radio95/fm95
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slight changes

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This commit is contained in:
KubaPro010
2024-12-30 16:09:31 +01:00
parent f98999fe76
commit e07b35c5c6
1 changed files with 10 additions and 10 deletions
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20
stereo_coder.c
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@@ -8,11 +8,11 @@
#define INPUT_DEVICE "real_real_tx_audio_input.monitor" #define INPUT_DEVICE "real_real_tx_audio_input.monitor"
#define OUTPUT_DEVICE "alsa_output.platform-soc_sound.stereo-fallback" #define OUTPUT_DEVICE "alsa_output.platform-soc_sound.stereo-fallback"
#define BUFFER_SIZE 512 #define BUFFER_SIZE 512
#define CLIPPER_THRESHOLD 0.5 // Adjust this as needed #define CLIPPER_THRESHOLD 0.45 // Adjust this as needed
#define MONO_VOLUME 0.5f // L+R Signal #define MONO_VOLUME 0.5f // L+R Signal
#define PILOT_VOLUME 0.025f // 19 KHz Pilot #define PILOT_VOLUME 0.02f // 19 KHz Pilot
#define STEREO_VOLUME 0.275f // L-R signal #define STEREO_VOLUME 0.4f // L-R signal
volatile sig_atomic_t to_run = 1; volatile sig_atomic_t to_run = 1;
@@ -140,10 +140,10 @@ int main() {
signal(SIGINT, stop); signal(SIGINT, stop);
signal(SIGTERM, stop); signal(SIGTERM, stop);
int16_t input[BUFFER_SIZE*2]; int16_t input[BUFFER_SIZE*2]; // Input from device
float left[BUFFER_SIZE], right[BUFFER_SIZE]; float left[BUFFER_SIZE], right[BUFFER_SIZE]; // Audio
float mpx[BUFFER_SIZE]; float mpx[BUFFER_SIZE]; // MPX
int16_t output[BUFFER_SIZE]; int16_t output[BUFFER_SIZE]; // Output to device
while (to_run) { while (to_run) {
if (pa_simple_read(input_device, input, sizeof(input), NULL) < 0) { if (pa_simple_read(input_device, input, sizeof(input), NULL) < 0) {
fprintf(stderr, "Error reading from input device.\n"); fprintf(stderr, "Error reading from input device.\n");
@@ -161,9 +161,9 @@ int main() {
float mono = (current_left + current_right) / 2.0f; float mono = (current_left + current_right) / 2.0f;
float stereo = (current_left - current_right) / 2.0f; float stereo = (current_left - current_right) / 2.0f;
mpx[i] = mono*MONO_VOLUME + mpx[i] = mono * MONO_VOLUME +
(stereo * stereo_carrier)*STEREO_VOLUME + pilot * PILOT_VOLUME +
(pilot * PILOT_VOLUME); (stereo * stereo_carrier) * STEREO_VOLUME;
} }
float_array_to_s16le(mpx, output, BUFFER_SIZE); float_array_to_s16le(mpx, output, BUFFER_SIZE);