diff options
Diffstat (limited to 'openbsc/src/libmgcp/rtp_helper.c')
| -rw-r--r-- | openbsc/src/libmgcp/rtp_helper.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/openbsc/src/libmgcp/rtp_helper.c b/openbsc/src/libmgcp/rtp_helper.c index 2fc583f5e..feb3d591d 100644 --- a/openbsc/src/libmgcp/rtp_helper.c +++ b/openbsc/src/libmgcp/rtp_helper.c @@ -262,7 +262,9 @@ int rtp_compress(struct mgcp_rtp_compr_state *state, struct msgb *msg, reduced_hdr = msgb_put_struct(msg, struct reduced_rtp_hdr); reduced_hdr->endp = endp; - reduced_hdr->sequence_no = ++state->last_ts % UCHAR_MAX; + + state->last_ts = (state->last_ts + 1) % UCHAR_MAX; + reduced_hdr->sequence_no = state->last_ts; reduced_hdr->payloads = count; if (marker) @@ -285,6 +287,20 @@ int rtp_decompress(struct mgcp_rtp_compr_state *state, } rhdr = (struct reduced_rtp_hdr *) msg->l2h; + + /* check if the state is matching */ + /** + * We will need some simple state with a bit of history. We will start + * with last_ts == -1, then we initialize it to the expected ts, and + * when we get something we didn't expect we will need to guess if this + * is a late arrival (due re-ordering or such) or if that is just some + * packet loss and we continue. E.g. we need to check if the sequence_no + * is above or below our state... but as the counter wraps, e.g. if we + * wait for 512 but we get 2, we have jumped to the future... + * This will require some testing/simulation + */ +#warning "TODO: Deal with late arrivals, reset the state and accept late as new" + if (rhdr->type == 0) return read_compressed_slim(msg, rhdr, list, state); else if (rhdr->type == 1) |