Data/Model: Support flexible tensors in filter description

This patch supports flexible tensors in filter description.

Signed-off-by: Yelin Jeong <[email protected]>

ml_inference_offloading/src/main/java/ai/nnstreamer/ml/inference/offloading/data/Model.kt

@@ -32,7 +32,7 @@ data class Model(
         uid: Int,
         name: String,
         jsonObject: JSONObject = JSONObject(),
-        optionalJsonObject: JSONObject = JSONObject()
+        optionalJsonObject: JSONObject = JSONObject(),
     ) : this(uid, name) {
         // TODO: The following is the parser for "single", which is a legacy conf
         runCatching {
@@ -66,7 +66,8 @@ data class Model(
             runCatching {
                 val infoMap = mutableMapOf<String, MutableList<String>>(
                     "type" to mutableListOf(),
-                    "dimension" to mutableListOf()
+                    "dimension" to mutableListOf(),
+                    "format" to mutableListOf()
                 )
 
                 val info = jsonObject.getJSONArray(prop)
@@ -113,6 +114,44 @@ data class Model(
 
     var optionalInfo: Map<String, String> = mapOf()
 
+    private fun getFormat(list: List<String>): String {
+        return list.let {
+            if (it.isNotEmpty()) {
+                it.joinToString(",")
+            } else {
+                "static"
+            }
+        }
+    }
+
+    private fun getTensors(list: List<String>?, format: String): String {
+        return if (format == "static") {
+            val numTensors = list?.size ?: 1
+            ",num_tensors=$numTensors"
+        } else {
+            ""
+        }
+    }
+
+    private fun getType(list: List<String>): String {
+        val filtered = list.filterNot{ it.isEmpty() or it.isBlank() }
+        return if (filtered.isEmpty()) {
+            ""
+        } else {
+            ",types=${filtered.joinToString(",")}"
+        }
+    }
+
+    private fun getDimension(list: List<String>): String {
+        return list.let {
+            if (it.isNotEmpty()) {
+                ",dimensions=(string)${it.joinToString(",")}"
+            } else {
+                ""
+            }
+        }
+    }
+
     /**
      * Get NNS filter description string for the given model. This is used to create a new NNS pipeline instance.
      * @return NNS filter description string. It includes paths of the model files and other information.
@@ -125,22 +164,23 @@ data class Model(
                 transform = { basePath?.resolve(it).toString() }
             )
         }
-        val inTypes = inputInfo["type"]?.let {
-            "types=${inputInfo["type"]?.joinToString(",")}"
-        } ?: ""
-        val inDims = inputInfo["dimension"]?.let {
-            "dimensions=(string)${inputInfo["dimension"]?.joinToString(",")}"
-        } ?: ""
-        val outTypes = outputInfo["type"]?.let {
-            "types=${outputInfo["type"]?.joinToString(",")}"
-        } ?: ""
-        val outDims = outputInfo["dimension"]?.let {
-            "dimensions=(string)${outputInfo["dimension"]?.joinToString(",")}"
-        } ?: ""
+
+        val inFormat = inputInfo["format"]?.let { getFormat(it) } ?: "static"
+        val outFormat = outputInfo["format"]?.let { getFormat(it) } ?: "static"
+
+        val inTensors = getTensors(inputInfo["type"], inFormat)
+        val outTensors = getTensors(outputInfo["type"], inFormat)
+
+        val inTypes = inputInfo["type"]?.let { getType(it) } ?: ""
+        val outTypes = outputInfo["type"]?.let { getType(it) } ?: ""
+
+        val inDims = inputInfo["dimension"]?.let { getDimension(it) } ?: ""
+        val outDims = outputInfo["dimension"]?.let { getDimension(it) } ?: ""
+
         val filter =
-            "other/tensors,num_tensors=${inputInfo["type"]?.size ?: 1},format=static,${inDims},${inTypes},framerate=0/1 ! " +
+            "other/tensors,format=${inFormat}${inTensors}${inDims}${inTypes},framerate=0/1 ! " +
                     "tensor_filter framework=tensorflow-lite model=${modelPaths} ! " +
-                    "other/tensors,num_tensors=${outputInfo["type"]?.size ?: 1},format=static,${outDims},${outTypes},framerate=0/1"
+                    "other/tensors,format=${outFormat}${outTensors}${outDims}${outTypes},framerate=0/1"
 
         return filter
     }