From e3c094ed9df65bc0079c48bebba496a683c95988 Mon Sep 17 00:00:00 2001
From: "shixian.shi" <shixian.shi@alibaba-inc.com>
Date: Wed, 29 Mar 2023 17:20:27 +0800
Subject: [PATCH] finetune entire bicif_paraformer

---
 funasr/models/e2e_asr_paraformer.py | 62 ++++++++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 1 deletion(-)

diff --git a/funasr/models/e2e_asr_paraformer.py b/funasr/models/e2e_asr_paraformer.py
index b57c8e228..f1bb2bfc1 100644
--- a/funasr/models/e2e_asr_paraformer.py
+++ b/funasr/models/e2e_asr_paraformer.py
@@ -1025,16 +1025,76 @@ class BiCifParaformer(Paraformer):
 
         # 1. Encoder
         encoder_out, encoder_out_lens = self.encode(speech, speech_lengths)
+        intermediate_outs = None
+        if isinstance(encoder_out, tuple):
+            intermediate_outs = encoder_out[1]
+            encoder_out = encoder_out[0]
 
+        loss_att, acc_att, cer_att, wer_att = None, None, None, None
+        loss_ctc, cer_ctc = None, None
+        loss_pre = None
         stats = dict()
 
+        # 1. CTC branch
+        if self.ctc_weight != 0.0:
+            loss_ctc, cer_ctc = self._calc_ctc_loss(
+                encoder_out, encoder_out_lens, text, text_lengths
+            )
+
+            # Collect CTC branch stats
+            stats["loss_ctc"] = loss_ctc.detach() if loss_ctc is not None else None
+            stats["cer_ctc"] = cer_ctc
+
+        # Intermediate CTC (optional)
+        loss_interctc = 0.0
+        if self.interctc_weight != 0.0 and intermediate_outs is not None:
+            for layer_idx, intermediate_out in intermediate_outs:
+                # we assume intermediate_out has the same length & padding
+                # as those of encoder_out
+                loss_ic, cer_ic = self._calc_ctc_loss(
+                    intermediate_out, encoder_out_lens, text, text_lengths
+                )
+                loss_interctc = loss_interctc + loss_ic
+
+                # Collect Intermedaite CTC stats
+                stats["loss_interctc_layer{}".format(layer_idx)] = (
+                    loss_ic.detach() if loss_ic is not None else None
+                )
+                stats["cer_interctc_layer{}".format(layer_idx)] = cer_ic
+
+            loss_interctc = loss_interctc / len(intermediate_outs)
+
+            # calculate whole encoder loss
+            loss_ctc = (
+                               1 - self.interctc_weight
+                       ) * loss_ctc + self.interctc_weight * loss_interctc
+
+        # 2b. Attention decoder branch
+        if self.ctc_weight != 1.0:
+            loss_att, acc_att, cer_att, wer_att, loss_pre = self._calc_att_loss(
+                encoder_out, encoder_out_lens, text, text_lengths
+            )
+
         loss_pre2 = self._calc_pre2_loss(
             encoder_out, encoder_out_lens, text, text_lengths
         )
 
-        loss = loss_pre2
+        # 3. CTC-Att loss definition
+        if self.ctc_weight == 0.0:
+            loss = loss_att + loss_pre * self.predictor_weight + loss_pre2 * self.predictor_weight * 0.5
+        elif self.ctc_weight == 1.0:
+            loss = loss_ctc
+        else:
+            loss = self.ctc_weight * loss_ctc + (1 - self.ctc_weight) * loss_att + loss_pre * self.predictor_weight + loss_pre2 * self.predictor_weight * 0.5
 
+        # Collect Attn branch stats
+        stats["loss_att"] = loss_att.detach() if loss_att is not None else None
+        stats["acc"] = acc_att
+        stats["cer"] = cer_att
+        stats["wer"] = wer_att
+        stats["loss_pre"] = loss_pre.detach().cpu() if loss_pre is not None else None
         stats["loss_pre2"] = loss_pre2.detach().cpu()
+
         stats["loss"] = torch.clone(loss.detach())
 
         # force_gatherable: to-device and to-tensor if scalar for DataParallel