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  NULL
94 };
95 
96 enum var_name {
98 
103 
108 
124 
129 
133 
137 
139 #if FF_API_FRAME_PKT
140  VAR_POS,
141 #endif
142 
144 
146 
148 };
149 
150 typedef struct SelectContext {
151  const AVClass *class;
152  char *expr_str;
155  int bitdepth;
157  ptrdiff_t width[4];
158  ptrdiff_t height[4];
159  int do_scene_detect; ///< 1 if the expression requires scene detection variables, 0 otherwise
160  ff_scene_sad_fn sad; ///< Sum of the absolute difference function (scene detect only)
161  double prev_mafd; ///< previous MAFD (scene detect only)
162  AVFrame *prev_picref; ///< previous frame (scene detect only)
163  double select;
164  int select_out; ///< mark the selected output pad index
166 } SelectContext;
167 
168 #define OFFSET(x) offsetof(SelectContext, x)
169 #define DEFINE_OPTIONS(filt_name, FLAGS) \
170 static const AVOption filt_name##_options[] = { \
171  { "expr", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
172  { "e", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
173  { "outputs", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
174  { "n", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
175  { NULL } \
176 }
177 
178 static int request_frame(AVFilterLink *outlink);
179 
181 {
182  SelectContext *select = ctx->priv;
183  int i, ret;
184 
185  if ((ret = av_expr_parse(&select->expr, select->expr_str,
186  var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
187  av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n",
188  select->expr_str);
189  return ret;
190  }
191  select->do_scene_detect = !!strstr(select->expr_str, "scene");
192 
193  for (i = 0; i < select->nb_outputs; i++) {
194  AVFilterPad pad = { 0 };
195 
196  pad.name = av_asprintf("output%d", i);
197  if (!pad.name)
198  return AVERROR(ENOMEM);
199  pad.type = ctx->filter->inputs[0].type;
201  if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
202  return ret;
203  }
204 
205  return 0;
206 }
207 
208 #define INTERLACE_TYPE_P 0
209 #define INTERLACE_TYPE_T 1
210 #define INTERLACE_TYPE_B 2
211 
213 {
214  SelectContext *select = inlink->dst->priv;
216  int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) &&
217  (desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
218  desc->nb_components >= 3;
219 
220  select->bitdepth = desc->comp[0].depth;
221  select->nb_planes = is_yuv ? 1 : av_pix_fmt_count_planes(inlink->format);
222 
223  for (int plane = 0; plane < select->nb_planes; plane++) {
224  ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane);
225  int vsub = desc->log2_chroma_h;
226 
227  select->width[plane] = line_size >> (select->bitdepth > 8);
228  select->height[plane] = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;
229  }
230 
231  select->var_values[VAR_N] = 0.0;
232  select->var_values[VAR_SELECTED_N] = 0.0;
233 
234  select->var_values[VAR_TB] = av_q2d(inlink->time_base);
235 
237  select->var_values[VAR_PREV_PTS] = NAN;
240  select->var_values[VAR_PREV_T] = NAN;
241  select->var_values[VAR_START_PTS] = NAN;
242  select->var_values[VAR_START_T] = NAN;
243 
256 
260 
261  select->var_values[VAR_PICT_TYPE] = NAN;
262  select->var_values[VAR_INTERLACE_TYPE] = NAN;
263  select->var_values[VAR_SCENE] = NAN;
265  select->var_values[VAR_SAMPLES_N] = NAN;
266 
267  select->var_values[VAR_SAMPLE_RATE] =
268  inlink->type == AVMEDIA_TYPE_AUDIO ? inlink->sample_rate : NAN;
269 
270  if (CONFIG_SELECT_FILTER && select->do_scene_detect) {
271  select->sad = ff_scene_sad_get_fn(select->bitdepth == 8 ? 8 : 16);
272  if (!select->sad)
273  return AVERROR(EINVAL);
274  }
275  return 0;
276 }
277 
279 {
280  double ret = 0;
281  SelectContext *select = ctx->priv;
282  AVFrame *prev_picref = select->prev_picref;
283 
284  if (prev_picref &&
285  frame->height == prev_picref->height &&
286  frame->width == prev_picref->width) {
287  uint64_t sad = 0;
288  double mafd, diff;
289  uint64_t count = 0;
290 
291  for (int plane = 0; plane < select->nb_planes; plane++) {
292  uint64_t plane_sad;
293  select->sad(prev_picref->data[plane], prev_picref->linesize[plane],
294  frame->data[plane], frame->linesize[plane],
295  select->width[plane], select->height[plane], &plane_sad);
296  sad += plane_sad;
297  count += select->width[plane] * select->height[plane];
298  }
299 
300  mafd = (double)sad / count / (1ULL << (select->bitdepth - 8));
301  diff = fabs(mafd - select->prev_mafd);
302  ret = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
303  select->prev_mafd = mafd;
304  av_frame_free(&prev_picref);
305  }
306  select->prev_picref = av_frame_clone(frame);
307  return ret;
308 }
309 
310 static double get_concatdec_select(AVFrame *frame, int64_t pts)
311 {
312  AVDictionary *metadata = frame->metadata;
313  AVDictionaryEntry *start_time_entry = av_dict_get(metadata, "lavf.concatdec.start_time", NULL, 0);
314  AVDictionaryEntry *duration_entry = av_dict_get(metadata, "lavf.concatdec.duration", NULL, 0);
315  if (start_time_entry) {
316  int64_t start_time = strtoll(start_time_entry->value, NULL, 10);
317  if (pts >= start_time) {
318  if (duration_entry) {
319  int64_t duration = strtoll(duration_entry->value, NULL, 10);
320  if (pts < start_time + duration)
321  return -1;
322  else
323  return 0;
324  }
325  return -1;
326  }
327  return 0;
328  }
329  return NAN;
330 }
331 
333 {
334  SelectContext *select = ctx->priv;
335  AVFilterLink *inlink = ctx->inputs[0];
336  double res;
337 
338  if (isnan(select->var_values[VAR_START_PTS]))
339  select->var_values[VAR_START_PTS] = TS2D(frame->pts);
340  if (isnan(select->var_values[VAR_START_T]))
341  select->var_values[VAR_START_T] = TS2D(frame->pts) * av_q2d(inlink->time_base);
342 
343  select->var_values[VAR_N ] = inlink->frame_count_out;
344  select->var_values[VAR_PTS] = TS2D(frame->pts);
345  select->var_values[VAR_T ] = TS2D(frame->pts) * av_q2d(inlink->time_base);
346 #if FF_API_FRAME_PKT
348  select->var_values[VAR_POS] = frame->pkt_pos == -1 ? NAN : frame->pkt_pos;
350 #endif
351  select->var_values[VAR_KEY] = !!(frame->flags & AV_FRAME_FLAG_KEY);
353 
354  switch (inlink->type) {
355  case AVMEDIA_TYPE_AUDIO:
356  select->var_values[VAR_SAMPLES_N] = frame->nb_samples;
357  break;
358 
359  case AVMEDIA_TYPE_VIDEO:
360  select->var_values[VAR_INTERLACE_TYPE] =
363  select->var_values[VAR_PICT_TYPE] = frame->pict_type;
364  if (select->do_scene_detect) {
365  char buf[32];
367  // TODO: document metadata
368  snprintf(buf, sizeof(buf), "%f", select->var_values[VAR_SCENE]);
369  av_dict_set(&frame->metadata, "lavfi.scene_score", buf, 0);
370  }
371  break;
372  }
373 
374  select->select = res = av_expr_eval(select->expr, select->var_values, NULL);
375  av_log(inlink->dst, AV_LOG_DEBUG,
376  "n:%f pts:%f t:%f key:%d",
377  select->var_values[VAR_N],
378  select->var_values[VAR_PTS],
379  select->var_values[VAR_T],
380  !!(frame->flags & AV_FRAME_FLAG_KEY));
381 
382  switch (inlink->type) {
383  case AVMEDIA_TYPE_VIDEO:
384  av_log(inlink->dst, AV_LOG_DEBUG, " interlace_type:%c pict_type:%c scene:%f",
385  !(frame->flags & AV_FRAME_FLAG_INTERLACED) ? 'P' :
386  (frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? 'T' : 'B',
387  av_get_picture_type_char(frame->pict_type),
388  select->var_values[VAR_SCENE]);
389  break;
390  case AVMEDIA_TYPE_AUDIO:
391  av_log(inlink->dst, AV_LOG_DEBUG, " samples_n:%d consumed_samples_n:%f",
392  frame->nb_samples,
394  break;
395  }
396 
397  if (res == 0) {
398  select->select_out = -1; /* drop */
399  } else if (isnan(res) || res < 0) {
400  select->select_out = 0; /* first output */
401  } else {
402  select->select_out = FFMIN(ceilf(res)-1, select->nb_outputs-1); /* other outputs */
403  }
404 
405  av_log(inlink->dst, AV_LOG_DEBUG, " -> select:%f select_out:%d\n", res, select->select_out);
406 
407  if (res) {
408  select->var_values[VAR_PREV_SELECTED_N] = select->var_values[VAR_N];
410  select->var_values[VAR_PREV_SELECTED_T] = select->var_values[VAR_T];
411  select->var_values[VAR_SELECTED_N] += 1.0;
412  if (inlink->type == AVMEDIA_TYPE_AUDIO)
413  select->var_values[VAR_CONSUMED_SAMPLES_N] += frame->nb_samples;
414  }
415 
416  select->var_values[VAR_PREV_PTS] = select->var_values[VAR_PTS];
417  select->var_values[VAR_PREV_T] = select->var_values[VAR_T];
418 }
419 
421 {
422  AVFilterContext *ctx = inlink->dst;
423  SelectContext *select = ctx->priv;
424 
426  if (select->select)
427  return ff_filter_frame(ctx->outputs[select->select_out], frame);
428 
430  return 0;
431 }
432 
433 static int request_frame(AVFilterLink *outlink)
434 {
435  AVFilterLink *inlink = outlink->src->inputs[0];
436  int ret = ff_request_frame(inlink);
437  return ret;
438 }
439 
441 {
442  SelectContext *select = ctx->priv;
443 
444  av_expr_free(select->expr);
445  select->expr = NULL;
446 
447  if (select->do_scene_detect) {
448  av_frame_free(&select->prev_picref);
449  }
450 }
451 
452 #if CONFIG_ASELECT_FILTER
453 
455 AVFILTER_DEFINE_CLASS(aselect);
456 
457 static av_cold int aselect_init(AVFilterContext *ctx)
458 {
459  SelectContext *select = ctx->priv;
460  int ret;
461 
462  if ((ret = init(ctx)) < 0)
463  return ret;
464 
465  if (select->do_scene_detect) {
466  av_log(ctx, AV_LOG_ERROR, "Scene detection is ignored in aselect filter\n");
467  return AVERROR(EINVAL);
468  }
469 
470  return 0;
471 }
472 
473 static const AVFilterPad avfilter_af_aselect_inputs[] = {
474  {
475  .name = "default",
476  .type = AVMEDIA_TYPE_AUDIO,
477  .config_props = config_input,
478  .filter_frame = filter_frame,
479  },
480 };
481 
482 const AVFilter ff_af_aselect = {
483  .name = "aselect",
484  .description = NULL_IF_CONFIG_SMALL("Select audio frames to pass in output."),
485  .init = aselect_init,
486  .uninit = uninit,
487  .priv_size = sizeof(SelectContext),
488  FILTER_INPUTS(avfilter_af_aselect_inputs),
489  .priv_class = &aselect_class,
491 };
492 #endif /* CONFIG_ASELECT_FILTER */
493 
494 #if CONFIG_SELECT_FILTER
495 
496 static int query_formats(AVFilterContext *ctx)
497 {
498  SelectContext *select = ctx->priv;
499 
500  if (!select->do_scene_detect) {
502  } else {
503  static const enum AVPixelFormat pix_fmts[] = {
510  };
512  }
513 }
514 
516 AVFILTER_DEFINE_CLASS(select);
517 
518 static av_cold int select_init(AVFilterContext *ctx)
519 {
520  int ret;
521 
522  if ((ret = init(ctx)) < 0)
523  return ret;
524 
525  return 0;
526 }
527 
528 static const AVFilterPad avfilter_vf_select_inputs[] = {
529  {
530  .name = "default",
531  .type = AVMEDIA_TYPE_VIDEO,
532  .config_props = config_input,
533  .filter_frame = filter_frame,
534  },
535 };
536 
537 const AVFilter ff_vf_select = {
538  .name = "select",
539  .description = NULL_IF_CONFIG_SMALL("Select video frames to pass in output."),
540  .init = select_init,
541  .uninit = uninit,
542  .priv_size = sizeof(SelectContext),
543  .priv_class = &select_class,
544  FILTER_INPUTS(avfilter_vf_select_inputs),
547 };
548 #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:120
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:126
var_name
var_name
Definition: noise.c:47
VAR_P
@ VAR_P
Definition: f_select.c:111
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:433
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:150
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:106
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:375
get_concatdec_select
static double get_concatdec_select(AVFrame *frame, int64_t pts)
Definition: f_select.c:310
pixdesc.h
AVFrame::width
int width
Definition: frame.h:447
VAR_INTERLACE_TYPE_B
@ VAR_INTERLACE_TYPE_B
Definition: f_select.c:128
VAR_T
@ VAR_T
Definition: f_select.c:104
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_select.c:440
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:105
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:132
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:160
video.h
VAR_SCENE
@ VAR_SCENE
Definition: f_select.c:143
VAR_CONSUMED_SAMPLES_N
@ VAR_CONSUMED_SAMPLES_N
Definition: f_select.c:130
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:396
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:639
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:136
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:131
VAR_START_PTS
@ VAR_START_PTS
Definition: f_select.c:100
VAR_PICT_TYPE_P
@ VAR_PICT_TYPE_P
Definition: f_select.c:118
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:274
VAR_BI
@ VAR_BI
Definition: f_select.c:116
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:157
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:626
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:278
INTERLACE_TYPE_T
#define INTERLACE_TYPE_T
Definition: f_select.c:209
VAR_SI
@ VAR_SI
Definition: f_select.c:114
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:59
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
VAR_PREV_SELECTED_PTS
@ VAR_PREV_SELECTED_PTS
Definition: f_select.c:102
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:109
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:164
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_PREV_SELECTED_T
@ VAR_PREV_SELECTED_T
Definition: f_select.c:107
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:210
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:134
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:163
SelectContext::prev_picref
AVFrame * prev_picref
previous frame (scene detect only)
Definition: f_select.c:162
DEFINE_OPTIONS
#define DEFINE_OPTIONS(filt_name, FLAGS)
Definition: f_select.c:169
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:180
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:161
SelectContext::do_scene_detect
int do_scene_detect
1 if the expression requires scene detection variables, 0 otherwise
Definition: f_select.c:159
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:212
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:298
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:125
VAR_VARS_NB
@ VAR_VARS_NB
Definition: f_select.c:147
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:153
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:97
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
SelectContext::expr_str
char * expr_str
Definition: f_select.c:152
internal.h
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: f_select.c:420
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_OPT_FLAG_VIDEO_PARAM
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:275
SelectContext::nb_planes
int nb_planes
Definition: f_select.c:156
VAR_PICT_TYPE_SI
@ VAR_PICT_TYPE_SI
Definition: f_select.c:121
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
SelectContext::bitdepth
int bitdepth
Definition: f_select.c:155
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:634
select_frame
static void select_frame(AVFilterContext *ctx, AVFrame *frame)
Definition: f_select.c:332
VAR_B
@ VAR_B
Definition: f_select.c:112
AVFilter
Filter definition.
Definition: avfilter.h:166
VAR_PICT_TYPE_BI
@ VAR_PICT_TYPE_BI
Definition: f_select.c:123
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:138
VAR_SELECTED_N
@ VAR_SELECTED_N
Definition: f_select.c:135
SelectContext::var_values
double var_values[VAR_VARS_NB]
Definition: f_select.c:154
SelectContext::nb_outputs
int nb_outputs
Definition: f_select.c:165
AVFrame::height
int height
Definition: frame.h:447
VAR_S
@ VAR_S
Definition: f_select.c:113
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:117
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
VAR_PREV_PTS
@ VAR_PREV_PTS
Definition: f_select.c:101
avfilter.h
VAR_SP
@ VAR_SP
Definition: f_select.c:115
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:122
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:75
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:99
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:158
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:420
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:119
VAR_INTERLACE_TYPE_T
@ VAR_INTERLACE_TYPE_T
Definition: f_select.c:127
ff_vf_select
const AVFilter ff_vf_select
snprintf
#define snprintf
Definition: snprintf.h:34
VAR_I
@ VAR_I
Definition: f_select.c:110
VAR_CONCATDEC_SELECT
@ VAR_CONCATDEC_SELECT
Definition: f_select.c:145
INTERLACE_TYPE_P
#define INTERLACE_TYPE_P
Definition: f_select.c:208