73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#ifndef VBRHEADER_H
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#define VBRHEADER_H
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#ifdef _WIN32
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#pragma once
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#endif
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// for XING VBR Header flags
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#define FRAMES_FLAG 0x0001
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#define BYTES_FLAG 0x0002
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#define TOC_FLAG 0x0004
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#define VBR_SCALE_FLAG 0x0008
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class CMPAFile;
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class CVBRHeader
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{
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public:
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enum VBRHeaderType
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{
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NoHeader,
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XINGHeader,
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VBRIHeader
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};
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CVBRHeader( CMPAFile* pMPAFile, VBRHeaderType HeaderType, uint32 dwOffset );
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~CVBRHeader(void);
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static bool IsVBRHeaderAvailable( CMPAFile* pMPAFile, VBRHeaderType& HeaderType, uint32& dwOffset );
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bool SeekPoint(float fPercent, uint32& dwSeekPoint);
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uint32 m_dwBytesPerSec;
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uint32 m_dwBytes; // total number of bytes
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uint32 m_dwFrames; // total number of frames
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private:
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static uint32 m_dwXINGOffsets[2][2];
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static bool CheckID( CMPAFile* pMPAFile, char ch0, char ch1, char ch2, char ch3, uint32& dwOffset );
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static bool CheckXING( CMPAFile* pMPAFile, uint32& dwOffset );
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static bool CheckVBRI( CMPAFile* pMPAFile, uint32& dwOffset );
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bool ExtractLAMETag( uint32 dwOffset );
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bool ExtractXINGHeader( uint32 dwOffset );
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bool ExtractVBRIHeader( uint32 dwOffset );
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uint32 SeekPointXING(float fPercent)const ;
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uint32 SeekPointVBRI(float fPercent) const;
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uint32 SeekPointByTimeVBRI(float fEntryTimeMS) const;
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CMPAFile* m_pMPAFile;
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public:
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VBRHeaderType m_HeaderType;
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uint32 m_dwOffset;
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uint32 m_dwQuality; // quality (0..100)
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int* m_pnToc; // TOC points for seeking (must be freed)
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uint32 m_dwTableSize; // size of table (number of entries)
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// only VBRI
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float m_fDelay;
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uint32 m_dwTableScale; // for seeking
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uint32 m_dwBytesPerEntry;
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uint32 m_dwFramesPerEntry;
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uint32 m_dwVersion;
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};
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#endif // VBRHEADER_H
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