FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2009 Rob Sykes <robs@users.sourceforge.net>
3			* Copyright (c) 2013 Paul B Mahol
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include <float.h>
23			#include <math.h>
24
25			#include "libavutil/opt.h"
26			#include "audio.h"
27			#include "avfilter.h"
28			#include "internal.h"
29
30			#define HISTOGRAM_SIZE 8192
31			#define HISTOGRAM_MAX (HISTOGRAM_SIZE-1)
32
33			#define MEASURE_ALL UINT_MAX
34			#define MEASURE_NONE 0
35
36			#define MEASURE_DC_OFFSET (1 << 0)
37			#define MEASURE_MIN_LEVEL (1 << 1)
38			#define MEASURE_MAX_LEVEL (1 << 2)
39			#define MEASURE_MIN_DIFFERENCE (1 << 3)
40			#define MEASURE_MAX_DIFFERENCE (1 << 4)
41			#define MEASURE_MEAN_DIFFERENCE (1 << 5)
42			#define MEASURE_RMS_DIFFERENCE (1 << 6)
43			#define MEASURE_PEAK_LEVEL (1 << 7)
44			#define MEASURE_RMS_LEVEL (1 << 8)
45			#define MEASURE_RMS_PEAK (1 << 9)
46			#define MEASURE_RMS_TROUGH (1 << 10)
47			#define MEASURE_CREST_FACTOR (1 << 11)
48			#define MEASURE_FLAT_FACTOR (1 << 12)
49			#define MEASURE_PEAK_COUNT (1 << 13)
50			#define MEASURE_BIT_DEPTH (1 << 14)
51			#define MEASURE_DYNAMIC_RANGE (1 << 15)
52			#define MEASURE_ZERO_CROSSINGS (1 << 16)
53			#define MEASURE_ZERO_CROSSINGS_RATE (1 << 17)
54			#define MEASURE_NUMBER_OF_SAMPLES (1 << 18)
55			#define MEASURE_NUMBER_OF_NANS (1 << 19)
56			#define MEASURE_NUMBER_OF_INFS (1 << 20)
57			#define MEASURE_NUMBER_OF_DENORMALS (1 << 21)
58			#define MEASURE_NOISE_FLOOR (1 << 22)
59			#define MEASURE_NOISE_FLOOR_COUNT (1 << 23)
60			#define MEASURE_ENTROPY (1 << 24)
61			#define MEASURE_ABS_PEAK_COUNT (1 << 25)
62
63			#define MEASURE_MINMAXPEAK (MEASURE_MIN_LEVEL | MEASURE_MAX_LEVEL | MEASURE_PEAK_LEVEL)
64
65			typedef struct ChannelStats {
66			double last;
67			double last_non_zero;
68			double min_non_zero;
69			double sigma_x, sigma_x2;
70			double avg_sigma_x2, min_sigma_x2, max_sigma_x2;
71			double min, max;
72			double nmin, nmax;
73			double min_run, max_run;
74			double min_runs, max_runs;
75			double min_diff, max_diff;
76			double diff1_sum;
77			double diff1_sum_x2;
78			double abs_peak;
79			uint64_t mask[4];
80			uint64_t min_count, max_count;
81			uint64_t abs_peak_count;
82			uint64_t noise_floor_count;
83			uint64_t zero_runs;
84			uint64_t nb_samples;
85			uint64_t nb_nans;
86			uint64_t nb_infs;
87			uint64_t nb_denormals;
88			double *win_samples;
89			double *sorted_samples;
90			uint64_t ehistogram[HISTOGRAM_SIZE];
91			int64_t lasti;
92			int sorted_front;
93			int sorted_back;
94			int win_pos;
95			int max_index;
96			double noise_floor;
97			double entropy;
98			} ChannelStats;
99
100			typedef struct AudioStatsContext {
101			const AVClass *class;
102			ChannelStats *chstats;
103			int nb_channels;
104			uint64_t tc_samples;
105			double time_constant;
106			double mult;
107			int metadata;
108			int used;
109			int reset_count;
110			int nb_frames;
111			int maxbitdepth;
112			int measure_perchannel;
113			int measure_overall;
114			int is_float;
115			int is_double;
116			} AudioStatsContext;
117
118			#define OFFSET(x) offsetof(AudioStatsContext, x)
119			#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
120
121			static const AVOption astats_options[] = {
122			{ "length", "set the window length", OFFSET(time_constant), AV_OPT_TYPE_DOUBLE, {.dbl=.05}, 0, 10, FLAGS },
123			{ "metadata", "inject metadata in the filtergraph", OFFSET(metadata), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
124			{ "reset", "Set the number of frames over which cumulative stats are calculated before being reset", OFFSET(reset_count), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
125			{ "measure_perchannel", "Select the parameters which are measured per channel", OFFSET(measure_perchannel), AV_OPT_TYPE_FLAGS, {.i64=MEASURE_ALL}, 0, UINT_MAX, FLAGS, "measure" },
126			{ "none" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NONE }, 0, 0, FLAGS, "measure" },
127			{ "all" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ALL }, 0, 0, FLAGS, "measure" },
128			{ "Bit_depth" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_BIT_DEPTH }, 0, 0, FLAGS, "measure" },
129			{ "Crest_factor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_CREST_FACTOR }, 0, 0, FLAGS, "measure" },
130			{ "DC_offset" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_DC_OFFSET }, 0, 0, FLAGS, "measure" },
131			{ "Dynamic_range" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_DYNAMIC_RANGE }, 0, 0, FLAGS, "measure" },
132			{ "Entropy" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ENTROPY }, 0, 0, FLAGS, "measure" },
133			{ "Flat_factor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_FLAT_FACTOR }, 0, 0, FLAGS, "measure" },
134			{ "Max_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MAX_DIFFERENCE }, 0, 0, FLAGS, "measure" },
135			{ "Max_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MAX_LEVEL }, 0, 0, FLAGS, "measure" },
136			{ "Mean_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MEAN_DIFFERENCE }, 0, 0, FLAGS, "measure" },
137			{ "Min_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MIN_DIFFERENCE }, 0, 0, FLAGS, "measure" },
138			{ "Min_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MIN_LEVEL }, 0, 0, FLAGS, "measure" },
139			{ "Noise_floor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NOISE_FLOOR }, 0, 0, FLAGS, "measure" },
140			{ "Noise_floor_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NOISE_FLOOR_COUNT }, 0, 0, FLAGS, "measure" },
141			{ "Number_of_Infs" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_INFS }, 0, 0, FLAGS, "measure" },
142			{ "Number_of_NaNs" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_NANS }, 0, 0, FLAGS, "measure" },
143			{ "Number_of_denormals" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_DENORMALS }, 0, 0, FLAGS, "measure" },
144			{ "Number_of_samples" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_SAMPLES }, 0, 0, FLAGS, "measure" },
145			{ "Peak_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_PEAK_COUNT }, 0, 0, FLAGS, "measure" },
146			{ "Peak_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_PEAK_LEVEL }, 0, 0, FLAGS, "measure" },
147			{ "RMS_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_DIFFERENCE }, 0, 0, FLAGS, "measure" },
148			{ "RMS_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_LEVEL }, 0, 0, FLAGS, "measure" },
149			{ "RMS_peak" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_PEAK }, 0, 0, FLAGS, "measure" },
150			{ "RMS_trough" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_TROUGH }, 0, 0, FLAGS, "measure" },
151			{ "Zero_crossings" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS }, 0, 0, FLAGS, "measure" },
152			{ "Zero_crossings_rate" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS_RATE }, 0, 0, FLAGS, "measure" },
153			{ "Abs_Peak_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ABS_PEAK_COUNT }, 0, 0, FLAGS, "measure" },
154			{ "measure_overall", "Select the parameters which are measured overall", OFFSET(measure_overall), AV_OPT_TYPE_FLAGS, {.i64=MEASURE_ALL}, 0, UINT_MAX, FLAGS, "measure" },
155			{ NULL }
156			};
157
158			AVFILTER_DEFINE_CLASS(astats);
159
160		✗	static void reset_stats(AudioStatsContext *s)
161			{
162			int c;
163
164		✗	for (c = 0; c < s->nb_channels; c++) {
165		✗	ChannelStats *p = &s->chstats[c];
166
167		✗	p->min = p->nmin = p->min_sigma_x2 = DBL_MAX;
168		✗	p->max = p->nmax = p->max_sigma_x2 =-DBL_MAX;
169		✗	p->abs_peak = 0;
170		✗	p->min_non_zero = DBL_MAX;
171		✗	p->min_diff = DBL_MAX;
172		✗	p->max_diff = 0;
173		✗	p->sigma_x = 0;
174		✗	p->sigma_x2 = 0;
175		✗	p->avg_sigma_x2 = 0;
176		✗	p->min_run = 0;
177		✗	p->max_run = 0;
178		✗	p->min_runs = 0;
179		✗	p->max_runs = 0;
180		✗	p->diff1_sum = 0;
181		✗	p->diff1_sum_x2 = 0;
182		✗	p->mask[0] = 0;
183		✗	p->mask[1] = 0;
184		✗	p->mask[2] =~0;
185		✗	p->mask[3] = 0;
186		✗	p->min_count = 0;
187		✗	p->max_count = 0;
188		✗	p->abs_peak_count = 0;
189		✗	p->zero_runs = 0;
190		✗	p->nb_samples = 0;
191		✗	p->nb_nans = 0;
192		✗	p->nb_infs = 0;
193		✗	p->nb_denormals = 0;
194		✗	p->last = NAN;
195		✗	p->noise_floor = NAN;
196		✗	p->noise_floor_count = 0;
197		✗	p->entropy = 0;
198		✗	p->win_pos = 0;
199		✗	p->sorted_front = 0;
200		✗	p->sorted_back = 0;
201		✗	memset(p->win_samples, 0, s->tc_samples * sizeof(*p->win_samples));
202		✗	memset(p->ehistogram, 0, sizeof(p->ehistogram));
203		✗	for (int n = 0; n < s->tc_samples; n++)
204		✗	p->sorted_samples[n] = -1.0;
205			}
206		✗	}
207
208		✗	static int config_output(AVFilterLink *outlink)
209			{
210		✗	AudioStatsContext *s = outlink->src->priv;
211
212		✗	s->chstats = av_calloc(sizeof(*s->chstats), outlink->ch_layout.nb_channels);
213		✗	if (!s->chstats)
214		✗	return AVERROR(ENOMEM);
215
216		✗	s->tc_samples = FFMAX(s->time_constant * outlink->sample_rate + .5, 1);
217		✗	s->nb_channels = outlink->ch_layout.nb_channels;
218
219		✗	for (int i = 0; i < s->nb_channels; i++) {
220		✗	ChannelStats *p = &s->chstats[i];
221
222		✗	p->win_samples = av_calloc(s->tc_samples, sizeof(*p->win_samples));
223		✗	if (!p->win_samples)
224		✗	return AVERROR(ENOMEM);
225
226		✗	p->sorted_samples = av_calloc(s->tc_samples, sizeof(*p->sorted_samples));
227		✗	if (!p->sorted_samples)
228		✗	return AVERROR(ENOMEM);
229			}
230
231		✗	s->mult = exp((-1 / s->time_constant / outlink->sample_rate));
232		✗	s->nb_frames = 0;
233		✗	s->maxbitdepth = av_get_bytes_per_sample(outlink->format) * 8;
234		✗	s->is_double = outlink->format == AV_SAMPLE_FMT_DBL ||
235		✗	outlink->format == AV_SAMPLE_FMT_DBLP;
236
237		✗	s->is_float = outlink->format == AV_SAMPLE_FMT_FLT ||
238		✗	outlink->format == AV_SAMPLE_FMT_FLTP;
239
240		✗	reset_stats(s);
241
242		✗	return 0;
243			}
244
245		✗	static void bit_depth(AudioStatsContext *s, const uint64_t *const mask, uint8_t *depth)
246			{
247		✗	unsigned result = s->maxbitdepth;
248		✗	uint64_t amask = mask[1] & (~mask[2]);
249
250		✗	depth[0] = 0;
251		✗	for (int i = 0; i < result; i++)
252		✗	depth[0] += !!(mask[0] & (1ULL << i));
253
254		✗	depth[1] = 0;
255		✗	for (int i = 0; i < result; i++)
256		✗	depth[1] += !!(mask[1] & (1ULL << i));
257
258		✗	depth[2] = result;
259		✗	for (int i = 0; i < result && !(amask & 1); i++) {
260		✗	depth[2]--;
261		✗	amask >>= 1;
262			}
263
264		✗	depth[3] = 0;
265		✗	for (int i = 0; i < result; i++)
266		✗	depth[3] += !!(mask[3] & (1ULL << i));
267		✗	}
268
269		✗	static double calc_entropy(AudioStatsContext *s, ChannelStats *p)
270			{
271		✗	double entropy = 0.;
272
273		✗	for (int i = 0; i < HISTOGRAM_SIZE; i++) {
274		✗	double entry = p->ehistogram[i] / ((double)p->nb_samples);
275
276		✗	if (entry > 1e-8)
277		✗	entropy += entry * log2(entry);
278			}
279
280		✗	return -entropy / log2(HISTOGRAM_SIZE);
281			}
282
283		✗	static double calc_noise_floor(double *ss, double x, double px,
284			int n, int *ffront, int *bback)
285			{
286		✗	double r, ax = fabs(x);
287		✗	int front = *ffront;
288		✗	int back = *bback;
289		✗	int empty = front == back && ss[front] == -1.0;
290
291		✗	if (!empty && fabs(px) == ss[front]) {
292		✗	ss[front] = -1.0;
293		✗	if (back != front) {
294		✗	front--;
295		✗	if (front < 0)
296		✗	front = n - 1;
297			}
298		✗	empty = front == back;
299			}
300
301		✗	if (!empty && ax >= ss[front]) {
302			while (1) {
303		✗	ss[front] = -1.0;
304		✗	if (back == front) {
305		✗	empty = 1;
306		✗	break;
307			}
308		✗	front--;
309		✗	if (front < 0)
310		✗	front = n - 1;
311			}
312			}
313
314		✗	while (!empty && ax >= ss[back]) {
315		✗	ss[back] = -1.0;
316		✗	if (back == front) {
317		✗	empty = 1;
318		✗	break;
319			}
320		✗	back++;
321		✗	if (back >= n)
322		✗	back = 0;
323			}
324
325		✗	if (!empty) {
326		✗	back--;
327		✗	if (back < 0)
328		✗	back = n - 1;
329			}
330
331		✗	ss[back] = ax;
332		✗	r = ss[front];
333
334		✗	*ffront = front;
335		✗	*bback = back;
336
337		✗	return r;
338			}
339
340		✗	static inline void update_minmax(AudioStatsContext *s, ChannelStats *p, double d)
341			{
342		✗	if (d < p->min)
343		✗	p->min = d;
344		✗	if (d > p->max)
345		✗	p->max = d;
346		✗	}
347
348		✗	static inline void update_stat(AudioStatsContext *s, ChannelStats *p, double d, double nd, int64_t i)
349			{
350		✗	double abs_d = FFABS(d);
351			double drop, noise_floor;
352			int index;
353
354		✗	if (p->abs_peak < abs_d) {
355		✗	p->abs_peak = abs_d;
356		✗	p->abs_peak_count = 1;
357		✗	} else if (p->abs_peak == abs_d) {
358		✗	p->abs_peak_count++;
359			}
360		✗	if (d < p->min) {
361		✗	p->min = d;
362		✗	p->nmin = nd;
363		✗	p->min_run = 1;
364		✗	p->min_runs = 0;
365		✗	p->min_count = 1;
366		✗	} else if (d == p->min) {
367		✗	p->min_count++;
368		✗	p->min_run = d == p->last ? p->min_run + 1 : 1;
369		✗	} else if (p->last == p->min) {
370		✗	p->min_runs += p->min_run * p->min_run;
371			}
372
373		✗	if (d != 0 && FFABS(d) < p->min_non_zero)
374		✗	p->min_non_zero = FFABS(d);
375
376		✗	if (d > p->max) {
377		✗	p->max = d;
378		✗	p->nmax = nd;
379		✗	p->max_run = 1;
380		✗	p->max_runs = 0;
381		✗	p->max_count = 1;
382		✗	} else if (d == p->max) {
383		✗	p->max_count++;
384		✗	p->max_run = d == p->last ? p->max_run + 1 : 1;
385		✗	} else if (p->last == p->max) {
386		✗	p->max_runs += p->max_run * p->max_run;
387			}
388
389		✗	if (d != 0) {
390		✗	p->zero_runs += FFSIGN(d) != FFSIGN(p->last_non_zero);
391		✗	p->last_non_zero = d;
392			}
393
394		✗	p->sigma_x += nd;
395		✗	p->sigma_x2 += nd * nd;
396		✗	p->avg_sigma_x2 = p->avg_sigma_x2 * s->mult + (1.0 - s->mult) * nd * nd;
397		✗	if (!isnan(p->last)) {
398		✗	p->min_diff = FFMIN(p->min_diff, fabs(d - p->last));
399		✗	p->max_diff = FFMAX(p->max_diff, fabs(d - p->last));
400		✗	p->diff1_sum += fabs(d - p->last);
401		✗	p->diff1_sum_x2 += (d - p->last) * (d - p->last);
402			}
403		✗	p->mask[0] |= (i < 0) ? -i : i;
404		✗	p->mask[1] |= i;
405		✗	p->mask[2] &= i;
406		✗	if (!isnan(p->last))
407		✗	p->mask[3] |= i ^ p->lasti;
408		✗	p->lasti = i;
409		✗	p->last = d;
410
411		✗	drop = p->win_samples[p->win_pos];
412		✗	p->win_samples[p->win_pos] = nd;
413		✗	index = av_clip(lrint(av_clipd(FFABS(nd), 0.0, 1.0) * HISTOGRAM_MAX), 0, HISTOGRAM_MAX);
414		✗	p->max_index = FFMAX(p->max_index, index);
415		✗	p->ehistogram[index]++;
416		✗	p->win_pos++;
417
418		✗	if (p->win_pos >= s->tc_samples)
419		✗	p->win_pos = 0;
420
421		✗	if (p->nb_samples >= s->tc_samples) {
422		✗	p->max_sigma_x2 = FFMAX(p->max_sigma_x2, p->avg_sigma_x2);
423		✗	p->min_sigma_x2 = FFMIN(p->min_sigma_x2, p->avg_sigma_x2);
424			}
425		✗	p->nb_samples++;
426
427		✗	noise_floor = calc_noise_floor(p->sorted_samples, nd, drop,
428		✗	s->tc_samples, &p->sorted_front, &p->sorted_back);
429		✗	if (p->nb_samples >= s->tc_samples) {
430		✗	if (isnan(p->noise_floor)) {
431		✗	p->noise_floor = noise_floor;
432		✗	p->noise_floor_count = 1;
433			} else {
434		✗	if (noise_floor < p->noise_floor) {
435		✗	p->noise_floor = noise_floor;
436		✗	p->noise_floor_count = 1;
437		✗	} else if (noise_floor == p->noise_floor) {
438		✗	p->noise_floor_count++;
439			}
440			}
441			}
442		✗	}
443
444		✗	static inline void update_float_stat(AudioStatsContext *s, ChannelStats *p, float d)
445			{
446		✗	int type = fpclassify(d);
447
448		✗	p->nb_nans += type == FP_NAN;
449		✗	p->nb_infs += type == FP_INFINITE;
450		✗	p->nb_denormals += type == FP_SUBNORMAL;
451		✗	}
452
453		✗	static inline void update_double_stat(AudioStatsContext *s, ChannelStats *p, double d)
454			{
455		✗	int type = fpclassify(d);
456
457		✗	p->nb_nans += type == FP_NAN;
458		✗	p->nb_infs += type == FP_INFINITE;
459		✗	p->nb_denormals += type == FP_SUBNORMAL;
460		✗	}
461
462		✗	static void set_meta(AVDictionary **metadata, int chan, const char *key,
463			const char *fmt, double val)
464			{
465			uint8_t value[128];
466			uint8_t key2[128];
467
468		✗	snprintf(value, sizeof(value), fmt, val);
469		✗	if (chan)
470		✗	snprintf(key2, sizeof(key2), "lavfi.astats.%d.%s", chan, key);
471			else
472		✗	snprintf(key2, sizeof(key2), "lavfi.astats.%s", key);
473		✗	av_dict_set(metadata, key2, value, 0);
474		✗	}
475
476			#define LINEAR_TO_DB(x) (log10(x) * 20)
477
478		✗	static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
479			{
480		✗	uint64_t mask[4], min_count = 0, max_count = 0, nb_samples = 0, noise_floor_count = 0;
481		✗	uint64_t nb_nans = 0, nb_infs = 0, nb_denormals = 0;
482		✗	uint64_t abs_peak_count = 0;
483		✗	double min_runs = 0, max_runs = 0,
484		✗	min = DBL_MAX, max =-DBL_MAX, min_diff = DBL_MAX, max_diff = 0,
485		✗	nmin = DBL_MAX, nmax =-DBL_MAX,
486		✗	max_sigma_x = 0,
487		✗	diff1_sum = 0,
488		✗	diff1_sum_x2 = 0,
489		✗	sigma_x2 = 0,
490		✗	noise_floor = 0,
491		✗	entropy = 0,
492		✗	min_sigma_x2 = DBL_MAX,
493		✗	max_sigma_x2 =-DBL_MAX;
494			uint8_t depth[4];
495			int c;
496
497		✗	mask[0] = 0;
498		✗	mask[1] = 0;
499		✗	mask[2] =~0;
500		✗	mask[3] = 0;
501
502		✗	for (c = 0; c < s->nb_channels; c++) {
503		✗	ChannelStats *p = &s->chstats[c];
504
505		✗	if (p->nb_samples < s->tc_samples)
506		✗	p->min_sigma_x2 = p->max_sigma_x2 = p->sigma_x2 / p->nb_samples;
507
508		✗	min = FFMIN(min, p->min);
509		✗	max = FFMAX(max, p->max);
510		✗	nmin = FFMIN(nmin, p->nmin);
511		✗	nmax = FFMAX(nmax, p->nmax);
512		✗	min_diff = FFMIN(min_diff, p->min_diff);
513		✗	max_diff = FFMAX(max_diff, p->max_diff);
514		✗	diff1_sum += p->diff1_sum;
515		✗	diff1_sum_x2 += p->diff1_sum_x2;
516		✗	min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
517		✗	max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
518		✗	sigma_x2 += p->sigma_x2;
519		✗	noise_floor = FFMAX(noise_floor, p->noise_floor);
520		✗	noise_floor_count += p->noise_floor_count;
521		✗	p->entropy = calc_entropy(s, p);
522		✗	entropy += p->entropy;
523		✗	min_count += p->min_count;
524		✗	max_count += p->max_count;
525		✗	abs_peak_count += p->abs_peak_count;
526		✗	min_runs += p->min_runs;
527		✗	max_runs += p->max_runs;
528		✗	mask[0] |= p->mask[0];
529		✗	mask[1] |= p->mask[1];
530		✗	mask[2] &= p->mask[2];
531		✗	mask[3] |= p->mask[3];
532		✗	nb_samples += p->nb_samples;
533		✗	nb_nans += p->nb_nans;
534		✗	nb_infs += p->nb_infs;
535		✗	nb_denormals += p->nb_denormals;
536		✗	if (fabs(p->sigma_x) > fabs(max_sigma_x))
537		✗	max_sigma_x = p->sigma_x;
538
539		✗	if (s->measure_perchannel & MEASURE_DC_OFFSET)
540		✗	set_meta(metadata, c + 1, "DC_offset", "%f", p->sigma_x / p->nb_samples);
541		✗	if (s->measure_perchannel & MEASURE_MIN_LEVEL)
542		✗	set_meta(metadata, c + 1, "Min_level", "%f", p->min);
543		✗	if (s->measure_perchannel & MEASURE_MAX_LEVEL)
544		✗	set_meta(metadata, c + 1, "Max_level", "%f", p->max);
545		✗	if (s->measure_perchannel & MEASURE_MIN_DIFFERENCE)
546		✗	set_meta(metadata, c + 1, "Min_difference", "%f", p->min_diff);
547		✗	if (s->measure_perchannel & MEASURE_MAX_DIFFERENCE)
548		✗	set_meta(metadata, c + 1, "Max_difference", "%f", p->max_diff);
549		✗	if (s->measure_perchannel & MEASURE_MEAN_DIFFERENCE)
550		✗	set_meta(metadata, c + 1, "Mean_difference", "%f", p->diff1_sum / (p->nb_samples - 1));
551		✗	if (s->measure_perchannel & MEASURE_RMS_DIFFERENCE)
552		✗	set_meta(metadata, c + 1, "RMS_difference", "%f", sqrt(p->diff1_sum_x2 / (p->nb_samples - 1)));
553		✗	if (s->measure_perchannel & MEASURE_PEAK_LEVEL)
554		✗	set_meta(metadata, c + 1, "Peak_level", "%f", LINEAR_TO_DB(FFMAX(-p->nmin, p->nmax)));
555		✗	if (s->measure_perchannel & MEASURE_RMS_LEVEL)
556		✗	set_meta(metadata, c + 1, "RMS_level", "%f", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
557		✗	if (s->measure_perchannel & MEASURE_RMS_PEAK)
558		✗	set_meta(metadata, c + 1, "RMS_peak", "%f", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
559		✗	if (s->measure_perchannel & MEASURE_RMS_TROUGH)
560		✗	set_meta(metadata, c + 1, "RMS_trough", "%f", LINEAR_TO_DB(sqrt(p->min_sigma_x2)));
561		✗	if (s->measure_perchannel & MEASURE_CREST_FACTOR)
562		✗	set_meta(metadata, c + 1, "Crest_factor", "%f", p->sigma_x2 ? FFMAX(-p->min, p->max) / sqrt(p->sigma_x2 / p->nb_samples) : 1);
563		✗	if (s->measure_perchannel & MEASURE_FLAT_FACTOR)
564		✗	set_meta(metadata, c + 1, "Flat_factor", "%f", LINEAR_TO_DB((p->min_runs + p->max_runs) / (p->min_count + p->max_count)));
565		✗	if (s->measure_perchannel & MEASURE_PEAK_COUNT)
566		✗	set_meta(metadata, c + 1, "Peak_count", "%f", (float)(p->min_count + p->max_count));
567		✗	if (s->measure_perchannel & MEASURE_ABS_PEAK_COUNT)
568		✗	set_meta(metadata, c + 1, "Peak_count", "%f", p->abs_peak_count);
569		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR)
570		✗	set_meta(metadata, c + 1, "Noise_floor", "%f", LINEAR_TO_DB(p->noise_floor));
571		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR_COUNT)
572		✗	set_meta(metadata, c + 1, "Noise_floor_count", "%f", p->noise_floor_count);
573		✗	if (s->measure_perchannel & MEASURE_ENTROPY)
574		✗	set_meta(metadata, c + 1, "Entropy", "%f", p->entropy);
575		✗	if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
576		✗	bit_depth(s, p->mask, depth);
577		✗	set_meta(metadata, c + 1, "Bit_depth", "%f", depth[0]);
578		✗	set_meta(metadata, c + 1, "Bit_depth2", "%f", depth[1]);
579		✗	set_meta(metadata, c + 1, "Bit_depth3", "%f", depth[2]);
580		✗	set_meta(metadata, c + 1, "Bit_depth4", "%f", depth[3]);
581			}
582		✗	if (s->measure_perchannel & MEASURE_DYNAMIC_RANGE)
583		✗	set_meta(metadata, c + 1, "Dynamic_range", "%f", LINEAR_TO_DB(2 * FFMAX(FFABS(p->min), FFABS(p->max))/ p->min_non_zero));
584		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS)
585		✗	set_meta(metadata, c + 1, "Zero_crossings", "%f", p->zero_runs);
586		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS_RATE)
587		✗	set_meta(metadata, c + 1, "Zero_crossings_rate", "%f", p->zero_runs/(double)p->nb_samples);
588		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_NANS)
589		✗	set_meta(metadata, c + 1, "Number of NaNs", "%f", p->nb_nans);
590		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_INFS)
591		✗	set_meta(metadata, c + 1, "Number of Infs", "%f", p->nb_infs);
592		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_DENORMALS)
593		✗	set_meta(metadata, c + 1, "Number of denormals", "%f", p->nb_denormals);
594			}
595
596		✗	if (s->measure_overall & MEASURE_DC_OFFSET)
597		✗	set_meta(metadata, 0, "Overall.DC_offset", "%f", max_sigma_x / (nb_samples / s->nb_channels));
598		✗	if (s->measure_overall & MEASURE_MIN_LEVEL)
599		✗	set_meta(metadata, 0, "Overall.Min_level", "%f", min);
600		✗	if (s->measure_overall & MEASURE_MAX_LEVEL)
601		✗	set_meta(metadata, 0, "Overall.Max_level", "%f", max);
602		✗	if (s->measure_overall & MEASURE_MIN_DIFFERENCE)
603		✗	set_meta(metadata, 0, "Overall.Min_difference", "%f", min_diff);
604		✗	if (s->measure_overall & MEASURE_MAX_DIFFERENCE)
605		✗	set_meta(metadata, 0, "Overall.Max_difference", "%f", max_diff);
606		✗	if (s->measure_overall & MEASURE_MEAN_DIFFERENCE)
607		✗	set_meta(metadata, 0, "Overall.Mean_difference", "%f", diff1_sum / (nb_samples - s->nb_channels));
608		✗	if (s->measure_overall & MEASURE_RMS_DIFFERENCE)
609		✗	set_meta(metadata, 0, "Overall.RMS_difference", "%f", sqrt(diff1_sum_x2 / (nb_samples - s->nb_channels)));
610		✗	if (s->measure_overall & MEASURE_PEAK_LEVEL)
611		✗	set_meta(metadata, 0, "Overall.Peak_level", "%f", LINEAR_TO_DB(FFMAX(-nmin, nmax)));
612		✗	if (s->measure_overall & MEASURE_RMS_LEVEL)
613		✗	set_meta(metadata, 0, "Overall.RMS_level", "%f", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
614		✗	if (s->measure_overall & MEASURE_RMS_PEAK)
615		✗	set_meta(metadata, 0, "Overall.RMS_peak", "%f", LINEAR_TO_DB(sqrt(max_sigma_x2)));
616		✗	if (s->measure_overall & MEASURE_RMS_TROUGH)
617		✗	set_meta(metadata, 0, "Overall.RMS_trough", "%f", LINEAR_TO_DB(sqrt(min_sigma_x2)));
618		✗	if (s->measure_overall & MEASURE_FLAT_FACTOR)
619		✗	set_meta(metadata, 0, "Overall.Flat_factor", "%f", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
620		✗	if (s->measure_overall & MEASURE_PEAK_COUNT)
621		✗	set_meta(metadata, 0, "Overall.Peak_count", "%f", (float)(min_count + max_count) / (double)s->nb_channels);
622		✗	if (s->measure_overall & MEASURE_ABS_PEAK_COUNT)
623		✗	set_meta(metadata, 0, "Overall.Abs_Peak_count", "%f", (float)(abs_peak_count) / (double)s->nb_channels);
624		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR)
625		✗	set_meta(metadata, 0, "Overall.Noise_floor", "%f", LINEAR_TO_DB(noise_floor));
626		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR_COUNT)
627		✗	set_meta(metadata, 0, "Overall.Noise_floor_count", "%f", noise_floor_count / (double)s->nb_channels);
628		✗	if (s->measure_overall & MEASURE_ENTROPY)
629		✗	set_meta(metadata, 0, "Overall.Entropy", "%f", entropy / (double)s->nb_channels);
630		✗	if (s->measure_overall & MEASURE_BIT_DEPTH) {
631		✗	bit_depth(s, mask, depth);
632		✗	set_meta(metadata, 0, "Overall.Bit_depth", "%f", depth[0]);
633		✗	set_meta(metadata, 0, "Overall.Bit_depth2", "%f", depth[1]);
634		✗	set_meta(metadata, 0, "Overall.Bit_depth3", "%f", depth[2]);
635		✗	set_meta(metadata, 0, "Overall.Bit_depth4", "%f", depth[3]);
636			}
637		✗	if (s->measure_overall & MEASURE_NUMBER_OF_SAMPLES)
638		✗	set_meta(metadata, 0, "Overall.Number_of_samples", "%f", nb_samples / s->nb_channels);
639		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_NANS)
640		✗	set_meta(metadata, 0, "Number of NaNs", "%f", nb_nans / (float)s->nb_channels);
641		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_INFS)
642		✗	set_meta(metadata, 0, "Number of Infs", "%f", nb_infs / (float)s->nb_channels);
643		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_DENORMALS)
644		✗	set_meta(metadata, 0, "Number of denormals", "%f", nb_denormals / (float)s->nb_channels);
645		✗	}
646
647			#define UPDATE_STATS_P(type, update_func, update_float, channel_func) \
648			for (int c = start; c < end; c++) { \
649			ChannelStats *p = &s->chstats[c]; \
650			const type *src = (const type *)data[c]; \
651			const type * const srcend = src + samples; \
652			for (; src < srcend; src++) { \
653			update_func; \
654			update_float; \
655			} \
656			channel_func; \
657			}
658
659			#define UPDATE_STATS_I(type, update_func, update_float, channel_func) \
660			for (int c = start; c < end; c++) { \
661			ChannelStats *p = &s->chstats[c]; \
662			const type *src = (const type *)data[0]; \
663			const type * const srcend = src + samples * channels; \
664			for (src += c; src < srcend; src += channels) { \
665			update_func; \
666			update_float; \
667			} \
668			channel_func; \
669			}
670
671			#define UPDATE_STATS(planar, type, sample, normalizer_suffix, int_sample) \
672			if ((s->measure_overall | s->measure_perchannel) & ~MEASURE_MINMAXPEAK) { \
673			UPDATE_STATS_##planar(type, update_stat(s, p, sample, sample normalizer_suffix, int_sample), s->is_float ? update_float_stat(s, p, sample) : s->is_double ? update_double_stat(s, p, sample) : (void)NULL, ); \
674			} else { \
675			UPDATE_STATS_##planar(type, update_minmax(s, p, sample), , p->nmin = p->min normalizer_suffix; p->nmax = p->max normalizer_suffix;); \
676			}
677
678		✗	static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
679			{
680		✗	AudioStatsContext *s = ctx->priv;
681		✗	AVFilterLink *inlink = ctx->inputs[0];
682		✗	AVFrame *buf = arg;
683		✗	const uint8_t * const * const data = (const uint8_t * const *)buf->extended_data;
684		✗	const int channels = s->nb_channels;
685		✗	const int samples = buf->nb_samples;
686		✗	const int start = (buf->ch_layout.nb_channels * jobnr) / nb_jobs;
687		✗	const int end = (buf->ch_layout.nb_channels * (jobnr+1)) / nb_jobs;
688
689		✗	switch (inlink->format) {
690		✗	case AV_SAMPLE_FMT_DBLP:
691		✗	UPDATE_STATS(P, double, *src, , llrint(*src * (UINT64_C(1) << 63)));
692		✗	break;
693		✗	case AV_SAMPLE_FMT_DBL:
694		✗	UPDATE_STATS(I, double, *src, , llrint(*src * (UINT64_C(1) << 63)));
695		✗	break;
696		✗	case AV_SAMPLE_FMT_FLTP:
697		✗	UPDATE_STATS(P, float, *src, , llrint(*src * (UINT64_C(1) << 31)));
698		✗	break;
699		✗	case AV_SAMPLE_FMT_FLT:
700		✗	UPDATE_STATS(I, float, *src, , llrint(*src * (UINT64_C(1) << 31)));
701		✗	break;
702		✗	case AV_SAMPLE_FMT_S64P:
703		✗	UPDATE_STATS(P, int64_t, *src, / (double)INT64_MAX, *src);
704		✗	break;
705		✗	case AV_SAMPLE_FMT_S64:
706		✗	UPDATE_STATS(I, int64_t, *src, / (double)INT64_MAX, *src);
707		✗	break;
708		✗	case AV_SAMPLE_FMT_S32P:
709		✗	UPDATE_STATS(P, int32_t, *src, / (double)INT32_MAX, *src);
710		✗	break;
711		✗	case AV_SAMPLE_FMT_S32:
712		✗	UPDATE_STATS(I, int32_t, *src, / (double)INT32_MAX, *src);
713		✗	break;
714		✗	case AV_SAMPLE_FMT_S16P:
715		✗	UPDATE_STATS(P, int16_t, *src, / (double)INT16_MAX, *src);
716		✗	break;
717		✗	case AV_SAMPLE_FMT_S16:
718		✗	UPDATE_STATS(I, int16_t, *src, / (double)INT16_MAX, *src);
719		✗	break;
720			}
721
722		✗	return 0;
723			}
724
725		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
726			{
727		✗	AVFilterContext *ctx = inlink->dst;
728		✗	AudioStatsContext *s = ctx->priv;
729		✗	AVDictionary **metadata = &buf->metadata;
730
731		✗	if (s->reset_count > 0) {
732		✗	if (s->nb_frames >= s->reset_count) {
733		✗	reset_stats(s);
734		✗	s->nb_frames = 0;
735			}
736		✗	s->nb_frames++;
737			}
738
739		✗	if (s->used == 0)
740		✗	s->used = buf->nb_samples > 0;
741		✗	ff_filter_execute(ctx, filter_channel, buf, NULL,
742		✗	FFMIN(inlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx)));
743
744		✗	if (s->metadata)
745		✗	set_metadata(s, metadata);
746
747		✗	return ff_filter_frame(inlink->dst->outputs[0], buf);
748			}
749
750		✗	static void print_stats(AVFilterContext *ctx)
751			{
752		✗	AudioStatsContext *s = ctx->priv;
753		✗	uint64_t mask[4], min_count = 0, max_count = 0, nb_samples = 0, noise_floor_count = 0;
754		✗	uint64_t nb_nans = 0, nb_infs = 0, nb_denormals = 0, abs_peak_count = 0;
755		✗	double min_runs = 0, max_runs = 0,
756		✗	min = DBL_MAX, max =-DBL_MAX, min_diff = DBL_MAX, max_diff = 0,
757		✗	nmin = DBL_MAX, nmax =-DBL_MAX,
758		✗	max_sigma_x = 0,
759		✗	diff1_sum_x2 = 0,
760		✗	diff1_sum = 0,
761		✗	sigma_x2 = 0,
762		✗	noise_floor = 0,
763		✗	entropy = 0,
764		✗	min_sigma_x2 = DBL_MAX,
765		✗	max_sigma_x2 =-DBL_MAX;
766			uint8_t depth[4];
767			int c;
768
769		✗	mask[0] = 0;
770		✗	mask[1] = 0;
771		✗	mask[2] =~0;
772		✗	mask[3] = 0;
773
774		✗	for (c = 0; c < s->nb_channels; c++) {
775		✗	ChannelStats *p = &s->chstats[c];
776
777		✗	if (p->nb_samples == 0 && !s->used)
778		✗	continue;
779
780		✗	if (p->nb_samples < s->tc_samples)
781		✗	p->min_sigma_x2 = p->max_sigma_x2 = p->sigma_x2 / p->nb_samples;
782
783		✗	min = FFMIN(min, p->min);
784		✗	max = FFMAX(max, p->max);
785		✗	nmin = FFMIN(nmin, p->nmin);
786		✗	nmax = FFMAX(nmax, p->nmax);
787		✗	min_diff = FFMIN(min_diff, p->min_diff);
788		✗	max_diff = FFMAX(max_diff, p->max_diff);
789		✗	diff1_sum_x2 += p->diff1_sum_x2;
790		✗	diff1_sum += p->diff1_sum;
791		✗	min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
792		✗	max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
793		✗	sigma_x2 += p->sigma_x2;
794		✗	noise_floor = FFMAX(noise_floor, p->noise_floor);
795		✗	p->entropy = calc_entropy(s, p);
796		✗	entropy += p->entropy;
797		✗	min_count += p->min_count;
798		✗	max_count += p->max_count;
799		✗	abs_peak_count += p->abs_peak_count;
800		✗	noise_floor_count += p->noise_floor_count;
801		✗	min_runs += p->min_runs;
802		✗	max_runs += p->max_runs;
803		✗	mask[0] |= p->mask[0];
804		✗	mask[1] |= p->mask[1];
805		✗	mask[2] &= p->mask[2];
806		✗	mask[3] |= p->mask[3];
807		✗	nb_samples += p->nb_samples;
808		✗	nb_nans += p->nb_nans;
809		✗	nb_infs += p->nb_infs;
810		✗	nb_denormals += p->nb_denormals;
811		✗	if (fabs(p->sigma_x) > fabs(max_sigma_x))
812		✗	max_sigma_x = p->sigma_x;
813
814		✗	if (s->measure_perchannel != MEASURE_NONE)
815		✗	av_log(ctx, AV_LOG_INFO, "Channel: %d\n", c + 1);
816		✗	if (s->measure_perchannel & MEASURE_DC_OFFSET)
817		✗	av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", p->sigma_x / p->nb_samples);
818		✗	if (s->measure_perchannel & MEASURE_MIN_LEVEL)
819		✗	av_log(ctx, AV_LOG_INFO, "Min level: %f\n", p->min);
820		✗	if (s->measure_perchannel & MEASURE_MAX_LEVEL)
821		✗	av_log(ctx, AV_LOG_INFO, "Max level: %f\n", p->max);
822		✗	if (s->measure_perchannel & MEASURE_MIN_DIFFERENCE)
823		✗	av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", p->min_diff);
824		✗	if (s->measure_perchannel & MEASURE_MAX_DIFFERENCE)
825		✗	av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", p->max_diff);
826		✗	if (s->measure_perchannel & MEASURE_MEAN_DIFFERENCE)
827		✗	av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", p->diff1_sum / (p->nb_samples - 1));
828		✗	if (s->measure_perchannel & MEASURE_RMS_DIFFERENCE)
829		✗	av_log(ctx, AV_LOG_INFO, "RMS difference: %f\n", sqrt(p->diff1_sum_x2 / (p->nb_samples - 1)));
830		✗	if (s->measure_perchannel & MEASURE_PEAK_LEVEL)
831		✗	av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-p->nmin, p->nmax)));
832		✗	if (s->measure_perchannel & MEASURE_RMS_LEVEL)
833		✗	av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
834		✗	if (s->measure_perchannel & MEASURE_RMS_PEAK)
835		✗	av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
836		✗	if (s->measure_perchannel & MEASURE_RMS_TROUGH)
837		✗	if (p->min_sigma_x2 != 1)
838		✗	av_log(ctx, AV_LOG_INFO, "RMS trough dB: %f\n",LINEAR_TO_DB(sqrt(p->min_sigma_x2)));
839		✗	if (s->measure_perchannel & MEASURE_CREST_FACTOR)
840		✗	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);
841		✗	if (s->measure_perchannel & MEASURE_FLAT_FACTOR)
842		✗	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)));
843		✗	if (s->measure_perchannel & MEASURE_PEAK_COUNT)
844		✗	av_log(ctx, AV_LOG_INFO, "Peak count: %"PRId64"\n", p->min_count + p->max_count);
845		✗	if (s->measure_perchannel & MEASURE_ABS_PEAK_COUNT)
846		✗	av_log(ctx, AV_LOG_INFO, "Abs Peak count: %"PRId64"\n", p->abs_peak_count);
847		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR)
848		✗	av_log(ctx, AV_LOG_INFO, "Noise floor dB: %f\n", LINEAR_TO_DB(p->noise_floor));
849		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR_COUNT)
850		✗	av_log(ctx, AV_LOG_INFO, "Noise floor count: %"PRId64"\n", p->noise_floor_count);
851		✗	if (s->measure_perchannel & MEASURE_ENTROPY)
852		✗	av_log(ctx, AV_LOG_INFO, "Entropy: %f\n", p->entropy);
853		✗	if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
854		✗	bit_depth(s, p->mask, depth);
855		✗	av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u/%u/%u\n", depth[0], depth[1], depth[2], depth[3]);
856			}
857		✗	if (s->measure_perchannel & MEASURE_DYNAMIC_RANGE)
858		✗	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));
859		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS)
860		✗	av_log(ctx, AV_LOG_INFO, "Zero crossings: %"PRId64"\n", p->zero_runs);
861		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS_RATE)
862		✗	av_log(ctx, AV_LOG_INFO, "Zero crossings rate: %f\n", p->zero_runs/(double)p->nb_samples);
863		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_NANS)
864		✗	av_log(ctx, AV_LOG_INFO, "Number of NaNs: %"PRId64"\n", p->nb_nans);
865		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_INFS)
866		✗	av_log(ctx, AV_LOG_INFO, "Number of Infs: %"PRId64"\n", p->nb_infs);
867		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_DENORMALS)
868		✗	av_log(ctx, AV_LOG_INFO, "Number of denormals: %"PRId64"\n", p->nb_denormals);
869			}
870
871		✗	if (nb_samples == 0 && !s->used)
872		✗	return;
873
874		✗	if (s->measure_overall != MEASURE_NONE)
875		✗	av_log(ctx, AV_LOG_INFO, "Overall\n");
876		✗	if (s->measure_overall & MEASURE_DC_OFFSET)
877		✗	av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", max_sigma_x / (nb_samples / s->nb_channels));
878		✗	if (s->measure_overall & MEASURE_MIN_LEVEL)
879		✗	av_log(ctx, AV_LOG_INFO, "Min level: %f\n", min);
880		✗	if (s->measure_overall & MEASURE_MAX_LEVEL)
881		✗	av_log(ctx, AV_LOG_INFO, "Max level: %f\n", max);
882		✗	if (s->measure_overall & MEASURE_MIN_DIFFERENCE)
883		✗	av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", min_diff);
884		✗	if (s->measure_overall & MEASURE_MAX_DIFFERENCE)
885		✗	av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", max_diff);
886		✗	if (s->measure_overall & MEASURE_MEAN_DIFFERENCE)
887		✗	av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", diff1_sum / (nb_samples - s->nb_channels));
888		✗	if (s->measure_overall & MEASURE_RMS_DIFFERENCE)
889		✗	av_log(ctx, AV_LOG_INFO, "RMS difference: %f\n", sqrt(diff1_sum_x2 / (nb_samples - s->nb_channels)));
890		✗	if (s->measure_overall & MEASURE_PEAK_LEVEL)
891		✗	av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-nmin, nmax)));
892		✗	if (s->measure_overall & MEASURE_RMS_LEVEL)
893		✗	av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
894		✗	if (s->measure_overall & MEASURE_RMS_PEAK)
895		✗	av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(max_sigma_x2)));
896		✗	if (s->measure_overall & MEASURE_RMS_TROUGH)
897		✗	if (min_sigma_x2 != 1)
898		✗	av_log(ctx, AV_LOG_INFO, "RMS trough dB: %f\n", LINEAR_TO_DB(sqrt(min_sigma_x2)));
899		✗	if (s->measure_overall & MEASURE_FLAT_FACTOR)
900		✗	av_log(ctx, AV_LOG_INFO, "Flat factor: %f\n", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
901		✗	if (s->measure_overall & MEASURE_PEAK_COUNT)
902		✗	av_log(ctx, AV_LOG_INFO, "Peak count: %f\n", (min_count + max_count) / (double)s->nb_channels);
903		✗	if (s->measure_overall & MEASURE_ABS_PEAK_COUNT)
904		✗	av_log(ctx, AV_LOG_INFO, "Abs Peak count: %f\n", abs_peak_count / (double)s->nb_channels);
905		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR)
906		✗	av_log(ctx, AV_LOG_INFO, "Noise floor dB: %f\n", LINEAR_TO_DB(noise_floor));
907		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR_COUNT)
908		✗	av_log(ctx, AV_LOG_INFO, "Noise floor count: %f\n", noise_floor_count / (double)s->nb_channels);
909		✗	if (s->measure_overall & MEASURE_ENTROPY)
910		✗	av_log(ctx, AV_LOG_INFO, "Entropy: %f\n", entropy / (double)s->nb_channels);
911		✗	if (s->measure_overall & MEASURE_BIT_DEPTH) {
912		✗	bit_depth(s, mask, depth);
913		✗	av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u/%u/%u\n", depth[0], depth[1], depth[2], depth[3]);
914			}
915		✗	if (s->measure_overall & MEASURE_NUMBER_OF_SAMPLES)
916		✗	av_log(ctx, AV_LOG_INFO, "Number of samples: %"PRId64"\n", nb_samples / s->nb_channels);
917		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_NANS)
918		✗	av_log(ctx, AV_LOG_INFO, "Number of NaNs: %f\n", nb_nans / (float)s->nb_channels);
919		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_INFS)
920		✗	av_log(ctx, AV_LOG_INFO, "Number of Infs: %f\n", nb_infs / (float)s->nb_channels);
921		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_DENORMALS)
922		✗	av_log(ctx, AV_LOG_INFO, "Number of denormals: %f\n", nb_denormals / (float)s->nb_channels);
923			}
924
925		✗	static av_cold void uninit(AVFilterContext *ctx)
926			{
927		✗	AudioStatsContext *s = ctx->priv;
928
929		✗	if (s->nb_channels)
930		✗	print_stats(ctx);
931		✗	if (s->chstats) {
932		✗	for (int i = 0; i < s->nb_channels; i++) {
933		✗	ChannelStats *p = &s->chstats[i];
934
935		✗	av_freep(&p->win_samples);
936		✗	av_freep(&p->sorted_samples);
937			}
938			}
939		✗	av_freep(&s->chstats);
940		✗	}
941
942			static const AVFilterPad astats_inputs[] = {
943			{
944			.name = "default",
945			.type = AVMEDIA_TYPE_AUDIO,
946			.filter_frame = filter_frame,
947			},
948			};
949
950			static const AVFilterPad astats_outputs[] = {
951			{
952			.name = "default",
953			.type = AVMEDIA_TYPE_AUDIO,
954			.config_props = config_output,
955			},
956			};
957
958			const AVFilter ff_af_astats = {
959			.name = "astats",
960			.description = NULL_IF_CONFIG_SMALL("Show time domain statistics about audio frames."),
961			.priv_size = sizeof(AudioStatsContext),
962			.priv_class = &astats_class,
963			.uninit = uninit,
964			FILTER_INPUTS(astats_inputs),
965			FILTER_OUTPUTS(astats_outputs),
966			FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16P,
967			AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32P,
968			AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64P,
969			AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
970			AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP),
971			.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_METADATA_ONLY,
972			};
973