FFmpeg
vf_mestimate.c
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1 /**
2  * Copyright (c) 2016 Davinder Singh (DSM_) <ds.mudhar<@gmail.com>
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 #include "motion_estimation.h"
22 #include "libavcodec/mathops.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/common.h"
25 #include "libavutil/imgutils.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
29 #include "avfilter.h"
30 #include "formats.h"
31 #include "internal.h"
32 #include "video.h"
33 
34 typedef struct MEContext {
35  const AVClass *class;
37  int method; ///< motion estimation method
38 
39  int mb_size; ///< macroblock size
40  int search_param; ///< search parameter
43 
45 
46  int (*mv_table[3])[2][2]; ///< motion vectors of current & prev 2 frames
47 } MEContext;
48 
49 #define OFFSET(x) offsetof(MEContext, x)
50 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
51 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
52 
53 static const AVOption mestimate_options[] = {
54  { "method", "motion estimation method", OFFSET(method), AV_OPT_TYPE_INT, {.i64 = AV_ME_METHOD_ESA}, AV_ME_METHOD_ESA, AV_ME_METHOD_UMH, FLAGS, "method" },
55  CONST("esa", "exhaustive search", AV_ME_METHOD_ESA, "method"),
56  CONST("tss", "three step search", AV_ME_METHOD_TSS, "method"),
57  CONST("tdls", "two dimensional logarithmic search", AV_ME_METHOD_TDLS, "method"),
58  CONST("ntss", "new three step search", AV_ME_METHOD_NTSS, "method"),
59  CONST("fss", "four step search", AV_ME_METHOD_FSS, "method"),
60  CONST("ds", "diamond search", AV_ME_METHOD_DS, "method"),
61  CONST("hexbs", "hexagon-based search", AV_ME_METHOD_HEXBS, "method"),
62  CONST("epzs", "enhanced predictive zonal search", AV_ME_METHOD_EPZS, "method"),
63  CONST("umh", "uneven multi-hexagon search", AV_ME_METHOD_UMH, "method"),
64  { "mb_size", "macroblock size", OFFSET(mb_size), AV_OPT_TYPE_INT, {.i64 = 16}, 8, INT_MAX, FLAGS },
65  { "search_param", "search parameter", OFFSET(search_param), AV_OPT_TYPE_INT, {.i64 = 7}, 4, INT_MAX, FLAGS },
66  { NULL }
67 };
68 
69 AVFILTER_DEFINE_CLASS(mestimate);
70 
72 {
73  static const enum AVPixelFormat pix_fmts[] = {
83  };
84 
85  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
86  if (!fmts_list)
87  return AVERROR(ENOMEM);
88  return ff_set_common_formats(ctx, fmts_list);
89 }
90 
92 {
93  MEContext *s = inlink->dst->priv;
94  int i;
95 
97  s->mb_size = 1 << s->log2_mb_size;
98 
99  s->b_width = inlink->w >> s->log2_mb_size;
100  s->b_height = inlink->h >> s->log2_mb_size;
101  s->b_count = s->b_width * s->b_height;
102 
103  for (i = 0; i < 3; i++) {
104  s->mv_table[i] = av_mallocz_array(s->b_count, sizeof(*s->mv_table[0]));
105  if (!s->mv_table[i])
106  return AVERROR(ENOMEM);
107  }
108 
109  ff_me_init_context(&s->me_ctx, s->mb_size, s->search_param, inlink->w, inlink->h, 0, (s->b_width - 1) << s->log2_mb_size, 0, (s->b_height - 1) << s->log2_mb_size);
110 
111  return 0;
112 }
113 
115  int x, int y, int x_mv, int y_mv, int dir)
116 {
117  mv->w = mb_size;
118  mv->h = mb_size;
119  mv->dst_x = x + (mb_size >> 1);
120  mv->dst_y = y + (mb_size >> 1);
121  mv->src_x = x_mv + (mb_size >> 1);
122  mv->src_y = y_mv + (mb_size >> 1);
123  mv->source = dir ? 1 : -1;
124  mv->flags = 0;
125 }
126 
127 #define SEARCH_MV(method)\
128  do {\
129  for (mb_y = 0; mb_y < s->b_height; mb_y++)\
130  for (mb_x = 0; mb_x < s->b_width; mb_x++) {\
131  const int x_mb = mb_x << s->log2_mb_size;\
132  const int y_mb = mb_y << s->log2_mb_size;\
133  int mv[2] = {x_mb, y_mb};\
134  ff_me_search_##method(me_ctx, x_mb, y_mb, mv);\
135  add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);\
136  }\
137  } while (0)
138 
139 #define ADD_PRED(preds, px, py)\
140  do {\
141  preds.mvs[preds.nb][0] = px;\
142  preds.mvs[preds.nb][1] = py;\
143  preds.nb++;\
144  } while(0)
145 
147 {
148  AVFilterContext *ctx = inlink->dst;
149  MEContext *s = ctx->priv;
151  AVFrameSideData *sd;
152  AVFrame *out;
153  int mb_x, mb_y, dir;
154  int32_t mv_count = 0;
155  int ret;
156 
157  if (frame->pts == AV_NOPTS_VALUE) {
158  ret = ff_filter_frame(ctx->outputs[0], frame);
159  return ret;
160  }
161 
162  av_frame_free(&s->prev);
163  s->prev = s->cur;
164  s->cur = s->next;
165  s->next = frame;
166 
167  s->mv_table[2] = memcpy(s->mv_table[2], s->mv_table[1], sizeof(*s->mv_table[1]) * s->b_count);
168  s->mv_table[1] = memcpy(s->mv_table[1], s->mv_table[0], sizeof(*s->mv_table[0]) * s->b_count);
169 
170  if (!s->cur) {
171  s->cur = av_frame_clone(frame);
172  if (!s->cur)
173  return AVERROR(ENOMEM);
174  }
175 
176  if (!s->prev)
177  return 0;
178 
179  out = av_frame_clone(s->cur);
180  if (!out)
181  return AVERROR(ENOMEM);
182 
184  if (!sd) {
185  av_frame_free(&out);
186  return AVERROR(ENOMEM);
187  }
188 
189  me_ctx->data_cur = s->cur->data[0];
190  me_ctx->linesize = s->cur->linesize[0];
191 
192  for (dir = 0; dir < 2; dir++) {
193  me_ctx->data_ref = (dir ? s->next : s->prev)->data[0];
194 
195  if (s->method == AV_ME_METHOD_DS)
196  SEARCH_MV(ds);
197  else if (s->method == AV_ME_METHOD_ESA)
198  SEARCH_MV(esa);
199  else if (s->method == AV_ME_METHOD_FSS)
200  SEARCH_MV(fss);
201  else if (s->method == AV_ME_METHOD_NTSS)
202  SEARCH_MV(ntss);
203  else if (s->method == AV_ME_METHOD_TDLS)
204  SEARCH_MV(tdls);
205  else if (s->method == AV_ME_METHOD_TSS)
206  SEARCH_MV(tss);
207  else if (s->method == AV_ME_METHOD_HEXBS)
208  SEARCH_MV(hexbs);
209  else if (s->method == AV_ME_METHOD_UMH) {
210  for (mb_y = 0; mb_y < s->b_height; mb_y++)
211  for (mb_x = 0; mb_x < s->b_width; mb_x++) {
212  const int mb_i = mb_x + mb_y * s->b_width;
213  const int x_mb = mb_x << s->log2_mb_size;
214  const int y_mb = mb_y << s->log2_mb_size;
215  int mv[2] = {x_mb, y_mb};
216 
217  AVMotionEstPredictor *preds = me_ctx->preds;
218  preds[0].nb = 0;
219 
220  ADD_PRED(preds[0], 0, 0);
221 
222  //left mb in current frame
223  if (mb_x > 0)
224  ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
225 
226  if (mb_y > 0) {
227  //top mb in current frame
228  ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width][dir][0], s->mv_table[0][mb_i - s->b_width][dir][1]);
229 
230  //top-right mb in current frame
231  if (mb_x + 1 < s->b_width)
232  ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width + 1][dir][0], s->mv_table[0][mb_i - s->b_width + 1][dir][1]);
233  //top-left mb in current frame
234  else if (mb_x > 0)
235  ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width - 1][dir][0], s->mv_table[0][mb_i - s->b_width - 1][dir][1]);
236  }
237 
238  //median predictor
239  if (preds[0].nb == 4) {
240  me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
241  me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
242  } else if (preds[0].nb == 3) {
243  me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
244  me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
245  } else if (preds[0].nb == 2) {
246  me_ctx->pred_x = preds[0].mvs[1][0];
247  me_ctx->pred_y = preds[0].mvs[1][1];
248  } else {
249  me_ctx->pred_x = 0;
250  me_ctx->pred_y = 0;
251  }
252 
253  ff_me_search_umh(me_ctx, x_mb, y_mb, mv);
254 
255  s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
256  s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
257  add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
258  }
259 
260  } else if (s->method == AV_ME_METHOD_EPZS) {
261 
262  for (mb_y = 0; mb_y < s->b_height; mb_y++)
263  for (mb_x = 0; mb_x < s->b_width; mb_x++) {
264  const int mb_i = mb_x + mb_y * s->b_width;
265  const int x_mb = mb_x << s->log2_mb_size;
266  const int y_mb = mb_y << s->log2_mb_size;
267  int mv[2] = {x_mb, y_mb};
268 
269  AVMotionEstPredictor *preds = me_ctx->preds;
270  preds[0].nb = 0;
271  preds[1].nb = 0;
272 
273  ADD_PRED(preds[0], 0, 0);
274 
275  //left mb in current frame
276  if (mb_x > 0)
277  ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
278 
279  //top mb in current frame
280  if (mb_y > 0)
281  ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width][dir][0], s->mv_table[0][mb_i - s->b_width][dir][1]);
282 
283  //top-right mb in current frame
284  if (mb_y > 0 && mb_x + 1 < s->b_width)
285  ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width + 1][dir][0], s->mv_table[0][mb_i - s->b_width + 1][dir][1]);
286 
287  //median predictor
288  if (preds[0].nb == 4) {
289  me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
290  me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
291  } else if (preds[0].nb == 3) {
292  me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
293  me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
294  } else if (preds[0].nb == 2) {
295  me_ctx->pred_x = preds[0].mvs[1][0];
296  me_ctx->pred_y = preds[0].mvs[1][1];
297  } else {
298  me_ctx->pred_x = 0;
299  me_ctx->pred_y = 0;
300  }
301 
302  //collocated mb in prev frame
303  ADD_PRED(preds[0], s->mv_table[1][mb_i][dir][0], s->mv_table[1][mb_i][dir][1]);
304 
305  //accelerator motion vector of collocated block in prev frame
306  ADD_PRED(preds[1], s->mv_table[1][mb_i][dir][0] + (s->mv_table[1][mb_i][dir][0] - s->mv_table[2][mb_i][dir][0]),
307  s->mv_table[1][mb_i][dir][1] + (s->mv_table[1][mb_i][dir][1] - s->mv_table[2][mb_i][dir][1]));
308 
309  //left mb in prev frame
310  if (mb_x > 0)
311  ADD_PRED(preds[1], s->mv_table[1][mb_i - 1][dir][0], s->mv_table[1][mb_i - 1][dir][1]);
312 
313  //top mb in prev frame
314  if (mb_y > 0)
315  ADD_PRED(preds[1], s->mv_table[1][mb_i - s->b_width][dir][0], s->mv_table[1][mb_i - s->b_width][dir][1]);
316 
317  //right mb in prev frame
318  if (mb_x + 1 < s->b_width)
319  ADD_PRED(preds[1], s->mv_table[1][mb_i + 1][dir][0], s->mv_table[1][mb_i + 1][dir][1]);
320 
321  //bottom mb in prev frame
322  if (mb_y + 1 < s->b_height)
323  ADD_PRED(preds[1], s->mv_table[1][mb_i + s->b_width][dir][0], s->mv_table[1][mb_i + s->b_width][dir][1]);
324 
325  ff_me_search_epzs(me_ctx, x_mb, y_mb, mv);
326 
327  s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
328  s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
329  add_mv_data(((AVMotionVector *) sd->data) + mv_count++, s->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
330  }
331  }
332  }
333 
334  return ff_filter_frame(ctx->outputs[0], out);
335 }
336 
338 {
339  MEContext *s = ctx->priv;
340  int i;
341 
342  av_frame_free(&s->prev);
343  av_frame_free(&s->cur);
344  av_frame_free(&s->next);
345 
346  for (i = 0; i < 3; i++)
347  av_freep(&s->mv_table[i]);
348 }
349 
350 static const AVFilterPad mestimate_inputs[] = {
351  {
352  .name = "default",
353  .type = AVMEDIA_TYPE_VIDEO,
354  .filter_frame = filter_frame,
355  .config_props = config_input,
356  },
357  { NULL }
358 };
359 
360 static const AVFilterPad mestimate_outputs[] = {
361  {
362  .name = "default",
363  .type = AVMEDIA_TYPE_VIDEO,
364  },
365  { NULL }
366 };
367 
369  .name = "mestimate",
370  .description = NULL_IF_CONFIG_SMALL("Generate motion vectors."),
371  .priv_size = sizeof(MEContext),
372  .priv_class = &mestimate_class,
373  .uninit = uninit,
375  .inputs = mestimate_inputs,
376  .outputs = mestimate_outputs,
377 };
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVFrame * cur
Definition: vf_mestimate.c:44
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
int16_t src_x
Absolute source position.
Definition: motion_vector.h:38
Main libavfilter public API header.
int pred_y
median predictor y
static int config_input(AVFilterLink *inlink)
Definition: vf_mestimate.c:91
#define AV_ME_METHOD_TDLS
Copyright (c) 2016 Davinder Singh (DSM_) <ds.mudhar<.com>
Definition: vf_mestimate.c:34
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
AVMotionEstPredictor preds[2]
const char * name
Pad name.
Definition: internal.h:60
static void add_mv_data(AVMotionVector *mv, int mb_size, int x, int y, int x_mv, int y_mv, int dir)
Definition: vf_mestimate.c:114
#define AV_ME_METHOD_DS
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
#define AV_ME_METHOD_NTSS
#define av_cold
Definition: attributes.h:82
AVOptions.
int pred_x
median predictor x
int16_t dst_x
Absolute destination position.
Definition: motion_vector.h:42
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
#define AV_ME_METHOD_EPZS
uint64_t ff_me_search_umh(AVMotionEstContext *me_ctx, int x_mb, int y_mb, int *mv)
Structure to hold side data for an AVFrame.
Definition: frame.h:201
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
int32_t source
Where the current macroblock comes from; negative value when it comes from the past, positive value when it comes from the future.
Definition: motion_vector.h:30
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
AVFILTER_DEFINE_CLASS(mestimate)
#define CONST(name, help, val, unit)
Definition: vf_mestimate.c:51
#define AV_ME_METHOD_HEXBS
A filter pad used for either input or output.
Definition: internal.h:54
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:569
int mb_size
macroblock size
Definition: vf_mestimate.c:39
#define SEARCH_MV(method)
Definition: vf_mestimate.c:127
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
uint8_t w
Width and height of the block.
Definition: motion_vector.h:34
void * priv
private data for use by the filter
Definition: avfilter.h:353
uint64_t ff_me_search_epzs(AVMotionEstContext *me_ctx, int x_mb, int y_mb, int *mv)
simple assert() macros that are a bit more flexible than ISO C assert().
#define OFFSET(x)
Definition: vf_mestimate.c:49
int search_param
search parameter
Definition: vf_mestimate.c:40
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
static const AVFilterPad mestimate_inputs[]
Definition: vf_mestimate.c:350
AVFrame * prev
Definition: vf_mestimate.c:44
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
Motion vectors exported by some codecs (on demand through the export_mvs flag set in the libavcodec A...
Definition: frame.h:96
int(*[3] mv_table)[2][2]
motion vectors of current & prev 2 frames
Definition: vf_mestimate.c:46
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
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_ME_METHOD_UMH
#define AV_ME_METHOD_TSS
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static const int8_t mv[256][2]
Definition: 4xm.c:77
#define ADD_PRED(preds, px, py)
Definition: vf_mestimate.c:139
void ff_me_init_context(AVMotionEstContext *me_ctx, int mb_size, int search_param, int width, int height, int x_min, int x_max, int y_min, int y_max)
int method
motion estimation method
Definition: vf_mestimate.c:37
static const AVOption mestimate_options[]
Definition: vf_mestimate.c:53
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mestimate.c:337
uint8_t * data
Definition: frame.h:203
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 inputs
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFrame * next
Definition: vf_mestimate.c:44
Filter definition.
Definition: avfilter.h:144
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)
Add a new side data to a frame.
Definition: frame.c:722
#define mid_pred
Definition: mathops.h:97
const char * name
Filter name.
Definition: avfilter.h:148
#define AV_ME_METHOD_FSS
int b_height
Definition: vf_mestimate.c:41
#define FLAGS
Definition: vf_mestimate.c:50
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
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
int
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
uint64_t flags
Extra flag information.
Definition: motion_vector.h:47
common internal and external API header
AVMotionEstContext me_ctx
Definition: vf_mestimate.c:36
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
#define AV_ME_METHOD_ESA
Copyright (c) 2016 Davinder Singh (DSM_) <ds.mudhar<.com>
AVFilter ff_vf_mestimate
Definition: vf_mestimate.c:368
static int query_formats(AVFilterContext *ctx)
Definition: vf_mestimate.c:71
A list of supported formats for one end of a filter link.
Definition: formats.h:64
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
An instance of a filter.
Definition: avfilter.h:338
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_mestimate.c:146
FILE * out
Definition: movenc.c:54
int log2_mb_size
Definition: vf_mestimate.c:42
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
static const AVFilterPad mestimate_outputs[]
Definition: vf_mestimate.c:360
static av_always_inline av_const int av_ceil_log2_c(int x)
Compute ceil(log2(x)).
Definition: common.h:332
internal API functions
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
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191