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

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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
This commit is contained in:
Joshua Colp
2012-07-13 16:49:40 +00:00
parent 2603707f30
commit a693fd1d87
6 changed files with 180 additions and 41 deletions
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25
res/res_format_attr_celt.c
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@@ -45,6 +45,29 @@ struct celt_attr {
unsigned int framesize;
};
static int celt_sdp_parse(struct ast_format_attr *format_attr, const char *attributes)
{
struct celt_attr *attr = (struct celt_attr *) format_attr;
unsigned int val;
if (sscanf(attributes, "framesize=%30u", &val) == 1) {
attr->framesize = val;
}
return 0;
}
static void celt_sdp_generate(const struct ast_format_attr *format_attr, unsigned int payload, struct ast_str **str)
{
struct celt_attr *attr = (struct celt_attr *) format_attr;
if (!attr->framesize) {
return;
}
ast_str_append(str, 0, "a=fmtp:%d framesize=%d\r\n", payload, attr->framesize);
}
static enum ast_format_cmp_res celt_cmp(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2)
{
struct celt_attr *attr1 = (struct celt_attr *) fattr1;
@@ -161,6 +184,8 @@ static struct ast_format_attr_interface celt_interface = {
.format_attr_set = celt_set,
.format_attr_isset = celt_isset,
.format_attr_get_val = celt_get_val,
.format_attr_sdp_parse = celt_sdp_parse,
.format_attr_sdp_generate = celt_sdp_generate,
};
static int load_module(void)