app.py

import os
os.system("pip install git+https://github.com/openai/whisper.git")
os.system("pip install neon-tts-plugin-coqui==0.6.0")
import gradio as gr
import whisper 
import requests 
import tempfile
from neon_tts_plugin_coqui import CoquiTTS
from datasets import load_dataset
import random

dataset = load_dataset("ysharma/short_jokes", split="train")
filtered_dataset = dataset.filter(
    lambda x: (True not in [nsfw in x["Joke"].lower() for nsfw in ["warning", "fuck", "dead", "nsfw","69", "sex"]]) 
    )


# Model 2: Sentence Transformer
API_URL = "https://api-inference.huggingface.co/models/sentence-transformers/msmarco-distilbert-base-tas-b"
HF_TOKEN = os.environ["HF_TOKEN"]
headers = {"Authorization": f"Bearer {HF_TOKEN}"}

def query(payload):
    response = requests.post(API_URL, headers=headers, json=payload)
    return response.json()



# Language common in both the multilingual models - English, Chinese, Spanish, and French etc
# Model 1: Whisper: Speech-to-text
model = whisper.load_model("base")


#Model 2:  Text-to-Speech
LANGUAGES = list(CoquiTTS.langs.keys())
coquiTTS = CoquiTTS()
#Languages for Coqui are: ['en', 'es', 'fr', 'de', 'pl', 'uk', 'ro', 'hu', 'el', 'bg', 'nl', 'fi', 'sl', 'lv', 'ga']

  
# Driver function
def driver_fun(audio, text) : 
  print("*********** Inside Driver ************")
  if text == 'dummy': #audio is not None and 
    print(f"Audio is {audio}")
    translation, lang = whisper_stt(audio)  
  else:
    translation = text 
    
  random_val = random.randrange(0,231657)
  if random_val < 226657:
    lower_limit = random_val
    upper_limit = random_val + 4000 
  else:
    lower_limit = random_val - 4000
    upper_limit = random_val 
  print(f"lower_limit : upper_limit = {lower_limit} : {upper_limit}")  
  dataset_subset = filtered_dataset['Joke'][lower_limit : upper_limit]
  data = query({"inputs": {"source_sentence": translation ,"sentences": dataset_subset} } ) #"That is a happy person"
  if 'error' in data:
    print(f"Error is : {data}")
    return 'Error in model inference - Run Again Please', 'Error in model inference - Run Again Please', None
  print(f"type(data) : {type(data)}")
  print(f"data : {data} ")
  max_match_score = max(data)
  indx_score = data.index(max_match_score)
  joke = dataset_subset[indx_score]
  print(f"Joke is : {joke}")
  
  speech = tts(joke, 'en') 
  return translation, joke, speech 


# Whisper - speech-to-text
def whisper_stt(audio):
  print("Inside Whisper TTS")
  
  # load audio and pad/trim it to fit 30 seconds
  audio = whisper.load_audio(audio)
  audio = whisper.pad_or_trim(audio)
  
  # make log-Mel spectrogram and move to the same device as the model
  mel = whisper.log_mel_spectrogram(audio).to(model.device)
  
  # detect the spoken language
  _, probs = model.detect_language(mel)
  lang = max(probs, key=probs.get)
  print(f"Detected language: {max(probs, key=probs.get)}")
  
  # decode the audio
  options_transl = whisper.DecodingOptions(fp16 = False, language='en', task='translate') #lang
  result_transl = whisper.decode(model, mel, options_transl)  #model_med
  
  # print the transcribed text
  print(f"translation is : {result_transl.text}")

  return result_transl.text, lang 


# Coqui - Text-to-Speech
def tts(text, language):
  print(f"Inside tts - language is : {language}")
  print(f"Text is : {text}")
  with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as fp:
      coquiTTS.get_tts(text, fp, speaker = {"language" : language})
      return fp.name

demo = gr.Blocks()
with demo:
  gr.Markdown("<h1><center>AI Assistant - Voice to Joke</center></h1>")
  gr.Markdown(
        """<center>Just record <i><b>"Hey Whisper can you tell me a joke on X please?"</i></b>, X = anything you would wish.</center><br><center>Or, press record and just utter a theme. If you see the message 'Error in model inference - Run Again Please', just press the button again every time!</center>
        """)
  with gr.Row():
    with gr.Column(): 
      in_audio = gr.Audio(source="microphone",  type="filepath", label='Record your voice command here in English -')  #type='filepath'
      b1 = gr.Button("AI Response")
      out_transcript = gr.Textbox(label= 'Transcript of your Audio using OpenAI Whisper')
      
    with gr.Column():
      in_text = gr.Textbox(label='Or enter any text here..', value='dummy')
      out_audio = gr.Audio(label='Audio response form CoquiTTS')  
      out_generated_joke = gr.Textbox(label= 'Joke returned! ')
      
      b1.click(driver_fun,inputs=[in_audio, in_text], outputs=[out_transcript, out_generated_joke, out_audio]) #out_translation_en, out_generated_text,out_generated_text_en, 
  with gr.Row():
    gr.Markdown(
        """Model pipeline consisting of - <br>- [**Whisper**](https://github.com/openai/whisper) for Speech-to-text, <br>- [**CoquiTTS**](https://huggingface.co/coqui)  for Text-To-Speech.<br>- [Sentence Transformers](https://huggingface.co/models?library=sentence-transformers&sort=downloads)<br>- Front end is built using [**Gradio Block API**](https://gradio.app/docs/#blocks).<br><be>If you want to reuse the App, simply click on the small cross button in the top right corner of your voice record panel, and then press record again! <br><br> Few Caveats:<br>1. Please note that sometimes the joke might be NSFW. Although, I have tried putting in filters to not have that experience, but they seem non-exhaustive.<br>2. Sometimes the joke might not match your theme, please bear with the limited capabilities of free open-source ML prototypes.<br>3. Much like real life, sometimes the joke might just not land, haha!<br>4. Repeating this: If you see the message 'Error in model inference - Run Again Please', just press the button again every time!
        """)
  
demo.launch(enable_queue=True, debug=True)