radio95/fm95
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Code Issues Activity

add a deviation option, to easily limit deviation

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This commit is contained in:
KubaPro010
2025-05-02 09:43:06 +02:00
parent 6c4aedc2c8
commit 58ddbc761c
2 changed files with 17 additions and 9 deletions
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2
.vscode/.server-controller-port.log vendored
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@@ -1,5 +1,5 @@
{
"port": 13452,
"time": 1745750934180,
"time": 1746171059613,
"version": "0.0.3"
}

24
src/fm95.c
View File

@@ -19,6 +19,7 @@
#define DEFAULT_PREEMPHASIS_TAU 50e-6 // Europe, the freedomers use 75µs
#define DEFAULT_MPX_POWER 3.0f // dbr, this is for BS412, simplest bs412
#define DEFAULT_MPX_DEVIATION 75000.0f // for BS412
#define DEFAULT_DEVIATION 75000.0f // another way to set the volume
#include "../dsp/oscillator.h"
#include "../dsp/filters.h"
@@ -42,12 +43,13 @@
#define DEFAULT_MASTER_VOLUME 1.0f // Volume of everything combined, for calibration
#define DEFAULT_AUDIO_VOLUME 1.0f // Audio volume, before clipper
#define MONO_VOLUME 0.45f
#define PILOT_VOLUME 0.09f
#define STEREO_VOLUME 0.3f
#define RDS_VOLUME 0.06f
#define RDS2_VOLUME 0.045f
#define SCA_VOLUME 0.1f
#define MONO_VOLUME 0.45f // 45%
#define PILOT_VOLUME 0.09f // 9%
#define STEREO_VOLUME 0.3f // 30%
#define RDS_VOLUME 0.06f // 6%
#define RDS2_VOLUME 0.045f // 4.5%
#define SCA_VOLUME 0.1f // 10%, needs to be high because this is analog
#define MPX_VOLUME 1.0f
#define MPX_CLIPPER_THRESHOLD 1.0f
@@ -102,6 +104,7 @@ void show_help(char *name) {
"\t-d,--mpx_dev\tSet the MPX deviation [default: %.1f]\n"
"\t-A,--master_vol\tSet master volume [default: %.3f]\n"
"\t-v,--audio_vol\tSet audio volume [default: %.3f]\n"
"\t-D,--deviation\tSet audio volume, but with the deviation (100%% being 75000) [default: %d]\n"
,name
,DEFAULT_STEREO
,INPUT_DEVICE
@@ -131,6 +134,7 @@ void show_help(char *name) {
,DEFAULT_MPX_DEVIATION
,DEFAULT_MASTER_VOLUME
,DEFAULT_AUDIO_VOLUME
,DEFAULT_DEVIATION
);
}
@@ -167,7 +171,7 @@ int main(int argc, char **argv) {
// #region Parse Arguments
int opt;
const char *short_opt = "s::i:o:M:r:C:f:F:L:c:P::R:Vp:d:A:v:h";
const char *short_opt = "s::i:o:M:r:C:f:F:L:c:P::R:Vp:d:A:v:d:h";
struct option long_opt[] =
{
{"stereo", optional_argument, NULL, 's'},
@@ -187,6 +191,7 @@ int main(int argc, char **argv) {
{"mpx_dev", required_argument, NULL, 'd'},
{"master_vol", required_argument, NULL, 'A'},
{"audio_vol", required_argument, NULL, 'v'},
{"deviation", required_argument, NULL, 'D'},
{"help", no_argument, NULL, 'h'},
{0, 0, 0, 0}
@@ -230,7 +235,7 @@ int main(int argc, char **argv) {
else polar_stereo = 1;
break;
case 'R': // Preemp
preemphasis_tau = strtof(optarg, NULL)*0.000001;
preemphasis_tau = strtof(optarg, NULL)*1.0e-6f;
break;
case 'V': // Calibration
calibration_mode = 1;
@@ -247,6 +252,9 @@ int main(int argc, char **argv) {
case 'v': // Audio Volume
audio_volume = strtof(optarg, NULL);
break;
case 'D': // Deviation
master_volume *= ((float)atoi(optarg)/75000.0f);
break;
case 'h':
show_help(argv[0]);
return 1;