move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 70 insertions, 0 deletions

diff --git a/include/openbsc/trau_mux.h b/include/openbsc/trau_mux.h
new file mode 100644
index 000000000..75c359b56
--- /dev/null
+++ b/include/openbsc/trau_mux.h
@@ -0,0 +1,70 @@
+/* Simple TRAU frame reflector to route voice calls */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/* The "TRAU mux map" defines which particular 16kbit sub-slot (in which E1
+ * timeslot on which E1 interface) should be directly muxed to which other 
+ * sub-slot.  Entries in the mux map are always bi-directional. 
+ *
+ * The idea of all this is to directly switch voice channels in the BSC
+ * from one phone to another.  We do this right now since we don't support
+ * any external interface for voice channels, and in the future as an
+ * optimization to routing them externally.
+ */
+
+#include <stdint.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/mncc.h>
+
+struct decoded_trau_frame;
+
+/* map a TRAU mux map entry */
+int trau_mux_map(const struct gsm_e1_subslot *src,
+		 const struct gsm_e1_subslot *dst);
+int trau_mux_map_lchan(const struct gsm_lchan *src,	
+			const struct gsm_lchan *dst);
+
+/* unmap a TRAU mux map entry */
+int trau_mux_unmap(const struct gsm_e1_subslot *ss, uint32_t callref);
+
+/* we get called by subchan_demux */
+int trau_mux_input(struct gsm_e1_subslot *src_e1_ss,
+		   const uint8_t *trau_bits, int num_bits);
+
+/* add a trau receiver */
+int trau_recv_lchan(struct gsm_lchan *lchan, uint32_t callref);
+
+/* send trau from application */
+int trau_send_frame(struct gsm_lchan *lchan, struct gsm_data_frame *frame);
+
+/* switch trau muxer to new lchan */
+int switch_trau_mux(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan);
+
+/* callback invoked if we receive TRAU frames */
+int subch_cb(struct subch_demux *dmx, int ch, uint8_t *data, int len, void *_priv);
+
+/* TRAU frame transcoding */
+struct msgb *trau_decode_fr(uint32_t callref,
+	const struct decoded_trau_frame *tf);
+struct msgb *trau_decode_efr(uint32_t callref,
+	const struct decoded_trau_frame *tf);
+void trau_encode_fr(struct decoded_trau_frame *tf,
+	const unsigned char *data);
+void trau_encode_efr(struct decoded_trau_frame *tf,
+	const unsigned char *data);