view miscutil/amr122bits.c @ 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 d86f866489e9
children
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/*
 * This C module provides the bit reordering table to be used for conversion
 * between EFR in ETSI TS 101 318 representation and AMR 12k2 in RFC 4867
 * or AMR IF1 representation, which is the table mapping from AMR IF1 bit
 * order for 12k2 mode to the "natural" bit order of codec parameters.
 */

#include <stdint.h>

const uint8_t amr_122_bit_order[244] = {
    0,   1,   2,   3,   4,   5,   6,   7,   8,   9,
   10,  11,  12,  13,  14,  23,  15,  16,  17,  18,
   19,  20,  21,  22,  24,  25,  26,  27,  28,  38,
  141,  39, 142,  40, 143,  41, 144,  42, 145,  43,
  146,  44, 147,  45, 148,  46, 149,  47,  97, 150,
  200,  48,  98, 151, 201,  49,  99, 152, 202,  86,
  136, 189, 239,  87, 137, 190, 240,  88, 138, 191,
  241,  91, 194,  92, 195,  93, 196,  94, 197,  95,
  198,  29,  30,  31,  32,  33,  34,  35,  50, 100,
  153, 203,  89, 139, 192, 242,  51, 101, 154, 204,
   55, 105, 158, 208,  90, 140, 193, 243,  59, 109,
  162, 212,  63, 113, 166, 216,  67, 117, 170, 220,
   36,  37,  54,  53,  52,  58,  57,  56,  62,  61,
   60,  66,  65,  64,  70,  69,  68, 104, 103, 102,
  108, 107, 106, 112, 111, 110, 116, 115, 114, 120,
  119, 118, 157, 156, 155, 161, 160, 159, 165, 164,
  163, 169, 168, 167, 173, 172, 171, 207, 206, 205,
  211, 210, 209, 215, 214, 213, 219, 218, 217, 223,
  222, 221,  73,  72,  71,  76,  75,  74,  79,  78,
   77,  82,  81,  80,  85,  84,  83, 123, 122, 121,
  126, 125, 124, 129, 128, 127, 132, 131, 130, 135,
  134, 133, 176, 175, 174, 179, 178, 177, 182, 181,
  180, 185, 184, 183, 188, 187, 186, 226, 225, 224,
  229, 228, 227, 232, 231, 230, 235, 234, 233, 238,
  237, 236,  96, 199						
};