protected override double GetMediaPosition()
{
double val = 0;
if (mediaPosition != null)
{
int hr = mediaPosition.get_CurrentPosition(out val);
DsError.ThrowExceptionForHR(hr);
}
return(val * durationScaleFactor);
}
public double GetCurrentPosition()
{
double result = 0;
m_mediaPosition.get_CurrentPosition(out result);
return(result);
}
public override void SeekRelative(double dTime)
{
if (m_state != PlayState.Init)
{
if (mediaCtrl != null && mediaPos != null)
{
double dCurTime;
mediaPos.get_CurrentPosition(out dCurTime);
dTime = dCurTime + dTime;
if (dTime < 0.0d)
{
dTime = 0.0d;
}
if (dTime < Duration)
{
mediaPos.put_CurrentPosition(dTime);
}
}
}
}
void TestPosition()
{
int hr;
double pllTime;
Thread.Sleep(1500);
hr = m_mediaPosition.get_CurrentPosition(out pllTime);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(pllTime > 1.0, "get_CurrentPosition");
hr = m_mediaPosition.put_CurrentPosition(0);
DsError.ThrowExceptionForHR(hr);
hr = m_mediaPosition.get_CurrentPosition(out pllTime);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(pllTime < 1.0, "get_CurrentPosition");
}
//
//handler to update the Position label and move the trackbar
//tick postion, we set isTimer to true, then changing the
//trackbar Value property will generate a call to the ValueChanged
//handler but we don't want to seek the filter, so ValueChanged
//check if isTimer is true and ignore timer update to seek the filter
//
private void timer1_Tick(object sender, System.EventArgs e)
{
if (isSeeking)
{
isTimer = true;
double currentPosition;
mediaPos.get_CurrentPosition(out currentPosition);
trackBar1.Value = (int)(currentPosition * 100.0);
isTimer = false;
minutes = (int)currentPosition / 60;
seconds = (int)currentPosition % 60;
label1.Text = "Position: " + minutes.ToString("D2")
+ ":m" + seconds.ToString("D2") + ":s";
}
}
//set the trackBar1'value equel the video'progress
private void updateTimeBarThread()
{
double time;
int volu;
while (true)
{
mediaPosition.get_CurrentPosition(out time);
Console.WriteLine(time);
basicAudio.get_Volume(out volu);
Console.WriteLine(volu);
this.BeginInvoke(new MethodInvoker(() =>
{
trackBar1.Value = (int)time;
}));
Thread.Sleep(1000);
}
}
/// <summary>
/// Queries the current video source for its capabilities regarding seeking and time info.
/// The graph should be fully constructed for accurate information
/// </summary>
protected void QuerySeekingCapabilities()
{
try
{
_mediaSeeking.SetTimeFormat(TimeFormat.MediaTime);
//get capabilities from the graph, and see what it supports that interests us
AMSeekingSeekingCapabilities caps;
int r = _mediaSeeking.GetCapabilities(out caps);
long lTest = 0;
double dblTest = 0;
if (r != 0)
{
_seek_canGetCurrentPos = false;
_seek_canSeek = false;
_seek_canGetDuration = false;
}
else //if we were able to read the capabilities, then determine if the capability works, both by checking the
// advertisement, and actually trying it out.
{
_seek_canSeek = ((caps & AMSeekingSeekingCapabilities.CanSeekAbsolute) == AMSeekingSeekingCapabilities.CanSeekAbsolute) &&
(_mediaSeeking.SetPositions(0, AMSeekingSeekingFlags.AbsolutePositioning,
null, AMSeekingSeekingFlags.NoPositioning) == 0);
_seek_canGetDuration = ((caps & AMSeekingSeekingCapabilities.CanGetDuration) == AMSeekingSeekingCapabilities.CanGetDuration) &&
(_mediaSeeking.GetDuration(out lTest) == 0);
_seek_canGetCurrentPos = ((caps & AMSeekingSeekingCapabilities.CanGetCurrentPos) == AMSeekingSeekingCapabilities.CanGetCurrentPos) &&
(_mediaSeeking.GetCurrentPosition(out lTest) == 0);
}
//check capabilities for the IMediaPosition interface
_pos_canSeek = (_mediaPosition.put_CurrentPosition(0) == 0);
_pos_canGetDuration = (_mediaPosition.get_Duration(out dblTest) == 0);
_pos_canGetCurrentPos = (_mediaPosition.get_CurrentPosition(out dblTest) == 0);
}
catch (Exception)
{
_seek_canSeek = false;
_pos_canSeek = false;
}
}