| Harald Welte | c4cfb80 | 2022-11-29 23:16:52 +0100 | [diff] [blame] | 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <stdint.h> |
| 4 | #include <unistd.h> |
| 5 | |
| 6 | #include <osmocom/core/bits.h> |
| 7 | #include <osmocom/isdn/v110.h> |
| 8 | #include <osmocom/gsm/gsm44021.h> |
| 9 | |
| 10 | |
| 11 | static void fill_v110_frame(struct osmo_v110_decoded_frame *fr) |
| 12 | { |
| 13 | unsigned int i; |
| 14 | |
| 15 | memset(fr, 0, sizeof(*fr)); |
| 16 | |
| 17 | /* we abuse the fact that ubit_t is 8bit so we can actually |
| 18 | * store integer values to clearly identify which bit ends up where */ |
| 19 | |
| 20 | /* D1..D48: 101..148 */ |
| 21 | for (i = 0; i < ARRAY_SIZE(fr->d_bits); i++) |
| 22 | fr->d_bits[i] = 101 + i; |
| 23 | /* E1..E7: 201..207 */ |
| 24 | for (i = 0; i < ARRAY_SIZE(fr->e_bits); i++) |
| 25 | fr->e_bits[i] = 201 + i; |
| 26 | /* S1..S9: 211..219 */ |
| 27 | for (i = 0; i < ARRAY_SIZE(fr->s_bits); i++) |
| 28 | fr->s_bits[i] = 211 + i; |
| 29 | /* X1..X2: 221..222 */ |
| 30 | for (i = 0; i < ARRAY_SIZE(fr->x_bits); i++) |
| 31 | fr->x_bits[i] = 221 + i; |
| 32 | } |
| 33 | |
| 34 | |
| 35 | static void test_frame_enc_12k_6k(void) |
| 36 | { |
| 37 | struct osmo_v110_decoded_frame fr; |
| 38 | ubit_t bits[60]; |
| 39 | |
| 40 | printf("Testing Frame Encoding for 12k/6k radio interface rate\n"); |
| 41 | |
| 42 | fill_v110_frame(&fr); |
| 43 | |
| 44 | /* run encoder and dump to stdout */ |
| 45 | memset(bits, 0xff, sizeof(bits)); |
| 46 | osmo_csd_12k_6k_encode_frame(bits, sizeof(bits), &fr); |
| 47 | osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); |
| 48 | |
| 49 | /* run decoder on what we just encoded */ |
| 50 | memset(&fr, 0, sizeof(fr)); |
| 51 | osmo_csd_12k_6k_decode_frame(&fr, bits, sizeof(bits)); |
| 52 | |
| 53 | /* re-encode and dump again 'expout' will match it. */ |
| 54 | memset(bits, 0xff, sizeof(bits)); |
| 55 | osmo_csd_12k_6k_encode_frame(bits, sizeof(bits), &fr); |
| 56 | osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); |
| 57 | } |
| 58 | |
| 59 | static void test_frame_enc_3k6(void) |
| 60 | { |
| 61 | struct osmo_v110_decoded_frame fr; |
| 62 | ubit_t bits[36]; |
| 63 | |
| 64 | printf("Testing Frame Encoding for 3.6k radio interface rate\n"); |
| 65 | |
| 66 | fill_v110_frame(&fr); |
| 67 | /* different D-bit numbering for 3k6, see TS 44.021 Section 8.1.4 */ |
| 68 | for (unsigned int i = 0; i < ARRAY_SIZE(fr.d_bits); i++) |
| 69 | fr.d_bits[i] = 101 + i/2; |
| 70 | |
| 71 | /* run encoder and dump to stdout */ |
| 72 | memset(bits, 0xff, sizeof(bits)); |
| 73 | osmo_csd_3k6_encode_frame(bits, sizeof(bits), &fr); |
| 74 | osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); |
| 75 | |
| 76 | /* run decoder on what we just encoded */ |
| 77 | memset(&fr, 0, sizeof(fr)); |
| 78 | osmo_csd_3k6_decode_frame(&fr, bits, sizeof(bits)); |
| 79 | |
| 80 | /* re-encode and dump again 'expout' will match it. */ |
| 81 | memset(bits, 0xff, sizeof(bits)); |
| 82 | osmo_csd_3k6_encode_frame(bits, sizeof(bits), &fr); |
| 83 | osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); |
| 84 | } |
| 85 | |
| 86 | |
| 87 | int main(int argc, char **argv) |
| 88 | { |
| 89 | test_frame_enc_12k_6k(); |
| 90 | printf("\n"); |
| 91 | test_frame_enc_3k6(); |
| 92 | } |
| 93 | |