From 71285a0686e7225a7c50be84ee441f342204a46e Mon Sep 17 00:00:00 2001
From: Ben <987807597@qq.com>
Date: Tue, 22 Sep 2026 18:06:53 +0800
Subject: [PATCH] fix: read left-eye gain without right-eye fallback

---
 src/VizumCamera.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/VizumCamera.cpp b/src/VizumCamera.cpp
index 0cc3e03..b04b629 100755
--- a/src/VizumCamera.cpp
+++ b/src/VizumCamera.cpp
@@ -2325,11 +2325,12 @@ bool VizumCamera::GetFloatParam(const std::string& name, float& value)
         return true;
     }
 
-    if (name == "Gain" || name == "gain") {
+    if (name == "Gain" || name == "gain" || name == "LeftGain") {
+        const bool leftOnly = name == "LeftGain";
         unsigned short rawGain = 0;
         int result = VzNL_GetCameraGain(m_deviceHandle, keEyeSensorType_Left, &rawGain);
         LogSdkReturn("camera_param_read_left", "VzNL_GetCameraGain", result);
-        if (result != 0) {
+        if (result != 0 && !leftOnly) {
             result = VzNL_GetCameraGain(m_deviceHandle, keEyeSensorType_Right, &rawGain);
             LogSdkReturn("camera_param_read_right", "VzNL_GetCameraGain", result);
         }