Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================
#ifndef VBRHEADER_H
#define VBRHEADER_H
#ifdef _WIN32
#pragma once
#endif
// for XING VBR Header flags
#define FRAMES_FLAG 0x0001
#define BYTES_FLAG 0x0002
#define TOC_FLAG 0x0004
#define VBR_SCALE_FLAG 0x0008
class CMPAFile;
class CVBRHeader
{
public:
enum VBRHeaderType
{
NoHeader,
XINGHeader,
VBRIHeader
};
CVBRHeader( CMPAFile* pMPAFile, VBRHeaderType HeaderType, uint32 dwOffset );
~CVBRHeader(void);
static bool IsVBRHeaderAvailable( CMPAFile* pMPAFile, VBRHeaderType& HeaderType, uint32& dwOffset );
bool SeekPoint(float fPercent, uint32& dwSeekPoint);
uint32 m_dwBytesPerSec;
uint32 m_dwBytes; // total number of bytes
uint32 m_dwFrames; // total number of frames
private:
static uint32 m_dwXINGOffsets[2][2];
static bool CheckID( CMPAFile* pMPAFile, char ch0, char ch1, char ch2, char ch3, uint32& dwOffset );
static bool CheckXING( CMPAFile* pMPAFile, uint32& dwOffset );
static bool CheckVBRI( CMPAFile* pMPAFile, uint32& dwOffset );
bool ExtractLAMETag( uint32 dwOffset );
bool ExtractXINGHeader( uint32 dwOffset );
bool ExtractVBRIHeader( uint32 dwOffset );
uint32 SeekPointXING(float fPercent)const ;
uint32 SeekPointVBRI(float fPercent) const;
uint32 SeekPointByTimeVBRI(float fEntryTimeMS) const;
CMPAFile* m_pMPAFile;
public:
VBRHeaderType m_HeaderType;
uint32 m_dwOffset;
uint32 m_dwQuality; // quality (0..100)
int* m_pnToc; // TOC points for seeking (must be freed)
uint32 m_dwTableSize; // size of table (number of entries)
// only VBRI
float m_fDelay;
uint32 m_dwTableScale; // for seeking
uint32 m_dwBytesPerEntry;
uint32 m_dwFramesPerEntry;
uint32 m_dwVersion;
};
#endif // VBRHEADER_H