92 lines
2.5 KiB
Plaintext
92 lines
2.5 KiB
Plaintext
/*
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* (C) 2019-2022 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 AMR_Types {
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import from General_Types all;
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import from Osmocom_Types all;
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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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const integer c_AMRFT_bits_len[9] := {95, 103, 118, 134, 148, 159, 204, 244, 39};
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function f_amrft_payload_bits_len(INT4b amr_ft) return integer {
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return c_AMRFT_bits_len[amr_ft];
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}
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type record RTP_AMR_Hdr {
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uint4_t cmr,
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BIT4 padding1,
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BIT1 f,
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uint4_t ft,
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BIT1 q,
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BIT2 padding2
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} with { variant "FIELDORDER(msb)" };
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template (value) RTP_AMR_Hdr ts_RTP_AMR_Hdr(template (value) uint4_t cmr,
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template (value) uint4_t ft,
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template (value) BIT1 q := '1'B,
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template (value) BIT1 f := '0'B) := {
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cmr := cmr,
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padding1 := '0000'B,
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f := f,
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ft := ft,
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q := q,
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padding2 := '00'B
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}
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external function enc_RTP_AMR_Hdr(in RTP_AMR_Hdr amr_hdr) return octetstring
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with { extension "prototype(convert) encode(RAW)" };
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external function dec_RTP_AMR_Hdr(in octetstring stream) return RTP_AMR_Hdr
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with { extension "prototype(convert) decode(RAW)" };
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type record RTP_AMR_BWE_Hdr {
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uint4_t cmr,
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BIT1 f,
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uint4_t ft,
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BIT1 q
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} with { variant "FIELDORDER(msb)" };
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template (value) RTP_AMR_BWE_Hdr ts_RTP_AMR_BWE_Hdr(template (value) uint4_t cmr,
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template (value) uint4_t ft,
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template (value) BIT1 q := '1'B,
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template (value) BIT1 f := '0'B) := {
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cmr := cmr,
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f := f,
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ft := ft,
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q := q
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}
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external function enc_RTP_AMR_BWE_Hdr(in RTP_AMR_BWE_Hdr amr_hdr) return octetstring
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with { extension "prototype(convert) encode(RAW)" };
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external function dec_RTP_AMR_BWE_Hdr(in octetstring stream) return RTP_AMR_BWE_Hdr
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with { extension "prototype(convert) decode(RAW)" };
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} with { encode "RAW"}
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