FFmpeg  4.4.6
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 
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 
282 static int config_input(AVFilterLink *inlink)
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 
296 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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 
331  ret = config_input(inlink);
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],
366  AV_CEIL_RSHIFT(inlink->w, hsub),
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 };
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define av_cold
Definition: attributes.h:88
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
Main libavfilter public API header.
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
common internal and external API header
#define FFMIN(a, b)
Definition: common.h:105
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:766
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
simple arithmetic expression evaluator
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:587
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
#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
#define AVERROR(e)
Definition: error.h:43
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:594
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:658
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:373
misc image utilities
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1561
static void direct(const float *in, const FFTComplex *ir, int len, float *out)
Definition: af_afir.c:60
#define TS2T(ts, tb)
Definition: internal.h:209
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
option
Definition: libkvazaar.c:325
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:309
const char * desc
Definition: libsvtav1.c:79
uint8_t w
Definition: llviddspenc.c:39
AVOptions.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
var_name
Definition: setts_bsf.c:50
Describe the class of an AVClass context structure.
Definition: log.h:67
Definition: eval.c:157
An instance of a filter.
Definition: avfilter.h:341
void * priv
private data for use by the filter
Definition: avfilter.h:356
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
A list of supported formats for one end of a filter link.
Definition: formats.h:65
A filter pad used for either input or output.
Definition: internal.h:54
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
AVOption.
Definition: opt.h:248
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
char * w_expr
Definition: vf_delogo.c:200
AVExpr * y_pexpr
Definition: vf_delogo.c:201
char * h_expr
Definition: vf_delogo.c:200
AVExpr * h_pexpr
Definition: vf_delogo.c:201
double var_values[VAR_VARS_NB]
Definition: vf_delogo.c:202
AVExpr * x_pexpr
Definition: vf_delogo.c:201
AVExpr * w_pexpr
Definition: vf_delogo.c:201
char * y_expr
Definition: vf_delogo.c:200
char * x_expr
Definition: vf_delogo.c:200
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
FILE * out
Definition: movenc.c:54
AVFormatContext * ctx
Definition: movenc.c:48
@ VAR_H
Definition: vf_delogo.c:53
@ VAR_N
Definition: vf_delogo.c:54
@ VAR_W
Definition: vf_delogo.c:52
@ VAR_VARS_NB
Definition: vf_delogo.c:56
@ VAR_X
Definition: vf_delogo.c:50
@ VAR_T
Definition: vf_delogo.c:55
@ VAR_Y
Definition: vf_delogo.c:51
AVFILTER_DEFINE_CLASS(delogo)
static const AVFilterPad avfilter_vf_delogo_inputs[]
Definition: vf_delogo.c:383
AVFilter ff_vf_delogo
Definition: vf_delogo.c:401
static int query_formats(AVFilterContext *ctx)
Definition: vf_delogo.c:229
static int config_input(AVFilterLink *inlink)
Definition: vf_delogo.c:282
#define CHECK_UNSET_OPT(opt)
#define FLAGS
Definition: vf_delogo.c:206
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_delogo.c:296
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
Definition: vf_delogo.c:59
static const char *const var_names[]
Definition: vf_delogo.c:39
static av_cold int init(AVFilterContext *ctx)
Definition: vf_delogo.c:243
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_delogo.c:218
static const AVFilterPad avfilter_vf_delogo_outputs[]
Definition: vf_delogo.c:393
#define OFFSET(x)
Definition: vf_delogo.c:205
static const AVOption delogo_options[]
Definition: vf_delogo.c:208
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
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:75
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:104