Routine to generate an ONNX model for ESPnet 2 - Text2Speech model

convert_tts2onnx.py

#!/usr/bin/env python3
"""Convert TTS to ONNX
Using ESPnet.

Test command:

python convert_tts2onnx.py --tts-tag espnet/kan-bayashi_ljspeech_vits
"""
import argparse
import logging
import sys
import numpy as np
import torch
import time

from typing import Dict
from typing import Optional

from espnet2.bin.tts_inference import Text2Speech
from espnet2.utils.types import str_or_none

import torch.nn.functional as F


def get_parser():
    parser = argparse.ArgumentParser(
        description="",
        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
    )
    parser.add_argument(
        "--tts-tag",
        required=True,
        type=str,
        help="TTS tag (or Directory) for model located at huggingface/zenodo/local"
    )
    return parser


### Add this at espnet2/gan_tts/vits/vits.py
def inference_onnx(
    self,
    text: torch.Tensor,
    text_lengths: torch.Tensor,
    sids: Optional[torch.Tensor] = None,
    spembs: Optional[torch.Tensor] = None,
    lids: Optional[torch.Tensor] = None,
    durations: Optional[torch.Tensor] = None,
    noise_scale: float = 0.667,
    noise_scale_dur: float = 0.8,
    alpha: float = 1.0,
    max_len: Optional[int] = None,
    use_teacher_forcing: bool = False,
) -> Dict[str, torch.Tensor]:
    """Run inference for ONNX.
    """

    if sids is not None:
        sids = sids.view(1)
    if lids is not None:
        lids = lids.view(1)
    if durations is not None:
        durations = durations.view(1, 1, -1)

    # inference
    if use_teacher_forcing:
        raise NotImplementedError
    else:
        wav, _, _ = self.generator.inference(
            text=text,
            text_lengths=text_lengths,
            sids=sids,
            spembs=spembs,
            lids=lids,
            dur=durations,
            noise_scale=noise_scale,
            noise_scale_dur=noise_scale_dur,
            alpha=alpha,
            max_len=max_len,
        )
    return wav.view(-1)


def test_onnx():
    logging.info('Test ONNX')
    import onnxruntime as ort

    this_text = 'Hello world, how are you doing'
    this_text = preprocessing("<dummy>", dict(text=this_text))['text']
    this_text = this_text[None]
    # this_len = np.array([this_text.shape[1]], dtype=int)
    ort_sess = ort.InferenceSession('tts_model.onnx')

    inname = [input.name for input in ort_sess.get_inputs()]
    outname = [output.name for output in ort_sess.get_outputs()]
    logging.info("inputs name: %s || outputs name: %s", inname, outname)
    outputs = ort_sess.run(None, {'input_text': this_text})
    logging.info(type(outputs))


if __name__ == "__main__":
    # Logger
    parser = get_parser()
    args = parser.parse_args()
    logfmt = "%(asctime)s (%(module)s:%(lineno)d) %(levelname)s: %(message)s"
    logging.basicConfig(filename='onnx.log', encoding='utf-8', level=logging.INFO, format=logfmt)

    # Load Pretrained model and testing wav generation
    logging.info("Preparing pretrained model from: %s", args.tts_tag)

    text2speech = Text2Speech.from_pretrained(
        model_tag=str_or_none(args.tts_tag),
        vocoder_tag=None,
        device="cuda",
        # Only for Tacotron 2 & Transformer
        threshold=0.5,
        # Only for Tacotron 2
        minlenratio=0.0,
        maxlenratio=10.0,
        use_att_constraint=False,
        backward_window=1,
        forward_window=3,
        # Only for FastSpeech & FastSpeech2 & VITS
        speed_control_alpha=1.0,
        # Only for VITS
        noise_scale=0.667,
        noise_scale_dur=0.8,
    )

    text = 'Hello world'
    logging.info("Generating test wav using the sequence: %s", text)
    with torch.no_grad():
        start = time.time()
        wav = text2speech(text)["wav"]
    rtf = (time.time() - start) / (len(wav) / text2speech.fs)
    logging.info(f"RTF = {rtf:5f}")

    # Prepare modules for conversion
    logging.info("Generate ONNX models")
    with torch.no_grad():
        device = text2speech.device
        preprocessing = text2speech.preprocess_fn
        model_tts = text2speech.tts

        # Replace forward with inference to avoid problems at ONNX generation
        model_tts.forward = model_tts.inference_onnx

        # Preprocessing data
        preproc_text = preprocessing("<dummy>", dict(text=text))['text']
        preproc_text = torch.from_numpy(preproc_text).to(device).unsqueeze(0)

        text_lengths = torch.tensor(
            [preproc_text.size(1)],
            dtype=torch.long,
            device=preproc_text.device,
        )
        wav = model_tts(preproc_text, text_lengths)

        logging.info(wav.shape)

        inputs = (preproc_text, text_lengths)
        # Generate TTS Model
        torch.onnx.export(
            model_tts,
            inputs,
            'tts_model.onnx',
            export_params=True,
            opset_version=13,
            do_constant_folding=True,
            verbose=True,
            input_names=['input_text'],
            output_names=['wav'],
            dynamic_axes={
                'input_text': {
                    1: 'length'
                },
                'wav': {
                    0: 'length'
                }
            }
        )

    test_onnx()
    sys.exit(0)

Sorry for the late response. I am checking for solutions . I will update u once finished

@Fhrozen Any updates?

Check this pls: https://github.com/Masao-Someki/espnet_onnx

@Fhrozen I also encountered this error, how did you solve it ？
onnxruntime.capi.onnxruntime_pybind11_state.RuntimeException: [ONNXRuntimeError] : 6 : RUNTIME_EXCEPTION : Non-zero status code returned while running Where node. Name:'Where_165' Status Message: /onnxruntime_src/onnxruntime/core/providers/cpu/math/element_wise_ops.h:497 void onnxruntime::BroadcastIterator::Init(ptrdiff_t, ptrdiff_t) axis == 1 || axis == largest was false. Attempting to broadcast an axis by a dimension other than 1. 8 by 19