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# 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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from fastapi import APIRouter
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from fastapi import WebSocket
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from fastapi import WebSocketDisconnect
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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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await websocket.accept()
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try:
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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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# get engine
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engine_pool = get_engine_pool()
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tts_engine = engine_pool['tts']
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# 获取 message 并转文本
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message = json.loads(message["text"])
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text_bese64 = message["text"]
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sentence = tts_engine.preprocess(text_bese64=text_bese64)
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# run
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wav_generator = tts_engine.run(sentence)
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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("Complete the transmission of audio streams")
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break
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except WebSocketDisconnect:
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pass
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