# Copyright (c) 2021 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 base64
import io
import time
import librosa
import numpy as np
import paddle
import soundfile as sf
from scipy.io import wavfile
from paddlespeech.cli.log import logger
from paddlespeech.cli.tts.infer import TTSExecutor
from paddlespeech.server.engine.base_engine import BaseEngine
from paddlespeech.server.utils.audio_process import change_speed
from paddlespeech.server.utils.errors import ErrorCode
from paddlespeech.server.utils.exception import ServerBaseException
__all__ = ['TTSEngine']
class TTSServerExecutor(TTSExecutor):
def __init__(self):
super().__init__()
pass
class TTSEngine(BaseEngine):
"""TTS server engine
Args:
metaclass: Defaults to Singleton.
"""
def __init__(self, name=None):
"""Initialize TTS server engine
"""
super(TTSEngine, self).__init__()
def init(self, config: dict) -> bool:
self.executor = TTSServerExecutor()
self.config = config
try:
if self.config.device is not None:
self.device = self.config.device
else:
self.device = paddle.get_device()
paddle.set_device(self.device)
except BaseException as e:
logger.error(
"Set device failed, please check if device is already used and the parameter 'device' in the yaml file"
)
logger.error("Initialize TTS server engine Failed on device: %s." %
(self.device))
return False
try:
self.executor._init_from_path(
am=self.config.am,
am_config=self.config.am_config,
am_ckpt=self.config.am_ckpt,
am_stat=self.config.am_stat,
phones_dict=self.config.phones_dict,
tones_dict=self.config.tones_dict,
speaker_dict=self.config.speaker_dict,
voc=self.config.voc,
voc_config=self.config.voc_config,
voc_ckpt=self.config.voc_ckpt,
voc_stat=self.config.voc_stat,
lang=self.config.lang)
except BaseException:
logger.error("Failed to get model related files.")
logger.error("Initialize TTS server engine Failed on device: %s." %
(self.device))
return False
# warm up
try:
self.warm_up()
logger.info("Warm up successfully.")
except Exception as e:
logger.error("Failed to warm up on tts engine.")
return False
logger.info("Initialize TTS server engine successfully on device: %s." %
(self.device))
return True
def warm_up(self):
"""warm up
"""
if self.config.lang == 'zh':
sentence = "您好，欢迎使用语音合成服务。"
if self.config.lang == 'en':
sentence = "Hello and welcome to the speech synthesis service."
logger.info("Start to warm up.")
for i in range(3):
st = time.time()
self.executor.infer(
text=sentence,
lang=self.config.lang,
am=self.config.am,
spk_id=0, )
logger.info(
f"The response time of the {i} warm up: {time.time() - st} s")
def postprocess(self,
wav,
original_fs: int,
target_fs: int=0,
volume: float=1.0,
speed: float=1.0,
audio_path: str=None):
"""Post-processing operations, including speech, volume, sample rate, save audio file
Args:
wav (numpy(float)): Synthesized audio sample points
original_fs (int): original audio sample rate
target_fs (int): target audio sample rate
volume (float): target volume
speed (float): target speed
Raises:
ServerBaseException: Throws an exception if the change speed unsuccessfully.
Returns:
target_fs: target sample rate for synthesized audio.
wav_base64: The base64 format of the synthesized audio.
"""
# transform sample_rate
if target_fs == 0 or target_fs > original_fs:
target_fs = original_fs
wav_tar_fs = wav
logger.info(
"The sample rate of synthesized audio is the same as model, which is {}Hz".
format(original_fs))
else:
wav_tar_fs = librosa.resample(
np.squeeze(wav), original_fs, target_fs)
logger.info(
"The sample rate of model is {}Hz and the target sample rate is {}Hz. Converting the sample rate of the synthesized audio successfully.".
format(original_fs, target_fs))
# transform volume
wav_vol = wav_tar_fs * volume
logger.info("Transform the volume of the audio successfully.")
# transform speed
try: # windows not support soxbindings
wav_speed = change_speed(wav_vol, speed, target_fs)
logger.info("Transform the speed of the audio successfully.")
except ServerBaseException:
raise ServerBaseException(
ErrorCode.SERVER_INTERNAL_ERR,
"Failed to transform speed. Can not install soxbindings on your system. \
You need to set speed value 1.0.")
except BaseException:
logger.error("Failed to transform speed.")
# wav to base64
buf = io.BytesIO()
wavfile.write(buf, target_fs, wav_speed)
base64_bytes = base64.b64encode(buf.read())
wav_base64 = base64_bytes.decode('utf-8')
logger.info("Audio to string successfully.")
# save audio
if audio_path is not None:
if audio_path.endswith(".wav"):
sf.write(audio_path, wav_speed, target_fs)
elif audio_path.endswith(".pcm"):
wav_norm = wav_speed * (32767 / max(0.001,
np.max(np.abs(wav_speed))))
with open(audio_path, "wb") as f:
f.write(wav_norm.astype(np.int16))
logger.info("Save audio to {} successfully.".format(audio_path))
else:
logger.info("There is no need to save audio.")
return target_fs, wav_base64
def run(self,
sentence: str,
spk_id: int=0,
speed: float=1.0,
volume: float=1.0,
sample_rate: int=0,
save_path: str=None):
""" run include inference and postprocess.
Args:
sentence (str): text to be synthesized
spk_id (int, optional): speaker id for multi-speaker speech synthesis. Defaults to 0.
speed (float, optional): speed. Defaults to 1.0.
volume (float, optional): volume. Defaults to 1.0.
sample_rate (int, optional): target sample rate for synthesized audio,
0 means the same as the model sampling rate. Defaults to 0.
save_path (str, optional): The save path of the synthesized audio.
None means do not save audio. Defaults to None.
Raises:
ServerBaseException: Throws an exception if tts inference unsuccessfully.
ServerBaseException: Throws an exception if postprocess unsuccessfully.
Returns:
lang: model language
target_sample_rate: target sample rate for synthesized audio.
wav_base64: The base64 format of the synthesized audio.
"""
lang = self.config.lang
try:
infer_st = time.time()
self.executor.infer(
text=sentence, lang=lang, am=self.config.am, spk_id=spk_id)
infer_et = time.time()
infer_time = infer_et - infer_st
duration = len(self.executor._outputs['wav']
.numpy()) / self.executor.am_config.fs
rtf = infer_time / duration
except ServerBaseException:
raise ServerBaseException(ErrorCode.SERVER_INTERNAL_ERR,
"tts infer failed.")
except BaseException:
logger.error("tts infer failed.")
try:
postprocess_st = time.time()
target_sample_rate, wav_base64 = self.postprocess(
wav=self.executor._outputs['wav'].numpy(),
original_fs=self.executor.am_config.fs,
target_fs=sample_rate,
volume=volume,
speed=speed,
audio_path=save_path)
postprocess_et = time.time()
postprocess_time = postprocess_et - postprocess_st
except ServerBaseException:
raise ServerBaseException(ErrorCode.SERVER_INTERNAL_ERR,
"tts postprocess failed.")
except BaseException:
logger.error("tts postprocess failed.")
logger.info("AM model: {}".format(self.config.am))
logger.info("Vocoder model: {}".format(self.config.voc))
logger.info("Language: {}".format(lang))
logger.info("tts engine type: python")
logger.info("audio duration: {}".format(duration))
logger.info(
"frontend inference time: {}".format(self.executor.frontend_time))
logger.info("AM inference time: {}".format(self.executor.am_time))
logger.info("Vocoder inference time: {}".format(self.executor.voc_time))
logger.info("total inference time: {}".format(infer_time))
logger.info(
"postprocess (change speed, volume, target sample rate) time: {}".
format(postprocess_time))
logger.info("total generate audio time: {}".format(infer_time +
postprocess_time))
logger.info("RTF: {}".format(rtf))
logger.info("device: {}".format(self.device))
return lang, target_sample_rate, duration, wav_base64