IMFTimecodeTranslate::EndConvertHNSToTimecode method (mfidl.h)
Completes an asynchronous request to convert time in 100-nanosecond units to Society of Motion Picture and Television Engineers (SMPTE) time code.
Syntax
HRESULT EndConvertHNSToTimecode(
[in] IMFAsyncResult *pResult,
[out] PROPVARIANT *pPropVarTimecode
);
Parameters
[in] pResult
A pointer to the IMFAsyncResult interface. Pass in the same pointer that your callback object received in the IMFAsyncCallback::Invoke method.
[out] pPropVarTimecode
A pointer to a PROPVARIANT that receives the converted time. The vt member of the PROPVARIANT structure is set to VT_I8. The hVal.QuadPart member contains the converted time in binary coded decimal (BCD) form. See Remarks.
Return value
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Remarks
Call this method after the IMFTimecodeTranslate::BeginConvertHNSToTimecode method completes asynchronously.
The value of pPropVarTimecode is a 64-bit unsigned value typed as a LONGLONG. The upper DWORD contains the range. (A range is a continuous series of time codes.) The lower DWORD contains the time code in the form of a hexadecimal number 0xhhmmssff, where each 2-byte sequence is read as a decimal value.
HRESULT ParseTimeCode(
const PROPVARIANT& var,
DWORD *pdwRange,
DWORD *pdwFrames,
DWORD *pdwSeconds,
DWORD *pdwMinutes,
DWORD *pdwHours
)
{
if (var.vt != VT_I8)
{
return E_INVALIDARG;
}
ULONGLONG ullTimeCode = (ULONGLONG)var.hVal.QuadPart;
DWORD dwTimecode = (DWORD)(ullTimeCode & 0xFFFFFFFF);
*pdwRange = (DWORD)(ullTimeCode >> 32);
*pdwFrames = dwTimecode & 0x0000000F;
*pdwFrames += (( dwTimecode & 0x000000F0) >> 4 ) * 10;
*pdwSeconds = ( dwTimecode & 0x00000F00) >> 8;
*pdwSeconds += (( dwTimecode & 0x0000F000) >> 12 ) * 10;
*pdwMinutes = ( dwTimecode & 0x000F0000) >> 16;
*pdwMinutes += (( dwTimecode & 0x00F00000) >> 20 ) * 10;
*pdwHours = ( dwTimecode & 0x0F000000) >> 24;
*pdwHours += (( dwTimecode & 0xF0000000) >> 28 ) * 10;
return S_OK;
}
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | mfidl.h |