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  };
237  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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  }
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 
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 
352  av_frame_copy_props(out, in);
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,
409  .inputs = avfilter_vf_delogo_inputs,
410  .outputs = avfilter_vf_delogo_outputs,
412 };
#define NULL
Definition: coverity.c:32
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
AVOption.
Definition: opt.h:248
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:87
#define TS2T(ts, tb)
Definition: internal.h:239
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
#define FLAGS
Definition: vf_delogo.c:206
int num
Numerator.
Definition: rational.h:59
static int query_formats(AVFilterContext *ctx)
Definition: vf_delogo.c:229
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
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
Definition: vf_delogo.c:59
#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:125
const char * name
Pad name.
Definition: internal.h:60
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1091
static int config_input(AVFilterLink *inlink)
Definition: vf_delogo.c:282
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
uint8_t
#define av_cold
Definition: attributes.h:88
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:401
Definition: eval.c:157
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
AVFilter ff_vf_delogo
Definition: vf_delogo.c:401
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
#define U(x)
Definition: vp56_arith.h:37
#define src
Definition: vp8dsp.c:254
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
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:600
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static const AVFilterPad avfilter_vf_delogo_outputs[]
Definition: vf_delogo.c:393
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
void * priv
private data for use by the filter
Definition: avfilter.h:353
static void direct(const float *in, const FFTComplex *ir, int len, float *out)
Definition: af_afir.c:60
char * h_expr
Definition: vf_delogo.c:200
static av_cold int init(AVFilterContext *ctx)
Definition: vf_delogo.c:243
#define OFFSET(x)
Definition: vf_delogo.c:205
#define FFMAX(a, b)
Definition: common.h:94
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
var_name
Definition: aeval.c:46
char * y_expr
Definition: vf_delogo.c:200
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
#define FFMIN(a, b)
Definition: common.h:96
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_delogo.c:296
uint8_t w
Definition: llviddspenc.c:38
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_delogo.c:218
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
AVExpr * x_pexpr
Definition: vf_delogo.c:201
AVFILTER_DEFINE_CLASS(delogo)
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:595
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
static const char *const var_names[]
Definition: vf_delogo.c:39
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:396
static const AVOption delogo_options[]
Definition: vf_delogo.c:208
AVExpr * w_pexpr
Definition: vf_delogo.c:201
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
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
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
AVExpr * h_pexpr
Definition: vf_delogo.c:201
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
option
Definition: libkvazaar.c:291
Rational number (pair of numerator and denominator).
Definition: rational.h:58
const char * name
Filter name.
Definition: avfilter.h:148
char * x_expr
Definition: vf_delogo.c:200
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1560
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
char * w_expr
Definition: vf_delogo.c:200
#define flags(name, subs,...)
Definition: cbs_av1.c:560
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
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
#define CHECK_UNSET_OPT(opt)
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
double var_values[VAR_VARS_NB]
Definition: vf_delogo.c:202
common internal and external API header
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
int den
Denominator.
Definition: rational.h:60
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:766
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
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:338
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
static const AVFilterPad avfilter_vf_delogo_inputs[]
Definition: vf_delogo.c:383
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:75
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:659
simple arithmetic expression evaluator
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
AVExpr * y_pexpr
Definition: vf_delogo.c:201