Add debug recording for wake/stt

wyoming_satellite/__main__.py

@@ -222,6 +222,9 @@ async def main() -> None:
         help="Host address for zeroconf discovery (default: detect)",
     )
     #
+    parser.add_argument(
+        "--debug-recording-dir", help="Directory to store audio for debugging"
+    )
     parser.add_argument("--debug", action="store_true", help="Log DEBUG messages")
     args = parser.parse_args()
 
@@ -258,6 +261,10 @@ async def main() -> None:
     logging.basicConfig(level=logging.DEBUG if args.debug else logging.INFO)
     _LOGGER.debug(args)
 
+    if args.debug_recording_dir:
+        args.debug_recording_dir = Path(args.debug_recording_dir)
+        _LOGGER.info("Recording audio to %s", args.debug_recording_dir)
+
     wyoming_info = Info(
         satellite=Satellite(
             name=args.name,
@@ -320,6 +327,7 @@ async def main() -> None:
             tts_stop=split_command(args.tts_stop_command),
             error=split_command(args.error_command),
         ),
+        debug_recording_dir=args.debug_recording_dir,
     )
 
     satellite: SatelliteBase

wyoming_satellite/satellite.py

@@ -22,7 +22,7 @@ from wyoming.vad import VoiceStarted, VoiceStopped
 from wyoming.wake import Detect, Detection, WakeProcessAsyncClient
 
 from .settings import SatelliteSettings
-from .utils import multiply_volume, run_event_command, wav_to_events
+from .utils import DebugAudioWriter, multiply_volume, run_event_command, wav_to_events
 from .vad import SileroVad
 from .webrtc import WebRtcAudio
 
@@ -60,6 +60,19 @@ class SatelliteBase:
         self._event_task: Optional[asyncio.Task] = None
         self._event_queue: "Optional[asyncio.Queue[Event]]" = None
 
+        # Debug audio recording
+        self.wake_audio_writer: Optional[DebugAudioWriter] = None
+        self.stt_audio_writer: Optional[DebugAudioWriter] = None
+        if settings.debug_recording_dir:
+            self.wake_audio_writer = DebugAudioWriter(
+                settings.debug_recording_dir,
+                "wake",
+                ring_buffer_size=(2 * 16000 * 2 * 1),  # last 2 sec
+            )
+            self.stt_audio_writer = DebugAudioWriter(
+                settings.debug_recording_dir, "stt"
+            )
+
     @property
     def is_running(self) -> bool:
         """True if not stopping/stopped."""
@@ -747,7 +760,16 @@ class AlwaysStreamingSatellite(SatelliteBase):
             _LOGGER.info("Streaming audio")
             await self._send_run_pipeline()
             await self.trigger_streaming_start()
+        elif Detection.is_type(event.type):
+            # Start debug recording
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.start()
         elif Transcript.is_type(event.type):
+            # Stop debug recording
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.stop()
+
+            # We're always streaming
             _LOGGER.info("Streaming audio")
 
             # Re-trigger streaming start even though we technically don't stop
@@ -764,6 +786,14 @@ class AlwaysStreamingSatellite(SatelliteBase):
             # Forward to server
             await self.event_to_server(event)
 
+            # Debug audio recording
+            if self.stt_audio_writer is not None:
+                if audio_bytes is None:
+                    chunk = AudioChunk.from_event(event)
+                    audio_bytes = chunk.audio
+
+                self.stt_audio_writer.write(audio_bytes)
+
 
 # -----------------------------------------------------------------------------
 
@@ -801,6 +831,14 @@ class VadStreamingSatellite(SatelliteBase):
 
         if RunSatellite.is_type(event.type):
             _LOGGER.info("Waiting for speech")
+        elif Detection.is_type(event.type):
+            # Start debug recording
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.start()
+        elif Transcript.is_type(event.type):
+            # Stop debug recording
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.stop()
 
     async def event_from_mic(
         self, event: Event, audio_bytes: Optional[bytes] = None
@@ -808,6 +846,18 @@ class VadStreamingSatellite(SatelliteBase):
         if not AudioChunk.is_type(event.type):
             return
 
+        # Only unpack chunk once
+        chunk: Optional[AudioChunk] = None
+
+        # Debug audio recording
+        if self.stt_audio_writer is not None:
+            if audio_bytes is None:
+                # Need to unpack
+                chunk = AudioChunk.from_event(event)
+                audio_bytes = chunk.audio
+
+            self.stt_audio_writer.write(audio_bytes)
+
         if (
             self.is_streaming
             and (self.timeout_seconds is not None)
@@ -817,6 +867,10 @@ class VadStreamingSatellite(SatelliteBase):
             self.is_streaming = False
             self.timeout_seconds = None
 
+            # Stop debug recording
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.stop()
+
             # Stop pipeline
             await self.event_to_server(AudioStop().event())
 
@@ -825,10 +879,11 @@ class VadStreamingSatellite(SatelliteBase):
 
         if not self.is_streaming:
             # Check VAD
-            chunk: Optional[AudioChunk] = None
             if audio_bytes is None:
-                # Need to unpack
+                if chunk is None:
-                chunk = AudioChunk.from_event(event)
+                    # Need to unpack
+                    chunk = AudioChunk.from_event(event)
+
                 audio_bytes = chunk.audio
 
             if not self.vad(audio_bytes):
@@ -905,26 +960,61 @@ class WakeStreamingSatellite(SatelliteBase):
         if settings.vad.enabled:
             _LOGGER.warning("VAD is enabled but will not be used")
 
+        # Used for debug audio recording so both wake and stt WAV files have the
+        # same timestamp.
+        self._debug_recording_timestamp: Optional[int] = None
+
     async def event_from_server(self, event: Event) -> None:
-        if Transcript.is_type(event.type):
+        # Only check event types once
+        is_run_satellite = False
+        is_transcript = False
+
+        if RunSatellite.is_type(event.type):
+            is_run_satellite = True
+        elif Transcript.is_type(event.type):
+            is_transcript = True
+
+        if is_transcript:
             # Stop streaming before event_from_server is called because it will
             # play the "done" WAV.
             self.is_streaming = False
 
+            # Stop debug recording (stt)
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.stop()
+
         await super().event_from_server(event)
 
-        if RunSatellite.is_type(event.type) or Transcript.is_type(event.type):
+        if is_run_satellite or is_transcript:
+            # Stop streaming and go back to wake word detection
             self.is_streaming = False
             await self.trigger_streaming_stop()
             await self._send_wake_detect()
             _LOGGER.info("Waiting for wake word")
 
+            # Start debug recording (wake)
+            self._debug_recording_timestamp = time.monotonic_ns()
+            if self.wake_audio_writer is not None:
+                self.wake_audio_writer.start(timestamp=self._debug_recording_timestamp)
+
     async def event_from_mic(
         self, event: Event, audio_bytes: Optional[bytes] = None
     ) -> None:
         if not AudioChunk.is_type(event.type):
             return
 
+        # Debug audio recording
+        if (self.wake_audio_writer is not None) or (self.stt_audio_writer is not None):
+            if audio_bytes is None:
+                chunk = AudioChunk.from_event(event)
+                audio_bytes = chunk.audio
+
+            if self.wake_audio_writer is not None:
+                self.wake_audio_writer.write(audio_bytes)
+
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.write(audio_bytes)
+
         if self.is_streaming:
             # Forward to server
             await self.event_to_server(event)
@@ -947,6 +1037,14 @@ class WakeStreamingSatellite(SatelliteBase):
                 _LOGGER.debug("Wake word detection occurred during refractory period")
                 return
 
+            # Stop debug recording (wake)
+            if self.wake_audio_writer is not None:
+                self.wake_audio_writer.stop()
+
+            # Start debug recording (stt)
+            if self.stt_audio_writer is not None:
+                self.stt_audio_writer.start(timestamp=self._debug_recording_timestamp)
+
             self.is_streaming = True
             _LOGGER.debug("Streaming audio")
 

wyoming_satellite/settings.py

@@ -1,6 +1,7 @@
 """Satellite settings."""
 from abc import ABC
 from dataclasses import dataclass, field
+from pathlib import Path
 from typing import List, Optional
 
 
@@ -160,4 +161,8 @@ class SatelliteSettings:
     wake: WakeSettings = field(default_factory=WakeSettings)
     snd: SndSettings = field(default_factory=SndSettings)
     event: EventSettings = field(default_factory=EventSettings)
+
     restart_timeout: float = 5.0
+
+    debug_recording_dir: Optional[Path] = None
+    """Path to directory where debug audio is written."""

wyoming_satellite/utils/__init__.py

@@ -1,5 +1,11 @@
 """Utility methods."""
-from .audio import AudioBuffer, chunk_samples, multiply_volume, wav_to_events
+from .audio import (
+    AudioBuffer,
+    DebugAudioWriter,
+    chunk_samples,
+    multiply_volume,
+    wav_to_events,
+)
 from .misc import (
     get_mac_address,
     needs_silero,
@@ -11,6 +17,7 @@ from .misc import (
 __all__ = [
     "AudioBuffer",
     "chunk_samples",
+    "DebugAudioWriter",
     "get_mac_address",
     "multiply_volume",
     "needs_silero",

wyoming_satellite/utils/audio.py

@@ -1,10 +1,12 @@
 """Audio utilities."""
 import array
 import logging
+import time
 import wave
 from pathlib import Path
-from typing import Iterable, Iterator, Union
+from typing import Iterable, Iterator, Optional, Union
 
+from pyring_buffer import RingBuffer
 from wyoming.audio import AudioChunk, AudioStart, AudioStop
 from wyoming.event import Event
 
@@ -130,3 +132,74 @@ def wav_to_events(
             audio_bytes = wav_file.readframes(samples_per_chunk)
 
         yield AudioStop(timestamp=timestamp).event()
+
+
+class DebugAudioWriter:
+    def __init__(
+        self,
+        dir_path: Union[str, Path],
+        suffix: str,
+        rate: int = 16000,
+        width: int = 2,
+        channels: int = 1,
+        ring_buffer_size: Optional[int] = None,
+    ) -> None:
+        self.dir_path = Path(dir_path)
+        self.suffix = suffix
+        self.rate = rate
+        self.width = width
+        self.channels = channels
+
+        self._wav_path: Optional[Path] = None
+        self._wav_writer: Optional[wave.Wave_write] = None
+
+        # If ring buffer size is set, we will hold audio in a ring buffer
+        # instead of directly writing it to disk.
+        #
+        # This allows only the last few seconds of wake word audio to be stored.
+        self._ring_buffer: Optional[RingBuffer] = None
+        if ring_buffer_size is not None:
+            # Hold audio in a ring buffer before writing
+            self._ring_buffer = RingBuffer(ring_buffer_size)
+
+    def start(self, timestamp: Optional[int] = None) -> None:
+        self.stop()
+
+        if timestamp is None:
+            timestamp = time.monotonic_ns()
+
+        self._wav_path = self.dir_path / f"{timestamp}-{self.suffix}.wav"
+        self._wav_path.parent.mkdir(parents=True, exist_ok=True)
+
+        self._wav_writer = wave.open(str(self._wav_path), "wb")
+        self._wav_writer.setframerate(self.rate)
+        self._wav_writer.setsampwidth(self.width)
+        self._wav_writer.setnchannels(self.channels)
+
+        _LOGGER.debug("Started recording to %s", self._wav_path)
+
+    def write(self, audio: bytes) -> None:
+        if self._wav_writer is None:
+            return
+
+        if self._ring_buffer is not None:
+            # Hold audio in a ring buffer before writing
+            self._ring_buffer.put(audio)
+        else:
+            # Write directly to disk
+            self._wav_writer.writeframes(audio)
+
+    def stop(self) -> None:
+        if self._wav_writer is None:
+            return
+
+        if self._ring_buffer is not None:
+            # Write all audio now and reset buffer
+            self._wav_writer.writeframes(self._ring_buffer.getvalue())
+            self._ring_buffer = RingBuffer(self._ring_buffer.maxlen)
+
+        self._wav_writer.close()
+        self._wav_writer = None
+
+        _LOGGER.debug("Stopped recording to %s", self._wav_path)
+        self._wav_path = None