radio95/fm95
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add option to dynamically configure volume levels in the config file (bro really feels like a professional dev)

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This commit is contained in:
KubaPro010
2025-07-06 22:04:55 +02:00
parent f9465cd1f5
commit cc35da31e3
1 changed files with 33 additions and 7 deletions
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40
src/fm95.c
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@@ -38,11 +38,11 @@
#define DEFAULT_AUDIO_VOLUME 1.0f // Audio volume, before clipper
#define DEFAULT_AUDIO_PREAMP 1.0f // Audio volume, but before all the filters
#define MONO_VOLUME 0.45f // 45%
#define PILOT_VOLUME 0.09f // 9%
#define STEREO_VOLUME 0.3f // 30%
#define RDS_VOLUME 0.0475f // 4.75%
#define RDS_VOLUME_STEP 0.9f // 90%, so RDS2 stream 4 is 90% of stream 3 which is 90% of stream 2, which again is 90% of stream 1...
#define DEFAULT_MONO_VOLUME 0.45f // 45%
#define DEFAULT_PILOT_VOLUME 0.09f // 9%
#define DEFAULT_STEREO_VOLUME 0.3f // 30%
#define DEFAULT_RDS_VOLUME 0.0475f // 4.75%
#define DEFAULT_RDS_VOLUME_STEP 0.9f // 90%, so RDS2 stream 4 is 90% of stream 3 which is 90% of stream 2, which again is 90% of stream 1...
static volatile sig_atomic_t to_run = 1;
@@ -50,6 +50,15 @@ inline float hard_clip(float sample, float threshold) { return fmaxf(-threshold,
typedef struct
{
float mono;
float pilot;
float stereo;
float rds;
float rds_step;
} FM95_Volumes;
typedef struct
{
FM95_Volumes volumes;
uint8_t stereo;
uint8_t rds_streams;
@@ -160,7 +169,7 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime) {
init_modulation_power_measure(&power, config.sample_rate);
StereoEncoder stencode;
init_stereo_encoder(&stencode, 4.0f, &osc, (config.stereo == 2), MONO_VOLUME, PILOT_VOLUME, STEREO_VOLUME);
init_stereo_encoder(&stencode, 4.0f, &osc, (config.stereo == 2), config.volumes.mono, config.volumes.pilot, config.volumes.stereo);
float bs412_audio_gain = 1.0f;
float bs412_attack_alpha = expf(-1.0f / (config.bs412_attack * config.sample_rate));
@@ -219,7 +228,7 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime) {
for(uint8_t stream = 0; stream < config.rds_streams; stream++) {
uint8_t osc_stream = 12+stream; // If the osc is a 4750 sine wave, then doing this would mean that stream 0 is 12, so 57 khz
if(osc_stream == 13) osc_stream++; // 61.75 KHz is not used, idk why but would be cool if it was
mpx += (rds_in[config.rds_streams*i+stream]*get_oscillator_cos_multiplier_ni(&osc, osc_stream)) * (RDS_VOLUME * powf(RDS_VOLUME_STEP, stream));
mpx += (rds_in[config.rds_streams*i+stream]*get_oscillator_cos_multiplier_ni(&osc, osc_stream)) * (config.volumes.rds * powf(config.volumes.rds_step, stream));
}
}
@@ -346,6 +355,16 @@ static int config_handler(void* user, const char* section, const char* name, con
pconfig->bs412_attack = strtof(value, NULL);
} else if(MATCH("advanced", "bs412_release")) {
pconfig->bs412_release = strtof(value, NULL);
} else if(MATCH("volumes", "mono")) {
pconfig->volumes.mono = strtof(value, NULL);
} else if(MATCH("volumes", "pilot")) {
pconfig->volumes.pilot = strtof(value, NULL);
} else if(MATCH("volumes", "stereo")) {
pconfig->volumes.stereo = strtof(value, NULL);
} else if(MATCH("volumes", "rds")) {
pconfig->volumes.rds = strtof(value, NULL);
} else if(MATCH("volumes", "rds_step")) {
pconfig->volumes.rds_step = strtof(value, NULL);
} else {
return 0; // Unknown section/name
}
@@ -420,6 +439,13 @@ int main(int argc, char **argv) {
printf("fm95 (an FM Processor by radio95) version 2.2\n");
FM95_Config config = {
.volumes = {
.mono = DEFAULT_MONO_VOLUME,
.pilot = DEFAULT_PILOT_VOLUME,
.stereo = DEFAULT_STEREO_VOLUME,
.rds = DEFAULT_RDS_VOLUME,
.rds_step = DEFAULT_RDS_VOLUME_STEP
},
.stereo = DEFAULT_STEREO,
.rds_streams = DEFAULT_RDS_STREAMS,