| /* |
| * (C) 2019-2022 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| * All rights reserved. |
| * |
| * Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| * |
| * Released under the terms of GNU General Public License, Version 2 or |
| * (at your option) any later version. |
| */ |
| |
| module AMR_Types { |
| |
| import from General_Types all; |
| import from Osmocom_Types all; |
| |
| /* AMR voice frame type identifiers |
| * See also 3GPP TS 26.101, Table 1a: Interpretation of Frame Type, Mode |
| * Indication and Mode Request fields */ |
| type enumerated AMRFT { |
| AMR_FT_0, /* 4.75 */ |
| AMR_FT_1, /* 5.15 */ |
| AMR_FT_2, /* 5.90 */ |
| AMR_FT_3, /* 6.70 */ |
| AMR_FT_4, /* 7.40 */ |
| AMR_FT_5, /* 7.95 */ |
| AMR_FT_6, /* 10.2 */ |
| AMR_FT_7, /* 12.2 */ |
| AMR_FT_SID /* SID */ |
| }; |
| |
| /* AMR voice frame length (in bytes, rounded), |
| * See also RFC 3267, chapter 3.6 */ |
| const integer c_AMRFT_len[9] := {12, 13, 15, 17, 19, 20, 26, 31, 5}; |
| |
| function f_amrft_payload_len(INT4b amr_ft) return integer { |
| return c_AMRFT_len[amr_ft]; |
| } |
| |
| const integer c_AMRFT_bits_len[9] := {95, 103, 118, 134, 148, 159, 204, 244, 39}; |
| |
| function f_amrft_payload_bits_len(INT4b amr_ft) return integer { |
| return c_AMRFT_bits_len[amr_ft]; |
| } |
| |
| type record RTP_AMR_Hdr { |
| uint4_t cmr, |
| BIT4 padding1, |
| BIT1 f, |
| uint4_t ft, |
| BIT1 q, |
| BIT2 padding2 |
| } with { variant "FIELDORDER(msb)" }; |
| |
| template (value) RTP_AMR_Hdr ts_RTP_AMR_Hdr(template (value) uint4_t cmr, |
| template (value) uint4_t ft, |
| template (value) BIT1 q := '1'B, |
| template (value) BIT1 f := '0'B) := { |
| cmr := cmr, |
| padding1 := '0000'B, |
| f := f, |
| ft := ft, |
| q := q, |
| padding2 := '00'B |
| } |
| external function enc_RTP_AMR_Hdr(in RTP_AMR_Hdr amr_hdr) return octetstring |
| with { extension "prototype(convert) encode(RAW)" }; |
| external function dec_RTP_AMR_Hdr(in octetstring stream) return RTP_AMR_Hdr |
| with { extension "prototype(convert) decode(RAW)" }; |
| |
| |
| type record RTP_AMR_BWE_Hdr { |
| uint4_t cmr, |
| BIT1 f, |
| uint4_t ft, |
| BIT1 q |
| } with { variant "FIELDORDER(msb)" }; |
| template (value) RTP_AMR_BWE_Hdr ts_RTP_AMR_BWE_Hdr(template (value) uint4_t cmr, |
| template (value) uint4_t ft, |
| template (value) BIT1 q := '1'B, |
| template (value) BIT1 f := '0'B) := { |
| cmr := cmr, |
| f := f, |
| ft := ft, |
| q := q |
| } |
| external function enc_RTP_AMR_BWE_Hdr(in RTP_AMR_BWE_Hdr amr_hdr) return octetstring |
| with { extension "prototype(convert) encode(RAW)" }; |
| external function dec_RTP_AMR_BWE_Hdr(in octetstring stream) return RTP_AMR_BWE_Hdr |
| with { extension "prototype(convert) decode(RAW)" }; |
| |
| } with { encode "RAW"} |