app.py

import os

import gradio as gr
import torch
import nemo.collections.asr as nemo_asr
import wandb
from pydub.utils import mediainfo


MODEL_HISTORY_DAYS = 180
WANDB_ENTITY = os.environ.get("WANDB_ENTITY", "tarteel")
WANDB_PROJECT_NAME = os.environ.get("WANDB_PROJECT_NAME", "nemo-experiments")
MODEL_NAME = os.environ.get("MODEL_NAME", "CfCtcLg-SpeUni1024-DI-EATLDN-CA:v0")


def get_device():
    if torch.cuda.is_available():
        return "cuda"
    else:
        return "cpu"


# run = wandb.init(entity=WANDB_ENTITY, project=WANDB_PROJECT_NAME)
wandb_api = wandb.Api(overrides={"entity": WANDB_ENTITY})

artifact = wandb_api.artifact(f"{WANDB_ENTITY}/{WANDB_PROJECT_NAME}/{MODEL_NAME}")
artifact_dir = artifact.download()

# find the model (ending with .nemo) in the artifact directory
model_path = [
    os.path.join(root, file)
    for root, dirs, files in os.walk(artifact_dir)
    for file in files
    if file.endswith(".nemo")
][0]

model = nemo_asr.models.EncDecCTCModelBPE.restore_from(
    model_path, map_location=get_device()
)


def transcribe(audio_file):
    transcription = model.transcribe([audio_file], verbose=False)[0]
    print(f"{audio_file}: {transcription}")
    return transcription


def get_duration_ms(audio_file):
    duration = mediainfo(audio_file)["duration"]  # a string in seconds
    duration_ms = int(float(duration) * 1000)
    print(f"{audio_file}: {duration_ms} ms")
    return duration_ms


demo = gr.Blocks()

with demo:
    gr.Markdown(
        """
        # ﷽
        """
    )
    with gr.Row():
        audio_file = gr.Audio(source="upload", type="filepath", label="File")

    with gr.Row():
        output_file = gr.TextArea(label="Audio Transcription")

    b1 = gr.Button("Transcribe")

    b1.click(
        transcribe,
        inputs=[audio_file],
        outputs=[output_file],
        api_name="transcribe",
    )

    b2 = gr.Button("Get Duration")

    with gr.Row():
        duration = gr.TextArea(label="Duration")

    b2.click(
        get_duration_ms,
        inputs=[audio_file],
        outputs=[duration],
        api_name="get_duration_ms",
    )

demo.launch()