diff options
author | Max <msuraev@sysmocom.de> | 2016-06-13 11:33:43 +0200 |
---|---|---|
committer | Harald Welte <laforge@gnumonks.org> | 2016-06-14 10:19:13 +0000 |
commit | a10ac248c6b6efe3f1fa1fd85331b32e7941c981 (patch) | |
tree | f32afe75d05b50725fe01429cb73cf94532517c1 /src/osmo-bts-sysmo/tch.c | |
parent | 60970056c87180c88539fcc6e3b0ba72e0f3d674 (diff) |
DTXu: mark beginning of speech burst in RTP
Set Marker bit in RTP header to mark the beginning of talkspurt.
Change-Id: I3dd70ad8ff94356e3c3cc5458255f6c23534783e
Related: OS#1562
Diffstat (limited to 'src/osmo-bts-sysmo/tch.c')
-rw-r--r-- | src/osmo-bts-sysmo/tch.c | 50 |
1 files changed, 44 insertions, 6 deletions
diff --git a/src/osmo-bts-sysmo/tch.c b/src/osmo-bts-sysmo/tch.c index 07a0efb2..a391fcca 100644 --- a/src/osmo-bts-sysmo/tch.c +++ b/src/osmo-bts-sysmo/tch.c @@ -91,7 +91,8 @@ void osmo_nibble_shift_left_unal(uint8_t *out, const uint8_t *in, } -static struct msgb *l1_to_rtppayload_fr(uint8_t *l1_payload, uint8_t payload_len) +static struct msgb *l1_to_rtppayload_fr(uint8_t *l1_payload, uint8_t payload_len, + struct gsm_lchan *lchan) { struct msgb *msg; uint8_t *cur; @@ -116,6 +117,13 @@ static struct msgb *l1_to_rtppayload_fr(uint8_t *l1_payload, uint8_t payload_len cur[0] |= 0xD0; #endif /* USE_L1_RTP_MODE */ + if (osmo_fr_check_sid(l1_payload, payload_len)) + lchan->tch.ul_sid = true; + else if (lchan->tch.ul_sid) { + lchan->tch.ul_sid = false; + lchan->rtp_tx_marker = true; + } + return msg; } @@ -142,7 +150,9 @@ static int rtppayload_to_l1_fr(uint8_t *l1_payload, const uint8_t *rtp_payload, } #if defined(L1_HAS_EFR) && defined(USE_L1_RTP_MODE) -static struct msgb *l1_to_rtppayload_efr(uint8_t *l1_payload, uint8_t payload_len) +static struct msgb *l1_to_rtppayload_efr(uint8_t *l1_payload, + uint8_t payload_len, + struct gsm_lchan *lchan) { struct msgb *msg; uint8_t *cur; @@ -166,6 +176,17 @@ static struct msgb *l1_to_rtppayload_efr(uint8_t *l1_payload, uint8_t payload_le cur[0] |= 0xC0; #endif /* USE_L1_RTP_MODE */ + enum osmo_amr_type ft; + enum osmo_amr_quality bfi; + uint8_t cmr; + int8_t sti, cmi; + osmo_amr_rtp_dec(l1_payload, payload_len, &cmr, &cmi, &ft, &bfi, &sti); + if (ft == AMR_GSM_EFR_SID) + lchan->tch.ul_sid = true; + else if (lchan->tch.ul_sid) { + lchan->tch.ul_sid = false; + lchan->rtp_tx_marker = true; + } return msg; } @@ -184,7 +205,8 @@ static int rtppayload_to_l1_efr(uint8_t *l1_payload, const uint8_t *rtp_payload, #warning No EFR support in L1 #endif /* L1_HAS_EFR */ -static struct msgb *l1_to_rtppayload_hr(uint8_t *l1_payload, uint8_t payload_len) +static struct msgb *l1_to_rtppayload_hr(uint8_t *l1_payload, uint8_t payload_len, + struct gsm_lchan *lchan) { struct msgb *msg; uint8_t *cur; @@ -207,6 +229,13 @@ static struct msgb *l1_to_rtppayload_hr(uint8_t *l1_payload, uint8_t payload_len osmo_revbytebits_buf(cur, GSM_HR_BYTES); #endif /* USE_L1_RTP_MODE */ + if (osmo_hr_check_sid(l1_payload, payload_len)) + lchan->tch.ul_sid = true; + else if (lchan->tch.ul_sid) { + lchan->tch.ul_sid = false; + lchan->rtp_tx_marker = true; + } + return msg; } @@ -525,6 +554,15 @@ int l1if_tch_rx(struct gsm_bts_trx *trx, uint8_t chan_nr, struct msgb *l1p_msg) lchan->type != GSM_LCHAN_TCH_F) goto err_payload_match; break; + case GsmL1_TchPlType_Amr_Onset: + if (lchan->type != GSM_LCHAN_TCH_H && + lchan->type != GSM_LCHAN_TCH_F) + goto err_payload_match; + /* according to 3GPP TS 26.093 ONSET frames precede the first + speech frame of a speech burst - set the marker for next RTP + frame and drop last SID */ + lchan->rtp_tx_marker = true; + break; default: LOGP(DL1C, LOGL_NOTICE, "%s Rx Payload Type %s is unsupported\n", gsm_lchan_name(lchan), @@ -535,14 +573,14 @@ int l1if_tch_rx(struct gsm_bts_trx *trx, uint8_t chan_nr, struct msgb *l1p_msg) switch (payload_type) { case GsmL1_TchPlType_Fr: - rmsg = l1_to_rtppayload_fr(payload, payload_len); + rmsg = l1_to_rtppayload_fr(payload, payload_len, lchan); break; case GsmL1_TchPlType_Hr: - rmsg = l1_to_rtppayload_hr(payload, payload_len); + rmsg = l1_to_rtppayload_hr(payload, payload_len, lchan); break; #if defined(L1_HAS_EFR) && defined(USE_L1_RTP_MODE) case GsmL1_TchPlType_Efr: - rmsg = l1_to_rtppayload_efr(payload, payload_len); + rmsg = l1_to_rtppayload_efr(payload, payload_len, lchan); break; #endif case GsmL1_TchPlType_Amr: |