diff --git a/sys/imperx/gstframelinksrc.c b/sys/imperx/gstframelinksrc.c
index ebe6d0c..c4c47bc 100644
--- a/sys/imperx/gstframelinksrc.c
+++ b/sys/imperx/gstframelinksrc.c
@@ -263,80 +263,6 @@ gst_framelinksrc_finalize (GObject * object)
   G_OBJECT_CLASS (gst_framelinksrc_parent_class)->finalize (object);
 }
 
-//static inline GstClockTime
-//gst_pixci_get_timestamp (GstFramelinkSrc * framelinksrc)
-//{
-//  ui32 dwParam;
-//  guint64 timestamp;
-//
-//  /* get time in microseconds from start of acquisition */
-//  /* TODO: check for rollover */
-//  PHX_ParameterGet (framelinksrc->hCamera, PHX_EVENTCOUNT, &dwParam);
-//  timestamp = (guint64) 1000 *dwParam;
-//
-//  if (framelinksrc->first_pixci_ts == GST_CLOCK_TIME_NONE) {
-//    framelinksrc->first_pixci_ts = timestamp;
-//  }
-//  return timestamp - framelinksrc->first_pixci_ts;
-//}
-
-/* Callback function to handle image capture events. */
-//void
-//phx_callback (tHandle hCamera, ui32 dwMask, void *pvParams)
-//{
-//  GstFramelinkSrc *framelinksrc = GST_FRAMELINK_SRC (pvParams);
-//  GstClockTime ct = gst_pixci_get_timestamp (framelinksrc);
-//  gboolean signal_create_func = FALSE;
-//  guint n;
-//
-//  g_mutex_lock (&framelinksrc->mutex);
-//
-//  /* Note that more than one interrupt can be sent, so no "else if" */
-//
-//  /* called when frame valid signal goes high */
-//  if (PHX_INTRPT_FRAME_START & dwMask) {
-//    /* FIXME: this will work until frames are dropped */
-//    n = framelinksrc->frame_start_count % framelinksrc->num_capture_buffers;
-//    framelinksrc->frame_start_times[n] = ct;
-//
-//    framelinksrc->frame_start_count++;
-//  }
-//
-//  /* called when frame valid signal goes low */
-//  if (PHX_INTRPT_FRAME_END & dwMask) {
-//    /* FIXME: this will work until frames are dropped */
-//    n = (framelinksrc->frame_end_count - 1) % framelinksrc->num_capture_buffers;
-//    framelinksrc->frame_end_times[n] = ct;
-//
-//    framelinksrc->frame_end_count++;
-//  }
-//
-//  if (PHX_INTRPT_BUFFER_READY & dwMask) {
-//    /* we have a buffer */
-//    framelinksrc->buffer_ready = TRUE;
-//    framelinksrc->buffer_ready_count++;
-//    signal_create_func = TRUE;
-//  }
-//
-//  if (PHX_INTRPT_TIMEOUT & dwMask) {
-//    /* TODO: we could offer to try and ABORT then re-START capture */
-//    framelinksrc->timeout_occurred = TRUE;
-//    signal_create_func = TRUE;
-//  }
-//
-//  if (PHX_INTRPT_FIFO_OVERFLOW & dwMask) {
-//    framelinksrc->fifo_overflow_occurred = TRUE;
-//    signal_create_func = TRUE;
-//  }
-//
-//
-//
-//  if (signal_create_func)
-//    g_cond_signal (&framelinksrc->cond);
-//  g_mutex_unlock (&framelinksrc->mutex);
-//  /* after unlocking, _create will check for these errors and copy data */
-//}
-
 static gboolean
 gst_framelinksrc_start (GstBaseSrc * bsrc)
 {