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#ifndef NULLSOFT_FLVUTIL_H
#define NULLSOFT_FLVUTIL_H
#include <memory.h>
#include <bfc/platform/types.h>
namespace FLV
{
// reads 32 bits from data and converts from big endian
inline uint32_t Read32(uint8_t *data)
{
uint32_t returnVal;
#ifdef __BIG_ENDIAN__
returnVal = *(uint32_t *)(&data[0]);
#else
// need to swap endianness
uint8_t *swap = (uint8_t *)&returnVal;
swap[0]=data[3];
swap[1]=data[2];
swap[2]=data[1];
swap[3]=data[0];
#endif
return returnVal;
}
// reads 24 bits from data, converts from big endian, and returns as a 32bit int
inline uint32_t Read24(uint8_t *data)
{
uint32_t returnVal=0;
uint8_t *swap = (uint8_t *)&returnVal;
#ifdef __BIG_ENDIAN__
swap[1]=data[0];
swap[2]=data[1];
swap[3]=data[2];
returnVal = *(uint32_t *)(&data[0]);
#else
// need to swap endianness
swap[0]=data[2];
swap[1]=data[1];
swap[2]=data[0];
#endif
return returnVal;
}
// reads 16 bits from data and converts from big endian
inline uint16_t Read16(uint8_t *data)
{
uint16_t returnVal;
#ifdef __BIG_ENDIAN__
returnVal = *(uint16_t *)(&data[0]);
#else
// need to swap endianness
uint8_t *swap = (uint8_t *)&returnVal;
swap[0]=data[1];
swap[1]=data[0];
#endif
return returnVal;
}
// reads 16 bits from data and converts from big endian
inline uint8_t Read8(uint8_t *data)
{
uint8_t returnVal;
returnVal = *(uint8_t *)(&data[0]);
return returnVal;
}
// reads a double from data
inline double ReadDouble(uint8_t *data)
{
double returnVal;
#ifdef __BIG_ENDIAN__
memcpy(&returnVal, data, 8);
#else
uint8_t *swap = (uint8_t *)&returnVal;
swap[0]=data[7];
swap[1]=data[6];
swap[2]=data[5];
swap[3]=data[4];
swap[4]=data[3];
swap[5]=data[2];
swap[6]=data[1];
swap[7]=data[0];
#endif
return returnVal;
}
}
#endif
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