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138 lines
4.9 KiB
138 lines
4.9 KiB
# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json
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import uuid
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from fastapi import APIRouter
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from fastapi import WebSocket
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from starlette.websockets import WebSocketState as WebSocketState
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from paddlespeech.cli.log import logger
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from paddlespeech.server.engine.engine_pool import get_engine_pool
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router = APIRouter()
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@router.websocket('/paddlespeech/tts/streaming')
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async def websocket_endpoint(websocket: WebSocket):
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"""PaddleSpeech Online TTS Server api
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Args:
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websocket (WebSocket): the websocket instance
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"""
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#1. the interface wait to accept the websocket protocal header
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# and only we receive the header, it establish the connection with specific thread
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await websocket.accept()
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#2. if we accept the websocket headers, we will get the online tts engine instance
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engine_pool = get_engine_pool()
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tts_engine = engine_pool['tts']
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connection_handler = None
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if tts_engine.engine_type == "online":
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from paddlespeech.server.engine.tts.online.python.tts_engine import PaddleTTSConnectionHandler
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elif tts_engine.engine_type == "online-onnx":
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from paddlespeech.server.engine.tts.online.onnx.tts_engine import PaddleTTSConnectionHandler
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else:
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logger.error("Online tts engine only support online or online-onnx.")
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sys.exit(-1)
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try:
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while True:
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# careful here, changed the source code from starlette.websockets
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assert websocket.application_state == WebSocketState.CONNECTED
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message = await websocket.receive()
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websocket._raise_on_disconnect(message)
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message = json.loads(message["text"])
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if 'signal' in message:
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# start request
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if message['signal'] == 'start':
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session = uuid.uuid1().hex
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resp = {
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"status": 0,
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"signal": "server ready",
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"session": session
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}
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connection_handler = PaddleTTSConnectionHandler(tts_engine)
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await websocket.send_json(resp)
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# end request
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elif message['signal'] == 'end':
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connection_handler = None
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resp = {
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"status": 0,
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"signal": "connection will be closed",
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"session": session
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}
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await websocket.send_json(resp)
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break
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else:
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resp = {"status": 0, "signal": "no valid json data"}
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await websocket.send_json(resp)
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# speech synthesis request
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elif 'text' in message:
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text = message["text"]
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spk_id = message["spk_id"]
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# run
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wav_generator = connection_handler.run(
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sentence=text, spk_id=spk_id)
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while True:
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try:
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tts_results = next(wav_generator)
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resp = {"status": 1, "audio": tts_results}
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await websocket.send_json(resp)
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except StopIteration as e:
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resp = {"status": 2, "audio": ''}
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await websocket.send_json(resp)
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logger.info(
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"Complete the synthesis of the audio streams")
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break
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except Exception as e:
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resp = {"status": -1, "audio": ''}
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await websocket.send_json(resp)
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break
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else:
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logger.error(
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"Invalid request, please check if the request is correct.")
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except Exception as e:
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logger.error(e)
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@router.get("/paddlespeech/tts/streaming/samplerate")
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def get_samplerate():
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try:
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engine_pool = get_engine_pool()
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tts_engine = engine_pool['tts']
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logger.info("Get tts engine successfully.")
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sample_rate = tts_engine.sample_rate
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response = {"sample_rate": sample_rate}
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except ServerBaseException as e:
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response = failed_response(e.error_code, e.msg)
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except BaseException:
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response = failed_response(ErrorCode.SERVER_UNKOWN_ERR)
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traceback.print_exc()
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return response
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