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annotate libtwamr/int_defs.h @ 605:63f774192906

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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 57b4053559ff
children
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1 /*
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2 * This header file is internal to libtwamr (not public API);
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3 * it contains internal definitions for aspects of the AMR codec
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4 * that don't need to be in the external API.
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5 */
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6
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7 #ifndef int_defs_h
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8 #define int_defs_h
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9
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10 /* number of speech bits for all modes */
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11 #define AMR_NBITS_475 95
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12 #define AMR_NBITS_515 103
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13 #define AMR_NBITS_59 118
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14 #define AMR_NBITS_67 134
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15 #define AMR_NBITS_74 148
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16 #define AMR_NBITS_795 159
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17 #define AMR_NBITS_102 204
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18 #define AMR_NBITS_122 244
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19 #define AMR_NBITS_SID 35
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20
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21 /* number of distinct parameters for all modes */
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22 #define PRMNO_MR475 17
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23 #define PRMNO_MR515 19
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24 #define PRMNO_MR59 19
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25 #define PRMNO_MR67 19
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26 #define PRMNO_MR74 19
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27 #define PRMNO_MR795 23
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28 #define PRMNO_MR102 39
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29 #define PRMNO_MR122 57
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30 #define PRMNO_MRDTX 5
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31
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32 /* number of parameters up to first subframe (for DHF detection) */
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33 #define PRMNOFSF_MR475 7
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34 #define PRMNOFSF_MR515 7
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35 #define PRMNOFSF_MR59 7
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36 #define PRMNOFSF_MR67 7
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37 #define PRMNOFSF_MR74 7
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38 #define PRMNOFSF_MR795 8
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39 #define PRMNOFSF_MR102 12
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40 #define PRMNOFSF_MR122 18
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41
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42 #endif /* include guard */