CWE-ou-minkata/Sources/Plasma/PubUtilLib/plAudioCore/plOGGCodec.h

/*==LICENSE==*

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*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  plOGGCodec - Plasma codec support for the OGG/Vorbis file format.       //
//                                                                          //
//////////////////////////////////////////////////////////////////////////////

#ifndef _plOGGCodec_h
#define _plOGGCodec_h

#include "plAudioFileReader.h"
#include "plFileSystem.h"


//// Class Definition ////////////////////////////////////////////////////////

struct OggVorbis_File;

class plOGGCodec : public plAudioFileReader
{
public:

    plOGGCodec( const plFileName &path, plAudioCore::ChannelSelect whichChan = plAudioCore::kAll );
    virtual ~plOGGCodec();

    enum DecodeFormat
    {
        k8bitUnsigned,
        k16bitSigned
    };

    enum DecodeFlags
    {
        kFastSeeking = 0x01
    };
    
    virtual plWAVHeader &GetHeader( void );

    virtual void    Close( void );

    virtual uint32_t  GetDataSize( void ) { return fDataSize / fChannelAdjust; }
    virtual float   GetLengthInSecs( void );

    virtual bool    SetPosition( uint32_t numBytes );
    virtual bool    Read( uint32_t numBytes, void *buffer );
    virtual uint32_t  NumBytesLeft( void );

    virtual bool    IsValid( void ) { return ( fOggFile != nil ) ? true : false; }

    static void     SetDecodeFormat( DecodeFormat f ) { fDecodeFormat = f; }
    static void     SetDecodeFlag( uint8_t flag, bool on ) { if( on ) fDecodeFlags |= flag; else fDecodeFlags &= ~flag; }
    static uint8_t  GetDecodeFlags( void ) { return fDecodeFlags; }
    void            ResetWaveHeaderRef() { fCurHeaderPos = 0; }
    void            BuildActualWaveHeader();
    bool            ReadFromHeader(int numBytes, void *data); // read from Actual wave header

protected:

    enum
    {
        kPCMFormatTag = 1
    };

    plFileName      fFilename;
    FILE           *fFileHandle;
    OggVorbis_File *fOggFile;

    plWAVHeader     fHeader, fFakeHeader;
    uint32_t        fDataStartPos, fCurrDataPos, fDataSize;

    plAudioCore::ChannelSelect  fWhichChannel;
    uint32_t                    fChannelAdjust, fChannelOffset;

    static DecodeFormat fDecodeFormat;
    static uint8_t      fDecodeFlags;
    uint8_t *           fHeadBuf;
    int                 fCurHeaderPos;

    void    IError( const char *msg );
    void    IOpen( const plFileName &path, plAudioCore::ChannelSelect whichChan = plAudioCore::kAll );
};

#endif //_plOGGCodec_h