FFmpeg  4.4.6
vf_readeia608.c
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1 /*
2  * Copyright (c) 2017 Paul B Mahol
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * Filter for reading closed captioning data (EIA-608).
24  * See also https://en.wikipedia.org/wiki/EIA-608
25  */
26 
27 #include <string.h>
28 
29 #include "libavutil/internal.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/timestamp.h"
33 
34 #include "avfilter.h"
35 #include "formats.h"
36 #include "internal.h"
37 #include "video.h"
38 
39 #define LAG 25
40 #define CLOCK_BITSIZE_MIN 0.2f
41 #define CLOCK_BITSIZE_MAX 1.5f
42 #define SYNC_BITSIZE_MIN 12.f
43 #define SYNC_BITSIZE_MAX 15.f
44 
45 typedef struct LineItem {
46  int input;
47  int output;
48 
49  float unfiltered;
50  float filtered;
51  float average;
52  float deviation;
53 } LineItem;
54 
55 typedef struct CodeItem {
57  int size;
58 } CodeItem;
59 
60 typedef struct ScanItem {
61  int nb_line;
62  int found;
63  int white;
64  int black;
65  uint64_t *histogram;
66  uint8_t byte[2];
67 
70 } ScanItem;
71 
72 typedef struct ReadEIA608Context {
73  const AVClass *class;
74 
75  int start, end;
76  float spw;
77  int chp;
78  int lp;
79 
80  int depth;
81  int max;
84 
85  void (*read_line[2])(AVFrame *in, int nb_line,
86  LineItem *line, int lp, int w);
88 
89 #define OFFSET(x) offsetof(ReadEIA608Context, x)
90 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
91 
92 static const AVOption readeia608_options[] = {
93  { "scan_min", "set from which line to scan for codes", OFFSET(start), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
94  { "scan_max", "set to which line to scan for codes", OFFSET(end), AV_OPT_TYPE_INT, {.i64=29}, 0, INT_MAX, FLAGS },
95  { "spw", "set ratio of width reserved for sync code detection", OFFSET(spw), AV_OPT_TYPE_FLOAT, {.dbl=.27}, 0.1, 0.7, FLAGS },
96  { "chp", "check and apply parity bit", OFFSET(chp), AV_OPT_TYPE_BOOL, {.i64= 0}, 0, 1, FLAGS },
97  { "lp", "lowpass line prior to processing", OFFSET(lp), AV_OPT_TYPE_BOOL, {.i64= 1}, 0, 1, FLAGS },
98  { NULL }
99 };
100 
102 
104 {
105  static const enum AVPixelFormat pixel_fmts[] = {
127  };
129  if (!formats)
130  return AVERROR(ENOMEM);
132 }
133 
134 static int config_filter(AVFilterContext *ctx, int start, int end)
135 {
136  ReadEIA608Context *s = ctx->priv;
137  AVFilterLink *inlink = ctx->inputs[0];
138  int size = inlink->w + LAG;
139 
140  if (end >= inlink->h) {
141  av_log(ctx, AV_LOG_WARNING, "Last line to scan too large, clipping.\n");
142  end = inlink->h - 1;
143  }
144 
145  if (start > end) {
146  av_log(ctx, AV_LOG_ERROR, "Invalid range.\n");
147  return AVERROR(EINVAL);
148  }
149 
150  if (s->nb_allocated < end - start + 1) {
151  const int diff = end - start + 1 - s->nb_allocated;
152 
153  s->scan = av_realloc_f(s->scan, end - start + 1, sizeof(*s->scan));
154  if (!s->scan)
155  return AVERROR(ENOMEM);
156  memset(&s->scan[s->nb_allocated], 0, diff * sizeof(*s->scan));
157  s->nb_allocated = end - start + 1;
158  }
159 
160  for (int i = 0; i < s->nb_allocated; i++) {
161  ScanItem *scan = &s->scan[i];
162 
163  if (!scan->histogram)
164  scan->histogram = av_calloc(s->max + 1, sizeof(*scan->histogram));
165  if (!scan->line)
166  scan->line = av_calloc(size, sizeof(*scan->line));
167  if (!scan->code)
168  scan->code = av_calloc(size, sizeof(*scan->code));
169  if (!scan->line || !scan->code || !scan->histogram)
170  return AVERROR(ENOMEM);
171  }
172 
173  s->start = start;
174  s->end = end;
175 
176  return 0;
177 }
178 
179 static void build_histogram(ReadEIA608Context *s, ScanItem *scan, const LineItem *line, int len)
180 {
181  memset(scan->histogram, 0, (s->max + 1) * sizeof(*scan->histogram));
182 
183  for (int i = LAG; i < len + LAG; i++)
184  scan->histogram[line[i].input]++;
185 }
186 
188 {
189  const int max = s->max;
190  int start = 0, end = 0, middle;
191  int black = 0, white = 0;
192  int cnt;
193 
194  for (int i = 0; i <= max; i++) {
195  if (scan->histogram[i]) {
196  start = i;
197  break;
198  }
199  }
200 
201  for (int i = max; i >= 0; i--) {
202  if (scan->histogram[i]) {
203  end = i;
204  break;
205  }
206  }
207 
208  middle = start + (end - start) / 2;
209 
210  cnt = 0;
211  for (int i = start; i <= middle; i++) {
212  if (scan->histogram[i] > cnt) {
213  cnt = scan->histogram[i];
214  black = i;
215  }
216  }
217 
218  cnt = 0;
219  for (int i = end; i >= middle; i--) {
220  if (scan->histogram[i] > cnt) {
221  cnt = scan->histogram[i];
222  white = i;
223  }
224  }
225 
226  scan->black = black;
227  scan->white = white;
228 }
229 
230 static float meanf(const LineItem *line, int len)
231 {
232  float sum = 0.0, mean = 0.0;
233 
234  for (int i = 0; i < len; i++)
235  sum += line[i].filtered;
236 
237  mean = sum / len;
238 
239  return mean;
240 }
241 
242 static float stddevf(const LineItem *line, int len)
243 {
244  float m = meanf(line, len);
245  float standard_deviation = 0.f;
246 
247  for (int i = 0; i < len; i++)
248  standard_deviation += (line[i].filtered - m) * (line[i].filtered - m);
249 
250  return sqrtf(standard_deviation / (len - 1));
251 }
252 
254  int lag, float threshold, float influence, int len)
255 {
256  for (int i = lag; i < len + lag; i++) {
257  line[i].unfiltered = line[i].input / 255.f;
258  line[i].filtered = line[i].unfiltered;
259  }
260 
261  for (int i = 0; i < lag; i++) {
262  line[i].unfiltered = meanf(line, len * s->spw);
263  line[i].filtered = line[i].unfiltered;
264  }
265 
266  line[lag - 1].average = meanf(line, lag);
267  line[lag - 1].deviation = stddevf(line, lag);
268 
269  for (int i = lag; i < len + lag; i++) {
270  if (fabsf(line[i].unfiltered - line[i-1].average) > threshold * line[i-1].deviation) {
271  if (line[i].unfiltered > line[i-1].average) {
272  line[i].output = 255;
273  } else {
274  line[i].output = 0;
275  }
276 
277  line[i].filtered = influence * line[i].unfiltered + (1.f - influence) * line[i-1].filtered;
278  } else {
279  int distance_from_black, distance_from_white;
280 
281  distance_from_black = FFABS(line[i].input - scan->black);
282  distance_from_white = FFABS(line[i].input - scan->white);
283 
284  line[i].output = distance_from_black <= distance_from_white ? 0 : 255;
285  }
286 
287  line[i].average = meanf(line + i - lag, lag);
288  line[i].deviation = stddevf(line + i - lag, lag);
289  }
290 }
291 
292 static int periods(const LineItem *line, CodeItem *code, int len)
293 {
294  int hold = line[LAG].output, cnt = 0;
295  int last = LAG;
296 
297  memset(code, 0, len * sizeof(*code));
298 
299  for (int i = LAG + 1; i < len + LAG; i++) {
300  if (line[i].output != hold) {
301  code[cnt].size = i - last;
302  code[cnt].bit = hold;
303  hold = line[i].output;
304  last = i;
305  cnt++;
306  }
307  }
308 
309  code[cnt].size = LAG + len - last;
310  code[cnt].bit = hold;
311 
312  return cnt + 1;
313 }
314 
315 static void dump_code(AVFilterContext *ctx, ScanItem *scan, int len, int item)
316 {
317  av_log(ctx, AV_LOG_DEBUG, "%d:", item);
318  for (int i = 0; i < len; i++) {
319  av_log(ctx, AV_LOG_DEBUG, " %03d", scan->code[i].size);
320  }
321  av_log(ctx, AV_LOG_DEBUG, "\n");
322 }
323 
324 #define READ_LINE(type, name) \
325 static void read_##name(AVFrame *in, int nb_line, LineItem *line, int lp, int w) \
326 { \
327  const type *src = (const type *)(&in->data[0][nb_line * in->linesize[0]]);\
328  \
329  if (lp) { \
330  for (int i = 0; i < w; i++) { \
331  int a = FFMAX(i - 3, 0); \
332  int b = FFMAX(i - 2, 0); \
333  int c = FFMAX(i - 1, 0); \
334  int d = FFMIN(i + 3, w-1); \
335  int e = FFMIN(i + 2, w-1); \
336  int f = FFMIN(i + 1, w-1); \
337  \
338  line[LAG + i].input = (src[a] + src[b] + src[c] + src[i] + \
339  src[d] + src[e] + src[f] + 6) / 7; \
340  } \
341  } else { \
342  for (int i = 0; i < w; i++) { \
343  line[LAG + i].input = src[i]; \
344  } \
345  } \
346 }
347 
348 READ_LINE(uint8_t, byte)
349 READ_LINE(uint16_t, word)
350 
351 static int config_input(AVFilterLink *inlink)
352 {
353  AVFilterContext *ctx = inlink->dst;
354  ReadEIA608Context *s = ctx->priv;
355  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
356 
357  if (!desc)
358  return AVERROR_BUG;
359  s->depth = desc->comp[0].depth;
360  s->max = (1 << desc->comp[0].depth) - 1;
361  s->read_line[0] = read_byte;
362  s->read_line[1] = read_word;
363 
364  return config_filter(ctx, s->start, s->end);
365 }
366 
367 static void extract_line(AVFilterContext *ctx, AVFrame *in, ScanItem *scan, int w, int nb_line)
368 {
369  ReadEIA608Context *s = ctx->priv;
370  LineItem *line = scan->line;
371  int i, j, ch, len;
372  uint8_t codes[19] = { 0 };
373  float bit_size = 0.f;
374  int parity;
375 
376  memset(line, 0, (w + LAG) * sizeof(*line));
377  scan->byte[0] = scan->byte[1] = 0;
378  scan->found = 0;
379 
380  s->read_line[s->depth > 8](in, nb_line, line, s->lp, w);
381 
382  build_histogram(s, scan, line, w);
383  find_black_and_white(s, scan);
384  if (scan->white - scan->black < 5)
385  return;
386 
387  thresholding(s, scan, line, LAG, 1, 0, w);
388  len = periods(line, scan->code, w);
389  dump_code(ctx, scan, len, nb_line);
390  if (len < 15 ||
391  scan->code[14].bit != 0 ||
392  w / (float)scan->code[14].size < SYNC_BITSIZE_MIN ||
393  w / (float)scan->code[14].size > SYNC_BITSIZE_MAX) {
394  return;
395  }
396 
397  for (i = 14; i < len; i++) {
398  bit_size += scan->code[i].size;
399  }
400 
401  bit_size /= 19.f;
402  for (i = 1; i < 14; i++) {
403  if (scan->code[i].size / bit_size > CLOCK_BITSIZE_MAX ||
404  scan->code[i].size / bit_size < CLOCK_BITSIZE_MIN) {
405  return;
406  }
407  }
408 
409  if (scan->code[15].size / bit_size < 0.45f) {
410  return;
411  }
412 
413  for (j = 0, i = 14; i < len; i++) {
414  int run, bit;
415 
416  run = lrintf(scan->code[i].size / bit_size);
417  bit = scan->code[i].bit;
418 
419  for (int k = 0; j < 19 && k < run; k++) {
420  codes[j++] = bit;
421  }
422 
423  if (j >= 19)
424  break;
425  }
426 
427  for (ch = 0; ch < 2; ch++) {
428  for (parity = 0, i = 0; i < 8; i++) {
429  int b = codes[3 + ch * 8 + i];
430 
431  if (b == 255) {
432  parity++;
433  b = 1;
434  } else {
435  b = 0;
436  }
437  scan->byte[ch] |= b << i;
438  }
439 
440  if (s->chp) {
441  if (!(parity & 1)) {
442  scan->byte[ch] = 0x7F;
443  }
444  }
445  }
446 
447  scan->nb_line = nb_line;
448  scan->found = 1;
449 }
450 
452  int job, int nb_jobs)
453 {
454  ReadEIA608Context *s = ctx->priv;
455  AVFilterLink *inlink = ctx->inputs[0];
456  const int h = s->end - s->start + 1;
457  const int start = (h * job) / nb_jobs;
458  const int end = (h * (job+1)) / nb_jobs;
459  AVFrame *in = arg;
460 
461  for (int i = start; i < end; i++) {
462  ScanItem *scan = &s->scan[i];
463 
464  extract_line(ctx, in, scan, inlink->w, i);
465  }
466 
467  return 0;
468 }
469 
470 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
471 {
472  AVFilterContext *ctx = inlink->dst;
473  AVFilterLink *outlink = ctx->outputs[0];
474  ReadEIA608Context *s = ctx->priv;
475  int nb_found;
476 
477  ctx->internal->execute(ctx, extract_lines, in, NULL, FFMIN(FFMAX(s->end - s->start + 1, 1),
479 
480  nb_found = 0;
481  for (int i = 0; i < s->end - s->start + 1; i++) {
482  ScanItem *scan = &s->scan[i];
483  uint8_t key[128], value[128];
484 
485  if (!scan->found)
486  continue;
487 
488  //snprintf(key, sizeof(key), "lavfi.readeia608.%d.bits", nb_found);
489  //snprintf(value, sizeof(value), "0b%d%d%d%d%d%d%d%d 0b%d%d%d%d%d%d%d%d", codes[3]==255,codes[4]==255,codes[5]==255,codes[6]==255,codes[7]==255,codes[8]==255,codes[9]==255,codes[10]==255,codes[11]==255,codes[12]==255,codes[13]==255,codes[14]==255,codes[15]==255,codes[16]==255,codes[17]==255,codes[18]==255);
490  //av_dict_set(&in->metadata, key, value, 0);
491 
492  snprintf(key, sizeof(key), "lavfi.readeia608.%d.cc", nb_found);
493  snprintf(value, sizeof(value), "0x%02X%02X", scan->byte[0], scan->byte[1]);
494  av_dict_set(&in->metadata, key, value, 0);
495 
496  snprintf(key, sizeof(key), "lavfi.readeia608.%d.line", nb_found);
497  snprintf(value, sizeof(value), "%d", scan->nb_line);
498  av_dict_set(&in->metadata, key, value, 0);
499 
500  nb_found++;
501  }
502 
503  return ff_filter_frame(outlink, in);
504 }
505 
507 {
508  ReadEIA608Context *s = ctx->priv;
509 
510  for (int i = 0; i < s->nb_allocated; i++) {
511  ScanItem *scan = &s->scan[i];
512 
513  av_freep(&scan->histogram);
514  av_freep(&scan->code);
515  av_freep(&scan->line);
516  }
517 
518  s->nb_allocated = 0;
519  av_freep(&s->scan);
520 }
521 
522 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
523  char *res, int res_len, int flags)
524 {
525  ReadEIA608Context *s = ctx->priv;
526  int ret, start = s->start, end = s->end;
527 
528  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
529  if (ret < 0)
530  return ret;
531 
532  ret = config_filter(ctx, s->start, s->end);
533  if (ret < 0) {
534  s->start = start;
535  s->end = end;
536  }
537 
538  return 0;
539 }
540 
541 static const AVFilterPad readeia608_inputs[] = {
542  {
543  .name = "default",
544  .type = AVMEDIA_TYPE_VIDEO,
545  .filter_frame = filter_frame,
546  .config_props = config_input,
547  },
548  { NULL }
549 };
550 
551 static const AVFilterPad readeia608_outputs[] = {
552  {
553  .name = "default",
554  .type = AVMEDIA_TYPE_VIDEO,
555  },
556  { NULL }
557 };
558 
560  .name = "readeia608",
561  .description = NULL_IF_CONFIG_SMALL("Read EIA-608 Closed Caption codes from input video and write them to frame metadata."),
562  .priv_size = sizeof(ReadEIA608Context),
563  .priv_class = &readeia608_class,
567  .uninit = uninit,
570 };
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define av_cold
Definition: attributes.h:88
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:882
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
Main libavfilter public API header.
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define bit(string, value)
Definition: cbs_mpeg2.c:58
#define s(width, name)
Definition: cbs_vp9.c:257
#define FFMIN(a, b)
Definition: common.h:105
#define FFMAX(a, b)
Definition: common.h:103
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define NULL
Definition: coverity.c:32
static __device__ float fabsf(float a)
Definition: cuda_runtime.h:181
#define max(a, b)
Definition: cuda_runtime.h:33
double value
Definition: eval.c:98
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:587
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:126
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
const char * key
int i
Definition: input.c:407
const char * arg
Definition: jacosubdec.c:66
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define lrintf(x)
Definition: libm_mips.h:70
const char * desc
Definition: libsvtav1.c:79
uint8_t w
Definition: llviddspenc.c:39
AVOptions.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:410
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:398
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:405
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:379
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:397
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:434
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:381
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:433
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition: pixfmt.h:100
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:439
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:408
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:380
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:382
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:411
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:401
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:383
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:440
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:412
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
typedef void(RENAME(mix_any_func_type))
formats
Definition: signature.h:48
#define snprintf
Definition: snprintf.h:34
const uint8_t * code
Definition: spdifenc.c:413
Describe the class of an AVClass context structure.
Definition: log.h:67
An instance of a filter.
Definition: avfilter.h:341
A list of supported formats for one end of a filter link.
Definition: formats.h:65
A filter pad used for either input or output.
Definition: internal.h:54
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1699
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
AVOption.
Definition: opt.h:248
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
uint8_t bit
Definition: vf_readeia608.c:56
float average
Definition: vf_readeia608.c:51
float deviation
Definition: vf_readeia608.c:52
float unfiltered
Definition: vf_readeia608.c:49
float filtered
Definition: vf_readeia608.c:50
void(* read_line[2])(AVFrame *in, int nb_line, LineItem *line, int lp, int w)
Definition: vf_readeia608.c:85
uint8_t byte[2]
Definition: vf_readeia608.c:66
uint64_t * histogram
Definition: vf_readeia608.c:65
CodeItem * code
Definition: vf_readeia608.c:68
LineItem * line
Definition: vf_readeia608.c:69
Definition: graph2dot.c:48
uint8_t run
Definition: svq3.c:205
#define av_realloc_f(p, o, n)
#define av_freep(p)
#define av_log(a,...)
AVFormatContext * ctx
Definition: movenc.c:48
timestamp utils, mostly useful for debugging/logging purposes
int size
const char * b
Definition: vf_curves.c:118
mcdeint parity
Definition: vf_mcdeint.c:277
static float mean(const float *input, int size)
Definition: vf_nnedi.c:864
static av_always_inline int diff(const uint32_t a, const uint32_t b)
#define CLOCK_BITSIZE_MIN
Definition: vf_readeia608.c:40
static const AVOption readeia608_options[]
Definition: vf_readeia608.c:92
static float meanf(const LineItem *line, int len)
AVFILTER_DEFINE_CLASS(readeia608)
#define READ_LINE(type, name)
#define SYNC_BITSIZE_MAX
Definition: vf_readeia608.c:43
static void build_histogram(ReadEIA608Context *s, ScanItem *scan, const LineItem *line, int len)
static int query_formats(AVFilterContext *ctx)
#define LAG
Definition: vf_readeia608.c:39
static int config_input(AVFilterLink *inlink)
static const AVFilterPad readeia608_outputs[]
#define FLAGS
Definition: vf_readeia608.c:90
#define SYNC_BITSIZE_MIN
Definition: vf_readeia608.c:42
static void extract_line(AVFilterContext *ctx, AVFrame *in, ScanItem *scan, int w, int nb_line)
static void find_black_and_white(ReadEIA608Context *s, ScanItem *scan)
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
static int periods(const LineItem *line, CodeItem *code, int len)
static int config_filter(AVFilterContext *ctx, int start, int end)
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static av_cold void uninit(AVFilterContext *ctx)
static float stddevf(const LineItem *line, int len)
AVFilter ff_vf_readeia608
#define OFFSET(x)
Definition: vf_readeia608.c:89
static void dump_code(AVFilterContext *ctx, ScanItem *scan, int len, int item)
static int extract_lines(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
#define CLOCK_BITSIZE_MAX
Definition: vf_readeia608.c:41
static const AVFilterPad readeia608_inputs[]
static void thresholding(ReadEIA608Context *s, ScanItem *scan, LineItem *line, int lag, float threshold, float influence, int len)
int len