BaseSource.h

/* 
 *      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
 *
 */

#pragma once

#include "..\..\..\DSUtil\DSUtil.h"

template<class TStream>
class CBaseSource
        : public CSource
        , public IFileSourceFilter
        , public IAMFilterMiscFlags
{
protected:
        CStringW m_fn;

public:
        CBaseSource(TCHAR* name, LPUNKNOWN lpunk, HRESULT* phr, const CLSID& clsid)
                : CSource(name, lpunk, clsid)
        {
                if(phr) *phr = S_OK;
        }

        DECLARE_IUNKNOWN;
    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv)
        {
                CheckPointer(ppv, E_POINTER);

                return 
                        QI(IFileSourceFilter)
                        QI(IAMFilterMiscFlags)
                        __super::NonDelegatingQueryInterface(riid, ppv);
        }

        // IFileSourceFilter

        STDMETHODIMP Load(LPCOLESTR pszFileName, const AM_MEDIA_TYPE* pmt)
        {
                // TODO: destroy any already existing pins and create new, now we are just going die nicely instead of doing it :)
                if(GetPinCount() > 0)
                        return VFW_E_ALREADY_CONNECTED;

                HRESULT hr = S_OK;
                if(!(new TStream(pszFileName, this, &hr)))
                        return E_OUTOFMEMORY;

                if(FAILED(hr))
                        return hr;

                m_fn = pszFileName;

                return S_OK;
        }

        STDMETHODIMP GetCurFile(LPOLESTR* ppszFileName, AM_MEDIA_TYPE* pmt)
        {
                if(!ppszFileName) return E_POINTER;
                
                if(!(*ppszFileName = (LPOLESTR)CoTaskMemAlloc((m_fn.GetLength()+1)*sizeof(WCHAR))))
                        return E_OUTOFMEMORY;

                wcscpy(*ppszFileName, m_fn);

                return S_OK;
        }

        // IAMFilterMiscFlags

        STDMETHODIMP_(ULONG) GetMiscFlags()
        {
                return AM_FILTER_MISC_FLAGS_IS_SOURCE;
        }
};

class CBaseStream 
        : public CSourceStream
        , public CSourceSeeking
{
protected:
        CCritSec m_cSharedState;

        REFERENCE_TIME m_AvgTimePerFrame;
        REFERENCE_TIME m_rtSampleTime, m_rtPosition;

        BOOL m_bDiscontinuity, m_bFlushing;

        HRESULT OnThreadStartPlay();
        HRESULT OnThreadCreate();

private:
        void UpdateFromSeek();
        STDMETHODIMP SetRate(double dRate);

        HRESULT ChangeStart();
    HRESULT ChangeStop();
    HRESULT ChangeRate() {return S_OK;}

public:
    CBaseStream(TCHAR* name, CSource* pParent, HRESULT* phr);
        virtual ~CBaseStream();

    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv);

    HRESULT FillBuffer(IMediaSample* pSample);

    virtual HRESULT FillBuffer(IMediaSample* pSample, int nFrame, BYTE* pOut, long& len /*in+out*/) = 0;

        STDMETHODIMP Notify(IBaseFilter* pSender, Quality q);
};

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