FreeCalypso > hg > gsm-codec-lib
view libgsmefr/q_plsf5_tab.h @ 183:452c1d5a6268
libgsmefr BFI w/o data: emit zero output after decoder reset
In real-life usage, each EFR decoder session will most likely begin
with lots of BFI frames before the first real frame arrives. However,
because the spec-defined home state of the decoder is speech rather
than CN, our regular logic for BFI w/o data would have to feed
pseudorandom noise to the decoder (in the "fixed codebook excitation
pulses" part), which is silly to do at the beginning of the decoder
session right out of reset. Therefore, let's check reset_flag_old,
and if we are still in the reset state, simply emit zero output.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Tue, 03 Jan 2023 00:12:18 +0000 |
| parents | cc08498ed21b |
| 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. */ 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];