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Update app.py
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app.py
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import torch
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from flask import Flask, render_template, request, jsonify
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import os
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from transformers import pipeline
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from gtts import gTTS
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from pydub import AudioSegment
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from pydub.silence import detect_nonsilent
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from waitress import serve
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app = Flask(__name__)
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# Use whisper-small for faster processing and better speed
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device = "cuda" if torch.cuda.is_available() else "cpu"
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asr_model = pipeline("automatic-speech-recognition", model="openai/whisper-small", device=0 if device == "cuda" else -1)
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# Function to generate audio prompts
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def generate_audio_prompt(text, filename):
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tts = gTTS(text=text, lang="en")
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tts.save(os.path.join("static", filename))
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# Generate required voice prompts
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prompts = {
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"welcome": "Welcome to Biryani Hub.",
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"ask_name": "Tell me your name.",
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"ask_email": "Please provide your email address.",
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"thank_you": "Thank you for registration."
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}
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for key, text in prompts.items():
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generate_audio_prompt(text, f"{key}.mp3")
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# Symbol mapping for proper recognition
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SYMBOL_MAPPING = {
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"at the rate": "@",
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"at": "@",
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"dot": ".",
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"underscore": "_",
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"hash": "#",
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"plus": "+",
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"dash": "-",
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"comma": ",",
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"space": " "
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}
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# Function to convert audio to WAV format
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def convert_to_wav(input_path, output_path):
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audio = AudioSegment.from_file(input_path)
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audio = audio.set_frame_rate(16000).set_channels(1) # Convert to 16kHz, mono
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audio.export(output_path, format="wav")
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except Exception as e:
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raise Exception(f"Audio conversion failed: {str(e)}")
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# Function to check if audio contains actual speech
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def is_silent_audio(audio_path):
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audio = AudioSegment.from_wav(audio_path)
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nonsilent_parts = detect_nonsilent(audio, min_silence_len=500, silence_thresh=audio.dBFS-16) # Reduced silence duration
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return len(nonsilent_parts) == 0 # If no speech detected
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@app.route("/")
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def index():
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return render_template("index.html")
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@app.route("/transcribe", methods=["POST"])
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def transcribe():
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if "audio" not in request.files:
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return jsonify({"error": "No audio file provided"}), 400
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audio_file = request.files["audio"]
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input_audio_path = os.path.join("static", "temp_input.wav")
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output_audio_path = os.path.join("static", "temp.wav")
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audio_file.save(input_audio_path)
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try:
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# Convert to WAV
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convert_to_wav(input_audio_path, output_audio_path)
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# Check for silence
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if is_silent_audio(output_audio_path):
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return jsonify({"error": "No speech detected. Please try again."}), 400
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# Use Whisper ASR model for transcription
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result = asr_model(output_audio_path, generate_kwargs={"language": "en"})
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transcribed_text = result["text"].strip().capitalize()
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return jsonify({"text": transcribed_text})
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except Exception as e:
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return jsonify({"error": f"Speech recognition error: {str(e)}"}), 500
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# Start Production Server
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if __name__ == "__main__":
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serve(app, host="0.0.0.0", port=7860)
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