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Code Issues Activity

get rid of the lookahead

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This commit is contained in:
KubaPro010
2025-07-15 21:06:40 +02:00
parent f7cd9d47e1
commit 3d338bda38
2 changed files with 1 additions and 10 deletions
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6
filter/bs412.c
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@@ -29,11 +29,7 @@ void init_bs412(BS412Compressor* mpx, float mpx_deviation, float target_power, f
} }
float bs412_compress(BS412Compressor* mpx, float sample) { float bs412_compress(BS412Compressor* mpx, float sample) {
if(mpx->lookahead_counter >= BS412_LOOKAHEAD) mpx->lookahead_counter = 0; mpx->average += sample * sample * mpx->mpx_deviation * mpx->mpx_deviation;
float process_sample = mpx->lookahead_samples[mpx->lookahead_counter];
mpx->lookahead_samples[mpx->lookahead_counter++] = sample;
mpx->average += process_sample * process_sample * mpx->mpx_deviation * mpx->mpx_deviation;
mpx->average_counter++; mpx->average_counter++;
float avg_power = mpx->average / mpx->average_counter; float avg_power = mpx->average / mpx->average_counter;

5
filter/bs412.h
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@@ -10,8 +10,6 @@
#include "../lib/debug.h" #include "../lib/debug.h"
#endif #endif
#define BS412_LOOKAHEAD 2048 // samples
typedef struct typedef struct
{ {
int mpx_deviation; int mpx_deviation;
@@ -23,9 +21,6 @@ typedef struct
float max; float max;
float gain; float gain;
double average; double average;
float lookahead_samples[BS412_LOOKAHEAD + 1];
int lookahead_counter;
} BS412Compressor; } BS412Compressor;
float dbr_to_deviation(float dbr); float dbr_to_deviation(float dbr);