FreeCalypso > hg > gsm-codec-lib
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 |
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/* * 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 */