//---------------------------------------------------------------------------
bool File_ScreamTracker3::FileHeader_Begin()
{
//Element_Size
if (Buffer_Size<44)
return false; //Must wait for more data
if (CC1(Buffer+28)!=0x1A || CC4(Buffer+44)!=0x5343524D) //"SCRM"
{
Reject("Scream Tracker 3");
return false;
}
//All should be OK...
return true;
}
//---------------------------------------------------------------------------
bool File_Dirac::Synchronize()
{
//Synchronizing
while (Buffer_Offset+5<=Buffer_Size
&& CC4(Buffer+Buffer_Offset)!=0x42424344) //"BBCD"
Buffer_Offset++;
if (Buffer_Offset+5>Buffer_Size)
{
//Parsing last bytes
if (Buffer_Offset+4==Buffer_Size)
{
if (CC4(Buffer+Buffer_Offset)!=0x42424344)
{
Buffer_Offset++;
if (CC3(Buffer+Buffer_Offset)!=0x424243)
{
Buffer_Offset++;
if (CC2(Buffer+Buffer_Offset)!=0x4242)
{
Buffer_Offset++;
if (CC1(Buffer+Buffer_Offset)!=0x42)
Buffer_Offset++;
}
}
}
}
return false;
}
//Synched is OK
Synched=true;
if (Streams.empty())
{
//Count of a Packets
Frame_Count=0;
//Temp
Dirac_base_video_format((int32u)-1, frame_width, frame_height, chroma_format, source_sampling,
clean_width, clean_height, clean_left_offset, clean_top_offset,
frame_rate, pixel_aspect_ratio);
//Default stream values
Streams.resize(0x100);
Streams[0x00].Searching_Payload=true; //Sequence header
}
return true;
}
//---------------------------------------------------------------------------
bool File_Mpc::FileHeader_Begin()
{
//Tags
if (!File__Tags_Helper::FileHeader_Begin())
return false;
if (Buffer_Offset+4>Buffer_Size)
return false;
//Test
if (CC3(Buffer)!=0x4D502B || (CC1(Buffer+3)&0x0F)!=7) //"MP+" version 7
{
File__Tags_Helper::Reject("Musepack SV7");
return false;
}
return true;
}
//---------------------------------------------------------------------------
bool File_Dirac::Header_Parser_QuickSearch()
{
while ( Buffer_Offset+13<=Buffer_Size
&& CC4(Buffer+Buffer_Offset)==0x42424344) //"BBCD"
{
//Getting start_code
int8u start_code=CC1(Buffer+Buffer_Offset+4);
//Searching start
if (Streams[start_code].Searching_Payload)
return true;
//Getting size
Buffer_Offset+=BigEndian2int32u(Buffer+Buffer_Offset+5);
}
if (Buffer_Offset+13<=Buffer_Size)
Trusted_IsNot("Dirac, Synchronisation lost");
Synched=false;
return Synchronize();
}
//---------------------------------------------------------------------------
bool File_Dirac::Synchronize()
{
//Synchronizing
while (Buffer_Offset+5<=Buffer_Size
&& CC4(Buffer+Buffer_Offset)!=0x42424344) //"BBCD"
Buffer_Offset++;
//Parsing last bytes if needed
if (Buffer_Offset+5>Buffer_Size)
{
if (Buffer_Offset+4==Buffer_Size && CC4(Buffer+Buffer_Offset)!=0x42424344) //"BBCD"
Buffer_Offset++;
if (Buffer_Offset+3==Buffer_Size && CC3(Buffer+Buffer_Offset)!=0x424243) //"BBC"
Buffer_Offset++;
if (Buffer_Offset+2==Buffer_Size && CC2(Buffer+Buffer_Offset)!=0x4242) //"BB"
Buffer_Offset++;
if (Buffer_Offset+1==Buffer_Size && CC1(Buffer+Buffer_Offset)!=0x42) //"B"
Buffer_Offset++;
return false;
}
//Synched is OK
return true;
}
//---------------------------------------------------------------------------
bool File_Wvpk::Synchronize()
{
//Specific case
if (FromMKV)
return true;
//Tags
bool Tag_Found;
if (!File__Tags_Helper::Synchronize(Tag_Found))
return false;
if (Tag_Found)
return true;
//Synchronizing
while (Buffer_Offset+8<=Buffer_Size)
{
while (Buffer_Offset+8<=Buffer_Size
&& CC4(Buffer+Buffer_Offset)!=CC4("wvpk"))
{
Buffer_Offset++;
}
if (Buffer_Offset+8<=Buffer_Size)//Testing if size is coherant
{
//Testing next start, to be sure
size_t Size=LittleEndian2int32u(Buffer+Buffer_Offset+4)+8;
if (1)//File_Offset+Buffer_Offset+Size!=File_Size-File_EndTagSize)
{
if (Buffer_Offset+Size+8>Buffer_Size)
return false; //Need more data
//Testing
if (CC4(Buffer+Buffer_Offset+Size)!=CC4("wvpk"))
Buffer_Offset++;
else
break; //while()
}
else
Buffer_Offset++;
}
}
//Parsing last bytes if needed
if (Buffer_Offset+8>Buffer_Size)
{
if (Buffer_Offset+7==Buffer_Size && CC4(Buffer+Buffer_Offset)!=0x7776706B) //"wvpk"
Buffer_Offset++;
if (Buffer_Offset+6==Buffer_Size && CC4(Buffer+Buffer_Offset)!=0x7776706B) //"wvpk"
Buffer_Offset++;
if (Buffer_Offset+5==Buffer_Size && CC4(Buffer+Buffer_Offset)!=0x7776706B) //"wvpk"
Buffer_Offset++;
if (Buffer_Offset+4==Buffer_Size && CC4(Buffer+Buffer_Offset)!=0x7776706B) //"wvpk"
Buffer_Offset++;
if (Buffer_Offset+3==Buffer_Size && CC3(Buffer+Buffer_Offset)!=0x777670) //"wv"
Buffer_Offset++;
if (Buffer_Offset+2==Buffer_Size && CC2(Buffer+Buffer_Offset)!=0x7776) //"wv"
Buffer_Offset++;
if (Buffer_Offset+1==Buffer_Size && CC1(Buffer+Buffer_Offset)!=0x77) //"w"
Buffer_Offset++;
return false;
}
//Synched is OK
return true;
}
//---------------------------------------------------------------------------
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;
}
