Add C++ runtime for spleeter about source separation (#2242)

sherpa-onnx/csrc/offline-source-separation-spleeter-model-config.cc

@@ -0,0 +1,54 @@
+// sherpa-onnx/csrc/offline-source-separation-spleeter_model-config.cc
+//
+// Copyright (c)  2025  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/offline-source-separation-spleeter-model-config.h"
+
+#include "sherpa-onnx/csrc/file-utils.h"
+#include "sherpa-onnx/csrc/macros.h"
+
+namespace sherpa_onnx {
+
+void OfflineSourceSeparationSpleeterModelConfig::Register(ParseOptions *po) {
+  po->Register("spleeter-vocals", &vocals, "Path to the spleeter vocals model");
+
+  po->Register("spleeter-accompaniment", &accompaniment,
+               "Path to the spleeter accompaniment model");
+}
+
+bool OfflineSourceSeparationSpleeterModelConfig::Validate() const {
+  if (vocals.empty()) {
+    SHERPA_ONNX_LOGE("Please provide --spleeter-vocals");
+    return false;
+  }
+
+  if (!FileExists(vocals)) {
+    SHERPA_ONNX_LOGE("spleeter vocals '%s' does not exist. ", vocals.c_str());
+    return false;
+  }
+
+  if (accompaniment.empty()) {
+    SHERPA_ONNX_LOGE("Please provide --spleeter-accompaniment");
+    return false;
+  }
+
+  if (!FileExists(accompaniment)) {
+    SHERPA_ONNX_LOGE("spleeter accompaniment '%s' does not exist. ",
+                     accompaniment.c_str());
+    return false;
+  }
+
+  return true;
+}
+
+std::string OfflineSourceSeparationSpleeterModelConfig::ToString() const {
+  std::ostringstream os;
+
+  os << "OfflineSourceSeparationSpleeterModelConfig(";
+  os << "vocals=\"" << vocals << "\", ";
+  os << "accompaniment=\"" << accompaniment << "\")";
+
+  return os.str();
+}
+
+}  // namespace sherpa_onnx