FreeCalypso > hg > gsm-codec-lib
view libtwamr/q_plsf5_tab.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 | 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