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/mem.h"
26			#include "libavutil/opt.h"
27			#include "audio.h"
28			#include "avfilter.h"
29			#include "filters.h"
30
31			#define HISTOGRAM_SIZE 8192
32			#define HISTOGRAM_MAX (HISTOGRAM_SIZE-1)
33
34			#define MEASURE_ALL UINT_MAX
35			#define MEASURE_NONE 0
36
37			#define MEASURE_DC_OFFSET (1 << 0)
38			#define MEASURE_MIN_LEVEL (1 << 1)
39			#define MEASURE_MAX_LEVEL (1 << 2)
40			#define MEASURE_MIN_DIFFERENCE (1 << 3)
41			#define MEASURE_MAX_DIFFERENCE (1 << 4)
42			#define MEASURE_MEAN_DIFFERENCE (1 << 5)
43			#define MEASURE_RMS_DIFFERENCE (1 << 6)
44			#define MEASURE_PEAK_LEVEL (1 << 7)
45			#define MEASURE_RMS_LEVEL (1 << 8)
46			#define MEASURE_RMS_PEAK (1 << 9)
47			#define MEASURE_RMS_TROUGH (1 << 10)
48			#define MEASURE_CREST_FACTOR (1 << 11)
49			#define MEASURE_FLAT_FACTOR (1 << 12)
50			#define MEASURE_PEAK_COUNT (1 << 13)
51			#define MEASURE_BIT_DEPTH (1 << 14)
52			#define MEASURE_DYNAMIC_RANGE (1 << 15)
53			#define MEASURE_ZERO_CROSSINGS (1 << 16)
54			#define MEASURE_ZERO_CROSSINGS_RATE (1 << 17)
55			#define MEASURE_NUMBER_OF_SAMPLES (1 << 18)
56			#define MEASURE_NUMBER_OF_NANS (1 << 19)
57			#define MEASURE_NUMBER_OF_INFS (1 << 20)
58			#define MEASURE_NUMBER_OF_DENORMALS (1 << 21)
59			#define MEASURE_NOISE_FLOOR (1 << 22)
60			#define MEASURE_NOISE_FLOOR_COUNT (1 << 23)
61			#define MEASURE_ENTROPY (1 << 24)
62			#define MEASURE_ABS_PEAK_COUNT (1 << 25)
63
64			#define MEASURE_MINMAXPEAK (MEASURE_MIN_LEVEL | MEASURE_MAX_LEVEL | MEASURE_PEAK_LEVEL)
65
66			typedef struct ChannelStats {
67			double last;
68			double last_non_zero;
69			double min_non_zero;
70			double sigma_x, sigma_x2;
71			double avg_sigma_x2, min_sigma_x2, max_sigma_x2;
72			double min, max;
73			double nmin, nmax;
74			double min_run, max_run;
75			double min_runs, max_runs;
76			double min_diff, max_diff;
77			double diff1_sum;
78			double diff1_sum_x2;
79			double abs_peak;
80			uint64_t mask[4];
81			uint64_t min_count, max_count;
82			uint64_t abs_peak_count;
83			uint64_t noise_floor_count;
84			uint64_t zero_runs;
85			uint64_t nb_samples;
86			uint64_t nb_nans;
87			uint64_t nb_infs;
88			uint64_t nb_denormals;
89			double *win_samples;
90			double *sorted_samples;
91			uint64_t ehistogram[HISTOGRAM_SIZE];
92			int64_t lasti;
93			int sorted_front;
94			int sorted_back;
95			int win_pos;
96			int max_index;
97			double noise_floor;
98			double entropy;
99			} ChannelStats;
100
101			typedef struct AudioStatsContext {
102			const AVClass *class;
103			ChannelStats *chstats;
104			int nb_channels;
105			uint64_t tc_samples;
106			double time_constant;
107			double mult;
108			int metadata;
109			int used;
110			int reset_count;
111			int nb_frames;
112			int maxbitdepth;
113			int measure_perchannel;
114			int measure_overall;
115			int is_float;
116			int is_double;
117			} AudioStatsContext;
118
119			#define OFFSET(x) offsetof(AudioStatsContext, x)
120			#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
121
122			static const AVOption astats_options[] = {
123			{ "length", "set the window length", OFFSET(time_constant), AV_OPT_TYPE_DOUBLE, {.dbl=.05}, 0, 10, FLAGS },
124			{ "metadata", "inject metadata in the filtergraph", OFFSET(metadata), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
125			{ "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 },
126			{ "measure_perchannel", "Select the parameters which are measured per channel", OFFSET(measure_perchannel), AV_OPT_TYPE_FLAGS, {.i64=MEASURE_ALL}, 0, UINT_MAX, FLAGS, .unit = "measure" },
127			{ "none" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NONE }, 0, 0, FLAGS, .unit = "measure" },
128			{ "all" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ALL }, 0, 0, FLAGS, .unit = "measure" },
129			{ "Bit_depth" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_BIT_DEPTH }, 0, 0, FLAGS, .unit = "measure" },
130			{ "Crest_factor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_CREST_FACTOR }, 0, 0, FLAGS, .unit = "measure" },
131			{ "DC_offset" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_DC_OFFSET }, 0, 0, FLAGS, .unit = "measure" },
132			{ "Dynamic_range" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_DYNAMIC_RANGE }, 0, 0, FLAGS, .unit = "measure" },
133			{ "Entropy" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ENTROPY }, 0, 0, FLAGS, .unit = "measure" },
134			{ "Flat_factor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_FLAT_FACTOR }, 0, 0, FLAGS, .unit = "measure" },
135			{ "Max_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MAX_DIFFERENCE }, 0, 0, FLAGS, .unit = "measure" },
136			{ "Max_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MAX_LEVEL }, 0, 0, FLAGS, .unit = "measure" },
137			{ "Mean_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MEAN_DIFFERENCE }, 0, 0, FLAGS, .unit = "measure" },
138			{ "Min_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MIN_DIFFERENCE }, 0, 0, FLAGS, .unit = "measure" },
139			{ "Min_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_MIN_LEVEL }, 0, 0, FLAGS, .unit = "measure" },
140			{ "Noise_floor" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NOISE_FLOOR }, 0, 0, FLAGS, .unit = "measure" },
141			{ "Noise_floor_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NOISE_FLOOR_COUNT }, 0, 0, FLAGS, .unit = "measure" },
142			{ "Number_of_Infs" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_INFS }, 0, 0, FLAGS, .unit = "measure" },
143			{ "Number_of_NaNs" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_NANS }, 0, 0, FLAGS, .unit = "measure" },
144			{ "Number_of_denormals" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_DENORMALS }, 0, 0, FLAGS, .unit = "measure" },
145			{ "Number_of_samples" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_NUMBER_OF_SAMPLES }, 0, 0, FLAGS, .unit = "measure" },
146			{ "Peak_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_PEAK_COUNT }, 0, 0, FLAGS, .unit = "measure" },
147			{ "Peak_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_PEAK_LEVEL }, 0, 0, FLAGS, .unit = "measure" },
148			{ "RMS_difference" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_DIFFERENCE }, 0, 0, FLAGS, .unit = "measure" },
149			{ "RMS_level" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_LEVEL }, 0, 0, FLAGS, .unit = "measure" },
150			{ "RMS_peak" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_PEAK }, 0, 0, FLAGS, .unit = "measure" },
151			{ "RMS_trough" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_RMS_TROUGH }, 0, 0, FLAGS, .unit = "measure" },
152			{ "Zero_crossings" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS }, 0, 0, FLAGS, .unit = "measure" },
153			{ "Zero_crossings_rate" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ZERO_CROSSINGS_RATE }, 0, 0, FLAGS, .unit = "measure" },
154			{ "Abs_Peak_count" , "", 0, AV_OPT_TYPE_CONST, {.i64=MEASURE_ABS_PEAK_COUNT }, 0, 0, FLAGS, .unit = "measure" },
155			{ "measure_overall", "Select the parameters which are measured overall", OFFSET(measure_overall), AV_OPT_TYPE_FLAGS, {.i64=MEASURE_ALL}, 0, UINT_MAX, FLAGS, .unit = "measure" },
156			{ NULL }
157			};
158
159			AVFILTER_DEFINE_CLASS(astats);
160
161		✗	static void reset_stats(AudioStatsContext *s)
162			{
163			int c;
164
165		✗	for (c = 0; c < s->nb_channels; c++) {
166		✗	ChannelStats *p = &s->chstats[c];
167
168		✗	p->min = p->nmin = p->min_sigma_x2 = DBL_MAX;
169		✗	p->max = p->nmax = p->max_sigma_x2 =-DBL_MAX;
170		✗	p->abs_peak = 0;
171		✗	p->min_non_zero = DBL_MAX;
172		✗	p->min_diff = DBL_MAX;
173		✗	p->max_diff = 0;
174		✗	p->sigma_x = 0;
175		✗	p->sigma_x2 = 0;
176		✗	p->avg_sigma_x2 = 0;
177		✗	p->min_run = 0;
178		✗	p->max_run = 0;
179		✗	p->min_runs = 0;
180		✗	p->max_runs = 0;
181		✗	p->diff1_sum = 0;
182		✗	p->diff1_sum_x2 = 0;
183		✗	p->mask[0] = 0;
184		✗	p->mask[1] = 0;
185		✗	p->mask[2] =~0;
186		✗	p->mask[3] = 0;
187		✗	p->min_count = 0;
188		✗	p->max_count = 0;
189		✗	p->abs_peak_count = 0;
190		✗	p->zero_runs = 0;
191		✗	p->nb_samples = 0;
192		✗	p->nb_nans = 0;
193		✗	p->nb_infs = 0;
194		✗	p->nb_denormals = 0;
195		✗	p->last = NAN;
196		✗	p->noise_floor = NAN;
197		✗	p->noise_floor_count = 0;
198		✗	p->entropy = 0;
199		✗	p->win_pos = 0;
200		✗	p->sorted_front = 0;
201		✗	p->sorted_back = 0;
202		✗	memset(p->win_samples, 0, s->tc_samples * sizeof(*p->win_samples));
203		✗	memset(p->ehistogram, 0, sizeof(p->ehistogram));
204		✗	for (int n = 0; n < s->tc_samples; n++)
205		✗	p->sorted_samples[n] = -1.0;
206			}
207		✗	}
208
209		✗	static int config_output(AVFilterLink *outlink)
210			{
211		✗	AudioStatsContext *s = outlink->src->priv;
212
213		✗	s->chstats = av_calloc(sizeof(*s->chstats), outlink->ch_layout.nb_channels);
214		✗	if (!s->chstats)
215		✗	return AVERROR(ENOMEM);
216
217		✗	s->tc_samples = FFMAX(s->time_constant * outlink->sample_rate + .5, 1);
218		✗	s->nb_channels = outlink->ch_layout.nb_channels;
219
220		✗	for (int i = 0; i < s->nb_channels; i++) {
221		✗	ChannelStats *p = &s->chstats[i];
222
223		✗	p->win_samples = av_calloc(s->tc_samples, sizeof(*p->win_samples));
224		✗	if (!p->win_samples)
225		✗	return AVERROR(ENOMEM);
226
227		✗	p->sorted_samples = av_calloc(s->tc_samples, sizeof(*p->sorted_samples));
228		✗	if (!p->sorted_samples)
229		✗	return AVERROR(ENOMEM);
230			}
231
232		✗	s->mult = exp((-1 / s->time_constant / outlink->sample_rate));
233		✗	s->nb_frames = 0;
234		✗	s->maxbitdepth = av_get_bytes_per_sample(outlink->format) * 8;
235		✗	s->is_double = outlink->format == AV_SAMPLE_FMT_DBL ||
236		✗	outlink->format == AV_SAMPLE_FMT_DBLP;
237
238		✗	s->is_float = outlink->format == AV_SAMPLE_FMT_FLT ||
239		✗	outlink->format == AV_SAMPLE_FMT_FLTP;
240
241		✗	reset_stats(s);
242
243		✗	return 0;
244			}
245
246		✗	static void bit_depth(AudioStatsContext *s, const uint64_t *const mask, uint8_t *depth)
247			{
248		✗	unsigned result = s->maxbitdepth;
249		✗	uint64_t amask = mask[1] & (~mask[2]);
250
251		✗	depth[0] = 0;
252		✗	for (int i = 0; i < result; i++)
253		✗	depth[0] += !!(mask[0] & (1ULL << i));
254
255		✗	depth[1] = 0;
256		✗	for (int i = 0; i < result; i++)
257		✗	depth[1] += !!(mask[1] & (1ULL << i));
258
259		✗	depth[2] = result;
260		✗	for (int i = 0; i < result && !(amask & 1); i++) {
261		✗	depth[2]--;
262		✗	amask >>= 1;
263			}
264
265		✗	depth[3] = 0;
266		✗	for (int i = 0; i < result; i++)
267		✗	depth[3] += !!(mask[3] & (1ULL << i));
268		✗	}
269
270		✗	static double calc_entropy(AudioStatsContext *s, ChannelStats *p)
271			{
272		✗	double entropy = 0.;
273
274		✗	for (int i = 0; i < HISTOGRAM_SIZE; i++) {
275		✗	double entry = p->ehistogram[i] / ((double)p->nb_samples);
276
277		✗	if (entry > 1e-8)
278		✗	entropy += entry * log2(entry);
279			}
280
281		✗	return -entropy / log2(HISTOGRAM_SIZE);
282			}
283
284		✗	static double calc_noise_floor(double *ss, double x, double px,
285			int n, int *ffront, int *bback)
286			{
287		✗	double r, ax = fabs(x);
288		✗	int front = *ffront;
289		✗	int back = *bback;
290		✗	int empty = front == back && ss[front] == -1.0;
291
292		✗	if (!empty && fabs(px) == ss[front]) {
293		✗	ss[front] = -1.0;
294		✗	if (back != front) {
295		✗	front--;
296		✗	if (front < 0)
297		✗	front = n - 1;
298			}
299		✗	empty = front == back;
300			}
301
302		✗	if (!empty && ax >= ss[front]) {
303			while (1) {
304		✗	ss[front] = -1.0;
305		✗	if (back == front) {
306		✗	empty = 1;
307		✗	break;
308			}
309		✗	front--;
310		✗	if (front < 0)
311		✗	front = n - 1;
312			}
313			}
314
315		✗	while (!empty && ax >= ss[back]) {
316		✗	ss[back] = -1.0;
317		✗	if (back == front) {
318		✗	empty = 1;
319		✗	break;
320			}
321		✗	back++;
322		✗	if (back >= n)
323		✗	back = 0;
324			}
325
326		✗	if (!empty) {
327		✗	back--;
328		✗	if (back < 0)
329		✗	back = n - 1;
330			}
331
332		✗	ss[back] = ax;
333		✗	r = ss[front];
334
335		✗	*ffront = front;
336		✗	*bback = back;
337
338		✗	return r;
339			}
340
341		✗	static inline void update_minmax(AudioStatsContext *s, ChannelStats *p, double d)
342			{
343		✗	if (d < p->min)
344		✗	p->min = d;
345		✗	if (d > p->max)
346		✗	p->max = d;
347		✗	}
348
349		✗	static inline void update_stat(AudioStatsContext *s, ChannelStats *p, double d, double nd, int64_t i)
350			{
351		✗	double abs_d = FFABS(d);
352			double drop, noise_floor;
353			int index;
354
355		✗	if (p->abs_peak < abs_d) {
356		✗	p->abs_peak = abs_d;
357		✗	p->abs_peak_count = 1;
358		✗	} else if (p->abs_peak == abs_d) {
359		✗	p->abs_peak_count++;
360			}
361		✗	if (d < p->min) {
362		✗	p->min = d;
363		✗	p->nmin = nd;
364		✗	p->min_run = 1;
365		✗	p->min_runs = 0;
366		✗	p->min_count = 1;
367		✗	} else if (d == p->min) {
368		✗	p->min_count++;
369		✗	p->min_run = d == p->last ? p->min_run + 1 : 1;
370		✗	} else if (p->last == p->min) {
371		✗	p->min_runs += p->min_run * p->min_run;
372			}
373
374		✗	if (d != 0 && FFABS(d) < p->min_non_zero)
375		✗	p->min_non_zero = FFABS(d);
376
377		✗	if (d > p->max) {
378		✗	p->max = d;
379		✗	p->nmax = nd;
380		✗	p->max_run = 1;
381		✗	p->max_runs = 0;
382		✗	p->max_count = 1;
383		✗	} else if (d == p->max) {
384		✗	p->max_count++;
385		✗	p->max_run = d == p->last ? p->max_run + 1 : 1;
386		✗	} else if (p->last == p->max) {
387		✗	p->max_runs += p->max_run * p->max_run;
388			}
389
390		✗	if (d != 0) {
391		✗	p->zero_runs += FFSIGN(d) != FFSIGN(p->last_non_zero);
392		✗	p->last_non_zero = d;
393			}
394
395		✗	p->sigma_x += nd;
396		✗	p->sigma_x2 += nd * nd;
397		✗	p->avg_sigma_x2 = p->avg_sigma_x2 * s->mult + (1.0 - s->mult) * nd * nd;
398		✗	if (!isnan(p->last)) {
399		✗	p->min_diff = FFMIN(p->min_diff, fabs(d - p->last));
400		✗	p->max_diff = FFMAX(p->max_diff, fabs(d - p->last));
401		✗	p->diff1_sum += fabs(d - p->last);
402		✗	p->diff1_sum_x2 += (d - p->last) * (d - p->last);
403			}
404		✗	p->mask[0] |= (i < 0) ? -i : i;
405		✗	p->mask[1] |= i;
406		✗	p->mask[2] &= i;
407		✗	if (!isnan(p->last))
408		✗	p->mask[3] |= i ^ p->lasti;
409		✗	p->lasti = i;
410		✗	p->last = d;
411
412		✗	drop = p->win_samples[p->win_pos];
413		✗	p->win_samples[p->win_pos] = nd;
414		✗	index = av_clip(lrint(av_clipd(FFABS(nd), 0.0, 1.0) * HISTOGRAM_MAX), 0, HISTOGRAM_MAX);
415		✗	p->max_index = FFMAX(p->max_index, index);
416		✗	p->ehistogram[index]++;
417		✗	p->win_pos++;
418
419		✗	if (p->win_pos >= s->tc_samples)
420		✗	p->win_pos = 0;
421
422		✗	if (p->nb_samples >= s->tc_samples) {
423		✗	p->max_sigma_x2 = FFMAX(p->max_sigma_x2, p->avg_sigma_x2);
424		✗	p->min_sigma_x2 = FFMIN(p->min_sigma_x2, p->avg_sigma_x2);
425			}
426		✗	p->nb_samples++;
427
428		✗	noise_floor = calc_noise_floor(p->sorted_samples, nd, drop,
429		✗	s->tc_samples, &p->sorted_front, &p->sorted_back);
430		✗	if (p->nb_samples >= s->tc_samples) {
431		✗	if (isnan(p->noise_floor)) {
432		✗	p->noise_floor = noise_floor;
433		✗	p->noise_floor_count = 1;
434			} else {
435		✗	if (noise_floor < p->noise_floor) {
436		✗	p->noise_floor = noise_floor;
437		✗	p->noise_floor_count = 1;
438		✗	} else if (noise_floor == p->noise_floor) {
439		✗	p->noise_floor_count++;
440			}
441			}
442			}
443		✗	}
444
445		✗	static inline void update_float_stat(AudioStatsContext *s, ChannelStats *p, float d)
446			{
447		✗	int type = fpclassify(d);
448
449		✗	p->nb_nans += type == FP_NAN;
450		✗	p->nb_infs += type == FP_INFINITE;
451		✗	p->nb_denormals += type == FP_SUBNORMAL;
452		✗	}
453
454		✗	static inline void update_double_stat(AudioStatsContext *s, ChannelStats *p, double d)
455			{
456		✗	int type = fpclassify(d);
457
458		✗	p->nb_nans += type == FP_NAN;
459		✗	p->nb_infs += type == FP_INFINITE;
460		✗	p->nb_denormals += type == FP_SUBNORMAL;
461		✗	}
462
463		✗	static void set_meta(AVDictionary **metadata, int chan, const char *key,
464			const char *fmt, double val)
465			{
466			uint8_t value[128];
467			uint8_t key2[128];
468
469		✗	snprintf(value, sizeof(value), fmt, val);
470		✗	if (chan)
471		✗	snprintf(key2, sizeof(key2), "lavfi.astats.%d.%s", chan, key);
472			else
473		✗	snprintf(key2, sizeof(key2), "lavfi.astats.%s", key);
474		✗	av_dict_set(metadata, key2, value, 0);
475		✗	}
476
477			#define LINEAR_TO_DB(x) (log10(x) * 20)
478
479		✗	static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
480			{
481		✗	uint64_t mask[4], min_count = 0, max_count = 0, nb_samples = 0, noise_floor_count = 0;
482		✗	uint64_t nb_nans = 0, nb_infs = 0, nb_denormals = 0;
483		✗	uint64_t abs_peak_count = 0;
484		✗	double min_runs = 0, max_runs = 0,
485		✗	min = DBL_MAX, max =-DBL_MAX, min_diff = DBL_MAX, max_diff = 0,
486		✗	nmin = DBL_MAX, nmax =-DBL_MAX,
487		✗	max_sigma_x = 0,
488		✗	diff1_sum = 0,
489		✗	diff1_sum_x2 = 0,
490		✗	sigma_x2 = 0,
491		✗	noise_floor = 0,
492		✗	entropy = 0,
493		✗	min_sigma_x2 = DBL_MAX,
494		✗	max_sigma_x2 =-DBL_MAX;
495			uint8_t depth[4];
496			int c;
497
498		✗	mask[0] = 0;
499		✗	mask[1] = 0;
500		✗	mask[2] =~0;
501		✗	mask[3] = 0;
502
503		✗	for (c = 0; c < s->nb_channels; c++) {
504		✗	ChannelStats *p = &s->chstats[c];
505
506		✗	if (p->nb_samples < s->tc_samples)
507		✗	p->min_sigma_x2 = p->max_sigma_x2 = p->sigma_x2 / p->nb_samples;
508
509		✗	min = FFMIN(min, p->min);
510		✗	max = FFMAX(max, p->max);
511		✗	nmin = FFMIN(nmin, p->nmin);
512		✗	nmax = FFMAX(nmax, p->nmax);
513		✗	min_diff = FFMIN(min_diff, p->min_diff);
514		✗	max_diff = FFMAX(max_diff, p->max_diff);
515		✗	diff1_sum += p->diff1_sum;
516		✗	diff1_sum_x2 += p->diff1_sum_x2;
517		✗	min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
518		✗	max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
519		✗	sigma_x2 += p->sigma_x2;
520		✗	noise_floor = FFMAX(noise_floor, p->noise_floor);
521		✗	noise_floor_count += p->noise_floor_count;
522		✗	p->entropy = calc_entropy(s, p);
523		✗	entropy += p->entropy;
524		✗	min_count += p->min_count;
525		✗	max_count += p->max_count;
526		✗	abs_peak_count += p->abs_peak_count;
527		✗	min_runs += p->min_runs;
528		✗	max_runs += p->max_runs;
529		✗	mask[0] |= p->mask[0];
530		✗	mask[1] |= p->mask[1];
531		✗	mask[2] &= p->mask[2];
532		✗	mask[3] |= p->mask[3];
533		✗	nb_samples += p->nb_samples;
534		✗	nb_nans += p->nb_nans;
535		✗	nb_infs += p->nb_infs;
536		✗	nb_denormals += p->nb_denormals;
537		✗	if (fabs(p->sigma_x) > fabs(max_sigma_x))
538		✗	max_sigma_x = p->sigma_x;
539
540		✗	if (s->measure_perchannel & MEASURE_DC_OFFSET)
541		✗	set_meta(metadata, c + 1, "DC_offset", "%f", p->sigma_x / p->nb_samples);
542		✗	if (s->measure_perchannel & MEASURE_MIN_LEVEL)
543		✗	set_meta(metadata, c + 1, "Min_level", "%f", p->min);
544		✗	if (s->measure_perchannel & MEASURE_MAX_LEVEL)
545		✗	set_meta(metadata, c + 1, "Max_level", "%f", p->max);
546		✗	if (s->measure_perchannel & MEASURE_MIN_DIFFERENCE)
547		✗	set_meta(metadata, c + 1, "Min_difference", "%f", p->min_diff);
548		✗	if (s->measure_perchannel & MEASURE_MAX_DIFFERENCE)
549		✗	set_meta(metadata, c + 1, "Max_difference", "%f", p->max_diff);
550		✗	if (s->measure_perchannel & MEASURE_MEAN_DIFFERENCE)
551		✗	set_meta(metadata, c + 1, "Mean_difference", "%f", p->diff1_sum / (p->nb_samples - 1));
552		✗	if (s->measure_perchannel & MEASURE_RMS_DIFFERENCE)
553		✗	set_meta(metadata, c + 1, "RMS_difference", "%f", sqrt(p->diff1_sum_x2 / (p->nb_samples - 1)));
554		✗	if (s->measure_perchannel & MEASURE_PEAK_LEVEL)
555		✗	set_meta(metadata, c + 1, "Peak_level", "%f", LINEAR_TO_DB(FFMAX(-p->nmin, p->nmax)));
556		✗	if (s->measure_perchannel & MEASURE_RMS_LEVEL)
557		✗	set_meta(metadata, c + 1, "RMS_level", "%f", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
558		✗	if (s->measure_perchannel & MEASURE_RMS_PEAK)
559		✗	set_meta(metadata, c + 1, "RMS_peak", "%f", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
560		✗	if (s->measure_perchannel & MEASURE_RMS_TROUGH)
561		✗	set_meta(metadata, c + 1, "RMS_trough", "%f", LINEAR_TO_DB(sqrt(p->min_sigma_x2)));
562		✗	if (s->measure_perchannel & MEASURE_CREST_FACTOR)
563		✗	set_meta(metadata, c + 1, "Crest_factor", "%f", p->sigma_x2 ? FFMAX(-p->min, p->max) / sqrt(p->sigma_x2 / p->nb_samples) : 1);
564		✗	if (s->measure_perchannel & MEASURE_FLAT_FACTOR)
565		✗	set_meta(metadata, c + 1, "Flat_factor", "%f", LINEAR_TO_DB((p->min_runs + p->max_runs) / (p->min_count + p->max_count)));
566		✗	if (s->measure_perchannel & MEASURE_PEAK_COUNT)
567		✗	set_meta(metadata, c + 1, "Peak_count", "%f", (float)(p->min_count + p->max_count));
568		✗	if (s->measure_perchannel & MEASURE_ABS_PEAK_COUNT)
569		✗	set_meta(metadata, c + 1, "Peak_count", "%f", p->abs_peak_count);
570		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR)
571		✗	set_meta(metadata, c + 1, "Noise_floor", "%f", LINEAR_TO_DB(p->noise_floor));
572		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR_COUNT)
573		✗	set_meta(metadata, c + 1, "Noise_floor_count", "%f", p->noise_floor_count);
574		✗	if (s->measure_perchannel & MEASURE_ENTROPY)
575		✗	set_meta(metadata, c + 1, "Entropy", "%f", p->entropy);
576		✗	if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
577		✗	bit_depth(s, p->mask, depth);
578		✗	set_meta(metadata, c + 1, "Bit_depth", "%f", depth[0]);
579		✗	set_meta(metadata, c + 1, "Bit_depth2", "%f", depth[1]);
580		✗	set_meta(metadata, c + 1, "Bit_depth3", "%f", depth[2]);
581		✗	set_meta(metadata, c + 1, "Bit_depth4", "%f", depth[3]);
582			}
583		✗	if (s->measure_perchannel & MEASURE_DYNAMIC_RANGE)
584		✗	set_meta(metadata, c + 1, "Dynamic_range", "%f", LINEAR_TO_DB(2 * FFMAX(FFABS(p->min), FFABS(p->max))/ p->min_non_zero));
585		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS)
586		✗	set_meta(metadata, c + 1, "Zero_crossings", "%f", p->zero_runs);
587		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS_RATE)
588		✗	set_meta(metadata, c + 1, "Zero_crossings_rate", "%f", p->zero_runs/(double)p->nb_samples);
589		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_NANS)
590		✗	set_meta(metadata, c + 1, "Number of NaNs", "%f", p->nb_nans);
591		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_INFS)
592		✗	set_meta(metadata, c + 1, "Number of Infs", "%f", p->nb_infs);
593		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_DENORMALS)
594		✗	set_meta(metadata, c + 1, "Number of denormals", "%f", p->nb_denormals);
595			}
596
597		✗	if (s->measure_overall & MEASURE_DC_OFFSET)
598		✗	set_meta(metadata, 0, "Overall.DC_offset", "%f", max_sigma_x / (nb_samples / s->nb_channels));
599		✗	if (s->measure_overall & MEASURE_MIN_LEVEL)
600		✗	set_meta(metadata, 0, "Overall.Min_level", "%f", min);
601		✗	if (s->measure_overall & MEASURE_MAX_LEVEL)
602		✗	set_meta(metadata, 0, "Overall.Max_level", "%f", max);
603		✗	if (s->measure_overall & MEASURE_MIN_DIFFERENCE)
604		✗	set_meta(metadata, 0, "Overall.Min_difference", "%f", min_diff);
605		✗	if (s->measure_overall & MEASURE_MAX_DIFFERENCE)
606		✗	set_meta(metadata, 0, "Overall.Max_difference", "%f", max_diff);
607		✗	if (s->measure_overall & MEASURE_MEAN_DIFFERENCE)
608		✗	set_meta(metadata, 0, "Overall.Mean_difference", "%f", diff1_sum / (nb_samples - s->nb_channels));
609		✗	if (s->measure_overall & MEASURE_RMS_DIFFERENCE)
610		✗	set_meta(metadata, 0, "Overall.RMS_difference", "%f", sqrt(diff1_sum_x2 / (nb_samples - s->nb_channels)));
611		✗	if (s->measure_overall & MEASURE_PEAK_LEVEL)
612		✗	set_meta(metadata, 0, "Overall.Peak_level", "%f", LINEAR_TO_DB(FFMAX(-nmin, nmax)));
613		✗	if (s->measure_overall & MEASURE_RMS_LEVEL)
614		✗	set_meta(metadata, 0, "Overall.RMS_level", "%f", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
615		✗	if (s->measure_overall & MEASURE_RMS_PEAK)
616		✗	set_meta(metadata, 0, "Overall.RMS_peak", "%f", LINEAR_TO_DB(sqrt(max_sigma_x2)));
617		✗	if (s->measure_overall & MEASURE_RMS_TROUGH)
618		✗	set_meta(metadata, 0, "Overall.RMS_trough", "%f", LINEAR_TO_DB(sqrt(min_sigma_x2)));
619		✗	if (s->measure_overall & MEASURE_FLAT_FACTOR)
620		✗	set_meta(metadata, 0, "Overall.Flat_factor", "%f", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
621		✗	if (s->measure_overall & MEASURE_PEAK_COUNT)
622		✗	set_meta(metadata, 0, "Overall.Peak_count", "%f", (float)(min_count + max_count) / (double)s->nb_channels);
623		✗	if (s->measure_overall & MEASURE_ABS_PEAK_COUNT)
624		✗	set_meta(metadata, 0, "Overall.Abs_Peak_count", "%f", (float)(abs_peak_count) / (double)s->nb_channels);
625		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR)
626		✗	set_meta(metadata, 0, "Overall.Noise_floor", "%f", LINEAR_TO_DB(noise_floor));
627		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR_COUNT)
628		✗	set_meta(metadata, 0, "Overall.Noise_floor_count", "%f", noise_floor_count / (double)s->nb_channels);
629		✗	if (s->measure_overall & MEASURE_ENTROPY)
630		✗	set_meta(metadata, 0, "Overall.Entropy", "%f", entropy / (double)s->nb_channels);
631		✗	if (s->measure_overall & MEASURE_BIT_DEPTH) {
632		✗	bit_depth(s, mask, depth);
633		✗	set_meta(metadata, 0, "Overall.Bit_depth", "%f", depth[0]);
634		✗	set_meta(metadata, 0, "Overall.Bit_depth2", "%f", depth[1]);
635		✗	set_meta(metadata, 0, "Overall.Bit_depth3", "%f", depth[2]);
636		✗	set_meta(metadata, 0, "Overall.Bit_depth4", "%f", depth[3]);
637			}
638		✗	if (s->measure_overall & MEASURE_NUMBER_OF_SAMPLES)
639		✗	set_meta(metadata, 0, "Overall.Number_of_samples", "%f", nb_samples / s->nb_channels);
640		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_NANS)
641		✗	set_meta(metadata, 0, "Number of NaNs", "%f", nb_nans / (float)s->nb_channels);
642		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_INFS)
643		✗	set_meta(metadata, 0, "Number of Infs", "%f", nb_infs / (float)s->nb_channels);
644		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_DENORMALS)
645		✗	set_meta(metadata, 0, "Number of denormals", "%f", nb_denormals / (float)s->nb_channels);
646		✗	}
647
648			#define UPDATE_STATS_P(type, update_func, update_float, channel_func) \
649			for (int c = start; c < end; c++) { \
650			ChannelStats *p = &s->chstats[c]; \
651			const type *src = (const type *)data[c]; \
652			const type * const srcend = src + samples; \
653			for (; src < srcend; src++) { \
654			update_func; \
655			update_float; \
656			} \
657			channel_func; \
658			}
659
660			#define UPDATE_STATS_I(type, update_func, update_float, channel_func) \
661			for (int c = start; c < end; c++) { \
662			ChannelStats *p = &s->chstats[c]; \
663			const type *src = (const type *)data[0]; \
664			const type * const srcend = src + samples * channels; \
665			for (src += c; src < srcend; src += channels) { \
666			update_func; \
667			update_float; \
668			} \
669			channel_func; \
670			}
671
672			#define UPDATE_STATS(planar, type, sample, normalizer_suffix, int_sample) \
673			if ((s->measure_overall | s->measure_perchannel) & ~MEASURE_MINMAXPEAK) { \
674			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, ); \
675			} else { \
676			UPDATE_STATS_##planar(type, update_minmax(s, p, sample), , p->nmin = p->min normalizer_suffix; p->nmax = p->max normalizer_suffix;); \
677			}
678
679		✗	static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
680			{
681		✗	AudioStatsContext *s = ctx->priv;
682		✗	AVFilterLink *inlink = ctx->inputs[0];
683		✗	AVFrame *buf = arg;
684		✗	const uint8_t * const * const data = (const uint8_t * const *)buf->extended_data;
685		✗	const int channels = s->nb_channels;
686		✗	const int samples = buf->nb_samples;
687		✗	const int start = (buf->ch_layout.nb_channels * jobnr) / nb_jobs;
688		✗	const int end = (buf->ch_layout.nb_channels * (jobnr+1)) / nb_jobs;
689
690		✗	switch (inlink->format) {
691		✗	case AV_SAMPLE_FMT_DBLP:
692		✗	UPDATE_STATS(P, double, *src, , llrint(*src * (UINT64_C(1) << 63)));
693		✗	break;
694		✗	case AV_SAMPLE_FMT_DBL:
695		✗	UPDATE_STATS(I, double, *src, , llrint(*src * (UINT64_C(1) << 63)));
696		✗	break;
697		✗	case AV_SAMPLE_FMT_FLTP:
698		✗	UPDATE_STATS(P, float, *src, , llrint(*src * (UINT64_C(1) << 31)));
699		✗	break;
700		✗	case AV_SAMPLE_FMT_FLT:
701		✗	UPDATE_STATS(I, float, *src, , llrint(*src * (UINT64_C(1) << 31)));
702		✗	break;
703		✗	case AV_SAMPLE_FMT_S64P:
704		✗	UPDATE_STATS(P, int64_t, *src, / (double)INT64_MAX, *src);
705		✗	break;
706		✗	case AV_SAMPLE_FMT_S64:
707		✗	UPDATE_STATS(I, int64_t, *src, / (double)INT64_MAX, *src);
708		✗	break;
709		✗	case AV_SAMPLE_FMT_S32P:
710		✗	UPDATE_STATS(P, int32_t, *src, / (double)INT32_MAX, *src);
711		✗	break;
712		✗	case AV_SAMPLE_FMT_S32:
713		✗	UPDATE_STATS(I, int32_t, *src, / (double)INT32_MAX, *src);
714		✗	break;
715		✗	case AV_SAMPLE_FMT_S16P:
716		✗	UPDATE_STATS(P, int16_t, *src, / (double)INT16_MAX, *src);
717		✗	break;
718		✗	case AV_SAMPLE_FMT_S16:
719		✗	UPDATE_STATS(I, int16_t, *src, / (double)INT16_MAX, *src);
720		✗	break;
721			}
722
723		✗	return 0;
724			}
725
726		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
727			{
728		✗	AVFilterContext *ctx = inlink->dst;
729		✗	AudioStatsContext *s = ctx->priv;
730		✗	AVDictionary **metadata = &buf->metadata;
731
732		✗	if (s->reset_count > 0) {
733		✗	if (s->nb_frames >= s->reset_count) {
734		✗	reset_stats(s);
735		✗	s->nb_frames = 0;
736			}
737		✗	s->nb_frames++;
738			}
739
740		✗	if (s->used == 0)
741		✗	s->used = buf->nb_samples > 0;
742		✗	ff_filter_execute(ctx, filter_channel, buf, NULL,
743		✗	FFMIN(inlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx)));
744
745		✗	if (s->metadata)
746		✗	set_metadata(s, metadata);
747
748		✗	return ff_filter_frame(inlink->dst->outputs[0], buf);
749			}
750
751		✗	static void print_stats(AVFilterContext *ctx)
752			{
753		✗	AudioStatsContext *s = ctx->priv;
754		✗	uint64_t mask[4], min_count = 0, max_count = 0, nb_samples = 0, noise_floor_count = 0;
755		✗	uint64_t nb_nans = 0, nb_infs = 0, nb_denormals = 0, abs_peak_count = 0;
756		✗	double min_runs = 0, max_runs = 0,
757		✗	min = DBL_MAX, max =-DBL_MAX, min_diff = DBL_MAX, max_diff = 0,
758		✗	nmin = DBL_MAX, nmax =-DBL_MAX,
759		✗	max_sigma_x = 0,
760		✗	diff1_sum_x2 = 0,
761		✗	diff1_sum = 0,
762		✗	sigma_x2 = 0,
763		✗	noise_floor = 0,
764		✗	entropy = 0,
765		✗	min_sigma_x2 = DBL_MAX,
766		✗	max_sigma_x2 =-DBL_MAX;
767			uint8_t depth[4];
768			int c;
769
770		✗	mask[0] = 0;
771		✗	mask[1] = 0;
772		✗	mask[2] =~0;
773		✗	mask[3] = 0;
774
775		✗	for (c = 0; c < s->nb_channels; c++) {
776		✗	ChannelStats *p = &s->chstats[c];
777
778		✗	if (p->nb_samples == 0 && !s->used)
779		✗	continue;
780
781		✗	if (p->nb_samples < s->tc_samples)
782		✗	p->min_sigma_x2 = p->max_sigma_x2 = p->sigma_x2 / p->nb_samples;
783
784		✗	min = FFMIN(min, p->min);
785		✗	max = FFMAX(max, p->max);
786		✗	nmin = FFMIN(nmin, p->nmin);
787		✗	nmax = FFMAX(nmax, p->nmax);
788		✗	min_diff = FFMIN(min_diff, p->min_diff);
789		✗	max_diff = FFMAX(max_diff, p->max_diff);
790		✗	diff1_sum_x2 += p->diff1_sum_x2;
791		✗	diff1_sum += p->diff1_sum;
792		✗	min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
793		✗	max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
794		✗	sigma_x2 += p->sigma_x2;
795		✗	noise_floor = FFMAX(noise_floor, p->noise_floor);
796		✗	p->entropy = calc_entropy(s, p);
797		✗	entropy += p->entropy;
798		✗	min_count += p->min_count;
799		✗	max_count += p->max_count;
800		✗	abs_peak_count += p->abs_peak_count;
801		✗	noise_floor_count += p->noise_floor_count;
802		✗	min_runs += p->min_runs;
803		✗	max_runs += p->max_runs;
804		✗	mask[0] |= p->mask[0];
805		✗	mask[1] |= p->mask[1];
806		✗	mask[2] &= p->mask[2];
807		✗	mask[3] |= p->mask[3];
808		✗	nb_samples += p->nb_samples;
809		✗	nb_nans += p->nb_nans;
810		✗	nb_infs += p->nb_infs;
811		✗	nb_denormals += p->nb_denormals;
812		✗	if (fabs(p->sigma_x) > fabs(max_sigma_x))
813		✗	max_sigma_x = p->sigma_x;
814
815		✗	if (s->measure_perchannel != MEASURE_NONE)
816		✗	av_log(ctx, AV_LOG_INFO, "Channel: %d\n", c + 1);
817		✗	if (s->measure_perchannel & MEASURE_DC_OFFSET)
818		✗	av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", p->sigma_x / p->nb_samples);
819		✗	if (s->measure_perchannel & MEASURE_MIN_LEVEL)
820		✗	av_log(ctx, AV_LOG_INFO, "Min level: %f\n", p->min);
821		✗	if (s->measure_perchannel & MEASURE_MAX_LEVEL)
822		✗	av_log(ctx, AV_LOG_INFO, "Max level: %f\n", p->max);
823		✗	if (s->measure_perchannel & MEASURE_MIN_DIFFERENCE)
824		✗	av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", p->min_diff);
825		✗	if (s->measure_perchannel & MEASURE_MAX_DIFFERENCE)
826		✗	av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", p->max_diff);
827		✗	if (s->measure_perchannel & MEASURE_MEAN_DIFFERENCE)
828		✗	av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", p->diff1_sum / (p->nb_samples - 1));
829		✗	if (s->measure_perchannel & MEASURE_RMS_DIFFERENCE)
830		✗	av_log(ctx, AV_LOG_INFO, "RMS difference: %f\n", sqrt(p->diff1_sum_x2 / (p->nb_samples - 1)));
831		✗	if (s->measure_perchannel & MEASURE_PEAK_LEVEL)
832		✗	av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-p->nmin, p->nmax)));
833		✗	if (s->measure_perchannel & MEASURE_RMS_LEVEL)
834		✗	av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(p->sigma_x2 / p->nb_samples)));
835		✗	if (s->measure_perchannel & MEASURE_RMS_PEAK)
836		✗	av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(p->max_sigma_x2)));
837		✗	if (s->measure_perchannel & MEASURE_RMS_TROUGH)
838		✗	if (p->min_sigma_x2 != 1)
839		✗	av_log(ctx, AV_LOG_INFO, "RMS trough dB: %f\n",LINEAR_TO_DB(sqrt(p->min_sigma_x2)));
840		✗	if (s->measure_perchannel & MEASURE_CREST_FACTOR)
841		✗	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);
842		✗	if (s->measure_perchannel & MEASURE_FLAT_FACTOR)
843		✗	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)));
844		✗	if (s->measure_perchannel & MEASURE_PEAK_COUNT)
845		✗	av_log(ctx, AV_LOG_INFO, "Peak count: %"PRId64"\n", p->min_count + p->max_count);
846		✗	if (s->measure_perchannel & MEASURE_ABS_PEAK_COUNT)
847		✗	av_log(ctx, AV_LOG_INFO, "Abs Peak count: %"PRId64"\n", p->abs_peak_count);
848		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR)
849		✗	av_log(ctx, AV_LOG_INFO, "Noise floor dB: %f\n", LINEAR_TO_DB(p->noise_floor));
850		✗	if (s->measure_perchannel & MEASURE_NOISE_FLOOR_COUNT)
851		✗	av_log(ctx, AV_LOG_INFO, "Noise floor count: %"PRId64"\n", p->noise_floor_count);
852		✗	if (s->measure_perchannel & MEASURE_ENTROPY)
853		✗	av_log(ctx, AV_LOG_INFO, "Entropy: %f\n", p->entropy);
854		✗	if (s->measure_perchannel & MEASURE_BIT_DEPTH) {
855		✗	bit_depth(s, p->mask, depth);
856		✗	av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u/%u/%u\n", depth[0], depth[1], depth[2], depth[3]);
857			}
858		✗	if (s->measure_perchannel & MEASURE_DYNAMIC_RANGE)
859		✗	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));
860		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS)
861		✗	av_log(ctx, AV_LOG_INFO, "Zero crossings: %"PRId64"\n", p->zero_runs);
862		✗	if (s->measure_perchannel & MEASURE_ZERO_CROSSINGS_RATE)
863		✗	av_log(ctx, AV_LOG_INFO, "Zero crossings rate: %f\n", p->zero_runs/(double)p->nb_samples);
864		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_NANS)
865		✗	av_log(ctx, AV_LOG_INFO, "Number of NaNs: %"PRId64"\n", p->nb_nans);
866		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_INFS)
867		✗	av_log(ctx, AV_LOG_INFO, "Number of Infs: %"PRId64"\n", p->nb_infs);
868		✗	if ((s->is_float || s->is_double) && s->measure_perchannel & MEASURE_NUMBER_OF_DENORMALS)
869		✗	av_log(ctx, AV_LOG_INFO, "Number of denormals: %"PRId64"\n", p->nb_denormals);
870			}
871
872		✗	if (nb_samples == 0 && !s->used)
873		✗	return;
874
875		✗	if (s->measure_overall != MEASURE_NONE)
876		✗	av_log(ctx, AV_LOG_INFO, "Overall\n");
877		✗	if (s->measure_overall & MEASURE_DC_OFFSET)
878		✗	av_log(ctx, AV_LOG_INFO, "DC offset: %f\n", max_sigma_x / (nb_samples / s->nb_channels));
879		✗	if (s->measure_overall & MEASURE_MIN_LEVEL)
880		✗	av_log(ctx, AV_LOG_INFO, "Min level: %f\n", min);
881		✗	if (s->measure_overall & MEASURE_MAX_LEVEL)
882		✗	av_log(ctx, AV_LOG_INFO, "Max level: %f\n", max);
883		✗	if (s->measure_overall & MEASURE_MIN_DIFFERENCE)
884		✗	av_log(ctx, AV_LOG_INFO, "Min difference: %f\n", min_diff);
885		✗	if (s->measure_overall & MEASURE_MAX_DIFFERENCE)
886		✗	av_log(ctx, AV_LOG_INFO, "Max difference: %f\n", max_diff);
887		✗	if (s->measure_overall & MEASURE_MEAN_DIFFERENCE)
888		✗	av_log(ctx, AV_LOG_INFO, "Mean difference: %f\n", diff1_sum / (nb_samples - s->nb_channels));
889		✗	if (s->measure_overall & MEASURE_RMS_DIFFERENCE)
890		✗	av_log(ctx, AV_LOG_INFO, "RMS difference: %f\n", sqrt(diff1_sum_x2 / (nb_samples - s->nb_channels)));
891		✗	if (s->measure_overall & MEASURE_PEAK_LEVEL)
892		✗	av_log(ctx, AV_LOG_INFO, "Peak level dB: %f\n", LINEAR_TO_DB(FFMAX(-nmin, nmax)));
893		✗	if (s->measure_overall & MEASURE_RMS_LEVEL)
894		✗	av_log(ctx, AV_LOG_INFO, "RMS level dB: %f\n", LINEAR_TO_DB(sqrt(sigma_x2 / nb_samples)));
895		✗	if (s->measure_overall & MEASURE_RMS_PEAK)
896		✗	av_log(ctx, AV_LOG_INFO, "RMS peak dB: %f\n", LINEAR_TO_DB(sqrt(max_sigma_x2)));
897		✗	if (s->measure_overall & MEASURE_RMS_TROUGH)
898		✗	if (min_sigma_x2 != 1)
899		✗	av_log(ctx, AV_LOG_INFO, "RMS trough dB: %f\n", LINEAR_TO_DB(sqrt(min_sigma_x2)));
900		✗	if (s->measure_overall & MEASURE_FLAT_FACTOR)
901		✗	av_log(ctx, AV_LOG_INFO, "Flat factor: %f\n", LINEAR_TO_DB((min_runs + max_runs) / (min_count + max_count)));
902		✗	if (s->measure_overall & MEASURE_PEAK_COUNT)
903		✗	av_log(ctx, AV_LOG_INFO, "Peak count: %f\n", (min_count + max_count) / (double)s->nb_channels);
904		✗	if (s->measure_overall & MEASURE_ABS_PEAK_COUNT)
905		✗	av_log(ctx, AV_LOG_INFO, "Abs Peak count: %f\n", abs_peak_count / (double)s->nb_channels);
906		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR)
907		✗	av_log(ctx, AV_LOG_INFO, "Noise floor dB: %f\n", LINEAR_TO_DB(noise_floor));
908		✗	if (s->measure_overall & MEASURE_NOISE_FLOOR_COUNT)
909		✗	av_log(ctx, AV_LOG_INFO, "Noise floor count: %f\n", noise_floor_count / (double)s->nb_channels);
910		✗	if (s->measure_overall & MEASURE_ENTROPY)
911		✗	av_log(ctx, AV_LOG_INFO, "Entropy: %f\n", entropy / (double)s->nb_channels);
912		✗	if (s->measure_overall & MEASURE_BIT_DEPTH) {
913		✗	bit_depth(s, mask, depth);
914		✗	av_log(ctx, AV_LOG_INFO, "Bit depth: %u/%u/%u/%u\n", depth[0], depth[1], depth[2], depth[3]);
915			}
916		✗	if (s->measure_overall & MEASURE_NUMBER_OF_SAMPLES)
917		✗	av_log(ctx, AV_LOG_INFO, "Number of samples: %"PRId64"\n", nb_samples / s->nb_channels);
918		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_NANS)
919		✗	av_log(ctx, AV_LOG_INFO, "Number of NaNs: %f\n", nb_nans / (float)s->nb_channels);
920		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_INFS)
921		✗	av_log(ctx, AV_LOG_INFO, "Number of Infs: %f\n", nb_infs / (float)s->nb_channels);
922		✗	if ((s->is_float || s->is_double) && s->measure_overall & MEASURE_NUMBER_OF_DENORMALS)
923		✗	av_log(ctx, AV_LOG_INFO, "Number of denormals: %f\n", nb_denormals / (float)s->nb_channels);
924			}
925
926		✗	static av_cold void uninit(AVFilterContext *ctx)
927			{
928		✗	AudioStatsContext *s = ctx->priv;
929
930		✗	if (s->nb_channels)
931		✗	print_stats(ctx);
932		✗	if (s->chstats) {
933		✗	for (int i = 0; i < s->nb_channels; i++) {
934		✗	ChannelStats *p = &s->chstats[i];
935
936		✗	av_freep(&p->win_samples);
937		✗	av_freep(&p->sorted_samples);
938			}
939			}
940		✗	av_freep(&s->chstats);
941		✗	}
942
943			static const AVFilterPad astats_inputs[] = {
944			{
945			.name = "default",
946			.type = AVMEDIA_TYPE_AUDIO,
947			.filter_frame = filter_frame,
948			},
949			};
950
951			static const AVFilterPad astats_outputs[] = {
952			{
953			.name = "default",
954			.type = AVMEDIA_TYPE_AUDIO,
955			.config_props = config_output,
956			},
957			};
958
959			const FFFilter ff_af_astats = {
960			.p.name = "astats",
961			.p.description = NULL_IF_CONFIG_SMALL("Show time domain statistics about audio frames."),
962			.p.priv_class = &astats_class,
963			.p.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_METADATA_ONLY,
964			.priv_size = sizeof(AudioStatsContext),
965			.uninit = uninit,
966			FILTER_INPUTS(astats_inputs),
967			FILTER_OUTPUTS(astats_outputs),
968			FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16P,
969			AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32P,
970			AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64P,
971			AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
972			AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP),
973			};
974