FFmpeg
vf_xbr.c
Go to the documentation of this file.
1 /*
2  * This file is part of FFmpeg.
3  *
4  * Copyright (c) 2011, 2012 Hyllian/Jararaca <sergiogdb@gmail.com>
5  * Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * XBR Filter is used for depixelization of image.
25  * This is based on Hyllian's xBR shader.
26  *
27  * @see https://forums.libretro.com/t/xbr-algorithm-tutorial/123
28  * @see https://github.com/yoyofr/iFBA/blob/master/fba_src/src/intf/video/scalers/xbr.cpp
29  */
30 
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
33 #include "internal.h"
34 #include "video.h"
35 
36 #define LB_MASK 0x00FEFEFE
37 #define RED_BLUE_MASK 0x00FF00FF
38 #define GREEN_MASK 0x0000FF00
39 
40 #ifdef PI
41 #undef PI
42 #endif
43 
44 typedef int (*xbrfunc_t)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
45 
46 typedef struct XBRContext {
47  const AVClass *class;
48  int n;
49  xbrfunc_t func;
50  uint32_t rgbtoyuv[1<<24];
51 } XBRContext;
52 
53 typedef struct ThreadData {
54  AVFrame *in, *out;
55  const uint32_t *rgbtoyuv;
56 } ThreadData;
57 
58 #define OFFSET(x) offsetof(XBRContext, x)
59 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
60 static const AVOption xbr_options[] = {
61  { "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 4, .flags = FLAGS },
62  { NULL }
63 };
64 
65 AVFILTER_DEFINE_CLASS(xbr);
66 
67 static uint32_t pixel_diff(uint32_t x, uint32_t y, const uint32_t *r2y)
68 {
69 #define YMASK 0xff0000
70 #define UMASK 0x00ff00
71 #define VMASK 0x0000ff
72 #define ABSDIFF(a,b) (abs((int)(a)-(int)(b)))
73 
74  uint32_t yuv1 = r2y[x & 0xffffff];
75  uint32_t yuv2 = r2y[y & 0xffffff];
76 
77  return (ABSDIFF(yuv1 & YMASK, yuv2 & YMASK) >> 16) +
78  (ABSDIFF(yuv1 & UMASK, yuv2 & UMASK) >> 8) +
79  ABSDIFF(yuv1 & VMASK, yuv2 & VMASK);
80 }
81 
82 #define ALPHA_BLEND_128_W(a, b) ((((a) & LB_MASK) >> 1) + (((b) & LB_MASK) >> 1))
83 #define ALPHA_BLEND_BASE(a, b, m, s) ( (RED_BLUE_MASK & (((a) & RED_BLUE_MASK) + (((((b) & RED_BLUE_MASK) - ((a) & RED_BLUE_MASK)) * (m)) >> (s)))) \
84  | (GREEN_MASK & (((a) & GREEN_MASK) + (((((b) & GREEN_MASK) - ((a) & GREEN_MASK)) * (m)) >> (s)))))
85 #define ALPHA_BLEND_32_W(a, b) ALPHA_BLEND_BASE(a, b, 1, 3)
86 #define ALPHA_BLEND_64_W(a, b) ALPHA_BLEND_BASE(a, b, 1, 2)
87 #define ALPHA_BLEND_192_W(a, b) ALPHA_BLEND_BASE(a, b, 3, 2)
88 #define ALPHA_BLEND_224_W(a, b) ALPHA_BLEND_BASE(a, b, 7, 3)
89 
90 #define df(A, B) pixel_diff(A, B, r2y)
91 #define eq(A, B) (df(A, B) < 155)
92 
93 #define FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
94  N0, N1, N2, N3) do { \
95  if (PE != PH && PE != PF) { \
96  const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
97  const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
98  if (e <= i) { \
99  const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
100  if (e < i && (!eq(PF,PB) && !eq(PH,PD) || eq(PE,PI) \
101  && (!eq(PF,I4) && !eq(PH,I5)) \
102  || eq(PE,PG) || eq(PE,PC))) { \
103  const unsigned ke = df(PF,PG); \
104  const unsigned ki = df(PH,PC); \
105  const int left = ke<<1 <= ki && PE != PG && PD != PG; \
106  const int up = ke >= ki<<1 && PE != PC && PB != PC; \
107  if (left && up) { \
108  E[N3] = ALPHA_BLEND_224_W(E[N3], px); \
109  E[N2] = ALPHA_BLEND_64_W( E[N2], px); \
110  E[N1] = E[N2]; \
111  } else if (left) { \
112  E[N3] = ALPHA_BLEND_192_W(E[N3], px); \
113  E[N2] = ALPHA_BLEND_64_W( E[N2], px); \
114  } else if (up) { \
115  E[N3] = ALPHA_BLEND_192_W(E[N3], px); \
116  E[N1] = ALPHA_BLEND_64_W( E[N1], px); \
117  } else { /* diagonal */ \
118  E[N3] = ALPHA_BLEND_128_W(E[N3], px); \
119  } \
120  } else { \
121  E[N3] = ALPHA_BLEND_128_W(E[N3], px); \
122  } \
123  } \
124  } \
125 } while (0)
126 
127 #define FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
128  N0, N1, N2, N3, N4, N5, N6, N7, N8) do { \
129  if (PE != PH && PE != PF) { \
130  const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
131  const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
132  if (e <= i) { \
133  const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
134  if (e < i && (!eq(PF,PB) && !eq(PF,PC) || !eq(PH,PD) && !eq(PH,PG) || eq(PE,PI) \
135  && (!eq(PF,F4) && !eq(PF,I4) || !eq(PH,H5) && !eq(PH,I5)) \
136  || eq(PE,PG) || eq(PE,PC))) { \
137  const unsigned ke = df(PF,PG); \
138  const unsigned ki = df(PH,PC); \
139  const int left = ke<<1 <= ki && PE != PG && PD != PG; \
140  const int up = ke >= ki<<1 && PE != PC && PB != PC; \
141  if (left && up) { \
142  E[N7] = ALPHA_BLEND_192_W(E[N7], px); \
143  E[N6] = ALPHA_BLEND_64_W( E[N6], px); \
144  E[N5] = E[N7]; \
145  E[N2] = E[N6]; \
146  E[N8] = px; \
147  } else if (left) { \
148  E[N7] = ALPHA_BLEND_192_W(E[N7], px); \
149  E[N5] = ALPHA_BLEND_64_W( E[N5], px); \
150  E[N6] = ALPHA_BLEND_64_W( E[N6], px); \
151  E[N8] = px; \
152  } else if (up) { \
153  E[N5] = ALPHA_BLEND_192_W(E[N5], px); \
154  E[N7] = ALPHA_BLEND_64_W( E[N7], px); \
155  E[N2] = ALPHA_BLEND_64_W( E[N2], px); \
156  E[N8] = px; \
157  } else { /* diagonal */ \
158  E[N8] = ALPHA_BLEND_224_W(E[N8], px); \
159  E[N5] = ALPHA_BLEND_32_W( E[N5], px); \
160  E[N7] = ALPHA_BLEND_32_W( E[N7], px); \
161  } \
162  } else { \
163  E[N8] = ALPHA_BLEND_128_W(E[N8], px); \
164  } \
165  } \
166  } \
167 } while (0)
168 
169 #define FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
170  N15, N14, N11, N3, N7, N10, N13, N12, N9, N6, N2, N1, N5, N8, N4, N0) do { \
171  if (PE != PH && PE != PF) { \
172  const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
173  const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
174  if (e <= i) { \
175  const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
176  if (e < i && (!eq(PF,PB) && !eq(PH,PD) || eq(PE,PI) \
177  && (!eq(PF,I4) && !eq(PH,I5)) \
178  || eq(PE,PG) || eq(PE,PC))) { \
179  const unsigned ke = df(PF,PG); \
180  const unsigned ki = df(PH,PC); \
181  const int left = ke<<1 <= ki && PE != PG && PD != PG; \
182  const int up = ke >= ki<<1 && PE != PC && PB != PC; \
183  if (left && up) { \
184  E[N13] = ALPHA_BLEND_192_W(E[N13], px); \
185  E[N12] = ALPHA_BLEND_64_W( E[N12], px); \
186  E[N15] = E[N14] = E[N11] = px; \
187  E[N10] = E[N3] = E[N12]; \
188  E[N7] = E[N13]; \
189  } else if (left) { \
190  E[N11] = ALPHA_BLEND_192_W(E[N11], px); \
191  E[N13] = ALPHA_BLEND_192_W(E[N13], px); \
192  E[N10] = ALPHA_BLEND_64_W( E[N10], px); \
193  E[N12] = ALPHA_BLEND_64_W( E[N12], px); \
194  E[N14] = px; \
195  E[N15] = px; \
196  } else if (up) { \
197  E[N14] = ALPHA_BLEND_192_W(E[N14], px); \
198  E[N7 ] = ALPHA_BLEND_192_W(E[N7 ], px); \
199  E[N10] = ALPHA_BLEND_64_W( E[N10], px); \
200  E[N3 ] = ALPHA_BLEND_64_W( E[N3 ], px); \
201  E[N11] = px; \
202  E[N15] = px; \
203  } else { /* diagonal */ \
204  E[N11] = ALPHA_BLEND_128_W(E[N11], px); \
205  E[N14] = ALPHA_BLEND_128_W(E[N14], px); \
206  E[N15] = px; \
207  } \
208  } else { \
209  E[N15] = ALPHA_BLEND_128_W(E[N15], px); \
210  } \
211  } \
212  } \
213 } while (0)
214 
215 static av_always_inline void xbr_filter(const ThreadData *td, int jobnr, int nb_jobs, int n)
216 {
217  int x, y;
218  const AVFrame *input = td->in;
219  AVFrame *output = td->out;
220  const uint32_t *r2y = td->rgbtoyuv;
221  const int slice_start = (input->height * jobnr ) / nb_jobs;
222  const int slice_end = (input->height * (jobnr+1)) / nb_jobs;
223  const int nl = output->linesize[0] >> 2;
224  const int nl1 = nl + nl;
225  const int nl2 = nl1 + nl;
226 
227  for (y = slice_start; y < slice_end; y++) {
228 
229  uint32_t *E = (uint32_t *)(output->data[0] + y * output->linesize[0] * n);
230  const uint32_t *sa2 = (uint32_t *)(input->data[0] + y * input->linesize[0] - 8); /* center */
231  const uint32_t *sa1 = sa2 - (input->linesize[0]>>2); /* up x1 */
232  const uint32_t *sa0 = sa1 - (input->linesize[0]>>2); /* up x2 */
233  const uint32_t *sa3 = sa2 + (input->linesize[0]>>2); /* down x1 */
234  const uint32_t *sa4 = sa3 + (input->linesize[0]>>2); /* down x2 */
235 
236  if (y <= 1) {
237  sa0 = sa1;
238  if (y == 0) {
239  sa0 = sa1 = sa2;
240  }
241  }
242 
243  if (y >= input->height - 2) {
244  sa4 = sa3;
245  if (y == input->height - 1) {
246  sa4 = sa3 = sa2;
247  }
248  }
249 
250  for (x = 0; x < input->width; x++) {
251  const uint32_t B1 = sa0[2];
252  const uint32_t PB = sa1[2];
253  const uint32_t PE = sa2[2];
254  const uint32_t PH = sa3[2];
255  const uint32_t H5 = sa4[2];
256 
257  const int pprev = 2 - (x > 0);
258  const uint32_t A1 = sa0[pprev];
259  const uint32_t PA = sa1[pprev];
260  const uint32_t PD = sa2[pprev];
261  const uint32_t PG = sa3[pprev];
262  const uint32_t G5 = sa4[pprev];
263 
264  const int pprev2 = pprev - (x > 1);
265  const uint32_t A0 = sa1[pprev2];
266  const uint32_t D0 = sa2[pprev2];
267  const uint32_t G0 = sa3[pprev2];
268 
269  const int pnext = 3 - (x == input->width - 1);
270  const uint32_t C1 = sa0[pnext];
271  const uint32_t PC = sa1[pnext];
272  const uint32_t PF = sa2[pnext];
273  const uint32_t PI = sa3[pnext];
274  const uint32_t I5 = sa4[pnext];
275 
276  const int pnext2 = pnext + 1 - (x >= input->width - 2);
277  const uint32_t C4 = sa1[pnext2];
278  const uint32_t F4 = sa2[pnext2];
279  const uint32_t I4 = sa3[pnext2];
280 
281  if (n == 2) {
282  E[0] = E[1] = // 0, 1
283  E[nl] = E[nl + 1] = PE; // 2, 3
284 
285  FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, 0, 1, nl, nl+1);
286  FILT2(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, nl, 0, nl+1, 1);
287  FILT2(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, nl+1, nl, 1, 0);
288  FILT2(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, 1, nl+1, 0, nl);
289  } else if (n == 3) {
290  E[0] = E[1] = E[2] = // 0, 1, 2
291  E[nl] = E[nl+1] = E[nl+2] = // 3, 4, 5
292  E[nl1] = E[nl1+1] = E[nl1+2] = PE; // 6, 7, 8
293 
294  FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, 0, 1, 2, nl, nl+1, nl+2, nl1, nl1+1, nl1+2);
295  FILT3(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, nl1, nl, 0, nl1+1, nl+1, 1, nl1+2, nl+2, 2);
296  FILT3(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, nl1+2, nl1+1, nl1, nl+2, nl+1, nl, 2, 1, 0);
297  FILT3(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, 2, nl+2, nl1+2, 1, nl+1, nl1+1, 0, nl, nl1);
298  } else if (n == 4) {
299  E[0] = E[1] = E[2] = E[3] = // 0, 1, 2, 3
300  E[nl] = E[nl+1] = E[nl+2] = E[nl+3] = // 4, 5, 6, 7
301  E[nl1] = E[nl1+1] = E[nl1+2] = E[nl1+3] = // 8, 9, 10, 11
302  E[nl2] = E[nl2+1] = E[nl2+2] = E[nl2+3] = PE; // 12, 13, 14, 15
303 
304  FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, nl2+3, nl2+2, nl1+3, 3, nl+3, nl1+2, nl2+1, nl2, nl1+1, nl+2, 2, 1, nl+1, nl1, nl, 0);
305  FILT4(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, 3, nl+3, 2, 0, 1, nl+2, nl1+3, nl2+3, nl1+2, nl+1, nl, nl1, nl1+1, nl2+2, nl2+1, nl2);
306  FILT4(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, 0, 1, nl, nl2, nl1, nl+1, 2, 3, nl+2, nl1+1, nl2+1, nl2+2, nl1+2, nl+3, nl1+3, nl2+3);
307  FILT4(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, nl2, nl1, nl2+1, nl2+3, nl2+2, nl1+1, nl, 0, nl+1, nl1+2, nl1+3, nl+3, nl+2, 1, 2, 3);
308  }
309 
310  sa0 += 1;
311  sa1 += 1;
312  sa2 += 1;
313  sa3 += 1;
314  sa4 += 1;
315 
316  E += n;
317  }
318  }
319 }
320 
321 #define XBR_FUNC(size) \
322 static int xbr##size##x(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
323 { \
324  xbr_filter(arg, jobnr, nb_jobs, size); \
325  return 0; \
326 }
327 
328 XBR_FUNC(2)
329 XBR_FUNC(3)
330 XBR_FUNC(4)
331 
332 
333 static int config_output(AVFilterLink *outlink)
334 {
335  AVFilterContext *ctx = outlink->src;
336  XBRContext *s = ctx->priv;
337  AVFilterLink *inlink = ctx->inputs[0];
338 
339  outlink->w = inlink->w * s->n;
340  outlink->h = inlink->h * s->n;
341  return 0;
342 }
343 
344 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
345 {
346  AVFilterContext *ctx = inlink->dst;
347  AVFilterLink *outlink = ctx->outputs[0];
348  XBRContext *s = ctx->priv;
349  ThreadData td;
350 
351  AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
352  if (!out) {
353  av_frame_free(&in);
354  return AVERROR(ENOMEM);
355  }
356 
357  av_frame_copy_props(out, in);
358 
359  td.in = in;
360  td.out = out;
361  td.rgbtoyuv = s->rgbtoyuv;
362  ff_filter_execute(ctx, s->func, &td, NULL,
363  FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
364 
365  out->width = outlink->w;
366  out->height = outlink->h;
367 
368  av_frame_free(&in);
369  return ff_filter_frame(outlink, out);
370 }
371 
372 static av_cold int init(AVFilterContext *ctx)
373 {
374  XBRContext *s = ctx->priv;
375  static const xbrfunc_t xbrfuncs[] = {xbr2x, xbr3x, xbr4x};
376 
377  uint32_t c;
378  int bg, rg, g;
379 
380  for (bg = -255; bg < 256; bg++) {
381  for (rg = -255; rg < 256; rg++) {
382  const uint32_t u = (uint32_t)((-169*rg + 500*bg)/1000) + 128;
383  const uint32_t v = (uint32_t)(( 500*rg - 81*bg)/1000) + 128;
384  int startg = FFMAX3(-bg, -rg, 0);
385  int endg = FFMIN3(255-bg, 255-rg, 255);
386  uint32_t y = (uint32_t)(( 299*rg + 1000*startg + 114*bg)/1000);
387  c = bg + rg * (1 << 16) + 0x010101 * startg;
388  for (g = startg; g <= endg; g++) {
389  s->rgbtoyuv[c] = ((y++) << 16) + (u << 8) + v;
390  c+= 0x010101;
391  }
392  }
393  }
394 
395  s->func = xbrfuncs[s->n - 2];
396  return 0;
397 }
398 
399 static const AVFilterPad xbr_inputs[] = {
400  {
401  .name = "default",
402  .type = AVMEDIA_TYPE_VIDEO,
403  .filter_frame = filter_frame,
404  },
405 };
406 
407 static const AVFilterPad xbr_outputs[] = {
408  {
409  .name = "default",
410  .type = AVMEDIA_TYPE_VIDEO,
411  .config_props = config_output,
412  },
413 };
414 
415 const AVFilter ff_vf_xbr = {
416  .name = "xbr",
417  .description = NULL_IF_CONFIG_SMALL("Scale the input using xBR algorithm."),
418  FILTER_INPUTS(xbr_inputs),
419  FILTER_OUTPUTS(xbr_outputs),
420  FILTER_SINGLE_PIXFMT(AV_PIX_FMT_0RGB32),
421  .priv_size = sizeof(XBRContext),
422  .priv_class = &xbr_class,
423  .init = init,
424  .flags = AVFILTER_FLAG_SLICE_THREADS,
425 };
ff_vf_xbr
const AVFilter ff_vf_xbr
Definition: vf_xbr.c:415
VMASK
#define VMASK
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:108
td
#define td
Definition: regdef.h:70
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
B1
#define B1
Definition: faandct.c:42
out
FILE * out
Definition: movenc.c:54
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:250
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
xbr_outputs
static const AVFilterPad xbr_outputs[]
Definition: vf_xbr.c:407
output
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
Definition: filter_design.txt:225
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
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:100
test::height
int height
Definition: vc1dsp.c:39
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
pixdesc.h
C4
#define C4
Definition: mpegaudiodec_template.c:318
AVOption
AVOption.
Definition: opt.h:251
xbr_inputs
static const AVFilterPad xbr_inputs[]
Definition: vf_xbr.c:399
PD
#define PD(a, b)
Pack two delta values (a,b) into one 16-bit word according with endianness of the host machine.
Definition: indeo3data.h:290
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:526
video.h
ThreadData::in
AVFrame * in
Definition: af_adecorrelate.c:153
ABSDIFF
#define ABSDIFF(a, b)
xbr_options
static const AVOption xbr_options[]
Definition: vf_xbr.c:60
C1
#define C1
Definition: mpegaudiodsp_template.c:238
XBRContext::n
int n
Definition: vf_xbr.c:48
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:47
xbrfunc_t
int(* xbrfunc_t)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_xbr.c:44
XBRContext::rgbtoyuv
uint32_t rgbtoyuv[1<< 24]
Definition: vf_xbr.c:50
XBRContext::func
xbrfunc_t func
Definition: vf_xbr.c:49
av_cold
#define av_cold
Definition: attributes.h:90
YMASK
#define YMASK
s
#define s(width, name)
Definition: cbs_vp9.c:198
g
const char * g
Definition: vf_curves.c:127
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:1979
FLAGS
#define FLAGS
Definition: vf_xbr.c:59
ctx
AVFormatContext * ctx
Definition: movenc.c:48
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:192
E
#define E
Definition: avdct.c:32
arg
const char * arg
Definition: jacosubdec.c:67
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:736
PF
#define PF(suf)
xbr_filter
static av_always_inline void xbr_filter(const ThreadData *td, int jobnr, int nb_jobs, int n)
Definition: vf_xbr.c:215
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
XBRContext
Definition: vf_xbr.c:46
test::width
int width
Definition: vc1dsp.c:38
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:106
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_xbr.c:333
ThreadData::rgbtoyuv
const uint32_t * rgbtoyuv
Definition: vf_hqx.c:47
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
internal.h
FILTER_SINGLE_PIXFMT
#define FILTER_SINGLE_PIXFMT(pix_fmt_)
Definition: internal.h:182
UMASK
#define UMASK
FFMIN3
#define FFMIN3(a, b, c)
Definition: macros.h:50
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:786
ThreadData
Used for passing data between threads.
Definition: dsddec.c:69
av_always_inline
#define av_always_inline
Definition: attributes.h:49
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:53
XBR_FUNC
#define XBR_FUNC(size)
Definition: vf_xbr.c:321
AVFilter
Filter definition.
Definition: avfilter.h:166
AV_PIX_FMT_0RGB32
#define AV_PIX_FMT_0RGB32
Definition: pixfmt.h:445
FILT4
#define FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, N15, N14, N11, N3, N7, N10, N13, N12, N9, N6, N2, N1, N5, N8, N4, N0)
Definition: vf_xbr.c:169
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_xbr.c:344
AVFilterContext
An instance of a filter.
Definition: avfilter.h:397
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
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
pixel_diff
static uint32_t pixel_diff(uint32_t x, uint32_t y, const uint32_t *r2y)
Definition: vf_xbr.c:67
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_xbr.c:372
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:193
FFMAX3
#define FFMAX3(a, b, c)
Definition: macros.h:48
A1
#define A1
Definition: binkdsp.c:31
OFFSET
#define OFFSET(x)
Definition: vf_xbr.c:58
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(xbr)
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:144
int
int
Definition: ffmpeg_filter.c:368
FILT2
#define FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, N0, N1, N2, N3)
Definition: vf_xbr.c:93
FILT3
#define FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, N0, N1, N2, N3, N4, N5, N6, N7, N8)
Definition: vf_xbr.c:127
Generated on Thu Apr 18 2024 22:42:31 for FFmpeg by   doxygen 1.8.17