view libtwamr/int_defs.h @ 477:4c9222d95647

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.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 May 2024 22:30:42 +0000
parents 57b4053559ff
children
line wrap: on
line source

/*
 * This header file is internal to libtwamr (not public API);
 * it contains internal definitions for aspects of the AMR codec
 * that don't need to be in the external API.
 */

#ifndef	int_defs_h
#define	int_defs_h

/* number of speech bits for all modes */
#define	AMR_NBITS_475		95
#define	AMR_NBITS_515		103
#define	AMR_NBITS_59		118
#define	AMR_NBITS_67		134
#define	AMR_NBITS_74		148
#define	AMR_NBITS_795		159
#define	AMR_NBITS_102		204
#define	AMR_NBITS_122		244
#define	AMR_NBITS_SID		35

/* number of distinct parameters for all modes */
#define	PRMNO_MR475		17
#define	PRMNO_MR515		19
#define	PRMNO_MR59		19
#define	PRMNO_MR67		19
#define	PRMNO_MR74		19
#define	PRMNO_MR795		23
#define	PRMNO_MR102		39
#define	PRMNO_MR122		57
#define	PRMNO_MRDTX		5

/* number of parameters up to first subframe (for DHF detection) */
#define	PRMNOFSF_MR475		7
#define	PRMNOFSF_MR515		7
#define	PRMNOFSF_MR59		7
#define	PRMNOFSF_MR67		7
#define	PRMNOFSF_MR74		7
#define	PRMNOFSF_MR795		8
#define	PRMNOFSF_MR102		12
#define	PRMNOFSF_MR122		18

#endif	/* include guard */