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PaddleSpeech/paddlespeech/server/ws/tts_api.py

105 lines
3.8 KiB

# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import json
import uuid
from fastapi import APIRouter
from fastapi import WebSocket
from starlette.websockets import WebSocketState as WebSocketState
from paddlespeech.cli.log import logger
from paddlespeech.server.engine.engine_pool import get_engine_pool
router = APIRouter()
@router.websocket('/paddlespeech/tts/streaming')
async def websocket_endpoint(websocket: WebSocket):
"""PaddleSpeech Online TTS Server api
Args:
websocket (WebSocket): the websocket instance
"""
#1. the interface wait to accept the websocket protocal header
# and only we receive the header, it establish the connection with specific thread
await websocket.accept()
#2. if we accept the websocket headers, we will get the online tts engine instance
engine_pool = get_engine_pool()
tts_engine = engine_pool['tts']
try:
while True:
# careful here, changed the source code from starlette.websockets
assert websocket.application_state == WebSocketState.CONNECTED
message = await websocket.receive()
websocket._raise_on_disconnect(message)
message = json.loads(message["text"])
if 'signal' in message:
# start request
if message['signal'] == 'start':
session = uuid.uuid1().hex
resp = {
"status": 0,
"signal": "server ready",
"session": session
}
await websocket.send_json(resp)
# end request
elif message['signal'] == 'end':
resp = {
"status": 0,
"signal": "connection will be closed",
"session": session
}
await websocket.send_json(resp)
break
else:
resp = {"status": 0, "signal": "no valid json data"}
await websocket.send_json(resp)
# speech synthesis request
elif 'text' in message:
text_bese64 = message["text"]
sentence = tts_engine.preprocess(text_bese64=text_bese64)
# run
wav_generator = tts_engine.run(sentence)
while True:
try:
tts_results = next(wav_generator)
resp = {"status": 1, "audio": tts_results}
await websocket.send_json(resp)
except StopIteration as e:
resp = {"status": 2, "audio": ''}
await websocket.send_json(resp)
logger.info(
"Complete the synthesis of the audio streams")
break
except Exception as e:
resp = {"status": -1, "audio": ''}
await websocket.send_json(resp)
break
else:
logger.error(
"Invalid request, please check if the request is correct.")
except Exception as e:
logger.error(e)