Index: /trunk/libfreebob/src/libstreaming/cyclecounter.h
===================================================================
--- /trunk/libfreebob/src/libstreaming/cyclecounter.h (revision 364)
+++ /trunk/libfreebob/src/libstreaming/cyclecounter.h (revision 364)
@@ -0,0 +1,62 @@
+/* $Id$ */
+
+/*
+ *   FreeBob Streaming API
+ *   FreeBob = Firewire (pro-)audio for linux
+ *
+ *   http://freebob.sf.net
+ *
+ *   Copyright (C) 2005,2006,2007 Pieter Palmers <pieterpalmers@users.sourceforge.net>
+ *
+ *   This program is free software {} you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation {} either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program {} if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * 
+ *
+ */
+ 
+/* Definitions and utility macro's to handle the ISO cyclecounter */
+
+#ifndef __CYCLECOUNTER_H__
+#define __CYCLECOUNTER_H__
+
+#define CSR_CYCLE_TIME            0x200
+#define CSR_REGISTER_BASE  0xfffff0000000ULL
+
+#define CYCLES_PER_SECOND   8000
+#define TICKS_PER_CYCLE     3072
+#define TICKS_PER_SECOND   (CYCLES_PER_SECOND * TICKS_PER_CYCLE)
+#define TICKS_PER_USEC     (TICKS_PER_SECOND/1000000.0)
+
+#define USECS_PER_TICK     (1.0/TICKS_PER_USEC)
+
+#define CYCLE_COUNTER_GET_SECS(x)   ((((x) & 0xFE000000) >> 25))
+#define CYCLE_COUNTER_GET_CYCLES(x) ((((x) & 0x01FFF000) >> 12))
+#define CYCLE_COUNTER_GET_OFFSET(x)  ((((x) & 0x00000FFF)))
+#define CYCLE_COUNTER_TO_TICKS(x) ((CYCLE_COUNTER_GET_SECS(x)   * TICKS_PER_SECOND) +\
+                                   (CYCLE_COUNTER_GET_CYCLES(x) * TICKS_PER_CYCLE ) +\
+                                   (CYCLE_COUNTER_GET_OFFSET(x)            ))
+                                   
+// non-efficient versions, to be avoided in critical code
+#define TICKS_TO_SECS(x) ((x)/TICKS_PER_SECOND)
+#define TICKS_TO_CYCLES(x) (((x)/TICKS_PER_CYCLE) % CYCLES_PER_SECOND)
+#define TICKS_TO_OFFSET(x) (((x)%TICKS_PER_CYCLE))
+
+#define CYCLE_COUNTER_UNWRAP_TICKS(x) ((x) \
+                                       + (127 * TICKS_PER_SECOND) \
+                                       + (CYCLES_PER_SECOND * TICKS_PER_CYCLE) \
+                                       + (TICKS_PER_CYCLE) \
+                                      )
+
+#endif // __CYCLECOUNTER_H__