H100/General: HAL for S/PDIF and refinement/bufixes in optical output powering/source selection.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11523 a1c6a512-1295-4272-9138-f99709370657

firmware/export/spdif.h

@@ -0,0 +1,36 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Michal Sevakis
+ * Based on the work of Thom Johansen
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef SPDIF_H
+#define SPDIF_H
+
+/* Initialize the S/PDIF driver */
+void spdif_init(void);
+/* Return the S/PDIF frequency in herz - unrounded */
+unsigned long spdif_measure_frequency(void);
+#ifdef HAVE_SPDIF_OUT
+/* Set the S/PDIF audio feed - Use AUDIO_SRC_* values -
+   will be off if not powered or !on */
+void spdif_set_output_source(int source, bool on);
+/* Return the last set S/PDIF audio source - literally the last value passed
+   to spdif_set_monitor regardless of power state */
+int spdif_get_output_source(bool *src_on);
+#endif /* HAVE_SPDIF_OUT */
+
+#endif /* SPDIF_H */