public virtual bool SetPlaybackRate(double value)
{
if (_graphBuilder == null)
{
return(false);
}
IMediaSeeking mediaSeeking = _graphBuilder as IMediaSeeking;
if (mediaSeeking == null)
{
return(false);
}
double currentRate;
if (mediaSeeking.GetRate(out currentRate) == 0 && currentRate != value)
{
bool result = mediaSeeking.SetRate(value) == 0;
if (result)
{
FirePlaybackStateChanged();
}
return(result);
}
return(false);
}
/// <summary>
/// Test Get/Set Rate
/// </summary>
void TestRate()
{
int hr;
double dRate1, dRate2;
// Read the current play rate
hr = m_ims.GetRate(out dRate1);
Marshal.ThrowExceptionForHR(hr);
// Change the rate
hr = m_ims.SetRate(dRate1 + 1);
Marshal.ThrowExceptionForHR(hr);
// Re-read the rate
hr = m_ims.GetRate(out dRate2);
Marshal.ThrowExceptionForHR(hr);
// See if we got the right answer
Debug.Assert(dRate1 + 1 == dRate2, "Get/Set Rate");
}
double IPlayer.GetRate()
{
double rate = 1.0;
if (this.graphBuilder != null)
{
IMediaSeeking mediaSeeking = this.graphBuilder as IMediaSeeking;
if (mediaSeeking != null)
{
int hr = mediaSeeking.GetRate(out rate);
}
}
return(rate);
}
public virtual bool SetPlaybackRate(double value)
{
if (_graphBuilder == null || _ms == null)
{
return(false);
}
double currentRate;
if (_ms.GetRate(out currentRate) == 0 && currentRate != value)
{
bool result = _ms.SetRate(value) == 0;
if (result)
{
FirePlaybackStateChanged();
}
return(result);
}
return(false);
}
protected virtual HRESULT PreparePlayback()
{
m_MediaControl = (IMediaControl)m_GraphBuilder;
m_BasicVideo = (IBasicVideo)m_GraphBuilder;
m_MediaSeeking = (IMediaSeeking)m_GraphBuilder;
m_VideoWindow = (IVideoWindow)m_GraphBuilder;
m_MediaEventEx = (IMediaEventEx)m_GraphBuilder;
m_FrameStep = (IVideoFrameStep)m_GraphBuilder;
m_MediaPosition = (IMediaPosition)m_GraphBuilder;
SettingUpVideoWindow();
int hr = m_MediaEventEx.SetNotifyWindow(m_EventControl.Handle, WM_GRAPHNOTIFY, Marshal.GetIUnknownForObject(this));
Debug.Assert(hr == 0);
SetVolume(m_bMute ? -10000 : m_iVolume);
if (m_dRate != 1.0)
{
m_MediaSeeking.SetRate(m_dRate);
m_MediaSeeking.GetRate(out m_dRate);
}
OnPlaybackReady?.Invoke(this, EventArgs.Empty);
return((HRESULT)hr);
}
private void loadVideo(String videoPath)
{
videoFilepath = videoPath;
videoFileName.Text = getDisplayVideoName();
if (graph != null)
{
graph = null;
}
if (mediaControl != null)
{
// Stop media playback
this.mediaControl.Stop();
mediaControl = null;
}
if (videoWindow != null)
{
videoWindow.put_Owner(IntPtr.Zero);
videoWindow = null;
}
if (mediaSeeking != null)
{
mediaSeeking = null;
}
if (basicAudio != null)
{
basicAudio = null;
}
GC.Collect();
/* if (mediaPosition != null)
{
mediaPosition = null;
}*/
graph = (IGraphBuilder)new FilterGraph();
mediaControl = (IMediaControl)graph;
//mediaPosition = (IMediaPosition)graph;
videoWindow = (IVideoWindow)graph;
mediaSeeking = (IMediaSeeking)graph;
basicAudio = (IBasicAudio)graph;
AviSplitter spliter = new AviSplitter();
graph.AddFilter((IBaseFilter)spliter, null);
graph.RenderFile(videoPath, null);
graph.SetDefaultSyncSource();
/*
* AMSeekingSeekingCapabilities cap = AMSeekingSeekingCapabilities.CanGetCurrentPos;
if (mediaSeeking.CheckCapabilities(ref cap) > 0)
{
this.consoleErreur.AppendText("Impossible de recuperer la position de la frame");
}
* */
videoWindow.put_Owner(videoPanel.Handle);
videoWindow.put_MessageDrain(videoPanel.Handle);
videoWindow.put_WindowStyle(WindowStyle.Child);
videoWindow.put_WindowStyleEx(WindowStyleEx.ControlParent);
videoWindow.put_Left(0);
videoWindow.put_Top(0);
videoWindow.put_Width(videoPanel.Width);
videoWindow.put_Height(videoPanel.Height);
//positionTrackbar.Enabled = true;
speedTrackBar.Enabled = true;
mediaSeeking.SetTimeFormat(TimeFormat.Frame);
double rate;
mediaSeeking.GetRate(out rate);
rateText.Text = rate.ToString();
speedTrackBar.Value = (int)(speedTrackBar.Maximum * rate / 2);
trackBar1.Value = trackBar1.Maximum / 2;
this.basicAudio.put_Volume(-5000 + 5000 * trackBar1.Value / trackBar1.Maximum);
//mediaPosition.put_Rate(0.5);
running = false;
frameChanged = false;
}
protected virtual HRESULT PreparePlayback()
{
m_MediaControl = (IMediaControl)m_GraphBuilder;
m_BasicVideo = (IBasicVideo)m_GraphBuilder;
m_MediaSeeking = (IMediaSeeking)m_GraphBuilder;
m_VideoWindow = (IVideoWindow)m_GraphBuilder;
m_MediaEventEx = (IMediaEventEx)m_GraphBuilder;
m_FrameStep = (IVideoFrameStep)m_GraphBuilder;
SettingUpVideoWindow();
int hr = m_MediaEventEx.SetNotifyWindow(m_EventControl.Handle, WM_GRAPHNOTIFY, Marshal.GetIUnknownForObject(this));
Debug.Assert(hr == 0);
SetVolume(m_bMute ? -10000 : m_iVolume);
if (m_dRate != 1.0)
{
m_MediaSeeking.SetRate(m_dRate);
m_MediaSeeking.GetRate(out m_dRate);
}
if (OnPlaybackReady != null) OnPlaybackReady(this, EventArgs.Empty);
return (HRESULT)hr;
}
