Add support for parsing SDP attributes, generating SDP attributes, and passing it through.

This support includes codecs such as H.263, H.264, SILK, and CELT. You are able to set up a call and have attribute information pass. This should help considerably with video calls.

Review: https://reviewboard.asterisk.org/r/2005/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370055 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 45 insertions, 0 deletions

diff --git a/main/format.c b/main/format.c
index 96afd3e18..2d37eb458 100644
--- a/main/format.c
+++ b/main/format.c
@@ -119,6 +119,51 @@ static int has_interface(const struct ast_format *format)
 	return 1;
 }
 
+int ast_format_sdp_parse(struct ast_format *format, const char *attributes)
+{
+	struct interface_ao2_wrapper *wrapper;
+	int res;
+
+	if (!(wrapper = find_interface(format))) {
+		return 0;
+	}
+
+	ao2_rdlock(wrapper);
+	if (!(wrapper->interface || !wrapper->interface->format_attr_sdp_parse)) {
+		ao2_unlock(wrapper);
+		ao2_ref(wrapper, -1);
+		return 0;
+	}
+
+	res = wrapper->interface->format_attr_sdp_parse(&format->fattr, attributes);
+
+	ao2_unlock(wrapper);
+	ao2_ref(wrapper, -1);
+
+	return res;
+}
+
+void ast_format_sdp_generate(const struct ast_format *format, unsigned int payload, struct ast_str **str)
+{
+	struct interface_ao2_wrapper *wrapper;
+
+	if (!(wrapper = find_interface(format))) {
+		return;
+	}
+
+	ao2_rdlock(wrapper);
+	if (!(wrapper->interface || !wrapper->interface->format_attr_sdp_generate)) {
+		ao2_unlock(wrapper);
+		ao2_ref(wrapper, -1);
+		return;
+	}
+
+	wrapper->interface->format_attr_sdp_generate(&format->fattr, payload, str);
+
+	ao2_unlock(wrapper);
+	ao2_ref(wrapper, -1);
+}
+
 /*! \internal
  * \brief set format attributes using an interface
  */