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EDACS and Analog Monitoring - Apply Filtering Stack (DE,DC,PE, CL); Misc;

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lwvmobile
2024-02-12 13:18:56 -05:00
parent 374999df1f
commit de5b99dbb9
3 changed files with 86 additions and 23 deletions
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31
src/dsd_symbol.c
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@@ -288,12 +288,21 @@ getSymbol (dsd_opts * opts, dsd_state * state, int have_sync)
if (opts->audio_in_type != 3 && opts->monitor_input_audio == 1)
opts->rtl_rms = raw_rms(state->analog_out, 960, 1);
//debug
// opts->rtl_rms = 101;
//raw wav file saving -- only write when not NXDN, dPMR, or M17 due to noise that can cause tons of false positives when no sync
if (opts->wav_out_raw != NULL && opts->frame_nxdn48 == 0 && opts->frame_nxdn96 == 0 && opts->frame_dpmr == 0 && opts->frame_m17 == 0)
{
sf_write_short(opts->wav_out_raw, state->analog_out, 960);
sf_write_sync (opts->wav_out_raw);
}
//make it a little quieter
// for (int x = 0; x < 960; x++)
// state->analog_out[x] /= 4;
//test running analog audio through a de-emphasis filter
analog_deemph_filter(state->analog_out, 960);
//and dc_block filter analog_dc_block_filter
analog_dc_block_filter(state->analog_out, 960);
//test running analog audio through a pre-emphasis filter
analog_preemph_filter(state->analog_out, 960);
//test running analog short sample clipping filter
analog_clipping_filter(state->analog_out, 960);
//seems to be working now, but RMS values are lower on actual analog signal than on no signal but noise
if ( (opts->rtl_rms > opts->rtl_squelch_level) && opts->monitor_input_audio == 1 && state->carrier == 0 ) //added carrier check here in lieu of disabling it above
@@ -323,12 +332,12 @@ getSymbol (dsd_opts * opts, dsd_state * state, int have_sync)
state->last_vc_sync_time = time(NULL);
}
//raw wav file saving -- only write when not NXDN, dPMR, or M17 due to noise that can cause tons of false positives when no sync
if (opts->wav_out_raw != NULL && opts->frame_nxdn48 == 0 && opts->frame_nxdn96 == 0 && opts->frame_dpmr == 0 && opts->frame_m17 == 0)
{
sf_write_short(opts->wav_out_raw, state->analog_out, 960);
sf_write_sync (opts->wav_out_raw);
}
//raw wav file saving -- save the WAV file samples before we apply filtering to them
// if (opts->wav_out_raw != NULL && opts->frame_nxdn48 == 0 && opts->frame_nxdn96 == 0 && opts->frame_dpmr == 0 && opts->frame_m17 == 0)
// {
// sf_write_short(opts->wav_out_raw, state->analog_out, 960);
// sf_write_sync (opts->wav_out_raw);
// }
memset (state->analog_out, 0, sizeof(state->analog_out));
state->analog_sample_counter = 0;