Support spoken language identification with whisper (#694)

sherpa-onnx/csrc/spoken-language-identification-impl.h

@@ -0,0 +1,28 @@
+// sherpa-onnx/csrc/spoken-language-identification-impl.h
+//
+// Copyright (c)  2024  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_SPOKEN_LANGUAGE_IDENTIFICATION_IMPL_H_
+#define SHERPA_ONNX_CSRC_SPOKEN_LANGUAGE_IDENTIFICATION_IMPL_H_
+
+#include <memory>
+#include <string>
+
+#include "sherpa-onnx/csrc/spoken-language-identification.h"
+
+namespace sherpa_onnx {
+
+class SpokenLanguageIdentificationImpl {
+ public:
+  virtual ~SpokenLanguageIdentificationImpl() = default;
+
+  static std::unique_ptr<SpokenLanguageIdentificationImpl> Create(
+      const SpokenLanguageIdentificationConfig &config);
+
+  virtual std::unique_ptr<OfflineStream> CreateStream() const = 0;
+
+  virtual std::string Compute(OfflineStream *s) const = 0;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_SPOKEN_LANGUAGE_IDENTIFICATION_IMPL_H_