libtwamr encoder: always emit frame->mode = mode; In the original implementation of amr_encode_frame(), the 'mode' member of the output struct was set to 0xFF if the output frame type is TX_NO_DATA. This design was made to mimic the mode field (16-bit word) being set to 0xFFFF (or -1) in 3GPP test sequence format - but nothing actually depends on this struct member being set in any way, and amr_frame_to_tseq() generates the needed 0xFFFF on its own, based on frame->type being equal to TX_NO_DATA. It is simpler and more efficient to always set frame->mode to the actual encoding mode in amr_encode_frame(), and this new behavior has already been documented in doc/AMR-library-API description in anticipation of the present change.

/*
 * This header file contains preprocessor definitions and extern
 * declarations for the tables which originally resided in gains.tab
 * and were multiply included in many source modules.
 */

#ifndef	gains_tab_h
#define	gains_tab_h

#include "typedef.h"

#define NB_QUA_PITCH 16

extern const Word16 qua_gain_pitch[NB_QUA_PITCH];

#define NB_QUA_CODE 32

extern const Word16 qua_gain_code[NB_QUA_CODE*3];

#endif