FFmpeg
vf_delogo.c
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1 /*
2  * Copyright (c) 2002 Jindrich Makovicka <makovick@gmail.com>
3  * Copyright (c) 2011 Stefano Sabatini
4  * Copyright (c) 2013, 2015 Jean Delvare <jdelvare@suse.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21  */
22 
23 /**
24  * @file
25  * A very simple tv station logo remover
26  * Originally imported from MPlayer libmpcodecs/vf_delogo.c,
27  * the algorithm was later improved.
28  */
29 
30 #include "libavutil/common.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/eval.h"
35 #include "avfilter.h"
36 #include "formats.h"
37 #include "internal.h"
38 #include "video.h"
39 static const char * const var_names[] = {
40  "x",
41  "y",
42  "w",
43  "h",
44  "n", ///< number of frame
45  "t", ///< timestamp expressed in seconds
46  NULL
47 };
48 
49 enum var_name {
57 };
58 
59 static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
60 {
61  int ret;
62  AVExpr *old = NULL;
63 
64  if (*pexpr)
65  old = *pexpr;
66  ret = av_expr_parse(pexpr, expr, var_names, NULL, NULL, NULL, NULL, 0, log_ctx);
67  if (ret < 0) {
68  av_log(log_ctx, AV_LOG_ERROR,
69  "Error when parsing the expression '%s' for %s\n",
70  expr, option);
71  *pexpr = old;
72  return ret;
73  }
74 
75  av_expr_free(old);
76  return 0;
77 }
78 
79 
80 /**
81  * Apply a simple delogo algorithm to the image in src and put the
82  * result in dst.
83  *
84  * The algorithm is only applied to the region specified by the logo
85  * parameters.
86  *
87  * @param w width of the input image
88  * @param h height of the input image
89  * @param logo_x x coordinate of the top left corner of the logo region
90  * @param logo_y y coordinate of the top left corner of the logo region
91  * @param logo_w width of the logo
92  * @param logo_h height of the logo
93  * @param band the size of the band around the processed area
94  * @param show show a rectangle around the processed area, useful for
95  * parameters tweaking
96  * @param direct if non-zero perform in-place processing
97  */
98 static void apply_delogo(uint8_t *dst, int dst_linesize,
99  uint8_t *src, int src_linesize,
100  int w, int h, AVRational sar,
101  int logo_x, int logo_y, int logo_w, int logo_h,
102  unsigned int band, int show, int direct)
103 {
104  int x, y;
105  uint64_t interp, weightl, weightr, weightt, weightb, weight;
106  uint8_t *xdst, *xsrc;
107 
108  uint8_t *topleft, *botleft, *topright;
109  unsigned int left_sample, right_sample;
110  int xclipl, xclipr, yclipt, yclipb;
111  int logo_x1, logo_x2, logo_y1, logo_y2;
112 
113  xclipl = FFMAX(-logo_x, 0);
114  xclipr = FFMAX(logo_x+logo_w-w, 0);
115  yclipt = FFMAX(-logo_y, 0);
116  yclipb = FFMAX(logo_y+logo_h-h, 0);
117 
118  logo_x1 = logo_x + xclipl;
119  logo_x2 = logo_x + logo_w - xclipr - 1;
120  logo_y1 = logo_y + yclipt;
121  logo_y2 = logo_y + logo_h - yclipb - 1;
122 
123  topleft = src+logo_y1 * src_linesize+logo_x1;
124  topright = src+logo_y1 * src_linesize+logo_x2;
125  botleft = src+logo_y2 * src_linesize+logo_x1;
126 
127  if (!direct)
128  av_image_copy_plane(dst, dst_linesize, src, src_linesize, w, h);
129 
130  dst += (logo_y1 + 1) * dst_linesize;
131  src += (logo_y1 + 1) * src_linesize;
132 
133  for (y = logo_y1+1; y < logo_y2; y++) {
134  left_sample = topleft[src_linesize*(y-logo_y1)] +
135  topleft[src_linesize*(y-logo_y1-1)] +
136  topleft[src_linesize*(y-logo_y1+1)];
137  right_sample = topright[src_linesize*(y-logo_y1)] +
138  topright[src_linesize*(y-logo_y1-1)] +
139  topright[src_linesize*(y-logo_y1+1)];
140 
141  for (x = logo_x1+1,
142  xdst = dst+logo_x1+1,
143  xsrc = src+logo_x1+1; x < logo_x2; x++, xdst++, xsrc++) {
144 
145  if (show && (y == logo_y1+1 || y == logo_y2-1 ||
146  x == logo_x1+1 || x == logo_x2-1)) {
147  *xdst = 0;
148  continue;
149  }
150 
151  /* Weighted interpolation based on relative distances, taking SAR into account */
152  weightl = (uint64_t) (logo_x2-x) * (y-logo_y1) * (logo_y2-y) * sar.den;
153  weightr = (uint64_t)(x-logo_x1) * (y-logo_y1) * (logo_y2-y) * sar.den;
154  weightt = (uint64_t)(x-logo_x1) * (logo_x2-x) * (logo_y2-y) * sar.num;
155  weightb = (uint64_t)(x-logo_x1) * (logo_x2-x) * (y-logo_y1) * sar.num;
156 
157  interp =
158  left_sample * weightl
159  +
160  right_sample * weightr
161  +
162  (topleft[x-logo_x1] +
163  topleft[x-logo_x1-1] +
164  topleft[x-logo_x1+1]) * weightt
165  +
166  (botleft[x-logo_x1] +
167  botleft[x-logo_x1-1] +
168  botleft[x-logo_x1+1]) * weightb;
169  weight = (weightl + weightr + weightt + weightb) * 3U;
170  interp = (interp + (weight >> 1)) / weight;
171 
172  if (y >= logo_y+band && y < logo_y+logo_h-band &&
173  x >= logo_x+band && x < logo_x+logo_w-band) {
174  *xdst = interp;
175  } else {
176  unsigned dist = 0;
177 
178  if (x < logo_x+band)
179  dist = FFMAX(dist, logo_x-x+band);
180  else if (x >= logo_x+logo_w-band)
181  dist = FFMAX(dist, x-(logo_x+logo_w-1-band));
182 
183  if (y < logo_y+band)
184  dist = FFMAX(dist, logo_y-y+band);
185  else if (y >= logo_y+logo_h-band)
186  dist = FFMAX(dist, y-(logo_y+logo_h-1-band));
187 
188  *xdst = (*xsrc*dist + interp*(band-dist))/band;
189  }
190  }
191 
192  dst += dst_linesize;
193  src += src_linesize;
194  }
195 }
196 
197 typedef struct DelogoContext {
198  const AVClass *class;
199  int x, y, w, h, band, show;
200  char *x_expr, *y_expr, *w_expr, *h_expr;
203 } DelogoContext;
204 
205 #define OFFSET(x) offsetof(DelogoContext, x)
206 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
207 
208 static const AVOption delogo_options[]= {
209  { "x", "set logo x position", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
210  { "y", "set logo y position", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
211  { "w", "set logo width", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
212  { "h", "set logo height", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
213  { "show", "show delogo area", OFFSET(show), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
214  { NULL }
215 };
216 
217 AVFILTER_DEFINE_CLASS(delogo);
219 {
220  DelogoContext *s = ctx->priv;
221 
222  av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
223  av_expr_free(s->y_pexpr); s->y_pexpr = NULL;
224  av_expr_free(s->w_pexpr); s->w_pexpr = NULL;
225  av_expr_free(s->h_pexpr); s->h_pexpr = NULL;
226 }
227 
228 
230 {
231  static const enum AVPixelFormat pix_fmts[] = {
236  };
238  if (!fmts_list)
239  return AVERROR(ENOMEM);
240  return ff_set_common_formats(ctx, fmts_list);
241 }
242 
244 {
245  DelogoContext *s = ctx->priv;
246  int ret = 0;
247 
248  if ((ret = set_expr(&s->x_pexpr, s->x_expr, "x", ctx)) < 0 ||
249  (ret = set_expr(&s->y_pexpr, s->y_expr, "y", ctx)) < 0 ||
250  (ret = set_expr(&s->w_pexpr, s->w_expr, "w", ctx)) < 0 ||
251  (ret = set_expr(&s->h_pexpr, s->h_expr, "h", ctx)) < 0 )
252  return ret;
253 
254  s->x = av_expr_eval(s->x_pexpr, s->var_values, s);
255  s->y = av_expr_eval(s->y_pexpr, s->var_values, s);
256  s->w = av_expr_eval(s->w_pexpr, s->var_values, s);
257  s->h = av_expr_eval(s->h_pexpr, s->var_values, s);
258 
259 #define CHECK_UNSET_OPT(opt) \
260  if (s->opt == -1) { \
261  av_log(s, AV_LOG_ERROR, "Option %s was not set.\n", #opt); \
262  return AVERROR(EINVAL); \
263  }
264  CHECK_UNSET_OPT(x);
265  CHECK_UNSET_OPT(y);
268 
269  s->band = 1;
270 
271  av_log(ctx, AV_LOG_VERBOSE, "x:%d y:%d, w:%d h:%d band:%d show:%d\n",
272  s->x, s->y, s->w, s->h, s->band, s->show);
273 
274  s->w += s->band*2;
275  s->h += s->band*2;
276  s->x -= s->band;
277  s->y -= s->band;
278 
279  return 0;
280 }
281 
283 {
284  DelogoContext *s = inlink->dst->priv;
285 
286  /* Check whether the logo area fits in the frame */
287  if (s->x + (s->band - 1) < 0 || s->x + s->w - (s->band*2 - 2) > inlink->w ||
288  s->y + (s->band - 1) < 0 || s->y + s->h - (s->band*2 - 2) > inlink->h) {
289  av_log(s, AV_LOG_ERROR, "Logo area is outside of the frame.\n");
290  return AVERROR(EINVAL);
291  }
292 
293  return 0;
294 }
295 
297 {
298  DelogoContext *s = inlink->dst->priv;
299  AVFilterLink *outlink = inlink->dst->outputs[0];
301  AVFrame *out;
302  int hsub0 = desc->log2_chroma_w;
303  int vsub0 = desc->log2_chroma_h;
304  int direct = 0;
305  int plane;
306  AVRational sar;
307  int ret;
308 
309  s->var_values[VAR_N] = inlink->frame_count_out;
310  s->var_values[VAR_T] = TS2T(in->pts, inlink->time_base);
311  s->x = av_expr_eval(s->x_pexpr, s->var_values, s);
312  s->y = av_expr_eval(s->y_pexpr, s->var_values, s);
313  s->w = av_expr_eval(s->w_pexpr, s->var_values, s);
314  s->h = av_expr_eval(s->h_pexpr, s->var_values, s);
315 
316  if (s->x + (s->band - 1) <= 0 || s->x + s->w - (s->band*2 - 2) > inlink->w ||
317  s->y + (s->band - 1) <= 0 || s->y + s->h - (s->band*2 - 2) > inlink->h) {
318  av_log(s, AV_LOG_WARNING, "Logo area is outside of the frame,"
319  " auto set the area inside of the frame\n");
320  }
321 
322  if (s->x + (s->band - 1) <= 0)
323  s->x = 1 + s->band;
324  if (s->y + (s->band - 1) <= 0)
325  s->y = 1 + s->band;
326  if (s->x + s->w - (s->band*2 - 2) > inlink->w)
327  s->w = inlink->w - s->x - (s->band*2 - 2);
328  if (s->y + s->h - (s->band*2 - 2) > inlink->h)
329  s->h = inlink->h - s->y - (s->band*2 - 2);
330 
332  if (ret < 0) {
333  av_frame_free(&in);
334  return ret;
335  }
336 
337  s->w += s->band*2;
338  s->h += s->band*2;
339  s->x -= s->band;
340  s->y -= s->band;
341 
342  if (av_frame_is_writable(in)) {
343  direct = 1;
344  out = in;
345  } else {
346  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
347  if (!out) {
348  av_frame_free(&in);
349  return AVERROR(ENOMEM);
350  }
351 
353  }
354 
355  sar = in->sample_aspect_ratio;
356  /* Assume square pixels if SAR is unknown */
357  if (!sar.num)
358  sar.num = sar.den = 1;
359 
360  for (plane = 0; plane < desc->nb_components; plane++) {
361  int hsub = plane == 1 || plane == 2 ? hsub0 : 0;
362  int vsub = plane == 1 || plane == 2 ? vsub0 : 0;
363 
364  apply_delogo(out->data[plane], out->linesize[plane],
365  in ->data[plane], in ->linesize[plane],
367  AV_CEIL_RSHIFT(inlink->h, vsub),
368  sar, s->x>>hsub, s->y>>vsub,
369  /* Up and left borders were rounded down, inject lost bits
370  * into width and height to avoid error accumulation */
371  AV_CEIL_RSHIFT(s->w + (s->x & ((1<<hsub)-1)), hsub),
372  AV_CEIL_RSHIFT(s->h + (s->y & ((1<<vsub)-1)), vsub),
373  s->band>>FFMIN(hsub, vsub),
374  s->show, direct);
375  }
376 
377  if (!direct)
378  av_frame_free(&in);
379 
380  return ff_filter_frame(outlink, out);
381 }
382 
384  {
385  .name = "default",
386  .type = AVMEDIA_TYPE_VIDEO,
387  .filter_frame = filter_frame,
388  .config_props = config_input,
389  },
390  { NULL }
391 };
392 
394  {
395  .name = "default",
396  .type = AVMEDIA_TYPE_VIDEO,
397  },
398  { NULL }
399 };
400 
402  .name = "delogo",
403  .description = NULL_IF_CONFIG_SMALL("Remove logo from input video."),
404  .priv_size = sizeof(DelogoContext),
405  .priv_class = &delogo_class,
406  .init = init,
407  .uninit = uninit,
412 };
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:97
ff_vf_delogo
const AVFilter ff_vf_delogo
Definition: vf_delogo.c:401
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
direct
static void direct(const float *in, const FFTComplex *ir, int len, float *out)
Definition: af_afir.c:61
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
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
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2540
DelogoContext::h
int h
Definition: vf_delogo.c:199
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
CHECK_UNSET_OPT
#define CHECK_UNSET_OPT(opt)
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
pixdesc.h
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:396
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:247
VAR_X
@ VAR_X
Definition: vf_delogo.c:50
DelogoContext::var_values
double var_values[VAR_VARS_NB]
Definition: vf_delogo.c:202
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
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:149
video.h
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
av_image_copy_plane
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:374
hsub
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:74
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
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
DelogoContext::x
int x
Definition: vf_delogo.c:199
avfilter_vf_delogo_inputs
static const AVFilterPad avfilter_vf_delogo_inputs[]
Definition: vf_delogo.c:383
U
#define U(x)
Definition: vp56_arith.h:37
VAR_N
@ VAR_N
Definition: vf_delogo.c:54
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_delogo.c:243
DelogoContext::x_expr
char * x_expr
Definition: vf_delogo.c:200
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
AVRational::num
int num
Numerator.
Definition: rational.h:59
VAR_W
@ VAR_W
Definition: vf_delogo.c:52
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
DelogoContext::h_pexpr
AVExpr * h_pexpr
Definition: vf_delogo.c:201
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_delogo.c:282
TS2T
#define TS2T(ts, tb)
Definition: internal.h:209
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
inputs
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
Definition: filter_design.txt:243
var_name
var_name
Definition: setts_bsf.c:50
DelogoContext::x_pexpr
AVExpr * x_pexpr
Definition: vf_delogo.c:201
ff_set_common_formats
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:580
VAR_T
@ VAR_T
Definition: vf_delogo.c:55
DelogoContext::band
int band
Definition: vf_delogo.c:199
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_delogo.c:296
s
#define s(width, name)
Definition: cbs_vp9.c:257
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
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:290
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
AVExpr
Definition: eval.c:157
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
DelogoContext::w_expr
char * w_expr
Definition: vf_delogo.c:200
apply_delogo
static void apply_delogo(uint8_t *dst, int dst_linesize, uint8_t *src, int src_linesize, int w, int h, AVRational sar, int logo_x, int logo_y, int logo_w, int logo_h, unsigned int band, int show, int direct)
Apply a simple delogo algorithm to the image in src and put the result in dst.
Definition: vf_delogo.c:98
DelogoContext::y
int y
Definition: vf_delogo.c:199
option
option
Definition: libkvazaar.c:306
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:537
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
src
#define src
Definition: vp8dsp.c:255
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
weight
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1561
FLAGS
#define FLAGS
Definition: vf_delogo.c:206
eval.h
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:116
DelogoContext
Definition: vf_delogo.c:197
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
DelogoContext::w
int w
Definition: vf_delogo.c:199
DelogoContext::h_expr
char * h_expr
Definition: vf_delogo.c:200
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:473
VAR_VARS_NB
@ VAR_VARS_NB
Definition: vf_delogo.c:56
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
DelogoContext::show
int show
Definition: vf_delogo.c:199
internal.h
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:126
VAR_Y
@ VAR_Y
Definition: vf_delogo.c:51
common.h
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVFilter
Filter definition.
Definition: avfilter.h:145
ret
ret
Definition: filter_design.txt:187
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_delogo.c:218
AVFrame::sample_aspect_ratio
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:391
VAR_H
@ VAR_H
Definition: vf_delogo.c:53
AVRational::den
int den
Denominator.
Definition: rational.h:60
OFFSET
#define OFFSET(x)
Definition: vf_delogo.c:205
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
avfilter.h
DelogoContext::y_pexpr
AVExpr * y_pexpr
Definition: vf_delogo.c:201
delogo_options
static const AVOption delogo_options[]
Definition: vf_delogo.c:208
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:333
desc
const char * desc
Definition: libsvtav1.c:79
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
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
DelogoContext::w_pexpr
AVExpr * w_pexpr
Definition: vf_delogo.c:201
avfilter_vf_delogo_outputs
static const AVFilterPad avfilter_vf_delogo_outputs[]
Definition: vf_delogo.c:393
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_delogo.c:229
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:241
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
DelogoContext::y_expr
char * y_expr
Definition: vf_delogo.c:200
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
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_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
h
h
Definition: vp9dsp_template.c:2038
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
var_names
static const char *const var_names[]
Definition: vf_delogo.c:39
set_expr
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
Definition: vf_delogo.c:59
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(delogo)