FFmpeg
vf_mestimate.c
Go to the documentation of this file.
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/common.h"
24 #include "libavutil/imgutils.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/pixdesc.h"
27 #include "libavutil/motion_vector.h"
28 #include "avfilter.h"
29 #include "formats.h"
30 #include "internal.h"
31 #include "video.h"
32 
33 typedef struct MEContext {
34  const AVClass *class;
35  AVMotionEstContext me_ctx;
36  int method; ///< motion estimation method
37 
38  int mb_size; ///< macroblock size
39  int search_param; ///< search parameter
40  int b_width, b_height, b_count;
41  int log2_mb_size;
42 
43  AVFrame *prev, *cur, *next;
44 
45  int (*mv_table[3])[2][2]; ///< motion vectors of current & prev 2 frames
46 } MEContext;
47 
48 #define OFFSET(x) offsetof(MEContext, x)
49 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
50 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
51 
52 static const AVOption mestimate_options[] = {
53  { "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" },
54  CONST("esa", "exhaustive search", AV_ME_METHOD_ESA, "method"),
55  CONST("tss", "three step search", AV_ME_METHOD_TSS, "method"),
56  CONST("tdls", "two dimensional logarithmic search", AV_ME_METHOD_TDLS, "method"),
57  CONST("ntss", "new three step search", AV_ME_METHOD_NTSS, "method"),
58  CONST("fss", "four step search", AV_ME_METHOD_FSS, "method"),
59  CONST("ds", "diamond search", AV_ME_METHOD_DS, "method"),
60  CONST("hexbs", "hexagon-based search", AV_ME_METHOD_HEXBS, "method"),
61  CONST("epzs", "enhanced predictive zonal search", AV_ME_METHOD_EPZS, "method"),
62  CONST("umh", "uneven multi-hexagon search", AV_ME_METHOD_UMH, "method"),
63  { "mb_size", "macroblock size", OFFSET(mb_size), AV_OPT_TYPE_INT, {.i64 = 16}, 8, INT_MAX, FLAGS },
64  { "search_param", "search parameter", OFFSET(search_param), AV_OPT_TYPE_INT, {.i64 = 7}, 4, INT_MAX, FLAGS },
65  { NULL }
66 };
67 
68 AVFILTER_DEFINE_CLASS(mestimate);
69 
70 static const enum AVPixelFormat pix_fmts[] = {
71  AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
72  AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
73  AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
74  AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
75  AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
76  AV_PIX_FMT_YUVJ411P,
77  AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
78  AV_PIX_FMT_GRAY8,
79  AV_PIX_FMT_NONE
80 };
81 
82 static int config_input(AVFilterLink *inlink)
83 {
84  MEContext *s = inlink->dst->priv;
85  int i;
86 
87  s->log2_mb_size = av_ceil_log2_c(s->mb_size);
88  s->mb_size = 1 << s->log2_mb_size;
89 
90  s->b_width = inlink->w >> s->log2_mb_size;
91  s->b_height = inlink->h >> s->log2_mb_size;
92  s->b_count = s->b_width * s->b_height;
93 
94  if (s->b_count == 0)
95  return AVERROR(EINVAL);
96 
97  for (i = 0; i < 3; i++) {
98  s->mv_table[i] = av_calloc(s->b_count, sizeof(*s->mv_table[0]));
99  if (!s->mv_table[i])
100  return AVERROR(ENOMEM);
101  }
102 
103  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);
104 
105  return 0;
106 }
107 
108 static void add_mv_data(AVMotionVector *mv, int mb_size,
109  int x, int y, int x_mv, int y_mv, int dir)
110 {
111  mv->w = mb_size;
112  mv->h = mb_size;
113  mv->dst_x = x + (mb_size >> 1);
114  mv->dst_y = y + (mb_size >> 1);
115  mv->src_x = x_mv + (mb_size >> 1);
116  mv->src_y = y_mv + (mb_size >> 1);
117  mv->source = dir ? 1 : -1;
118  mv->flags = 0;
119 }
120 
121 #define SEARCH_MV(method)\
122  do {\
123  for (mb_y = 0; mb_y < s->b_height; mb_y++)\
124  for (mb_x = 0; mb_x < s->b_width; mb_x++) {\
125  const int x_mb = mb_x << s->log2_mb_size;\
126  const int y_mb = mb_y << s->log2_mb_size;\
127  int mv[2] = {x_mb, y_mb};\
128  ff_me_search_##method(me_ctx, x_mb, y_mb, mv);\
129  add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);\
130  }\
131  } while (0)
132 
133 #define ADD_PRED(preds, px, py)\
134  do {\
135  preds.mvs[preds.nb][0] = px;\
136  preds.mvs[preds.nb][1] = py;\
137  preds.nb++;\
138  } while(0)
139 
140 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
141 {
142  AVFilterContext *ctx = inlink->dst;
143  MEContext *s = ctx->priv;
144  AVMotionEstContext *me_ctx = &s->me_ctx;
145  AVFrameSideData *sd;
146  AVFrame *out;
147  int mb_x, mb_y, dir;
148  int32_t mv_count = 0;
149  int ret;
150 
151  if (frame->pts == AV_NOPTS_VALUE) {
152  ret = ff_filter_frame(ctx->outputs[0], frame);
153  return ret;
154  }
155 
156  av_frame_free(&s->prev);
157  s->prev = s->cur;
158  s->cur = s->next;
159  s->next = frame;
160 
161  s->mv_table[2] = memcpy(s->mv_table[2], s->mv_table[1], sizeof(*s->mv_table[1]) * s->b_count);
162  s->mv_table[1] = memcpy(s->mv_table[1], s->mv_table[0], sizeof(*s->mv_table[0]) * s->b_count);
163 
164  if (!s->cur) {
165  s->cur = av_frame_clone(frame);
166  if (!s->cur)
167  return AVERROR(ENOMEM);
168  }
169 
170  if (!s->prev)
171  return 0;
172 
173  out = av_frame_clone(s->cur);
174  if (!out)
175  return AVERROR(ENOMEM);
176 
177  sd = av_frame_new_side_data(out, AV_FRAME_DATA_MOTION_VECTORS, 2 * s->b_count * sizeof(AVMotionVector));
178  if (!sd) {
179  av_frame_free(&out);
180  return AVERROR(ENOMEM);
181  }
182 
183  me_ctx->data_cur = s->cur->data[0];
184  me_ctx->linesize = s->cur->linesize[0];
185 
186  for (dir = 0; dir < 2; dir++) {
187  me_ctx->data_ref = (dir ? s->next : s->prev)->data[0];
188 
189  if (s->method == AV_ME_METHOD_DS)
190  SEARCH_MV(ds);
191  else if (s->method == AV_ME_METHOD_ESA)
192  SEARCH_MV(esa);
193  else if (s->method == AV_ME_METHOD_FSS)
194  SEARCH_MV(fss);
195  else if (s->method == AV_ME_METHOD_NTSS)
196  SEARCH_MV(ntss);
197  else if (s->method == AV_ME_METHOD_TDLS)
198  SEARCH_MV(tdls);
199  else if (s->method == AV_ME_METHOD_TSS)
200  SEARCH_MV(tss);
201  else if (s->method == AV_ME_METHOD_HEXBS)
202  SEARCH_MV(hexbs);
203  else if (s->method == AV_ME_METHOD_UMH) {
204  for (mb_y = 0; mb_y < s->b_height; mb_y++)
205  for (mb_x = 0; mb_x < s->b_width; mb_x++) {
206  const int mb_i = mb_x + mb_y * s->b_width;
207  const int x_mb = mb_x << s->log2_mb_size;
208  const int y_mb = mb_y << s->log2_mb_size;
209  int mv[2] = {x_mb, y_mb};
210 
211  AVMotionEstPredictor *preds = me_ctx->preds;
212  preds[0].nb = 0;
213 
214  ADD_PRED(preds[0], 0, 0);
215 
216  //left mb in current frame
217  if (mb_x > 0)
218  ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
219 
220  if (mb_y > 0) {
221  //top mb in current frame
222  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]);
223 
224  //top-right mb in current frame
225  if (mb_x + 1 < s->b_width)
226  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]);
227  //top-left mb in current frame
228  else if (mb_x > 0)
229  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]);
230  }
231 
232  //median predictor
233  if (preds[0].nb == 4) {
234  me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
235  me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
236  } else if (preds[0].nb == 3) {
237  me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
238  me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
239  } else if (preds[0].nb == 2) {
240  me_ctx->pred_x = preds[0].mvs[1][0];
241  me_ctx->pred_y = preds[0].mvs[1][1];
242  } else {
243  me_ctx->pred_x = 0;
244  me_ctx->pred_y = 0;
245  }
246 
247  ff_me_search_umh(me_ctx, x_mb, y_mb, mv);
248 
249  s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
250  s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
251  add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
252  }
253 
254  } else if (s->method == AV_ME_METHOD_EPZS) {
255 
256  for (mb_y = 0; mb_y < s->b_height; mb_y++)
257  for (mb_x = 0; mb_x < s->b_width; mb_x++) {
258  const int mb_i = mb_x + mb_y * s->b_width;
259  const int x_mb = mb_x << s->log2_mb_size;
260  const int y_mb = mb_y << s->log2_mb_size;
261  int mv[2] = {x_mb, y_mb};
262 
263  AVMotionEstPredictor *preds = me_ctx->preds;
264  preds[0].nb = 0;
265  preds[1].nb = 0;
266 
267  ADD_PRED(preds[0], 0, 0);
268 
269  //left mb in current frame
270  if (mb_x > 0)
271  ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
272 
273  //top mb in current frame
274  if (mb_y > 0)
275  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]);
276 
277  //top-right mb in current frame
278  if (mb_y > 0 && mb_x + 1 < s->b_width)
279  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]);
280 
281  //median predictor
282  if (preds[0].nb == 4) {
283  me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
284  me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
285  } else if (preds[0].nb == 3) {
286  me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
287  me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
288  } else if (preds[0].nb == 2) {
289  me_ctx->pred_x = preds[0].mvs[1][0];
290  me_ctx->pred_y = preds[0].mvs[1][1];
291  } else {
292  me_ctx->pred_x = 0;
293  me_ctx->pred_y = 0;
294  }
295 
296  //collocated mb in prev frame
297  ADD_PRED(preds[0], s->mv_table[1][mb_i][dir][0], s->mv_table[1][mb_i][dir][1]);
298 
299  //accelerator motion vector of collocated block in prev frame
300  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]),
301  s->mv_table[1][mb_i][dir][1] + (s->mv_table[1][mb_i][dir][1] - s->mv_table[2][mb_i][dir][1]));
302 
303  //left mb in prev frame
304  if (mb_x > 0)
305  ADD_PRED(preds[1], s->mv_table[1][mb_i - 1][dir][0], s->mv_table[1][mb_i - 1][dir][1]);
306 
307  //top mb in prev frame
308  if (mb_y > 0)
309  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]);
310 
311  //right mb in prev frame
312  if (mb_x + 1 < s->b_width)
313  ADD_PRED(preds[1], s->mv_table[1][mb_i + 1][dir][0], s->mv_table[1][mb_i + 1][dir][1]);
314 
315  //bottom mb in prev frame
316  if (mb_y + 1 < s->b_height)
317  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]);
318 
319  ff_me_search_epzs(me_ctx, x_mb, y_mb, mv);
320 
321  s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
322  s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
323  add_mv_data(((AVMotionVector *) sd->data) + mv_count++, s->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
324  }
325  }
326  }
327 
328  return ff_filter_frame(ctx->outputs[0], out);
329 }
330 
331 static av_cold void uninit(AVFilterContext *ctx)
332 {
333  MEContext *s = ctx->priv;
334  int i;
335 
336  av_frame_free(&s->prev);
337  av_frame_free(&s->cur);
338  av_frame_free(&s->next);
339 
340  for (i = 0; i < 3; i++)
341  av_freep(&s->mv_table[i]);
342 }
343 
344 static const AVFilterPad mestimate_inputs[] = {
345  {
346  .name = "default",
347  .type = AVMEDIA_TYPE_VIDEO,
348  .filter_frame = filter_frame,
349  .config_props = config_input,
350  },
351 };
352 
353 static const AVFilterPad mestimate_outputs[] = {
354  {
355  .name = "default",
356  .type = AVMEDIA_TYPE_VIDEO,
357  },
358 };
359 
360 const AVFilter ff_vf_mestimate = {
361  .name = "mestimate",
362  .description = NULL_IF_CONFIG_SMALL("Generate motion vectors."),
363  .priv_size = sizeof(MEContext),
364  .priv_class = &mestimate_class,
365  .uninit = uninit,
366  .flags = AVFILTER_FLAG_METADATA_ONLY,
367  FILTER_INPUTS(mestimate_inputs),
368  FILTER_OUTPUTS(mestimate_outputs),
369  FILTER_PIXFMTS_ARRAY(pix_fmts),
370 };
AVMotionEstPredictor::nb
int nb
Definition: motion_estimation.h:38
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AVMotionEstContext::data_ref
uint8_t * data_ref
Definition: motion_estimation.h:42
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
AVMotionEstPredictor
Definition: motion_estimation.h:36
out
FILE * out
Definition: movenc.c:54
av_frame_new_side_data
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, size_t size)
Add a new side data to a frame.
Definition: frame.c:670
AVMotionVector
Definition: motion_vector.h:24
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:969
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:174
MEContext::mv_table
int(*[3] mv_table)[2][2]
motion vectors of current & prev 2 frames
Definition: vf_mestimate.c:45
mv
static const int8_t mv[256][2]
Definition: 4xm.c:80
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
MEContext::b_height
int b_height
Definition: vf_mestimate.c:40
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:99
mestimate_outputs
static const AVFilterPad mestimate_outputs[]
Definition: vf_mestimate.c:353
AVMotionEstContext::data_cur
uint8_t * data_cur
Definition: motion_estimation.h:42
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:330
pixdesc.h
AVOption
AVOption.
Definition: opt.h:251
MEContext::next
AVFrame * next
Definition: vf_mestimate.c:43
data
const char data[16]
Definition: mxf.c:146
MEContext::prev
AVFrame * prev
Definition: vf_mestimate.c:43
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:165
add_mv_data
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:108
MEContext::me_ctx
AVMotionEstContext me_ctx
Definition: vf_mestimate.c:35
MEContext::method
int method
motion estimation method
Definition: vf_mestimate.c:36
video.h
MEContext
Copyright (c) 2016 Davinder Singh (DSM_) <ds.mudhar<@gmail.com>
Definition: vf_mestimate.c:33
AV_ME_METHOD_FSS
#define AV_ME_METHOD_FSS
Definition: motion_estimation.h:30
AVMotionEstContext::pred_x
int pred_x
median predictor x
Definition: motion_estimation.h:56
formats.h
SEARCH_MV
#define SEARCH_MV(method)
Definition: vf_mestimate.c:121
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_mestimate.c:82
AV_ME_METHOD_ESA
#define AV_ME_METHOD_ESA
Copyright (c) 2016 Davinder Singh (DSM_) <ds.mudhar<@gmail.com>
Definition: motion_estimation.h:26
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
AV_PIX_FMT_YUVJ411P
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:276
av_cold
#define av_cold
Definition: attributes.h:90
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
motion_vector.h
AV_ME_METHOD_TSS
#define AV_ME_METHOD_TSS
Definition: motion_estimation.h:27
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(mestimate)
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:465
CONST
#define CONST(name, help, val, unit)
Definition: vf_mestimate.c:50
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
AVMotionEstContext
Definition: motion_estimation.h:41
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:194
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
mestimate_inputs
static const AVFilterPad mestimate_inputs[]
Definition: vf_mestimate.c:344
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
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
ADD_PRED
#define ADD_PRED(preds, px, py)
Definition: vf_mestimate.c:133
motion_estimation.h
mathops.h
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
OFFSET
#define OFFSET(x)
Definition: vf_mestimate.c:48
ff_vf_mestimate
const AVFilter ff_vf_mestimate
Definition: vf_mestimate.c:360
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:115
ff_me_search_epzs
uint64_t ff_me_search_epzs(AVMotionEstContext *me_ctx, int x_mb, int y_mb, int *mv)
Definition: motion_estimation.c:333
MEContext::log2_mb_size
int log2_mb_size
Definition: vf_mestimate.c:41
mestimate_options
static const AVOption mestimate_options[]
Definition: vf_mestimate.c:52
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
AVFrameSideData::data
uint8_t * data
Definition: frame.h:238
MEContext::b_width
int b_width
Definition: vf_mestimate.c:40
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:167
AV_ME_METHOD_EPZS
#define AV_ME_METHOD_EPZS
Definition: motion_estimation.h:33
internal.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_mestimate.c:70
MEContext::cur
AVFrame * cur
Definition: vf_mestimate.c:43
AV_ME_METHOD_DS
#define AV_ME_METHOD_DS
Definition: motion_estimation.h:31
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AV_ME_METHOD_HEXBS
#define AV_ME_METHOD_HEXBS
Definition: motion_estimation.h:32
common.h
AV_PIX_FMT_YUVJ440P
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition: pixfmt.h:100
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
AVFilter
Filter definition.
Definition: avfilter.h:161
mid_pred
#define mid_pred
Definition: mathops.h:98
ret
ret
Definition: filter_design.txt:187
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
FLAGS
#define FLAGS
Definition: vf_mestimate.c:49
ff_me_init_context
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)
Definition: motion_estimation.c:46
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mestimate.c:331
MEContext::search_param
int search_param
search parameter
Definition: vf_mestimate.c:39
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
MEContext::b_count
int b_count
Definition: vf_mestimate.c:40
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_ME_METHOD_UMH
#define AV_ME_METHOD_UMH
Definition: motion_estimation.h:34
MEContext::mb_size
int mb_size
macroblock size
Definition: vf_mestimate.c:38
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVFilterContext
An instance of a filter.
Definition: avfilter.h:392
AVMotionEstContext::pred_y
int pred_y
median predictor y
Definition: motion_estimation.h:57
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
AV_ME_METHOD_NTSS
#define AV_ME_METHOD_NTSS
Definition: motion_estimation.h:29
AVMotionEstContext::linesize
int linesize
Definition: motion_estimation.h:43
AVFrameSideData
Structure to hold side data for an AVFrame.
Definition: frame.h:236
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:195
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
int32_t
int32_t
Definition: audioconvert.c:56
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
AV_FRAME_DATA_MOTION_VECTORS
@ AV_FRAME_DATA_MOTION_VECTORS
Motion vectors exported by some codecs (on demand through the export_mvs flag set in the libavcodec A...
Definition: frame.h:97
ff_me_search_umh
uint64_t ff_me_search_umh(AVMotionEstContext *me_ctx, int x_mb, int y_mb, int *mv)
Definition: motion_estimation.c:374
AVMotionEstPredictor::mvs
int mvs[10][2]
Definition: motion_estimation.h:37
AV_ME_METHOD_TDLS
#define AV_ME_METHOD_TDLS
Definition: motion_estimation.h:28
int
int
Definition: ffmpeg_filter.c:156
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_mestimate.c:140
AVMotionEstContext::preds
AVMotionEstPredictor preds[2]
Definition: motion_estimation.h:58
AV_PIX_FMT_YUVA422P
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:166
AVMotionEstContext::mb_size
int mb_size
Definition: motion_estimation.h:45
av_ceil_log2_c
static av_always_inline av_const int av_ceil_log2_c(int x)
Compute ceil(log2(x)).
Definition: common.h:417
Generated on Tue Feb 28 2023 21:33:56 for FFmpeg by   doxygen 1.8.17