FreeCalypso > hg > gsm-codec-lib
view libtwamr/grid.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 | 54f6bc41ed10 |
| 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 : pow2.c * Purpose : Table for az_lsf() * $Id $ * ******************************************************************************** */ /*-------------------------------------------------------------* * Table for az_lsf() * * * * grid[0] = 1.0; * * grid[grid_points+1] = -1.0; * * for (i = 1; i < grid_points; i++) * * grid[i] = cos((6.283185307*i)/(2.0*grid_points)); * * * *-------------------------------------------------------------*/ #define grid_points 60 static const Word16 grid[grid_points + 1] = { 32760, 32723, 32588, 32364, 32051, 31651, 31164, 30591, 29935, 29196, 28377, 27481, 26509, 25465, 24351, 23170, 21926, 20621, 19260, 17846, 16384, 14876, 13327, 11743, 10125, 8480, 6812, 5126, 3425, 1714, 0, -1714, -3425, -5126, -6812, -8480, -10125, -11743, -13327, -14876, -16384, -17846, -19260, -20621, -21926, -23170, -24351, -25465, -26509, -27481, -28377, -29196, -29935, -30591, -31164, -31651, -32051, -32364, -32588, -32723, -32760 };