adding missing audio buffer fix

CHANGELOG.md

@@ -31,6 +31,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed an issue where `OpenAIRealtimeBetaLLMService` function calling resulted
   in an error.
 
+- Fixed an issue in `AudioBufferProcessor` where the last audio buffer was not
+  being processed, in cases where the `_user_audio_buffer` was smaller than the
+  buffer size.
+
 ### Performance
 
 - Replaced audio resampling library `resampy` with `soxr`. Resampling a 2:21s

src/pipecat/processors/audio/audio_buffer_processor.py

@@ -9,6 +9,7 @@ from pipecat.frames.frames import (
     Frame,
     InputAudioRawFrame,
     OutputAudioRawFrame,
+    EndFrame,
 )
 from pipecat.processors.frame_processor import FrameDirection, FrameProcessor
 
@@ -86,6 +87,9 @@ class AudioBufferProcessor(FrameProcessor):
         if self._buffer_size > 0 and len(self._user_audio_buffer) > self._buffer_size:
             await self._call_on_audio_data_handler()
 
+        if isinstance(frame, EndFrame):
+            await self._call_on_audio_data_handler()
+
         await self.push_frame(frame, direction)
 
     async def _call_on_audio_data_handler(self):