FreeCalypso > hg > gsm-codec-lib
view libtwamr/prmno.c @ 605:63f774192906
gsmhr_decoder_twts002_in(): set BFI=1 SID=1 for invalid SID
When a received TW-TS-002 RTP payload indicates invalid SID,
which of the 3 possible BFI/SID combinations should we pass to
our internal ETSI-based speech decoder or TFO engine?
Our original code passed BFI=0 SID=1, but upon further reflection,
BFI=1 SID=1 is a better choice. In the corner case where received
invalid SID is fed to a full decoder in homed state, setting BFI=1
allows that decoder to emit zeros on PCM and stay homed, instead of
launching into full decoding.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Thu, 04 Dec 2025 21:01:46 +0000 |
| parents | f931e704adc5 |
| children |
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/* * This module holds prmno[] and prmnofs[] tables that were * originally in bitno.tab in 3GPP reference source. */ #include "typedef.h" #include "namespace.h" #include "int_defs.h" /* number of parameters per modes (values must be <= MAX_PRM_SIZE!) */ const Word16 prmno[9] = { PRMNO_MR475, PRMNO_MR515, PRMNO_MR59, PRMNO_MR67, PRMNO_MR74, PRMNO_MR795, PRMNO_MR102, PRMNO_MR122, PRMNO_MRDTX }; /* number of parameters to first subframe per modes */ const Word16 prmnofsf[8] = { PRMNOFSF_MR475, PRMNOFSF_MR515, PRMNOFSF_MR59, PRMNOFSF_MR67, PRMNOFSF_MR74, PRMNOFSF_MR795, PRMNOFSF_MR102, PRMNOFSF_MR122 };
