optimize the implementation of lang tag

fairseq/criterions/ctc.py

@@ -367,9 +367,11 @@ class CtcCriterion(FairseqCriterion):
 
         src_tokens = sample["net_input"]["src_tokens"]
         src_lengths = sample["net_input"]["src_lengths"]
+        src_lang_idx = sample["net_input"].get("src_lang_idx", None)
         tgt_lang_idx = sample["net_input"].get("tgt_lang_idx", None)
         with torch.no_grad():
             encoder_out = model.encoder(src_tokens, src_lengths,
+                                        src_lang_idx=src_lang_idx,
                                         tgt_lang_idx=tgt_lang_idx)
 
             ctc_logit = None

fairseq/criterions/label_smoothed_cross_entropy_with_ctc.py

@@ -82,6 +82,7 @@ class LabelSmoothedCrossEntropyCriterionWithCTC(
         src_tokens = sample["net_input"]["src_tokens"]
         src_lengths = sample["net_input"]["src_lengths"]
         prev_output_tokens = sample["net_input"]["prev_output_tokens"]
+        src_lang_idx = sample["net_input"].get("src_lang_idx", None)
         tgt_lang_idx = sample["net_input"].get("tgt_lang_idx", None)
 
         train_enc_only = False
@@ -105,10 +106,12 @@ class LabelSmoothedCrossEntropyCriterionWithCTC(
                     ctc_alignment_oracle = self.ctc_criterion.get_ground_truth_alignment(model, sample)
                     encoder_out = model.encoder(src_tokens, src_lengths,
                                                 ctc_alignment_oracle=ctc_alignment_oracle,
+                                                src_lang_idx=src_lang_idx,
                                                 tgt_lang_idx=tgt_lang_idx)
             else:
                 encoder_out = model.encoder(src_tokens=src_tokens, 
                                             src_lengths=src_lengths, 
+                                            src_lang_idx=src_lang_idx,
                                             tgt_lang_idx=tgt_lang_idx)
 
         net_output = model.decoder(

fairseq/models/speech_to_text/s2t_transformer.py

@@ -1364,6 +1364,8 @@ class S2TTransformerEncoder(FairseqEncoder):
 
         self.compression_stat = False
 
+        self.log_flag_dict = dict()
+
         # gather cosine similarity
         self.gather_cos_sim = getattr(args, "gather_cos_sim", False)
         self.gather_cos_sim_dis = 2
@@ -1775,27 +1777,15 @@ class S2TTransformerEncoder(FairseqEncoder):
         if self.history is not None:
             self.history.clean()
 
+        src_lang_idx = kwargs.get("src_lang_idx", None)
         tgt_lang_idx = kwargs.get("tgt_lang_idx", None)
-        has_add_lang_tag = False
+
         # (B, T, D) -> (T, B, D)
         x = src_tokens.transpose(0, 1)
         input_lengths = src_lengths
         org_bsz = x.size(1)
 
         if (
-            self.mixup
-            and layer_idx == mixup_layer
-        ):
-            if tgt_lang_idx is not None:
-                assert self.embed_tokens is not None
-                tgt_lang_embed = self.embed_tokens(tgt_lang_idx).unsqueeze(0)
-                if mixup is not None:
-                    pass
-                x = torch.cat((tgt_lang_embed, x), 0)
-                input_lengths += 1
-                has_add_lang_tag = True
-
-        if (
             (self.training or self.mixup_infer)
             and self.mixup
             and layer_idx == mixup_layer
@@ -1815,14 +1805,25 @@ class S2TTransformerEncoder(FairseqEncoder):
         x, input_lengths = self.subsample(x, input_lengths)
         self.show_debug(x, "x after subsampling")
 
-        #if tgt_lang_idx is not None and False:
-        if tgt_lang_idx is not None and not has_add_lang_tag:
+        if src_lang_idx is not None:
+            assert self.embed_tokens is not None
+            src_lang_embed = self.embed_tokens(src_lang_idx).unsqueeze(0)
+            x = torch.cat((src_lang_embed, x), 0)
+            input_lengths += 1
+
+            if "prepend_src_lang" not in self.log_flag_dict:
+                self.log_flag_dict["prepend_src_lang"] = True
+                logger.info("Prepend the source language tag into the encoder input.")
+
+        if tgt_lang_idx is not None:
             assert self.embed_tokens is not None
             tgt_lang_embed = self.embed_tokens(tgt_lang_idx).unsqueeze(0)
-            if mixup is not None:
-                pass
             x = torch.cat((tgt_lang_embed, x), 0)
-            input_lengths += 1
+            input_lengths += 1    
+
+            if "prepend_tgt_lang" not in self.log_flag_dict:
+                self.log_flag_dict["prepend_tgt_lang"] = True
+                logger.info("Prepend the target language tag into the encoder input.")
 
         encoder_padding_mask = lengths_to_padding_mask(input_lengths)
         if encoder_padding_mask.size(1) < x.size(0):
@@ -2248,12 +2249,12 @@ class S2TTransformerEncoder(FairseqEncoder):
                 )
 
         if self.use_ctc and ctc_logit is None:
-            ctc_logit = self.ctc(x, encoder_padding_mask, "Encoder output", is_top=True)
+            ctc_logit = self.ctc(x, encoder_padding_mask, "Encoder CTC output", is_top=True)
             self.show_debug(x, "x after ctc")
 
         if self.use_xctc and xctc_logit is None:
             xctc_logit = self.xctc(
-                x, encoder_padding_mask, "Encoder output", is_top=True
+                x, encoder_padding_mask, "Encoder XCTC output", is_top=True
             )
             self.show_debug(x, "x after xctc")