Add runtime support for wespeaker models (#516)

sherpa-onnx/csrc/speaker-embedding-extractor-impl.h

@@ -0,0 +1,34 @@
+// sherpa-onnx/csrc/speaker-embedding-extractor-impl.h
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#ifndef SHERPA_ONNX_CSRC_SPEAKER_EMBEDDING_EXTRACTOR_IMPL_H_
+#define SHERPA_ONNX_CSRC_SPEAKER_EMBEDDING_EXTRACTOR_IMPL_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "sherpa-onnx/csrc/speaker-embedding-extractor.h"
+
+namespace sherpa_onnx {
+
+class SpeakerEmbeddingExtractorImpl {
+ public:
+  virtual ~SpeakerEmbeddingExtractorImpl() = default;
+
+  static std::unique_ptr<SpeakerEmbeddingExtractorImpl> Create(
+      const SpeakerEmbeddingExtractorConfig &config);
+
+  virtual int32_t Dim() const = 0;
+
+  virtual std::unique_ptr<OnlineStream> CreateStream() const = 0;
+
+  virtual bool IsReady(OnlineStream *s) const = 0;
+
+  virtual std::vector<float> Compute(OnlineStream *s) const = 0;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_SPEAKER_EMBEDDING_EXTRACTOR_IMPL_H_