FLACDecodeInputPin.h

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//===========================================================================
//Copyright (C) 2003, 2004 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
//NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
//SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//===========================================================================

#pragma once

//Local Includes
#include "FLACdecoderdllstuff.h"

//External Includes
#include "FLACPushDecoder.h"
#include "IOggDecoder.h"
#include <libOOOgg/OggPacket.h>
#include <libOOOgg/StampedOggPacket.h>

//STL Includes
//debug only
#include <fstream>
//
using namespace std;


class FLACDecodeInputPin
        //Base Classes
        :       public AbstractTransformInputPin
        ,       public IOggDecoder
{
public:
        //COM Initialisation
        DECLARE_IUNKNOWN
        STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void **ppv);

        //Constructors
        FLACDecodeInputPin(AbstractTransformFilter* inFilter, CCritSec* inFilterLock, AbstractTransformOutputPin* inOutputPin, vector<CMediaType*> inAcceptableMediaTypes);
        virtual ~FLACDecodeInputPin(void);

        virtual HRESULT SetMediaType(const CMediaType* inMediaType);
        virtual HRESULT CheckMediaType(const CMediaType *inMediaType);

        virtual STDMETHODIMP BeginFlush();
        virtual STDMETHODIMP EndFlush();
        virtual STDMETHODIMP EndOfStream(void);
        virtual STDMETHODIMP NewSegment(REFERENCE_TIME inStartTime, REFERENCE_TIME inStopTime, double inRate);

        virtual STDMETHODIMP GetAllocatorRequirements(ALLOCATOR_PROPERTIES *outRequestedProps);

        virtual STDMETHODIMP FLACDecodeInputPin::Receive(IMediaSample* inSample);

        //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();
        
protected:

        static const unsigned long DECODED_BUFFER_SIZE = 1<<20;         //1 Meg buffer
        
        static const unsigned long FLAC_NUM_BUFFERS = 75;
        static const unsigned long FLAC_BUFFER_SIZE = 65536; //Check

        //Implementation of pure virtuals from AbstractTransformInputPin
        virtual bool ConstructCodec();
        virtual void DestroyCodec();
        virtual HRESULT TransformData(unsigned char* inBuf, long inNumBytes);

        //Member Data
        bool mGotMetaData;
        FLACPushDecoder mFLACDecoder;
        CCritSec* mCodecLock;
        unsigned long mUptoFrame;

        OggPacket* mMetadataPacket;

        enum eFLACType {
                FT_UNKNOWN,
                FT_CLASSIC,
                FT_OGG_FLAC_1,
        };

        eFLACType mFLACType;

        enum eFLACSetupState {
                VSS_SEEN_NOTHING,
                VSS_SEEN_BOS,
                VSS_SEEN_COMMENT,
                VSS_ALL_HEADERS_SEEN,
                VSS_ERROR
        };

        eFLACSetupState mSetupState;

        unsigned long mDecodedByteCount;
        unsigned char* mDecodedBuffer;

        __int64 mRateNumerator;
        static const __int64 RATE_DENOMINATOR = 65536;


        
        //debug only
        //fstream debugLog;
        //

};

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