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Fix Unbounded _audio_buffer growth.

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Xin Wang
2026-02-06 08:11:14 +08:00
parent 605968a639
commit 26458faa6c
1 changed files with 5 additions and 0 deletions
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5
core/duplex_pipeline.py
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@@ -108,6 +108,8 @@ class DuplexPipeline:
self._is_bot_speaking = False self._is_bot_speaking = False
self._current_turn_task: Optional[asyncio.Task] = None self._current_turn_task: Optional[asyncio.Task] = None
self._audio_buffer: bytes = b"" self._audio_buffer: bytes = b""
max_buffer_seconds = settings.max_audio_buffer_seconds if hasattr(settings, "max_audio_buffer_seconds") else 30
self._max_audio_buffer_bytes = int(settings.sample_rate * 2 * max_buffer_seconds)
self._last_vad_status: str = "Silence" self._last_vad_status: str = "Silence"
# Interruption handling # Interruption handling
@@ -263,6 +265,9 @@ class DuplexPipeline:
# 3. Buffer audio for ASR # 3. Buffer audio for ASR
if vad_status == "Speech" or self.conversation.state == ConversationState.LISTENING: if vad_status == "Speech" or self.conversation.state == ConversationState.LISTENING:
self._audio_buffer += pcm_bytes self._audio_buffer += pcm_bytes
if len(self._audio_buffer) > self._max_audio_buffer_bytes:
# Keep only the most recent audio to cap memory usage
self._audio_buffer = self._audio_buffer[-self._max_audio_buffer_bytes:]
await self.asr_service.send_audio(pcm_bytes) await self.asr_service.send_audio(pcm_bytes)
# For SiliconFlow ASR, trigger interim transcription periodically # For SiliconFlow ASR, trigger interim transcription periodically