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import os
import time
import gradio as gr
from huggingface_hub import InferenceClient
from metrics import (
init_metrics,
SERVICE_NAME,
ACTIVE_REQUESTS,
instrument_chord_request,
)
# --- Rule-based chord dictionary ---
CHORDS = {
frozenset(["C", "E", "G"]): "C Major",
frozenset(["A", "C#", "E"]): "A Major",
frozenset(["A", "C", "E"]): "A Minor",
frozenset(["D", "F#", "A"]): "D Major",
frozenset(["E", "G#", "B"]): "E Major",
frozenset(["G", "B", "D"]): "G Major",
frozenset(["F", "A", "C"]): "F Major",
}
init_metrics(
port=int(os.getenv("METRICS_PORT", "8000")),
service_name=os.getenv("SERVICE_NAME", "chord-bot-api"),
)
def identify_chord(notes):
"""
Identify chord name from a list of notes using dictionary lookup.
"""
key = frozenset([n.upper() for n in notes])
return CHORDS.get(key, "Unknown Chord")
# --- Hugging Face model client (API-based) ---
client = InferenceClient("google/flan-t5-small")
def predict_chord(notes: str):
"""
Takes a comma-separated string of notes and predicts the chord.
"""
if not notes.strip():
return "Please enter 2 or more notes."
# Clean and split notes
note_list = [n.strip() for n in notes.split(",") if n.strip()]
if len(note_list) < 2:
return "Please enter at least 2 notes."
# Rule-based chord lookup
chord = identify_chord(note_list)
if chord != "Unknown Chord":
return chord
# Fall back to LLM
prompt = f"Identify the musical chord made of notes: {', '.join(note_list)}"
try:
response = client.text_generation(prompt, max_new_tokens=20)
return response.strip()
except Exception as e:
return f"Error calling Hugging Face API: {e}"
# --- Gradio Interface ---
demo = gr.Interface(
fn=predict_chord,
inputs=gr.Textbox(lines=1, placeholder="Enter notes, e.g., C,E,G"),
outputs="text",
title="Chord Identifier (API-based)",
description="Enter two or more musical notes (comma-separated) and get the chord name."
)
if __name__ == "__main__":
import os
host = os.getenv("GRADIO_SERVER_NAME", "0.0.0.0")
port = int(os.getenv("GRADIO_SERVER_PORT", "7860"))
demo.launch(server_name=host, server_port=port, share=True)
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