FFmpeg
vf_blend.c
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1 /*
2  * Copyright (c) 2013 Paul B Mahol
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 "config_components.h"
22 
23 #include "libavutil/eval.h"
24 #include "libavutil/mem.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/pixfmt.h"
27 #include "avfilter.h"
28 #include "framesync.h"
29 #include "internal.h"
30 #include "vf_blend_init.h"
31 #include "video.h"
32 #include "blend.h"
33 
34 #define TOP 0
35 #define BOTTOM 1
36 
37 typedef struct BlendContext {
38  const AVClass *class;
39  FFFrameSync fs;
40  int hsub, vsub; ///< chroma subsampling values
41  int nb_planes;
42  char *all_expr;
43  enum BlendMode all_mode;
44  double all_opacity;
45 
46  int depth;
47  FilterParams params[4];
48  int tblend;
49  AVFrame *prev_frame; /* only used with tblend */
50 } BlendContext;
51 
52 static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
53 enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T, VAR_N, VAR_A, VAR_B, VAR_TOP, VAR_BOTTOM, VAR_VARS_NB };
54 
55 typedef struct ThreadData {
56  const AVFrame *top, *bottom;
57  AVFrame *dst;
58  AVFilterLink *inlink;
59  int plane;
60  int w, h;
61  FilterParams *param;
62 } ThreadData;
63 
64 #define OFFSET(x) offsetof(BlendContext, x)
65 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
66 
67 static const AVOption blend_options[] = {
68  { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
69  { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
70  { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
71  { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, .unit = "mode" },
72  { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, .unit = "mode" },
73  { "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, .unit = "mode" },
74  { "addition128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, .unit = "mode" },
75  { "grainmerge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, .unit = "mode" },
76  { "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, .unit = "mode" },
77  { "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, .unit = "mode" },
78  { "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, .unit = "mode" },
79  { "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, .unit = "mode" },
80  { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, .unit = "mode" },
81  { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, .unit = "mode" },
82  { "grainextract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, .unit = "mode" },
83  { "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, .unit = "mode" },
84  { "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, .unit = "mode" },
85  { "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, .unit = "mode" },
86  { "extremity", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXTREMITY}, 0, 0, FLAGS, .unit = "mode" },
87  { "freeze", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_FREEZE}, 0, 0, FLAGS, .unit = "mode" },
88  { "glow", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW}, 0, 0, FLAGS, .unit = "mode" },
89  { "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, .unit = "mode" },
90  { "hardmix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX}, 0, 0, FLAGS, .unit = "mode" },
91  { "heat", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HEAT}, 0, 0, FLAGS, .unit = "mode" },
92  { "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, .unit = "mode" },
93  { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, .unit = "mode" },
94  { "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, .unit = "mode" },
95  { "multiply128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY128},0, 0, FLAGS, .unit = "mode" },
96  { "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, .unit = "mode" },
97  { "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, .unit = "mode" },
98  { "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, .unit = "mode" },
99  { "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, .unit = "mode" },
100  { "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, .unit = "mode" },
101  { "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, .unit = "mode" },
102  { "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, .unit = "mode" },
103  { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, .unit = "mode" },
104  { "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, .unit = "mode" },
105  { "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, .unit = "mode" },
106  { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, .unit = "mode" },
107  { "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, .unit = "mode" },
108  { "softdifference","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTDIFFERENCE}, 0, 0, FLAGS, .unit = "mode" },
109  { "geometric", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GEOMETRIC}, 0, 0, FLAGS, .unit = "mode" },
110  { "harmonic", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARMONIC}, 0, 0, FLAGS, .unit = "mode" },
111  { "bleach", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BLEACH}, 0, 0, FLAGS, .unit = "mode" },
112  { "stain", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_STAIN}, 0, 0, FLAGS, .unit = "mode" },
113  { "interpolate","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_INTERPOLATE},0, 0, FLAGS, .unit = "mode" },
114  { "hardoverlay","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDOVERLAY},0, 0, FLAGS, .unit = "mode" },
115  { "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
116  { "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
117  { "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
118  { "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
119  { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
120  { "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
121  { "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
122  { "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
123  { "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
124  { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
125  { NULL }
126 };
127 
128 FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs);
129 
130 #define DEFINE_BLEND_EXPR(type, name, div) \
131 static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize, \
132  const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
133  uint8_t *_dst, ptrdiff_t dst_linesize, \
134  ptrdiff_t width, ptrdiff_t height, \
135  FilterParams *param, double *values, int starty) \
136 { \
137  const type *top = (const type*)_top; \
138  const type *bottom = (const type*)_bottom; \
139  type *dst = (type*)_dst; \
140  AVExpr *e = param->e; \
141  int y, x; \
142  dst_linesize /= div; \
143  top_linesize /= div; \
144  bottom_linesize /= div; \
145  \
146  for (y = 0; y < height; y++) { \
147  values[VAR_Y] = y + starty; \
148  for (x = 0; x < width; x++) { \
149  values[VAR_X] = x; \
150  values[VAR_TOP] = values[VAR_A] = top[x]; \
151  values[VAR_BOTTOM] = values[VAR_B] = bottom[x]; \
152  dst[x] = av_expr_eval(e, values, NULL); \
153  } \
154  dst += dst_linesize; \
155  top += top_linesize; \
156  bottom += bottom_linesize; \
157  } \
158 }
159 
160 DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
161 DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
162 DEFINE_BLEND_EXPR(float, 32bit, 4)
163 
164 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
165 {
166  ThreadData *td = arg;
167  int slice_start = (td->h * jobnr ) / nb_jobs;
168  int slice_end = (td->h * (jobnr+1)) / nb_jobs;
169  int height = slice_end - slice_start;
170  const uint8_t *top = td->top->data[td->plane];
171  const uint8_t *bottom = td->bottom->data[td->plane];
172  uint8_t *dst = td->dst->data[td->plane];
173  double values[VAR_VARS_NB];
174 
175  values[VAR_N] = td->inlink->frame_count_out;
176  values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
177  values[VAR_W] = td->w;
178  values[VAR_H] = td->h;
179  values[VAR_SW] = td->w / (double)td->dst->width;
180  values[VAR_SH] = td->h / (double)td->dst->height;
181 
182  td->param->blend(top + slice_start * td->top->linesize[td->plane],
183  td->top->linesize[td->plane],
184  bottom + slice_start * td->bottom->linesize[td->plane],
185  td->bottom->linesize[td->plane],
186  dst + slice_start * td->dst->linesize[td->plane],
187  td->dst->linesize[td->plane],
188  td->w, height, td->param, &values[0], slice_start);
189  return 0;
190 }
191 
192 static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
193  const AVFrame *bottom_buf)
194 {
195  BlendContext *s = ctx->priv;
196  AVFilterLink *inlink = ctx->inputs[0];
197  AVFilterLink *outlink = ctx->outputs[0];
198  AVFrame *dst_buf;
199  int plane;
200 
201  dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
202  if (!dst_buf)
203  return top_buf;
204 
205  if (av_frame_copy_props(dst_buf, top_buf) < 0) {
206  av_frame_free(&dst_buf);
207  return top_buf;
208  }
209 
210  for (plane = 0; plane < s->nb_planes; plane++) {
211  int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
212  int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
213  int outw = AV_CEIL_RSHIFT(dst_buf->width, hsub);
214  int outh = AV_CEIL_RSHIFT(dst_buf->height, vsub);
215  FilterParams *param = &s->params[plane];
216  ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
217  .w = outw, .h = outh, .param = param, .plane = plane,
218  .inlink = inlink };
219 
220  ff_filter_execute(ctx, filter_slice, &td, NULL,
221  FFMIN(outh, ff_filter_get_nb_threads(ctx)));
222  }
223 
224  if (!s->tblend)
225  av_frame_free(&top_buf);
226 
227  return dst_buf;
228 }
229 
230 static int blend_frame_for_dualinput(FFFrameSync *fs)
231 {
232  AVFilterContext *ctx = fs->parent;
233  AVFrame *top_buf, *bottom_buf, *dst_buf;
234  int ret;
235 
236  ret = ff_framesync_dualinput_get(fs, &top_buf, &bottom_buf);
237  if (ret < 0)
238  return ret;
239  if (!bottom_buf)
240  return ff_filter_frame(ctx->outputs[0], top_buf);
241  dst_buf = blend_frame(ctx, top_buf, bottom_buf);
242  return ff_filter_frame(ctx->outputs[0], dst_buf);
243 }
244 
245 static av_cold int init(AVFilterContext *ctx)
246 {
247  BlendContext *s = ctx->priv;
248 
249  s->tblend = !strcmp(ctx->filter->name, "tblend");
250 
251  s->fs.on_event = blend_frame_for_dualinput;
252  return 0;
253 }
254 
255 static const enum AVPixelFormat pix_fmts[] = {
256  AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
257  AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
258  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
259  AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
260  AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
261  AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GRAY9,
262  AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
263  AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
264  AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,
265  AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
266  AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
267  AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,
268  AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_GBRP14,
269  AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
270  AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
271  AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,
272  AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32, AV_PIX_FMT_GRAYF32,
273  AV_PIX_FMT_NONE
274 };
275 
276 static av_cold void uninit(AVFilterContext *ctx)
277 {
278  BlendContext *s = ctx->priv;
279  int i;
280 
281  ff_framesync_uninit(&s->fs);
282  av_frame_free(&s->prev_frame);
283 
284  for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
285  av_expr_free(s->params[i].e);
286 }
287 
288 static int config_params(AVFilterContext *ctx)
289 {
290  BlendContext *s = ctx->priv;
291  int ret;
292 
293  for (int plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
294  FilterParams *param = &s->params[plane];
295 
296  if (s->all_mode >= 0)
297  param->mode = s->all_mode;
298  if (s->all_opacity < 1)
299  param->opacity = s->all_opacity;
300 
301  ff_blend_init(param, s->depth);
302 
303  if (s->all_expr && !param->expr_str) {
304  param->expr_str = av_strdup(s->all_expr);
305  if (!param->expr_str)
306  return AVERROR(ENOMEM);
307  }
308  if (param->expr_str) {
309  ret = av_expr_parse(&param->e, param->expr_str, var_names,
310  NULL, NULL, NULL, NULL, 0, ctx);
311  if (ret < 0)
312  return ret;
313  param->blend = s->depth > 8 ? s->depth > 16 ? blend_expr_32bit : blend_expr_16bit : blend_expr_8bit;
314  }
315  }
316 
317  return 0;
318 }
319 
320 static int config_output(AVFilterLink *outlink)
321 {
322  AVFilterContext *ctx = outlink->src;
323  AVFilterLink *toplink = ctx->inputs[TOP];
324  BlendContext *s = ctx->priv;
325  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
326  int ret;
327 
328  if (!s->tblend) {
329  AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
330 
331  if (toplink->w != bottomlink->w || toplink->h != bottomlink->h) {
332  av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
333  "(size %dx%d) do not match the corresponding "
334  "second input link %s parameters (size %dx%d)\n",
335  ctx->input_pads[TOP].name, toplink->w, toplink->h,
336  ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h);
337  return AVERROR(EINVAL);
338  }
339  }
340 
341  outlink->w = toplink->w;
342  outlink->h = toplink->h;
343  outlink->time_base = toplink->time_base;
344  outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
345  outlink->frame_rate = toplink->frame_rate;
346 
347  s->hsub = pix_desc->log2_chroma_w;
348  s->vsub = pix_desc->log2_chroma_h;
349 
350  s->depth = pix_desc->comp[0].depth;
351  s->nb_planes = av_pix_fmt_count_planes(toplink->format);
352 
353  if (!s->tblend)
354  if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
355  return ret;
356 
357  ret = config_params(ctx);
358  if (ret < 0)
359  return ret;
360 
361  if (s->tblend)
362  return 0;
363 
364  ret = ff_framesync_configure(&s->fs);
365  outlink->time_base = s->fs.time_base;
366 
367  return ret;
368 }
369 
370 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
371  char *res, int res_len, int flags)
372 {
373  int ret;
374 
375  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
376  if (ret < 0)
377  return ret;
378 
379  return config_params(ctx);
380 }
381 
382 static const AVFilterPad blend_outputs[] = {
383  {
384  .name = "default",
385  .type = AVMEDIA_TYPE_VIDEO,
386  .config_props = config_output,
387  },
388 };
389 
390 #if CONFIG_BLEND_FILTER
391 
392 static int activate(AVFilterContext *ctx)
393 {
394  BlendContext *s = ctx->priv;
395  return ff_framesync_activate(&s->fs);
396 }
397 
398 static const AVFilterPad blend_inputs[] = {
399  {
400  .name = "top",
401  .type = AVMEDIA_TYPE_VIDEO,
402  },{
403  .name = "bottom",
404  .type = AVMEDIA_TYPE_VIDEO,
405  },
406 };
407 
408 const AVFilter ff_vf_blend = {
409  .name = "blend",
410  .description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
411  .preinit = blend_framesync_preinit,
412  .init = init,
413  .uninit = uninit,
414  .priv_size = sizeof(BlendContext),
415  .activate = activate,
416  FILTER_INPUTS(blend_inputs),
417  FILTER_OUTPUTS(blend_outputs),
418  FILTER_PIXFMTS_ARRAY(pix_fmts),
419  .priv_class = &blend_class,
420  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
421  .process_command = process_command,
422 };
423 
424 #endif
425 
426 #if CONFIG_TBLEND_FILTER
427 
428 static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
429 {
430  AVFilterContext *ctx = inlink->dst;
431  BlendContext *s = ctx->priv;
432  AVFilterLink *outlink = ctx->outputs[0];
433 
434  if (s->prev_frame) {
435  AVFrame *out;
436 
437  if (ctx->is_disabled)
438  out = av_frame_clone(frame);
439  else
440  out = blend_frame(ctx, frame, s->prev_frame);
441  av_frame_free(&s->prev_frame);
442  s->prev_frame = frame;
443  return ff_filter_frame(outlink, out);
444  }
445  s->prev_frame = frame;
446  return 0;
447 }
448 
449 AVFILTER_DEFINE_CLASS_EXT(tblend, "tblend", blend_options);
450 
451 static const AVFilterPad tblend_inputs[] = {
452  {
453  .name = "default",
454  .type = AVMEDIA_TYPE_VIDEO,
455  .filter_frame = tblend_filter_frame,
456  },
457 };
458 
459 const AVFilter ff_vf_tblend = {
460  .name = "tblend",
461  .description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
462  .priv_size = sizeof(BlendContext),
463  .priv_class = &tblend_class,
464  .init = init,
465  .uninit = uninit,
466  FILTER_INPUTS(tblend_inputs),
467  FILTER_OUTPUTS(blend_outputs),
468  FILTER_PIXFMTS_ARRAY(pix_fmts),
469  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
470  .process_command = process_command,
471 };
472 
473 #endif
BLEND_GLOW
@ BLEND_GLOW
Definition: blend.h:56
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:112
AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:522
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:501
BlendContext::vsub
int vsub
chroma subsampling values
Definition: vf_blend.c:40
ff_framesync_configure
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:134
td
#define td
Definition: regdef.h:70
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
BLEND_EXCLUSION
@ BLEND_EXCLUSION
Definition: blend.h:39
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_framesync_uninit
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:304
out
FILE * out
Definition: movenc.c:55
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1015
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2965
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:162
VAR_T
@ VAR_T
Definition: vf_blend.c:53
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
FilterParams::expr_str
char * expr_str
Definition: blend.h:76
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:160
VAR_BOTTOM
@ VAR_BOTTOM
Definition: vf_blend.c:53
AV_PIX_FMT_YUVA422P9
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:514
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
AVFrame::width
int width
Definition: frame.h:446
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:521
AVComponentDescriptor::depth
int depth
Number of bits in the component.
Definition: pixdesc.h:57
AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:516
AVOption
AVOption.
Definition: opt.h:346
ThreadData::bottom
const AVFrame * bottom
Definition: vf_blend.c:56
OFFSET
#define OFFSET(x)
Definition: vf_blend.c:64
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:478
FilterParams::e
AVExpr * e
Definition: blend.h:75
BLEND_NEGATION
@ BLEND_NEGATION
Definition: blend.h:43
VAR_N
@ VAR_N
Definition: vf_blend.c:53
ThreadData::w
int w
Definition: vf_blend.c:60
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:106
var_names
static const char *const var_names[]
Definition: vf_blend.c:52
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
AVFILTER_DEFINE_CLASS_EXT
#define AVFILTER_DEFINE_CLASS_EXT(name, desc, options)
Definition: internal.h:315
FFFrameSync
Frame sync structure.
Definition: framesync.h:168
BLEND_HARMONIC
@ BLEND_HARMONIC
Definition: blend.h:64
video.h
BLEND_ADDITION
@ BLEND_ADDITION
Definition: blend.h:30
AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:517
BLEND_MULTIPLY128
@ BLEND_MULTIPLY128
Definition: blend.h:58
AV_PIX_FMT_GRAY9
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:458
BLEND_GEOMETRIC
@ BLEND_GEOMETRIC
Definition: blend.h:63
BLEND_BLEACH
@ BLEND_BLEACH
Definition: blend.h:65
hsub
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:74
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_blend.c:370
BLEND_NB
@ BLEND_NB
Definition: blend.h:69
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:710
bit
#define bit(string, value)
Definition: cbs_mpeg2.c:56
BLEND_DIVIDE
@ BLEND_DIVIDE
Definition: blend.h:37
BLEND_PHOENIX
@ BLEND_PHOENIX
Definition: blend.h:46
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3005
AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:513
AV_PIX_FMT_GBRP14
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:496
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:212
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:494
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:523
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:476
config_params
static int config_params(AVFilterContext *ctx)
Definition: vf_blend.c:288
vf_blend_init.h
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:462
BLEND_AND
@ BLEND_AND
Definition: blend.h:31
BlendContext::params
FilterParams params[4]
Definition: vf_blend.c:47
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:358
DEFINE_BLEND_EXPR
#define DEFINE_BLEND_EXPR(type, name, div)
Definition: vf_blend.c:130
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_blend.c:255
blend_options
static const AVOption blend_options[]
Definition: vf_blend.c:67
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
BLEND_SOFTLIGHT
@ BLEND_SOFTLIGHT
Definition: blend.h:50
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:481
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:283
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:490
VAR_VARS_NB
@ VAR_VARS_NB
Definition: vf_blend.c:53
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:86
AV_PIX_FMT_GBRAP10
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:498
ThreadData::plane
int plane
Definition: vf_blend.c:59
filter_slice
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_blend.c:164
s
#define s(width, name)
Definition: cbs_vp9.c:198
BLEND_OR
@ BLEND_OR
Definition: blend.h:44
AV_PIX_FMT_GBRAP12
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:499
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:108
BLEND_SCREEN
@ BLEND_SCREEN
Definition: blend.h:49
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:491
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:59
VAR_B
@ VAR_B
Definition: vf_blend.c:53
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:237
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:1730
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
AV_PIX_FMT_YUVA444P12
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:520
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:475
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:489
ctx
AVFormatContext * ctx
Definition: movenc.c:49
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:593
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
VAR_H
@ VAR_H
Definition: vf_blend.c:53
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:73
AV_PIX_FMT_GRAYF32
#define AV_PIX_FMT_GRAYF32
Definition: pixfmt.h:511
BLEND_EXTREMITY
@ BLEND_EXTREMITY
Definition: blend.h:61
NAN
#define NAN
Definition: mathematics.h:115
FRAMESYNC_DEFINE_CLASS
FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs)
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:182
ThreadData::h
int h
Definition: vf_blend.c:60
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:87
arg
const char * arg
Definition: jacosubdec.c:67
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:459
ThreadData::dst
AVFrame * dst
Definition: vf_blend.c:57
BLEND_PINLIGHT
@ BLEND_PINLIGHT
Definition: blend.h:47
FilterParams::mode
enum BlendMode mode
Definition: blend.h:73
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:497
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:709
BLEND_MULTIPLY
@ BLEND_MULTIPLY
Definition: blend.h:42
fs
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:200
BlendMode
BlendMode
Definition: blend.h:27
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:85
BlendContext::depth
int depth
Definition: vf_blend.c:46
activate
filter_frame For filters that do not use the activate() callback
AV_PIX_FMT_YUV440P10
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:480
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_blend.c:245
double
double
Definition: af_crystalizer.c:131
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:479
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:81
AV_PIX_FMT_GBRP9
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:493
BLEND_SUBTRACT
@ BLEND_SUBTRACT
Definition: blend.h:51
VAR_TOP
@ VAR_TOP
Definition: vf_blend.c:53
BLEND_FREEZE
@ BLEND_FREEZE
Definition: blend.h:60
VAR_A
@ VAR_A
Definition: vf_blend.c:53
FilterParams
filter data
Definition: mlp.h:86
BLEND_LIGHTEN
@ BLEND_LIGHTEN
Definition: blend.h:41
BLEND_HEAT
@ BLEND_HEAT
Definition: blend.h:59
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:94
ff_framesync_init_dualinput
int ff_framesync_init_dualinput(FFFrameSync *fs, AVFilterContext *parent)
Initialize a frame sync structure for dualinput.
Definition: framesync.c:375
BlendContext::prev_frame
AVFrame * prev_frame
Definition: vf_blend.c:49
AV_PIX_FMT_GBRPF32
#define AV_PIX_FMT_GBRPF32
Definition: pixfmt.h:508
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:483
BLEND_DODGE
@ BLEND_DODGE
Definition: blend.h:38
BlendContext::all_expr
char * all_expr
Definition: vf_blend.c:42
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
BlendContext::tblend
int tblend
Definition: vf_blend.c:48
BlendContext
Definition: vf_blend.c:37
ff_vf_tblend
const AVFilter ff_vf_tblend
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:485
BlendContext::hsub
int hsub
Definition: vf_blend.c:40
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:887
height
#define height
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:174
AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:518
ThreadData::param
FilterParams * param
Definition: vf_blend.c:61
VAR_Y
@ VAR_Y
Definition: vf_blend.c:53
BLEND_INTERPOLATE
@ BLEND_INTERPOLATE
Definition: blend.h:67
internal.h
BLEND_HARDLIGHT
@ BLEND_HARDLIGHT
Definition: blend.h:40
BlendContext::all_mode
enum BlendMode all_mode
Definition: vf_blend.c:43
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
VAR_W
@ VAR_W
Definition: vf_blend.c:53
ff_vf_blend
const AVFilter ff_vf_blend
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:495
BlendContext::fs
FFFrameSync fs
Definition: vf_blend.c:39
ff_blend_init
static av_unused void ff_blend_init(FilterParams *param, int depth)
Definition: vf_blend_init.h:162
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:827
blend.h
ThreadData
Used for passing data between threads.
Definition: dsddec.c:71
BLEND_STAIN
@ BLEND_STAIN
Definition: blend.h:66
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
BLEND_SOFTDIFFERENCE
@ BLEND_SOFTDIFFERENCE
Definition: blend.h:62
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:107
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
BLEND_VIVIDLIGHT
@ BLEND_VIVIDLIGHT
Definition: blend.h:52
TOP
#define TOP
Definition: vf_blend.c:34
BLEND_DIFFERENCE
@ BLEND_DIFFERENCE
Definition: blend.h:35
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:477
BlendContext::nb_planes
int nb_planes
Definition: vf_blend.c:41
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_blend.c:320
AVFilter
Filter definition.
Definition: avfilter.h:166
BLEND_HARDMIX
@ BLEND_HARDMIX
Definition: blend.h:54
ret
ret
Definition: filter_design.txt:187
BLEND_GRAINMERGE
@ BLEND_GRAINMERGE
Definition: blend.h:57
pixfmt.h
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
VAR_SW
@ VAR_SW
Definition: vf_blend.c:53
AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:515
VAR_X
@ VAR_X
Definition: vf_blend.c:53
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:482
ThreadData::inlink
AVFilterLink * inlink
Definition: vf_blend.c:58
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:487
AVFrame::height
int height
Definition: frame.h:446
BLEND_HARDOVERLAY
@ BLEND_HARDOVERLAY
Definition: blend.h:68
framesync.h
blend_frame
static AVFrame * blend_frame(AVFilterContext *ctx, AVFrame *top_buf, const AVFrame *bottom_buf)
Definition: vf_blend.c:192
mode
mode
Definition: ebur128.h:83
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AV_PIX_FMT_YUVA422P12
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:519
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:235
avfilter.h
AV_PIX_FMT_GBRAPF32
#define AV_PIX_FMT_GBRAPF32
Definition: pixfmt.h:509
values
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 values
Definition: filter_design.txt:263
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:105
BLEND_XOR
@ BLEND_XOR
Definition: blend.h:53
slice_start
static int slice_start(SliceContext *sc, VVCContext *s, VVCFrameContext *fc, const CodedBitstreamUnit *unit, const int is_first_slice)
Definition: dec.c:688
BlendContext::all_opacity
double all_opacity
Definition: vf_blend.c:44
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_blend.c:276
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:78
AVFilterContext
An instance of a filter.
Definition: avfilter.h:407
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:165
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:272
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:77
mem.h
BLEND_DARKEN
@ BLEND_DARKEN
Definition: blend.h:34
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
blend_frame_for_dualinput
static int blend_frame_for_dualinput(FFFrameSync *fs)
Definition: vf_blend.c:230
BLEND_AVERAGE
@ BLEND_AVERAGE
Definition: blend.h:32
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:183
FilterParams::opacity
double opacity
Definition: blend.h:74
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:80
ThreadData::top
const AVFrame * top
Definition: vf_blend.c:56
FilterParams::blend
void(* blend)(const uint8_t *top, ptrdiff_t top_linesize, const uint8_t *bottom, ptrdiff_t bottom_linesize, uint8_t *dst, ptrdiff_t dst_linesize, ptrdiff_t width, ptrdiff_t height, struct FilterParams *param, double *values, int starty)
Definition: blend.h:77
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:155
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
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:79
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AV_PIX_FMT_YUV440P12
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:484
BLEND_BURN
@ BLEND_BURN
Definition: blend.h:33
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:488
ff_framesync_activate
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
Definition: framesync.c:355
blend_outputs
static const AVFilterPad blend_outputs[]
Definition: vf_blend.c:382
ff_framesync_dualinput_get
int ff_framesync_dualinput_get(FFFrameSync *fs, AVFrame **f0, AVFrame **f1)
Definition: framesync.c:393
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:239
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:460
ff_filter_execute
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: internal.h:134
VAR_SH
@ VAR_SH
Definition: vf_blend.c:53
BLEND_REFLECT
@ BLEND_REFLECT
Definition: blend.h:48
BLEND_GRAINEXTRACT
@ BLEND_GRAINEXTRACT
Definition: blend.h:36
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:244
BOTTOM
#define BOTTOM
Definition: vf_blend.c:35
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
FLAGS
#define FLAGS
Definition: vf_blend.c:65
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:173
BLEND_LINEARLIGHT
@ BLEND_LINEARLIGHT
Definition: blend.h:55
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:486
BLEND_NORMAL
@ BLEND_NORMAL
Definition: blend.h:29
BLEND_OVERLAY
@ BLEND_OVERLAY
Definition: blend.h:45
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