diff options
Diffstat (limited to 'src/freedv_data_raw_rx.c')
| -rw-r--r-- | src/freedv_data_raw_rx.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/src/freedv_data_raw_rx.c b/src/freedv_data_raw_rx.c index 0353ae5..435648d 100644 --- a/src/freedv_data_raw_rx.c +++ b/src/freedv_data_raw_rx.c @@ -39,6 +39,7 @@ #include "ldpc_codes.h" #include "modem_stats.h" #include "octave.h" +#include "ofdm_internal.h" /* other processes can end this program using signals */ @@ -216,6 +217,8 @@ int main(int argc, char *argv[]) { mode = FREEDV_MODE_DATAC13; if (!strcmp(argv[dx], "DATAC14") || !strcmp(argv[dx], "datac14")) mode = FREEDV_MODE_DATAC14; + if (!strcmp(argv[dx], "CUSTOM") || !strcmp(argv[dx], "custom")) + mode = FREEDV_MODE_DATA_CUSTOM; if (mode == -1) { fprintf(stderr, "Error in mode: %s\n", argv[dx]); exit(1); @@ -248,6 +251,23 @@ int main(int argc, char *argv[]) { fprintf(stderr, "Setting estimator limits to %d to %d Hz.\n", fsk_lower, fsk_upper); fsk_set_freq_est_limits(fsk, fsk_lower, fsk_upper); + } else if (mode == FREEDV_MODE_DATA_CUSTOM) { + // demonstrate custom OFDM raw data modes + struct OFDM_CONFIG ofdm_config; + ofdm_init_mode("datac14", &ofdm_config); + // modify datac14 to have 3 carriers instead of 4, which means + // we have to tweak Np, and the number of unique word bits + ofdm_config.nc = 3; + ofdm_config.np = 6; + ofdm_config.nuwbits = 48; + ofdm_config.bad_uw_errors = 18; + uint8_t uw[] = {1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, + 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0}; + memcpy(ofdm_config.tx_uw, uw, sizeof(uw)); + memcpy(&ofdm_config.tx_uw[ofdm_config.nuwbits - sizeof(uw)], uw, + sizeof(uw)); + adv.config = (void *)&ofdm_config; + freedv = freedv_open_advanced(mode, &adv); } else { freedv = freedv_open(mode); } @@ -264,8 +284,8 @@ int main(int argc, char *argv[]) { fsk->Ndft); } - /* for streaming bytes it's much easier use the modes that have a multiple of - * 8 payload bits/frame */ + /* for streaming bytes it's much easier use the modes that have a multiple + * of 8 payload bits/frame */ assert((freedv_get_bits_per_modem_frame(freedv) % 8) == 0); int bytes_per_modem_frame = freedv_get_bits_per_modem_frame(freedv) / 8; // last two bytes used for CRC |