static void v27ter_rx_status_handler(void *user_data, int status) { fax_modems_state_t *s; s = (fax_modems_state_t *) user_data; switch (status) { case SIG_STATUS_TRAINING_SUCCEEDED: span_log(&s->logging, SPAN_LOG_FLOW, "Switching to V.27ter (%.2fdBm0)\n", v27ter_rx_signal_power(&s->v27ter_rx)); s->rx_handler = (span_rx_handler_t *) &v27ter_rx; s->rx_user_data = &s->v27ter_rx; break; } }
static void qam_report(void *user_data, const complexf_t *constel, const complexf_t *target, int symbol) { int i; int len; complexf_t *coeffs; float fpower; float error; v27ter_rx_state_t *rx; static float smooth_power = 0.0f; #if defined(ENABLE_GUI) static int reports = 0; #endif rx = (v27ter_rx_state_t *) user_data; if (constel) { fpower = (constel->re - target->re)*(constel->re - target->re) + (constel->im - target->im)*(constel->im - target->im); smooth_power = 0.95f*smooth_power + 0.05f*fpower; #if defined(ENABLE_GUI) if (use_gui) { qam_monitor_update_constel(qam_monitor, constel); qam_monitor_update_carrier_tracking(qam_monitor, v27ter_rx_carrier_frequency(rx)); qam_monitor_update_symbol_tracking(qam_monitor, v27ter_rx_symbol_timing_correction(rx)); } #endif error = constel->im*target->re - constel->re*target->im; printf("Tracking error %f %f %f %f %f %f\n", error, v27ter_rx_carrier_frequency(rx), constel->re, constel->im, target->re, target->im); printf("%8d [%8.4f, %8.4f] [%8.4f, %8.4f] %2x %8.4f %8.4f %9.4f %7.3f %7.2f\n", symbol_no, constel->re, constel->im, target->re, target->im, symbol, fpower, smooth_power, v27ter_rx_carrier_frequency(rx), v27ter_rx_signal_power(rx), v27ter_rx_symbol_timing_correction(rx)); len = v27ter_rx_equalizer_state(rx, &coeffs); printf("Equalizer B:\n"); for (i = 0; i < len; i++) printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i])); printf("Gardtest %d %f %d\n", symbol_no, v27ter_rx_symbol_timing_correction(rx), rx->gardner_integrate); printf("Carcar %d %f\n", symbol_no, v27ter_rx_carrier_frequency(rx)); #if defined(ENABLE_GUI) if (use_gui) { if (++reports >= 1000) { qam_monitor_update_equalizer(qam_monitor, coeffs, len); reports = 0; } } #endif symbol_no++; } else { printf("Gardner step %d\n", symbol); len = v27ter_rx_equalizer_state(rx, &coeffs); printf("Equalizer A:\n"); for (i = 0; i < len; i++) printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i])); #if defined(ENABLE_GUI) if (use_gui) qam_monitor_update_equalizer(qam_monitor, coeffs, len); #endif } }
static int v27ter_v21_rx(void *user_data, const int16_t amp[], int len) { fax_state_t *t; fax_modems_state_t *s; t = (fax_state_t *) user_data; s = &t->modems; v27ter_rx(&s->v27ter_rx, amp, len); if (t->t30.rx_trained) { /* The fast modem has trained, so we no longer need to run the slow one in parallel. */ span_log(&t->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.27ter (%.2fdBm0)\n", v27ter_rx_signal_power(&s->v27ter_rx)); set_rx_handler(t, (span_rx_handler_t *) &v27ter_rx, (span_rx_fillin_handler_t *) &v27ter_rx_fillin, &s->v27ter_rx); } else { fsk_rx(&s->v21_rx, amp, len); if (t->t30.rx_frame_received) { /* We have received something, and the fast modem has not trained. We must be receiving valid V.21 */ span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.21 (%.2fdBm0)\n", fsk_rx_signal_power(&s->v21_rx)); set_rx_handler(t, (span_rx_handler_t *) &fsk_rx, (span_rx_fillin_handler_t *) &fsk_rx_fillin, &s->v21_rx); } } return 0; }
static void v27ter_rx_status_handler(void *user_data, int status) { fax_modems_state_t *s; s = (fax_modems_state_t *) user_data; switch (status) { case SIG_STATUS_TRAINING_SUCCEEDED: span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.27ter (%.2fdBm0)\n", v27ter_rx_signal_power(&s->fast_modems.v27ter_rx)); fax_modems_set_rx_handler(s, (span_rx_handler_t) &v27ter_rx, &s->fast_modems.v27ter_rx, (span_rx_fillin_handler_t) &v27ter_rx_fillin, &s->fast_modems.v27ter_rx); v27ter_rx_set_modem_status_handler(&s->fast_modems.v27ter_rx, NULL, s); break; } /*endswitch*/ s->fast_modems.v27ter_rx.put_bit(s->fast_modems.v27ter_rx.put_bit_user_data, status); }
static int early_v27ter_rx(void *user_data, const int16_t amp[], int len) { fax_state_t *s; s = (fax_state_t *) user_data; v27ter_rx(&(s->v27ter_rx), amp, len); fsk_rx(&(s->v21rx), amp, len); if (s->t30_state.rx_trained) { /* The fast modem has trained, so we no longer need to run the slow one in parallel. */ span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.27ter (%.2fdBm0)\n", v27ter_rx_signal_power(&(s->v27ter_rx))); s->rx_handler = (span_rx_handler_t *) &v27ter_rx; s->rx_user_data = &(s->v27ter_rx); } return len; }