FFmpeg  4.4.5
f_select.c
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1 /*
2  * Copyright (c) 2011 Stefano Sabatini
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 selecting which frame passes in the filterchain
24  */
25 
26 #include "libavutil/avstring.h"
27 #include "libavutil/eval.h"
28 #include "libavutil/fifo.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
33 #include "avfilter.h"
34 #include "audio.h"
35 #include "formats.h"
36 #include "internal.h"
37 #include "video.h"
38 #include "scene_sad.h"
39 
40 static const char *const var_names[] = {
41  "TB", ///< timebase
42 
43  "pts", ///< original pts in the file of the frame
44  "start_pts", ///< first PTS in the stream, expressed in TB units
45  "prev_pts", ///< previous frame PTS
46  "prev_selected_pts", ///< previous selected frame PTS
47 
48  "t", ///< timestamp expressed in seconds
49  "start_t", ///< first PTS in the stream, expressed in seconds
50  "prev_t", ///< previous frame time
51  "prev_selected_t", ///< previously selected time
52 
53  "pict_type", ///< the type of picture in the movie
54  "I",
55  "P",
56  "B",
57  "S",
58  "SI",
59  "SP",
60  "BI",
61  "PICT_TYPE_I",
62  "PICT_TYPE_P",
63  "PICT_TYPE_B",
64  "PICT_TYPE_S",
65  "PICT_TYPE_SI",
66  "PICT_TYPE_SP",
67  "PICT_TYPE_BI",
68 
69  "interlace_type", ///< the frame interlace type
70  "PROGRESSIVE",
71  "TOPFIRST",
72  "BOTTOMFIRST",
73 
74  "consumed_samples_n",///< number of samples consumed by the filter (only audio)
75  "samples_n", ///< number of samples in the current frame (only audio)
76  "sample_rate", ///< sample rate (only audio)
77 
78  "n", ///< frame number (starting from zero)
79  "selected_n", ///< selected frame number (starting from zero)
80  "prev_selected_n", ///< number of the last selected frame
81 
82  "key", ///< tell if the frame is a key frame
83  "pos", ///< original position in the file of the frame
84 
85  "scene",
86 
87  "concatdec_select", ///< frame is within the interval set by the concat demuxer
88 
89  NULL
90 };
91 
92 enum var_name {
94 
99 
104 
120 
125 
129 
133 
136 
138 
140 
142 };
143 
144 typedef struct SelectContext {
145  const AVClass *class;
146  char *expr_str;
149  int bitdepth;
151  ptrdiff_t width[4];
152  ptrdiff_t height[4];
153  int do_scene_detect; ///< 1 if the expression requires scene detection variables, 0 otherwise
154  ff_scene_sad_fn sad; ///< Sum of the absolute difference function (scene detect only)
155  double prev_mafd; ///< previous MAFD (scene detect only)
156  AVFrame *prev_picref; ///< previous frame (scene detect only)
157  double select;
158  int select_out; ///< mark the selected output pad index
160 } SelectContext;
161 
162 #define OFFSET(x) offsetof(SelectContext, x)
163 #define DEFINE_OPTIONS(filt_name, FLAGS) \
164 static const AVOption filt_name##_options[] = { \
165  { "expr", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
166  { "e", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
167  { "outputs", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
168  { "n", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
169  { NULL } \
170 }
171 
172 static int request_frame(AVFilterLink *outlink);
173 
175 {
176  SelectContext *select = ctx->priv;
177  int i, ret;
178 
179  if ((ret = av_expr_parse(&select->expr, select->expr_str,
180  var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
181  av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n",
182  select->expr_str);
183  return ret;
184  }
185  select->do_scene_detect = !!strstr(select->expr_str, "scene");
186 
187  for (i = 0; i < select->nb_outputs; i++) {
188  AVFilterPad pad = { 0 };
189 
190  pad.name = av_asprintf("output%d", i);
191  if (!pad.name)
192  return AVERROR(ENOMEM);
193  pad.type = ctx->filter->inputs[0].type;
195  if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
196  av_freep(&pad.name);
197  return ret;
198  }
199  }
200 
201  return 0;
202 }
203 
204 #define INTERLACE_TYPE_P 0
205 #define INTERLACE_TYPE_T 1
206 #define INTERLACE_TYPE_B 2
207 
208 static int config_input(AVFilterLink *inlink)
209 {
210  SelectContext *select = inlink->dst->priv;
212  int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) &&
213  (desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
214  desc->nb_components >= 3;
215 
216  select->bitdepth = desc->comp[0].depth;
217  select->nb_planes = is_yuv ? 1 : av_pix_fmt_count_planes(inlink->format);
218 
219  for (int plane = 0; plane < select->nb_planes; plane++) {
220  ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane);
221  int vsub = desc->log2_chroma_h;
222 
223  select->width[plane] = line_size >> (select->bitdepth > 8);
224  select->height[plane] = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;
225  }
226 
227  select->var_values[VAR_N] = 0.0;
228  select->var_values[VAR_SELECTED_N] = 0.0;
229 
230  select->var_values[VAR_TB] = av_q2d(inlink->time_base);
231 
232  select->var_values[VAR_PREV_PTS] = NAN;
235  select->var_values[VAR_PREV_T] = NAN;
236  select->var_values[VAR_START_PTS] = NAN;
237  select->var_values[VAR_START_T] = NAN;
238 
251 
255 
256  select->var_values[VAR_PICT_TYPE] = NAN;
257  select->var_values[VAR_INTERLACE_TYPE] = NAN;
258  select->var_values[VAR_SCENE] = NAN;
260  select->var_values[VAR_SAMPLES_N] = NAN;
261 
262  select->var_values[VAR_SAMPLE_RATE] =
263  inlink->type == AVMEDIA_TYPE_AUDIO ? inlink->sample_rate : NAN;
264 
265  if (CONFIG_SELECT_FILTER && select->do_scene_detect) {
266  select->sad = ff_scene_sad_get_fn(select->bitdepth == 8 ? 8 : 16);
267  if (!select->sad)
268  return AVERROR(EINVAL);
269  }
270  return 0;
271 }
272 
274 {
275  double ret = 0;
276  SelectContext *select = ctx->priv;
277  AVFrame *prev_picref = select->prev_picref;
278 
279  if (prev_picref &&
280  frame->height == prev_picref->height &&
281  frame->width == prev_picref->width) {
282  uint64_t sad = 0;
283  double mafd, diff;
284  uint64_t count = 0;
285 
286  for (int plane = 0; plane < select->nb_planes; plane++) {
287  uint64_t plane_sad;
288  select->sad(prev_picref->data[plane], prev_picref->linesize[plane],
289  frame->data[plane], frame->linesize[plane],
290  select->width[plane], select->height[plane], &plane_sad);
291  sad += plane_sad;
292  count += select->width[plane] * select->height[plane];
293  }
294 
295  emms_c();
296  mafd = (double)sad / count / (1ULL << (select->bitdepth - 8));
297  diff = fabs(mafd - select->prev_mafd);
298  ret = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
299  select->prev_mafd = mafd;
300  av_frame_free(&prev_picref);
301  }
302  select->prev_picref = av_frame_clone(frame);
303  return ret;
304 }
305 
307 {
308  AVDictionary *metadata = frame->metadata;
309  AVDictionaryEntry *start_time_entry = av_dict_get(metadata, "lavf.concatdec.start_time", NULL, 0);
310  AVDictionaryEntry *duration_entry = av_dict_get(metadata, "lavf.concatdec.duration", NULL, 0);
311  if (start_time_entry) {
312  int64_t start_time = strtoll(start_time_entry->value, NULL, 10);
313  if (pts >= start_time) {
314  if (duration_entry) {
315  int64_t duration = strtoll(duration_entry->value, NULL, 10);
316  if (pts < start_time + duration)
317  return -1;
318  else
319  return 0;
320  }
321  return -1;
322  }
323  return 0;
324  }
325  return NAN;
326 }
327 
329 {
330  SelectContext *select = ctx->priv;
331  AVFilterLink *inlink = ctx->inputs[0];
332  double res;
333 
334  if (isnan(select->var_values[VAR_START_PTS]))
335  select->var_values[VAR_START_PTS] = TS2D(frame->pts);
336  if (isnan(select->var_values[VAR_START_T]))
337  select->var_values[VAR_START_T] = TS2D(frame->pts) * av_q2d(inlink->time_base);
338 
339  select->var_values[VAR_N ] = inlink->frame_count_out;
340  select->var_values[VAR_PTS] = TS2D(frame->pts);
341  select->var_values[VAR_T ] = TS2D(frame->pts) * av_q2d(inlink->time_base);
342  select->var_values[VAR_POS] = frame->pkt_pos == -1 ? NAN : frame->pkt_pos;
343  select->var_values[VAR_KEY] = frame->key_frame;
345 
346  switch (inlink->type) {
347  case AVMEDIA_TYPE_AUDIO:
349  break;
350 
351  case AVMEDIA_TYPE_VIDEO:
352  select->var_values[VAR_INTERLACE_TYPE] =
356  if (select->do_scene_detect) {
357  char buf[32];
359  // TODO: document metadata
360  snprintf(buf, sizeof(buf), "%f", select->var_values[VAR_SCENE]);
361  av_dict_set(&frame->metadata, "lavfi.scene_score", buf, 0);
362  }
363  break;
364  }
365 
366  select->select = res = av_expr_eval(select->expr, select->var_values, NULL);
367  av_log(inlink->dst, AV_LOG_DEBUG,
368  "n:%f pts:%f t:%f key:%d",
369  select->var_values[VAR_N],
370  select->var_values[VAR_PTS],
371  select->var_values[VAR_T],
372  frame->key_frame);
373 
374  switch (inlink->type) {
375  case AVMEDIA_TYPE_VIDEO:
376  av_log(inlink->dst, AV_LOG_DEBUG, " interlace_type:%c pict_type:%c scene:%f",
377  (!frame->interlaced_frame) ? 'P' :
378  frame->top_field_first ? 'T' : 'B',
380  select->var_values[VAR_SCENE]);
381  break;
382  case AVMEDIA_TYPE_AUDIO:
383  av_log(inlink->dst, AV_LOG_DEBUG, " samples_n:%d consumed_samples_n:%f",
384  frame->nb_samples,
386  break;
387  }
388 
389  if (res == 0) {
390  select->select_out = -1; /* drop */
391  } else if (isnan(res) || res < 0) {
392  select->select_out = 0; /* first output */
393  } else {
394  select->select_out = FFMIN(ceilf(res)-1, select->nb_outputs-1); /* other outputs */
395  }
396 
397  av_log(inlink->dst, AV_LOG_DEBUG, " -> select:%f select_out:%d\n", res, select->select_out);
398 
399  if (res) {
400  select->var_values[VAR_PREV_SELECTED_N] = select->var_values[VAR_N];
402  select->var_values[VAR_PREV_SELECTED_T] = select->var_values[VAR_T];
403  select->var_values[VAR_SELECTED_N] += 1.0;
404  if (inlink->type == AVMEDIA_TYPE_AUDIO)
406  }
407 
408  select->var_values[VAR_PREV_PTS] = select->var_values[VAR_PTS];
409  select->var_values[VAR_PREV_T] = select->var_values[VAR_T];
410 }
411 
412 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
413 {
414  AVFilterContext *ctx = inlink->dst;
415  SelectContext *select = ctx->priv;
416 
418  if (select->select)
419  return ff_filter_frame(ctx->outputs[select->select_out], frame);
420 
422  return 0;
423 }
424 
425 static int request_frame(AVFilterLink *outlink)
426 {
427  AVFilterLink *inlink = outlink->src->inputs[0];
428  int ret = ff_request_frame(inlink);
429  return ret;
430 }
431 
433 {
434  SelectContext *select = ctx->priv;
435  int i;
436 
437  av_expr_free(select->expr);
438  select->expr = NULL;
439 
440  for (i = 0; i < ctx->nb_outputs; i++)
441  av_freep(&ctx->output_pads[i].name);
442 
443  if (select->do_scene_detect) {
444  av_frame_free(&select->prev_picref);
445  }
446 }
447 
448 #if CONFIG_ASELECT_FILTER
449 
451 AVFILTER_DEFINE_CLASS(aselect);
452 
453 static av_cold int aselect_init(AVFilterContext *ctx)
454 {
455  SelectContext *select = ctx->priv;
456  int ret;
457 
458  if ((ret = init(ctx)) < 0)
459  return ret;
460 
461  if (select->do_scene_detect) {
462  av_log(ctx, AV_LOG_ERROR, "Scene detection is ignored in aselect filter\n");
463  return AVERROR(EINVAL);
464  }
465 
466  return 0;
467 }
468 
469 static const AVFilterPad avfilter_af_aselect_inputs[] = {
470  {
471  .name = "default",
472  .type = AVMEDIA_TYPE_AUDIO,
473  .config_props = config_input,
474  .filter_frame = filter_frame,
475  },
476  { NULL }
477 };
478 
480  .name = "aselect",
481  .description = NULL_IF_CONFIG_SMALL("Select audio frames to pass in output."),
482  .init = aselect_init,
483  .uninit = uninit,
484  .priv_size = sizeof(SelectContext),
485  .inputs = avfilter_af_aselect_inputs,
486  .priv_class = &aselect_class,
488 };
489 #endif /* CONFIG_ASELECT_FILTER */
490 
491 #if CONFIG_SELECT_FILTER
492 
493 static int query_formats(AVFilterContext *ctx)
494 {
495  SelectContext *select = ctx->priv;
496 
497  if (!select->do_scene_detect) {
499  } else {
500  int ret;
501  static const enum AVPixelFormat pix_fmts[] = {
508  };
510 
511  if (!fmts_list)
512  return AVERROR(ENOMEM);
513  ret = ff_set_common_formats(ctx, fmts_list);
514  if (ret < 0)
515  return ret;
516  }
517  return 0;
518 }
519 
521 AVFILTER_DEFINE_CLASS(select);
522 
523 static av_cold int select_init(AVFilterContext *ctx)
524 {
525  int ret;
526 
527  if ((ret = init(ctx)) < 0)
528  return ret;
529 
530  return 0;
531 }
532 
533 static const AVFilterPad avfilter_vf_select_inputs[] = {
534  {
535  .name = "default",
536  .type = AVMEDIA_TYPE_VIDEO,
537  .config_props = config_input,
538  .filter_frame = filter_frame,
539  },
540  { NULL }
541 };
542 
544  .name = "select",
545  .description = NULL_IF_CONFIG_SMALL("Select video frames to pass in output."),
546  .init = select_init,
547  .uninit = uninit,
548  .query_formats = query_formats,
549  .priv_size = sizeof(SelectContext),
550  .priv_class = &select_class,
551  .inputs = avfilter_vf_select_inputs,
553 };
554 #endif /* CONFIG_SELECT_FILTER */
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:243
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
AVFilter ff_vf_select
AVFilter ff_af_aselect
#define av_cold
Definition: attributes.h:88
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:408
Main libavfilter public API header.
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define FFMIN(a, b)
Definition: common.h:105
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define av_clipf
Definition: common.h:170
#define CONFIG_SELECT_FILTER
Definition: config.h:2027
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
static __device__ float fabs(float a)
Definition: cuda_runtime.h:182
static __device__ float ceilf(float a)
Definition: cuda_runtime.h:175
static AVFrame * frame
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:766
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:685
simple arithmetic expression evaluator
@ VAR_CONSUMED_SAMPLES_N
Definition: f_select.c:126
@ VAR_SELECTED_N
Definition: f_select.c:131
@ VAR_PTS
Definition: f_select.c:95
@ VAR_PICT_TYPE_S
Definition: f_select.c:116
@ VAR_POS
Definition: f_select.c:135
@ VAR_KEY
Definition: f_select.c:134
@ VAR_INTERLACE_TYPE_B
Definition: f_select.c:124
@ VAR_SAMPLES_N
Definition: f_select.c:127
@ VAR_PREV_SELECTED_N
Definition: f_select.c:132
@ VAR_TB
Definition: f_select.c:93
@ VAR_SP
Definition: f_select.c:111
@ VAR_CONCATDEC_SELECT
Definition: f_select.c:139
@ VAR_PREV_T
Definition: f_select.c:102
@ VAR_PREV_SELECTED_PTS
Definition: f_select.c:98
@ VAR_BI
Definition: f_select.c:112
@ VAR_N
Definition: f_select.c:130
@ VAR_START_T
Definition: f_select.c:101
@ VAR_PICT_TYPE_BI
Definition: f_select.c:119
@ VAR_VARS_NB
Definition: f_select.c:141
@ VAR_PICT_TYPE
Definition: f_select.c:105
@ VAR_PICT_TYPE_B
Definition: f_select.c:115
@ VAR_SI
Definition: f_select.c:110
@ VAR_PICT_TYPE_SP
Definition: f_select.c:118
@ VAR_START_PTS
Definition: f_select.c:96
@ VAR_INTERLACE_TYPE
Definition: f_select.c:121
@ VAR_PICT_TYPE_P
Definition: f_select.c:114
@ VAR_PICT_TYPE_I
Definition: f_select.c:113
@ VAR_SAMPLE_RATE
Definition: f_select.c:128
@ VAR_I
Definition: f_select.c:106
@ VAR_INTERLACE_TYPE_T
Definition: f_select.c:123
@ VAR_PREV_SELECTED_T
Definition: f_select.c:103
@ VAR_PREV_PTS
Definition: f_select.c:97
@ VAR_T
Definition: f_select.c:100
@ VAR_S
Definition: f_select.c:109
@ VAR_INTERLACE_TYPE_P
Definition: f_select.c:122
@ VAR_P
Definition: f_select.c:107
@ VAR_B
Definition: f_select.c:108
@ VAR_SCENE
Definition: f_select.c:137
@ VAR_PICT_TYPE_SI
Definition: f_select.c:117
static double get_concatdec_select(AVFrame *frame, int64_t pts)
Definition: f_select.c:306
#define INTERLACE_TYPE_B
Definition: f_select.c:206
static int config_input(AVFilterLink *inlink)
Definition: f_select.c:208
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: f_select.c:412
static double get_scene_score(AVFilterContext *ctx, AVFrame *frame)
Definition: f_select.c:273
static int request_frame(AVFilterLink *outlink)
Definition: f_select.c:425
static const char *const var_names[]
Definition: f_select.c:40
static av_cold int init(AVFilterContext *ctx)
Definition: f_select.c:174
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_select.c:432
#define INTERLACE_TYPE_T
Definition: f_select.c:205
#define DEFINE_OPTIONS(filt_name, FLAGS)
Definition: f_select.c:163
static void select_frame(AVFilterContext *ctx, AVFrame *frame)
Definition: f_select.c:328
#define INTERLACE_TYPE_P
Definition: f_select.c:204
static int64_t start_time
Definition: ffplay.c:332
a very simple circular buffer FIFO implementation
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:593
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
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:112
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
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
#define AVERROR(e)
Definition: error.h:43
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
Compute the size of an image line with format pix_fmt and width width for the plane plane.
Definition: imgutils.c:76
char av_get_picture_type_char(enum AVPictureType pict_type)
Return a single letter to describe the given picture type pict_type.
Definition: utils.c:83
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
@ AV_PICTURE_TYPE_BI
BI type.
Definition: avutil.h:280
@ AV_PICTURE_TYPE_SP
Switching Predicted.
Definition: avutil.h:279
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:275
@ AV_PICTURE_TYPE_SI
Switching Intra.
Definition: avutil.h:278
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
misc image utilities
int i
Definition: input.c:407
#define TS2D(ts)
Definition: internal.h:208
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:248
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
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 emms_c()
Definition: internal.h:54
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:309
#define isnan(x)
Definition: libm.h:340
const char * desc
Definition: libsvtav1.c:79
#define NAN
Definition: mathematics.h:64
AVOptions.
#define AV_OPT_FLAG_FILTERING_PARAM
a generic parameter which can be set by the user for filtering
Definition: opt.h:294
#define AV_OPT_FLAG_AUDIO_PARAM
Definition: opt.h:280
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:281
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2613
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:148
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
@ 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_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
@ 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_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
@ 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
ff_scene_sad_fn ff_scene_sad_get_fn(int depth)
Definition: scene_sad.c:59
Scene SAD functions.
void(* ff_scene_sad_fn)(SCENE_SAD_PARAMS)
Definition: scene_sad.h:34
var_name
Definition: setts_bsf.c:50
#define snprintf
Definition: snprintf.h:34
Describe the class of an AVClass context structure.
Definition: log.h:67
char * value
Definition: dict.h:83
Definition: eval.c:157
An instance of a filter.
Definition: avfilter.h:341
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:349
void * priv
private data for use by the filter
Definition: avfilter.h:356
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
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:102
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:384
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:411
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int width
Definition: frame.h:376
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:589
int height
Definition: frame.h:376
AVDictionary * metadata
metadata.
Definition: frame.h:604
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:470
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:465
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:401
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int do_scene_detect
1 if the expression requires scene detection variables, 0 otherwise
Definition: f_select.c:153
char * expr_str
Definition: f_select.c:146
double prev_mafd
previous MAFD (scene detect only)
Definition: f_select.c:155
int select_out
mark the selected output pad index
Definition: f_select.c:158
AVExpr * expr
Definition: f_select.c:147
int nb_outputs
Definition: f_select.c:159
double select
Definition: f_select.c:157
ptrdiff_t width[4]
Definition: f_select.c:151
ptrdiff_t height[4]
Definition: f_select.c:152
double var_values[VAR_VARS_NB]
Definition: f_select.c:148
ff_scene_sad_fn sad
Sum of the absolute difference function (scene detect only)
Definition: f_select.c:154
AVFrame * prev_picref
previous frame (scene detect only)
Definition: f_select.c:156
#define av_freep(p)
#define av_log(a,...)
int64_t duration
Definition: movenc.c:64
AVFormatContext * ctx
Definition: movenc.c:48
static int64_t pts
static av_always_inline int diff(const uint32_t a, const uint32_t b)