/// <summary>
/// Retrieves the presentation time of the sample.
/// </summary>
/// <param name="sample">A valid IMFSample instance.</param>
/// <param name="sampleTime">Receives the presentation time.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult GetSampleTime(this IMFSample sample, out TimeSpan sampleTime)
{
if (sample == null)
{
throw new ArgumentNullException("sample");
}
long tmp;
HResult hr = sample.GetSampleDuration(out tmp);
sampleTime = hr.Succeeded() ? TimeSpan.FromTicks(tmp) : default(TimeSpan);
return(hr);
}
private void DuplicateSample(IMFSample pInSample, out IMFSample pOutSample)
{
MFError throwonhr;
int flags;
long lTime;
throwonhr = MFExtern.MFCreateSample(out pOutSample);
throwonhr = pInSample.CopyAllItems(pOutSample);
HResult hr = pInSample.GetSampleDuration(out lTime);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleDuration(lTime);
}
hr = pInSample.GetSampleTime(out lTime);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleTime(lTime);
}
hr = pInSample.GetSampleFlags(out flags);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleFlags(flags);
}
IMFMediaBuffer mb;
throwonhr = MFExtern.MFCreateMemoryBuffer(m_imageHeightInPixels * m_imageWidthInPixels * 4, out mb);
try
{
// Set the data size on the output buffer.
throwonhr = mb.SetCurrentLength(m_cbImageSizeOutput);
throwonhr = pOutSample.AddBuffer(mb);
}
finally
{
SafeRelease(mb);
}
}
protected bool IsSampleTimePassed(IMFClock pClock, IMFSample pSample)
{
Debug.Assert(pClock != null);
Debug.Assert(pSample != null);
if (pSample == null || pClock == null)
{
throw new COMException("IsSampleTimePassed", E_Pointer);
}
int hr;
bool bRet = false;
long hnsTimeNow = 0;
long hnsSystemTime = 0;
long hnsSampleStart = 0;
long hnsSampleDuration = 0;
// The sample might lack a time-stamp or a duration, and the
// clock might not report a time.
try
{
hr = pClock.GetCorrelatedTime(0, out hnsTimeNow, out hnsSystemTime);
MFError.ThrowExceptionForHR(hr);
hr = pSample.GetSampleTime(out hnsSampleStart);
MFError.ThrowExceptionForHR(hr);
hr = pSample.GetSampleDuration(out hnsSampleDuration);
MFError.ThrowExceptionForHR(hr);
if (hnsSampleStart + hnsSampleDuration < hnsTimeNow)
{
bRet = true;
}
}
catch { }
return bRet;
}
