radio95/fm95
0
1
Fork 0
mirror of https://github.com/radio95-rnt/fm95.git synced 2026-02-26 19:23:51 +01:00
Code Issues Activity

add a rds input

Browse Source
This commit is contained in:
KubaPro010
2025-03-09 16:43:28 +01:00
parent 0adf6ef52d
commit ae15c0de1a
2 changed files with 59 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
README.md
View File

@@ -8,6 +8,7 @@ FM95 is a audio processor for FM, it does:
Supports 2 inputs:
- Audio (via Pulse)
- MPX (via Pulse)
- RDS (via Pulse, expects unmodulated RDS)
- SCA (via Pulse)
and one output:

61
src/fm95.c
View File

@@ -23,6 +23,7 @@
#define INPUT_DEVICE "FM_Audio.monitor"
#define OUTPUT_DEVICE "alsa_output.platform-soc_sound.stereo-fallback"
#define RDS_DEVICE "RDS.monitor"
#define MPX_DEVICE "FM_MPX.monitor"
// #define SCA_DEVICE ""
@@ -36,6 +37,7 @@
#define MONO_VOLUME 0.45f // L+R Signal
#define PILOT_VOLUME 0.09f // 19 KHz Pilot
#define STEREO_VOLUME 0.45f // L-R signal, should be same as MONO
#define RDS_VOLUME 0.075f // RDS Volume
#define SCA_VOLUME 0.1f // FM SCA signal, 10%
#define MPX_VOLUME 1.0f // Passtrough
#define MPX_CLIPPER_THRESHOLD 1.0f
@@ -57,7 +59,7 @@ static void stop(int signum) {
}
void show_version() {
printf("fm95 (an FM Processor by radio95) version 1.3\n");
printf("fm95 (an FM Processor by radio95) version 1.4\n");
}
void show_help(char *name) {
printf(
@@ -67,6 +69,7 @@ void show_help(char *name) {
" -i,--input Override input device [default: %s]\n"
" -o,--output Override output device [default: %s]\n"
" -M,--mpx Override MPX input device [default: %s]\n"
" -r,--rds Override RDS input device [default: %s]\n"
" -C,--sca Override the SCA input device [default: %s]\n"
" -f,--sca_freq Override the SCA frequency [default: %.1f]\n"
" -F,--sca_dev Override the SCA deviation [default: %.2f]\n"
@@ -88,6 +91,11 @@ void show_help(char *name) {
#else
,"not set"
#endif
#ifdef RDS_DEVICE
,RDS_DEVICE
#else
,"not set"
#endif
#ifdef SCA_DEVICE
,SCA_DEVICE
#else
@@ -109,6 +117,7 @@ int main(int argc, char **argv) {
show_version();
pa_simple *mpx_device;
pa_simple *rds_device;
pa_simple *sca_device;
pa_simple *output_device;
@@ -122,11 +131,16 @@ int main(int argc, char **argv) {
char audio_input_device[64] = INPUT_DEVICE;
char audio_output_device[64] = OUTPUT_DEVICE;
#ifndef MPX_DEVICE
#ifndef MPX_DEVICE
char audio_mpx_device[64] = "\0";
#else
char audio_mpx_device[64] = MPX_DEVICE;
#endif
#ifndef RDS_DEVICE
char audio_rds_device[64] = "\0";
#else
char audio_rds_device[64] = RDS_DEVICE;
#endif
#ifndef SCA_DEVICE
char audio_sca_device[64] = "\0";
#else
@@ -181,6 +195,9 @@ int main(int argc, char **argv) {
case 'M': //MPX in
memcpy(audio_mpx_device, optarg, 63);
break;
case 'r': // RDS in
memcpy(audio_rds_device, optarg, 63);
break;
case 'C': //SCA in
memcpy(audio_sca_device, optarg, 63);
break;
@@ -285,6 +302,27 @@ int main(int argc, char **argv) {
return 1;
}
}
if(strlen(audio_rds_device) != 0) {
printf("Connecting to RDS device... (%s)\n", audio_rds_device);
rds_device = pa_simple_new(
NULL,
"fm95",
PA_STREAM_RECORD,
audio_rds_device,
"RDS Input",
&mono_format,
NULL,
&input_buffer_atr,
&opentime_pulse_error
);
if (!rds_device) {
fprintf(stderr, "Error: cannot open RDS device: %s\n", pa_strerror(opentime_pulse_error));
pa_simple_free(input_device);
pa_simple_free(mpx_device);
return 1;
}
}
if(strlen(audio_sca_device) != 0) {
printf("Connecting to SCA device... (%s)\n", audio_sca_device);
@@ -303,6 +341,7 @@ int main(int argc, char **argv) {
fprintf(stderr, "Error: cannot open SCA device: %s\n", pa_strerror(opentime_pulse_error));
pa_simple_free(input_device);
if(strlen(audio_mpx_device) != 0) pa_simple_free(mpx_device);
if(strlen(audio_rds_device) != 0) pa_simple_free(rds_device);
return 1;
}
}
@@ -324,6 +363,7 @@ int main(int argc, char **argv) {
fprintf(stderr, "Error: cannot open output device: %s\n", pa_strerror(opentime_pulse_error));
pa_simple_free(input_device);
if(strlen(audio_mpx_device) != 0) pa_simple_free(mpx_device);
if(strlen(audio_rds_device) != 0) pa_simple_free(rds_device);
if(strlen(audio_sca_device) != 0) pa_simple_free(sca_device);
return 1;
}
@@ -351,6 +391,7 @@ int main(int argc, char **argv) {
printf("Cleaning up...\n");
pa_simple_free(input_device);
if(strlen(audio_mpx_device) != 0) pa_simple_free(mpx_device);
if(strlen(audio_rds_device) != 0) pa_simple_free(rds_device);
if(strlen(audio_sca_device) != 0) pa_simple_free(sca_device);
pa_simple_free(output_device);
return 0;
@@ -375,6 +416,7 @@ int main(int argc, char **argv) {
float audio_stereo_input[BUFFER_SIZE*2]; // Input from device, interleaved stereo
float mpx_in[BUFFER_SIZE] = {0}; // Input from MPX device
float rds_in[BUFFER_SIZE] = {0}; // Input from RDS device
float sca_in[BUFFER_SIZE] = {0}; // Input from SCA device
float left[BUFFER_SIZE+64], right[BUFFER_SIZE+64]; // Audio, same thing as in input but uninterleaved, ai told be there could be a buffer overflow here
float output[BUFFER_SIZE]; // MPX, this goes to the output
@@ -392,6 +434,13 @@ int main(int argc, char **argv) {
break;
}
}
if(strlen(audio_rds_device) != 0) {
if (pa_simple_read(rds_device, rds_in, sizeof(rds_in), &pulse_error) < 0) {
fprintf(stderr, "Error reading from RDS device: %s\n", pa_strerror(pulse_error));
to_run = 0;
break;
}
}
if(strlen(audio_sca_device) != 0) {
if (pa_simple_read(sca_device, sca_in, sizeof(sca_in), &pulse_error) < 0) {
fprintf(stderr, "Error reading from SCA device: %s\n", pa_strerror(pulse_error));
@@ -404,6 +453,7 @@ int main(int argc, char **argv) {
float l_in = left[i];
float r_in = right[i];
float current_mpx_in = mpx_in[i];
float current_rds_in = rds_in[i];
float current_sca_in = sca_in[i];
float ready_l = apply_preemphasis(&preemp_l, l_in)*2;
@@ -415,7 +465,11 @@ int main(int argc, char **argv) {
output[i] = mono*MONO_VOLUME;
if(stereo == 1) {
float stereo = (ready_l - ready_r) / 2.0f; // Also Stereo to Mono but a bit diffrent
float stereo_carrier = get_oscillator_sin_multiplier_ni(&osc, polar_stereo ? 1 : 2);
float stereo_carrier = get_oscillator_sin_multiplier_ni(&osc, polar_stereo ? 1 : 2);
if((strlen(audio_rds_device) != 0) && polar_stereo == 0) {
float rds_carrier = get_oscillator_sin_multiplier_ni(&osc, 3);
output[i] += (rds_in*rds_carrier)*RDS_VOLUME;
}
if(polar_stereo) {
output[i] += ((stereo+0.2)*stereo_carrier)*STEREO_VOLUME;
} else {
@@ -439,6 +493,7 @@ int main(int argc, char **argv) {
printf("Cleaning up...\n");
pa_simple_free(input_device);
if(strlen(audio_mpx_device) != 0) pa_simple_free(mpx_device);
if(strlen(audio_rds_device) != 0) pa_simple_free(rds_device);
if(strlen(audio_sca_device) != 0) pa_simple_free(sca_device);
pa_simple_free(output_device);
return 0;