private void btnFrameStep_Click(object sender, EventArgs e)
{
if (_mediaStep != null)
{
_mediaStep.Step(FRAME_STEP_INCREMENT, null);
state = FilterState.Paused;
// m_bFrameStepping = true;
}
}
private void buttonFramestep_Click(object sender, System.EventArgs e)
{
if (frameStep != null)
{
mediaCtrl.Pause();
graphState = State.Paused;
frameStep.Step(1, null);
}
}
public int StepOneFrame()
{
int hr = 0;
// If the Frame Stepping interface exists, use it to step one frame
if (frameStep != null)
{
// The graph must be paused for frame stepping to work
if (currentState != PlayState.Paused)
{
PauseClip();
}
// Step the requested number of frames, if supported
hr = frameStep.Step(1, null);
}
return(hr);
}
/// <summary>
/// step the frames
/// </summary>
public void StepFrame(int framecount)
{
int i = frameStep.CanStep(0, null);
if (i == 0)
{
this.Play();
frameStep.Step(framecount, null);
this.PlayerState = PlayerState.SteppingFrames;
}
}
/// <summary>
/// Set to single frame step.
/// </summary>
public void SetSingleFrameStep()
{
int hr = 0;
// Stop and reset postion to beginning
if ((_currentState == PlayState.Running) || (_currentState == PlayState.Stopped))
{
// Pause the video.
Pause();
// Step the requested number of frames, if supported
hr = _frameStep.Step(1, null);
DsError.ThrowExceptionForHR(hr);
}
}
public void Step(int dwFrames)
{
if (m_pGraph == null)
{
throw new COMException("Graph in wrong state", DsResults.E_WrongState);
}
IVideoFrameStep pStep = (IVideoFrameStep)m_pGraph;
int hr = pStep.Step(dwFrames, null);
DsError.ThrowExceptionForHR(hr);
// To step, the Filter Graph Manager first runs the graph. When
// the step is complete, it pauses the graph. For the application,
// we can just report our new state as paused.
m_state = PlaybackState.Paused;
}
public int StepOneFrame()
{
int hr = 0;
// If the Frame Stepping interface exists, use it to step one frame
if (_frameStep != null)
{
// The graph must be paused for frame stepping to work
Pause();
// Step the requested number of frames, if supported
hr = _frameStep.Step(1, null);
}
// update the TimeSlider position
timeSliderTimer_Tick(null, null);
return(hr);
}
public virtual HRESULT StepForward()
{
if (m_FrameStep != null)
{
if (!IsPaused)
{
Pause();
}
int hr = m_FrameStep.Step(1, null);
if (hr < 0)
{
hr = m_MediaSeeking.GetCurrentPosition(out long _time);
DsLong _stop = (long)0;
var _ts = new TimeSpan(0, 0, 1);
_time += _ts.Ticks / 20;
DsLong _current = _time;
hr = m_MediaSeeking.SetPositions(_current, AMSeekingSeekingFlags.AbsolutePositioning, _stop, AMSeekingSeekingFlags.NoPositioning);
}
return((HRESULT)hr);
}
return((HRESULT)E_POINTER);
}
/// <summary>
/// Step a specified number of frames in the feed (this function only applies to a videw file feed).
/// </summary>
/// <param name="nFrames">Specifies the number of frames to step.</param>
/// <returns>After a successful step <i>true</i> is returned, otherwise when ignored or not running <i>false</i> is returned.</returns>
public bool Step(int nFrames)
{
if (m_mediaSeek == null)
{
return(false);
}
if (m_bRunning)
{
return(false);
}
if (m_videoFrameStep != null)
{
int hr = m_videoFrameStep.Step(nFrames, null);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
else
{
long lPosition;
int hr = m_mediaSeek.GetCurrentPosition(out lPosition);
long lStep = m_videoInfoHeader.AvgTimePerFrame * nFrames;
long lNewPosition = lPosition + lStep;
if (lNewPosition > Duration)
{
lNewPosition = Duration;
}
SetPosition(lNewPosition);
}
return(true);
}