FreeCalypso > hg > gsm-codec-lib
view libtwamr/vad.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 | 028ed5114e52 |
| children |
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/* * In the original 3GPP code, the selection between VAD1 and VAD2 is made * only at compile time. In libtwamr we support run-time selection between * these two VAD algorithms for tinkering and investigation work; this * header file implements the logic that fits this run-time selection * into the existing code structure from 3GPP. */ #ifndef vad_h #define vad_h #include "typedef.h" #include "vad1.h" #include "vad2.h" typedef struct { Flag use_vad2; union { vadState1 v1; vadState2 v2; } u; } vadState; void vad_reset(vadState *st, Flag use_vad2); #endif /* include guard */
