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Fix for exception on streaming on last chunk - copied from coqui-ai/TTS#3160 #688

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merged 1 commit into from
Nov 22, 2023
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Fix for exception on streaming on last chunk - copied from coqui-ai/TTS#3160 #688

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21 changes: 16 additions & 5 deletions tortoise/api_fast.py
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Original file line number Diff line number Diff line change
Expand Up @@ -277,17 +277,28 @@ def tts_with_preset(self, text, preset='fast', **kwargs):
settings.update(kwargs) # allow overriding of preset settings with kwargs
for audio_frame in self.tts(text, **settings):
yield audio_frame
# taken from here https://github.com/coqui-ai/TTS/blob/d21f15cc850788f9cdf93dac0321395138665287/TTS/tts/models/xtts.py#L666
# taken from here https://github.com/coqui-ai/TTS/blob/b4c552a112fd4c5f3477f439882eb43c2e2ce85f/TTS/tts/models/xtts.py#L600
def handle_chunks(self, wav_gen, wav_gen_prev, wav_overlap, overlap_len):
"""Handle chunk formatting in streaming mode"""
wav_chunk = wav_gen[:-overlap_len]
if wav_gen_prev is not None:
wav_chunk = wav_gen[(wav_gen_prev.shape[0] - overlap_len) : -overlap_len]
if wav_overlap is not None:
crossfade_wav = wav_chunk[:overlap_len]
crossfade_wav = crossfade_wav * torch.linspace(0.0, 1.0, overlap_len).to(crossfade_wav.device)
wav_chunk[:overlap_len] = wav_overlap * torch.linspace(1.0, 0.0, overlap_len).to(wav_overlap.device)
wav_chunk[:overlap_len] += crossfade_wav
# cross fade the overlap section
if overlap_len > len(wav_chunk):
# wav_chunk is smaller than overlap_len, pass on last wav_gen
if wav_gen_prev is not None:
wav_chunk = wav_gen[(wav_gen_prev.shape[0] - overlap_len):]
else:
# not expecting will hit here as problem happens on last chunk
wav_chunk = wav_gen[-overlap_len:]
return wav_chunk, wav_gen, None
else:
crossfade_wav = wav_chunk[:overlap_len]
crossfade_wav = crossfade_wav * torch.linspace(0.0, 1.0, overlap_len).to(crossfade_wav.device)
wav_chunk[:overlap_len] = wav_overlap * torch.linspace(1.0, 0.0, overlap_len).to(wav_overlap.device)
wav_chunk[:overlap_len] += crossfade_wav

wav_overlap = wav_gen[-overlap_len:]
wav_gen_prev = wav_gen
return wav_chunk, wav_gen_prev, wav_overlap
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