197 lines
5.9 KiB
Python
197 lines
5.9 KiB
Python
import logging
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from queue import Queue
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from threading import Event
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from typing import Callable, Optional, Sequence
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from platypush.message.event.assistant import AssistantEvent
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from platypush.utils import wait_for_either
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from ._intent import IntentProcessor
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from ._stt import SttProcessor
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class SpeechProcessor:
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"""
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Speech processor class that wraps the STT and Intent processors under the
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same interface.
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"""
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def __init__(
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self,
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stop_event: Event,
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model_path: Optional[str] = None,
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stt_enabled: bool = True,
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intent_enabled: bool = False,
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conversation_timeout: Optional[float] = None,
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get_cheetah_args: Callable[[], dict] = lambda: {},
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get_rhino_args: Callable[[], dict] = lambda: {},
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):
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self.logger = logging.getLogger(self.__class__.__name__)
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self._stt_enabled = stt_enabled
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self._intent_enabled = intent_enabled
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self._model_path = model_path
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self._conversation_timeout = conversation_timeout
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self._audio_queue = Queue()
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self._stop_event = stop_event
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self._get_cheetah_args = get_cheetah_args
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self._get_rhino_args = get_rhino_args
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self._stt_processor = SttProcessor(
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conversation_timeout=conversation_timeout,
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stop_event=stop_event,
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get_cheetah_args=get_cheetah_args,
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)
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self._intent_processor = IntentProcessor(
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conversation_timeout=conversation_timeout,
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stop_event=stop_event,
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get_rhino_args=get_rhino_args,
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)
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@property
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def enabled(self) -> bool:
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"""
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The processor is enabled if either the STT or the Intent processor are
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enabled.
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"""
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return self._stt_enabled or self._intent_enabled
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def should_stop(self) -> bool:
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return self._stop_event.is_set()
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def next_event(self, timeout: Optional[float] = None) -> Optional[AssistantEvent]:
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evt = None
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# Wait for either the STT or Intent processor to finish processing the audio
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completed = wait_for_either(
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self._stt_processor.processing_done,
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self._intent_processor.processing_done,
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self._stop_event,
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timeout=timeout,
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)
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if not completed:
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self.logger.warning('Timeout while waiting for the processors to finish')
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# Immediately return if the stop event is set
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if self.should_stop():
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return evt
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# Priority to the intent processor event, if the processor is enabled
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if self._intent_enabled:
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evt = self._intent_processor.last_event()
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if evt:
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self.logger.debug('Intent processor event: %s', evt)
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# If the intent processor didn't return any event, then return the STT
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# processor event
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if not evt and self._stt_enabled:
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evt = self._stt_processor.last_event()
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if evt:
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self.logger.debug('STT processor event: %s', evt)
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if evt:
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self._stt_processor.clear_wait()
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self._intent_processor.clear_wait()
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return evt
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def process(
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self, audio: Sequence[int], block: bool = True, timeout: Optional[float] = None
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) -> Optional[AssistantEvent]:
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"""
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Process an audio frame.
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The audio frame is enqueued to both the STT and Intent processors, if
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enabled. The function waits for either processor to finish processing
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the audio, and returns the event from the first processor that returns
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a result.
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Priority is given to the Intent processor if enabled, otherwise the STT
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processor is used.
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"""
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# Enqueue the audio to both the STT and Intent processors if enabled
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if self._stt_enabled:
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self._stt_processor.enqueue(audio)
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if self._intent_enabled:
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self._intent_processor.enqueue(audio)
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if not block:
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return None
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return self.next_event(timeout=timeout)
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def __enter__(self):
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"""
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Context manager entry point - it wraps :meth:`start`.
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"""
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self.start()
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def __exit__(self, *_, **__):
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"""
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Context manager exit point - it wraps :meth:`stop`.
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"""
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self.stop()
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def start(self):
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"""
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Start the STT and Intent processors.
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"""
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self._stt_processor.start()
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self._intent_processor.start()
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def stop(self):
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"""
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Stop the STT and Intent processors.
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"""
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self._stt_processor.stop()
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self._intent_processor.stop()
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def on_conversation_start(self):
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if self._stt_enabled:
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self._stt_processor.on_conversation_start()
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if self._intent_enabled:
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self._intent_processor.on_conversation_start()
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def on_conversation_end(self):
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if self._stt_enabled:
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self._stt_processor.on_conversation_end()
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if self._intent_enabled:
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self._intent_processor.on_conversation_end()
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def on_conversation_reset(self):
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if self._stt_enabled:
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self._stt_processor.on_conversation_reset()
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if self._intent_enabled:
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self._intent_processor.on_conversation_reset()
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@property
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def sample_rate(self) -> int:
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"""
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The sample rate of the audio frames.
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"""
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if self._intent_enabled:
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return self._intent_processor.sample_rate
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if self._stt_enabled:
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return self._stt_processor.sample_rate
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raise ValueError('No processor enabled')
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@property
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def frame_length(self) -> int:
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"""
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The frame length of the audio frames.
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"""
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if self._intent_enabled:
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return self._intent_processor.frame_length
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if self._stt_enabled:
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return self._stt_processor.frame_length
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raise ValueError('No processor enabled')
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