FreeCalypso > hg > gsm-codec-lib
view efrtest/dlcap-parse.c @ 269:bd2271cb95d4
libgsmfr2: integrate preprocess.c from libgsm
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 14 Apr 2024 01:58:35 +0000 |
parents | b98aebd94d1f |
children |
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/* * This program reads a TCH/EFS downlink capture produced with FreeCalypso tools * (fw version with TCH downlink sniffing feature and fc-shell tch record), * parses the frame bits according to our current understanding, and dumps * everything in human-readable form for further analysis. */ #include <ctype.h> #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "../libgsmefr/gsm_efr.h" static void process_record(lineno, fn_mod_104, status_words, tidsp_bytes) int lineno; unsigned fn_mod_104; uint16_t *status_words; uint8_t *tidsp_bytes; { uint8_t efr_bytes[EFR_RTP_FRAME_LEN]; int16_t params[EFR_NUM_PARAMS]; int i, j, n; printf("#%d: fn=%u DSP %04X %04X %04X\n", lineno, fn_mod_104, status_words[0], status_words[1], status_words[2]); efr_tidsp_to_std(tidsp_bytes, efr_bytes); fputs(" bits ", stdout); for (i = 0; i < 33; i++) printf("%02X", tidsp_bytes[i]); printf(" SID=%d\n", EFR_sid_classify(efr_bytes)); printf(" rept-bits %u %u %u %u\n", (tidsp_bytes[23] & 0x38) >> 3, tidsp_bytes[23] & 7, (tidsp_bytes[24] & 0xE0) >> 5, (tidsp_bytes[24] & 0x1C) >> 2); EFR_frame2params(efr_bytes, params); fputs(" LPC", stdout); n = 0; for (i = 0; i < 5; i++) printf(" %d", params[n++]); putchar('\n'); for (i = 0; i < 4; i++) { putchar(' '); for (j = 0; j < 13; j++) printf(" %d", params[n++]); putchar('\n'); } } main(argc, argv) char **argv; { FILE *inf; char linebuf[128]; int lineno, rc; uint16_t status_words[3]; uint8_t tidsp_bytes[33]; unsigned fn_mod_104; if (argc != 2) { fprintf(stderr, "usage: %s dlcap-file\n", argv[0]); exit(1); } inf = fopen(argv[1], "r"); if (!inf) { perror(argv[1]); exit(1); } for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++) { /* support both old and new formats */ if (isxdigit(linebuf[0]) && isxdigit(linebuf[1]) && isxdigit(linebuf[2]) && isxdigit(linebuf[3])) { rc = parse_dlcap_common(linebuf, status_words, tidsp_bytes); if (rc < 0) { invalid: fprintf(stderr, "error: %s is not in the expected format\n", argv[1]); exit(1); } fn_mod_104 = 0; /* won't have TAF */ } else if (!strncmp(linebuf, "EFR ", 4)) { rc = parse_dlcap_common(linebuf + 4, status_words, tidsp_bytes); if (rc < 0) goto invalid; if (linebuf[85] != ' ') goto invalid; if (!isdigit(linebuf[86])) goto invalid; fn_mod_104 = strtoul(linebuf + 86, 0, 10); } else goto invalid; process_record(lineno, fn_mod_104, status_words, tidsp_bytes); } exit(0); }