CDXAReader.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 <atlbase.h>
#include "..\asyncreader\asyncio.h"
#include "..\asyncreader\asyncrdr.h"

class CCDXAStream : public CAsyncStream
{
private:
        enum 
        {
                RIFFCDXA_HEADER_SIZE = 44, // usually...
                RAW_SYNC_SIZE = 12, // 00 FF .. FF 00
                RAW_HEADER_SIZE = 4,
                RAW_SUBHEADER_SIZE = 8,
                RAW_DATA_SIZE = 2324,
                RAW_EDC_SIZE = 4,
                RAW_SECTOR_SIZE = 2352
        };

    CCritSec m_csLock;

        HANDLE m_hFile;
        LONGLONG m_llPosition, m_llLength;
        int m_nFirstSector;

        int m_nBufferedSector;
        BYTE m_sector[RAW_SECTOR_SIZE];

        bool LookForMediaSubType();

public:
        CCDXAStream();
        virtual ~CCDXAStream();

        bool Load(const WCHAR* fnw);

    HRESULT SetPointer(LONGLONG llPos);
    HRESULT Read(PBYTE pbBuffer, DWORD dwBytesToRead, BOOL bAlign, LPDWORD pdwBytesRead);
    LONGLONG Size(LONGLONG* pSizeAvailable);
    DWORD Alignment();
    void Lock();
        void Unlock();

        GUID m_subtype;
};

[uuid("D367878E-F3B8-4235-A968-F378EF1B9A44")]
class CCDXAReader 
        : public CAsyncReader
        , public IFileSourceFilter
{
        CCDXAStream m_stream;
        CStringW m_fn;

public:
    CCDXAReader(IUnknown* pUnk, HRESULT* phr);
        ~CCDXAReader();

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

        // IFileSourceFilter
        STDMETHODIMP Load(LPCOLESTR pszFileName, const AM_MEDIA_TYPE* pmt);
        STDMETHODIMP GetCurFile(LPOLESTR* ppszFileName, AM_MEDIA_TYPE* pmt);
};

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