From 48a30c89af548e4ec4f0a48407dc9e3ab4d30cfa Mon Sep 17 00:00:00 2001 From: KubaPro010 Date: Wed, 31 Dec 2025 10:52:19 +0100 Subject: [PATCH] remove limiter --- filter/bs412.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) diff --git a/filter/bs412.c b/filter/bs412.c index 55297ed..f42bb71 100644 --- a/filter/bs412.c +++ b/filter/bs412.c @@ -1,8 +1,8 @@ #include "bs412.h" -inline float dbr_to_deviation(float dbr) { - return 19000.0f * sqrtf(pow(10.0, dbr / 10.0)); -} +// inline float dbr_to_deviation(float dbr) { +// return 19000.0f * sqrtf(pow(10.0, dbr / 10.0)); +// } inline float deviation_to_dbr(float deviation) { if (deviation < 1e-6f) return -100.0f; @@ -26,15 +26,6 @@ void init_bs412(BS412Compressor* mpx, uint32_t mpx_deviation, float target_power #endif } -static inline float soft_clip_tanh(float sample, float threshold) { - if (fabsf(sample) <= threshold) { - return sample; // Linear region - } - float sign = (sample >= 0) ? 1.0f : -1.0f; - float excess = fabsf(sample) - threshold; - return sign * (threshold + tanhf(excess) * (1.0f - threshold)); -} - float bs412_compress(BS412Compressor* mpx, float sample) { mpx->avg_power += mpx->alpha * ((sample * sample * mpx->mpx_deviation * mpx->mpx_deviation) - mpx->avg_power); @@ -83,9 +74,6 @@ float bs412_compress(BS412Compressor* mpx, float sample) { mpx->gain = fmaxf(0.0f, fminf(mpx->max, mpx->gain)); float output_sample = sample * mpx->gain; - float limit_threshold = dbr_to_deviation(mpx->target + 0.1f) / mpx->mpx_deviation; - output_sample = soft_clip_tanh(output_sample, limit_threshold); - if(deviation_to_dbr(avg_deviation * mpx->gain) > mpx->target && deviation_to_dbr(avg_deviation) < mpx->target) { // Gain is too much, reduce float overshoot_dbr = deviation_to_dbr(avg_deviation * mpx->gain) - mpx->target;