//---------------------------------------------------------------------------
bool File_DolbyE::Descramble_16bit ()
{
int16u ScrambleMask;
Get_S2 (16, ScrambleMask, "Scramble mask");
int16u Size=((BigEndian2int16u(Buffer+Buffer_Offset+(size_t)Element_Size-Data_BS_Remain()/8)^ScrambleMask)>>2)&0x3FF;
if (Data_BS_Remain()<(size_t)((Size+1)*BitDepth)) //+1 for additional unknown word
return false; //There is a problem
int8u* Temp=Descrambled_Buffer+(size_t)Element_Size-Data_BS_Remain()/8;
for (int16u Pos=0; Pos<Size; Pos++)
int16u2BigEndian(Temp+Pos*2, BigEndian2int16u(Temp+Pos*2)^ScrambleMask);
return true;
}
//---------------------------------------------------------------------------
// Big Endian - float 80 bits
float80 BigEndian2float80(const char* Liste)
{
//sign 1 bit
//exponent 15 bit
//integer? 1 bit
//significand 63 bit
//Retrieving data
int16u Integer1=BigEndian2int16u(Liste);
int64u Integer2=BigEndian2int64u(Liste+2);
//Retrieving elements
bool Sign =(Integer1&0x8000)?true:false;
int16u Exponent= Integer1&0x7FFF;
int64u Mantissa= Integer2&0x7FFFFFFFFFFFFFFFLL; //Only 63 bits, 1 most significant bit is explicit
//Some computing
if (Exponent==0 || Exponent==0x7FFF)
return 0; //These are denormalised numbers, NANs, and other horrible things
Exponent-=0x3FFF; //Bias
float80 Answer=(((float80)Mantissa)/9223372036854775808.0+1.0)*std::pow((float)2, (int)Exponent); //(1+Mantissa) * 2^Exponent
if (Sign)
Answer=-Answer;
return (float80)Answer;
}
bool File_DvbSubtitle::Demux_UnpacketizeContainer_Test()
{
if (Demux_Offset==0)
{
Demux_Offset=Buffer_Offset;
}
while (Demux_Offset<Buffer_Size)
{
bool MustBreak;
switch (Buffer[Demux_Offset])
{
case 0xFF :
MustBreak=true; break; //0xFF is not in the demuxed frame
default : MustBreak=false;
}
if (MustBreak)
break; //while() loop
if (Demux_Offset+6>Buffer_Size)
return false; //No complete frame
int16u segment_length=BigEndian2int16u(Buffer+Demux_Offset+4);
Demux_Offset+=6+segment_length;
if (Demux_Offset>=Buffer_Size)
return false; //No complete frame
}
if (Demux_Offset>=Buffer_Size)
return false; //No complete frame
Demux_UnpacketizeContainer_Demux();
Demux_TotalBytes++; //0xFF is not demuxed
return true;
}
//---------------------------------------------------------------------------
// Big Endian - float 16 bits
float32 BigEndian2float16(const char* Liste)
{
//sign 1 bit
//exponent 5 bit
//significand 10 bit
//Retrieving data
int16u Integer=BigEndian2int16u(Liste);
//Retrieving elements
bool Sign =(Integer&0x8000)?true:false;
int32u Exponent=(Integer>>10)&0xFF;
int32u Mantissa= Integer&0x03FF;
//Some computing
if (Exponent==0 || Exponent==0xFF)
return 0; //These are denormalised numbers, NANs, and other horrible things
Exponent-=0x0F; //Bias
float64 Answer=(((float64)Mantissa)/8388608+1.0)*std::pow((float64)2, (int)Exponent); //(1+Mantissa) * 2^Exponent
if (Sign)
Answer=-Answer;
return (float32)Answer;
}
//---------------------------------------------------------------------------
bool File_Dts::Synchronize()
{
//Synchronizing
while (Buffer_Offset+6<=Buffer_Size
&& !(BigEndian2int16u (Buffer+Buffer_Offset+0)==0x7FFE && BigEndian2int16u (Buffer+Buffer_Offset+2)==0x8001) //16 bits and big endian bitstream
&& !(LittleEndian2int16u(Buffer+Buffer_Offset+0)==0x7FFE && LittleEndian2int16u(Buffer+Buffer_Offset+2)==0x8001) //16 bits and little endian bitstream
&& !(BigEndian2int16u (Buffer+Buffer_Offset+0)==0x1FFF && BigEndian2int16u (Buffer+Buffer_Offset+2)==0xE800 && (BigEndian2int16u (Buffer+Buffer_Offset+4)&0xFFF0)==0x07F0) //14 bits and big endian bitstream
&& !(LittleEndian2int16u(Buffer+Buffer_Offset+0)==0x1FFF && LittleEndian2int16u(Buffer+Buffer_Offset+2)==0xE800 && (LittleEndian2int16u(Buffer+Buffer_Offset+4)&0xFFF0)==0x07F0) //14 bits and little endian bitstream
)
Buffer_Offset++;
if (Buffer_Offset+6>Buffer_Size)
{
//Parsing last bytes
if (Buffer_Offset+6==Buffer_Size)
{
if (CC4(Buffer+Buffer_Offset)!=0x7FFE8001) //For 6 bytes instead of 4 (14 bits)
{
Buffer_Offset++;
if (CC4(Buffer+Buffer_Offset)!=0x7FFE8001) //For 6 bytes instead of 4 (14 bits)
{
Buffer_Offset++;
if (CC4(Buffer+Buffer_Offset)!=0x7FFE8001)
{
Buffer_Offset++;
if (CC3(Buffer+Buffer_Offset)!=0x7FFE80)
{
Buffer_Offset++;
if (CC2(Buffer+Buffer_Offset)!=0x7FFE)
{
Buffer_Offset++;
if (CC1(Buffer+Buffer_Offset)!=0x7F)
Buffer_Offset++;
}
}
}
}
}
}
//Delay
if (Frame_Count==0)
Delay+=Buffer_Offset;
return false;
}
//Configuring and Delay
if (Frame_Count==0)
{
if (0) ;
else if (BigEndian2int16u (Buffer+Buffer_Offset)==0x7FFE) //16 bits and big endian bitstream
{
}
else if (LittleEndian2int16u(Buffer+Buffer_Offset)==0x7FFE) //16 bits and little endian bitstream
{
BigEndian=false;
}
else if (BigEndian2int16u (Buffer+Buffer_Offset)==0x1FFF) //14 bits and big endian bitstream
{
Word=false;
}
else if (LittleEndian2int16u(Buffer+Buffer_Offset)==0x1FFF) //14 bits and little endian bitstream
{
Word=false;
BigEndian=false;
}
SyncCode=CC4(Buffer+Buffer_Offset);
//14-bits and Little endian are not yet supported
if (!Word || !BigEndian)
{
Finnished();
return false;
}
//Delay
Delay+=Buffer_Offset;
}
//Synched is OK
Synched=true;
return true;
}
//---------------------------------------------------------------------------
void File_Tiff::GetValueOffsetu(ifditem &IfdItem)
{
ZtringList &Info=Infos[IfdItem.Tag]; Info.clear(); Info.Separator_Set(0, __T(" / "));
const char* Name=Tiff_Tag_Name(IfdItem.Tag);
if (IfdItem.Count>=10)
{
//Too many data, we don't currently need it and we skip it
Skip_XX(Element_Size-(Element_Offset+4), Name);
Info.clear();
return;
}
switch (IfdItem.Type)
{
case 1: /* 8-bit unsigned integer. */
for (int16u Pos=0; Pos<IfdItem.Count; Pos++)
{
int8u Ret8;
#if MEDIAINFO_TRACE
if (LittleEndian)
Get_L1 (Ret8, Name);
else
Get_B1 (Ret8, Name);
Element_Info1(Ztring::ToZtring(Ret8));
#else //MEDIAINFO_TRACE
if (Element_Offset+1>Element_Size)
{
Trusted_IsNot();
break;
}
if (LittleEndian)
Ret8=LittleEndian2int8u(Buffer+Buffer_Offset+(size_t)Element_Offset);
else
Ret8=BigEndian2int8u(Buffer+Buffer_Offset+(size_t)Element_Offset);
Element_Offset++;
#endif //MEDIAINFO_TRACE
Info.push_back(Ztring::ToZtring(Ret8));
}
break;
case 3: /* 16-bit (2-byte) unsigned integer. */
for (int16u Pos=0; Pos<IfdItem.Count; Pos++)
{
int16u Ret16;
#if MEDIAINFO_TRACE
if (LittleEndian)
Get_L2 (Ret16, Name);
else
Get_B2 (Ret16, Name);
switch (IfdItem.Tag)
{
case Tiff_Tag::Compression : Element_Info1(Tiff_Compression(Ret16)); break;
case Tiff_Tag::PhotometricInterpretation : Element_Info1(Tiff_PhotometricInterpretation(Ret16)); break;
default : Element_Info1(Ztring::ToZtring(Ret16));
}
#else //MEDIAINFO_TRACE
if (Element_Offset+2>Element_Size)
{
Trusted_IsNot();
break;
}
if (LittleEndian)
Ret16=LittleEndian2int16u(Buffer+Buffer_Offset+(size_t)Element_Offset);
else
Ret16=BigEndian2int16u(Buffer+Buffer_Offset+(size_t)Element_Offset);
Element_Offset+=2;
#endif //MEDIAINFO_TRACE
Info.push_back(Ztring::ToZtring(Ret16));
}
break;
case 4: /* 32-bit (4-byte) unsigned integer */
for (int16u Pos=0; Pos<IfdItem.Count; Pos++)
{
int32u Ret32;
#if MEDIAINFO_TRACE
if (LittleEndian)
Get_L4 (Ret32, Name);
else
Get_B4 (Ret32, Name);
Element_Info1(Ztring::ToZtring(Ret32));
#else //MEDIAINFO_TRACE
if (Element_Offset+4>Element_Size)
{
Trusted_IsNot();
break;
}
if (LittleEndian)
Ret32=LittleEndian2int32u(Buffer+Buffer_Offset+(size_t)Element_Offset);
else
Ret32=BigEndian2int32u(Buffer+Buffer_Offset+(size_t)Element_Offset);
Element_Offset+=4;
#endif //MEDIAINFO_TRACE
Info.push_back(Ztring::ToZtring(Ret32));
}
break;
default: //Unknown
{
if (LittleEndian)
Skip_L4( Name);
else
Skip_B4( Name);
Info.clear(); //We actually do not know the type
}
}
}
