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RTL RMS Tests to Reduce CPU Usage;

This commit is contained in:
lwvmobile 2023-09-18 10:51:22 -04:00
parent eb5de342ba
commit 2161c3d762
3 changed files with 19 additions and 15 deletions
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12
src/dsd_main.c
View File

@ -1369,12 +1369,12 @@ liveScanner (dsd_opts * opts, dsd_state * state)
{
open_rtlsdr_stream(opts);
opts->rtl_started = 1; //set here so ncurses terminal doesn't attempt to open it again
#ifdef __arm__
fprintf (stderr, "WARNING: RMS Function is Disabled on ARM Devices (Raspberry Pi) due to High CPU use. \n");
fprintf (stderr, "RMS/Squelch Functionality for NXDN, dPMR, EDACS Analog, M17 and Raw Audio Monitor are unavailable and these modes will not function properly. \n");
if (opts->monitor_input_audio == 1) opts->monitor_input_audio = 0;
opts->rtl_squelch_level = 0;
#endif
// #ifdef __arm__
// fprintf (stderr, "WARNING: RMS Function is Disabled on ARM Devices (Raspberry Pi) due to High CPU use. \n");
// fprintf (stderr, "RMS/Squelch Functionality for NXDN, dPMR, EDACS Analog, M17 and Raw Audio Monitor are unavailable and these modes will not function properly. \n");
// if (opts->monitor_input_audio == 1) opts->monitor_input_audio = 0;
// opts->rtl_squelch_level = 0;
// #endif
}
#endif

8
src/edacs-fme.c
View File

@ -642,10 +642,10 @@ void edacs(dsd_opts * opts, dsd_state * state)
fprintf (stderr, " Digital");
//skip analog calls on RTL Input on ARM devices due to High CPU usage from RTL RMS function
#ifdef __arm__
if (command == 0xEE && opts->audio_in_type == 3)
goto ENDPV;
#endif
// #ifdef __arm__
// if (command == 0xEE && opts->audio_in_type == 3)
// goto ENDPV;
// #endif
//skip analog calls on UDP Audio Output
if (command == 0xEE && opts->audio_out_type == 8)

14
src/rtl_sdr_fm.cpp
View File

@ -1130,11 +1130,15 @@ void rtl_dev_tune(dsd_opts * opts, long int frequency)
long int rtl_return_rms()
{
long int sr = 0;
#ifdef __arm__
sr = 100;
#else
sr = rms(demod.lowpassed, demod.lp_len, 1);
#endif
// #ifdef __arm__
// sr = 100;
// #else
//debug -- on main machine, lp_len is around 6420, so this probably contributes to very high CPU usage
// fprintf (stderr, "LP_LEN: %d \n", demod.lp_len);
//I've found that just using a sample size of 160 will give us a good approximation without killing the CPU
// sr = rms(demod.lowpassed, demod.lp_len, 1);
sr = rms(demod.lowpassed, 160, 1); //I wonder what a reasonable value would be for #2 (input len) there
// #endif
return (sr);
}