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#!/usr/bin/env python3

"""Fun-ASR-Nano Python WebSocket Client.

Supports real-time microphone recording and audio file streaming.

Usage:

# Microphone mode

python client_python.py --server ws://localhost:10095 --mic

# File mode

python client_python.py --server ws://localhost:10095 --file audio.wav

# With hotwords

python client_python.py --server ws://localhost:10095 --file audio.wav --hotwords "张三,李四,北京"

# Disable speaker diarization display

python client_python.py --server ws://localhost:10095 --mic --no-spk

"""

import asyncio

import argparse

import json

import sys

import numpy as np

try:

import websockets

except ImportError:

print("Please install websockets: pip install websockets")

sys.exit(1)

SAMPLE_RATE = 16000

CHUNK_DURATION_MS = 100

CHUNK_SAMPLES = int(SAMPLE_RATE * CHUNK_DURATION_MS / 1000)

SPK_COLORS = [

"\033[36m", "\033[35m", "\033[33m", "\033[32m",

"\033[34m", "\033[91m", "\033[96m", "\033[95m",

]

RESET = "\033[0m"

GRAY = "\033[90m"

GREEN = "\033[92m"

def format_time(ms):

s = ms / 1000

return f"{s:.1f}s"

def print_result(data, show_spk=True):

"""Print ASR result to terminal."""

sentences = data.get("sentences", [])

partial = data.get("partial", "")

partial_start = data.get("partial_start_ms", 0)

is_final = data.get("is_final", False)

sys.stdout.write("\033[2J\033[H")

print(f"{GREEN}Fun-ASR-Nano Streaming ASR{RESET}")

print(f"{GRAY}{'─' * 60}{RESET}")

for s in sentences:

start = s.get("start", s.get("start_ms", 0))

end = s.get("end", s.get("end_ms", 0))

spk = s.get("spk", -1)

text = s["text"]

time_str = f"{GRAY}[{format_time(start)}-{format_time(end)}]{RESET}"

spk_str = ""

if show_spk and spk >= 0:

color = SPK_COLORS[spk % len(SPK_COLORS)]

spk_str = f" {color}SPK{spk}{RESET}"

print(f" {time_str}{spk_str} {text}")

if partial:

print(f" {GRAY}[{format_time(partial_start)}-...] {partial}{RESET}")

if is_final:

print(f"\n{GRAY}{'─' * 60}{RESET}")

print(f"{GREEN}Done.{RESET} {len(sentences)} sentences")

else:

print(f"\n{GRAY}Recording... Press Ctrl+C to stop{RESET}")

sys.stdout.flush()

async def run_mic(args):

"""Stream from microphone."""

try:

import sounddevice as sd

except ImportError:

print("Please install sounddevice: pip install sounddevice")

sys.exit(1)

print(f"Connecting to {args.server}...")

async with websockets.connect(args.server, ping_interval=None) as ws:

await ws.send("START")

resp = await ws.recv()

event = json.loads(resp)

if event.get("event") != "started":

print(f"Unexpected response: {resp}")

return

if args.hotwords:

await ws.send(f"HOTWORDS:{args.hotwords}")

await ws.recv()

print("Recording... Press Ctrl+C to stop\n")

audio_queue = asyncio.Queue()

def audio_callback(indata, frames, time_info, status):

audio_queue.put_nowait(indata.copy())

stream = sd.InputStream(

samplerate=SAMPLE_RATE, channels=1, dtype='int16',

blocksize=CHUNK_SAMPLES, callback=audio_callback,

)

async def send_audio():

with stream:

while True:

chunk = await audio_queue.get()

await ws.send(chunk.tobytes())

async def recv_results():

async for msg in ws:

data = json.loads(msg)

if "sentences" in data:

print_result(data, show_spk=args.spk)

if data.get("is_final") or data.get("event") == "stopped":

break

send_task = asyncio.create_task(send_audio())

recv_task = asyncio.create_task(recv_results())

try:

await asyncio.gather(send_task, recv_task)

except (KeyboardInterrupt, asyncio.CancelledError):

pass

finally:

send_task.cancel()

if ws.open:

await ws.send("STOP")

async for msg in ws:

data = json.loads(msg)

if "sentences" in data:

print_result(data, show_spk=args.spk)

if data.get("is_final") or data.get("event") == "stopped":

break

async def run_file(args):

"""Stream an audio file."""

try:

import soundfile as sf

except ImportError:

print("Please install soundfile: pip install soundfile")

sys.exit(1)

audio, sr = sf.read(args.file)

if sr != SAMPLE_RATE:

try:

import librosa

audio = librosa.resample(audio, orig_sr=sr, target_sr=SAMPLE_RATE)

except ImportError:

print(f"Audio is {sr}Hz, need 16kHz. Install librosa: pip install librosa")

sys.exit(1)

if audio.ndim > 1:

audio = audio[:, 0]

audio = audio.astype(np.float32)

duration = len(audio) / SAMPLE_RATE

print(f"File: {args.file} ({duration:.1f}s)")

print(f"Connecting to {args.server}...")

async with websockets.connect(args.server, ping_interval=None) as ws:

await ws.send("START")

await ws.recv()

if args.hotwords:

await ws.send(f"HOTWORDS:{args.hotwords}")

await ws.recv()

int16 = (audio * 32768).clip(-32768, 32767).astype(np.int16)

chunk_size = CHUNK_SAMPLES

total_chunks = (len(int16) + chunk_size - 1) // chunk_size

async def send_audio():

for i in range(0, len(int16), chunk_size):

chunk = int16[i:i+chunk_size]

await ws.send(chunk.tobytes())

await asyncio.sleep(CHUNK_DURATION_MS / 1000 * 0.5)

await ws.send("STOP")

async def recv_results():

async for msg in ws:

data = json.loads(msg)

if "sentences" in data:

print_result(data, show_spk=args.spk)

if data.get("is_final") or data.get("event") == "stopped":

break

await asyncio.gather(send_audio(), recv_results())

def main():

parser = argparse.ArgumentParser(description="Fun-ASR-Nano Python Client")

parser.add_argument("--server", type=str, default="ws://localhost:10095")

parser.add_argument("--mic", action="store_true", help="Use microphone input")

parser.add_argument("--file", type=str, help="Audio file to transcribe")

parser.add_argument("--hotwords", type=str, default="", help="Hotwords (comma-separated)")

parser.add_argument("--spk", action="store_true", default=True, help="Show speaker IDs")

parser.add_argument("--no-spk", dest="spk", action="store_false")

args = parser.parse_args()

if not args.mic and not args.file:

parser.error("Specify --mic or --file")

try:

if args.mic:

asyncio.run(run_mic(args))

else:

asyncio.run(run_file(args))

except KeyboardInterrupt:

print(f"\n{RESET}Interrupted.")

if __name__ == "__main__":

main()

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