diff --git a/doc/software-manual.tex b/doc/software-manual.tex
index 27957a7f0e56384f4af6ea5f488d0fcd8ef38805..a2d25b91f5fe6e0c91e06aa45a831f50fafae1b0 100644
--- a/doc/software-manual.tex
+++ b/doc/software-manual.tex
@@ -983,6 +983,12 @@ Valid values are: main, high.
NB: There is currently only limited validation that the encoder configuration complies with the profile, level and tier constraints.
\\
+\Option{SubProfile} &
+%\ShortOption{\None} &
+\Default{0} &
+Indicates interoperability metadata registered as specified by X Recommendation ITU-T T.35.
+\\
+
\Option{EnableDecodingParameterSet} &
%\ShortOption{\None} &
\Default{false} &
diff --git a/source/App/EncoderApp/EncApp.cpp b/source/App/EncoderApp/EncApp.cpp
index 0ef3310865a86ae215863d183910d5eee5250e03..bfa865126b19d44bfe7cca8ba29aed7e41639f45 100644
--- a/source/App/EncoderApp/EncApp.cpp
+++ b/source/App/EncoderApp/EncApp.cpp
@@ -88,6 +88,9 @@ void EncApp::xInitLibCfg()
#endif
m_cEncLib.setProfile ( m_profile);
m_cEncLib.setLevel ( m_levelTier, m_level);
+#if JVET_N0276_CONSTRAINT_FLAGS
+ m_cEncLib.setSubProfile ( m_subProfile );
+#endif
m_cEncLib.setProgressiveSourceFlag ( m_progressiveSourceFlag);
m_cEncLib.setInterlacedSourceFlag ( m_interlacedSourceFlag);
m_cEncLib.setNonPackedConstraintFlag ( m_nonPackedConstraintFlag);
diff --git a/source/App/EncoderApp/EncAppCfg.cpp b/source/App/EncoderApp/EncAppCfg.cpp
index d2e1baac1dd70fd217d1ce9563c0ab2e9597a34d..ccfd68e262db1f5bf3fe934673371257d0fcb05e 100644
--- a/source/App/EncoderApp/EncAppCfg.cpp
+++ b/source/App/EncoderApp/EncAppCfg.cpp
@@ -861,6 +861,9 @@ bool EncAppCfg::parseCfg( int argc, char* argv[] )
("Profile", extendedProfile, NONE, "Profile name to use for encoding. Use main (for main), main10 (for main10), main-still-picture, main-RExt (for Range Extensions profile), any of the RExt specific profile names, or none")
("Level", m_level, Level::NONE, "Level limit to be used, eg 5.1, or none")
("Tier", m_levelTier, Level::MAIN, "Tier to use for interpretation of --Level (main or high only)")
+#if JVET_N0276_CONSTRAINT_FLAGS
+ ("SubProfile", m_subProfile, 0u, "Sub-profile idc")
+#endif
("EnableDecodingParameterSet", m_decodingParameterSetEnabled, false, "Enables writing of Decoding Parameter Set")
("MaxBitDepthConstraint", m_bitDepthConstraint, 0u, "Bit depth to use for profile-constraint for RExt profiles. 0=automatically choose based upon other parameters")
("MaxChromaFormatConstraint", tmpConstraintChromaFormat, 0, "Chroma-format to use for the profile-constraint for RExt profiles. 0=automatically choose based upon other parameters")
diff --git a/source/App/EncoderApp/EncAppCfg.h b/source/App/EncoderApp/EncAppCfg.h
index ca9e4ebd1be65fec61c3395a6212c200df551aa9..3845bb4c05440556c62bb050abb9c27bb6683e41 100644
--- a/source/App/EncoderApp/EncAppCfg.h
+++ b/source/App/EncoderApp/EncAppCfg.h
@@ -166,6 +166,9 @@ protected:
Profile::Name m_profile;
Level::Tier m_levelTier;
Level::Name m_level;
+#if JVET_N0276_CONSTRAINT_FLAGS
+ uint32_t m_subProfile;
+#endif
uint32_t m_bitDepthConstraint;
ChromaFormat m_chromaFormatConstraint;
bool m_intraConstraintFlag;
diff --git a/source/Lib/CommonLib/Slice.cpp b/source/Lib/CommonLib/Slice.cpp
index e043b54ecd58773b6d3782937bab6ad337a1993e..503a0780b59dca5def1e0938b8b0b223627b33f5 100644
--- a/source/Lib/CommonLib/Slice.cpp
+++ b/source/Lib/CommonLib/Slice.cpp
@@ -2752,6 +2752,9 @@ ProfileTierLevel::ProfileTierLevel()
: m_profileSpace (0)
, m_tierFlag (Level::MAIN)
, m_profileIdc (Profile::NONE)
+#if JVET_N0276_CONSTRAINT_FLAGS
+ , m_subProfileIdc (0)
+#endif
, m_levelIdc (Level::NONE)
, m_progressiveSourceFlag (false)
, m_interlacedSourceFlag (false)
@@ -2770,6 +2773,9 @@ PTL::PTL()
ProfileTierLevel::ProfileTierLevel()
: m_tierFlag (Level::MAIN)
, m_profileIdc (Profile::NONE)
+#if JVET_N0276_CONSTRAINT_FLAGS
+ , m_subProfileIdc (0)
+#endif
, m_levelIdc (Level::NONE)
{
::memset(m_subLayerLevelPresentFlag, 0, sizeof(m_subLayerLevelPresentFlag ));
diff --git a/source/Lib/CommonLib/Slice.h b/source/Lib/CommonLib/Slice.h
index dbf268b56f67fac12c370887bc8eb2304e1b6794..978d223b47d0f309071d6229e348634ada421306 100644
--- a/source/Lib/CommonLib/Slice.h
+++ b/source/Lib/CommonLib/Slice.h
@@ -402,6 +402,9 @@ class ProfileTierLevel
Profile::Name m_profileIdc;
#if !JVET_M0101_HLS
bool m_profileCompatibilityFlag[32];
+#endif
+#if JVET_N0276_CONSTRAINT_FLAGS
+ uint32_t m_subProfileIdc;
#endif
Level::Name m_levelIdc;
@@ -434,6 +437,11 @@ public:
Profile::Name getProfileIdc() const { return m_profileIdc; }
void setProfileIdc(Profile::Name x) { m_profileIdc = x; }
+#if JVET_N0276_CONSTRAINT_FLAGS
+ uint32_t getSubProfileIdc() const { return m_subProfileIdc; }
+ void setSubProfileIdc(uint32_t x) { m_subProfileIdc = x; }
+#endif
+
#if !JVET_M0101_HLS
bool getProfileCompatibilityFlag(int i) const { return m_profileCompatibilityFlag[i]; }
void setProfileCompatibilityFlag(int i, bool x) { m_profileCompatibilityFlag[i] = x; }
diff --git a/source/Lib/DecoderLib/VLCReader.cpp b/source/Lib/DecoderLib/VLCReader.cpp
index bf9f0828927165ba5d6510754b4f09d10f2da56a..b4c43fb889135319426a28701a04223b9fe05fc4 100644
--- a/source/Lib/DecoderLib/VLCReader.cpp
+++ b/source/Lib/DecoderLib/VLCReader.cpp
@@ -2557,6 +2557,9 @@ void HLSyntaxReader::parseProfileTierLevel(ProfileTierLevel *ptl, int maxNumSubL
uint32_t symbol;
READ_CODE(7 , symbol, "general_profile_idc" ); ptl->setProfileIdc (Profile::Name(symbol));
READ_FLAG( symbol, "general_tier_flag" ); ptl->setTierFlag (symbol ? Level::HIGH : Level::MAIN);
+#if JVET_N0276_CONSTRAINT_FLAGS
+ READ_CODE(24 , symbol, "general_sub_profile_idc" ); ptl->setSubProfileIdc (symbol);
+#endif
parseConstraintInfo( ptl->getConstraintInfo() );
diff --git a/source/Lib/EncoderLib/EncCfg.h b/source/Lib/EncoderLib/EncCfg.h
index 1274fb042ae081b7fd0adfae40ab648f4195cb08..68134e2c6b79f763b43e15e8fcbcc05137b9490f 100644
--- a/source/Lib/EncoderLib/EncCfg.h
+++ b/source/Lib/EncoderLib/EncCfg.h
@@ -208,6 +208,9 @@ protected:
Profile::Name m_profile;
Level::Tier m_levelTier;
Level::Name m_level;
+#if JVET_N0276_CONSTRAINT_FLAGS
+ uint32_t m_subProfile;
+#endif
bool m_progressiveSourceFlag;
bool m_interlacedSourceFlag;
bool m_nonPackedConstraintFlag;
@@ -704,6 +707,9 @@ public:
void setProfile(Profile::Name profile) { m_profile = profile; }
void setLevel(Level::Tier tier, Level::Name level) { m_levelTier = tier; m_level = level; }
+#if JVET_N0276_CONSTRAINT_FLAGS
+ void setSubProfile(uint32_t subProfile) { m_subProfile = subProfile; }
+#endif
bool getIntraOnlyConstraintFlag() const { return m_bIntraOnlyConstraintFlag; }
void setIntraOnlyConstraintFlag(bool bVal) { m_bIntraOnlyConstraintFlag = bVal; }
diff --git a/source/Lib/EncoderLib/EncLib.cpp b/source/Lib/EncoderLib/EncLib.cpp
index 2b1f406550c3f97f4768b34ea26547a06947827e..4dea49e55d644dda6fb8b4a7ba04962bf781dc6a 100644
--- a/source/Lib/EncoderLib/EncLib.cpp
+++ b/source/Lib/EncoderLib/EncLib.cpp
@@ -951,6 +951,9 @@ void EncLib::xInitSPS(SPS &sps)
profileTierLevel.setLevelIdc (m_level);
profileTierLevel.setTierFlag (m_levelTier);
profileTierLevel.setProfileIdc (m_profile);
+#if JVET_N0276_CONSTRAINT_FLAGS
+ profileTierLevel.setSubProfileIdc (m_subProfile);
+#endif
profileTierLevel.setProfileCompatibilityFlag (m_profile, 1);
profileTierLevel.setProgressiveSourceFlag (m_progressiveSourceFlag);
profileTierLevel.setInterlacedSourceFlag (m_interlacedSourceFlag);
@@ -1026,6 +1029,9 @@ void EncLib::xInitSPS(SPS &sps)
profileTierLevel->setLevelIdc (m_level);
profileTierLevel->setTierFlag (m_levelTier);
profileTierLevel->setProfileIdc (m_profile);
+#if JVET_N0276_CONSTRAINT_FLAGS
+ profileTierLevel->setSubProfileIdc (m_subProfile);
+#endif
#endif
/* XXX: should Main be marked as compatible with still picture? */
diff --git a/source/Lib/EncoderLib/VLCWriter.cpp b/source/Lib/EncoderLib/VLCWriter.cpp
index 94a3729fa3e929f70f94bd93b39991d8800d2284..b57fbc86cfa7a58c79f31c805b2ffe77ebd5c418 100644
--- a/source/Lib/EncoderLib/VLCWriter.cpp
+++ b/source/Lib/EncoderLib/VLCWriter.cpp
@@ -1813,6 +1813,9 @@ void HLSWriter::codeProfileTierLevel ( const ProfileTierLevel* ptl, int maxN
{
WRITE_CODE( int(ptl->getProfileIdc()), 7 , "general_profile_idc" );
WRITE_FLAG( ptl->getTierFlag()==Level::HIGH, "general_tier_flag" );
+#if JVET_N0276_CONSTRAINT_FLAGS
+ WRITE_CODE( ptl->getSubProfileIdc(), 24, "general_sub_profile_idc" );
+#endif
codeConstraintInfo(ptl->getConstraintInfo());
@@ -1884,6 +1887,7 @@ void HLSWriter::codeProfileTier( const ProfileTierLevel* ptl, const bool /*bIsSu
{
WRITE_CODE( ptl->getProfileSpace(), 2 , PTL_TRACE_TEXT("profile_space" ));
WRITE_FLAG( ptl->getTierFlag()==Level::HIGH, PTL_TRACE_TEXT("tier_flag" ));
+
WRITE_CODE( int(ptl->getProfileIdc()), 5 , PTL_TRACE_TEXT("profile_idc" ));
for(int j = 0; j < 32; j++)
{