JVET-O0438: affine AMVR control flag conditioned on affine control flag in SPS

source/Lib/CommonLib/TypeDef.h

@@ -50,6 +50,8 @@
 #include <assert.h>
 #include <cassert>
 
+#define JVET_O0438_SPS_AFFINE_AMVR_FLAG                   1 // JVET-O0438: affine AMVR control flag conditioned on affine control flag in SPS
+
 #define JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT      1 // JVET-O0052 Method-1: TU-level context coded bin constraint
 
 #define JVET_O0105_ICT                                    1 // JVET-O0105: inter-chroma transform (ICT) as extension of joint chroma coding (JCC)

source/Lib/DecoderLib/VLCReader.cpp

@@ -1216,9 +1216,9 @@ void HLSyntaxReader::parseSPS(SPS* pcSPS)
   READ_FLAG( uiCode,  "sps_amvr_enabled_flag" );                     pcSPS->setAMVREnabledFlag ( uiCode != 0 );
 
   READ_FLAG( uiCode, "sps_bdof_enabled_flag" );                      pcSPS->setBDOFEnabledFlag ( uiCode != 0 );
-
+#if !JVET_O0438_SPS_AFFINE_AMVR_FLAG
   READ_FLAG( uiCode,  "sps_affine_amvr_enabled_flag" );             pcSPS->setAffineAmvrEnabledFlag ( uiCode != 0 );
-
+#endif
   READ_FLAG(uiCode, "sps_dmvr_enable_flag");                        pcSPS->setUseDMVR(uiCode != 0);
   READ_FLAG(uiCode, "sps_mmvd_enable_flag");                        pcSPS->setUseMMVD(uiCode != 0);
   // KJS: sps_cclm_enabled_flag
@@ -1241,6 +1241,9 @@ void HLSyntaxReader::parseSPS(SPS* pcSPS)
   if ( pcSPS->getUseAffine() )
   {
     READ_FLAG( uiCode,  "affine_type_flag" );                       pcSPS->setUseAffineType          ( uiCode != 0 );
+#if JVET_O0438_SPS_AFFINE_AMVR_FLAG
+    READ_FLAG( uiCode,  "sps_affine_amvr_enabled_flag" );           pcSPS->setAffineAmvrEnabledFlag  ( uiCode != 0 );
+#endif
   }
   READ_FLAG( uiCode,    "gbi_flag" );                               pcSPS->setUseGBi                 ( uiCode != 0 );
   READ_FLAG(uiCode, "ibc_flag");                                    pcSPS->setIBCFlag(uiCode);

source/Lib/EncoderLib/VLCWriter.cpp

@@ -809,9 +809,9 @@ void HLSWriter::codeSPS( const SPS* pcSPS )
   WRITE_FLAG( pcSPS->getAMVREnabledFlag() ? 1 : 0,                                   "sps_amvr_enabled_flag" );
 
   WRITE_FLAG( pcSPS->getBDOFEnabledFlag() ? 1 : 0,                                   "sps_bdof_enabled_flag" );
-
+#if !JVET_O0438_SPS_AFFINE_AMVR_FLAG
   WRITE_FLAG( pcSPS->getAffineAmvrEnabledFlag() ? 1 : 0,                             "sps_affine_amvr_enabled_flag" );
-
+#endif
   WRITE_FLAG( pcSPS->getUseDMVR() ? 1 : 0,                                            "sps_dmvr_enable_flag" );
   WRITE_FLAG(pcSPS->getUseMMVD() ? 1 : 0,                                             "sps_mmvd_enable_flag");
   // KJS: sps_cclm_enabled_flag
@@ -834,6 +834,9 @@ void HLSWriter::codeSPS( const SPS* pcSPS )
   if ( pcSPS->getUseAffine() )
   {
     WRITE_FLAG( pcSPS->getUseAffineType() ? 1 : 0,                                             "affine_type_flag" );
+#if JVET_O0438_SPS_AFFINE_AMVR_FLAG
+    WRITE_FLAG( pcSPS->getAffineAmvrEnabledFlag() ? 1 : 0,                                     "sps_affine_amvr_enabled_flag" );
+#endif
   }
   WRITE_FLAG( pcSPS->getUseGBi() ? 1 : 0,                                                      "gbi_flag" );
   WRITE_FLAG(pcSPS->getIBCFlag() ? 1 : 0,                                                      "ibc_flag");