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avfilter/af_astats: add support for selecting measured statistics

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set_metadata with many entries is not very efficient, and with small audio
frames the performance loss is noticable. Also with this very simple
calculations (like peak) can be even further optimized.

Unfoturnately there are some small differences in metadata and av_log info
output, so factorizing calculations and output might not worth the hassle.

Signed-off-by: Marton Balint <cus@passwd.hu>
pull/310/head
Marton Balint 6 years ago
parent 978880c803
commit e85f37d51e
2 changed files with 129 additions and 0 deletions
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  1. 11
      doc/filters.texi
  2. 118
      libavfilter/af_astats.c

11
doc/filters.texi
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@ -2156,6 +2156,17 @@ For description what each key means read below.
@item reset
Set number of frame after which stats are going to be recalculated.
Default is disabled.
@item measure_perchannel
Select the entries which need to be measured per channel. The metadata keys can
be used as flags, default is @option{all} which measures everything.
@option{none} disables all per channel measurement.
@item measure_overall
Select the entries which need to be measured overall. The metadata keys can
be used as flags, default is @option{all} which measures everything.
@option{none} disables all overall measurement.
@end table
A description of each shown parameter follows:

118
libavfilter/af_astats.c
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@ -26,6 +26,29 @@
#include "avfilter.h"
#include "internal.h"
#define MEASURE_ALL UINT_MAX
#define MEASURE_NONE 0
#define MEASURE_DC_OFFSET (1 << 0)
#define MEASURE_MIN_LEVEL (1 << 1)
#define MEASURE_MAX_LEVEL (1 << 2)
#define MEASURE_MIN_DIFFERENCE (1 << 3)
#define MEASURE_MAX_DIFFERENCE (1 << 4)
#define MEASURE_MEAN_DIFFERENCE (1 << 5)
#define MEASURE_RMS_DIFFERENCE (1 << 6)
#define MEASURE_PEAK_LEVEL (1 << 7)
#define MEASURE_RMS_LEVEL (1 << 8)
#define MEASURE_RMS_PEAK (1 << 9)
#define MEASURE_RMS_TROUGH (1 << 10)
#define MEASURE_CREST_FACTOR (1 << 11)
#define MEASURE_FLAT_FACTOR (1 << 12)
#define MEASURE_PEAK_COUNT (1 << 13)
#define MEASURE_BIT_DEPTH (1 << 14)
#define MEASURE_DYNAMIC_RANGE (1 << 15)
#define MEASURE_ZERO_CROSSINGS (1 << 16)
#define MEASURE_ZERO_CROSSINGS_RATE (1 << 17)
#define MEASURE_NUMBER_OF_SAMPLES (1 << 18)
typedef struct ChannelStats {
double last;
double last_non_zero;
@ -56,6 +79,8 @@ typedef struct AudioStatsContext {
int reset_count;
int nb_frames;
int maxbitdepth;
int measure_perchannel;
int measure_overall;
} AudioStatsContext;
#define OFFSET(x) offsetof(AudioStatsContext, x)
@ -65,6 +90,29 @@ static const AVOption astats_options[] = {
{ "length", "set the window length", OFFSET(time_constant), AV_OPT_TYPE_DOUBLE, {.dbl=.05}, .01, 10, FLAGS },
{ "metadata", "inject metadata in the filtergraph", OFFSET(metadata), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "reset", "recalculate stats after this many frames", OFFSET(reset_count), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
{ "measure_perchannel", "only measure_perchannel these per-channel statistics", OFFSET(measure_perchannel), AV_OPT_TYPE_FLAGS, {.i64=MEASURE_ALL}, 0, UINT_MAX, FLAGS, "measure" },
{ "none" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NONE }, 0, 0, FLAGS, "measure" },
{ "all" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ALL }, 0, 0, FLAGS, "measure" },
{ "DC_offset" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_DC_OFFSET }, 0, 0, FLAGS, "measure" },
{ "Min_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MIN_LEVEL }, 0, 0, FLAGS, "measure" },
{ "Max_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MAX_LEVEL }, 0, 0, FLAGS, "measure" },
{ "Min_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MIN_DIFFERENCE }, 0, 0, FLAGS, "measure" },
{ "Max_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MAX_DIFFERENCE }, 0, 0, FLAGS, "measure" },
{ "Mean_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MEAN_DIFFERENCE }, 0, 0, FLAGS, "measure" },
{ "RMS_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_DIFFERENCE }, 0, 0, FLAGS, "measure" },
{ "Peak_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_PEAK_LEVEL }, 0, 0, FLAGS, "measure" },
{ "RMS_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_LEVEL }, 0, 0, FLAGS, "measure" },
{ "RMS_peak" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_PEAK }, 0, 0, FLAGS, "measure" },
{ "RMS_trough" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_TROUGH }, 0, 0, FLAGS, "measure" },
{ "Crest_factor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_CREST_FACTOR }, 0, 0, FLAGS, "measure" },
{ "Flat_factor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_FLAT_FACTOR }, 0, 0, FLAGS, "measure" },
{ "Peak_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_PEAK_COUNT }, 0, 0, FLAGS, "measure" },
{ "Bit_depth" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_BIT_DEPTH }, 0, 0, FLAGS, "measure" },
{ "Dynamic_range" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_DYNAMIC_RANGE }, 0, 0, FLAGS, "measure" },
{ "Zero_crossings" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS }, 0, 0, FLAGS, "measure" },
{ "Zero_crossings_rate" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS_RATE }, 0, 0, FLAGS, "measure" },
{ "Number_of_samples" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_SAMPLES }, 0, 0, FLAGS, "measure" },
{ "measure_overall", "only measure_perchannel these overall statistics", OFFSET(measure_overall), AV_OPT_TYPE_FLAGS, {.i64=MEASURE_ALL}, 0, UINT_MAX, FLAGS, "measure" },
{ NULL }
};
@ -282,44 +330,79 @@ static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
if (fabs(p->sigma_x) > fabs(max_sigma_x))
max_sigma_x = p->sigma_x;
if (s->measure_perchannel & MEASURE_DC_OFFSET)
set_meta(metadata, c + 1, "DC_offset", "%f", p->sigma_x / p->nb_samples);
if (s->measure_perchannel & MEASURE_MIN_LEVEL)
set_meta(metadata, c + 1, "Min_level", "%f", p->min);
if (s->measure_perchannel & MEASURE_MAX_LEVEL)
set_meta(metadata, c + 1, "Max_level", "%f", p->max);
if (s->measure_perchannel & MEASURE_MIN_DIFFERENCE)
set_meta(metadata, c + 1, "Min_difference", "%f", p->min_diff);
if (s->measure_perchannel & MEASURE_MAX_DIFFERENCE)
set_meta(metadata, c + 1, "Max_difference", "%f", p->max_diff);
if (s->measure_perchannel & MEASURE_MEAN_DIFFERENCE)
set_meta(metadata, c + 1, "Mean_difference", "%f", p->diff1_sum / (p->nb_samples - 1));
if (s->measure_perchannel & MEASURE_RMS_DIFFERENCE)
set_meta(metadata, c + 1, "RMS_difference", "%f", sqrt(p->diff1_sum_x2 / (p->nb_samples - 1)));
if (s->measure_perchannel & MEASURE_PEAK_LEVEL)
set_meta(metadata, c + 1, "Peak_level", "%f", LINEAR_TO_DB(FFMAX(-p->nmin, p->nmax)));
if (s->measure_perchannel & MEASURE_RMS_LEVEL)
set_meta(metadata, c + 1, "RMS_level", "%f", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
if (s->measure_perchannel & MEASURE_RMS_PEAK)
set_meta(metadata, c + 1, "RMS_peak", "%f", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
if (s->measure_perchannel & MEASURE_RMS_TROUGH)
set_meta(metadata, c + 1, "RMS_trough", "%f", LINEAR_TO_DB(sqrt(p->min_sigma_x2)));
if (s->measure_perchannel & MEASURE_CREST_FACTOR)
set_meta(metadata, c + 1, "Crest_factor", "%f", p->sigma_x2 ? FFMAX(-p->min, p->max) / sqrt(p->sigma_x2 / p->nb_samples) : 1);
if (s->measure_perchannel & MEASURE_FLAT_FACTOR)
set_meta(metadata, c + 1, "Flat_factor", "%f", LINEAR_TO_DB((p->min_runs + p->max_runs) / (p->min_count + p->max_count)));
if (s->measure_perchannel & MEASURE_PEAK_COUNT)
set_meta(metadata, c + 1, "Peak_count", "%f", (float)(p->min_count + p->max_count));
if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
bit_depth(s, p->mask, p->imask, &depth);
set_meta(metadata, c + 1, "Bit_depth", "%f", depth.num);
set_meta(metadata, c + 1, "Bit_depth2", "%f", depth.den);
}
if (s->measure_perchannel & MEASURE_DYNAMIC_RANGE)
set_meta(metadata, c + 1, "Dynamic_range", "%f", LINEAR_TO_DB(2 * FFMAX(FFABS(p->min), FFABS(p->max))/ p->min_non_zero));
if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS)
set_meta(metadata, c + 1, "Zero_crossings", "%f", p->zero_runs);
if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS_RATE)
set_meta(metadata, c + 1, "Zero_crossings_rate", "%f", p->zero_runs/(double)p->nb_samples);
}
if (s->measure_overall & MEASURE_DC_OFFSET)
set_meta(metadata, 0, "Overall.DC_offset", "%f", max_sigma_x / (nb_samples / s->nb_channels));
if (s->measure_overall & MEASURE_MIN_LEVEL)
set_meta(metadata, 0, "Overall.Min_level", "%f", min);
if (s->measure_overall & MEASURE_MAX_LEVEL)
set_meta(metadata, 0, "Overall.Max_level", "%f", max);
if (s->measure_overall & MEASURE_MIN_DIFFERENCE)
set_meta(metadata, 0, "Overall.Min_difference", "%f", min_diff);
if (s->measure_overall & MEASURE_MAX_DIFFERENCE)
set_meta(metadata, 0, "Overall.Max_difference", "%f", max_diff);
if (s->measure_overall & MEASURE_MEAN_DIFFERENCE)
set_meta(metadata, 0, "Overall.Mean_difference", "%f", diff1_sum / (nb_samples - s->nb_channels));
if (s->measure_overall & MEASURE_RMS_DIFFERENCE)
set_meta(metadata, 0, "Overall.RMS_difference", "%f", sqrt(diff1_sum_x2 / (nb_samples - s->nb_channels)));
if (s->measure_overall & MEASURE_PEAK_LEVEL)
set_meta(metadata, 0, "Overall.Peak_level", "%f", LINEAR_TO_DB(FFMAX(-nmin, nmax)));
if (s->measure_overall & MEASURE_RMS_LEVEL)
set_meta(metadata, 0, "Overall.RMS_level", "%f", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
if (s->measure_overall & MEASURE_RMS_PEAK)
set_meta(metadata, 0, "Overall.RMS_peak", "%f", LINEAR_TO_DB(sqrt(max_sigma_x2)));
if (s->measure_overall & MEASURE_RMS_TROUGH)
set_meta(metadata, 0, "Overall.RMS_trough", "%f", LINEAR_TO_DB(sqrt(min_sigma_x2)));
if (s->measure_overall & MEASURE_FLAT_FACTOR)
set_meta(metadata, 0, "Overall.Flat_factor", "%f", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
if (s->measure_overall & MEASURE_PEAK_COUNT)
set_meta(metadata, 0, "Overall.Peak_count", "%f", (float)(min_count + max_count) / (double)s->nb_channels);
if (s->measure_overall & MEASURE_BIT_DEPTH) {
bit_depth(s, mask, imask, &depth);
set_meta(metadata, 0, "Overall.Bit_depth", "%f", depth.num);
set_meta(metadata, 0, "Overall.Bit_depth2", "%f", depth.den);
}
if (s->measure_overall & MEASURE_NUMBER_OF_SAMPLES)
set_meta(metadata, 0, "Overall.Number_of_samples", "%f", nb_samples / s->nb_channels);
}
@ -478,45 +561,80 @@ static void print_stats(AVFilterContext *ctx)
max_sigma_x = p->sigma_x;
av_log(ctx, AV_LOG_INFO, "Channel: %d\n", c + 1);
if (s->measure_perchannel & MEASURE_DC_OFFSET)
av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", p->sigma_x / p->nb_samples);
if (s->measure_perchannel & MEASURE_MIN_LEVEL)
av_log(ctx, AV_LOG_INFO, "Min level: %f\n", p->min);
if (s->measure_perchannel & MEASURE_MAX_LEVEL)
av_log(ctx, AV_LOG_INFO, "Max level: %f\n", p->max);
if (s->measure_perchannel & MEASURE_MIN_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", p->min_diff);
if (s->measure_perchannel & MEASURE_MAX_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", p->max_diff);
if (s->measure_perchannel & MEASURE_MEAN_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", p->diff1_sum / (p->nb_samples - 1));
if (s->measure_perchannel & MEASURE_RMS_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "RMS difference: %f\n", sqrt(p->diff1_sum_x2 / (p->nb_samples - 1)));
if (s->measure_perchannel & MEASURE_PEAK_LEVEL)
av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-p->nmin, p->nmax)));
if (s->measure_perchannel & MEASURE_RMS_LEVEL)
av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
if (s->measure_perchannel & MEASURE_RMS_PEAK)
av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
if (s->measure_perchannel & MEASURE_RMS_TROUGH)
if (p->min_sigma_x2 != 1)
av_log(ctx, AV_LOG_INFO, "RMS trough dB: %f\n",LINEAR_TO_DB(sqrt(p->min_sigma_x2)));
if (s->measure_perchannel & MEASURE_CREST_FACTOR)
av_log(ctx, AV_LOG_INFO, "Crest factor: %f\n", p->sigma_x2 ? FFMAX(-p->nmin, p->nmax) / sqrt(p->sigma_x2 / p->nb_samples) : 1);
if (s->measure_perchannel & MEASURE_FLAT_FACTOR)
av_log(ctx, AV_LOG_INFO, "Flat factor: %f\n", LINEAR_TO_DB((p->min_runs + p->max_runs) / (p->min_count + p->max_count)));
if (s->measure_perchannel & MEASURE_PEAK_COUNT)
av_log(ctx, AV_LOG_INFO, "Peak count: %"PRId64"\n", p->min_count + p->max_count);
if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
bit_depth(s, p->mask, p->imask, &depth);
av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u\n", depth.num, depth.den);
}
if (s->measure_perchannel & MEASURE_DYNAMIC_RANGE)
av_log(ctx, AV_LOG_INFO, "Dynamic range: %f\n", LINEAR_TO_DB(2 * FFMAX(FFABS(p->min), FFABS(p->max))/ p->min_non_zero));
if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS)
av_log(ctx, AV_LOG_INFO, "Zero crossings: %"PRId64"\n", p->zero_runs);
if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS_RATE)
av_log(ctx, AV_LOG_INFO, "Zero crossings rate: %f\n", p->zero_runs/(double)p->nb_samples);
}
av_log(ctx, AV_LOG_INFO, "Overall\n");
if (s->measure_overall & MEASURE_DC_OFFSET)
av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", max_sigma_x / (nb_samples / s->nb_channels));
if (s->measure_overall & MEASURE_MIN_LEVEL)
av_log(ctx, AV_LOG_INFO, "Min level: %f\n", min);
if (s->measure_overall & MEASURE_MAX_LEVEL)
av_log(ctx, AV_LOG_INFO, "Max level: %f\n", max);
if (s->measure_overall & MEASURE_MIN_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", min_diff);
if (s->measure_overall & MEASURE_MAX_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", max_diff);
if (s->measure_overall & MEASURE_MEAN_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", diff1_sum / (nb_samples - s->nb_channels));
if (s->measure_overall & MEASURE_RMS_DIFFERENCE)
av_log(ctx, AV_LOG_INFO, "RMS difference: %f\n", sqrt(diff1_sum_x2 / (nb_samples - s->nb_channels)));
if (s->measure_overall & MEASURE_PEAK_LEVEL)
av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-nmin, nmax)));
if (s->measure_overall & MEASURE_RMS_LEVEL)
av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
if (s->measure_overall & MEASURE_RMS_PEAK)
av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(max_sigma_x2)));
if (s->measure_overall & MEASURE_RMS_TROUGH)
if (min_sigma_x2 != 1)
av_log(ctx, AV_LOG_INFO, "RMS trough dB: %f\n", LINEAR_TO_DB(sqrt(min_sigma_x2)));
if (s->measure_overall & MEASURE_FLAT_FACTOR)
av_log(ctx, AV_LOG_INFO, "Flat factor: %f\n", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
if (s->measure_overall & MEASURE_PEAK_COUNT)
av_log(ctx, AV_LOG_INFO, "Peak count: %f\n", (min_count + max_count) / (double)s->nb_channels);
if (s->measure_overall & MEASURE_BIT_DEPTH) {
bit_depth(s, mask, imask, &depth);
av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u\n", depth.num, depth.den);
}
if (s->measure_overall & MEASURE_NUMBER_OF_SAMPLES)
av_log(ctx, AV_LOG_INFO, "Number of samples: %"PRId64"\n", nb_samples / s->nb_channels);
}

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