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view libtwamr/qua_gain_tab.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 5ccfe176bae1
children
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/*
 * This header file contains constant definitions and extern declarations
 * for tables that were originally in qua_gain.tab and qgain475.tab,
 * included in both decoder and encoder modules.
 */

#ifndef	qua_gain_tab_h
#define	qua_gain_tab_h

#include "typedef.h"

/* table used in 'high' rates: MR67 MR74 */
#define VQ_SIZE_HIGHRATES 128

extern const Word16 table_gain_highrates[VQ_SIZE_HIGHRATES*4];

/* table used in 'low' rates: MR475, MR515, MR59 */
#define VQ_SIZE_LOWRATES 64

extern const Word16 table_gain_lowrates[VQ_SIZE_LOWRATES*4];

/* table that was originally in qgain475.tab */

#define MR475_VQ_SIZE 256

extern const Word16 table_gain_MR475[MR475_VQ_SIZE*4];

#endif	/* include guard */