FreeCalypso > hg > gsm-codec-lib
view amrtest/mode_kw.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 | 1ceda5586d01 |
| children |
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/* * The function in this module groks user-input mode strings like "MR122" * and returns the mode number. */ #include <stdlib.h> #include <string.h> #include <strings.h> #include "../libtwamr/tw_amr.h" grok_mode_name(mode_str, mode_out) char *mode_str; enum Mode *mode_out; { if (!strcmp(mode_str, "MR475")) *mode_out = MR475; else if (!strcmp(mode_str, "MR515")) *mode_out = MR515; else if (!strcmp(mode_str, "MR59")) *mode_out = MR59; else if (!strcmp(mode_str, "MR67")) *mode_out = MR67; else if (!strcmp(mode_str, "MR74")) *mode_out = MR74; else if (!strcmp(mode_str, "MR795")) *mode_out = MR795; else if (!strcmp(mode_str, "MR102")) *mode_out = MR102; else if (!strcmp(mode_str, "MR122")) *mode_out = MR122; else return -1; return 0; }
