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annotate libtwamr/pow2.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 190c4c9a3693
children
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190c4c9a3693 libtwamr: integrate pow2.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : pow2.h
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11 * Purpose : computes L_x = pow(2.0, exponent.fraction)
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12 *
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13 ********************************************************************************
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14 */
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15 #ifndef pow2_h
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16 #define pow2_h "$Id $"
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17
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18 /*
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19 ********************************************************************************
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20 * INCLUDE FILES
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21 ********************************************************************************
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22 */
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23 #include "typedef.h"
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24
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25 /*
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26 ********************************************************************************
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27 * DEFINITION OF DATA TYPES
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28 ********************************************************************************
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29 */
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30
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31 /*
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32 ********************************************************************************
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33 * DECLARATION OF PROTOTYPES
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34 ********************************************************************************
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35 */
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36 Word32 Pow2 ( /* (o) : result (range: 0<=val<=0x7fffffff) */
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37 Word16 exponent, /* (i) : Integer part. (range: 0<=val<=30) */
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38 Word16 fraction /* (i) : Fractional part. (range: 0.0<=val<1.0) */
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39 );
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40
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41 #endif