enc: add placeholder EncoderAttributeParams

This placeholder is for any encoder-specific per-attribute parameters
that do not belong in the SPS, APS, etc.,

tmc3/PCCTMC3Encoder.h

@@ -64,6 +64,10 @@ enum class PartitionMethod
 
 //============================================================================
 
+struct EncoderAttributeParams {};
+
+//----------------------------------------------------------------------------
+
 struct EncoderParams {
   SequenceParameterSet sps;
   GeometryParameterSet gps;
@@ -72,6 +76,9 @@ struct EncoderParams {
   //  => The SPS enumerates the attributes, the APS controls coding params.
   std::vector<AttributeParameterSet> aps;
 
+  // Encoder specific parameters for attributes
+  std::vector<EncoderAttributeParams> attr;
+
   // todo(df): this should go away
   std::map<std::string, int> attributeIdxMap;
 

tmc3/TMC3.cpp

@@ -204,6 +204,7 @@ ParseParameters(int argc, char* argv[], Parameters& params)
   struct {
     AttributeDescription desc;
     AttributeParameterSet aps;
+    EncoderAttributeParams encoder;
   } params_attr;
 
   bool print_help = false;
@@ -227,12 +228,14 @@ ParseParameters(int argc, char* argv[], Parameters& params)
       if (it.second) {
         params.encoder.sps.attributeSets.push_back(params_attr.desc);
         params.encoder.aps.push_back(params_attr.aps);
+        params.encoder.attr.push_back(params_attr.encoder);
         return;
       }
 
       // update existing entry
       params.encoder.sps.attributeSets[it.first->second] = params_attr.desc;
       params.encoder.aps[it.first->second] = params_attr.aps;
+      params.encoder.attr[it.first->second] = params_attr.encoder;
     };
 
   /* clang-format off */
@@ -704,6 +707,7 @@ ParseParameters(int argc, char* argv[], Parameters& params)
       // NB: when dumping the config, opts references params_attr
       params_attr.desc = params.encoder.sps.attributeSets[it.second];
       params_attr.aps = params.encoder.aps[it.second];
+      params_attr.encoder = params.encoder.attr[it.second];
       cout << "    " << it.first << "\n";
       po::dumpCfg(cout, opts, "Attributes", 8);
     }