Delete app.py
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app.py
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import os
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import io
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import uuid
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import time
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import json
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import logging
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import tempfile
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import threading
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from flask import Flask, request, jsonify, send_file
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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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# ================= CONFIG =================
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TEMP_AUDIO_DIR = "/tmp/audio"
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os.makedirs(TEMP_AUDIO_DIR, exist_ok=True)
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STT_MODEL = "openai/whisper-tiny"
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LLM_MODEL = "google/flan-t5-base"
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MAX_AUDIO_SECONDS = 10
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MAX_TEXT_LEN = 200
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CLEANUP_INTERVAL = 300 # seconds
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FILE_EXPIRE_TIME = 600 # seconds
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# ================= LOG =================
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logging.basicConfig(
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level=logging.INFO,
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format="%(asctime)s | %(levelname)s | %(message)s"
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)
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logger = logging.getLogger(__name__)
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# ================= APP =================
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app = Flask(__name__)
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app.config["TEMP_AUDIO_DIR"] = TEMP_AUDIO_DIR
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# ================= LOAD MODELS =================
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logger.info("Loading STT model...")
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stt_pipeline = pipeline(
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"automatic-speech-recognition",
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model=STT_MODEL,
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device="cpu"
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)
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logger.info("Loading LLM model...")
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llm_pipeline = pipeline(
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"text2text-generation",
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model=LLM_MODEL,
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device="cpu"
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)
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logger.info("Models loaded successfully")
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# ================= UTILS =================
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def generate_tts_audio(text: str) -> bytes:
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"""
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Generate WAV 16kHz mono audio from text
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"""
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try:
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text = text.replace("\n", " ").strip()
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if not text:
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text = "I understand."
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text = text[:MAX_TEXT_LEN]
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logger.info(f"TTS: {text}")
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as wav_file:
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mp3_path = wav_file.name.replace(".wav", ".mp3")
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tts = gTTS(text=text, lang="en")
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tts.save(mp3_path)
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audio = AudioSegment.from_file(mp3_path)
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audio = audio.set_frame_rate(16000).set_channels(1)
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audio.export(wav_file.name, format="wav")
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with open(wav_file.name, "rb") as f:
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wav_data = f.read()
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os.remove(mp3_path)
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os.remove(wav_file.name)
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return wav_data
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except Exception as e:
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logger.error(f"TTS error: {e}", exc_info=True)
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return b""
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def cleanup_temp_files():
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while True:
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try:
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now = time.time()
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for filename in os.listdir(TEMP_AUDIO_DIR):
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path = os.path.join(TEMP_AUDIO_DIR, filename)
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if os.path.isfile(path):
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if now - os.path.getmtime(path) > FILE_EXPIRE_TIME:
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os.remove(path)
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except Exception as e:
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logger.warning(f"Cleanup error: {e}")
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time.sleep(CLEANUP_INTERVAL)
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# ================= ROUTES =================
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@app.route("/health", methods=["GET"])
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def health():
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return jsonify({
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"status": "ok",
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"stt": STT_MODEL,
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"llm": LLM_MODEL
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})
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@app.route("/process_audio", methods=["POST"])
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def process_audio():
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try:
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if "audio" not in request.files:
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return jsonify({"error": "No audio file"}), 400
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audio_file = request.files["audio"]
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raw_audio = audio_file.read()
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if len(raw_audio) < 1000:
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return jsonify({"error": "Audio too short"}), 400
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# ================= STT =================
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logger.info("Running STT...")
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stt_result = stt_pipeline(
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raw_audio,
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sampling_rate=16000
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)
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user_text = stt_result.get("text", "").strip()
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logger.info(f"User said: {user_text}")
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if not user_text:
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user_text = "Hello"
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# ================= LLM =================
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logger.info("Running LLM...")
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llm_result = llm_pipeline(
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user_text,
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max_new_tokens=64,
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do_sample=False
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)
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answer = llm_result[0]["generated_text"]
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logger.info(f"Answer: {answer}")
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# ================= TTS =================
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audio_response = generate_tts_audio(answer)
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if not audio_response:
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return jsonify({"error": "TTS failed"}), 500
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file_id = str(uuid.uuid4())
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filepath = os.path.join(TEMP_AUDIO_DIR, f"{file_id}.wav")
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with open(filepath, "wb") as f:
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f.write(audio_response)
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return send_file(
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filepath,
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mimetype="audio/wav",
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as_attachment=False,
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download_name="response.wav"
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)
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except Exception as e:
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logger.error(f"Processing error: {e}", exc_info=True)
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return jsonify({"error": "Internal error"}), 500
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# ================= STARTUP =================
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if __name__ == "__main__":
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threading.Thread(target=cleanup_temp_files, daemon=True).start()
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app.run(
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host="0.0.0.0",
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port=7860,
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threaded=True
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)
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