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osmo-ttcn3-hacks
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library/AMR: Add RTP AMR helper structs and functions 

Change-Id: I40cd999badeeefa38a393af9008d8ce047e3c778
This commit is contained in:
Pau Espin 2022-09-06 20:25:50 +02:00
parent 440e1dcb34
commit 1a8f8f8ab6
1 changed files with 26 additions and 0 deletions
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26
library/AMR_Types.ttcn
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@ -11,6 +11,7 @@
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
@ -35,4 +36,29 @@ function f_amrft_payload_len(INT4b amr_ft) return integer {
return c_AMRFT_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)" };
} with { encode "RAW"}