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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 "libavutil/imgutils.h"
22 #include "libavutil/eval.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixfmt.h"
25 #include "avfilter.h"
26 #include "bufferqueue.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "dualinput.h"
30 #include "video.h"
31 
32 #define TOP 0
33 #define BOTTOM 1
34 
35 enum BlendMode {
36  BLEND_UNSET = -1,
37  BLEND_NORMAL,
38  BLEND_ADDITION,
39  BLEND_AND,
40  BLEND_AVERAGE,
41  BLEND_BURN,
42  BLEND_DARKEN,
43  BLEND_DIFFERENCE,
44  BLEND_DIFFERENCE128,
45  BLEND_DIVIDE,
46  BLEND_DODGE,
47  BLEND_EXCLUSION,
48  BLEND_HARDLIGHT,
49  BLEND_LIGHTEN,
50  BLEND_MULTIPLY,
51  BLEND_NEGATION,
52  BLEND_OR,
53  BLEND_OVERLAY,
54  BLEND_PHOENIX,
55  BLEND_PINLIGHT,
56  BLEND_REFLECT,
57  BLEND_SCREEN,
58  BLEND_SOFTLIGHT,
59  BLEND_SUBTRACT,
60  BLEND_VIVIDLIGHT,
61  BLEND_XOR,
62  BLEND_HARDMIX,
63  BLEND_LINEARLIGHT,
64  BLEND_GLOW,
65  BLEND_NB
66 };
67 
68 static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
69 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 };
70 
71 typedef struct FilterParams {
72  enum BlendMode mode;
73  double opacity;
74  AVExpr *e;
75  char *expr_str;
76  void (*blend)(const uint8_t *top, int top_linesize,
77  const uint8_t *bottom, int bottom_linesize,
78  uint8_t *dst, int dst_linesize,
79  int width, int start, int end,
80  struct FilterParams *param, double *values);
81 } FilterParams;
82 
83 typedef struct ThreadData {
84  const AVFrame *top, *bottom;
85  AVFrame *dst;
86  AVFilterLink *inlink;
87  int plane;
88  int w, h;
89  FilterParams *param;
90 } ThreadData;
91 
92 typedef struct {
93  const AVClass *class;
94  FFDualInputContext dinput;
95  int hsub, vsub; ///< chroma subsampling values
96  int nb_planes;
97  char *all_expr;
98  enum BlendMode all_mode;
99  double all_opacity;
100 
101  FilterParams params[4];
102  int tblend;
103  AVFrame *prev_frame; /* only used with tblend */
104 } BlendContext;
105 
106 #define COMMON_OPTIONS \
107  { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
108  { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
109  { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
110  { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
111  { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode"},\
112  { "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, "mode" },\
113  { "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, "mode" },\
114  { "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },\
115  { "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, "mode" },\
116  { "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, "mode" },\
117  { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },\
118  { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE128}, 0, 0, FLAGS, "mode" },\
119  { "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },\
120  { "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },\
121  { "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },\
122  { "glow", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW}, 0, 0, FLAGS, "mode" },\
123  { "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },\
124  { "hardmix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX}, 0, 0, FLAGS, "mode" },\
125  { "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },\
126  { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },\
127  { "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },\
128  { "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },\
129  { "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },\
130  { "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },\
131  { "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },\
132  { "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },\
133  { "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },\
134  { "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },\
135  { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },\
136  { "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },\
137  { "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },\
138  { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },\
139  { "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },\
140  { "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
141  { "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
142  { "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
143  { "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
144  { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
145  { "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
146  { "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
147  { "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
148  { "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
149  { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS}
150 
151 #define OFFSET(x) offsetof(BlendContext, x)
152 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
153 
154 static const AVOption blend_options[] = {
155  COMMON_OPTIONS,
156  { "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
157  { "repeatlast", "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
158  { NULL }
159 };
160 
161 AVFILTER_DEFINE_CLASS(blend);
162 
163 static void blend_normal(const uint8_t *top, int top_linesize,
164  const uint8_t *bottom, int bottom_linesize,
165  uint8_t *dst, int dst_linesize,
166  int width, int start, int end,
167  FilterParams *param, double *values)
168 {
169  av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, end - start);
170 }
171 
172 #define DEFINE_BLEND8(name, expr) \
173 static void blend_## name##_8bit(const uint8_t *top, int top_linesize, \
174  const uint8_t *bottom, int bottom_linesize, \
175  uint8_t *dst, int dst_linesize, \
176  int width, int start, int end, \
177  FilterParams *param, double *values) \
178 { \
179  double opacity = param->opacity; \
180  int i, j; \
181  \
182  for (i = start; i < end; i++) { \
183  for (j = 0; j < width; j++) { \
184  dst[j] = top[j] + ((expr) - top[j]) * opacity; \
185  } \
186  dst += dst_linesize; \
187  top += top_linesize; \
188  bottom += bottom_linesize; \
189  } \
190 }
191 
192 #define DEFINE_BLEND16(name, expr) \
193 static void blend_## name##_16bit(const uint8_t *_top, int top_linesize, \
194  const uint8_t *_bottom, int bottom_linesize, \
195  uint8_t *_dst, int dst_linesize, \
196  int width, int start, int end, \
197  FilterParams *param, double *values) \
198 { \
199  const uint16_t *top = (uint16_t*)_top; \
200  const uint16_t *bottom = (uint16_t*)_bottom; \
201  uint16_t *dst = (uint16_t*)_dst; \
202  double opacity = param->opacity; \
203  int i, j; \
204  dst_linesize /= 2; \
205  top_linesize /= 2; \
206  bottom_linesize /= 2; \
207  \
208  for (i = start; i < end; i++) { \
209  for (j = 0; j < width; j++) { \
210  dst[j] = top[j] + ((expr) - top[j]) * opacity; \
211  } \
212  dst += dst_linesize; \
213  top += top_linesize; \
214  bottom += bottom_linesize; \
215  } \
216 }
217 
218 #define A top[j]
219 #define B bottom[j]
220 
221 #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))
222 #define SCREEN(x, a, b) (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))
223 #define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))
224 #define DODGE(a, b) (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))
225 
226 DEFINE_BLEND8(addition, FFMIN(255, A + B))
227 DEFINE_BLEND8(average, (A + B) / 2)
228 DEFINE_BLEND8(subtract, FFMAX(0, A - B))
229 DEFINE_BLEND8(multiply, MULTIPLY(1, A, B))
230 DEFINE_BLEND8(negation, 255 - FFABS(255 - A - B))
231 DEFINE_BLEND8(difference, FFABS(A - B))
232 DEFINE_BLEND8(difference128, av_clip_uint8(128 + A - B))
233 DEFINE_BLEND8(screen, SCREEN(1, A, B))
234 DEFINE_BLEND8(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
235 DEFINE_BLEND8(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
236 DEFINE_BLEND8(hardmix, (A < (255 - B)) ? 0: 255)
237 DEFINE_BLEND8(darken, FFMIN(A, B))
238 DEFINE_BLEND8(lighten, FFMAX(A, B))
239 DEFINE_BLEND8(divide, av_clip_uint8(((float)A / ((float)B) * 255)))
240 DEFINE_BLEND8(dodge, DODGE(A, B))
241 DEFINE_BLEND8(burn, BURN(A, B))
242 DEFINE_BLEND8(softlight, (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - FFABS(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - FFABS(B - 127.5)/255))
243 DEFINE_BLEND8(exclusion, A + B - 2 * A * B / 255)
244 DEFINE_BLEND8(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
245 DEFINE_BLEND8(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
246 DEFINE_BLEND8(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
247 DEFINE_BLEND8(glow, (A == 255) ? A : FFMIN(255, (B * B / (255 - A))))
248 DEFINE_BLEND8(and, A & B)
249 DEFINE_BLEND8(or, A | B)
250 DEFINE_BLEND8(xor, A ^ B)
251 DEFINE_BLEND8(vividlight, (A < 128) ? BURN(2 * A, B) : DODGE(2 * (A - 128), B))
252 DEFINE_BLEND8(linearlight,av_clip_uint8((B < 128) ? B + 2 * A - 255 : B + 2 * (A - 128)))
253 
254 #undef MULTIPLY
255 #undef SCREEN
256 #undef BURN
257 #undef DODGE
258 
259 #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))
260 #define SCREEN(x, a, b) (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))
261 #define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))
262 #define DODGE(a, b) (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))
263 
264 DEFINE_BLEND16(addition, FFMIN(65535, A + B))
265 DEFINE_BLEND16(average, (A + B) / 2)
266 DEFINE_BLEND16(subtract, FFMAX(0, A - B))
267 DEFINE_BLEND16(multiply, MULTIPLY(1, A, B))
268 DEFINE_BLEND16(negation, 65535 - FFABS(65535 - A - B))
269 DEFINE_BLEND16(difference, FFABS(A - B))
270 DEFINE_BLEND16(difference128, av_clip_uint16(32768 + A - B))
271 DEFINE_BLEND16(screen, SCREEN(1, A, B))
272 DEFINE_BLEND16(overlay, (A < 32768) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
273 DEFINE_BLEND16(hardlight, (B < 32768) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
274 DEFINE_BLEND16(hardmix, (A < (65535 - B)) ? 0: 65535)
275 DEFINE_BLEND16(darken, FFMIN(A, B))
276 DEFINE_BLEND16(lighten, FFMAX(A, B))
277 DEFINE_BLEND16(divide, av_clip_uint16(((float)A / ((float)B) * 65535)))
278 DEFINE_BLEND16(dodge, DODGE(A, B))
279 DEFINE_BLEND16(burn, BURN(A, B))
280 DEFINE_BLEND16(softlight, (A > 32767) ? B + (65535 - B) * (A - 32767.5) / 32767.5 * (0.5 - FFABS(B - 32767.5) / 65535): B - B * ((32767.5 - A) / 32767.5) * (0.5 - FFABS(B - 32767.5)/65535))
281 DEFINE_BLEND16(exclusion, A + B - 2 * A * B / 65535)
282 DEFINE_BLEND16(pinlight, (B < 32768) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 32768)))
283 DEFINE_BLEND16(phoenix, FFMIN(A, B) - FFMAX(A, B) + 65535)
284 DEFINE_BLEND16(reflect, (B == 65535) ? B : FFMIN(65535, (A * A / (65535 - B))))
285 DEFINE_BLEND16(glow, (A == 65535) ? A : FFMIN(65535, (B * B / (65535 - A))))
286 DEFINE_BLEND16(and, A & B)
287 DEFINE_BLEND16(or, A | B)
288 DEFINE_BLEND16(xor, A ^ B)
289 DEFINE_BLEND16(vividlight, (A < 32768) ? BURN(2 * A, B) : DODGE(2 * (A - 32768), B))
290 DEFINE_BLEND16(linearlight,av_clip_uint16((B < 32768) ? B + 2 * A - 65535 : B + 2 * (A - 32768)))
291 
292 #define DEFINE_BLEND_EXPR(type, name, div) \
293 static void blend_expr_## name(const uint8_t *_top, int top_linesize, \
294  const uint8_t *_bottom, int bottom_linesize, \
295  uint8_t *_dst, int dst_linesize, \
296  int width, int start, int end, \
297  FilterParams *param, double *values) \
298 { \
299  const type *top = (type*)_top; \
300  const type *bottom = (type*)_bottom; \
301  type *dst = (type*)_dst; \
302  AVExpr *e = param->e; \
303  int y, x; \
304  dst_linesize /= div; \
305  top_linesize /= div; \
306  bottom_linesize /= div; \
307  \
308  for (y = start; y < end; y++) { \
309  values[VAR_Y] = y; \
310  for (x = 0; x < width; x++) { \
311  values[VAR_X] = x; \
312  values[VAR_TOP] = values[VAR_A] = top[x]; \
313  values[VAR_BOTTOM] = values[VAR_B] = bottom[x]; \
314  dst[x] = av_expr_eval(e, values, NULL); \
315  } \
316  dst += dst_linesize; \
317  top += top_linesize; \
318  bottom += bottom_linesize; \
319  } \
320 }
321 
322 DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
323 DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
324 
325 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
326 {
327  ThreadData *td = arg;
328  int slice_start = (td->h * jobnr ) / nb_jobs;
329  int slice_end = (td->h * (jobnr+1)) / nb_jobs;
330  const uint8_t *top = td->top->data[td->plane];
331  const uint8_t *bottom = td->bottom->data[td->plane];
332  uint8_t *dst = td->dst->data[td->plane];
333  double values[VAR_VARS_NB];
334 
335  values[VAR_N] = td->inlink->frame_count;
336  values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
337  values[VAR_W] = td->w;
338  values[VAR_H] = td->h;
339  values[VAR_SW] = td->w / (double)td->dst->width;
340  values[VAR_SH] = td->h / (double)td->dst->height;
341 
342  td->param->blend(top + slice_start * td->top->linesize[td->plane],
343  td->top->linesize[td->plane],
344  bottom + slice_start * td->bottom->linesize[td->plane],
345  td->bottom->linesize[td->plane],
346  dst + slice_start * td->dst->linesize[td->plane],
347  td->dst->linesize[td->plane],
348  td->w, slice_start, slice_end, td->param, &values[0]);
349  return 0;
350 }
351 
352 static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
353  const AVFrame *bottom_buf)
354 {
355  BlendContext *s = ctx->priv;
356  AVFilterLink *inlink = ctx->inputs[0];
357  AVFilterLink *outlink = ctx->outputs[0];
358  AVFrame *dst_buf;
359  int plane;
360 
361  dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
362  if (!dst_buf)
363  return top_buf;
364  av_frame_copy_props(dst_buf, top_buf);
365 
366  for (plane = 0; plane < s->nb_planes; plane++) {
367  int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
368  int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
369  int outw = FF_CEIL_RSHIFT(dst_buf->width, hsub);
370  int outh = FF_CEIL_RSHIFT(dst_buf->height, vsub);
371  FilterParams *param = &s->params[plane];
372  ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
373  .w = outw, .h = outh, .param = param, .plane = plane,
374  .inlink = inlink };
375 
376  ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ctx->graph->nb_threads));
377  }
378 
379  if (!s->tblend)
380  av_frame_free(&top_buf);
381 
382  return dst_buf;
383 }
384 
385 static av_cold int init(AVFilterContext *ctx)
386 {
387  BlendContext *s = ctx->priv;
388 
389  s->tblend = !strcmp(ctx->filter->name, "tblend");
390 
391  s->dinput.process = blend_frame;
392  return 0;
393 }
394 
395 static int query_formats(AVFilterContext *ctx)
396 {
397  static const enum AVPixelFormat pix_fmts[] = {
398  AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
399  AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
400  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
401  AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
402  AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
403  AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
404  AV_PIX_FMT_GBRP16, AV_PIX_FMT_GRAY16,
405  AV_PIX_FMT_NONE
406  };
407 
408  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
409  if (!fmts_list)
410  return AVERROR(ENOMEM);
411  return ff_set_common_formats(ctx, fmts_list);
412 }
413 
414 static av_cold void uninit(AVFilterContext *ctx)
415 {
416  BlendContext *s = ctx->priv;
417  int i;
418 
419  ff_dualinput_uninit(&s->dinput);
420  av_frame_free(&s->prev_frame);
421 
422  for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
423  av_expr_free(s->params[i].e);
424 }
425 
426 static int config_output(AVFilterLink *outlink)
427 {
428  AVFilterContext *ctx = outlink->src;
429  AVFilterLink *toplink = ctx->inputs[TOP];
430  BlendContext *s = ctx->priv;
431  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
432  int ret, plane, is_16bit;
433 
434  if (!s->tblend) {
435  AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
436 
437  if (toplink->format != bottomlink->format) {
438  av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
439  return AVERROR(EINVAL);
440  }
441  if (toplink->w != bottomlink->w ||
442  toplink->h != bottomlink->h ||
443  toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
444  toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
445  av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
446  "(size %dx%d, SAR %d:%d) do not match the corresponding "
447  "second input link %s parameters (%dx%d, SAR %d:%d)\n",
448  ctx->input_pads[TOP].name, toplink->w, toplink->h,
449  toplink->sample_aspect_ratio.num,
450  toplink->sample_aspect_ratio.den,
451  ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
452  bottomlink->sample_aspect_ratio.num,
453  bottomlink->sample_aspect_ratio.den);
454  return AVERROR(EINVAL);
455  }
456  }
457 
458  outlink->w = toplink->w;
459  outlink->h = toplink->h;
460  outlink->time_base = toplink->time_base;
461  outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
462  outlink->frame_rate = toplink->frame_rate;
463 
464  s->hsub = pix_desc->log2_chroma_w;
465  s->vsub = pix_desc->log2_chroma_h;
466 
467  is_16bit = pix_desc->comp[0].depth_minus1 == 15;
468  s->nb_planes = av_pix_fmt_count_planes(toplink->format);
469 
470  if (s->tblend)
471  outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
472  else if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
473  return ret;
474 
475  for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
476  FilterParams *param = &s->params[plane];
477 
478  if (s->all_mode >= 0)
479  param->mode = s->all_mode;
480  if (s->all_opacity < 1)
481  param->opacity = s->all_opacity;
482 
483  switch (param->mode) {
484  case BLEND_ADDITION: param->blend = is_16bit ? blend_addition_16bit : blend_addition_8bit; break;
485  case BLEND_AND: param->blend = is_16bit ? blend_and_16bit : blend_and_8bit; break;
486  case BLEND_AVERAGE: param->blend = is_16bit ? blend_average_16bit : blend_average_8bit; break;
487  case BLEND_BURN: param->blend = is_16bit ? blend_burn_16bit : blend_burn_8bit; break;
488  case BLEND_DARKEN: param->blend = is_16bit ? blend_darken_16bit : blend_darken_8bit; break;
489  case BLEND_DIFFERENCE: param->blend = is_16bit ? blend_difference_16bit : blend_difference_8bit; break;
490  case BLEND_DIFFERENCE128: param->blend = is_16bit ? blend_difference128_16bit: blend_difference128_8bit; break;
491  case BLEND_DIVIDE: param->blend = is_16bit ? blend_divide_16bit : blend_divide_8bit; break;
492  case BLEND_DODGE: param->blend = is_16bit ? blend_dodge_16bit : blend_dodge_8bit; break;
493  case BLEND_EXCLUSION: param->blend = is_16bit ? blend_exclusion_16bit : blend_exclusion_8bit; break;
494  case BLEND_GLOW: param->blend = is_16bit ? blend_glow_16bit : blend_glow_8bit; break;
495  case BLEND_HARDLIGHT: param->blend = is_16bit ? blend_hardlight_16bit : blend_hardlight_8bit; break;
496  case BLEND_HARDMIX: param->blend = is_16bit ? blend_hardmix_16bit : blend_hardmix_8bit; break;
497  case BLEND_LIGHTEN: param->blend = is_16bit ? blend_lighten_16bit : blend_lighten_8bit; break;
498  case BLEND_LINEARLIGHT:param->blend = is_16bit ? blend_linearlight_16bit: blend_linearlight_8bit;break;
499  case BLEND_MULTIPLY: param->blend = is_16bit ? blend_multiply_16bit : blend_multiply_8bit; break;
500  case BLEND_NEGATION: param->blend = is_16bit ? blend_negation_16bit : blend_negation_8bit; break;
501  case BLEND_NORMAL: param->blend = blend_normal; break;
502  case BLEND_OR: param->blend = is_16bit ? blend_or_16bit : blend_or_8bit; break;
503  case BLEND_OVERLAY: param->blend = is_16bit ? blend_overlay_16bit : blend_overlay_8bit; break;
504  case BLEND_PHOENIX: param->blend = is_16bit ? blend_phoenix_16bit : blend_phoenix_8bit; break;
505  case BLEND_PINLIGHT: param->blend = is_16bit ? blend_pinlight_16bit : blend_pinlight_8bit; break;
506  case BLEND_REFLECT: param->blend = is_16bit ? blend_reflect_16bit : blend_reflect_8bit; break;
507  case BLEND_SCREEN: param->blend = is_16bit ? blend_screen_16bit : blend_screen_8bit; break;
508  case BLEND_SOFTLIGHT: param->blend = is_16bit ? blend_softlight_16bit : blend_softlight_8bit; break;
509  case BLEND_SUBTRACT: param->blend = is_16bit ? blend_subtract_16bit : blend_subtract_8bit; break;
510  case BLEND_VIVIDLIGHT: param->blend = is_16bit ? blend_vividlight_16bit : blend_vividlight_8bit; break;
511  case BLEND_XOR: param->blend = is_16bit ? blend_xor_16bit : blend_xor_8bit; break;
512  }
513 
514  if (s->all_expr && !param->expr_str) {
515  param->expr_str = av_strdup(s->all_expr);
516  if (!param->expr_str)
517  return AVERROR(ENOMEM);
518  }
519  if (param->expr_str) {
520  ret = av_expr_parse(&param->e, param->expr_str, var_names,
521  NULL, NULL, NULL, NULL, 0, ctx);
522  if (ret < 0)
523  return ret;
524  param->blend = is_16bit? blend_expr_16bit : blend_expr_8bit;
525  }
526  }
527 
528  return 0;
529 }
530 
531 #if CONFIG_BLEND_FILTER
532 
533 static int request_frame(AVFilterLink *outlink)
534 {
535  BlendContext *s = outlink->src->priv;
536  return ff_dualinput_request_frame(&s->dinput, outlink);
537 }
538 
539 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
540 {
541  BlendContext *s = inlink->dst->priv;
542  return ff_dualinput_filter_frame(&s->dinput, inlink, buf);
543 }
544 
545 static const AVFilterPad blend_inputs[] = {
546  {
547  .name = "top",
548  .type = AVMEDIA_TYPE_VIDEO,
549  .filter_frame = filter_frame,
550  },{
551  .name = "bottom",
552  .type = AVMEDIA_TYPE_VIDEO,
553  .filter_frame = filter_frame,
554  },
555  { NULL }
556 };
557 
558 static const AVFilterPad blend_outputs[] = {
559  {
560  .name = "default",
561  .type = AVMEDIA_TYPE_VIDEO,
562  .config_props = config_output,
563  .request_frame = request_frame,
564  },
565  { NULL }
566 };
567 
568 AVFilter ff_vf_blend = {
569  .name = "blend",
570  .description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
571  .init = init,
572  .uninit = uninit,
573  .priv_size = sizeof(BlendContext),
574  .query_formats = query_formats,
575  .inputs = blend_inputs,
576  .outputs = blend_outputs,
577  .priv_class = &blend_class,
578  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
579 };
580 
581 #endif
582 
583 #if CONFIG_TBLEND_FILTER
584 
585 static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
586 {
587  BlendContext *s = inlink->dst->priv;
588  AVFilterLink *outlink = inlink->dst->outputs[0];
589 
590  if (s->prev_frame) {
591  AVFrame *out = blend_frame(inlink->dst, frame, s->prev_frame);
592  av_frame_free(&s->prev_frame);
593  s->prev_frame = frame;
594  return ff_filter_frame(outlink, out);
595  }
596  s->prev_frame = frame;
597  return 0;
598 }
599 
600 static const AVOption tblend_options[] = {
601  COMMON_OPTIONS,
602  { NULL }
603 };
604 
605 AVFILTER_DEFINE_CLASS(tblend);
606 
607 static const AVFilterPad tblend_inputs[] = {
608  {
609  .name = "default",
610  .type = AVMEDIA_TYPE_VIDEO,
611  .filter_frame = tblend_filter_frame,
612  },
613  { NULL }
614 };
615 
616 static const AVFilterPad tblend_outputs[] = {
617  {
618  .name = "default",
619  .type = AVMEDIA_TYPE_VIDEO,
620  .config_props = config_output,
621  },
622  { NULL }
623 };
624 
625 AVFilter ff_vf_tblend = {
626  .name = "tblend",
627  .description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
628  .priv_size = sizeof(BlendContext),
629  .priv_class = &tblend_class,
630  .query_formats = query_formats,
631  .init = init,
632  .uninit = uninit,
633  .inputs = tblend_inputs,
634  .outputs = tblend_outputs,
635  .flags = AVFILTER_FLAG_SLICE_THREADS,
636 };
637 
638 #endif
BlendContext::dinput
FFDualInputContext dinput
Definition: vf_blend.c:94
BLEND_OR
Definition: vf_blend.c:52
plane
int plane
Definition: avisynth_c.h:291
blend_frame
static AVFrame * blend_frame(AVFilterContext *ctx, AVFrame *top_buf, const AVFrame *bottom_buf)
Definition: vf_blend.c:352
FilterParams::e
AVExpr * e
Definition: vf_blend.c:74
blend_options
static const AVOption blend_options[]
Definition: vf_blend.c:154
NULL
#define NULL
Definition: coverity.c:32
BLEND_LIGHTEN
Definition: vf_blend.c:49
AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:415
s
const char * s
Definition: avisynth_c.h:631
var_names
static const char *const var_names[]
Definition: vf_blend.c:68
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2129
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
FilterParams::opacity
double opacity
Definition: vf_blend.c:73
AVOption
AVOption.
Definition: opt.h:255
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(blend)
BlendContext::all_mode
enum BlendMode all_mode
Definition: vf_blend.c:98
FilterParams::blend
void(* blend)(const uint8_t *top, int top_linesize, const uint8_t *bottom, int bottom_linesize, uint8_t *dst, int dst_linesize, int width, int start, int end, struct FilterParams *param, double *values)
Definition: vf_blend.c:76
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
imgutils.h
misc image utilities
outputs
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
DEFINE_BLEND_EXPR
#define DEFINE_BLEND_EXPR(type, name, div)
VAR_TOP
Definition: vf_blend.c:69
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2169
avfilter.h
Main libavfilter public API header.
AV_OPT_TYPE_INT
Definition: opt.h:223
AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:188
AVRational::num
int num
numerator
Definition: rational.h:44
BLEND_MULTIPLY
Definition: vf_blend.c:50
BLEND_BURN
Definition: vf_blend.c:41
DODGE
#define DODGE(a, b)
Definition: vf_blend.c:224
BURN
#define BURN(a, b)
Definition: vf_blend.c:223
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:653
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:109
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_blend.c:414
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
BLEND_NEGATION
Definition: vf_blend.c:51
VAR_VARS_NB
Definition: vf_blend.c:69
VAR_BOTTOM
Definition: vf_blend.c:69
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
AVFilterContext::graph
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:656
BLEND_REFLECT
Definition: vf_blend.c:56
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:69
VAR_B
Definition: vf_blend.c:69
ff_dualinput_filter_frame
int ff_dualinput_filter_frame(FFDualInputContext *s, AVFilterLink *inlink, AVFrame *in)
Definition: dualinput.c:73
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:641
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1158
AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:103
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:100
uint8_t
uint8_t
Definition: audio_convert.c:194
FilterParams::expr_str
char * expr_str
Definition: vf_blend.c:75
av_cold
#define av_cold
Definition: attributes.h:74
BLEND_DIVIDE
Definition: vf_blend.c:45
BLEND_HARDMIX
Definition: vf_blend.c:62
opt.h
AVOptions.
BLEND_EXCLUSION
Definition: vf_blend.c:47
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
BLEND_DODGE
Definition: vf_blend.c:46
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:257
ThreadData::bottom
const AVFrame * bottom
Definition: vf_blend.c:84
AVExpr
Definition: eval.c:144
BLEND_DIFFERENCE
Definition: vf_blend.c:43
OFFSET
#define OFFSET(x)
Definition: vf_blend.c:151
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
FilterParams::mode
enum BlendMode mode
Definition: vf_blend.c:72
av_q2d
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
ThreadData::plane
int plane
Definition: vf_blend.c:87
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:102
AVFilterGraph::nb_threads
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:1207
BLEND_SUBTRACT
Definition: vf_blend.c:59
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:76
VAR_T
Definition: vf_blend.c:69
BOTTOM
#define BOTTOM
Definition: vf_blend.c:33
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:393
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_blend.c:426
BlendContext::params
FilterParams params[4]
Definition: vf_blend.c:101
ff_dualinput_uninit
void ff_dualinput_uninit(FFDualInputContext *s)
Definition: dualinput.c:84
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:414
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
VAR_A
Definition: vf_blend.c:69
BLEND_AND
Definition: vf_blend.c:39
BlendContext::prev_frame
AVFrame * prev_frame
Definition: vf_blend.c:103
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:63
AVFilterContext::input_pads
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:640
AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:281
AVComponentDescriptor::depth_minus1
uint16_t depth_minus1
Number of bits in the component minus 1.
Definition: pixdesc.h:57
AVFrame::width
int width
width and height of the video frame
Definition: frame.h:220
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:542
td
#define td
Definition: regdef.h:70
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
AVERROR
#define AVERROR(e)
Definition: error.h:43
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
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:175
BLEND_UNSET
Definition: vf_blend.c:36
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:654
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:442
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:416
arg
const char * arg
Definition: jacosubdec.c:66
params
GLenum GLint * params
Definition: opengl_enc.c:114
FLAGS
#define FLAGS
Definition: vf_blend.c:152
BLEND_HARDLIGHT
Definition: vf_blend.c:48
FFMAX
#define FFMAX(a, b)
Definition: common.h:79
BLEND_NB
Definition: vf_blend.c:65
BLEND_ADDITION
Definition: vf_blend.c:38
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
TOP
#define TOP
Definition: vf_blend.c:32
BlendMode
BlendMode
Definition: vf_blend.c:35
DEFINE_BLEND8
#define DEFINE_BLEND8(name, expr)
Definition: vf_blend.c:172
screen
static SDL_Surface * screen
Definition: ffplay.c:360
BLEND_LINEARLIGHT
Definition: vf_blend.c:63
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: aeval.c:274
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:399
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:364
FFMIN
#define FFMIN(a, b)
Definition: common.h:81
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:75
BLEND_SCREEN
Definition: vf_blend.c:57
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
BLEND_OVERLAY
Definition: vf_blend.c:53
FF_CEIL_RSHIFT
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: aeval.c:415
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:68
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_blend.c:385
VAR_Y
Definition: vf_blend.c:69
SCREEN
#define SCREEN(x, a, b)
Definition: vf_blend.c:222
B
#define B
Definition: vf_blend.c:219
FFDualInputContext::process
AVFrame *(* process)(AVFilterContext *ctx, AVFrame *main, const AVFrame *second)
Definition: dualinput.h:35
FF_LINK_FLAG_REQUEST_LOOP
Frame requests may need to loop in order to be fulfilled.
Definition: internal.h:374
ThreadData::param
FilterParams * param
Definition: vf_blend.c:89
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
VAR_H
Definition: vf_blend.c:69
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:391
VAR_SW
Definition: vf_blend.c:69
ThreadData::dst
AVFrame * dst
Definition: vf_blend.c:85
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:313
av_strdup
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:280
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
DEFINE_BLEND16
#define DEFINE_BLEND16(name, expr)
Definition: vf_blend.c:192
COMMON_OPTIONS
#define COMMON_OPTIONS
Definition: vf_blend.c:106
BLEND_DIFFERENCE128
Definition: vf_blend.c:44
buf
void * buf
Definition: avisynth_c.h:553
FilterParams
filter data
Definition: mlp.h:74
AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:69
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFilter
Filter definition.
Definition: avfilter.h:470
inputs
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:239
BLEND_PHOENIX
Definition: vf_blend.c:54
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:474
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:459
ff_dualinput_init
int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s)
Definition: dualinput.c:43
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
filter_slice
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_curves.c:484
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
AVFilterContext::internal
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:679
flags
static int flags
Definition: cpu.c:47
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
blend_normal
static void blend_normal(const uint8_t *top, int top_linesize, const uint8_t *bottom, int bottom_linesize, uint8_t *dst, int dst_linesize, int width, int start, int end, FilterParams *param, double *values)
Definition: vf_blend.c:163
BlendContext::nb_planes
int nb_planes
Definition: vf_blend.c:96
VAR_X
Definition: vf_blend.c:69
BlendContext::all_expr
char * all_expr
Definition: vf_blend.c:97
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:71
BlendContext::vsub
int vsub
chroma subsampling values
Definition: vf_blend.c:95
AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:299
BlendContext::all_opacity
double all_opacity
Definition: vf_blend.c:99
A
#define A
Definition: vf_blend.c:218
BLEND_VIVIDLIGHT
Definition: vf_blend.c:60
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:77
AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:70
AVRational::den
int den
denominator
Definition: rational.h:45
AVFilterInternal::execute
avfilter_execute_func * execute
Definition: internal.h:164
ThreadData::top
const AVFrame * top
Definition: vf_blend.c:84
BLEND_DARKEN
Definition: vf_blend.c:42
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2097
pixfmt.h
pixel format definitions
BLEND_PINLIGHT
Definition: vf_blend.c:55
BLEND_SOFTLIGHT
Definition: vf_blend.c:58
NAN
#define NAN
Definition: math.h:28
BLEND_NORMAL
Definition: vf_blend.c:37
VAR_N
Definition: vf_blend.c:69
dualinput.h
Double input streams helper for filters.
VAR_SH
Definition: vf_blend.c:69
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
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:302
out
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
Definition: audio_convert.c:194
AVFilterContext
An instance of a filter.
Definition: avfilter.h:633
ff_dualinput_request_frame
int ff_dualinput_request_frame(FFDualInputContext *s, AVFilterLink *outlink)
Definition: dualinput.c:79
AVFrame::height
int height
Definition: frame.h:220
BLEND_XOR
Definition: vf_blend.c:61
AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:101
start
void INT64 start
Definition: avisynth_c.h:553
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
BLEND_GLOW
Definition: vf_blend.c:64
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:273
BLEND_AVERAGE
Definition: vf_blend.c:40
ThreadData::inlink
AVFilterLink * inlink
Definition: vf_blend.c:86
internal.h
internal API functions
MULTIPLY
#define MULTIPLY(x, a, b)
Definition: vf_blend.c:221
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
AVFilterContext::filter
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:636
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:392
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_blend.c:395
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:553
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
VAR_W
Definition: vf_blend.c:69
eval.h
simple arithmetic expression evaluator
width
static int width
Definition: demuxing_decoding.c:39
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