radio95/fm95
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bs412 knee

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This commit is contained in:
kuba
2026-05-10 17:42:47 +02:00
parent ae8ee99342
commit 3fd82cc1ed
3 changed files with 57 additions and 19 deletions
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src/fm95.c
+17 -4
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@@ -3,7 +3,7 @@
#include "../inih/ini.h"
#include <stdbool.h>
#define DEFAULT_INI_PATH "/etc/fm95.conf"
#define DEFAULT_INI_PATH "/etc/fm95/fm95.conf"
#define buffer_maxlength 99960
#define buffer_tlength_fragsize 99960
@@ -67,6 +67,7 @@ typedef struct {
float bs412_release;
float bs412_max;
float bs412_gate;
float bs412_knee;
float lpf_cutoff;
} FM95_Config;
@@ -221,7 +222,7 @@ int run_fm95(FM95_Config* config, FM95_Runtime* runtime, FM95_RunResult* result)
l *= agc_gain;
r *= agc_gain;
temp_result.agc_gain = agc_gain;
}
} else temp_result.agc_gain = 0.0f;
float mod_l, mod_r;
@@ -334,6 +335,7 @@ static int config_handler(void* user, const char* section, const char* name, con
else if(MATCH("fm95", "bs412_release")) pconfig->bs412_release = strtof(value, NULL);
else if(MATCH("fm95", "bs412_max")) pconfig->bs412_max = strtof(value, NULL);
else if(MATCH("fm95", "bs412_gate")) pconfig->bs412_gate = strtof(value, NULL);
else if(MATCH("fm95", "bs412_knee")) pconfig->bs412_knee = strtof(value, NULL);
else if(MATCH("advanced", "lpf_order")) pconfig->lpf_order = atoi(value);
else if(MATCH("advanced", "stereo_ssb")) pconfig->stereo_ssb = atoi(value);
else if(MATCH("advanced", "preemp_unity")) pconfig->preemp_unity_freq = strtof(value, NULL);
@@ -444,8 +446,8 @@ void init_runtime(FM95_Runtime* runtime, const FM95_Config config) {
}
if(runtime->bs412.init == true && (runtime->bs412.sample_rate == config.sample_rate)) {
reinit_bs412(&runtime->bs412, config.mpx_deviation, config.mpx_power, config.bs412_attack, config.bs412_release, config.bs412_max, config.bs412_gate);
} else init_bs412(&runtime->bs412, config.mpx_deviation, config.mpx_power, config.bs412_attack, config.bs412_release, config.bs412_max, config.bs412_gate, config.sample_rate);
reinit_bs412(&runtime->bs412, config.mpx_deviation, config.mpx_power, config.bs412_attack, config.bs412_release, config.bs412_max, config.bs412_gate, config.bs412_knee);
} else init_bs412(&runtime->bs412, config.mpx_deviation, config.mpx_power, config.bs412_attack, config.bs412_release, config.bs412_max, config.bs412_gate, config.bs412_knee, config.sample_rate);
init_stereo_encoder(&runtime->stencode, config.stereo_ssb, 4.0f, &runtime->osc, config.volumes.audio, config.volumes.pilot);
float last_gain = 0.0f;
@@ -560,6 +562,16 @@ static void *handle_client(ipc_client_arg_t *arg) {
to_run = 0;
to_reload = 1;
break;
case 110:
// Set BS412 gate
memcpy(&val, buf + 1, sizeof(float));
data->runtime->bs412.knee_db = val;
reply = 0;
break;
case 0xfe:
// Fetch config
send(fd, data->config, sizeof(FM95_Config), 0);
break;
case 0xff:
// Fetch data
send(fd, data->run_result, sizeof(FM95_RunResult), 0);
@@ -617,6 +629,7 @@ int main(int argc, char **argv) {
.bs412_release = 0.025f,
.bs412_max = 2.82f,
.bs412_gate = -20.0f,
.bs412_knee = 4.0f,
.lpf_cutoff = 15000.0f,
};