FreeCalypso > hg > gsm-codec-lib
view libtwamr/memops.h @ 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 | 8dfb7cbe6b59 |
| children |
line wrap: on
line source
/* * The original code from ETSI uses its own Copy() and Set_zero() * functions, operating on Word16 elements. Here we implement them * as static inline functions wrapping around memcpy and memset. */ #include <string.h> static inline void Copy ( const Word16 x[], /* (i) : input vector */ Word16 y[], /* (o) : output vector */ Word16 L /* (i) : vector length */ ) { memcpy(y, x, L * 2); } static inline void Set_zero ( Word16 x[], /* (o) : vector to clear */ Word16 L /* (i) : length of vector */ ) { memset(x, 0, L * 2); }
