online-websocket-client-microphone.py
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#!/usr/bin/env python3
#
# Copyright (c) 2023 Xiaomi Corporation
"""
A websocket client for sherpa-onnx-online-websocket-server
Usage:
./online-websocket-client-microphone.py \
--server-addr localhost \
--server-port 6006
(Note: You have to first start the server before starting the client)
You can find the server at
https://github.com/k2-fsa/sherpa-onnx/blob/master/sherpa-onnx/csrc/online-websocket-server.cc
Note: The server is implemented in C++.
There is also a C++ version of the client. Please see
https://github.com/k2-fsa/sherpa-onnx/blob/master/sherpa-onnx/csrc/online-websocket-client.cc
"""
import argparse
import asyncio
import sys
import time
import numpy as np
try:
import sounddevice as sd
except ImportError as e:
print("Please install sounddevice first. You can use")
print()
print(" pip install sounddevice")
print()
print("to install it")
sys.exit(-1)
try:
import websockets
except ImportError:
print("please run:")
print("")
print(" pip install websockets")
print("")
print("before you run this script")
print("")
sys.exit(-1)
def get_args():
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter
)
parser.add_argument(
"--server-addr",
type=str,
default="localhost",
help="Address of the server",
)
parser.add_argument(
"--server-port",
type=int,
default=6006,
help="Port of the server",
)
return parser.parse_args()
async def inputstream_generator(channels=1):
"""Generator that yields blocks of input data as NumPy arrays.
See https://python-sounddevice.readthedocs.io/en/0.4.6/examples.html#creating-an-asyncio-generator-for-audio-blocks
"""
q_in = asyncio.Queue()
loop = asyncio.get_event_loop()
def callback(indata, frame_count, time_info, status):
loop.call_soon_threadsafe(q_in.put_nowait, (indata.copy(), status))
devices = sd.query_devices()
print(devices)
default_input_device_idx = sd.default.device[0]
print(f'Use default device: {devices[default_input_device_idx]["name"]}')
print()
print("Started! Please speak")
stream = sd.InputStream(
callback=callback,
channels=channels,
dtype="float32",
samplerate=16000,
blocksize=int(0.05 * 16000), # 0.05 seconds
)
with stream:
while True:
indata, status = await q_in.get()
yield indata, status
async def receive_results(socket: websockets.WebSocketServerProtocol):
last_message = ""
async for message in socket:
if message != "Done!":
if last_message != message:
last_message = message
if last_message:
print(last_message)
else:
return last_message
async def run(
server_addr: str,
server_port: int,
):
async with websockets.connect(
f"ws://{server_addr}:{server_port}"
) as websocket: # noqa
receive_task = asyncio.create_task(receive_results(websocket))
print("Started! Please Speak")
async for indata, status in inputstream_generator():
if status:
print(status)
indata = indata.reshape(-1)
indata = np.ascontiguousarray(indata)
await websocket.send(indata.tobytes())
decoding_results = await receive_task
print("\nFinal result is:\n{decoding_results}")
async def main():
args = get_args()
print(vars(args))
server_addr = args.server_addr
server_port = args.server_port
await run(
server_addr=server_addr,
server_port=server_port,
)
if __name__ == "__main__":
try:
asyncio.run(main())
except KeyboardInterrupt:
print("\nCaught Ctrl + C. Exiting")