[onert] Support no branch multimodels nnpackage

[hseok-oh]

Support multimodel NN package with no branch

inputs -> model 1 -> model 2 -> ...  -> model N-1 -> model N -> outputs

input(s) -> model 1 input(s) model 1 output(s) -> model 2 input(s) ... model N-1 output(s) -> model N input(s) model N output(s) -> output(s)

Originally posted by @hseok-oh in https://github.com/Samsung/ONE/issues/9646#issuecomment-1233678141

[hseok-oh]

This is not scheduled issue yet

[hseok-oh]

Example nnpackage

three_tflites.tar.gz

metadata

{
  "major-version" : "1",
  "minor-version" : "3",
  "patch-version" : "0",
  "configs"       : [  ],
  "models"        : [ "mv1.0.tflite", "mv1.1.tflite", "mv1.2.tflite" ],
  "model-types"   : [ "tflite", "tflite", "tflite" ],
  "pkg-inputs"    : [ "0:0:0" ],
  "pkg-outputs"   : [ "2:0:0" ],
  "model-connect" : [ { "from" : "0:0:0", "to" : [ "1:0:0" ] }, { "from" : "1:0:0", "to" : [ "2:0:0" ] } ]
}

[hseok-oh]

More test case

three_tflites2.tar.gz

metadata

  "major-version" : "1",
  "minor-version" : "3",
  "patch-version" : "0",
  "configs"       : [  ],
  "models"        : [ "inception_v3.14to22.tflite", "inception_v3.23to32.tflite", "inception_v3.33to38.tflite" ],
  "model-types"   : [ "tflite", "tflite", "tflite" ],
  "pkg-inputs"    : [ "0:0:0", "0:0:1", "0:0:2", "0:0:3" ],
  "pkg-outputs"   : [ "2:0:0", "2:0:1", "2:0:2" ],
  "model-connect" : [ { "from" : "0:0:0", "to" : [ "1:0:0" ] }, { "from" : "0:0:1", "to" : [ "1:0:1" ] }, 
                      { "from" : "0:0:2", "to" : [ "1:0:2" ] }, { "from" : "0:0:3", "to" : [ "1:0:3" ] }, 
                      { "from" : "1:0:0", "to" : [ "2:0:0" ] }, { "from" : "1:0:1", "to" : [ "2:0:1" ] },
                      { "from" : "1:0:2", "to" : [ "2:0:2" ] }, { "from" : "1:0:3", "to" : [ "2:0:3" ] } ]
}

[hseok-oh]

Done