FreeCalypso > hg > gsm-codec-lib
view dev/efr-tidsp.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 | 68215020852b |
| children |
line wrap: on
line source
/* * This program constructs a table for extracting a 244-bit EFR codec frame * from a 33-byte frame that has been read out of Calypso DSP buffer on a * TCH/EFS downlink. Our starting material is Osmocom's rendition of * GSM 05.03 Table 6. */ #include <stdio.h> #include <stdlib.h> /* GSM EFR - subjective importance bit ordering */ /* This array encodes GSM 05.03 Table 6. * * It converts between serial parameter output (as described in * GSM 06.60 Table 6 and GSM 05.03 Table 5) and the order needed * before channel encoding. CRC poly and bit repetition must be * applied prior to this table, as in GSM 05.03 3.1.1, to get 260 * bits from a 244 bits raw EFR frame. */ const unsigned short gsm660_bitorder[260] = { 38, 39, 40, 41, 42, 43, /* 0 -> LTP-LAG 1: b8..b3 */ 145, 146, 147, 148, 149, 150, /* 6 -> LTP-LAG 3: b8..b3 */ 93, 94, /* 12 -> LTP-LAG 2: b5..b4 */ 200, 201, /* 14 -> LTP-LAG 4: b5..b4 */ 47, /* 16 -> LTP-GAIN 1: b3 */ 88, /* 17 -> FCB-GAIN 1: b4 */ 99, /* 18 -> LTP-GAIN 2: b3 */ 140, /* 19 -> FCB-GAIN 2: b4 */ 44, /* 20 -> LTP-LAG 1: b2 */ 151, /* 21 -> LTP-LAG 3: b2 */ 95, /* 22 -> LTP-LAG 2: b3 */ 202, /* 23 -> LTP-LAG 4: b3 */ 1, 2, /* 24 -> LPC 1: b5..b4 */ 7, /* 26 -> LPC 2: b7 */ 9, /* 27 -> LPC 2: b5 */ 17, 18, /* 28 -> LPC 3: b6..b5 */ 23, /* 30 -> LPC 3: b0 */ 45, 46, /* 31 -> LTP-LAG 1: b1..b0 */ 152, 153, /* 33 -> LTP-LAG 3: b1..b0 */ 96, /* 35 -> LTP-LAG 2: b2 */ 203, /* 36 -> LTP-LAG 4: b2 */ 3, 4, /* 37 -> LPC 1: b3..b2 */ 10, 11, /* 39 -> LPC 2: b4..b3 */ 15, /* 41 -> LPC 3: b8 */ 8, /* 42 -> LPC 2: b6 */ 5, 6, /* 43 -> LPC 1: b1..b0 */ 12, /* 45 -> LPC 2: b2 */ 16, /* 46 -> LPC 3: b7 */ 19, /* 47 -> LPC 3: b4 */ 97, /* 48 -> LTP-LAG 2: b1 */ 204, /* 49 -> LTP-LAG 4: b1 */ 0, /* 50 -> LPC 1: b6 */ 13, 14, /* 51 -> LPC 2: b1..b0 */ 20, /* 53 -> LPC 3: b3 */ 24, 25, /* 54 -> LPC 4: b7..b6 */ 27, /* 56 -> LPC 4: b4 */ 154, /* 57 -> LTP-GAIN 3: b3 */ 206, /* 58 -> LTP-GAIN 4: b3 */ 195, /* 59 -> FCB-GAIN 3: b4 */ 247, /* 60 -> FCB-GAIN 4: b4 */ 89, /* 61 -> FCB-GAIN 1: b3 */ 141, /* 62 -> FCB-GAIN 2: b3 */ 196, /* 63 -> FCB-GAIN 3: b3 */ 248, /* 64 -> FCB-GAIN 4: b3 */ 252, 253, 254, 255, 256, 257, 258, 259, /* 65 -> CRC-POLY: b7..b0 */ 48, /* 73 -> LTP-GAIN 1: b2 */ 100, /* 74 -> LTP-GAIN 2: b2 */ 155, /* 75 -> LTP-GAIN 3: b2 */ 207, /* 76 -> LTP-GAIN 4: b2 */ 21, 22, /* 77 -> LPC 3: b2..b1 */ 26, /* 79 -> LPC 4: b5 */ 28, /* 80 -> LPC 4: b3 */ 51, /* 81 -> PULSE 1_1: b3 */ 55, /* 82 -> PULSE 1_2: b3 */ 59, /* 83 -> PULSE 1_3: b3 */ 63, /* 84 -> PULSE 1_4: b3 */ 67, /* 85 -> PULSE 1_5: b3 */ 103, /* 86 -> PULSE 2_1: b3 */ 107, /* 87 -> PULSE 2_2: b3 */ 111, /* 88 -> PULSE 2_3: b3 */ 115, /* 89 -> PULSE 2_4: b3 */ 119, /* 90 -> PULSE 2_5: b3 */ 158, /* 91 -> PULSE 3_1: b3 */ 162, /* 92 -> PULSE 3_2: b3 */ 166, /* 93 -> PULSE 3_3: b3 */ 170, /* 94 -> PULSE 3_4: b3 */ 174, /* 95 -> PULSE 3_5: b3 */ 210, /* 96 -> PULSE 4_1: b3 */ 214, /* 97 -> PULSE 4_2: b3 */ 218, /* 98 -> PULSE 4_3: b3 */ 222, /* 99 -> PULSE 4_4: b3 */ 226, /* 100 -> PULSE 4_5: b3 */ 90, /* 101 -> FCB-GAIN 1: b2 */ 142, /* 102 -> FCB-GAIN 2: b2 */ 197, /* 103 -> FCB-GAIN 3: b2 */ 249, /* 104 -> FCB-GAIN 4: b2 */ 49, /* 105 -> LTP-GAIN 1: b1 */ 101, /* 106 -> LTP-GAIN 2: b1 */ 156, /* 107 -> LTP-GAIN 3: b1 */ 208, /* 108 -> LTP-GAIN 4: b1 */ 29, 30, 31, /* 109 -> LPC 4: b2..b0 */ 32, 33, 34, 35, /* 112 -> LPC 5: b5..b2 */ 98, /* 116 -> LTP-LAG 2: b0 */ 205, /* 117 -> LTP-LAG 4: b0 */ 52, /* 118 -> PULSE 1_1: b2 */ 56, /* 119 -> PULSE 1_2: b2 */ 60, /* 120 -> PULSE 1_3: b2 */ 64, /* 121 -> PULSE 1_4: b2 */ 68, /* 122 -> PULSE 1_5: b2 */ 104, /* 123 -> PULSE 2_1: b2 */ 108, /* 124 -> PULSE 2_2: b2 */ 112, /* 125 -> PULSE 2_3: b2 */ 116, /* 126 -> PULSE 2_4: b2 */ 120, /* 127 -> PULSE 2_5: b2 */ 159, /* 128 -> PULSE 3_1: b2 */ 163, /* 129 -> PULSE 3_2: b2 */ 167, /* 130 -> PULSE 3_3: b2 */ 171, /* 131 -> PULSE 3_4: b2 */ 175, /* 132 -> PULSE 3_5: b2 */ 211, /* 133 -> PULSE 4_1: b2 */ 215, /* 134 -> PULSE 4_2: b2 */ 219, /* 135 -> PULSE 4_3: b2 */ 223, /* 136 -> PULSE 4_4: b2 */ 227, /* 137 -> PULSE 4_5: b2 */ 53, /* 138 -> PULSE 1_1: b1 */ 57, /* 139 -> PULSE 1_2: b1 */ 61, /* 140 -> PULSE 1_3: b1 */ 65, /* 141 -> PULSE 1_4: b1 */ 105, /* 142 -> PULSE 2_1: b1 */ 109, /* 143 -> PULSE 2_2: b1 */ 113, /* 144 -> PULSE 2_3: b1 */ 117, /* 145 -> PULSE 2_4: b1 */ 160, /* 146 -> PULSE 3_1: b1 */ 164, /* 147 -> PULSE 3_2: b1 */ 168, /* 148 -> PULSE 3_3: b1 */ 172, /* 149 -> PULSE 3_4: b1 */ 212, /* 150 -> PULSE 4_1: b1 */ 220, /* 151 -> PULSE 4_3: b1 */ 224, /* 152 -> PULSE 4_4: b1 */ 91, /* 153 -> FCB-GAIN 1: b1 */ 143, /* 154 -> FCB-GAIN 2: b1 */ 198, /* 155 -> FCB-GAIN 3: b1 */ 250, /* 156 -> FCB-GAIN 4: b1 */ 50, /* 157 -> LTP-GAIN 1: b0 */ 102, /* 158 -> LTP-GAIN 2: b0 */ 157, /* 159 -> LTP-GAIN 3: b0 */ 209, /* 160 -> LTP-GAIN 4: b0 */ 92, /* 161 -> FCB-GAIN 1: b0 */ 144, /* 162 -> FCB-GAIN 2: b0 */ 199, /* 163 -> FCB-GAIN 3: b0 */ 251, /* 164 -> FCB-GAIN 4: b0 */ 54, /* 165 -> PULSE 1_1: b0 */ 58, /* 166 -> PULSE 1_2: b0 */ 62, /* 167 -> PULSE 1_3: b0 */ 66, /* 168 -> PULSE 1_4: b0 */ 106, /* 169 -> PULSE 2_1: b0 */ 110, /* 170 -> PULSE 2_2: b0 */ 114, /* 171 -> PULSE 2_3: b0 */ 118, /* 172 -> PULSE 2_4: b0 */ 161, /* 173 -> PULSE 3_1: b0 */ 165, /* 174 -> PULSE 3_2: b0 */ 169, /* 175 -> PULSE 3_3: b0 */ 173, /* 176 -> PULSE 3_4: b0 */ 213, /* 177 -> PULSE 4_1: b0 */ 221, /* 178 -> PULSE 4_3: b0 */ 225, /* 179 -> PULSE 4_4: b0 */ 36, 37, /* 180 -> LPC 5: b1..b0 */ 69, /* 182 -> PULSE 1_5: b1 */ 71, 72, /* 183 -> PULSE 1_5: b1..b1 */ 121, /* 185 -> PULSE 2_5: b1 */ 123, 124, /* 186 -> PULSE 2_5: b1..b1 */ 176, /* 188 -> PULSE 3_5: b1 */ 178, 179, /* 189 -> PULSE 3_5: b1..b1 */ 228, /* 191 -> PULSE 4_5: b1 */ 230, 231, /* 192 -> PULSE 4_5: b1..b1 */ 216, 217, /* 194 -> PULSE 4_2: b1..b0 */ 70, /* 196 -> PULSE 1_5: b0 */ 122, /* 197 -> PULSE 2_5: b0 */ 177, /* 198 -> PULSE 3_5: b0 */ 229, /* 199 -> PULSE 4_5: b0 */ 73, /* 200 -> PULSE 1_6: b2 */ 76, /* 201 -> PULSE 1_7: b2 */ 79, /* 202 -> PULSE 1_8: b2 */ 82, /* 203 -> PULSE 1_9: b2 */ 85, /* 204 -> PULSE 1_10: b2 */ 125, /* 205 -> PULSE 2_6: b2 */ 128, /* 206 -> PULSE 2_7: b2 */ 131, /* 207 -> PULSE 2_8: b2 */ 134, /* 208 -> PULSE 2_9: b2 */ 137, /* 209 -> PULSE 2_10: b2 */ 180, /* 210 -> PULSE 3_6: b2 */ 183, /* 211 -> PULSE 3_7: b2 */ 186, /* 212 -> PULSE 3_8: b2 */ 189, /* 213 -> PULSE 3_9: b2 */ 192, /* 214 -> PULSE 3_10: b2 */ 232, /* 215 -> PULSE 4_6: b2 */ 235, /* 216 -> PULSE 4_7: b2 */ 238, /* 217 -> PULSE 4_8: b2 */ 241, /* 218 -> PULSE 4_9: b2 */ 244, /* 219 -> PULSE 4_10: b2 */ 74, /* 220 -> PULSE 1_6: b1 */ 77, /* 221 -> PULSE 1_7: b1 */ 80, /* 222 -> PULSE 1_8: b1 */ 83, /* 223 -> PULSE 1_9: b1 */ 86, /* 224 -> PULSE 1_10: b1 */ 126, /* 225 -> PULSE 2_6: b1 */ 129, /* 226 -> PULSE 2_7: b1 */ 132, /* 227 -> PULSE 2_8: b1 */ 135, /* 228 -> PULSE 2_9: b1 */ 138, /* 229 -> PULSE 2_10: b1 */ 181, /* 230 -> PULSE 3_6: b1 */ 184, /* 231 -> PULSE 3_7: b1 */ 187, /* 232 -> PULSE 3_8: b1 */ 190, /* 233 -> PULSE 3_9: b1 */ 193, /* 234 -> PULSE 3_10: b1 */ 233, /* 235 -> PULSE 4_6: b1 */ 236, /* 236 -> PULSE 4_7: b1 */ 239, /* 237 -> PULSE 4_8: b1 */ 242, /* 238 -> PULSE 4_9: b1 */ 245, /* 239 -> PULSE 4_10: b1 */ 75, /* 240 -> PULSE 1_6: b0 */ 78, /* 241 -> PULSE 1_7: b0 */ 81, /* 242 -> PULSE 1_8: b0 */ 84, /* 243 -> PULSE 1_9: b0 */ 87, /* 244 -> PULSE 1_10: b0 */ 127, /* 245 -> PULSE 2_6: b0 */ 130, /* 246 -> PULSE 2_7: b0 */ 133, /* 247 -> PULSE 2_8: b0 */ 136, /* 248 -> PULSE 2_9: b0 */ 139, /* 249 -> PULSE 2_10: b0 */ 182, /* 250 -> PULSE 3_6: b0 */ 185, /* 251 -> PULSE 3_7: b0 */ 188, /* 252 -> PULSE 3_8: b0 */ 191, /* 253 -> PULSE 3_9: b0 */ 194, /* 254 -> PULSE 3_10: b0 */ 234, /* 255 -> PULSE 4_6: b0 */ 237, /* 256 -> PULSE 4_7: b0 */ 240, /* 257 -> PULSE 4_8: b0 */ 243, /* 258 -> PULSE 4_9: b0 */ 246, /* 259 -> PULSE 4_10: b0 */ }; unsigned short new_table[244]; static void gen_new_table() { int i, w, s, ti; for (i = 0; i < 260; i++) { w = gsm660_bitorder[i]; /* not doing CRC bits */ if (w >= 252) continue; /* not doing repetition bits */ if (w == 71 || w == 72) continue; if (w == 123 || w == 124) continue; if (w == 178 || w == 179) continue; if (w == 230 || w == 231) continue; /* get s number back from w */ if (w >= 232) s = w - 8; else if (w >= 180) s = w - 6; else if (w >= 125) s = w - 4; else if (w >= 73) s = w - 2; else s = w; /* TI bit number: gap of 4 between 182 and 78 */ if (i >= 182) ti = i + 4; else ti = i; new_table[s] = ti; } } static void emit_output() { int i; for (i = 0; i < 244; i++) { if (i % 12) putchar(' '); else { putchar('\n'); putchar('\t'); } printf("%3u,", new_table[i]); } putchar('\n'); } main(argc, argv) char **argv; { gen_new_table(); emit_output(); exit(0); }