runtime trtllm: minor fixes. pytorch: update text_embedding logic to correct v0 batching.

src/f5_tts/model/backbones/dit.py

@@ -12,6 +12,7 @@ from __future__ import annotations
 import torch
 import torch.nn.functional as F
 from torch import nn
+from torch.nn.utils.rnn import pad_sequence
 from x_transformers.x_transformers import RotaryEmbedding
 
 from f5_tts.model.modules import (
@@ -236,19 +237,30 @@ class DiT(nn.Module):
         cache: bool = True,
         audio_mask: bool["b n"] | None = None,  # noqa: F722
     ):
-        seq_len = x.shape[1]
-        # TODO. modify to get text_embed one by one (to avoid misalignment when batching), as done in runtime imple.
+        if self.text_uncond is None or self.text_cond is None or not cache:
+            batch = x.shape[0]
+            seq_lens = audio_mask.sum(dim=1)
+            text_embed_list = []
+            for i in range(batch):
+                text_embed_i = self.text_embed(
+                    text[i].unsqueeze(0),
+                    seq_lens[i].item(),
+                    drop_text=drop_text,
+                    audio_mask=audio_mask,
+                )
+                text_embed_list.append(text_embed_i[0])
+            text_embed = pad_sequence(text_embed_list, batch_first=True, padding_value=0)
+            if cache:
+                if drop_text:
+                    self.text_uncond = text_embed
+                else:
+                    self.text_cond = text_embed
+
         if cache:
             if drop_text:
-                if self.text_uncond is None:
-                    self.text_uncond = self.text_embed(text, seq_len, drop_text=True, audio_mask=audio_mask)
                 text_embed = self.text_uncond
             else:
-                if self.text_cond is None:
-                    self.text_cond = self.text_embed(text, seq_len, drop_text=False, audio_mask=audio_mask)
                 text_embed = self.text_cond
-        else:
-            text_embed = self.text_embed(text, seq_len, drop_text=drop_text, audio_mask=audio_mask)
 
         x = self.input_embed(x, cond, text_embed, drop_audio_cond=drop_audio_cond)
 

src/f5_tts/runtime/triton_trtllm/model_repo_f5_tts/f5_tts/1/f5_tts_trtllm.py

@@ -42,13 +42,16 @@ class TextEmbedding(nn.Module):
         self.register_buffer("freqs_cis", precompute_freqs_cis(text_dim, precompute_max_pos), persistent=False)
         self.text_blocks = nn.Sequential(*[ConvNeXtV2Block(text_dim, text_dim * conv_mult) for _ in range(conv_layers)])
 
-    def forward(self, text, seq_len):
+    def forward(self, text, seq_len, drop_text=False):
         text = text + 1
         text = text[:, :seq_len]  # curtail if character tokens are more than the mel spec tokens
         text = F.pad(text, (0, seq_len - text.shape[1]), value=0)
         if self.mask_padding:
             text_mask = text == 0
 
+        if drop_text:  # cfg for text
+            text = torch.zeros_like(text)
+
         text = self.text_embed(text)  # b n -> b n d
         text = text + self.freqs_cis[:seq_len, :]
         if self.mask_padding:
@@ -385,17 +388,17 @@ class F5TTS(object):
         # get text_embed one by one to avoid misalignment
         text_and_drop_embedding_list = []
         for i in range(batch):
-            text_and_drop_embedding_i = self.text_embedding(
-                torch.cat(
-                    (
-                        text_pad_sequence[i].unsqueeze(0).to(self.device),
-                        torch.full((1, text_pad_sequence.shape[1]), -1, dtype=torch.int32).to(self.device),
-                    ),
-                    dim=0,
-                ),
+            text_embedding_i = self.text_embedding(
+                text_pad_sequence[i].unsqueeze(0).to(self.device),
                 estimated_reference_target_mel_len[i],
+                drop_text=False,
             )
-            text_and_drop_embedding_list.extend([text_and_drop_embedding_i[0], text_and_drop_embedding_i[1]])
+            text_embedding_drop_i = self.text_embedding(
+                text_pad_sequence[i].unsqueeze(0).to(self.device),
+                estimated_reference_target_mel_len[i],
+                drop_text=True,
+            )
+            text_and_drop_embedding_list.extend([text_embedding_i[0], text_embedding_drop_i[0]])
 
         # pad separately computed text_embed to form batch with max_seq_len
         text_and_drop_embedding = pad_sequence(

src/f5_tts/runtime/triton_trtllm/model_repo_f5_tts/f5_tts/1/model.py

@@ -229,7 +229,7 @@ class TritonPythonModel:
         max_seq_len = min(max(estimated_reference_target_mel_len), self.max_mel_len)
 
         batch = len(requests)
-        mel_features = torch.zeros((batch, max_seq_len, self.n_mel_channels), dtype=torch.float16).to(self.device)
+        mel_features = torch.zeros((batch, max_seq_len, self.n_mel_channels), dtype=torch.float32).to(self.device)
         for i, mel in enumerate(mel_features_list):
             mel_features[i, : mel.shape[1], :] = mel
 
@@ -254,9 +254,9 @@ class TritonPythonModel:
 
         responses = []
         for i in range(batch):
-            ref_me_len = reference_mel_len[i]
+            ref_mel_len = reference_mel_len[i]
             estimated_mel_len = estimated_reference_target_mel_len[i]
-            denoised_one_item = denoised[i, ref_me_len:estimated_mel_len, :].unsqueeze(0).transpose(1, 2)
+            denoised_one_item = denoised[i, ref_mel_len:estimated_mel_len, :].unsqueeze(0).transpose(1, 2)
             audio = self.forward_vocoder(denoised_one_item)
             if reference_rms_list[i] < self.target_rms:
                 audio = audio * reference_rms_list[i] / self.target_rms