111 lines
2.6 KiB
Plaintext
111 lines
2.6 KiB
Plaintext
/*
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* (C) 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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* All rights reserved.
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*
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* Author: Pau Espin Pedrol <pespin@sysmocom.de>
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*
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* Released under the terms of GNU General Public License, Version 2 or
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* (at your option) any later version.
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*/
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module OSMUX_Types {
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import from General_Types all;
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external function enc_OSMUX_PDU ( in OSMUX_PDU msg ) return octetstring
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with { extension "prototype(convert) encode(RAW)" };
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external function dec_OSMUX_PDU ( in octetstring msg ) return OSMUX_PDU
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with { extension "prototype(convert) decode(RAW)" };
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type INT1 OsmuxCID (0 .. 255);
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type enumerated OsmuxFT {
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OSMUX_FT_LAPD,
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OSMUX_FT_AMR,
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OSMUX_FT_DUMMY
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};
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type record Osmux_AMR_header {
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BIT1 marker,
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INT2b ft,
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INT3b ctr,
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BIT1 amr_f,
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BIT1 amr_q,
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INT1 seq,
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OsmuxCID cid,
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INT4b amr_ft,
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INT4b amr_cmr
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} with {
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variant "FIELDORDER(msb)"
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}
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type record PDU_Osmux_AMR {
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Osmux_AMR_header header,
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octetstring data
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} with {
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variant "FIELDORDER(msb)"
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};
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type record PDU_Osmux_DUMMY {
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Osmux_AMR_header header,
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octetstring data
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} with {
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variant "FIELDORDER(msb)"
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};
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type record Osmux_session_par {
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integer id optional,
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charstring local_address optional,
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integer local_port optional,
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charstring dest_address optional,
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integer dest_port optional
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}
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type record ASP_Osmux_Open_session {
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Osmux_session_par session_id
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}
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type record ASP_Osmux_Open_session_result {
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Osmux_session_par session_id
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}
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type record ASP_Osmux_Close_session {
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Osmux_session_par session_id
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}
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type union OSMUX_PDU {
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PDU_Osmux_AMR osmux_amr,
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PDU_Osmux_DUMMY osmux_dummy
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} with {
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variant "TAG (
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osmux_amr, header.ft = 1;
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osmux_dummy, header.ft = 2;
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)"
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};
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/* AMR voice frame type identifiers
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* See also 3GPP TS 26.101, Table 1a: Interpretation of Frame Type, Mode
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* Indication and Mode Request fields */
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type enumerated AMRFT {
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AMR_FT_0, /* 4.75 */
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AMR_FT_1, /* 5.15 */
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AMR_FT_2, /* 5.90 */
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AMR_FT_3, /* 6.70 */
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AMR_FT_4, /* 7.40 */
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AMR_FT_5, /* 7.95 */
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AMR_FT_6, /* 10.2 */
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AMR_FT_7, /* 12.2 */
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AMR_FT_SID /* SID */
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};
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/* AMR voice frame length (in bytes, rounded),
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* See also RFC 3267, chapter 3.6 */
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const integer c_AMRFT_len[9] := {12, 13, 15, 17, 19, 20, 26, 31, 5};
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function f_amrft_payload_len(INT4b amr_ft) return integer {
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return c_AMRFT_len[amr_ft];
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}
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} with { encode "RAW"}
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