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vf_lut.c
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1 /*
2  * Copyright (c) 2011 Stefano Sabatini
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 /**
22  * @file
23  * Compute a look-up table for binding the input value to the output
24  * value, and apply it to input video.
25  */
26 
27 #include "libavutil/attributes.h"
28 #include "libavutil/common.h"
29 #include "libavutil/eval.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
32 #include "avfilter.h"
33 #include "drawutils.h"
34 #include "formats.h"
35 #include "internal.h"
36 #include "video.h"
37 
38 static const char *const var_names[] = {
39  "w", ///< width of the input video
40  "h", ///< height of the input video
41  "val", ///< input value for the pixel
42  "maxval", ///< max value for the pixel
43  "minval", ///< min value for the pixel
44  "negval", ///< negated value
45  "clipval",
46  NULL
47 };
48 
49 enum var_name {
58 };
59 
60 typedef struct LutContext {
61  const AVClass *class;
62  uint8_t lut[4][256]; ///< lookup table for each component
63  char *comp_expr_str[4];
65  int hsub, vsub;
67  int is_rgb, is_yuv;
68  int step;
69  int negate_alpha; /* only used by negate */
70 } LutContext;
71 
72 #define Y 0
73 #define U 1
74 #define V 2
75 #define R 0
76 #define G 1
77 #define B 2
78 #define A 3
79 
80 #define OFFSET(x) offsetof(LutContext, x)
81 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
82 
83 static const AVOption options[] = {
84  { "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
85  { "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
86  { "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
87  { "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
88  { "y", "set Y expression", OFFSET(comp_expr_str[Y]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
89  { "u", "set U expression", OFFSET(comp_expr_str[U]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
90  { "v", "set V expression", OFFSET(comp_expr_str[V]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
91  { "r", "set R expression", OFFSET(comp_expr_str[R]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
92  { "g", "set G expression", OFFSET(comp_expr_str[G]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
93  { "b", "set B expression", OFFSET(comp_expr_str[B]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
94  { "a", "set A expression", OFFSET(comp_expr_str[A]), AV_OPT_TYPE_STRING, { .str = "val" }, .flags = FLAGS },
95  { NULL }
96 };
97 
98 static av_cold void uninit(AVFilterContext *ctx)
99 {
100  LutContext *s = ctx->priv;
101  int i;
102 
103  for (i = 0; i < 4; i++) {
104  av_expr_free(s->comp_expr[i]);
105  s->comp_expr[i] = NULL;
106  av_freep(&s->comp_expr_str[i]);
107  }
108 }
109 
110 #define YUV_FORMATS \
111  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, \
112  AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, \
113  AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, \
114  AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, \
115  AV_PIX_FMT_YUVJ440P
116 
117 #define RGB_FORMATS \
118  AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA, \
119  AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, \
120  AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24
121 
125 
127 {
128  LutContext *s = ctx->priv;
129 
130  const enum AVPixelFormat *pix_fmts = s->is_rgb ? rgb_pix_fmts :
131  s->is_yuv ? yuv_pix_fmts :
132  all_pix_fmts;
133 
135  return 0;
136 }
137 
138 /**
139  * Clip value val in the minval - maxval range.
140  */
141 static double clip(void *opaque, double val)
142 {
143  LutContext *s = opaque;
144  double minval = s->var_values[VAR_MINVAL];
145  double maxval = s->var_values[VAR_MAXVAL];
146 
147  return av_clip(val, minval, maxval);
148 }
149 
150 /**
151  * Compute gamma correction for value val, assuming the minval-maxval
152  * range, val is clipped to a value contained in the same interval.
153  */
154 static double compute_gammaval(void *opaque, double gamma)
155 {
156  LutContext *s = opaque;
157  double val = s->var_values[VAR_CLIPVAL];
158  double minval = s->var_values[VAR_MINVAL];
159  double maxval = s->var_values[VAR_MAXVAL];
160 
161  return pow((val-minval)/(maxval-minval), gamma) * (maxval-minval)+minval;
162 }
163 
164 /**
165  * Compute ITU Rec.709 gamma correction of value val.
166  */
167 static double compute_gammaval709(void *opaque, double gamma)
168 {
169  LutContext *s = opaque;
170  double val = s->var_values[VAR_CLIPVAL];
171  double minval = s->var_values[VAR_MINVAL];
172  double maxval = s->var_values[VAR_MAXVAL];
173  double level = (val - minval) / (maxval - minval);
174  level = level < 0.018 ? 4.5 * level
175  : 1.099 * pow(level, 1.0 / gamma) - 0.099;
176  return level * (maxval - minval) + minval;
177 }
178 
179 static double (* const funcs1[])(void *, double) = {
180  (void *)clip,
181  (void *)compute_gammaval,
182  (void *)compute_gammaval709,
183  NULL
184 };
185 
186 static const char * const funcs1_names[] = {
187  "clip",
188  "gammaval",
189  "gammaval709",
190  NULL
191 };
192 
193 static int config_props(AVFilterLink *inlink)
194 {
195  AVFilterContext *ctx = inlink->dst;
196  LutContext *s = ctx->priv;
197  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
198  uint8_t rgba_map[4]; /* component index -> RGBA color index map */
199  int min[4], max[4];
200  int val, color, ret;
201 
202  s->hsub = desc->log2_chroma_w;
203  s->vsub = desc->log2_chroma_h;
204 
205  s->var_values[VAR_W] = inlink->w;
206  s->var_values[VAR_H] = inlink->h;
207 
208  switch (inlink->format) {
209  case AV_PIX_FMT_YUV410P:
210  case AV_PIX_FMT_YUV411P:
211  case AV_PIX_FMT_YUV420P:
212  case AV_PIX_FMT_YUV422P:
213  case AV_PIX_FMT_YUV440P:
214  case AV_PIX_FMT_YUV444P:
215  case AV_PIX_FMT_YUVA420P:
216  case AV_PIX_FMT_YUVA422P:
217  case AV_PIX_FMT_YUVA444P:
218  min[Y] = min[U] = min[V] = 16;
219  max[Y] = 235;
220  max[U] = max[V] = 240;
221  min[A] = 0; max[A] = 255;
222  break;
223  default:
224  min[0] = min[1] = min[2] = min[3] = 0;
225  max[0] = max[1] = max[2] = max[3] = 255;
226  }
227 
228  s->is_yuv = s->is_rgb = 0;
229  if (ff_fmt_is_in(inlink->format, yuv_pix_fmts)) s->is_yuv = 1;
230  else if (ff_fmt_is_in(inlink->format, rgb_pix_fmts)) s->is_rgb = 1;
231 
232  if (s->is_rgb) {
233  ff_fill_rgba_map(rgba_map, inlink->format);
234  s->step = av_get_bits_per_pixel(desc) >> 3;
235  }
236 
237  for (color = 0; color < desc->nb_components; color++) {
238  double res;
239  int comp = s->is_rgb ? rgba_map[color] : color;
240 
241  /* create the parsed expression */
242  av_expr_free(s->comp_expr[color]);
243  s->comp_expr[color] = NULL;
244  ret = av_expr_parse(&s->comp_expr[color], s->comp_expr_str[color],
245  var_names, funcs1_names, funcs1, NULL, NULL, 0, ctx);
246  if (ret < 0) {
247  av_log(ctx, AV_LOG_ERROR,
248  "Error when parsing the expression '%s' for the component %d and color %d.\n",
249  s->comp_expr_str[comp], comp, color);
250  return AVERROR(EINVAL);
251  }
252 
253  /* compute the lut */
254  s->var_values[VAR_MAXVAL] = max[color];
255  s->var_values[VAR_MINVAL] = min[color];
256 
257  for (val = 0; val < 256; val++) {
258  s->var_values[VAR_VAL] = val;
259  s->var_values[VAR_CLIPVAL] = av_clip(val, min[color], max[color]);
260  s->var_values[VAR_NEGVAL] =
261  av_clip(min[color] + max[color] - s->var_values[VAR_VAL],
262  min[color], max[color]);
263 
264  res = av_expr_eval(s->comp_expr[color], s->var_values, s);
265  if (isnan(res)) {
266  av_log(ctx, AV_LOG_ERROR,
267  "Error when evaluating the expression '%s' for the value %d for the component %d.\n",
268  s->comp_expr_str[color], val, comp);
269  return AVERROR(EINVAL);
270  }
271  s->lut[comp][val] = av_clip((int)res, min[color], max[color]);
272  av_log(ctx, AV_LOG_DEBUG, "val[%d][%d] = %d\n", comp, val, s->lut[comp][val]);
273  }
274  }
275 
276  return 0;
277 }
278 
279 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
280 {
281  AVFilterContext *ctx = inlink->dst;
282  LutContext *s = ctx->priv;
283  AVFilterLink *outlink = ctx->outputs[0];
284  AVFrame *out;
285  uint8_t *inrow, *outrow, *inrow0, *outrow0;
286  int i, j, plane, direct = 0;
287 
288  if (av_frame_is_writable(in)) {
289  direct = 1;
290  out = in;
291  } else {
292  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
293  if (!out) {
294  av_frame_free(&in);
295  return AVERROR(ENOMEM);
296  }
297  av_frame_copy_props(out, in);
298  }
299 
300  if (s->is_rgb) {
301  /* packed */
302  const int w = inlink->w;
303  const int h = in->height;
304  const uint8_t (*tab)[256] = (const uint8_t (*)[256])s->lut;
305  const int in_linesize = in->linesize[0];
306  const int out_linesize = out->linesize[0];
307  const int step = s->step;
308 
309  inrow0 = in ->data[0];
310  outrow0 = out->data[0];
311 
312  for (i = 0; i < h; i ++) {
313  inrow = inrow0;
314  outrow = outrow0;
315  for (j = 0; j < w; j++) {
316  switch (step) {
317  case 4: outrow[3] = tab[3][inrow[3]]; // Fall-through
318  case 3: outrow[2] = tab[2][inrow[2]]; // Fall-through
319  case 2: outrow[1] = tab[1][inrow[1]]; // Fall-through
320  default: outrow[0] = tab[0][inrow[0]];
321  }
322  outrow += step;
323  inrow += step;
324  }
325  inrow0 += in_linesize;
326  outrow0 += out_linesize;
327  }
328  } else {
329  /* planar */
330  for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++) {
331  int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
332  int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
333  int h = FF_CEIL_RSHIFT(inlink->h, vsub);
334  int w = FF_CEIL_RSHIFT(inlink->w, hsub);
335  const uint8_t *tab = s->lut[plane];
336  const int in_linesize = in->linesize[plane];
337  const int out_linesize = out->linesize[plane];
338 
339  inrow = in ->data[plane];
340  outrow = out->data[plane];
341 
342  for (i = 0; i < h; i++) {
343  for (j = 0; j < w; j++)
344  outrow[j] = tab[inrow[j]];
345  inrow += in_linesize;
346  outrow += out_linesize;
347  }
348  }
349  }
350 
351  if (!direct)
352  av_frame_free(&in);
353 
354  return ff_filter_frame(outlink, out);
355 }
356 
357 static const AVFilterPad inputs[] = {
358  { .name = "default",
359  .type = AVMEDIA_TYPE_VIDEO,
360  .filter_frame = filter_frame,
361  .config_props = config_props,
362  },
363  { NULL }
364 };
365 static const AVFilterPad outputs[] = {
366  { .name = "default",
367  .type = AVMEDIA_TYPE_VIDEO,
368  },
369  { NULL }
370 };
371 
372 #define DEFINE_LUT_FILTER(name_, description_) \
373  AVFilter ff_vf_##name_ = { \
374  .name = #name_, \
375  .description = NULL_IF_CONFIG_SMALL(description_), \
376  .priv_size = sizeof(LutContext), \
377  .priv_class = &name_ ## _class, \
378  .init = name_##_init, \
379  .uninit = uninit, \
380  .query_formats = query_formats, \
381  .inputs = inputs, \
382  .outputs = outputs, \
383  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, \
384  }
385 
386 #if CONFIG_LUT_FILTER
387 
388 #define lut_options options
390 
391 static int lut_init(AVFilterContext *ctx)
392 {
393  return 0;
394 }
395 
396 DEFINE_LUT_FILTER(lut, "Compute and apply a lookup table to the RGB/YUV input video.");
397 #endif
398 
399 #if CONFIG_LUTYUV_FILTER
400 
401 #define lutyuv_options options
402 AVFILTER_DEFINE_CLASS(lutyuv);
403 
404 static av_cold int lutyuv_init(AVFilterContext *ctx)
405 {
406  LutContext *s = ctx->priv;
407 
408  s->is_yuv = 1;
409 
410  return 0;
411 }
412 
413 DEFINE_LUT_FILTER(lutyuv, "Compute and apply a lookup table to the YUV input video.");
414 #endif
415 
416 #if CONFIG_LUTRGB_FILTER
417 
418 #define lutrgb_options options
419 AVFILTER_DEFINE_CLASS(lutrgb);
420 
421 static av_cold int lutrgb_init(AVFilterContext *ctx)
422 {
423  LutContext *s = ctx->priv;
424 
425  s->is_rgb = 1;
426 
427  return 0;
428 }
429 
430 DEFINE_LUT_FILTER(lutrgb, "Compute and apply a lookup table to the RGB input video.");
431 #endif
432 
433 #if CONFIG_NEGATE_FILTER
434 
435 static const AVOption negate_options[] = {
436  { "negate_alpha", NULL, OFFSET(negate_alpha), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
437  { NULL }
438 };
439 
440 AVFILTER_DEFINE_CLASS(negate);
441 
442 static av_cold int negate_init(AVFilterContext *ctx)
443 {
444  LutContext *s = ctx->priv;
445  int i;
446 
447  av_log(ctx, AV_LOG_DEBUG, "negate_alpha:%d\n", s->negate_alpha);
448 
449  for (i = 0; i < 4; i++) {
450  s->comp_expr_str[i] = av_strdup((i == 3 && !s->negate_alpha) ?
451  "val" : "negval");
452  if (!s->comp_expr_str[i]) {
453  uninit(ctx);
454  return AVERROR(ENOMEM);
455  }
456  }
457 
458  return 0;
459 }
460 
461 DEFINE_LUT_FILTER(negate, "Negate input video.");
462 
463 #endif
#define NULL
Definition: coverity.c:32
char * comp_expr_str[4]
Definition: vf_lut.c:63
const char const char void * val
Definition: avisynth_c.h:672
const char * s
Definition: avisynth_c.h:669
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2029
This structure describes decoded (raw) audio or video data.
Definition: frame.h:163
AVOption.
Definition: opt.h:255
#define G
Definition: vf_lut.c:76
#define A
Definition: vf_lut.c:78
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:73
Main libavfilter public API header.
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:1981
uint8_t lut[4][256]
lookup table for each component
Definition: vf_lut.c:62
#define RGB_FORMATS
Definition: vf_lut.c:117
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_lut.c:279
static const AVOption options[]
Definition: vf_lut.c:83
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_dlog(ac->avr,"%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-> in
static const char *const funcs1_names[]
Definition: vf_lut.c:186
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:652
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
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
static enum AVPixelFormat yuv_pix_fmts[]
Definition: vf_lut.c:122
static double compute_gammaval709(void *opaque, double gamma)
Compute ITU Rec.709 gamma correction of value val.
Definition: vf_lut.c:167
Macro definitions for various function/variable attributes.
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:294
const char * name
Pad name.
Definition: internal.h:67
static const char *const var_names[]
Definition: vf_lut.c:38
#define R
Definition: vf_lut.c:75
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1145
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:108
uint8_t
#define av_cold
Definition: attributes.h:74
AVOptions.
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:86
static av_always_inline av_const int isnan(float x)
Definition: libm.h:96
static double(*const funcs1[])(void *, double)
Definition: vf_lut.c:179
Definition: eval.c:143
void 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:539
int ff_fmt_is_in(int fmt, const int *fmts)
Tell is a format is contained in the provided list terminated by -1.
Definition: formats.c:254
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:61
#define YUV_FORMATS
Definition: vf_lut.c:110
static enum AVPixelFormat all_pix_fmts[]
Definition: vf_lut.c:124
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:267
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:175
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
void * priv
private data for use by the filter
Definition: avfilter.h:654
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:196
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:72
var_name
Definition: aeval.c:46
double var_values[VAR_VARS_NB]
Definition: vf_lut.c:66
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
int hsub
Definition: vf_lut.c:65
#define OFFSET(x)
Definition: vf_lut.c:80
ret
Definition: avfilter.c:974
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
#define U
Definition: vf_lut.c:73
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:33
Definition: vf_lut.c:52
misc drawing utilities
int is_rgb
Definition: vf_lut.c:67
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:312
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:403
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:265
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:191
static const AVFilterPad outputs[]
Definition: vf_lut.c:365
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:266
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
static int query_formats(AVFilterContext *ctx)
Definition: vf_lut.c:126
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:74
Describe the class of an AVClass context structure.
Definition: log.h:66
Definition: vf_lut.c:50
int step
Definition: vf_lut.c:68
AVExpr * comp_expr[4]
Definition: vf_lut.c:64
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
#define DEFINE_LUT_FILTER(name_, description_)
Definition: vf_lut.c:372
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:174
uint8_t level
Definition: svq3.c:150
static enum AVPixelFormat rgb_pix_fmts[]
Definition: vf_lut.c:123
static const AVFilterPad inputs[]
Definition: vf_lut.c:357
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_dlog(ac->avr,"%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
static int config_props(AVFilterLink *inlink)
Definition: vf_lut.c:193
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:68
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_lut.c:98
#define V
Definition: vf_lut.c:74
common internal and external API header
static double clip(void *opaque, double val)
Clip value val in the minval - maxval range.
Definition: vf_lut.c:141
#define Y
Definition: vf_lut.c:72
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:75
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:703
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:313
#define FLAGS
Definition: vf_lut.c:81
int negate_alpha
Definition: vf_lut.c:69
int vsub
Definition: vf_lut.c:65
static const struct twinvq_data tab
An instance of a filter.
Definition: avfilter.h:633
static double compute_gammaval(void *opaque, double gamma)
Compute gamma correction for value val, assuming the minval-maxval range, val is clipped to a value c...
Definition: vf_lut.c:154
int height
Definition: frame.h:212
#define av_freep(p)
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
Definition: eamad.c:83
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:106
internal API functions
#define B
Definition: vf_lut.c:77
float min
AVPixelFormat
Pixel format.
Definition: pixfmt.h:66
int is_yuv
Definition: vf_lut.c:67
Definition: vf_lut.c:51
for(j=16;j >0;--j)
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:463
simple arithmetic expression evaluator