void CMediaPlayerDlg::StartSeekTimer()
{
// Cancel any pending timer event
StopSeekTimer();
// Create a new timer
g_wTimerID = SetTimer(MP_TIMERID, MP_TICKLEN, NULL);
}
void StartSeekTimer()
{
// Cancel any pending timer event
StopSeekTimer();
// Create a new timer
g_wTimerID = SetTimer(g_hwnd, TIMERID, TICKLEN, NULL);
}
void CMediaPlayerDlg::OnPause()
{
if (g_psCurrent_MP == State_Paused)
{
MPRunMedia();
StartSeekTimer();
}
else
{
StopSeekTimer();
MPPauseMedia();
}
}
void CMediaPlayerDlg::OnStop()
{
HRESULT hr;
if (!pMC_MP || !pMS_MP)
return;
// Stop playback immediately with IMediaControl::Stop().
StopSeekTimer();
MPStopMedia();
// Wait for the stop to propagate to all filters
OAFilterState fs;
hr = pMC_MP->GetState(500, &fs);
if (FAILED(hr))
{
MPRetailOutput(TEXT("Failed to read graph state! hr=0x%x\r\n"), hr);
}
// Reset to beginning of media clip
LONGLONG pos=0;
hr = pMS_MP->SetPositions(&pos, AM_SEEKING_AbsolutePositioning ,
NULL, AM_SEEKING_NoPositioning);
if (FAILED(hr))
{
MPRetailOutput(TEXT("Failed to seek to beginning of media! hr=0x%x\r\n"), hr);
}
// Display the first frame of the media clip, if it contains video.
// StopWhenReady() pauses all filters internally (which allows the video
// renderer to queue and display the first video frame), after which
// it sets the filters to the stopped state. This enables easy preview
// of the video's poster frame.
hr = pMC_MP->StopWhenReady();
if (FAILED(hr))
{
MPRetailOutput(TEXT("Failed in StopWhenReady! hr=0x%x\r\n"), hr);
}
// Reset slider bar and position label back to zero
ReadMediaPosition();
}
HRESULT CMediaPlayerDlg::FreeDirectShow(void)
{
HRESULT hr=S_OK;
StopSeekTimer();
MPStopMedia();
// Remember the current volume slider position so that the
// same volume level can be applied to the next clip
HandleVolumeSlider(0);
// Disable event callbacks
if (pME_MP)
hr = pME_MP->SetNotifyWindow((OAHWND)NULL, 0, 0);
// Hide video window and remove owner. This is not necessary here,
// since we are about to destroy the filter graph, but it is included
// for demonstration purposes. Remember to hide the video window and
// clear its owner when destroying a window that plays video.
if(pVW_MP)
{
hr = pVW_MP->put_Visible(OAFALSE);
hr = pVW_MP->put_Owner(NULL);
}
SAFE_RELEASE(pMC_MP);
SAFE_RELEASE(pMS_MP);
SAFE_RELEASE(pVW_MP);
SAFE_RELEASE(pBV_MP);
SAFE_RELEASE(pME_MP);
SAFE_RELEASE(pGB_MP);
SAFE_RELEASE(pBA_MP);
return hr;
}
