Support whisper models (#238)

sherpa-onnx/csrc/offline-whisper-greedy-search-decoder.h

@@ -0,0 +1,29 @@
+// sherpa-onnx/csrc/offline-whisper-greedy-search-decoder.h
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#ifndef SHERPA_ONNX_CSRC_OFFLINE_WHISPER_GREEDY_SEARCH_DECODER_H_
+#define SHERPA_ONNX_CSRC_OFFLINE_WHISPER_GREEDY_SEARCH_DECODER_H_
+
+#include <vector>
+
+#include "sherpa-onnx/csrc/offline-whisper-decoder.h"
+#include "sherpa-onnx/csrc/offline-whisper-model.h"
+
+namespace sherpa_onnx {
+
+class OfflineWhisperGreedySearchDecoder : public OfflineWhisperDecoder {
+ public:
+  explicit OfflineWhisperGreedySearchDecoder(OfflineWhisperModel *model)
+      : model_(model) {}
+
+  std::vector<OfflineWhisperDecoderResult> Decode(Ort::Value cross_k,
+                                                  Ort::Value cross_v) override;
+
+ private:
+  OfflineWhisperModel *model_;  // not owned
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_OFFLINE_WHISPER_GREEDY_SEARCH_DECODER_H_