static int add_telev_codec(struct audio *a)
{
struct sdp_media *m = stream_sdpmedia(audio_strm(a));
struct sdp_format *sf;
int err;
/* Use payload-type 101 if available, for CiscoGW interop */
err = sdp_format_add(&sf, m, false, (!sdp_media_lformat(m, 101)) ? "101" : NULL, telev_rtpfmt, TELEV_SRATE, 1, NULL, NULL, NULL, false, "0-15");
if (err) return err;
a->rx.pt_tel = sf->pt;
return err;
}
static int pt_handler(struct audio *a, uint8_t pt_old, uint8_t pt_new, void *user_data)
{
const struct sdp_format *lc;
lc = sdp_media_lformat(stream_sdpmedia(a->strm), pt_new);
if (!lc) return ENOENT;
if (pt_old != (uint8_t)-1) {
re_printf("Audio decoder changed payload" " %u -> %u\n", pt_old, pt_new);
}
a->rx.pt = pt_new;
return audio_decoder_set(a, lc->data, lc->pt, lc->params, user_data);
}
/* Handle incoming stream data from the network */
static void stream_recv_handler(const struct rtp_header *hdr,
struct mbuf *mb, void *arg)
{
struct audio *a = arg;
struct aurx *rx = &a->rx;
int err;
if (!mb)
goto out;
/* Telephone event? */
if (hdr->pt != rx->pt) {
const struct sdp_format *fmt;
fmt = sdp_media_lformat(stream_sdpmedia(a->strm), hdr->pt);
if (fmt && !str_casecmp(fmt->name, "telephone-event")) {
handle_telev(a, mb);
return;
}
}
/* Comfort Noise (CN) as of RFC 3389 */
if (PT_CN == hdr->pt)
return;
/* Audio payload-type changed? */
/* XXX: this logic should be moved to stream.c */
if (hdr->pt != rx->pt) {
err = pt_handler(a, rx->pt, hdr->pt);
if (err)
return;
}
out:
(void)aurx_stream_decode(&a->rx, mb);
}
