radio95/fm95
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Code Issues Activity

add error checking

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This commit is contained in:
KubaPro010
2025-01-01 12:18:43 +01:00
parent 9c5675fbd4
commit 62e698ea52
4 changed files with 29 additions and 15 deletions
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11
src/sca_mod.c
View File

@@ -122,11 +122,13 @@ int main() {
signal(SIGINT, stop);
signal(SIGTERM, stop);
int pulse_error;
float input[BUFFER_SIZE]; // Input from device
float signal[BUFFER_SIZE]; // this goes to the output
while (to_run) {
if (pa_simple_read(input_device, input, sizeof(input), NULL) < 0) {
fprintf(stderr, "Error reading from input device.\n");
if (pa_simple_read(input_device, input, sizeof(input), &pulse_error) < 0) {
fprintf(stderr, "Error reading from input device: %s\n", pa_strerror(pulse_error));
to_run = 0;
break;
}
@@ -155,8 +157,9 @@ int main() {
signal[i] = get_oscillator_sin_sample(&osc)*VOLUME;
}
if (pa_simple_write(output_device, signal, sizeof(signal), NULL) < 0) {
fprintf(stderr, "Error writing to output device.\n");
if (pa_simple_write(output_device, signal, sizeof(signal), &pulse_error) < 0) {
fprintf(stderr, "Error writing to output device: %s\n", pa_strerror(pulse_error));
to_run = 0;
break;
}
}

20
src/ssb_stereo_coder.c
View File

@@ -13,6 +13,7 @@
// Features
#include "features.h"
#define USB
#define SAMPLE_RATE 192000 // Don't go lower than 108 KHz, becuase it (53000*2) and (38000+15000)
@@ -140,12 +141,14 @@ int main() {
signal(SIGINT, stop);
signal(SIGTERM, stop);
int pulse_error;
float input[BUFFER_SIZE*2]; // Input from device, interleaved stereo
float left[BUFFER_SIZE+64], right[BUFFER_SIZE+64]; // Audio, same thing as in input but ininterleaved, ai told be there could be a buffer overflow here
float mpx[BUFFER_SIZE]; // MPX, this goes to the output
while (to_run) {
if (pa_simple_read(input_device, input, sizeof(input), NULL) < 0) {
fprintf(stderr, "Error reading from input device.\n");
if (pa_simple_read(input_device, input, sizeof(input), &pulse_error) < 0) {
fprintf(stderr, "Error reading from input device: %s\n", pa_strerror(pulse_error));
to_run = 0;
break;
}
uninterleave(input, left, right, BUFFER_SIZE*2);
@@ -188,15 +191,20 @@ int main() {
float stereo = (current_left_input - current_right_input) / 2.0f; // Also Stereo to Mono but a bit diffrent
float stereo_i, stereo_q;
apply_hilbert(&hilbert, stereo, &stereo_i, &stereo_q); // I/Q, the Quadrature data is 90 degrees apart from the In-phase data
float lsb = (stereo_i*cos38-stereo_q*(sin38*0.73f)); // Compute LSB, as the Hilbert isn't perfect, i'll have to a bit silence down the Q carrier in order to make it better, also, it is just perfect as FM Stereo LSB shouldn't be fully LSB
#ifdef USB
float signal = (stereo_i*cos38+stereo_q*(sin38*0.73f)); // Compute LSB/USB, as the Hilbert isn't perfect, i'll have to a bit silence down the Q carrier in order to make it better, also, it is just perfect as FM Stereo LSB shouldn't be fully LSB
#else
float signal = (stereo_i*cos38-stereo_q*(sin38*0.73f)); // Compute LSB/USB, as the Hilbert isn't perfect, i'll have to a bit silence down the Q carrier in order to make it better, also, it is just perfect as FM Stereo LSB shouldn't be fully LSB
#endif
mpx[i] = delay_line(&monoDelay, mono) * MONO_VOLUME +
pilot * PILOT_VOLUME +
lsb *STEREO_VOLUME;
signal*STEREO_VOLUME;
}
if (pa_simple_write(output_device, mpx, sizeof(mpx), NULL) < 0) {
fprintf(stderr, "Error writing to output device.\n");
if (pa_simple_write(output_device, mpx, sizeof(mpx), &pulse_error) < 0) {
fprintf(stderr, "Error writing to output device: %s\n", pa_strerror(pulse_error));
to_run = 0;
break;
}
}

11
src/stereo_coder.c
View File

@@ -135,12 +135,14 @@ int main() {
signal(SIGINT, stop);
signal(SIGTERM, stop);
int pulse_error;
float input[BUFFER_SIZE*2]; // Input from device, interleaved stereo
float left[BUFFER_SIZE+64], right[BUFFER_SIZE+64]; // Audio, same thing as in input but ininterleaved, ai told be there could be a buffer overflow here
float mpx[BUFFER_SIZE]; // MPX, this goes to the output
while (to_run) {
if (pa_simple_read(input_device, input, sizeof(input), NULL) < 0) {
fprintf(stderr, "Error reading from input device.\n");
if (pa_simple_read(input_device, input, sizeof(input), &pulse_error) < 0) {
fprintf(stderr, "Error reading from input device: %s\n", pa_strerror(pulse_error));
to_run = 0;
break;
}
uninterleave(input, left, right, BUFFER_SIZE*2);
@@ -185,8 +187,9 @@ int main() {
(stereo * stereo_carrier) * STEREO_VOLUME; // DSB-SC modulation
}
if (pa_simple_write(output_device, mpx, sizeof(mpx), NULL) < 0) {
fprintf(stderr, "Error writing to output device.\n");
if (pa_simple_write(output_device, mpx, sizeof(mpx), &pulse_error) < 0) {
fprintf(stderr, "Error writing to output device: %s\n", pa_strerror(pulse_error));
to_run = 0;
break;
}
}