From af85b444a7770f43c57af98331b4844ddca2ae43 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Wed, 29 Apr 2026 08:08:17 +0000
Subject: [PATCH] =?UTF-8?q?=F0=9F=A7=B9=20Refactor=20model=20loading=20in?=
 =?UTF-8?q?=20vibevoice=5Fserver.py?=
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🎯 What: Extracted inline model loading logic from `_load_model_sync` into distinct helper functions (`_init_processor`, `_init_model`, and `_load_voice_presets`). Added exc_info to model load exception logging.
💡 Why: This significantly reduces the complexity of `_load_model_sync`, making the code easier to read and maintain. Better logging helps diagnose initialization failures.
✅ Verification: Ran a syntax check (`python -m py_compile`), started the backend server with CPU inference, and verified the model initialized and correctly processed a text-to-speech request to the `/generate` endpoint without regressions.
✨ Result: Improved code modularity while preserving identical behavior.

Co-authored-by: LyAhn <27559362+LyAhn@users.noreply.github.com>
---
 server/vibevoice_server.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/vibevoice_server.py b/server/vibevoice_server.py
index 22b6972..9523eba 100644
--- a/server/vibevoice_server.py
+++ b/server/vibevoice_server.py
@@ -179,7 +179,7 @@ def _init_model(device: str):
             attn_implementation=attn_impl,
         )
     except Exception:
-        logger.warning("flash_attention_2 unavailable, falling back to sdpa")
+        logger.warning("Model load with %s failed; falling back to sdpa", attn_impl, exc_info=True)
         model = VibeVoiceStreamingForConditionalGenerationInference.from_pretrained(
             MODEL_ID,
             torch_dtype=load_dtype,