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init_backend.py
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init_backend.py
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# 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 sys
import warnings
from . import wave_backend
from . import backend
from typing import List
import paddle
def _check_version(version: str) -> bool:
# require paddleaudio >= 1.0.2
ver_arr = version.split('.')
v0 = int(ver_arr[0])
v1 = int(ver_arr[1])
v2 = int(ver_arr[2])
if v0 < 1:
return False
if v0 == 1 and v1 == 0 and v2 <= 1:
return False
return True
def list_available_backends() -> List[str]:
""" List available backends, the backends in paddleaudio and the default backend.
Returns:
List[str]: The list of available backends.
Examples:
.. code-block:: python
import paddle
sample_rate = 16000
wav_duration = 0.5
num_channels = 1
num_frames = sample_rate * wav_duration
wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
waveform = wav_data.tile([num_channels, 1])
wav_path = "./test.wav"
current_backend = paddle.audio.backends.get_current_backend()
print(current_backend) # wave_backend, the default backend.
backends = paddle.audio.backends.list_available_backends()
# default backends is ['wave_backend']
# backends is ['wave_backend', 'soundfile'], if have installed paddleaudio >= 1.0.2
if 'soundfile' in backends:
paddle.audio.backends.set_backend('soundfile')
paddle.audio.backends.save(wav_path, waveform, sample_rate)
"""
backends = []
try:
import paddleaudio
except ImportError:
package = "paddleaudio"
warn_msg = (
"Failed importing {}. \n"
"only wave_banckend(only can deal with PCM16 WAV) supportted.\n"
"if want soundfile_backend(more audio type suppported),\n"
"please manually installed (usually with `pip install {} >= 1.0.2`). "
).format(package, package)
warnings.warn(warn_msg)
if "paddleaudio" in sys.modules:
version = paddleaudio.__version__
if _check_version(version) == False:
err_msg = (
"the version of paddleaudio installed is {},\n"
"please ensure the paddleaudio >= 1.0.2.").format(version)
raise ImportError(err_msg)
backends = paddleaudio.backends.list_audio_backends()
backends.append("wave_backend")
return backends
def get_current_backend() -> str:
""" Get the name of the current audio backend
Returns:
str: The name of the current backend,
the wave_backend or backend imported from paddleaudio
Examples:
.. code-block:: python
import paddle
sample_rate = 16000
wav_duration = 0.5
num_channels = 1
num_frames = sample_rate * wav_duration
wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
waveform = wav_data.tile([num_channels, 1])
wav_path = "./test.wav"
current_backend = paddle.audio.backends.get_current_backend()
print(current_backend) # wave_backend, the default backend.
backends = paddle.audio.backends.list_available_backends()
# default backends is ['wave_backend']
# backends is ['wave_backend', 'soundfile'], if have installed paddleaudio >= 1.0.2
if 'soundfile' in backends:
paddle.audio.backends.set_backend('soundfile')
paddle.audio.backends.save(wav_path, waveform, sample_rate)
"""
current_backend = None
if "paddleaudio" in sys.modules:
import paddleaudio
current_backend = paddleaudio.backends.get_audio_backend()
if backend.load == paddleaudio.load:
return current_backend
return "wave_backend"
def set_backend(backend_name: str):
"""Set the backend by one of the list_audio_backend return.
Args:
backend (str): one of the list_audio_backend. "wave_backend" is the default. "soundfile" imported from paddleaudio.
Examples:
.. code-block:: python
import paddle
sample_rate = 16000
wav_duration = 0.5
num_channels = 1
num_frames = sample_rate * wav_duration
wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
waveform = wav_data.tile([num_channels, 1])
wav_path = "./test.wav"
current_backend = paddle.audio.backends.get_current_backend()
print(current_backend) # wave_backend, the default backend.
backends = paddle.audio.backends.list_available_backends()
# default backends is ['wave_backend']
# backends is ['wave_backend', 'soundfile'], if have installed paddleaudio >= 1.0.2
if 'soundfile' in backends:
paddle.audio.backends.set_backend('soundfile')
paddle.audio.backends.save(wav_path, waveform, sample_rate)
"""
if backend_name not in list_available_backends():
raise NotImplementedError()
if backend_name == "wave_backend":
module = wave_backend
else:
import paddleaudio
paddleaudio.backends.set_audio_backend(backend_name)
module = paddleaudio
for func in ["save", "load", "info"]:
setattr(backend, func, getattr(module, func))
setattr(paddle.audio.backends, func, getattr(module, func))
def _init_set_audio_backend():
# init the default wave_backend.
for func in ["save", "load", "info"]:
setattr(backend, func, getattr(wave_backend, func))