FreeCalypso > hg > themwi-rtp-lib
annotate src/endp_create.c @ 42:334d883b96ba
twrtp_jibuf_create: make config argument const
While this config structure is not a constant in the mathematical
sense of the term (it is expected that vty config changes may happen
while twjit instance is alive), twjit functions never write to it,
only read, hence it is 'const' in the not-quite-mathematical C-standard
sense.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Fri, 20 Dec 2024 22:47:20 +0000 |
| parents | 781f491f20dd |
| children | 8cdfef36d9db |
| rev | line source |
|---|---|
| 19 | 1 /* |
| 2 * Create and destroy functions for twrtp_endp. | |
| 3 */ | |
| 4 | |
| 5 #include <stdint.h> | |
| 6 #include <stdbool.h> | |
|
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7 #include <stdlib.h> |
| 19 | 8 |
| 9 #include <osmocom/core/talloc.h> | |
| 10 #include <osmocom/core/osmo_io.h> | |
| 11 #include <osmocom/core/utils.h> | |
| 12 | |
| 13 #include <themwi/rtp/endp.h> | |
| 14 #include <themwi/rtp/twjit.h> | |
|
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781f491f20dd
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Mychaela Falconia <falcon@freecalypso.org>
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15 #include <themwi/rtp/rtp_basic_hdr.h> |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16 #include <themwi/rtp/rtcp_defs.h> |
| 19 | 17 #include "endp_internal.h" |
| 18 | |
|
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
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19 /* We need to know maximum expected sizes of RTP and RTCP Rx packets |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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20 * for osmo_io msgb allocation. For RTP, the largest packet size in |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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21 * 3GPP and IP-PSTN applications is 176 bytes: 12 bytes of RTP header |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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22 * plus 160 bytes of payload for 20 ms of uncompressed G.711 audio |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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23 * or CSData. Of course there may be other applications that use |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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24 * larger RTP packets, in which case we may have to add an API function |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
25 * that overrides our default msgb alloc size setting - but let's |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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26 * cross that bridge if and when we actually have such users. |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
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27 * |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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28 * In case of RTCP, we fully process all received packets inside |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
29 * the present library, hence we can set osmo_io msgb alloc size |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
30 * based on what our RTCP Rx code can parse and make use of. Any |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
31 * additional RTCP Rx data, such as very long SDES strings, will |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
32 * simply be truncated at osmo_io level - but the subsequent parsing |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
33 * code will never get to those bits anyway. |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
34 */ |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
35 |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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36 #define MAX_RTP_RX_PACKET (sizeof(struct rtp_basic_hdr) + 160) |
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set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
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37 #define MAX_RTCP_RX_PACKET (sizeof(struct rtcp_sr_rr_hdr) + \ |
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781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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38 sizeof(struct rtcp_sr_block) + \ |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
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39 sizeof(struct rtcp_rr_block) * 31) |
|
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
40 |
| 19 | 41 struct twrtp_endp *twrtp_endp_create(void *ctx, |
| 42 struct twrtp_jibuf_config *config) | |
| 43 { | |
| 44 struct twrtp_endp *endp; | |
| 45 | |
| 46 endp = talloc_zero(ctx, struct twrtp_endp); | |
| 47 if (!endp) | |
| 48 return NULL; | |
| 49 | |
| 50 endp->iofd_rtp = osmo_iofd_setup(endp, -1, NULL, | |
| 51 OSMO_IO_FD_MODE_RECVFROM_SENDTO, | |
| 52 &_twrtp_endp_iops_rtp, endp); | |
| 53 if (!endp->iofd_rtp) { | |
| 54 talloc_free(endp); | |
| 55 return NULL; | |
| 56 } | |
|
38
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
57 osmo_iofd_set_alloc_info(endp->iofd_rtp, MAX_RTP_RX_PACKET, 0); |
| 19 | 58 |
| 59 endp->iofd_rtcp = osmo_iofd_setup(endp, -1, NULL, | |
| 60 OSMO_IO_FD_MODE_RECVFROM_SENDTO, | |
| 61 &_twrtp_endp_iops_rtcp, endp); | |
| 62 if (!endp->iofd_rtcp) { | |
| 63 osmo_iofd_free(endp->iofd_rtp); | |
| 64 talloc_free(endp); | |
| 65 return NULL; | |
| 66 } | |
|
38
781f491f20dd
set sensible osmo_io msgb alloc sizes for RTP & RTCP Rx
Mychaela Falconia <falcon@freecalypso.org>
parents:
24
diff
changeset
|
67 osmo_iofd_set_alloc_info(endp->iofd_rtcp, MAX_RTCP_RX_PACKET, 0); |
| 19 | 68 |
| 69 endp->twjit = twrtp_jibuf_create(endp, config); | |
| 70 if (!endp->twjit) { | |
| 71 osmo_iofd_free(endp->iofd_rtp); | |
| 72 osmo_iofd_free(endp->iofd_rtcp); | |
| 73 talloc_free(endp); | |
| 74 return NULL; | |
| 75 } | |
| 76 | |
|
24
84d427017d2f
endp: implement RTP Tx
Mychaela Falconia <falcon@freecalypso.org>
parents:
19
diff
changeset
|
77 endp->tx.ssrc = random(); |
| 19 | 78 return endp; |
| 79 } | |
| 80 | |
| 81 void twrtp_endp_destroy(struct twrtp_endp *endp) | |
| 82 { | |
| 83 osmo_iofd_free(endp->iofd_rtp); | |
| 84 osmo_iofd_free(endp->iofd_rtcp); | |
| 85 twrtp_jibuf_destroy(endp->twjit); | |
| 86 talloc_free(endp); | |
| 87 } |