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avfilter/af_drmeter: refactor number of bins out

This commit is contained in:
Paul B Mahol 2021-11-18 21:33:46 +01:00
parent 9b15f43cf8
commit 2f472d5d65
1 changed files with 13 additions and 11 deletions
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24
libavfilter/af_drmeter.c
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@ -26,13 +26,15 @@
#include "avfilter.h"
#include "internal.h"
#define BINS 10000
typedef struct ChannelStats {
uint64_t nb_samples;
uint64_t blknum;
float peak;
float sum;
uint32_t peaks[10001];
uint32_t rms[10001];
uint32_t peaks[BINS+1];
uint32_t rms[BINS+1];
} ChannelStats;
typedef struct DRMeterContext {
@ -73,8 +75,8 @@ static void finish_block(ChannelStats *p)
rms = sqrt(2 * p->sum / p->nb_samples);
peak = p->peak;
rms_bin = av_clip(rms * 10000, 0, 10000);
peak_bin = av_clip(peak * 10000, 0, 10000);
rms_bin = av_clip(rms * BINS, 0, BINS);
peak_bin = av_clip(peak * BINS, 0, BINS);
p->rms[rms_bin]++;
p->peaks[peak_bin]++;
@ -144,29 +146,29 @@ static void print_stats(AVFilterContext *ctx)
finish_block(p);
for (i = 0; i <= 10000; i++) {
if (p->peaks[10000 - i]) {
for (i = 0; i <= BINS; i++) {
if (p->peaks[BINS - i]) {
if (first)
break;
first = 1;
}
}
secondpeak = (10000 - i) / 10000.;
secondpeak = (BINS - i) / (double)BINS;
for (i = 10000, j = 0; i >= 0 && j < 0.2 * p->blknum; i--) {
for (i = BINS, j = 0; i >= 0 && j < 0.2 * p->blknum; i--) {
if (p->rms[i]) {
rmssum += SQR(i / 10000.) * p->rms[i];
rmssum += SQR(i / (double)BINS) * p->rms[i];
j += p->rms[i];
}
}
chdr = 20 * log10(secondpeak / sqrt(rmssum / (0.2 * p->blknum)));
dr += chdr;
av_log(ctx, AV_LOG_INFO, "Channel %d: DR: %.1f\n", ch + 1, chdr);
av_log(ctx, AV_LOG_INFO, "Channel %d: DR: %g\n", ch + 1, chdr);
}
av_log(ctx, AV_LOG_INFO, "Overall DR: %.1f\n", dr / s->nb_channels);
av_log(ctx, AV_LOG_INFO, "Overall DR: %g\n", dr / s->nb_channels);
}
static av_cold void uninit(AVFilterContext *ctx)