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annotate libtwamr/c2_9pf.tab @ 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 ee64aabcc7a0
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ee64aabcc7a0 libtwamr: integrate c2_9pf.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 : c2_9pf.tab
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11 * Purpose : track start positions for fixed codebook routines
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12 * in c2_9pf.c/d2_9pf.c
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13 * $Id $
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14 *
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15 ********************************************************************************
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16 */
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17 static const Word16 startPos[2*4*2] = {0, 2, 0, 3,
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18 0, 2, 0, 3,
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19 1, 3, 2, 4,
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20 1, 4, 1, 4};