2.0d) break;
       maxCount--;
       if (maxCount <= 0) break;
     }
     Log.Info("TSReader2WMV: pre-run done");
     Log.Info("TSReader2WMV: Get duration of movie");
     mediaControl.Stop();
     FilterState state;
     mediaControl.GetState(500, out state);
     GC.Collect();
     GC.Collect();
     GC.Collect();
     GC.WaitForPendingFinalizers();
     Log.Info("TSReader2WMV: reconnect mpeg2 video codec->ASF WM Writer");
     graphBuilder.RemoveFilter(fileWriterbase);
     if (!AddWmAsfWriter(outputFilename, quality, standard)) return false;
     Log.Info("TSReader2WMV: Start transcoding");
     hr = mediaControl.Run();
     if (hr != 0)
     {
       Log.Error("TSReader2WMV:FAILED:unable to start graph :0x{0:X}", hr);
       Cleanup();
       return false;
     }
   }
   catch (Exception e)
   {
     // TODO: Handle exceptions.
     Log.Error("unable to transcode file:{0} message:{1}", info.file, e.Message);
     return false;
   }
   return true;
 }

        private bool CheckGraphConversion(ref IMediaSeeking mediaSeeking)
        {
            int hr;
            IMediaEvent mediaEvent = (IMediaEvent)currentFilterGraph;

            // Check the graph / conversion is going ok, and raise any progress events
            EventCode statusCode;
            hr = mediaEvent.WaitForCompletion(100, out statusCode);
            switch (statusCode)
            {
                case EventCode.Complete:
                    return true;
                case 0:  // Still going - fire event with an update on where we are
                    if (mediaSeeking != null)
                    {
                        long curPos;
                        mediaSeeking.GetCurrentPosition(out curPos);
                        long length;
                        mediaSeeking.GetDuration(out length);
                        double progress = curPos * 100.0 / (double)length;
                        if (ConversionProgressChanged != null)
                            ConversionProgressChanged(new object(), new ProgressChangedEventArgs(progress));
                    }
                    return false;
                default:  // Error
                    EventCode tryCode;
                    IntPtr lp1, lp2;
                    hr = mediaEvent.GetEvent(out tryCode, out lp1, out lp2, 200);
                    DsError.ThrowExceptionForHR(hr);
                    throw new Exception(statusCode.ToString());
            }
        }