Поделиться через

IScanningTuner::ScanDown

  • Статья
 
Microsoft DirectShow 9.0

IScanningTuner::ScanDown

The ScanDown method changes the channel to the next lower channel with valid programming, pauses for the specified number of milliseconds, then repeats until canceled.

Syntax

  HRESULT ScanDown(
  long MillisecondsPause
);

Parameters

MillisecondsPause

[in] Variable of type long that specifies the number of milliseconds to pause.

Return Values

When the method succeeds, it returns S_OK. Otherwise it returns an HRESULT error code.

Remarks

The call returns immediately, while the scan continues in the background. The scan can be canceled by calling any other tuning operation.

Currently the DVB-C and DVB-S Network Provider filters do not implement this method, and return E_NOTIMPL. The method is implemented for DVB-T.

Requirements

Header: Include Tuner.h.

See Also