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view libtwamr/q_plsf5_tab.h @ 604:54f0f1b74c25

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libgsmhr1 TFO: require BFI=0 and SID=0 for homing In order for a received frame to be recognized as DHF, we need not only the correct bit pattern, but also BFI=0 and SID=0. The BFI=0 requirement should be obvious, while the SID=0 requirement is needed only for HR codec. With FR and EFR, SID classification comes from the payload bits and no separate check is needed - but in HR we get an out-of-band SID ternary flag. When SID=1, no payload bits are used at all; when SID=2, we use only the first 33 bits of the payload. Therefore, it is proper to conditionalize DHF acceptance on SID=0. We already implemented this logic in the just finished full decoder; now bring TFO code into agreement.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 04 Dec 2025 19:40:35 +0000
parents 450b090f2fd7
children
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/*
 * The original ETSI EFR code features an include file named q_plsf_5.tab,
 * included into d_homing.c, d_plsf_5.c and q_plsf_5.c, duplicating
 * the small mean_lsf[] table across all 3 modules and the other (big)
 * tables across d_plsf_5.c for the decoder and q_plsf_5.c for the encoder.
 *
 * In our version we have moved the tables into q_plsf5_tab.c,
 * with extern declarations in q_plsf5_tab.h.
 *
 * Update for libtwamr: this table is unchanged from ETSI EFR, hence
 * we are keeping our version unchanged from libgsmefr too.
 */

#ifndef	q_plsf5_tab_h
#define	q_plsf5_tab_h

#include "typedef.h"

extern const Word16 mean_lsf[10];

#define DICO1_SIZE  128
#define DICO2_SIZE  256
#define DICO3_SIZE  256
#define DICO4_SIZE  256
#define DICO5_SIZE  64

extern const Word16 dico1_lsf[DICO1_SIZE * 4];
extern const Word16 dico2_lsf[DICO2_SIZE * 4];
extern const Word16 dico3_lsf[DICO3_SIZE * 4];
extern const Word16 dico4_lsf[DICO4_SIZE * 4];
extern const Word16 dico5_lsf[DICO5_SIZE * 4];

#endif