FreeCalypso > hg > gsm-codec-lib
view libtwamr/sqrt_l.tab @ 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 | 8dfb7cbe6b59 |
| children |
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/* ******************************************************************************** * * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 * R99 Version 3.3.0 * REL-4 Version 4.1.0 * ******************************************************************************** * * File : sqrt_l.tab * Purpose : Table for routine sqrt_l_exp() * $Id $ * ******************************************************************************** */ /* table[i] = sqrt((i+16)*2^-6) * 2^15, i.e. sqrt(x) scaled Q15 */ static const Word16 table[49] = { 16384, 16888, 17378, 17854, 18318, 18770, 19212, 19644, 20066, 20480, 20886, 21283, 21674, 22058, 22435, 22806, 23170, 23530, 23884, 24232, 24576, 24915, 25249, 25580, 25905, 26227, 26545, 26859, 27170, 27477, 27780, 28081, 28378, 28672, 28963, 29251, 29537, 29819, 30099, 30377, 30652, 30924, 31194, 31462, 31727, 31991, 32252, 32511, 32767 };