Pau Espin Pedrol | b2c6b38 | 2019-05-14 13:40:49 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| 6 | * |
| 7 | * Released under the terms of GNU General Public License, Version 2 or |
| 8 | * (at your option) any later version. |
| 9 | */ |
| 10 | |
| 11 | module OSMUX_Types { |
| 12 | |
| 13 | import from General_Types all; |
| 14 | |
| 15 | external function enc_OSMUX_PDU ( in OSMUX_PDU msg ) return octetstring |
| 16 | with { extension "prototype(convert) encode(RAW)" }; |
| 17 | external function dec_OSMUX_PDU ( in octetstring msg ) return OSMUX_PDU |
| 18 | with { extension "prototype(convert) decode(RAW)" }; |
| 19 | |
| 20 | type INT1 OsmuxCID (0 .. 255); |
| 21 | |
| 22 | type enumerated OsmuxFT { |
| 23 | OSMUX_FT_LAPD, |
| 24 | OSMUX_FT_AMR, |
| 25 | OSMUX_FT_DUMMY |
| 26 | }; |
| 27 | |
| 28 | type record Osmux_AMR_header { |
| 29 | BIT1 marker, |
| 30 | INT2b ft, |
| 31 | INT3b ctr, |
| 32 | BIT1 amr_f, |
| 33 | BIT1 amr_q, |
| 34 | INT1 seq, |
| 35 | OsmuxCID cid, |
| 36 | INT4b amr_ft, |
| 37 | INT4b amr_cmr |
| 38 | } with { |
| 39 | variant "FIELDORDER(msb)" |
| 40 | } |
| 41 | |
| 42 | type record PDU_Osmux_AMR { |
| 43 | Osmux_AMR_header header, |
| 44 | octetstring data |
| 45 | } with { |
| 46 | variant "FIELDORDER(msb)" |
| 47 | }; |
| 48 | |
| 49 | type record PDU_Osmux_DUMMY { |
| 50 | Osmux_AMR_header header, |
| 51 | octetstring data |
| 52 | } with { |
| 53 | variant "FIELDORDER(msb)" |
| 54 | }; |
| 55 | |
| 56 | type record Osmux_session_par { |
| 57 | integer id optional, |
| 58 | charstring local_address optional, |
| 59 | integer local_port optional, |
| 60 | charstring dest_address optional, |
| 61 | integer dest_port optional |
| 62 | } |
| 63 | |
| 64 | type record ASP_Osmux_Open_session { |
| 65 | Osmux_session_par session_id |
| 66 | } |
| 67 | |
| 68 | type record ASP_Osmux_Open_session_result { |
| 69 | Osmux_session_par session_id |
| 70 | } |
| 71 | |
| 72 | type record ASP_Osmux_Close_session { |
| 73 | Osmux_session_par session_id |
| 74 | } |
| 75 | |
| 76 | type union OSMUX_PDU { |
| 77 | PDU_Osmux_AMR osmux_amr, |
| 78 | PDU_Osmux_DUMMY osmux_dummy |
| 79 | } with { |
| 80 | variant "TAG ( |
| 81 | osmux_amr, header.ft = 1; |
| 82 | osmux_dummy, header.ft = 2; |
| 83 | )" |
| 84 | }; |
| 85 | |
| 86 | |
| 87 | /* AMR voice frame type identifiers |
| 88 | * See also 3GPP TS 26.101, Table 1a: Interpretation of Frame Type, Mode |
| 89 | * Indication and Mode Request fields */ |
| 90 | type enumerated AMRFT { |
| 91 | AMR_FT_0, /* 4.75 */ |
| 92 | AMR_FT_1, /* 5.15 */ |
| 93 | AMR_FT_2, /* 5.90 */ |
| 94 | AMR_FT_3, /* 6.70 */ |
| 95 | AMR_FT_4, /* 7.40 */ |
| 96 | AMR_FT_5, /* 7.95 */ |
| 97 | AMR_FT_6, /* 10.2 */ |
| 98 | AMR_FT_7, /* 12.2 */ |
| 99 | AMR_FT_SID /* SID */ |
| 100 | }; |
| 101 | |
| 102 | /* AMR voice frame length (in bytes, rounded), |
| 103 | * See also RFC 3267, chapter 3.6 */ |
| 104 | const integer c_AMRFT_len[9] := {12, 13, 15, 17, 19, 20, 26, 31, 5}; |
| 105 | |
| 106 | function f_amrft_payload_len(INT4b amr_ft) return integer { |
| 107 | return c_AMRFT_len[amr_ft]; |
| 108 | } |
| 109 | |
| 110 | } with { encode "RAW"} |