FFmpeg
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 "config_components.h"
27 
28 #include "libavutil/avstring.h"
29 #include "libavutil/eval.h"
30 #include "libavutil/fifo.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 #include "avfilter.h"
36 #include "audio.h"
37 #include "formats.h"
38 #include "internal.h"
39 #include "video.h"
40 #include "scene_sad.h"
41 
42 static const char *const var_names[] = {
43  "TB", ///< timebase
44 
45  "pts", ///< original pts in the file of the frame
46  "start_pts", ///< first PTS in the stream, expressed in TB units
47  "prev_pts", ///< previous frame PTS
48  "prev_selected_pts", ///< previous selected frame PTS
49 
50  "t", ///< timestamp expressed in seconds
51  "start_t", ///< first PTS in the stream, expressed in seconds
52  "prev_t", ///< previous frame time
53  "prev_selected_t", ///< previously selected time
54 
55  "pict_type", ///< the type of picture in the movie
56  "I",
57  "P",
58  "B",
59  "S",
60  "SI",
61  "SP",
62  "BI",
63  "PICT_TYPE_I",
64  "PICT_TYPE_P",
65  "PICT_TYPE_B",
66  "PICT_TYPE_S",
67  "PICT_TYPE_SI",
68  "PICT_TYPE_SP",
69  "PICT_TYPE_BI",
70 
71  "interlace_type", ///< the frame interlace type
72  "PROGRESSIVE",
73  "TOPFIRST",
74  "BOTTOMFIRST",
75 
76  "consumed_samples_n",///< number of samples consumed by the filter (only audio)
77  "samples_n", ///< number of samples in the current frame (only audio)
78  "sample_rate", ///< sample rate (only audio)
79 
80  "n", ///< frame number (starting from zero)
81  "selected_n", ///< selected frame number (starting from zero)
82  "prev_selected_n", ///< number of the last selected frame
83 
84  "key", ///< tell if the frame is a key frame
85 #if FF_API_FRAME_PKT
86  "pos", ///< original position in the file of the frame
87 #endif
88 
89  "scene",
90 
91  "concatdec_select", ///< frame is within the interval set by the concat demuxer
92 
93  "ih", ///< ih: Represents the height of the input video frame.
94  "iw", ///< iw: Represents the width of the input video frame.
95 
96  NULL
97 };
98 
99 enum var_name {
101 
106 
111 
127 
132 
136 
140 
142 #if FF_API_FRAME_PKT
143  VAR_POS,
144 #endif
145 
147 
149 
152 
154 };
155 
156 typedef struct SelectContext {
157  const AVClass *class;
158  char *expr_str;
161  int bitdepth;
163  ptrdiff_t width[4];
164  ptrdiff_t height[4];
165  int do_scene_detect; ///< 1 if the expression requires scene detection variables, 0 otherwise
166  ff_scene_sad_fn sad; ///< Sum of the absolute difference function (scene detect only)
167  double prev_mafd; ///< previous MAFD (scene detect only)
168  AVFrame *prev_picref; ///< previous frame (scene detect only)
169  double select;
170  int select_out; ///< mark the selected output pad index
172 } SelectContext;
173 
174 #define OFFSET(x) offsetof(SelectContext, x)
175 #define DEFINE_OPTIONS(filt_name, FLAGS) \
176 static const AVOption filt_name##_options[] = { \
177  { "expr", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
178  { "e", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
179  { "outputs", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
180  { "n", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
181  { NULL } \
182 }
183 
184 static int request_frame(AVFilterLink *outlink);
185 
187 {
188  SelectContext *select = ctx->priv;
189  int i, ret;
190 
191  if ((ret = av_expr_parse(&select->expr, select->expr_str,
192  var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
193  av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n",
194  select->expr_str);
195  return ret;
196  }
197  select->do_scene_detect = !!strstr(select->expr_str, "scene");
198 
199  for (i = 0; i < select->nb_outputs; i++) {
200  AVFilterPad pad = { 0 };
201 
202  pad.name = av_asprintf("output%d", i);
203  if (!pad.name)
204  return AVERROR(ENOMEM);
205  pad.type = ctx->filter->inputs[0].type;
207  if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
208  return ret;
209  }
210 
211  return 0;
212 }
213 
214 #define INTERLACE_TYPE_P 0
215 #define INTERLACE_TYPE_T 1
216 #define INTERLACE_TYPE_B 2
217 
219 {
220  SelectContext *select = inlink->dst->priv;
222  int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) &&
223  (desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
224  desc->nb_components >= 3;
225 
226  select->bitdepth = desc->comp[0].depth;
227  select->nb_planes = is_yuv ? 1 : av_pix_fmt_count_planes(inlink->format);
228 
229  for (int plane = 0; plane < select->nb_planes; plane++) {
230  ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane);
231  int vsub = desc->log2_chroma_h;
232 
233  select->width[plane] = line_size >> (select->bitdepth > 8);
234  select->height[plane] = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;
235  }
236 
237  select->var_values[VAR_N] = 0.0;
238  select->var_values[VAR_SELECTED_N] = 0.0;
239 
240  select->var_values[VAR_TB] = av_q2d(inlink->time_base);
241 
243  select->var_values[VAR_PREV_PTS] = NAN;
246  select->var_values[VAR_PREV_T] = NAN;
247  select->var_values[VAR_START_PTS] = NAN;
248  select->var_values[VAR_START_T] = NAN;
249 
262 
266 
267  select->var_values[VAR_PICT_TYPE] = NAN;
268  select->var_values[VAR_INTERLACE_TYPE] = NAN;
269  select->var_values[VAR_SCENE] = NAN;
271  select->var_values[VAR_SAMPLES_N] = NAN;
272 
273  select->var_values[VAR_IH] = NAN;
274  select->var_values[VAR_IW] = NAN;
275 
276  select->var_values[VAR_SAMPLE_RATE] =
277  inlink->type == AVMEDIA_TYPE_AUDIO ? inlink->sample_rate : NAN;
278 
279  if (CONFIG_SELECT_FILTER && select->do_scene_detect) {
280  select->sad = ff_scene_sad_get_fn(select->bitdepth == 8 ? 8 : 16);
281  if (!select->sad)
282  return AVERROR(EINVAL);
283  }
284  return 0;
285 }
286 
288 {
289  double ret = 0;
290  SelectContext *select = ctx->priv;
291  AVFrame *prev_picref = select->prev_picref;
292 
293  if (prev_picref &&
294  frame->height == prev_picref->height &&
295  frame->width == prev_picref->width) {
296  uint64_t sad = 0;
297  double mafd, diff;
298  uint64_t count = 0;
299 
300  for (int plane = 0; plane < select->nb_planes; plane++) {
301  uint64_t plane_sad;
302  select->sad(prev_picref->data[plane], prev_picref->linesize[plane],
303  frame->data[plane], frame->linesize[plane],
304  select->width[plane], select->height[plane], &plane_sad);
305  sad += plane_sad;
306  count += select->width[plane] * select->height[plane];
307  }
308 
309  mafd = (double)sad / count / (1ULL << (select->bitdepth - 8));
310  diff = fabs(mafd - select->prev_mafd);
311  ret = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
312  select->prev_mafd = mafd;
313  av_frame_free(&prev_picref);
314  }
315  select->prev_picref = av_frame_clone(frame);
316  return ret;
317 }
318 
320 {
321  AVDictionary *metadata = frame->metadata;
322  AVDictionaryEntry *start_time_entry = av_dict_get(metadata, "lavf.concatdec.start_time", NULL, 0);
323  AVDictionaryEntry *duration_entry = av_dict_get(metadata, "lavf.concatdec.duration", NULL, 0);
324  if (start_time_entry) {
325  int64_t start_time = strtoll(start_time_entry->value, NULL, 10);
326  if (pts >= start_time) {
327  if (duration_entry) {
328  int64_t duration = strtoll(duration_entry->value, NULL, 10);
329  if (pts < start_time + duration)
330  return -1;
331  else
332  return 0;
333  }
334  return -1;
335  }
336  return 0;
337  }
338  return NAN;
339 }
340 
342 {
343  SelectContext *select = ctx->priv;
344  AVFilterLink *inlink = ctx->inputs[0];
345  double res;
346 
347  if (isnan(select->var_values[VAR_START_PTS]))
348  select->var_values[VAR_START_PTS] = TS2D(frame->pts);
349  if (isnan(select->var_values[VAR_START_T]))
350  select->var_values[VAR_START_T] = TS2D(frame->pts) * av_q2d(inlink->time_base);
351 
352  select->var_values[VAR_N ] = inlink->frame_count_out;
353  select->var_values[VAR_PTS] = TS2D(frame->pts);
354  select->var_values[VAR_T ] = TS2D(frame->pts) * av_q2d(inlink->time_base);
355 #if FF_API_FRAME_PKT
357  select->var_values[VAR_POS] = frame->pkt_pos == -1 ? NAN : frame->pkt_pos;
359 #endif
360  select->var_values[VAR_KEY] = !!(frame->flags & AV_FRAME_FLAG_KEY);
362 
363  switch (inlink->type) {
364  case AVMEDIA_TYPE_AUDIO:
365  select->var_values[VAR_SAMPLES_N] = frame->nb_samples;
366  break;
367 
368  case AVMEDIA_TYPE_VIDEO:
369  select->var_values[VAR_IH] = frame->height;
370  select->var_values[VAR_IW] = frame->width;
371 
372  select->var_values[VAR_INTERLACE_TYPE] =
375  select->var_values[VAR_PICT_TYPE] = frame->pict_type;
376  if (select->do_scene_detect) {
377  char buf[32];
379  // TODO: document metadata
380  snprintf(buf, sizeof(buf), "%f", select->var_values[VAR_SCENE]);
381  av_dict_set(&frame->metadata, "lavfi.scene_score", buf, 0);
382  }
383  break;
384  }
385 
386  select->select = res = av_expr_eval(select->expr, select->var_values, NULL);
387  av_log(inlink->dst, AV_LOG_DEBUG,
388  "n:%f pts:%f t:%f key:%d",
389  select->var_values[VAR_N],
390  select->var_values[VAR_PTS],
391  select->var_values[VAR_T],
392  !!(frame->flags & AV_FRAME_FLAG_KEY));
393 
394  switch (inlink->type) {
395  case AVMEDIA_TYPE_VIDEO:
396  av_log(inlink->dst, AV_LOG_DEBUG, " interlace_type:%c pict_type:%c scene:%f",
397  !(frame->flags & AV_FRAME_FLAG_INTERLACED) ? 'P' :
398  (frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? 'T' : 'B',
399  av_get_picture_type_char(frame->pict_type),
400  select->var_values[VAR_SCENE]);
401  break;
402  case AVMEDIA_TYPE_AUDIO:
403  av_log(inlink->dst, AV_LOG_DEBUG, " samples_n:%d consumed_samples_n:%f",
404  frame->nb_samples,
406  break;
407  }
408 
409  if (res == 0) {
410  select->select_out = -1; /* drop */
411  } else if (isnan(res) || res < 0) {
412  select->select_out = 0; /* first output */
413  } else {
414  select->select_out = FFMIN(ceilf(res)-1, select->nb_outputs-1); /* other outputs */
415  }
416 
417  av_log(inlink->dst, AV_LOG_DEBUG, " -> select:%f select_out:%d\n", res, select->select_out);
418 
419  if (res) {
420  select->var_values[VAR_PREV_SELECTED_N] = select->var_values[VAR_N];
422  select->var_values[VAR_PREV_SELECTED_T] = select->var_values[VAR_T];
423  select->var_values[VAR_SELECTED_N] += 1.0;
424  if (inlink->type == AVMEDIA_TYPE_AUDIO)
425  select->var_values[VAR_CONSUMED_SAMPLES_N] += frame->nb_samples;
426  }
427 
428  select->var_values[VAR_PREV_PTS] = select->var_values[VAR_PTS];
429  select->var_values[VAR_PREV_T] = select->var_values[VAR_T];
430 }
431 
433 {
434  AVFilterContext *ctx = inlink->dst;
435  SelectContext *select = ctx->priv;
436 
438  if (select->select)
439  return ff_filter_frame(ctx->outputs[select->select_out], frame);
440 
442  return 0;
443 }
444 
445 static int request_frame(AVFilterLink *outlink)
446 {
447  AVFilterLink *inlink = outlink->src->inputs[0];
448  int ret = ff_request_frame(inlink);
449  return ret;
450 }
451 
453 {
454  SelectContext *select = ctx->priv;
455 
456  av_expr_free(select->expr);
457  select->expr = NULL;
458 
459  if (select->do_scene_detect) {
460  av_frame_free(&select->prev_picref);
461  }
462 }
463 
464 #if CONFIG_ASELECT_FILTER
465 
467 AVFILTER_DEFINE_CLASS(aselect);
468 
469 static av_cold int aselect_init(AVFilterContext *ctx)
470 {
471  SelectContext *select = ctx->priv;
472  int ret;
473 
474  if ((ret = init(ctx)) < 0)
475  return ret;
476 
477  if (select->do_scene_detect) {
478  av_log(ctx, AV_LOG_ERROR, "Scene detection is ignored in aselect filter\n");
479  return AVERROR(EINVAL);
480  }
481 
482  return 0;
483 }
484 
485 static const AVFilterPad avfilter_af_aselect_inputs[] = {
486  {
487  .name = "default",
488  .type = AVMEDIA_TYPE_AUDIO,
489  .config_props = config_input,
490  .filter_frame = filter_frame,
491  },
492 };
493 
494 const AVFilter ff_af_aselect = {
495  .name = "aselect",
496  .description = NULL_IF_CONFIG_SMALL("Select audio frames to pass in output."),
497  .init = aselect_init,
498  .uninit = uninit,
499  .priv_size = sizeof(SelectContext),
500  FILTER_INPUTS(avfilter_af_aselect_inputs),
501  .priv_class = &aselect_class,
503 };
504 #endif /* CONFIG_ASELECT_FILTER */
505 
506 #if CONFIG_SELECT_FILTER
507 
508 static int query_formats(AVFilterContext *ctx)
509 {
510  SelectContext *select = ctx->priv;
511 
512  if (!select->do_scene_detect) {
514  } else {
515  static const enum AVPixelFormat pix_fmts[] = {
522  };
524  }
525 }
526 
528 AVFILTER_DEFINE_CLASS(select);
529 
530 static av_cold int select_init(AVFilterContext *ctx)
531 {
532  int ret;
533 
534  if ((ret = init(ctx)) < 0)
535  return ret;
536 
537  return 0;
538 }
539 
540 static const AVFilterPad avfilter_vf_select_inputs[] = {
541  {
542  .name = "default",
543  .type = AVMEDIA_TYPE_VIDEO,
544  .config_props = config_input,
545  .filter_frame = filter_frame,
546  },
547 };
548 
549 const AVFilter ff_vf_select = {
550  .name = "select",
551  .description = NULL_IF_CONFIG_SMALL("Select video frames to pass in output."),
552  .init = select_init,
553  .uninit = uninit,
554  .priv_size = sizeof(SelectContext),
555  .priv_class = &select_class,
556  FILTER_INPUTS(avfilter_vf_select_inputs),
559 };
560 #endif /* CONFIG_SELECT_FILTER */
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
VAR_PICT_TYPE_S
@ VAR_PICT_TYPE_S
Definition: f_select.c:123
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
VAR_INTERLACE_TYPE_P
@ VAR_INTERLACE_TYPE_P
Definition: f_select.c:129
var_name
var_name
Definition: noise.c:47
VAR_P
@ VAR_P
Definition: f_select.c:114
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1015
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2965
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: f_select.c:445
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:264
SelectContext
Definition: f_select.c:156
int64_t
long long int64_t
Definition: coverity.c:34
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:115
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:160
VAR_PREV_T
@ VAR_PREV_T
Definition: f_select.c:109
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
get_concatdec_select
static double get_concatdec_select(AVFrame *frame, int64_t pts)
Definition: f_select.c:319
pixdesc.h
AVFrame::width
int width
Definition: frame.h:446
VAR_INTERLACE_TYPE_B
@ VAR_INTERLACE_TYPE_B
Definition: f_select.c:131
VAR_T
@ VAR_T
Definition: f_select.c:107
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_select.c:452
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:478
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:463
VAR_START_T
@ VAR_START_T
Definition: f_select.c:108
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:76
AV_PIX_FMT_BGRA
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:102
AVDictionary
Definition: dict.c:34
VAR_SAMPLE_RATE
@ VAR_SAMPLE_RATE
Definition: f_select.c:135
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
SelectContext::sad
ff_scene_sad_fn sad
Sum of the absolute difference function (scene detect only)
Definition: f_select.c:166
video.h
VAR_SCENE
@ VAR_SCENE
Definition: f_select.c:146
VAR_CONSUMED_SAMPLES_N
@ VAR_CONSUMED_SAMPLES_N
Definition: f_select.c:133
ceilf
static __device__ float ceilf(float a)
Definition: cuda_runtime.h:175
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:395
AV_FRAME_FLAG_TOP_FIELD_FIRST
#define AV_FRAME_FLAG_TOP_FIELD_FIRST
A flag to mark frames where the top field is displayed first if the content is interlaced.
Definition: frame.h:638
formats.h
av_expr_parse
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:710
VAR_PREV_SELECTED_N
@ VAR_PREV_SELECTED_N
Definition: f_select.c:139
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3005
fifo.h
VAR_SAMPLES_N
@ VAR_SAMPLES_N
Definition: f_select.c:134
VAR_START_PTS
@ VAR_START_PTS
Definition: f_select.c:103
VAR_PICT_TYPE_P
@ VAR_PICT_TYPE_P
Definition: f_select.c:121
pts
static int64_t pts
Definition: transcode_aac.c:644
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:358
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
AV_OPT_FLAG_AUDIO_PARAM
#define AV_OPT_FLAG_AUDIO_PARAM
Definition: opt.h:285
VAR_BI
@ VAR_BI
Definition: f_select.c:119
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
SelectContext::width
ptrdiff_t width[4]
Definition: f_select.c:163
AVFilterPad::request_frame
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:97
av_cold
#define av_cold
Definition: attributes.h:90
AV_FRAME_FLAG_KEY
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
Definition: frame.h:625
duration
int64_t duration
Definition: movenc.c:65
av_dict_get
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:62
AV_PIX_FMT_YUVJ422P
@ 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:86
get_scene_score
static double get_scene_score(AVFilterContext *ctx, AVFrame *frame)
Definition: f_select.c:287
INTERLACE_TYPE_T
#define INTERLACE_TYPE_T
Definition: f_select.c:215
VAR_SI
@ VAR_SI
Definition: f_select.c:117
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:60
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
VAR_PREV_SELECTED_PTS
@ VAR_PREV_SELECTED_PTS
Definition: f_select.c:105
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
ff_set_common_formats_from_list
int ff_set_common_formats_from_list(AVFilterContext *ctx, const int *fmts)
Equivalent to ff_set_common_formats(ctx, ff_make_format_list(fmts))
Definition: formats.c:874
VAR_PICT_TYPE
@ VAR_PICT_TYPE
Definition: f_select.c:112
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:304
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ctx
AVFormatContext * ctx
Definition: movenc.c:49
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:792
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:593
av_rescale_q
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
AVExpr
Definition: eval.c:158
SelectContext::select_out
int select_out
mark the selected output pad index
Definition: f_select.c:170
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:73
VAR_IW
@ VAR_IW
Definition: f_select.c:151
VAR_PREV_SELECTED_T
@ VAR_PREV_SELECTED_T
Definition: f_select.c:110
NAN
#define NAN
Definition: mathematics.h:115
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:182
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:100
INTERLACE_TYPE_B
#define INTERLACE_TYPE_B
Definition: f_select.c:216
ff_scene_sad_get_fn
ff_scene_sad_fn ff_scene_sad_get_fn(int depth)
Definition: scene_sad.c:59
VAR_N
@ VAR_N
Definition: f_select.c:137
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
fabs
static __device__ float fabs(float a)
Definition: cuda_runtime.h:182
TS2D
#define TS2D(ts)
Definition: internal.h:258
NULL
#define NULL
Definition: coverity.c:32
VAR_POS
@ VAR_POS
Definition: noise.c:56
ff_af_aselect
const AVFilter ff_af_aselect
isnan
#define isnan(x)
Definition: libm.h:340
AV_PIX_FMT_YUVJ420P
@ 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:85
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:415
AV_PICTURE_TYPE_SI
@ AV_PICTURE_TYPE_SI
Switching Intra.
Definition: avutil.h:283
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
SelectContext::select
double select
Definition: f_select.c:169
SelectContext::prev_picref
AVFrame * prev_picref
previous frame (scene detect only)
Definition: f_select.c:168
DEFINE_OPTIONS
#define DEFINE_OPTIONS(filt_name, FLAGS)
Definition: f_select.c:175
double
double
Definition: af_crystalizer.c:131
av_clipf
av_clipf
Definition: af_crystalizer.c:121
init
static av_cold int init(AVFilterContext *ctx)
Definition: f_select.c:186
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:81
AV_PICTURE_TYPE_SP
@ AV_PICTURE_TYPE_SP
Switching Predicted.
Definition: avutil.h:284
AV_PIX_FMT_ABGR
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:101
SelectContext::prev_mafd
double prev_mafd
previous MAFD (scene detect only)
Definition: f_select.c:167
SelectContext::do_scene_detect
int do_scene_detect
1 if the expression requires scene detection variables, 0 otherwise
Definition: f_select.c:165
scene_sad.h
AVFILTER_FLAG_DYNAMIC_OUTPUTS
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:112
config_input
static int config_input(AVFilterLink *inlink)
Definition: f_select.c:218
eval.h
AV_OPT_FLAG_FILTERING_PARAM
#define AV_OPT_FLAG_FILTERING_PARAM
A generic parameter which can be set by the user for filtering.
Definition: opt.h:309
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:75
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:94
ff_default_query_formats
int ff_default_query_formats(AVFilterContext *ctx)
Sets all remaining unset filter lists for all inputs/outputs to their corresponding ff_all_*() lists.
Definition: formats.c:879
AV_PIX_FMT_FLAG_RGB
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:136
start_time
static int64_t start_time
Definition: ffplay.c:326
VAR_INTERLACE_TYPE
@ VAR_INTERLACE_TYPE
Definition: f_select.c:128
VAR_VARS_NB
@ VAR_VARS_NB
Definition: f_select.c:153
ff_scene_sad_fn
void(* ff_scene_sad_fn)(SCENE_SAD_PARAMS)
Definition: scene_sad.h:34
var_names
static const char *const var_names[]
Definition: f_select.c:42
diff
static av_always_inline int diff(const struct color_info *a, const struct color_info *b, const int trans_thresh)
Definition: vf_paletteuse.c:165
SelectContext::expr
AVExpr * expr
Definition: f_select.c:159
VAR_IH
@ VAR_IH
Definition: f_select.c:150
internal.h
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:323
av_image_get_linesize
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
av_get_picture_type_char
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:40
VAR_TB
@ VAR_TB
Definition: f_select.c:100
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
SelectContext::expr_str
char * expr_str
Definition: f_select.c:158
internal.h
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: f_select.c:432
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_OPT_FLAG_VIDEO_PARAM
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:286
SelectContext::nb_planes
int nb_planes
Definition: f_select.c:162
VAR_PICT_TYPE_SI
@ VAR_PICT_TYPE_SI
Definition: f_select.c:124
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
SelectContext::bitdepth
int bitdepth
Definition: f_select.c:161
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:633
select_frame
static void select_frame(AVFilterContext *ctx, AVFrame *frame)
Definition: f_select.c:341
VAR_B
@ VAR_B
Definition: f_select.c:115
AVFilter
Filter definition.
Definition: avfilter.h:166
VAR_PICT_TYPE_BI
@ VAR_PICT_TYPE_BI
Definition: f_select.c:126
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:44
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
VAR_KEY
@ VAR_KEY
Definition: f_select.c:141
VAR_SELECTED_N
@ VAR_SELECTED_N
Definition: f_select.c:138
SelectContext::var_values
double var_values[VAR_VARS_NB]
Definition: f_select.c:160
SelectContext::nb_outputs
int nb_outputs
Definition: f_select.c:171
AVFrame::height
int height
Definition: frame.h:446
VAR_S
@ VAR_S
Definition: f_select.c:116
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:281
VAR_PICT_TYPE_I
@ VAR_PICT_TYPE_I
Definition: f_select.c:120
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
VAR_PREV_PTS
@ VAR_PREV_PTS
Definition: f_select.c:104
avfilter.h
VAR_SP
@ VAR_SP
Definition: f_select.c:118
AVFILTER_FLAG_METADATA_ONLY
#define AVFILTER_FLAG_METADATA_ONLY
The filter is a "metadata" filter - it does not modify the frame data in any way.
Definition: avfilter.h:133
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:132
VAR_PICT_TYPE_SP
@ VAR_PICT_TYPE_SP
Definition: f_select.c:125
AVFilterContext
An instance of a filter.
Definition: avfilter.h:407
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
desc
const char * desc
Definition: libsvtav1.c:79
AV_PICTURE_TYPE_P
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:280
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:77
audio.h
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AVDictionaryEntry
Definition: dict.h:89
VAR_PTS
@ VAR_PTS
Definition: f_select.c:102
ff_append_outpad_free_name
int ff_append_outpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:143
av_dict_set
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:88
AV_PICTURE_TYPE_BI
@ AV_PICTURE_TYPE_BI
BI type.
Definition: avutil.h:285
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:246
SelectContext::height
ptrdiff_t height[4]
Definition: f_select.c:164
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:419
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVDictionaryEntry::value
char * value
Definition: dict.h:91
avstring.h
VAR_PICT_TYPE_B
@ VAR_PICT_TYPE_B
Definition: f_select.c:122
VAR_INTERLACE_TYPE_T
@ VAR_INTERLACE_TYPE_T
Definition: f_select.c:130
ff_vf_select
const AVFilter ff_vf_select
snprintf
#define snprintf
Definition: snprintf.h:34
VAR_I
@ VAR_I
Definition: f_select.c:113
VAR_CONCATDEC_SELECT
@ VAR_CONCATDEC_SELECT
Definition: f_select.c:148
INTERLACE_TYPE_P
#define INTERLACE_TYPE_P
Definition: f_select.c:214