Refactor the code (#15)

* code refactoring

* Remove reference files

* Update README and CI

* small fixes

* fix style issues

* add style check for CI

* fix style issues

* remove kaldi-native-io

sherpa-onnx/csrc/decode.h

@@ -0,0 +1,40 @@
+/**
+ * Copyright (c)  2022  Xiaomi Corporation (authors: Fangjun Kuang)
+ *
+ * See LICENSE for clarification regarding multiple authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SHERPA_ONNX_CSRC_DECODE_H_
+#define SHERPA_ONNX_CSRC_DECODE_H_
+
+#include <vector>
+
+#include "sherpa-onnx/csrc/rnnt-model.h"
+
+namespace sherpa_onnx {
+
+/** Greedy search for non-streaming ASR.
+ *
+ * @TODO(fangjun) Support batch size > 1
+ *
+ * @param model  The RnntModel
+ * @param encoder_out  Its shape is (1, num_frames, encoder_out_dim).
+ */
+std::vector<int32_t> GreedySearch(RnntModel &model,  // NOLINT
+                                  const Ort::Value &encoder_out);
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_DECODE_H_