Expose saturation in JNI

Signed-off-by: Jade Turner <spacey-sooty@proton.me>

Author: spacey-sooty

include/libcamera_jni.hpp

@@ -96,6 +96,15 @@ JNIEXPORT jboolean JNICALL
 Java_org_photonvision_raspi_LibCameraJNI_setAutoExposure(
     JNIEnv *env, jclass, jlong, jboolean doAutoExposure);
 
+/*
+ * Class:     org_photonvision_raspi_LibCameraJNI
+ * Method:    setSaturation
+ * Signature: (I)Z
+ */
+JNIEXPORT jboolean JNICALL
+Java_org_photonvision_raspi_LibCameraJNI_setSaturation(JNIEnv *, jclass, jlong,
+                                                       jint);
+
 /*
  * Class:     org_photonvision_raspi_LibCameraJNI
  * Method:    setBrightness

src/libcamera_jni.cpp

@@ -227,19 +227,19 @@ Java_org_photonvision_raspi_LibCameraJNI_setThresholds
 
 /*
  * Class:     org_photonvision_raspi_LibCameraJNI
- * Method:    setExposure
+ * Method:    setSaturation
  * Signature: (JI)Z
  */
 JNIEXPORT jboolean JNICALL
-Java_org_photonvision_raspi_LibCameraJNI_setExposure
-  (JNIEnv *, jclass, jlong runner_, jint exposure)
+Java_org_photonvision_raspi_LibCameraJNI_setSaturation
+  (JNIEnv *, jclass, jlong runner_, jint saturation)
 {
     CameraRunner *runner = reinterpret_cast<CameraRunner *>(runner_);
     if (!runner) {
         return false;
     }
 
-    runner->cameraGrabber().cameraSettings().exposureTimeUs = exposure;
+    runner->cameraGrabber().cameraSettings().saturation = saturation;
     return true;
 }
 
@@ -261,6 +261,24 @@ Java_org_photonvision_raspi_LibCameraJNI_setAutoExposure
     return true;
 }
 
+/*
+ * Class:     org_photonvision_raspi_LibCameraJNI
+ * Method:    setExposure
+ * Signature: (JI)Z
+ */
+JNIEXPORT jboolean JNICALL
+Java_org_photonvision_raspi_LibCameraJNI_setExposure
+  (JNIEnv *, jclass, jlong runner_, jint exposure)
+{
+    CameraRunner *runner = reinterpret_cast<CameraRunner *>(runner_);
+    if (!runner) {
+        return false;
+    }
+
+    runner->cameraGrabber().cameraSettings().exposureTimeUs = exposure;
+    return true;
+}
+
 /*
  * Class:     org_photonvision_raspi_LibCameraJNI
  * Method:    setBrightness

src/main/java/org/photonvision/raspi/LibCameraJNI.java

@@ -114,6 +114,9 @@ public static native boolean setThresholds(
     // Exposure time, in microseconds
     public static native boolean setExposure(long r_ptr, int exposureUs);
 
+    // Saturation
+    public static native boolean setSaturation(long r_ptr, int saturation);
+
     // Set brightness on [-1, 1]
     public static native boolean setBrightness(long r_ptr, double brightness);