Add RTP support for EFR
This is just the minimal support to receive and send EFR codec
RTP frames.
We are missing the code to convert TRAU frames in EFR format!
diff --git a/openbsc/src/mncc.c b/openbsc/src/mncc.c
index a5efc73..f53b15d 100644
--- a/openbsc/src/mncc.c
+++ b/openbsc/src/mncc.c
@@ -83,7 +83,7 @@
{"MNCC_FRAME_DROP", 0x0202},
{"MNCC_LCHAN_MODIFY", 0x0203},
- {"GSM_TRAU_FRAME", 0x0300},
+ {"GSM_TCH_FRAME", 0x0300},
{NULL, 0} };
diff --git a/openbsc/src/rtp_proxy.c b/openbsc/src/rtp_proxy.c
index f9207d6..5513497 100644
--- a/openbsc/src/rtp_proxy.c
+++ b/openbsc/src/rtp_proxy.c
@@ -82,6 +82,7 @@
#define RTP_VERSION 2
#define RTP_PT_GSM_FULL 3
+#define RTP_PT_GSM_EFR 97
/* decode an rtp frame and create a new buffer with payload */
static int rtp_decode(struct msgb *msg, u_int32_t callref, struct msgb **data)
@@ -152,6 +153,9 @@
return -EINVAL;
}
break;
+ case RTP_PT_GSM_EFR:
+ msg_type = GSM_TCHF_FRAME_EFR;
+ break;
default:
DEBUGPC(DMUX, "received RTP frame with unknown payload "
"type %d\n", rtph->payload_type);
@@ -196,6 +200,11 @@
payload_len = 33;
duration = 160;
break;
+ case GSM_TCHF_FRAME_EFR:
+ payload_type = RTP_PT_GSM_EFR;
+ payload_len = 31;
+ duration = 160;
+ break;
default:
DEBUGPC(DMUX, "unsupported message type %d\n",
frame->msg_type);