double min, max;
double min_run, max_run;
double min_runs, max_runs;
+ double min_diff, max_diff;
+ double diff1_sum;
+ uint64_t mask;
uint64_t min_count, max_count;
uint64_t nb_samples;
} ChannelStats;
uint64_t tc_samples;
double time_constant;
double mult;
+ int metadata;
+ int reset_count;
+ int nb_frames;
} AudioStatsContext;
#define OFFSET(x) offsetof(AudioStatsContext, x)
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_INT, {.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 },
{ NULL }
};
return ff_set_common_samplerates(ctx, formats);
}
+static void reset_stats(AudioStatsContext *s)
+{
+ int c;
+
+ memset(s->chstats, 0, sizeof(*s->chstats));
+
+ for (c = 0; c < s->nb_channels; c++) {
+ ChannelStats *p = &s->chstats[c];
+
+ p->min = p->min_sigma_x2 = DBL_MAX;
+ p->max = p->max_sigma_x2 = DBL_MIN;
+ p->min_diff = p->max_diff = -1;
+ }
+}
+
static int config_output(AVFilterLink *outlink)
{
AudioStatsContext *s = outlink->src->priv;
- int c;
s->chstats = av_calloc(sizeof(*s->chstats), outlink->channels);
if (!s->chstats)
s->mult = exp((-1 / s->time_constant / outlink->sample_rate));
s->tc_samples = 5 * s->time_constant * outlink->sample_rate + .5;
- for (c = 0; c < s->nb_channels; c++) {
- ChannelStats *p = &s->chstats[c];
-
- p->min = p->min_sigma_x2 = DBL_MAX;
- p->max = p->max_sigma_x2 = DBL_MIN;
- }
+ reset_stats(s);
return 0;
}
+static unsigned bit_depth(uint64_t mask)
+{
+ unsigned result = 64;
+
+ for (; result && !(mask & 1); --result, mask >>= 1);
+
+ return result;
+}
+
static inline void update_stat(AudioStatsContext *s, ChannelStats *p, double d)
{
if (d < p->min) {
p->sigma_x += d;
p->sigma_x2 += d * d;
p->avg_sigma_x2 = p->avg_sigma_x2 * s->mult + (1.0 - s->mult) * d * d;
+ p->min_diff = FFMIN(p->min_diff == -1 ? DBL_MAX : p->min_diff, FFABS(d - (p->min_diff == -1 ? DBL_MAX : p->last)));
+ p->max_diff = FFMAX(p->max_diff, FFABS(d - (p->max_diff == -1 ? d : p->last)));
+ p->diff1_sum += FFABS(d - p->last);
p->last = d;
+ p->mask |= llrint(d * (1LLU<<63));
if (p->nb_samples >= s->tc_samples) {
p->max_sigma_x2 = FFMAX(p->max_sigma_x2, p->avg_sigma_x2);
p->nb_samples++;
}
+static void set_meta(AVDictionary **metadata, int chan, const char *key,
+ const char *fmt, double val)
+{
+ uint8_t value[128];
+ uint8_t key2[128];
+
+ snprintf(value, sizeof(value), fmt, val);
+ if (chan)
+ snprintf(key2, sizeof(key2), "lavfi.astats.%d.%s", chan, key);
+ else
+ snprintf(key2, sizeof(key2), "lavfi.astats.%s", key);
+ av_dict_set(metadata, key2, value, 0);
+}
+
+#define LINEAR_TO_DB(x) (log10(x) * 20)
+
+static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
+{
+ uint64_t mask = 0, min_count = 0, max_count = 0, nb_samples = 0;
+ double min_runs = 0, max_runs = 0,
+ min = DBL_MAX, max = DBL_MIN, min_diff = DBL_MAX, max_diff = 0,
+ max_sigma_x = 0,
+ diff1_sum = 0,
+ sigma_x = 0,
+ sigma_x2 = 0,
+ min_sigma_x2 = DBL_MAX,
+ max_sigma_x2 = DBL_MIN;
+ int c;
+
+ for (c = 0; c < s->nb_channels; c++) {
+ ChannelStats *p = &s->chstats[c];
+
+ if (p->nb_samples < s->tc_samples)
+ p->min_sigma_x2 = p->max_sigma_x2 = p->sigma_x2 / p->nb_samples;
+
+ min = FFMIN(min, p->min);
+ max = FFMAX(max, p->max);
+ min_diff = FFMIN(min_diff, p->min_diff);
+ max_diff = FFMAX(max_diff, p->max_diff);
+ diff1_sum += p->diff1_sum,
+ min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
+ max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
+ sigma_x += p->sigma_x;
+ sigma_x2 += p->sigma_x2;
+ min_count += p->min_count;
+ max_count += p->max_count;
+ min_runs += p->min_runs;
+ max_runs += p->max_runs;
+ mask |= p->mask;
+ nb_samples += p->nb_samples;
+ if (fabs(p->sigma_x) > fabs(max_sigma_x))
+ max_sigma_x = p->sigma_x;
+
+ set_meta(metadata, c + 1, "DC_offset", "%f", p->sigma_x / p->nb_samples);
+ set_meta(metadata, c + 1, "Min_level", "%f", p->min);
+ set_meta(metadata, c + 1, "Max_level", "%f", p->max);
+ set_meta(metadata, c + 1, "Min_difference", "%f", p->min_diff);
+ set_meta(metadata, c + 1, "Max_difference", "%f", p->max_diff);
+ set_meta(metadata, c + 1, "Mean_difference", "%f", p->diff1_sum / (p->nb_samples - 1));
+ set_meta(metadata, c + 1, "Peak_level", "%f", LINEAR_TO_DB(FFMAX(-p->min, p->max)));
+ set_meta(metadata, c + 1, "RMS_level", "%f", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
+ set_meta(metadata, c + 1, "RMS_peak", "%f", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
+ set_meta(metadata, c + 1, "RMS_trough", "%f", LINEAR_TO_DB(sqrt(p->min_sigma_x2)));
+ set_meta(metadata, c + 1, "Crest_factor", "%f", p->sigma_x2 ? FFMAX(-p->min, p->max) / sqrt(p->sigma_x2 / p->nb_samples) : 1);
+ set_meta(metadata, c + 1, "Flat_factor", "%f", LINEAR_TO_DB((p->min_runs + p->max_runs) / (p->min_count + p->max_count)));
+ set_meta(metadata, c + 1, "Peak_count", "%f", (float)(p->min_count + p->max_count));
+ set_meta(metadata, c + 1, "Bit_depth", "%f", bit_depth(p->mask));
+ }
+
+ set_meta(metadata, 0, "Overall.DC_offset", "%f", max_sigma_x / (nb_samples / s->nb_channels));
+ set_meta(metadata, 0, "Overall.Min_level", "%f", min);
+ set_meta(metadata, 0, "Overall.Max_level", "%f", max);
+ set_meta(metadata, 0, "Overall.Min_difference", "%f", min_diff);
+ set_meta(metadata, 0, "Overall.Max_difference", "%f", max_diff);
+ set_meta(metadata, 0, "Overall.Mean_difference", "%f", diff1_sum / (nb_samples - s->nb_channels));
+ set_meta(metadata, 0, "Overall.Peak_level", "%f", LINEAR_TO_DB(FFMAX(-min, max)));
+ set_meta(metadata, 0, "Overall.RMS_level", "%f", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
+ set_meta(metadata, 0, "Overall.RMS_peak", "%f", LINEAR_TO_DB(sqrt(max_sigma_x2)));
+ set_meta(metadata, 0, "Overall.RMS_trough", "%f", LINEAR_TO_DB(sqrt(min_sigma_x2)));
+ set_meta(metadata, 0, "Overall.Flat_factor", "%f", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
+ set_meta(metadata, 0, "Overall.Peak_count", "%f", (float)(min_count + max_count) / (double)s->nb_channels);
+ set_meta(metadata, 0, "Overall.Bit_depth", "%f", bit_depth(mask));
+ set_meta(metadata, 0, "Overall.Number_of_samples", "%f", nb_samples / s->nb_channels);
+}
+
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
AudioStatsContext *s = inlink->dst->priv;
+ AVDictionary **metadata = avpriv_frame_get_metadatap(buf);
const int channels = s->nb_channels;
const double *src;
int i, c;
break;
}
+ if (s->metadata)
+ set_metadata(s, metadata);
+
+ if (s->reset_count > 0) {
+ s->nb_frames++;
+ if (s->nb_frames >= s->reset_count) {
+ reset_stats(s);
+ s->nb_frames = 0;
+ }
+ }
+
return ff_filter_frame(inlink->dst->outputs[0], buf);
}
-#define LINEAR_TO_DB(x) (log10(x) * 20)
-
static void print_stats(AVFilterContext *ctx)
{
AudioStatsContext *s = ctx->priv;
- uint64_t min_count = 0, max_count = 0, nb_samples = 0;
+ uint64_t mask = 0, min_count = 0, max_count = 0, nb_samples = 0;
double min_runs = 0, max_runs = 0,
- min = DBL_MAX, max = DBL_MIN,
+ min = DBL_MAX, max = DBL_MIN, min_diff = DBL_MAX, max_diff = 0,
max_sigma_x = 0,
+ diff1_sum = 0,
sigma_x = 0,
sigma_x2 = 0,
min_sigma_x2 = DBL_MAX,
min = FFMIN(min, p->min);
max = FFMAX(max, p->max);
+ min_diff = FFMIN(min_diff, p->min_diff);
+ max_diff = FFMAX(max_diff, p->max_diff);
+ diff1_sum += p->diff1_sum,
min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
sigma_x += p->sigma_x;
max_count += p->max_count;
min_runs += p->min_runs;
max_runs += p->max_runs;
+ mask |= p->mask;
nb_samples += p->nb_samples;
if (fabs(p->sigma_x) > fabs(max_sigma_x))
max_sigma_x = p->sigma_x;
av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", p->sigma_x / p->nb_samples);
av_log(ctx, AV_LOG_INFO, "Min level: %f\n", p->min);
av_log(ctx, AV_LOG_INFO, "Max level: %f\n", p->max);
+ av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", p->min_diff);
+ av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", p->max_diff);
+ av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", p->diff1_sum / (p->nb_samples - 1));
av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-p->min, p->max)));
av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
av_log(ctx, AV_LOG_INFO, "Crest factor: %f\n", p->sigma_x2 ? FFMAX(-p->min, p->max) / sqrt(p->sigma_x2 / p->nb_samples) : 1);
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)));
av_log(ctx, AV_LOG_INFO, "Peak count: %"PRId64"\n", p->min_count + p->max_count);
+ av_log(ctx, AV_LOG_INFO, "Bit depth: %u\n", bit_depth(p->mask));
}
av_log(ctx, AV_LOG_INFO, "Overall\n");
av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", max_sigma_x / (nb_samples / s->nb_channels));
av_log(ctx, AV_LOG_INFO, "Min level: %f\n", min);
av_log(ctx, AV_LOG_INFO, "Max level: %f\n", max);
+ av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", min_diff);
+ av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", max_diff);
+ av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", diff1_sum / (nb_samples - s->nb_channels));
av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-min, max)));
av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(max_sigma_x2)));
av_log(ctx, AV_LOG_INFO, "RMS trough dB: %f\n", LINEAR_TO_DB(sqrt(min_sigma_x2)));
av_log(ctx, AV_LOG_INFO, "Flat factor: %f\n", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
av_log(ctx, AV_LOG_INFO, "Peak count: %f\n", (min_count + max_count) / (double)s->nb_channels);
+ av_log(ctx, AV_LOG_INFO, "Bit depth: %u\n", bit_depth(mask));
av_log(ctx, AV_LOG_INFO, "Number of samples: %"PRId64"\n", nb_samples / s->nb_channels);
}
projects / ffmpeg / blobdiff