BaseMuxerOutputPin.cpp

/* 
 *      Copyright (C) 2003-2005 Gabest
 *      http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *   
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *   
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#include "StdAfx.h"
#include "BaseMuxerOutputPin.h"

//
// CBaseMuxerOutputPin
//

CBaseMuxerOutputPin::CBaseMuxerOutputPin(TCHAR* pName, CBaseFilter* pFilter, CCritSec* pLock, HRESULT* phr)
        : CBaseOutputPin(pName, pFilter, pLock, phr, L"Output")
{
}

CBaseMuxerOutputPin::~CBaseMuxerOutputPin()
{
}

HRESULT CBaseMuxerOutputPin::DecideBufferSize(IMemAllocator* pAlloc, ALLOCATOR_PROPERTIES* pProperties)
{
    ASSERT(pAlloc);
    ASSERT(pProperties);

    HRESULT hr = NOERROR;

        pProperties->cBuffers = 1;
        pProperties->cbBuffer = 1;

    ALLOCATOR_PROPERTIES Actual;
    if(FAILED(hr = pAlloc->SetProperties(pProperties, &Actual))) return hr;

    if(Actual.cbBuffer < pProperties->cbBuffer) return E_FAIL;
    ASSERT(Actual.cBuffers == pProperties->cBuffers);

    return NOERROR;
}

HRESULT CBaseMuxerOutputPin::CheckMediaType(const CMediaType* pmt)
{
        return pmt->majortype == MEDIATYPE_Stream && pmt->subtype == MEDIASUBTYPE_NULL
                ? S_OK
                : E_INVALIDARG;
}

HRESULT CBaseMuxerOutputPin::GetMediaType(int iPosition, CMediaType* pmt)
{
    CAutoLock cAutoLock(m_pLock);

        if(iPosition < 0) return E_INVALIDARG;
        if(iPosition > 0) return VFW_S_NO_MORE_ITEMS;

        pmt->ResetFormatBuffer();
        pmt->InitMediaType();
        pmt->majortype = MEDIATYPE_Stream;
        pmt->subtype = MEDIASUBTYPE_NULL;
        pmt->formattype = FORMAT_None;

        return S_OK;
}

STDMETHODIMP CBaseMuxerOutputPin::Notify(IBaseFilter* pSender, Quality q)
{
        return E_NOTIMPL;
}

---