Add features to get_conditioning_latents

TTS/tts/models/xtts.py

@@ -5,6 +5,7 @@ from dataclasses import dataclass
 import torch
 import torch.nn.functional as F
 import torchaudio
+import librosa
 from coqpit import Coqpit
 
 from TTS.tts.layers.tortoise.audio_utils import denormalize_tacotron_mel, wav_to_univnet_mel
@@ -34,12 +35,8 @@ def load_audio(audiopath, sr=22050):
     """
     audio, sampling_rate = torchaudio.load(audiopath)
 
-    if len(audio.shape) > 1:
-        if audio.shape[0] < 5:
-            audio = audio[0]
-        else:
-            assert audio.shape[1] < 5
-            audio = audio[:, 0]
+    if audio.shape[0] > 1:
+            audio = audio.mean(0, keepdim=True)
 
     if sampling_rate != sr:
         resampler = torchaudio.transforms.Resample(sampling_rate, sr)
@@ -376,7 +373,7 @@ class Xtts(BaseTTS):
         return next(self.parameters()).device
 
     @torch.inference_mode()
-    def get_gpt_cond_latents(self, audio_path: str, length: int = 3):
+    def get_gpt_cond_latents(self, audio, sr, length: int = 3):
         """Compute the conditioning latents for the GPT model from the given audio.
 
         Args:
@@ -384,24 +381,21 @@ class Xtts(BaseTTS):
             length (int): Length of the audio in seconds. Defaults to 3.
         """
 
-        audio = load_audio(audio_path)
-        audio = audio[:, : 22050 * length]
-        mel = wav_to_mel_cloning(audio, mel_norms=self.mel_stats.cpu())
+        audio_22k = torchaudio.functional.resample(audio, sr, 22050)
+        audio_22k = audio_22k[:, : 22050 * length]
+        mel = wav_to_mel_cloning(audio_22k, mel_norms=self.mel_stats.cpu())
         cond_latent = self.gpt.get_style_emb(mel.to(self.device))
         return cond_latent.transpose(1, 2)
 
     @torch.inference_mode()
-    def get_diffusion_cond_latents(
-        self,
-        audio_path,
-    ):
+    def get_diffusion_cond_latents(self, audio, sr):
         from math import ceil
 
         diffusion_conds = []
         CHUNK_SIZE = 102400
-        audio = load_audio(audio_path, 24000)
-        for chunk in range(ceil(audio.shape[1] / CHUNK_SIZE)):
-            current_sample = audio[:, chunk * CHUNK_SIZE : (chunk + 1) * CHUNK_SIZE]
+        audio_24k = torchaudio.functional.resample(audio, sr, 24000)
+        for chunk in range(ceil(audio_24k.shape[1] / CHUNK_SIZE)):
+            current_sample = audio_24k[:, chunk * CHUNK_SIZE : (chunk + 1) * CHUNK_SIZE]
             current_sample = pad_or_truncate(current_sample, CHUNK_SIZE)
             cond_mel = wav_to_univnet_mel(
                 current_sample.to(self.device),
@@ -414,27 +408,38 @@ class Xtts(BaseTTS):
         return diffusion_latent
 
     @torch.inference_mode()
-    def get_speaker_embedding(self, audio_path):
-        audio = load_audio(audio_path, self.hifigan_decoder.speaker_encoder_audio_config["sample_rate"])
-        speaker_embedding = (
-            self.hifigan_decoder.speaker_encoder.forward(audio.to(self.device), l2_norm=True)
-            .unsqueeze(-1)
-            .to(self.device)
-        )
-        return speaker_embedding
+    def get_speaker_embedding(self, audio, sr):
+        audio_16k = torchaudio.functional.resample(audio, sr, 16000)
+        return self.hifigan_decoder.speaker_encoder.forward(
+            audio_16k.to(self.device), l2_norm=True
+        ).unsqueeze(-1).to(self.device)
     
+    @torch.inference_mode()
     def get_conditioning_latents(
         self,
         audio_path,
-        gpt_cond_len=3,
+        gpt_cond_len=6,
+        max_ref_length=10,
+        librosa_trim_db=None,
+        sound_norm_refs=False,
     ):  
         speaker_embedding = None
         diffusion_cond_latents = None
+
+        audio, sr = torchaudio.load(audio_path)
+        audio = audio[:, : sr * max_ref_length].to(self.device)
+        if audio.shape[0] > 1:
+            audio = audio.mean(0, keepdim=True)
+        if sound_norm_refs:
+            audio = (audio / torch.abs(audio).max()) * 0.75
+        if librosa_trim_db is not None:
+            audio = librosa.effects.trim(audio, top_db=librosa_trim_db)[0]
+
         if self.args.use_hifigan or self.args.use_ne_hifigan:
-            speaker_embedding = self.get_speaker_embedding(audio_path)
+            speaker_embedding = self.get_speaker_embedding(audio, sr)
         else:
-            diffusion_cond_latents = self.get_diffusion_cond_latents(audio_path)
-        gpt_cond_latents = self.get_gpt_cond_latents(audio_path, length=gpt_cond_len)  # [1, 1024, T]
+            diffusion_cond_latents = self.get_diffusion_cond_latents(audio, sr)
+        gpt_cond_latents = self.get_gpt_cond_latents(audio, sr, length=gpt_cond_len)  # [1, 1024, T]
         return gpt_cond_latents, diffusion_cond_latents, speaker_embedding
 
     def synthesize(self, text, config, speaker_wav, language, **kwargs):
@@ -494,7 +499,7 @@ class Xtts(BaseTTS):
         repetition_penalty=2.0,
         top_k=50,
         top_p=0.85,
-        gpt_cond_len=4,
+        gpt_cond_len=6,
         do_sample=True,
         # Decoder inference
         decoder_iterations=100,
@@ -531,7 +536,7 @@ class Xtts(BaseTTS):
                 (aka boring) outputs. Defaults to 0.8.
 
             gpt_cond_len: (int) Length of the audio used for cloning. If audio is shorter, then audio length is used
-                else the first `gpt_cond_len` secs is used. Defaults to 3 seconds.
+                else the first `gpt_cond_len` secs is used. Defaults to 6 seconds.
 
             decoder_iterations: (int) Number of diffusion steps to perform. [0,4000]. More steps means the network has
                 more chances to iteratively refine the output, which should theoretically mean a higher quality output.