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  "pos", ///< original position in the file of the frame
86 
87  "scene",
88 
89  "concatdec_select", ///< frame is within the interval set by the concat demuxer
90 
91  NULL
92 };
93 
94 enum var_name {
96 
101 
106 
122 
127 
131 
135 
137 #if FF_API_FRAME_PKT
138  VAR_POS,
139 #endif
140 
142 
144 
146 };
147 
148 typedef struct SelectContext {
149  const AVClass *class;
150  char *expr_str;
153  int bitdepth;
155  ptrdiff_t width[4];
156  ptrdiff_t height[4];
157  int do_scene_detect; ///< 1 if the expression requires scene detection variables, 0 otherwise
158  ff_scene_sad_fn sad; ///< Sum of the absolute difference function (scene detect only)
159  double prev_mafd; ///< previous MAFD (scene detect only)
160  AVFrame *prev_picref; ///< previous frame (scene detect only)
161  double select;
162  int select_out; ///< mark the selected output pad index
164 } SelectContext;
165 
166 #define OFFSET(x) offsetof(SelectContext, x)
167 #define DEFINE_OPTIONS(filt_name, FLAGS) \
168 static const AVOption filt_name##_options[] = { \
169  { "expr", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
170  { "e", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
171  { "outputs", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
172  { "n", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
173  { NULL } \
174 }
175 
176 static int request_frame(AVFilterLink *outlink);
177 
179 {
180  SelectContext *select = ctx->priv;
181  int i, ret;
182 
183  if ((ret = av_expr_parse(&select->expr, select->expr_str,
184  var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
185  av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n",
186  select->expr_str);
187  return ret;
188  }
189  select->do_scene_detect = !!strstr(select->expr_str, "scene");
190 
191  for (i = 0; i < select->nb_outputs; i++) {
192  AVFilterPad pad = { 0 };
193 
194  pad.name = av_asprintf("output%d", i);
195  if (!pad.name)
196  return AVERROR(ENOMEM);
197  pad.type = ctx->filter->inputs[0].type;
199  if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
200  return ret;
201  }
202 
203  return 0;
204 }
205 
206 #define INTERLACE_TYPE_P 0
207 #define INTERLACE_TYPE_T 1
208 #define INTERLACE_TYPE_B 2
209 
211 {
212  SelectContext *select = inlink->dst->priv;
214  int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) &&
215  (desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
216  desc->nb_components >= 3;
217 
218  select->bitdepth = desc->comp[0].depth;
219  select->nb_planes = is_yuv ? 1 : av_pix_fmt_count_planes(inlink->format);
220 
221  for (int plane = 0; plane < select->nb_planes; plane++) {
222  ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane);
223  int vsub = desc->log2_chroma_h;
224 
225  select->width[plane] = line_size >> (select->bitdepth > 8);
226  select->height[plane] = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;
227  }
228 
229  select->var_values[VAR_N] = 0.0;
230  select->var_values[VAR_SELECTED_N] = 0.0;
231 
232  select->var_values[VAR_TB] = av_q2d(inlink->time_base);
233 
234  select->var_values[VAR_PREV_PTS] = NAN;
237  select->var_values[VAR_PREV_T] = NAN;
238  select->var_values[VAR_START_PTS] = NAN;
239  select->var_values[VAR_START_T] = NAN;
240 
253 
257 
258  select->var_values[VAR_PICT_TYPE] = NAN;
259  select->var_values[VAR_INTERLACE_TYPE] = NAN;
260  select->var_values[VAR_SCENE] = NAN;
262  select->var_values[VAR_SAMPLES_N] = NAN;
263 
264  select->var_values[VAR_SAMPLE_RATE] =
265  inlink->type == AVMEDIA_TYPE_AUDIO ? inlink->sample_rate : NAN;
266 
267  if (CONFIG_SELECT_FILTER && select->do_scene_detect) {
268  select->sad = ff_scene_sad_get_fn(select->bitdepth == 8 ? 8 : 16);
269  if (!select->sad)
270  return AVERROR(EINVAL);
271  }
272  return 0;
273 }
274 
276 {
277  double ret = 0;
278  SelectContext *select = ctx->priv;
279  AVFrame *prev_picref = select->prev_picref;
280 
281  if (prev_picref &&
282  frame->height == prev_picref->height &&
283  frame->width == prev_picref->width) {
284  uint64_t sad = 0;
285  double mafd, diff;
286  uint64_t count = 0;
287 
288  for (int plane = 0; plane < select->nb_planes; plane++) {
289  uint64_t plane_sad;
290  select->sad(prev_picref->data[plane], prev_picref->linesize[plane],
291  frame->data[plane], frame->linesize[plane],
292  select->width[plane], select->height[plane], &plane_sad);
293  sad += plane_sad;
294  count += select->width[plane] * select->height[plane];
295  }
296 
297  emms_c();
298  mafd = (double)sad / count / (1ULL << (select->bitdepth - 8));
299  diff = fabs(mafd - select->prev_mafd);
300  ret = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
301  select->prev_mafd = mafd;
302  av_frame_free(&prev_picref);
303  }
304  select->prev_picref = av_frame_clone(frame);
305  return ret;
306 }
307 
308 static double get_concatdec_select(AVFrame *frame, int64_t pts)
309 {
310  AVDictionary *metadata = frame->metadata;
311  AVDictionaryEntry *start_time_entry = av_dict_get(metadata, "lavf.concatdec.start_time", NULL, 0);
312  AVDictionaryEntry *duration_entry = av_dict_get(metadata, "lavf.concatdec.duration", NULL, 0);
313  if (start_time_entry) {
314  int64_t start_time = strtoll(start_time_entry->value, NULL, 10);
315  if (pts >= start_time) {
316  if (duration_entry) {
317  int64_t duration = strtoll(duration_entry->value, NULL, 10);
318  if (pts < start_time + duration)
319  return -1;
320  else
321  return 0;
322  }
323  return -1;
324  }
325  return 0;
326  }
327  return NAN;
328 }
329 
331 {
332  SelectContext *select = ctx->priv;
333  AVFilterLink *inlink = ctx->inputs[0];
334  double res;
335 
336  if (isnan(select->var_values[VAR_START_PTS]))
337  select->var_values[VAR_START_PTS] = TS2D(frame->pts);
338  if (isnan(select->var_values[VAR_START_T]))
339  select->var_values[VAR_START_T] = TS2D(frame->pts) * av_q2d(inlink->time_base);
340 
341  select->var_values[VAR_N ] = inlink->frame_count_out;
342  select->var_values[VAR_PTS] = TS2D(frame->pts);
343  select->var_values[VAR_T ] = TS2D(frame->pts) * av_q2d(inlink->time_base);
344 #if FF_API_FRAME_PKT
346  select->var_values[VAR_POS] = frame->pkt_pos == -1 ? NAN : frame->pkt_pos;
348 #endif
349  select->var_values[VAR_KEY] = !!(frame->flags & AV_FRAME_FLAG_KEY);
351 
352  switch (inlink->type) {
353  case AVMEDIA_TYPE_AUDIO:
354  select->var_values[VAR_SAMPLES_N] = frame->nb_samples;
355  break;
356 
357  case AVMEDIA_TYPE_VIDEO:
358  select->var_values[VAR_INTERLACE_TYPE] =
361  select->var_values[VAR_PICT_TYPE] = frame->pict_type;
362  if (select->do_scene_detect) {
363  char buf[32];
365  // TODO: document metadata
366  snprintf(buf, sizeof(buf), "%f", select->var_values[VAR_SCENE]);
367  av_dict_set(&frame->metadata, "lavfi.scene_score", buf, 0);
368  }
369  break;
370  }
371 
372  select->select = res = av_expr_eval(select->expr, select->var_values, NULL);
373  av_log(inlink->dst, AV_LOG_DEBUG,
374  "n:%f pts:%f t:%f key:%d",
375  select->var_values[VAR_N],
376  select->var_values[VAR_PTS],
377  select->var_values[VAR_T],
378  !!(frame->flags & AV_FRAME_FLAG_KEY));
379 
380  switch (inlink->type) {
381  case AVMEDIA_TYPE_VIDEO:
382  av_log(inlink->dst, AV_LOG_DEBUG, " interlace_type:%c pict_type:%c scene:%f",
383  !(frame->flags & AV_FRAME_FLAG_INTERLACED) ? 'P' :
384  (frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? 'T' : 'B',
385  av_get_picture_type_char(frame->pict_type),
386  select->var_values[VAR_SCENE]);
387  break;
388  case AVMEDIA_TYPE_AUDIO:
389  av_log(inlink->dst, AV_LOG_DEBUG, " samples_n:%d consumed_samples_n:%f",
390  frame->nb_samples,
392  break;
393  }
394 
395  if (res == 0) {
396  select->select_out = -1; /* drop */
397  } else if (isnan(res) || res < 0) {
398  select->select_out = 0; /* first output */
399  } else {
400  select->select_out = FFMIN(ceilf(res)-1, select->nb_outputs-1); /* other outputs */
401  }
402 
403  av_log(inlink->dst, AV_LOG_DEBUG, " -> select:%f select_out:%d\n", res, select->select_out);
404 
405  if (res) {
406  select->var_values[VAR_PREV_SELECTED_N] = select->var_values[VAR_N];
408  select->var_values[VAR_PREV_SELECTED_T] = select->var_values[VAR_T];
409  select->var_values[VAR_SELECTED_N] += 1.0;
410  if (inlink->type == AVMEDIA_TYPE_AUDIO)
411  select->var_values[VAR_CONSUMED_SAMPLES_N] += frame->nb_samples;
412  }
413 
414  select->var_values[VAR_PREV_PTS] = select->var_values[VAR_PTS];
415  select->var_values[VAR_PREV_T] = select->var_values[VAR_T];
416 }
417 
419 {
420  AVFilterContext *ctx = inlink->dst;
421  SelectContext *select = ctx->priv;
422 
424  if (select->select)
425  return ff_filter_frame(ctx->outputs[select->select_out], frame);
426 
428  return 0;
429 }
430 
431 static int request_frame(AVFilterLink *outlink)
432 {
433  AVFilterLink *inlink = outlink->src->inputs[0];
434  int ret = ff_request_frame(inlink);
435  return ret;
436 }
437 
439 {
440  SelectContext *select = ctx->priv;
441 
442  av_expr_free(select->expr);
443  select->expr = NULL;
444 
445  if (select->do_scene_detect) {
446  av_frame_free(&select->prev_picref);
447  }
448 }
449 
450 #if CONFIG_ASELECT_FILTER
451 
453 AVFILTER_DEFINE_CLASS(aselect);
454 
455 static av_cold int aselect_init(AVFilterContext *ctx)
456 {
457  SelectContext *select = ctx->priv;
458  int ret;
459 
460  if ((ret = init(ctx)) < 0)
461  return ret;
462 
463  if (select->do_scene_detect) {
464  av_log(ctx, AV_LOG_ERROR, "Scene detection is ignored in aselect filter\n");
465  return AVERROR(EINVAL);
466  }
467 
468  return 0;
469 }
470 
471 static const AVFilterPad avfilter_af_aselect_inputs[] = {
472  {
473  .name = "default",
474  .type = AVMEDIA_TYPE_AUDIO,
475  .config_props = config_input,
476  .filter_frame = filter_frame,
477  },
478 };
479 
480 const AVFilter ff_af_aselect = {
481  .name = "aselect",
482  .description = NULL_IF_CONFIG_SMALL("Select audio frames to pass in output."),
483  .init = aselect_init,
484  .uninit = uninit,
485  .priv_size = sizeof(SelectContext),
486  FILTER_INPUTS(avfilter_af_aselect_inputs),
487  .priv_class = &aselect_class,
489 };
490 #endif /* CONFIG_ASELECT_FILTER */
491 
492 #if CONFIG_SELECT_FILTER
493 
494 static int query_formats(AVFilterContext *ctx)
495 {
496  SelectContext *select = ctx->priv;
497 
498  if (!select->do_scene_detect) {
500  } else {
501  static const enum AVPixelFormat pix_fmts[] = {
508  };
510  }
511 }
512 
514 AVFILTER_DEFINE_CLASS(select);
515 
516 static av_cold int select_init(AVFilterContext *ctx)
517 {
518  int ret;
519 
520  if ((ret = init(ctx)) < 0)
521  return ret;
522 
523  return 0;
524 }
525 
526 static const AVFilterPad avfilter_vf_select_inputs[] = {
527  {
528  .name = "default",
529  .type = AVMEDIA_TYPE_VIDEO,
530  .config_props = config_input,
531  .filter_frame = filter_frame,
532  },
533 };
534 
535 const AVFilter ff_vf_select = {
536  .name = "select",
537  .description = NULL_IF_CONFIG_SMALL("Select video frames to pass in output."),
538  .init = select_init,
539  .uninit = uninit,
540  .priv_size = sizeof(SelectContext),
541  .priv_class = &select_class,
542  FILTER_INPUTS(avfilter_vf_select_inputs),
545 };
546 #endif /* CONFIG_SELECT_FILTER */
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
VAR_PICT_TYPE_S
@ VAR_PICT_TYPE_S
Definition: f_select.c:118
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
AV_OPT_FLAG_VIDEO_PARAM
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:284
VAR_INTERLACE_TYPE_P
@ VAR_INTERLACE_TYPE_P
Definition: f_select.c:124
VAR_P
@ VAR_P
Definition: f_select.c:109
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:971
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2936
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: f_select.c:431
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
SelectContext
Definition: f_select.c:148
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:116
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:100
VAR_PREV_T
@ VAR_PREV_T
Definition: f_select.c:104
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:330
get_concatdec_select
static double get_concatdec_select(AVFrame *frame, int64_t pts)
Definition: f_select.c:308
pixdesc.h
AVFrame::width
int width
Definition: frame.h:402
VAR_INTERLACE_TYPE_B
@ VAR_INTERLACE_TYPE_B
Definition: f_select.c:126
VAR_T
@ VAR_T
Definition: f_select.c:102
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:171
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_select.c:438
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:465
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:415
VAR_START_T
@ VAR_START_T
Definition: f_select.c:103
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
AV_PIX_FMT_BGRA
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
AVDictionary
Definition: dict.c:32
VAR_SAMPLE_RATE
@ VAR_SAMPLE_RATE
Definition: f_select.c:130
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:158
video.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:297
VAR_SCENE
@ VAR_SCENE
Definition: f_select.c:141
VAR_CONSUMED_SAMPLES_N
@ VAR_CONSUMED_SAMPLES_N
Definition: f_select.c:128
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:351
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:631
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:685
VAR_PREV_SELECTED_N
@ VAR_PREV_SELECTED_N
Definition: f_select.c:134
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2976
fifo.h
VAR_SAMPLES_N
@ VAR_SAMPLES_N
Definition: f_select.c:129
VAR_START_PTS
@ VAR_START_PTS
Definition: f_select.c:98
VAR_PICT_TYPE_P
@ VAR_PICT_TYPE_P
Definition: f_select.c:116
pts
static int64_t pts
Definition: transcode_aac.c:643
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
VAR_BI
@ VAR_BI
Definition: f_select.c:114
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:155
AVFilterPad::request_frame
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:113
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:618
duration
int64_t duration
Definition: movenc.c:64
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:60
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:79
emms_c
#define emms_c()
Definition: internal.h:51
get_scene_score
static double get_scene_score(AVFilterContext *ctx, AVFrame *frame)
Definition: f_select.c:275
INTERLACE_TYPE_T
#define INTERLACE_TYPE_T
Definition: f_select.c:207
VAR_SI
@ VAR_SI
Definition: f_select.c:112
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:50
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
VAR_PREV_SELECTED_PTS
@ VAR_PREV_SELECTED_PTS
Definition: f_select.c:100
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:776
VAR_PICT_TYPE
@ VAR_PICT_TYPE
Definition: f_select.c:107
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:297
var_name
var_name
Definition: noise_bsf.c:46
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:48
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:766
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:609
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:157
SelectContext::select_out
int select_out
mark the selected output pad index
Definition: f_select.c:162
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:66
VAR_PREV_SELECTED_T
@ VAR_PREV_SELECTED_T
Definition: f_select.c:105
NAN
#define NAN
Definition: mathematics.h:115
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:194
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
AV_OPT_FLAG_AUDIO_PARAM
#define AV_OPT_FLAG_AUDIO_PARAM
Definition: opt.h:283
INTERLACE_TYPE_B
#define INTERLACE_TYPE_B
Definition: f_select.c:208
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:132
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:264
NULL
#define NULL
Definition: coverity.c:32
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:78
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:405
AV_PICTURE_TYPE_SI
@ AV_PICTURE_TYPE_SI
Switching Intra.
Definition: avutil.h:278
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
SelectContext::select
double select
Definition: f_select.c:161
SelectContext::prev_picref
AVFrame * prev_picref
previous frame (scene detect only)
Definition: f_select.c:160
DEFINE_OPTIONS
#define DEFINE_OPTIONS(filt_name, FLAGS)
Definition: f_select.c:167
VAR_POS
@ VAR_POS
Definition: noise_bsf.c:55
double
double
Definition: af_crystalizer.c:132
av_clipf
av_clipf
Definition: af_crystalizer.c:122
init
static av_cold int init(AVFilterContext *ctx)
Definition: f_select.c:178
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
AV_PICTURE_TYPE_SP
@ AV_PICTURE_TYPE_SP
Switching Predicted.
Definition: avutil.h:279
AV_PIX_FMT_ABGR
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
SelectContext::prev_mafd
double prev_mafd
previous MAFD (scene detect only)
Definition: f_select.c:159
SelectContext::do_scene_detect
int do_scene_detect
1 if the expression requires scene detection variables, 0 otherwise
Definition: f_select.c:157
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:210
eval.h
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
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:114
ff_default_query_formats
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:781
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:123
VAR_VARS_NB
@ VAR_VARS_NB
Definition: f_select.c:145
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:162
SelectContext::expr
AVExpr * expr
Definition: f_select.c:151
internal.h
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:329
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:95
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
SelectContext::expr_str
char * expr_str
Definition: f_select.c:150
internal.h
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: f_select.c:418
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
SelectContext::nb_planes
int nb_planes
Definition: f_select.c:154
VAR_PICT_TYPE_SI
@ VAR_PICT_TYPE_SI
Definition: f_select.c:119
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
SelectContext::bitdepth
int bitdepth
Definition: f_select.c:153
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:626
select_frame
static void select_frame(AVFilterContext *ctx, AVFrame *frame)
Definition: f_select.c:330
VAR_B
@ VAR_B
Definition: f_select.c:110
AVFilter
Filter definition.
Definition: avfilter.h:166
VAR_PICT_TYPE_BI
@ VAR_PICT_TYPE_BI
Definition: f_select.c:121
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:60
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:136
VAR_SELECTED_N
@ VAR_SELECTED_N
Definition: f_select.c:133
SelectContext::var_values
double var_values[VAR_VARS_NB]
Definition: f_select.c:152
SelectContext::nb_outputs
int nb_outputs
Definition: f_select.c:163
AVFrame::height
int height
Definition: frame.h:402
VAR_S
@ VAR_S
Definition: f_select.c:111
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
VAR_PICT_TYPE_I
@ VAR_PICT_TYPE_I
Definition: f_select.c:115
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
VAR_PREV_PTS
@ VAR_PREV_PTS
Definition: f_select.c:99
avfilter.h
VAR_SP
@ VAR_SP
Definition: f_select.c:113
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:120
AVFilterContext
An instance of a filter.
Definition: avfilter.h:397
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
desc
const char * desc
Definition: libsvtav1.c:83
AV_PICTURE_TYPE_P
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:275
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:70
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:97
ff_append_outpad_free_name
int ff_append_outpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:142
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:86
AV_PICTURE_TYPE_BI
@ AV_PICTURE_TYPE_BI
BI type.
Definition: avutil.h:280
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:245
SelectContext::height
ptrdiff_t height[4]
Definition: f_select.c:156
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:375
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:117
VAR_INTERLACE_TYPE_T
@ VAR_INTERLACE_TYPE_T
Definition: f_select.c:125
ff_vf_select
const AVFilter ff_vf_select
snprintf
#define snprintf
Definition: snprintf.h:34
VAR_I
@ VAR_I
Definition: f_select.c:108
VAR_CONCATDEC_SELECT
@ VAR_CONCATDEC_SELECT
Definition: f_select.c:143
INTERLACE_TYPE_P
#define INTERLACE_TYPE_P
Definition: f_select.c:206