VIDPROP.CPP

//==========================================================================; 
// 
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY 
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR 
//  PURPOSE. 
// 
//  Copyright (c) 1992 - 1997  Microsoft Corporation.  All Rights Reserved. 
// 
//--------------------------------------------------------------------------; 
 
#include <streams.h> 
#include <sampvid.h> 
#include <vidprop.h> 
 
// This class implements a property page dialog for the video renderer. We 
// expose certain statistics from the quality management implementation. In 
// particular we have two edit fields that show the number of frames we have 
// actually drawn and the number of frames that we dropped. The number of 
// frames we dropped does NOT represent the total number dropped in any play 
// back sequence (as expressed through MCI status frames skipped) since the 
// quality management protocol may have negotiated with the source filter for 
// it to send fewer frames in the first place. Dropping frames in the source 
// filter is nearly always a more efficient mechanism when we are flooded 
 
 
// 
// Constructor 
// 
CQualityProperties::CQualityProperties(LPUNKNOWN pUnk,HRESULT *phr) : 
    CBasePropertyPage(NAME("Quality Page"),pUnk,IDD_QUALITY,IDS_NAME), 
    m_pQualProp(NULL) 
{ 
    ASSERT(phr); 
 
} // (Constructor) 
 
 
// 
// CreateInstance 
// 
// Create a quality properties object 
// 
CUnknown * WINAPI CQualityProperties::CreateInstance(LPUNKNOWN lpUnk, HRESULT *phr) 
{ 
    return new CQualityProperties(lpUnk, phr); 
 
} // CreateInstance 
 
 
// 
// OnConnect 
// 
// Give us the filter to communicate with 
// 
HRESULT CQualityProperties::OnConnect(IUnknown *pUnknown) 
{ 
    ASSERT(m_pQualProp == NULL); 
 
    // Ask the renderer for it's IQualProp interface 
 
    HRESULT hr = pUnknown->QueryInterface(IID_IQualProp,(void **)&m_pQualProp); 
    if (FAILED(hr)) { 
        return E_NOINTERFACE; 
    } 
 
    ASSERT(m_pQualProp); 
 
    // Get quality data for our page 
 
    m_pQualProp->get_FramesDroppedInRenderer(&m_iDropped); 
    m_pQualProp->get_FramesDrawn(&m_iDrawn); 
    m_pQualProp->get_AvgFrameRate(&m_iFrameRate); 
    m_pQualProp->get_Jitter(&m_iFrameJitter); 
    m_pQualProp->get_AvgSyncOffset(&m_iSyncAvg); 
    m_pQualProp->get_DevSyncOffset(&m_iSyncDev); 
    return NOERROR; 
 
}  // OnConnect 
 
 
// 
// OnDisconnect 
// 
// Release any IQualProp interface we have 
// 
HRESULT CQualityProperties::OnDisconnect() 
{ 
    // Release the interface 
 
    if (m_pQualProp == NULL) { 
        return E_UNEXPECTED; 
    } 
 
    m_pQualProp->Release(); 
    m_pQualProp = NULL; 
    return NOERROR; 
 
}  // OnDisconnect 
 
 
// 
// OnActivate 
// 
// Set the text fields in the property page 
// 
HRESULT CQualityProperties::OnActivate() 
{ 
    SetEditFieldData(); 
    return NOERROR; 
 
} // OnActivate 
 
 
// 
// SetEditFieldData 
// 
// Initialise the property page fields 
// 
void CQualityProperties::SetEditFieldData() 
{ 
    ASSERT(m_pQualProp); 
    TCHAR buffer[50]; 
 
    wsprintf(buffer,"%d", m_iDropped); 
    SendDlgItemMessage(m_Dlg, IDD_QDROPPED, WM_SETTEXT, 0, (DWORD) (LPSTR) buffer); 
    wsprintf(buffer,"%d", m_iDrawn); 
    SendDlgItemMessage(m_Dlg, IDD_QDRAWN, WM_SETTEXT, 0, (DWORD) (LPSTR) buffer); 
    wsprintf(buffer,"%d.%02d", m_iFrameRate/100, m_iFrameRate%100); 
    SendDlgItemMessage(m_Dlg, IDD_QAVGFRM, WM_SETTEXT, 0, (DWORD) (LPSTR) buffer); 
    wsprintf(buffer,"%d", m_iFrameJitter); 
    SendDlgItemMessage(m_Dlg, IDD_QJITTER, WM_SETTEXT, 0, (DWORD) (LPSTR) buffer); 
    wsprintf(buffer,"%d", m_iSyncAvg); 
    SendDlgItemMessage(m_Dlg, IDD_QSYNCAVG, WM_SETTEXT, 0, (DWORD) (LPSTR) buffer); 
    wsprintf(buffer,"%d", m_iSyncDev); 
    SendDlgItemMessage(m_Dlg, IDD_QSYNCDEV, WM_SETTEXT, 0, (DWORD) (LPSTR) buffer); 
 
} // SetEditFieldData