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avfilter/af_astats: add noise floor count stat
This commit is contained in:
Paul B Mahol
parent
715da29501
commit
24db9372eb
@ -2330,6 +2330,7 @@ Crest_factor
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Flat_factor
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Peak_count
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Noise_floor
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Noise_floor_count
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Bit_depth
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Dynamic_range
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Zero_crossings
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@ -2353,6 +2354,7 @@ RMS_trough
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Flat_factor
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Peak_count
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Noise_floor
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Noise_floor_count
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Bit_depth
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Number_of_samples
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Number_of_NaNs
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@ -2427,6 +2429,10 @@ Number of occasions (not the number of samples) that the signal attained either
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@item Noise floor dB
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Minimum local peak measured in dBFS over a short window.
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@item Noise floor count
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Number of occasions (not the number of samples) that the signal attained
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@var{Noise floor}.
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@item Bit depth
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Overall bit depth of audio. Number of bits used for each sample.
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@ -56,6 +56,7 @@
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#define MEASURE_NUMBER_OF_INFS (1 << 20)
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#define MEASURE_NUMBER_OF_DENORMALS (1 << 21)
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#define MEASURE_NOISE_FLOOR (1 << 22)
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#define MEASURE_NOISE_FLOOR_COUNT (1 << 23)
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#define MEASURE_MINMAXPEAK (MEASURE_MIN_LEVEL | MEASURE_MAX_LEVEL | MEASURE_PEAK_LEVEL)
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@ -74,6 +75,7 @@ typedef struct ChannelStats {
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double diff1_sum_x2;
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uint64_t mask, imask;
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uint64_t min_count, max_count;
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uint64_t noise_floor_count;
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uint64_t zero_runs;
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uint64_t nb_samples;
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uint64_t nb_nans;
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@ -132,6 +134,7 @@ static const AVOption astats_options[] = {
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{ "Zero_crossings" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS }, 0, 0, FLAGS, "measure" },
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{ "Zero_crossings_rate" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS_RATE }, 0, 0, FLAGS, "measure" },
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{ "Noise_floor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NOISE_FLOOR }, 0, 0, FLAGS, "measure" },
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{ "Noise_floor_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NOISE_FLOOR_COUNT }, 0, 0, FLAGS, "measure" },
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{ "Number_of_samples" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_SAMPLES }, 0, 0, FLAGS, "measure" },
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{ "Number_of_NaNs" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_NANS }, 0, 0, FLAGS, "measure" },
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{ "Number_of_Infs" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_INFS }, 0, 0, FLAGS, "measure" },
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@ -208,6 +211,7 @@ static void reset_stats(AudioStatsContext *s)
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p->nb_denormals = 0;
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p->last = NAN;
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p->noise_floor = NAN;
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p->noise_floor_count = 0;
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p->win_pos = 0;
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memset(p->win_samples, 0, s->tc_samples * sizeof(*p->win_samples));
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memset(p->histogram, 0, sizeof(p->histogram));
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@ -346,8 +350,14 @@ static inline void update_stat(AudioStatsContext *s, ChannelStats *p, double d,
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if (isnan(p->noise_floor)) {
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p->noise_floor = noise_floor;
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p->noise_floor_count = 1;
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} else {
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p->noise_floor = FFMIN(noise_floor, p->noise_floor);
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if (noise_floor < p->noise_floor) {
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p->noise_floor = noise_floor;
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p->noise_floor_count = 1;
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} else if (noise_floor == p->noise_floor) {
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p->noise_floor_count++;
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}
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}
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}
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@ -398,7 +408,7 @@ static void set_meta(AVDictionary **metadata, int chan, const char *key,
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static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
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{
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uint64_t mask = 0, imask = 0xFFFFFFFFFFFFFFFF, min_count = 0, max_count = 0, nb_samples = 0;
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uint64_t mask = 0, imask = 0xFFFFFFFFFFFFFFFF, min_count = 0, max_count = 0, nb_samples = 0, noise_floor_count = 0;
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uint64_t nb_nans = 0, nb_infs = 0, nb_denormals = 0;
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double min_runs = 0, max_runs = 0,
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min = DBL_MAX, max =-DBL_MAX, min_diff = DBL_MAX, max_diff = 0,
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@ -433,6 +443,7 @@ static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
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sigma_x += p->sigma_x;
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sigma_x2 += p->sigma_x2;
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noise_floor = FFMAX(noise_floor, p->noise_floor);
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noise_floor_count += p->noise_floor_count;
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min_count += p->min_count;
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max_count += p->max_count;
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min_runs += p->min_runs;
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@ -475,7 +486,9 @@ static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
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if (s->measure_perchannel & MEASURE_PEAK_COUNT)
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set_meta(metadata, c + 1, "Peak_count", "%f", (float)(p->min_count + p->max_count));
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if (s->measure_perchannel & MEASURE_NOISE_FLOOR)
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set_meta(metadata, c + 1, "Noise_floor"," %f", LINEAR_TO_DB(p->noise_floor));
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set_meta(metadata, c + 1, "Noise_floor", "%f", LINEAR_TO_DB(p->noise_floor));
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if (s->measure_perchannel & MEASURE_NOISE_FLOOR_COUNT)
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set_meta(metadata, c + 1, "Noise_floor_count", "%f", p->noise_floor_count);
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if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
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bit_depth(s, p->mask, p->imask, &depth);
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set_meta(metadata, c + 1, "Bit_depth", "%f", depth.num);
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@ -523,6 +536,8 @@ static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
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set_meta(metadata, 0, "Overall.Peak_count", "%f", (float)(min_count + max_count) / (double)s->nb_channels);
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if (s->measure_overall & MEASURE_NOISE_FLOOR)
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set_meta(metadata, 0, "Overall.Noise_floor", "%f", LINEAR_TO_DB(noise_floor));
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if (s->measure_overall & MEASURE_NOISE_FLOOR_COUNT)
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set_meta(metadata, 0, "Overall.Noise_floor_count", "%f", noise_floor_count / (double)s->nb_channels);
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if (s->measure_overall & MEASURE_BIT_DEPTH) {
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bit_depth(s, mask, imask, &depth);
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set_meta(metadata, 0, "Overall.Bit_depth", "%f", depth.num);
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@ -641,7 +656,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
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static void print_stats(AVFilterContext *ctx)
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{
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AudioStatsContext *s = ctx->priv;
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uint64_t mask = 0, imask = 0xFFFFFFFFFFFFFFFF, min_count = 0, max_count = 0, nb_samples = 0;
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uint64_t mask = 0, imask = 0xFFFFFFFFFFFFFFFF, min_count = 0, max_count = 0, nb_samples = 0, noise_floor_count = 0;
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uint64_t nb_nans = 0, nb_infs = 0, nb_denormals = 0;
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double min_runs = 0, max_runs = 0,
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min = DBL_MAX, max =-DBL_MAX, min_diff = DBL_MAX, max_diff = 0,
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@ -678,6 +693,7 @@ static void print_stats(AVFilterContext *ctx)
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noise_floor = FFMAX(noise_floor, p->noise_floor);
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min_count += p->min_count;
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max_count += p->max_count;
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noise_floor_count += p->noise_floor_count;
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min_runs += p->min_runs;
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max_runs += p->max_runs;
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mask |= p->mask;
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@ -721,6 +737,8 @@ static void print_stats(AVFilterContext *ctx)
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av_log(ctx, AV_LOG_INFO, "Peak count: %"PRId64"\n", p->min_count + p->max_count);
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if (s->measure_perchannel & MEASURE_NOISE_FLOOR)
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av_log(ctx, AV_LOG_INFO, "Noise floor dB: %f\n", LINEAR_TO_DB(p->noise_floor));
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if (s->measure_perchannel & MEASURE_NOISE_FLOOR_COUNT)
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av_log(ctx, AV_LOG_INFO, "Noise floor count: %"PRId64"\n", p->noise_floor_count);
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if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
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bit_depth(s, p->mask, p->imask, &depth);
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av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u\n", depth.num, depth.den);
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@ -769,6 +787,8 @@ static void print_stats(AVFilterContext *ctx)
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av_log(ctx, AV_LOG_INFO, "Peak count: %f\n", (min_count + max_count) / (double)s->nb_channels);
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if (s->measure_overall & MEASURE_NOISE_FLOOR)
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av_log(ctx, AV_LOG_INFO, "Noise floor dB: %f\n", LINEAR_TO_DB(noise_floor));
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if (s->measure_overall & MEASURE_NOISE_FLOOR_COUNT)
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av_log(ctx, AV_LOG_INFO, "Noise floor count: %f\n", noise_floor_count / (double)s->nb_channels);
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if (s->measure_overall & MEASURE_BIT_DEPTH) {
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bit_depth(s, mask, imask, &depth);
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av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u\n", depth.num, depth.den);
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