Implement adaptive frame dropping (#10)

- Implement adaptive frame dropping to prevent latency from accumulating
- small packets are dropped and a crossfade is used to hide the dropping.
- still audible in some situations

Co-authored-by: pstruebi <struebin.patrick.com>
Reviewed-on: https://gitea.pstruebi.xyz/auracaster/bumble-auracast/pulls/10

src/auracast/auracast_config.py

@@ -40,6 +40,8 @@ class AuracastGlobalConfig(BaseModel):
     # so receivers may render earlier than the presentation delay for lower latency.
     immediate_rendering: bool = False
     assisted_listening_stream: bool = False
+    # Adaptive frame dropping: discard sub-frame samples when buffer exceeds threshold
+    enable_adaptive_frame_dropping: bool = False
 
 # "Audio input. "
 # "'device' -> use the host's default sound input device, "