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