97 lines
2.7 KiB
Python
97 lines
2.7 KiB
Python
from typing import Type
|
|
|
|
import sounddevice as sd
|
|
|
|
from platypush.message.event.sound import (
|
|
SoundRecordingPausedEvent,
|
|
SoundRecordingResumedEvent,
|
|
SoundRecordingStartedEvent,
|
|
SoundRecordingStoppedEvent,
|
|
)
|
|
|
|
from .._converters import RawInputAudioConverter
|
|
from .._model import AudioState, StreamType
|
|
from ._base import AudioThread
|
|
|
|
|
|
class AudioRecorder(AudioThread):
|
|
"""
|
|
The ``AudioRecorder`` thread is responsible for recording audio from the
|
|
input device, writing it to the converter process and dispatch the
|
|
converted audio to the registered consumers.
|
|
"""
|
|
|
|
def __init__(self, *args, output_format: str, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
self.output_format = output_format
|
|
|
|
@property
|
|
def direction(self) -> StreamType:
|
|
return StreamType.INPUT
|
|
|
|
def _audio_callback(self):
|
|
# _ = frames
|
|
# __ = time
|
|
def callback(indata, outdata, _, __, status):
|
|
if self.state != AudioState.RUNNING:
|
|
return
|
|
|
|
if status:
|
|
self.logger.warning('Recording callback status: %s', status)
|
|
|
|
if not self._converter:
|
|
self.logger.warning(
|
|
'The ffmpeg converter process has already terminated'
|
|
)
|
|
self.notify_stop()
|
|
raise sd.CallbackStop
|
|
|
|
try:
|
|
self._converter.write(indata.tobytes())
|
|
except AssertionError as e:
|
|
self.logger.warning('Audio converter callback error: %s', e)
|
|
self.state = AudioState.STOPPED
|
|
return
|
|
|
|
if self.audio_pass_through:
|
|
outdata[:] = indata
|
|
|
|
return callback
|
|
|
|
@property
|
|
def _audio_converter_type(self) -> Type[RawInputAudioConverter]:
|
|
return RawInputAudioConverter
|
|
|
|
@property
|
|
def _started_event_type(self) -> Type[SoundRecordingStartedEvent]:
|
|
return SoundRecordingStartedEvent
|
|
|
|
@property
|
|
def _stopped_event_type(self) -> Type[SoundRecordingStoppedEvent]:
|
|
return SoundRecordingStoppedEvent
|
|
|
|
@property
|
|
def _paused_event_type(self) -> Type[SoundRecordingPausedEvent]:
|
|
return SoundRecordingPausedEvent
|
|
|
|
@property
|
|
def _resumed_event_type(self) -> Type[SoundRecordingResumedEvent]:
|
|
return SoundRecordingResumedEvent
|
|
|
|
@property
|
|
def _converter_args(self) -> dict:
|
|
return {
|
|
'output_format': self.output_format,
|
|
**super()._converter_args,
|
|
}
|
|
|
|
@property
|
|
def _stream_args(self) -> dict:
|
|
return {
|
|
'callback': self._audio_callback(),
|
|
**super()._stream_args,
|
|
}
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|