FreeCalypso > hg > gsm-codec-lib
view libtwamr/gains_tab.c @ 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 | 5db2c920fc23 |
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 : gains.tab * Purpose : Scalar quantization tables of the pitch gain and * : the codebook gain. * $Id $ * ******************************************************************************** */ #include "namespace.h" #include "typedef.h" #include "gains_tab.h" const Word16 qua_gain_pitch[NB_QUA_PITCH] = { 0, 3277, 6556, 8192, 9830, 11469, 12288, 13107, 13926, 14746, 15565, 16384, 17203, 18022, 18842, 19661 }; const Word16 qua_gain_code[NB_QUA_CODE*3] = { /* gain factor (g_fac) and quantized energy error (qua_ener_MR122, qua_ener) * are stored: * * qua_ener_MR122 = log2(g_fac) (not the rounded floating point value, but * the value the original EFR algorithm * calculates from g_fac [using Log2]) * qua_ener = 20*log10(g_fac); (rounded floating point value) * * * g_fac (Q11), qua_ener_MR122 (Q10), qua_ener (Q10) */ 159, -3776, -22731, 206, -3394, -20428, 268, -3005, -18088, 349, -2615, -15739, 419, -2345, -14113, 482, -2138, -12867, 554, -1932, -11629, 637, -1726, -10387, 733, -1518, -9139, 842, -1314, -7906, 969, -1106, -6656, 1114, -900, -5416, 1281, -694, -4173, 1473, -487, -2931, 1694, -281, -1688, 1948, -75, -445, 2241, 133, 801, 2577, 339, 2044, 2963, 545, 3285, 3408, 752, 4530, 3919, 958, 5772, 4507, 1165, 7016, 5183, 1371, 8259, 5960, 1577, 9501, 6855, 1784, 10745, 7883, 1991, 11988, 9065, 2197, 13231, 10425, 2404, 14474, 12510, 2673, 16096, 16263, 3060, 18429, 21142, 3448, 20763, 27485, 3836, 23097 };