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add darc docs as well as a calibration mode

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KubaPro010
2025-05-27 19:47:44 +02:00
parent ef3bbdc2e4
commit 7909b67ce4
2 changed files with 15 additions and 10 deletions
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specifications/fm95/DARC_en_300751v010201p.pdf Normal file
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src/fm95.c
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@@ -108,9 +108,9 @@ void show_help(char *name) {
"\t-F,--sca_dev\tOverride the SCA deviation [default: %.2f]\n"
"\t-C,--sca_clip\tOverride the SCA clipper threshold [default: %.2f]\n"
"\t-c,--clipper\tOverride the clipper threshold [default: %.2f]\n"
"\t-P,--polar\tForce Polar Stereo (does not take effect with -m%s)\n"
"\t-O,--polar\tForce Polar Stereo (does not take effect with -m%s)\n"
"\t-R,--preemp\tOverride preemphasis [default: %.2f µs]\n"
"\t-V,--calibrate\tEnable Calibration mode [default: off]\n"
"\t-V,--calibrate\tEnable Calibration mode [default: off, option 2 enables a 60 hz square wave instead of the 400 hz sine wave]\n"
"\t-p,--power\tSet the MPX power [default: %.1f]\n"
"\t-P,--mpx_dev\tSet the MPX deviation [default: %.1f]\n"
"\t-A,--master_vol\tSet master volume [default: %.3f]\n"
@@ -188,7 +188,7 @@ int main(int argc, char **argv) {
// #region Parse Arguments
int opt;
const char *short_opt = "s::i:o:M:r:S:d:f:F:C:c:P::R:Vp:P:A:v:D:h";
const char *short_opt = "s::i:o:M:r:S:d:f:F:C:c:O::R:V::p:P:A:v:D:h";
struct option long_opt[] =
{
{"stereo", optional_argument, NULL, 's'},
@@ -202,9 +202,9 @@ int main(int argc, char **argv) {
{"sca_dev", required_argument, NULL, 'F'},
{"sca_clip", required_argument, NULL, 'C'},
{"clipper", required_argument, NULL, 'c'},
{"polar", optional_argument, NULL, 'P'},
{"polar", optional_argument, NULL, 'O'},
{"preemp", required_argument, NULL, 'R'},
{"calibrate", no_argument, NULL, 'V'},
{"calibrate", optional_argument, NULL, 'V'},
{"power", required_argument, NULL, 'p'},
{"mpx_dev", required_argument, NULL, 'P'},
{"master_vol", required_argument, NULL, 'A'},
@@ -251,7 +251,7 @@ int main(int argc, char **argv) {
case 'c': //Clipper
clipper_threshold = strtof(optarg, NULL);
break;
case 'P': //Polar
case 'O': //Polar
if(optarg) polar_stereo = atoi(optarg);
else polar_stereo = 1;
break;
@@ -259,7 +259,8 @@ int main(int argc, char **argv) {
preemphasis_tau = strtof(optarg, NULL)*1.0e-6f;
break;
case 'V': // Calibration
calibration_mode = 1;
if(optarg) calibration_mode = atoi(optarg);
else calibration_mode = 1;
break;
case 'p': // Power
mpx_power = strtof(optarg, NULL);
@@ -373,9 +374,9 @@ int main(int argc, char **argv) {
}
// #endregion
if(calibration_mode) {
if(calibration_mode != 0) {
Oscillator osc;
init_oscillator(&osc, 400, sample_rate);
init_oscillator(&osc, (calibration_mode == 2) ? 60 : 400, sample_rate);
signal(SIGINT, stop);
signal(SIGTERM, stop);
@@ -383,7 +384,11 @@ int main(int argc, char **argv) {
float output[BUFFER_SIZE];
while(to_run) {
for (int i = 0; i < BUFFER_SIZE; i++) output[i] = get_oscillator_sin_sample(&osc)*master_volume;
for (int i = 0; i < BUFFER_SIZE; i++) {
float sample = get_oscillator_sin_sample(&osc);
if(calibration_mode == 2) sample = (sample > 0.0f) ? 1.0f : -1.0f;
output[i] = sample*master_volume;
}
if((pulse_error = write_PulseOutputDevice(&output_device, output, sizeof(output)))) { // get output from the function and assign it into pulse_error, this comment to avoid confusion
fprintf(stderr, "Error writing to output device: %s\n", pa_strerror(pulse_error));
to_run = 0;