From e7cdcb426d0c23de8582946190aa244a27a46fe7 Mon Sep 17 00:00:00 2001
From: "Joshua M. Doe" <oss@nvl.army.mil>
Date: Tue, 17 Jul 2018 15:10:06 -0400
Subject: [PATCH] kayasrc: add exposure-time property

---
 sys/kaya/gstkayasrc.c | 39 ++++++++++++++++++++++++++++++++++++++-
 sys/kaya/gstkayasrc.h |  2 ++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/sys/kaya/gstkayasrc.c b/sys/kaya/gstkayasrc.c
index 9aa8196..eced01d 100644
--- a/sys/kaya/gstkayasrc.c
+++ b/sys/kaya/gstkayasrc.c
@@ -83,7 +83,8 @@ enum
   PROP_NUM_CAPTURE_BUFFERS,
   PROP_TIMEOUT,
   PROP_PROJECT_FILE,
-  PROP_XML_FILE
+  PROP_XML_FILE,
+  PROP_EXPOSURE_TIME
 };
 
 #define DEFAULT_PROP_INTERFACE_INDEX 0
@@ -92,6 +93,7 @@ enum
 #define DEFAULT_PROP_TIMEOUT 1000
 #define DEFAULT_PROP_PROJECT_FILE NULL
 #define DEFAULT_PROP_XML_FILE NULL
+#define DEFAULT_PROP_EXPOSURE_TIME 0
 
 /* pad templates */
 
@@ -176,6 +178,12 @@ gst_kayasrc_class_init (GstKayaSrcClass * klass)
           DEFAULT_PROP_XML_FILE,
           (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
               GST_PARAM_MUTABLE_READY)));
+  g_object_class_install_property (G_OBJECT_CLASS (klass),
+      PROP_EXPOSURE_TIME, g_param_spec_float ("exposure-time",
+          "Exposure time (us)",
+          "Sets the exposure time in microseconds",
+          0, G_MAXFLOAT, DEFAULT_PROP_EXPOSURE_TIME,
+          G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE));
 }
 
 static void
@@ -226,6 +234,7 @@ gst_kayasrc_init (GstKayaSrc * src)
   src->timeout = DEFAULT_PROP_TIMEOUT;
   src->project_file = DEFAULT_PROP_PROJECT_FILE;
   src->xml_file = DEFAULT_PROP_PROJECT_FILE;
+  src->exposure_time = DEFAULT_PROP_EXPOSURE_TIME;
 
   src->queue = g_async_queue_new ();
   src->caps = NULL;
@@ -236,6 +245,24 @@ gst_kayasrc_init (GstKayaSrc * src)
   gst_kayasrc_cleanup (src);
 }
 
+static void
+gst_kayasrc_get_exposure_time (GstKayaSrc * src)
+{
+  if (src->cam_handle != INVALID_CAMHANDLE) {
+    src->exposure_time =
+        KYFG_GetCameraValueFloat (src->cam_handle, "ExposureTime");
+  }
+}
+
+static void
+gst_kayasrc_set_exposure_time (GstKayaSrc * src)
+{
+  if (src->cam_handle != INVALID_CAMHANDLE) {
+    KYFG_SetCameraValueFloat (src->cam_handle, "ExposureTime",
+        src->exposure_time);
+  }
+}
+
 void
 gst_kayasrc_set_property (GObject * object, guint property_id,
     const GValue * value, GParamSpec * pspec)
@@ -265,6 +292,10 @@ gst_kayasrc_set_property (GObject * object, guint property_id,
       g_free (src->xml_file);
       src->xml_file = g_value_dup_string (value);
       break;
+    case PROP_EXPOSURE_TIME:
+      src->exposure_time = g_value_get_float (value);
+      gst_kayasrc_set_exposure_time (src);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
       break;
@@ -299,6 +330,10 @@ gst_kayasrc_get_property (GObject * object, guint property_id,
     case PROP_XML_FILE:
       g_value_set_string (value, src->xml_file);
       break;
+    case PROP_EXPOSURE_TIME:
+      gst_kayasrc_get_exposure_time (src);
+      g_value_set_float (value, src->exposure_time);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
       break;
@@ -435,6 +470,8 @@ gst_kayasrc_start (GstBaseSrc * bsrc)
   }
   src->cam_handle = cam_handles[src->device_index];
 
+  gst_kayasrc_set_exposure_time (src);
+
   ret =
       KYFG_CameraCallbackRegister (src->cam_handle, gst_kayasrc_stream_callback,
       src);
diff --git a/sys/kaya/gstkayasrc.h b/sys/kaya/gstkayasrc.h
index ed50229..8ef8ed2 100644
--- a/sys/kaya/gstkayasrc.h
+++ b/sys/kaya/gstkayasrc.h
@@ -32,6 +32,7 @@ G_BEGIN_DECLS
 #define GST_IS_KAYA_SRC(obj)   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_KAYA_SRC))
 #define GST_IS_KAYA_SRC_CLASS(obj)   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_KAYA_SRC))
 
+
 typedef struct _GstKayaSrc GstKayaSrc;
 typedef struct _GstKayaSrcClass GstKayaSrcClass;
 
@@ -53,6 +54,7 @@ struct _GstKayaSrc
   gint timeout;
   gchar *project_file;
   gchar *xml_file;
+  gfloat exposure_time;
 
   gboolean acquisition_started;
   gboolean stop_requested;