radio95/fm95
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wow, who made that last commit?

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This commit is contained in:
kuba
2026-05-04 15:50:14 +02:00
parent 467aee92dd
commit 92f5881cdd
2 changed files with 13 additions and 11 deletions
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filter/bs412.c
+1 -1
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@@ -72,7 +72,7 @@ float bs412_compress(BS412Compressor* comp, float audio, float sample_mpx, float
comp->sample_counter++; comp->sample_counter++;
if(mpx_power != NULL) *mpx_power += power_to_dbr(comp->avg_power, comp->reference); if(mpx_power != NULL) *mpx_power = power_to_dbr(comp->avg_power, comp->reference);
if(comp->can_compress) return output_sample; if(comp->can_compress) return output_sample;
return combined; return combined;
src/fm95.c
+12 -10
View File
@@ -95,12 +95,12 @@ typedef struct {
} FM95_SetupContext; } FM95_SetupContext;
typedef struct { typedef struct {
uint32_t sample_counter;
float mpx_power; float mpx_power;
float bs412_gain; float bs412_gain;
float agc_gain; float agc_gain;
float input_level; float input_level;
float audio_level; float audio_level;
float deviation;
} FM95_RunResult; } FM95_RunResult;
static inline bool compare_dvs(const FM95_DeviceNames *a, const FM95_DeviceNames *b) { static inline bool compare_dvs(const FM95_DeviceNames *a, const FM95_DeviceNames *b) {
@@ -205,8 +205,9 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime, FM95_RunResult* re
} }
} }
uint16_t i; for(uint16_t i = 0; i < BUFFER_SIZE; i++) {
for(i = 0; i < BUFFER_SIZE; i++) { bool do_result = (i == BUFFER_SIZE - 1);
float mpx = 0.0f; float mpx = 0.0f;
float audio = 0.0f; float audio = 0.0f;
@@ -214,13 +215,13 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime, FM95_RunResult* re
float r = audio_stereo_input[2*i+1]*config.audio_preamp; float r = audio_stereo_input[2*i+1]*config.audio_preamp;
float mono = 0.5f * (fabsf(l) + fabsf(r)); float mono = 0.5f * (fabsf(l) + fabsf(r));
temp_result.input_level += mono; temp_result.input_level = mono;
if(config.agc_max != 0.0) { if(config.agc_max != 0.0) {
float agc_gain = process_agc(&runtime->agc, mono); float agc_gain = process_agc(&runtime->agc, mono);
l *= agc_gain; l *= agc_gain;
r *= agc_gain; r *= agc_gain;
temp_result.agc_gain += agc_gain; temp_result.agc_gain = agc_gain;
} }
float mod_l, mod_r; float mod_l, mod_r;
@@ -238,7 +239,7 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime, FM95_RunResult* re
mod_l = tanhf(mod_l * config.volumes.drive) * softclip_norm; mod_l = tanhf(mod_l * config.volumes.drive) * softclip_norm;
mod_r = tanhf(mod_r * config.volumes.drive) * softclip_norm; mod_r = tanhf(mod_r * config.volumes.drive) * softclip_norm;
temp_result.audio_level += (mod_l + mod_r) * 0.5f; if(do_result) temp_result.audio_level = (mod_l + mod_r) * 0.5f;
mpx = stereo_encode(&runtime->stencode, config.stereo, mod_l, mod_r, &audio); mpx = stereo_encode(&runtime->stencode, config.stereo, mod_l, mod_r, &audio);
@@ -257,12 +258,13 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime, FM95_RunResult* re
} }
mpx = bs412_compress(&runtime->bs412, audio, mpx+mpx_in[i], &temp_result.mpx_power); mpx = bs412_compress(&runtime->bs412, audio, mpx+mpx_in[i], &temp_result.mpx_power);
temp_result.bs412_gain += runtime->bs412.gain; temp_result.bs412_gain = runtime->bs412.gain;
mpx = tanhf(mpx);
output[i] = tanhf(mpx)*config.master_volume; // Ensure peak deviation of 75 khz (or the set deviation), assuming we're calibrated correctly if(do_result) temp_result.deviation = mpx * config.mpx_deviation;
output[i] = mpx*config.master_volume; // Ensure peak deviation of 75 khz (or the set deviation), assuming we're calibrated correctly
advance_oscillator(&runtime->osc); advance_oscillator(&runtime->osc);
} temp_result.sample_counter = i; } memcpy(result, &temp_result, sizeof(FM95_RunResult));
memcpy(result, &temp_result, sizeof(FM95_RunResult));
_pulse_output; _pulse_output;
} }