1 files changed, 154 insertions, 0 deletions
diff --git a/ext/raw1394/gst1394clock.c b/ext/raw1394/gst1394clock.c
new file mode 100644
index 0000000..0505c8c
--- /dev/null
+++ b/ext/raw1394/gst1394clock.c
@@ -0,0 +1,154 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ * Copyright (C) 2009      David Schleef <ds@schleef.org>
+ *
+ * gst1394clock.c: Clock for use by IEEE 1394 plugins
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gst1394clock.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_1394_clock_debug);
+#define GST_CAT_DEFAULT gst_1394_clock_debug
+
+static void gst_1394_clock_class_init (Gst1394ClockClass * klass);
+static void gst_1394_clock_init (Gst1394Clock * clock);
+
+static GstClockTime gst_1394_clock_get_internal_time (GstClock * clock);
+
+static GstSystemClockClass *parent_class = NULL;
+
+/* static guint gst_1394_clock_signals[LAST_SIGNAL] = { 0 }; */
+
+GType
+gst_1394_clock_get_type (void)
+{
+  static GType clock_type = 0;
+
+  if (!clock_type) {
+    static const GTypeInfo clock_info = {
+      sizeof (Gst1394ClockClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gst_1394_clock_class_init,
+      NULL,
+      NULL,
+      sizeof (Gst1394Clock),
+      4,
+      (GInstanceInitFunc) gst_1394_clock_init,
+      NULL
+    };
+
+    clock_type = g_type_register_static (GST_TYPE_SYSTEM_CLOCK, "Gst1394Clock",
+        &clock_info, 0);
+  }
+  return clock_type;
+}
+
+
+static void
+gst_1394_clock_class_init (Gst1394ClockClass * klass)
+{
+  GstClockClass *gstclock_class;
+
+  gstclock_class = (GstClockClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gstclock_class->get_internal_time = gst_1394_clock_get_internal_time;
+
+  GST_DEBUG_CATEGORY_INIT (gst_1394_clock_debug, "1394clock", 0, "1394clock");
+}
+
+static void
+gst_1394_clock_init (Gst1394Clock * clock)
+{
+  GST_OBJECT_FLAG_SET (clock, GST_CLOCK_FLAG_CAN_SET_MASTER);
+}
+
+/**
+ * gst_1394_clock_new:
+ * @name: the name of the clock
+ *
+ * Create a new #Gst1394Clock instance.
+ *
+ * Returns: a new #Gst1394Clock
+ */
+Gst1394Clock *
+gst_1394_clock_new (const gchar * name)
+{
+  Gst1394Clock *_1394clock =
+      GST_1394_CLOCK (g_object_new (GST_TYPE_1394_CLOCK, "name", name, NULL));
+
+  return _1394clock;
+}
+
+static GstClockTime
+gst_1394_clock_get_internal_time (GstClock * clock)
+{
+  Gst1394Clock *_1394clock;
+  GstClockTime result;
+  guint32 cycle_timer;
+  guint64 local_time;
+
+  _1394clock = GST_1394_CLOCK_CAST (clock);
+
+  if (_1394clock->handle != NULL) {
+    GST_OBJECT_LOCK (clock);
+    raw1394_read_cycle_timer (_1394clock->handle, &cycle_timer, &local_time);
+
+    if (cycle_timer < _1394clock->cycle_timer_lo) {
+      GST_LOG_OBJECT (clock, "overflow %u to %u",
+          _1394clock->cycle_timer_lo, cycle_timer);
+
+      _1394clock->cycle_timer_hi++;
+    }
+    _1394clock->cycle_timer_lo = cycle_timer;
+
+    /* get the seconds from the cycleSeconds counter */
+    result = (((((guint64) _1394clock->cycle_timer_hi) << 32) |
+            cycle_timer) >> 25) * GST_SECOND;
+    /* add the microseconds from the cycleCount counter */
+    result += (((cycle_timer >> 12) & 0x1fff) * 125) * GST_USECOND;
+
+    GST_LOG_OBJECT (clock, "result %" GST_TIME_FORMAT, GST_TIME_ARGS (result));
+    GST_OBJECT_UNLOCK (clock);
+  } else {
+    result = GST_CLOCK_TIME_NONE;
+  }
+
+  return result;
+}
+
+void
+gst_1394_clock_set_handle (Gst1394Clock * clock, raw1394handle_t handle)
+{
+  clock->handle = handle;
+  clock->cycle_timer_lo = 0;
+  clock->cycle_timer_hi = 0;
+}
+
+void
+gst_1394_clock_unset_handle (Gst1394Clock * clock)
+{
+  clock->handle = NULL;
+}