radio95/fm95
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Code Issues Activity

litlle bit optimizations on init

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This commit is contained in:
KubaPro010
2025-08-04 14:34:16 +02:00
parent de8f4de914
commit 12e54f44e2
4 changed files with 16 additions and 15 deletions
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2
.vscode/.server-controller-port.log vendored
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@@ -1,5 +1,5 @@
{
"port": 13452,
"time": 1754247434245,
"time": 1754309288735,
"version": "0.0.3"
}

4
.vscode/settings.json vendored
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@@ -43,7 +43,9 @@
"thread": "c",
"vector": "c",
"stereo_encoder.h": "c",
"iir.h": "c"
"iir.h": "c",
"compare": "c",
"cstdint": "c"
},
"C_Cpp.errorSquiggles": "disabled"
}

2
fm95.md
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@@ -29,7 +29,7 @@ Sets the peak to peak value of the Audio Clipper, defaults to one, but can be di
### preemphasis
Sets the Preemphasis tau, basically how much highs is boosted, by default and in Europe it is 50µs, but in the USA and South Korea, use 75µs. Expects unit in microseconds
Sets the Preemphasis tau, basically how much highs is boosted, by default and in Europe it is 50µs, but in the USA and South Korea, use 75µs. Expects unit in integer microseconds
### calibration

23
src/fm95.c
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@@ -45,8 +45,8 @@ typedef struct
uint8_t rds_streams;
float clipper_threshold;
float preemphasis;
float tilt;
uint8_t preemphasis;
int8_t tilt;
uint8_t calibration;
float mpx_power;
float mpx_deviation;
@@ -57,7 +57,6 @@ typedef struct
uint32_t sample_rate;
// ini dont edit
char ini_config_path[64];
uint8_t lpf_order;
@@ -216,9 +215,9 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime) {
r = apply_preemphasis(&runtime->preemp_r, r);
}
if(config.clipper_threshold != 0) {
l = hard_clip(l*config.audio_volume, config.clipper_threshold);
r = hard_clip(r*config.audio_volume, config.clipper_threshold);
if (config.clipper_threshold != 0) {
l = hard_clip(l * config.audio_volume, config.clipper_threshold);
r = hard_clip(r * config.audio_volume, config.clipper_threshold);
}
mpx = stereo_encode(&runtime->stencode, config.stereo, l, r);
@@ -307,7 +306,7 @@ static int config_handler(void* user, const char* section, const char* name, con
} else if (MATCH("fm95", "clipper_threshold")) {
pconfig->clipper_threshold = strtof(value, NULL);
} else if (MATCH("fm95", "preemphasis")) {
pconfig->preemphasis = strtof(value, NULL) * 1.0e-6f;
pconfig->preemphasis = atoi(value);
} else if (MATCH("fm95", "calibration")) {
pconfig->calibration = atoi(value);
} else if (MATCH("fm95", "mpx_power")) {
@@ -323,7 +322,7 @@ static int config_handler(void* user, const char* section, const char* name, con
} else if (MATCH("fm95", "deviation")) {
pconfig->audio_deviation = strtof(value, NULL);
} else if(MATCH("fm95", "tilt")) {
pconfig->tilt = strtof(value, NULL);
pconfig->tilt = strtof(value, NULL) * 127.0f;
} else if(MATCH("fm95", "bs412_max")) {
pconfig->bs412_max = strtof(value, NULL);
} else if(MATCH("fm95", "agc_target")) {
@@ -446,8 +445,8 @@ void init_runtime(FM95_Runtime* runtime, FM95_Config config, bool rds_on) {
}
if(config.preemphasis != 0) {
init_preemphasis(&runtime->preemp_l, config.preemphasis, config.sample_rate, config.preemp_unity_freq);
init_preemphasis(&runtime->preemp_r, config.preemphasis, config.sample_rate, config.preemp_unity_freq);
init_preemphasis(&runtime->preemp_l, (float)config.preemphasis * 1.0e-6f, config.sample_rate, config.preemp_unity_freq);
init_preemphasis(&runtime->preemp_r, (float)config.preemphasis * 1.0e-6f, config.sample_rate, config.preemp_unity_freq);
}
float last_gain = 0.0f;
@@ -455,7 +454,7 @@ void init_runtime(FM95_Runtime* runtime, FM95_Config config, bool rds_on) {
init_bs412(&runtime->bs412, config.mpx_deviation, config.mpx_power, config.bs412_attack, config.bs412_release, config.bs412_max, config.sample_rate);
runtime->bs412.gain = last_gain;
if(config.tilt != 0) tilt_init(&runtime->tilter, config.tilt);
if(config.tilt != 0) tilt_init(&runtime->tilter, (float)config.tilt / 127.0f);
init_stereo_encoder(&runtime->stencode, 4.0f, &runtime->osc, (config.stereo == 2), config.volumes.mono, config.volumes.pilot, config.volumes.stereo);
@@ -485,7 +484,7 @@ int main(int argc, char **argv) {
.rds_streams = 1, // You have to match this with RDS95, otherwise may god have mercy on your RDS decoders
.clipper_threshold = 1.0f, // At what level for the clipper to work, 1.0f, clips the audio at 1 volt peak to peak, so it will be always between -1 and 1
.preemphasis = 50e-6, // Europe, the "freedomers" use 75µs (75e-6)
.preemphasis = 50, // Europe, the "freedomers" use 75µs
.tilt = 0, // Off
.calibration = 0, // Off
.mpx_power = 3.0f, // dbr, this is for BS412, simplest bs412