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DTS Core IMAX detection as Commercial name
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@Roy-Funderburk
Roy-Funderburk committed Jul 13, 2023
1 parent 993216d commit b2f6d6b
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Showing 2 changed files with 162 additions and 4 deletions.
160 changes: 156 additions & 4 deletions Source/MediaInfo/Audio/File_Dts.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -488,6 +488,7 @@ enum extension
Ext_XCh,
Ext_XBR,
Ext_Aux,
Ext_Rev2Aux,
Ext_Max
};
static int32u DTS_Extension_Mapping[]=
Expand All @@ -501,6 +502,7 @@ static int32u DTS_Extension_Mapping[]=
0x5A5A5A5A,
0x655E315E,
0x9A1105A0,
0x7004C070,
};
static_assert(sizeof(DTS_Extension_Mapping)/sizeof(decltype(*DTS_Extension_Mapping))==Ext_Max, "");
static const char* DTS_Extension_Names[]=
Expand All @@ -514,6 +516,7 @@ static const char* DTS_Extension_Names[]=
"XCh (6.1 Channels)",
"XBR (Extended Bit Rate)",
"Aux",
"Rev2Aux",
};
static_assert(sizeof(DTS_Extension_Names)/sizeof(decltype(*DTS_Extension_Names))==Ext_Max, "");
static size_t DTS_Extension_Index_Get(int32u SyncWord)
Expand Down Expand Up @@ -572,6 +575,8 @@ File_Dts::File_Dts()
ExtendedCoding=false;
ES=false;
Core_Exists=false;
Rev2AuxPresent=false;
Type1CertifiedContent=false;
}

//***************************************************************************
Expand Down Expand Up @@ -884,6 +889,10 @@ void File_Dts::Streams_Fill()
if (Data[Profiles].size()==1 && Data[Profiles][0]==__T("Core"))
Data[Profiles].clear(); //Core is the default one

// IMAX in core-only stream
if (Type1CertifiedContent)
Fill(Stream_Audio, 0, Audio_Format_Commercial_IfAny, "DTS with T1-CC (IMAX Enhanced)");

// Filling
bool LegacyStreamDisplay=MediaInfoLib::Config.LegacyStreamDisplay_Get();
Fill(Stream_Audio, 0, Audio_Format_Profile, Data[Profiles].Read());
Expand Down Expand Up @@ -1529,7 +1538,6 @@ void File_Dts::Data_Parse()
Get_SB ( ES, "ES");
Skip_SB( "Front Sum/Difference");
Skip_SB( "Surrounds Sum/Difference");
Skip_S1( 4, "Dialog Normalisation Parameter");
switch (EncoderSoftwareRevision)
{
case 6 :
Expand All @@ -1542,7 +1550,50 @@ void File_Dts::Data_Parse()
Skip_S1( 4, "Unspecified");
break;
}

Element_Begin1("Primary Audio Coding Header");
int8u SubFrames, PrimaryChannels;
Get_S1( 4, SubFrames, "Number of Subframes");
SubFrames++;
Param_Info2(SubFrames, " Subframes");
Get_S1( 3, PrimaryChannels, "Number of Primary Audio Channels");
PrimaryChannels++;
Param_Info2(PrimaryChannels, " Channels");
Skip_S8(PrimaryChannels*5, "Subband Activity Count");
Skip_S8(PrimaryChannels*5, "High Frequency VQ Start Subband");
Skip_S8(PrimaryChannels*3, "Joint Intensity Coding Index");
Skip_S8(PrimaryChannels*2, "Transient Mode Code Book");
Skip_S8(PrimaryChannels*3, "Scale Factor Code Book");
Skip_S8(PrimaryChannels*3, "Bit Allocation Quantizer Select");

#if MEDIAINFO_TRACE
auto Trace_Activated_Sav=Trace_Activated;
Trace_Activated=false; // Hide trace for numerous ABIT selectors
#endif

int ABITBits=SkipABITSelector(PrimaryChannels, 1, 1);
for (int i=1; i<5; i++)
ABITBits+=SkipABITSelector(PrimaryChannels, 2, 3);
for (int i=5; i<10; i++)
ABITBits+=SkipABITSelector(PrimaryChannels, 3, 7);
Skip_BS(ABITBits, "Scale Factor Adjustment Indexes");

#if MEDIAINFO_TRACE
Trace_Activated=Trace_Activated_Sav;
#endif

if (crc_present)
Skip_S2(16, "Audio Header CRC Check Word");

Element_End0();

// SubSubFrameCount is needed for later parsing of Rev2AUXData
Get_S1( 2, SubSubFrameCount, "SubSubFrame Count");
SubSubFrameCount++;
Param_Info2(SubSubFrameCount, " frames");

BS_End();
Rev2AuxPresent=Rev2AuxProbe();
}

//PTS
Expand Down Expand Up @@ -1608,6 +1659,20 @@ void File_Dts::Data_Parse()
}
}

//---------------------------------------------------------------------------
int File_Dts::SkipABITSelector(int Channels, int BitCount, int Limit)
{
int ABITBits=0;
for (int Channel=0; Channel<Channels; Channel++)
{
int8u Bits;
Get_S1(BitCount, Bits, "Quantization Index Codebook Select");
if (Bits < Limit)
ABITBits+=2;
}
return ABITBits;
}

//***************************************************************************
// Elements
//***************************************************************************
Expand All @@ -1622,7 +1687,7 @@ void File_Dts::Core()
Presence.set(presence_Core_Core);

//Parsing
if (AuxiliaryData || ExtendedCoding)
if (AuxiliaryData || ExtendedCoding || Rev2AuxPresent)
{
Extensions_Resynch(true);
Asset_Sizes.push_back(Element_Size-Element_Offset);
Expand Down Expand Up @@ -1681,6 +1746,7 @@ void File_Dts::Extensions()
CASE(XCh);
CASE(XBR);
CASE(Aux);
CASE(Rev2Aux);
#undef CASE
default:
Extensions_Resynch(false);
Expand All @@ -1695,14 +1761,19 @@ void File_Dts::Extensions()

//Filling
FILLING_BEGIN();
if (Count_Get(Stream_Audio)==0 && Frame_Count>=Frame_Count_Valid)
if (!Status[IsAccepted] && Frame_Count>=2 && (Frame_Count>=Frame_Count_Valid || (Frame_Count_Valid && (File_Size-Buffer_TotalBytes_FirstSynched)/Frame_Count_Valid<Element_Size))) //2 frames mini in order to catch HD part. TODO: find a better way to accept stream in short files so with only few frames
{
Accept("DTS");
Fill("DTS");

//No more need data
if (!IsSub && Config->ParseSpeed<1.0)
Finish("DTS");
{
if (Stream_Offset_Max!=-1)
GoTo(Stream_Offset_Max);
else
Finish("DTS");
}
}
FILLING_END();

Expand Down Expand Up @@ -1772,6 +1843,9 @@ void File_Dts::Extensions_Resynch(bool Known)
case Ext_Aux:
IsNok=!AuxiliaryData;
break;
case Ext_Rev2Aux:
IsNok=!Rev2AuxPresent;
break;
default:
IsNok=true;
}
Expand Down Expand Up @@ -2297,6 +2371,84 @@ void File_Dts::XBR()
Extensions_Padding();
}

//---------------------------------------------------------------------------
void File_Dts::Rev2Aux()
{
// ETSI TS 102 114 v1.6.1 Section 5.8.3.
// The Rev2 Auxiliary Data Chunk Structure contains the T1CC indicator
// in the reserved data.
int8u Rev2Bytes;
Peek_B1(Rev2Bytes);
bool DmixIndexPresent=(Rev2Bytes&1)==1;
Rev2Bytes = (Rev2Bytes>>1)+1;
if (Element_Size-Element_Offset>=Rev2Bytes && Dts_CRC_CCIT_Compute(Buffer+Buffer_Offset+Element_Offset, Rev2Bytes)==0)
{
BS_Begin();
// Will later use Rev2BitsRemain to skip padding up to CRC
int Rev2BitsRemain=(Rev2Bytes-2)*8-Data_BS_Remain();

Skip_S1(7, "Rev2AUXDataByteSize");
bool ESMetaDataFlag;
Get_SB(ESMetaDataFlag, "ESMetaDataFlag");
if (ESMetaDataFlag)
Skip_S1(8, "EmbESDownMixScaleIndex");

bool BroadcastMetadataPresent = false;
Get_SB(BroadcastMetadataPresent, "BroadcastMetadataPresent");
if (BroadcastMetadataPresent)
{
bool DRCMetadataPresent, DialnormMetadataPresent;
Get_SB(DRCMetadataPresent, "DRCMetadataPresent");
Get_SB(DialnormMetadataPresent, "DialnormMetadata");
if (DRCMetadataPresent)
Skip_S1(4, "DRCversion_Rev2AUX");
auto Remain=Data_BS_Remain()%8;
if (Remain)
Skip_S1(Remain, "ByteAlign");
if (DRCMetadataPresent)
{
Element_Begin1("Rev2_DRCs");
for (int i=0; i<SubSubFrameCount; i++)
Skip_S1(8, "DRCCoeff_Rev2");
Element_End0();
}

if (DialnormMetadataPresent)
Skip_S1(5, "DIALNORM_rev2aux");
}

Rev2BitsRemain+=Data_BS_Remain();
if (Rev2BitsRemain >= 3)
{
Skip_S1(2, "NEOX Encoded Height Info");
bool T1CC;
Get_SB(Type1CertifiedContent, "Type 1 Certified Content");
Rev2BitsRemain-=3;
}
if (Rev2BitsRemain)
Skip_S4(Rev2BitsRemain, "ByteAlign");
BS_End();
Skip_B2( "Rev2AUXCRC16");
Skip_XX(Element_Size-Element_Offset, "Padding");
}
}

//---------------------------------------------------------------------------
bool File_Dts::Rev2AuxProbe() const
{
auto Base=Buffer+Buffer_Offset;
auto Offset=Element_Offset;
auto Offset_Max=Element_Size-3;
auto AlignmentBytes=Element_Offset%4;
if (AlignmentBytes)
Offset+=4-AlignmentBytes;

for (; Offset<Offset_Max; Offset+=4)
if (DTS_Extension_Index_Get(BigEndian2int32u(Base+Offset))==Ext_Rev2Aux)
return true;

return false;
}

//---------------------------------------------------------------------------
void File_Dts::Extensions2()
Expand Down
6 changes: 6 additions & 0 deletions Source/MediaInfo/Audio/File_Dts.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -82,8 +82,10 @@ private :
void XXCH();
void XBR();
void Aux() { Extensions_Resynch(true); }
void Rev2Aux();
void AfterAssets();
void Extensions2();
int SkipABITSelector(int Channels, int BitCount, int Limit);

//Buffer
bool FrameSynchPoint_Test();
Expand All @@ -110,13 +112,16 @@ private :
int8u HD_MaximumSampleRate_Real;
int8u HD_TotalNumberChannels;
int8u HD_ExSSFrameDurationCode;
int8u SubSubFrameCount;
bool AuxiliaryData;
bool ExtendedCoding;
bool Word;
bool BigEndian;
bool ES;
bool Core_Exists;
bool One2OneMapChannels2Speakers;
bool Rev2AuxPresent;
bool Type1CertifiedContent;
enum presence
{
presence_Core_Core,
Expand Down Expand Up @@ -161,6 +166,7 @@ private :

//Helpers
float64 BitRate_Get(bool WithHD=false);
bool Rev2AuxProbe() const;
void Streams_Fill_Extension();
void Streams_Fill_Core_ES();
void Streams_Fill_Core(bool With96k=false);
Expand Down

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