OGMDecodeInputPin.h

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//===========================================================================
//Copyright (C) 2003-2006 Zentaro Kavanagh
//
//Redistribution and use in source and binary forms, with or without
//modification, are permitted provided that the following conditions
//are met:
//
//- Redistributions of source code must retain the above copyright
//  notice, this list of conditions and the following disclaimer.
//
//- Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//
//- Neither the name of Zentaro Kavanagh nor the names of contributors 
//  may be used to endorse or promote products derived from this software 
//  without specific prior written permission.
//
//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
//PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
//CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
//EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
//PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
//PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
//LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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//SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//===========================================================================
#pragma once

#include "ogmdecoderdllstuff.h"
#include "IOggDecoder.h"

class OGMDecodeFilter;

class OGMDecodeInputPin
        :       public CTransformInputPin
        ,       public IOggDecoder
{
public:
        DECLARE_IUNKNOWN
        STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void **ppv);

        OGMDecodeInputPin(OGMDecodeFilter* inParent, HRESULT* outHR);
        virtual ~OGMDecodeInputPin(void);

        virtual STDMETHODIMP GetAllocatorRequirements(ALLOCATOR_PROPERTIES *outRequestedProps);
        virtual HRESULT SetMediaType(const CMediaType* inMediaType);
        virtual HRESULT CheckMediaType(const CMediaType *inMediaType);

        

        //IOggDecoder Interface
        virtual LOOG_INT64 convertGranuleToTime(LOOG_INT64 inGranule);
        virtual LOOG_INT64 mustSeekBefore(LOOG_INT64 inGranule);
        virtual IOggDecoder::eAcceptHeaderResult showHeaderPacket(OggPacket* inCodecHeaderPacket);
        virtual string getCodecShortName();
        virtual string getCodecIdentString();

        enum eOGMMediaType {
                OGM_VIDEO_TYPE,
                OGM_AUDIO_TYPE,
                OGM_TEXT_TYPE,
                OGM_UNKNOWN_TYPE
        };

        eOGMMediaType getOGMMediaType()                         {               return mOGMMediaType;           }
        VIDEOINFOHEADER* getVideoFormatBlock()          {               return mVideoFormatBlock;       }
        WAVEFORMATEX* getAudioFormatBlock()                     {               return mAudioFormatBlock;       }
protected:
        enum eOGMSetupState {
                VSS_SEEN_NOTHING,
                VSS_SEEN_BOS,
                VSS_SEEN_COMMENT,
                VSS_ALL_HEADERS_SEEN,
                VSS_ERROR
        };

        eOGMMediaType mOGMMediaType;

        eOGMSetupState mSetupState;
        bool handleHeaderPacket(OggPacket* inHeaderPack);
        bool handleAudioHeaderPacket(OggPacket* inHeaderPack);
        bool handleVideoHeaderPacket(OggPacket* inHeaderPack);
        bool handleTextHeaderPacket(OggPacket* inHeaderPack);

        VIDEOINFOHEADER* mVideoFormatBlock;
        WAVEFORMATEX* mAudioFormatBlock;
        __int64 mGranuleRateNumerator;
        __int64 mGranuleRateDenominator;

        static const unsigned long OGM_IDENT_HEADER_SIZE = 57;
        static const unsigned long OGM_NUM_BUFFERS = 50;
        static const unsigned long OGM_BUFFER_SIZE = 1024*512*3;;

};

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