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avfilter/af_adynamicequalizer: simplify calculations

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This commit is contained in:
Paul B Mahol 2023-07-06 16:47:02 +02:00
parent e52676e20b
commit 889c2529cc
2 changed files with 11 additions and 7 deletions
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16
libavfilter/adynamicequalizer_template.c
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@ -26,6 +26,7 @@
#undef FMIN
#undef CLIP
#undef SAMPLE_FORMAT
#undef EPSILON
#undef FABS
#if DEPTH == 32
#define SAMPLE_FORMAT float
@ -39,6 +40,7 @@
#define CLIP av_clipf
#define FABS fabsf
#define ftype float
#define EPSILON (1.f / (1 << 22))
#else
#define SAMPLE_FORMAT double
#define SQRT sqrt
@ -51,6 +53,7 @@
#define CLIP av_clipd
#define FABS fabs
#define ftype double
#define EPSILON (1.0 / (1LL << 51))
#endif
#define fn3(a,b) a##_##b
@ -147,9 +150,7 @@ static int fn(filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int n
const ftype range = s->range;
const ftype tfrequency = FMIN(s->tfrequency, sample_rate * 0.5);
const ftype release = s->release_coef;
const ftype irelease = ONE - release;
const ftype attack = s->attack_coef;
const ftype iattack = ONE - attack;
const ftype tqfactor = s->tqfactor;
const ftype itqfactor = ONE / tqfactor;
const ftype fg = TAN(M_PI * tfrequency / sample_rate);
@ -198,10 +199,13 @@ static int fn(filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int n
detect = ONE;
}
if ((direction == 0 && detect > state[4]) || (direction == 1 && detect < state[4])) {
detect = iattack * detect + attack * state[4];
} else {
detect = irelease * detect + release * state[4];
{
ftype delta = detect - state[4];
if (delta > EPSILON)
detect = state[4] + attack * delta;
else if (delta < -EPSILON)
detect = state[4] + release * delta;
}
}

2
libavfilter/af_adynamicequalizer.c
View file

@ -76,7 +76,7 @@ static int query_formats(AVFilterContext *ctx)
static double get_coef(double x, double sr)
{
return exp(-1000. / (x * sr));
return 1.0 - exp(-1000. / (x * sr));
}
typedef struct ThreadData {