add DecoderBase and license

speechx/speechx/decoder/ctc_beam_search_decoder.h

@@ -23,7 +23,7 @@
 
 namespace ppspeech {
 
-class CTCBeamSearch : public DecoderInterface {
+class CTCBeamSearch : public DecoderBase {
   public:
     explicit CTCBeamSearch(const CTCBeamSearchOptions& opts);
     ~CTCBeamSearch() {}

speechx/speechx/decoder/ctc_prefix_beam_search_decoder.h

+// Copyright (c) 2020 Mobvoi Inc (Binbin Zhang)
 // Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,6 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// modified from https://github.com/wenet-e2e/wenet/blob/main/runtime/core/decoder/ctc_prefix_beam_search.cc
+
 #pragma once
 
 #include "decoder/ctc_beam_search_opt.h"
@@ -21,7 +24,7 @@
 
 namespace ppspeech {
 class ContextGraph;
-class CTCPrefixBeamSearch : public DecoderInterface {
+class CTCPrefixBeamSearch : public DecoderBase {
   public:
     explicit CTCPrefixBeamSearch(const std::string vocab_path,
                                  const CTCBeamSearchOptions& opts);

speechx/speechx/decoder/ctc_prefix_beam_search_score.h

@@ -13,6 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// modified from https://github.com/wenet-e2e/wenet/blob/main/runtime/core/decoder/ctc_prefix_beam_search.h
+
 #pragma once
 
 #include "base/common.h"

speechx/speechx/decoder/ctc_tlg_decoder.h

@@ -54,7 +54,7 @@ struct TLGDecoderOptions {
     }
 };
 
-class TLGDecoder : public DecoderInterface {
+class TLGDecoder : public DecoderBase {
   public:
     explicit TLGDecoder(TLGDecoderOptions opts);
     ~TLGDecoder() = default;

speechx/speechx/decoder/decoder_itf.h

@@ -51,7 +51,10 @@ class DecoderInterface {
     virtual std::vector<std::pair<double, std::string>> GetNBestPath() = 0;
 
     virtual std::vector<std::pair<double, std::string>> GetNBestPath(int n) = 0;
+};
 
+class DecoderBase : public DecoderInterface {
+  protected:
     // start from one
     int NumFrameDecoded() { return num_frame_decoded_ + 1; }
 

speechx/speechx/nnet/u2_nnet.cc

+// Copyright 2022 Horizon Robotics. All Rights Reserved.
 // Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,6 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// modified from https://github.com/wenet-e2e/wenet/blob/main/runtime/core/decoder/asr_model.cc
+
 #include "nnet/u2_nnet.h"
 
 #ifdef USE_PROFILING

speechx/speechx/nnet/u2_nnet.h

+// Copyright 2022 Horizon Robotics. All Rights Reserved.
 // Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,6 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// modified from https://github.com/wenet-e2e/wenet/blob/main/runtime/core/decoder/asr_model.h
 #pragma once
 
 #include "base/common.h"