FreeCalypso > hg > gsm-codec-lib
view libtwamr/pow2.tab @ 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 | 190c4c9a3693 |
| children |
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/* ******************************************************************************** * * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 * R99 Version 3.3.0 * REL-4 Version 4.1.0 * ******************************************************************************** * * File : pow2.tab * Purpose : Table for routine Pow2(). * $Id $ * ******************************************************************************** */ static const Word16 table[33] = { 16384, 16743, 17109, 17484, 17867, 18258, 18658, 19066, 19484, 19911, 20347, 20792, 21247, 21713, 22188, 22674, 23170, 23678, 24196, 24726, 25268, 25821, 26386, 26964, 27554, 28158, 28774, 29405, 30048, 30706, 31379, 32066, 32767 };