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from pathlib import Path
import pyaudio as pa
from pydub import AudioSegment, effects
class Recording:
def __init__(self, frames: list, channels: int, samplingRate: int, sampleFormat: int):
self._segment = AudioSegment(
data=b''.join(frames),
sample_width=sampleFormat,
frame_rate=samplingRate,
channels=channels
)
self._postProcess()
def _postProcess(self) -> None:
self._segment = effects.normalize(self._segment)
def writeWav(self, file: Path) -> None:
self._segment.export(str(file), format="wav")
def writeMp3(self, file: Path) -> None:
self._segment.export(str(file), format="mp3", bitrate="320k")
class Recorder:
def __init__(self, bufferSize: int, samplingRate: int):
self._bufferSize = bufferSize
self._samplingRate = samplingRate
self._sampleFormat = pa.paInt16
self._channels = 2
self._pa = pa.PyAudio()
self._stream = None
self._frames = []
def __del__(self):
if self.recording:
self._stream.stop_stream()
self._stream.close()
def _callback(self, inData, frameCount, timeInfo, statusFlags):
if statusFlags != pa.paNoError:
print(f"Recorder callback got status {hex(statusFlags)}, aborting")
return (None, pa.paAbort)
self._frames.append(inData)
return (None, pa.paContinue)
def startRecording(self) -> None:
if self.recording:
return
self._frames.clear()
self._stream = self._pa.open(format=self._sampleFormat,
channels=self._channels,
rate=self._samplingRate,
frames_per_buffer=self._bufferSize,
input=True,
stream_callback=self._callback)
def stopRecording(self) -> Recording:
if not self.recording:
return None
self._stream.stop_stream()
self._stream.close()
self._stream = None
return Recording(self._frames, self._channels, self._samplingRate, self._pa.get_sample_size(self._sampleFormat))
@property
def recording(self) -> bool:
return self._stream is not None
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