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//------------------------------------------------------------------------------
// File: SeekPT.cpp
//
// Desc: DirectShow base classes.
//
// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
#include <streams.h>
#include "seekpt.h"
//==================================================================
// CreateInstance
// This goes in the factory template table to create new instances
// If there is already a mapper instance - return that, else make one
// and save it in a static variable so that forever after we can return that.
//==================================================================
CUnknown * CSeekingPassThru::CreateInstance(__inout_opt LPUNKNOWN pUnk, __inout HRESULT *phr)
{
return new CSeekingPassThru(NAME("Seeking PassThru"),pUnk, phr);
}
STDMETHODIMP CSeekingPassThru::NonDelegatingQueryInterface(REFIID riid, __deref_out void ** ppv)
{
if (riid == IID_ISeekingPassThru) {
return GetInterface((ISeekingPassThru *) this, ppv);
} else {
if (m_pPosPassThru &&
(riid == IID_IMediaSeeking ||
riid == IID_IMediaPosition)) {
return m_pPosPassThru->NonDelegatingQueryInterface(riid,ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
}
CSeekingPassThru::CSeekingPassThru( __in_opt LPCTSTR pName, __inout_opt LPUNKNOWN pUnk, __inout HRESULT *phr )
: CUnknown(pName, pUnk, phr),
m_pPosPassThru(NULL)
{
}
CSeekingPassThru::~CSeekingPassThru()
{
delete m_pPosPassThru;
}
STDMETHODIMP CSeekingPassThru::Init(BOOL bRendererSeeking, IPin *pPin)
{
HRESULT hr = NOERROR;
if (m_pPosPassThru) {
hr = E_FAIL;
} else {
m_pPosPassThru =
bRendererSeeking ?
new CRendererPosPassThru(
NAME("Render Seeking COM object"),
(IUnknown *)this,
&hr,
pPin) :
new CPosPassThru(
NAME("Render Seeking COM object"),
(IUnknown *)this,
&hr,
pPin);
if (!m_pPosPassThru) {
hr = E_OUTOFMEMORY;
} else {
if (FAILED(hr)) {
delete m_pPosPassThru;
m_pPosPassThru = NULL;
}
}
}
return hr;
}
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