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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  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
134  if (!fmts_list)
135  return AVERROR(ENOMEM);
136  return ff_set_common_formats(ctx, fmts_list);
137 }
138 
139 /**
140  * Clip value val in the minval - maxval range.
141  */
142 static double clip(void *opaque, double val)
143 {
144  LutContext *s = opaque;
145  double minval = s->var_values[VAR_MINVAL];
146  double maxval = s->var_values[VAR_MAXVAL];
147 
148  return av_clip(val, minval, maxval);
149 }
150 
151 /**
152  * Compute gamma correction for value val, assuming the minval-maxval
153  * range, val is clipped to a value contained in the same interval.
154  */
155 static double compute_gammaval(void *opaque, double gamma)
156 {
157  LutContext *s = opaque;
158  double val = s->var_values[VAR_CLIPVAL];
159  double minval = s->var_values[VAR_MINVAL];
160  double maxval = s->var_values[VAR_MAXVAL];
161 
162  return pow((val-minval)/(maxval-minval), gamma) * (maxval-minval)+minval;
163 }
164 
165 /**
166  * Compute ITU Rec.709 gamma correction of value val.
167  */
168 static double compute_gammaval709(void *opaque, double gamma)
169 {
170  LutContext *s = opaque;
171  double val = s->var_values[VAR_CLIPVAL];
172  double minval = s->var_values[VAR_MINVAL];
173  double maxval = s->var_values[VAR_MAXVAL];
174  double level = (val - minval) / (maxval - minval);
175  level = level < 0.018 ? 4.5 * level
176  : 1.099 * pow(level, 1.0 / gamma) - 0.099;
177  return level * (maxval - minval) + minval;
178 }
179 
180 static double (* const funcs1[])(void *, double) = {
181  (void *)clip,
182  (void *)compute_gammaval,
183  (void *)compute_gammaval709,
184  NULL
185 };
186 
187 static const char * const funcs1_names[] = {
188  "clip",
189  "gammaval",
190  "gammaval709",
191  NULL
192 };
193 
194 static int config_props(AVFilterLink *inlink)
195 {
196  AVFilterContext *ctx = inlink->dst;
197  LutContext *s = ctx->priv;
198  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
199  uint8_t rgba_map[4]; /* component index -> RGBA color index map */
200  int min[4], max[4];
201  int val, color, ret;
202 
203  s->hsub = desc->log2_chroma_w;
204  s->vsub = desc->log2_chroma_h;
205 
206  s->var_values[VAR_W] = inlink->w;
207  s->var_values[VAR_H] = inlink->h;
208 
209  switch (inlink->format) {
210  case AV_PIX_FMT_YUV410P:
211  case AV_PIX_FMT_YUV411P:
212  case AV_PIX_FMT_YUV420P:
213  case AV_PIX_FMT_YUV422P:
214  case AV_PIX_FMT_YUV440P:
215  case AV_PIX_FMT_YUV444P:
216  case AV_PIX_FMT_YUVA420P:
217  case AV_PIX_FMT_YUVA422P:
218  case AV_PIX_FMT_YUVA444P:
219  min[Y] = min[U] = min[V] = 16;
220  max[Y] = 235;
221  max[U] = max[V] = 240;
222  min[A] = 0; max[A] = 255;
223  break;
224  default:
225  min[0] = min[1] = min[2] = min[3] = 0;
226  max[0] = max[1] = max[2] = max[3] = 255;
227  }
228 
229  s->is_yuv = s->is_rgb = 0;
230  if (ff_fmt_is_in(inlink->format, yuv_pix_fmts)) s->is_yuv = 1;
231  else if (ff_fmt_is_in(inlink->format, rgb_pix_fmts)) s->is_rgb = 1;
232 
233  if (s->is_rgb) {
234  ff_fill_rgba_map(rgba_map, inlink->format);
235  s->step = av_get_bits_per_pixel(desc) >> 3;
236  }
237 
238  for (color = 0; color < desc->nb_components; color++) {
239  double res;
240  int comp = s->is_rgb ? rgba_map[color] : color;
241 
242  /* create the parsed expression */
243  av_expr_free(s->comp_expr[color]);
244  s->comp_expr[color] = NULL;
245  ret = av_expr_parse(&s->comp_expr[color], s->comp_expr_str[color],
246  var_names, funcs1_names, funcs1, NULL, NULL, 0, ctx);
247  if (ret < 0) {
248  av_log(ctx, AV_LOG_ERROR,
249  "Error when parsing the expression '%s' for the component %d and color %d.\n",
250  s->comp_expr_str[comp], comp, color);
251  return AVERROR(EINVAL);
252  }
253 
254  /* compute the lut */
255  s->var_values[VAR_MAXVAL] = max[color];
256  s->var_values[VAR_MINVAL] = min[color];
257 
258  for (val = 0; val < 256; val++) {
259  s->var_values[VAR_VAL] = val;
260  s->var_values[VAR_CLIPVAL] = av_clip(val, min[color], max[color]);
261  s->var_values[VAR_NEGVAL] =
262  av_clip(min[color] + max[color] - s->var_values[VAR_VAL],
263  min[color], max[color]);
264 
265  res = av_expr_eval(s->comp_expr[color], s->var_values, s);
266  if (isnan(res)) {
267  av_log(ctx, AV_LOG_ERROR,
268  "Error when evaluating the expression '%s' for the value %d for the component %d.\n",
269  s->comp_expr_str[color], val, comp);
270  return AVERROR(EINVAL);
271  }
272  s->lut[comp][val] = av_clip((int)res, min[color], max[color]);
273  av_log(ctx, AV_LOG_DEBUG, "val[%d][%d] = %d\n", comp, val, s->lut[comp][val]);
274  }
275  }
276 
277  return 0;
278 }
279 
280 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
281 {
282  AVFilterContext *ctx = inlink->dst;
283  LutContext *s = ctx->priv;
284  AVFilterLink *outlink = ctx->outputs[0];
285  AVFrame *out;
286  uint8_t *inrow, *outrow, *inrow0, *outrow0;
287  int i, j, plane, direct = 0;
288 
289  if (av_frame_is_writable(in)) {
290  direct = 1;
291  out = in;
292  } else {
293  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
294  if (!out) {
295  av_frame_free(&in);
296  return AVERROR(ENOMEM);
297  }
298  av_frame_copy_props(out, in);
299  }
300 
301  if (s->is_rgb) {
302  /* packed */
303  const int w = inlink->w;
304  const int h = in->height;
305  const uint8_t (*tab)[256] = (const uint8_t (*)[256])s->lut;
306  const int in_linesize = in->linesize[0];
307  const int out_linesize = out->linesize[0];
308  const int step = s->step;
309 
310  inrow0 = in ->data[0];
311  outrow0 = out->data[0];
312 
313  for (i = 0; i < h; i ++) {
314  inrow = inrow0;
315  outrow = outrow0;
316  for (j = 0; j < w; j++) {
317  switch (step) {
318  case 4: outrow[3] = tab[3][inrow[3]]; // Fall-through
319  case 3: outrow[2] = tab[2][inrow[2]]; // Fall-through
320  case 2: outrow[1] = tab[1][inrow[1]]; // Fall-through
321  default: outrow[0] = tab[0][inrow[0]];
322  }
323  outrow += step;
324  inrow += step;
325  }
326  inrow0 += in_linesize;
327  outrow0 += out_linesize;
328  }
329  } else {
330  /* planar */
331  for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++) {
332  int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
333  int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
334  int h = FF_CEIL_RSHIFT(inlink->h, vsub);
335  int w = FF_CEIL_RSHIFT(inlink->w, hsub);
336  const uint8_t *tab = s->lut[plane];
337  const int in_linesize = in->linesize[plane];
338  const int out_linesize = out->linesize[plane];
339 
340  inrow = in ->data[plane];
341  outrow = out->data[plane];
342 
343  for (i = 0; i < h; i++) {
344  for (j = 0; j < w; j++)
345  outrow[j] = tab[inrow[j]];
346  inrow += in_linesize;
347  outrow += out_linesize;
348  }
349  }
350  }
351 
352  if (!direct)
353  av_frame_free(&in);
354 
355  return ff_filter_frame(outlink, out);
356 }
357 
358 static const AVFilterPad inputs[] = {
359  { .name = "default",
360  .type = AVMEDIA_TYPE_VIDEO,
361  .filter_frame = filter_frame,
362  .config_props = config_props,
363  },
364  { NULL }
365 };
366 static const AVFilterPad outputs[] = {
367  { .name = "default",
368  .type = AVMEDIA_TYPE_VIDEO,
369  },
370  { NULL }
371 };
372 
373 #define DEFINE_LUT_FILTER(name_, description_) \
374  AVFilter ff_vf_##name_ = { \
375  .name = #name_, \
376  .description = NULL_IF_CONFIG_SMALL(description_), \
377  .priv_size = sizeof(LutContext), \
378  .priv_class = &name_ ## _class, \
379  .init = name_##_init, \
380  .uninit = uninit, \
381  .query_formats = query_formats, \
382  .inputs = inputs, \
383  .outputs = outputs, \
384  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, \
385  }
386 
387 #if CONFIG_LUT_FILTER
388 
389 #define lut_options options
391 
392 static int lut_init(AVFilterContext *ctx)
393 {
394  return 0;
395 }
396 
397 DEFINE_LUT_FILTER(lut, "Compute and apply a lookup table to the RGB/YUV input video.");
398 #endif
399 
400 #if CONFIG_LUTYUV_FILTER
401 
402 #define lutyuv_options options
403 AVFILTER_DEFINE_CLASS(lutyuv);
404 
405 static av_cold int lutyuv_init(AVFilterContext *ctx)
406 {
407  LutContext *s = ctx->priv;
408 
409  s->is_yuv = 1;
410 
411  return 0;
412 }
413 
414 DEFINE_LUT_FILTER(lutyuv, "Compute and apply a lookup table to the YUV input video.");
415 #endif
416 
417 #if CONFIG_LUTRGB_FILTER
418 
419 #define lutrgb_options options
420 AVFILTER_DEFINE_CLASS(lutrgb);
421 
422 static av_cold int lutrgb_init(AVFilterContext *ctx)
423 {
424  LutContext *s = ctx->priv;
425 
426  s->is_rgb = 1;
427 
428  return 0;
429 }
430 
431 DEFINE_LUT_FILTER(lutrgb, "Compute and apply a lookup table to the RGB input video.");
432 #endif
433 
434 #if CONFIG_NEGATE_FILTER
435 
436 static const AVOption negate_options[] = {
437  { "negate_alpha", NULL, OFFSET(negate_alpha), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
438  { NULL }
439 };
440 
441 AVFILTER_DEFINE_CLASS(negate);
442 
443 static av_cold int negate_init(AVFilterContext *ctx)
444 {
445  LutContext *s = ctx->priv;
446  int i;
447 
448  av_log(ctx, AV_LOG_DEBUG, "negate_alpha:%d\n", s->negate_alpha);
449 
450  for (i = 0; i < 4; i++) {
451  s->comp_expr_str[i] = av_strdup((i == 3 && !s->negate_alpha) ?
452  "val" : "negval");
453  if (!s->comp_expr_str[i]) {
454  uninit(ctx);
455  return AVERROR(ENOMEM);
456  }
457  }
458 
459  return 0;
460 }
461 
462 DEFINE_LUT_FILTER(negate, "Negate input video.");
463 
464 #endif
int plane
Definition: avisynth_c.h:291
#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:634
const char * s
Definition: avisynth_c.h:631
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2090
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
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:68
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:2042
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:280
static const AVOption options[]
Definition: vf_lut.c:83
static const char *const funcs1_names[]
Definition: vf_lut.c:187
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:168
Macro definitions for various function/variable attributes.
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
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:103
uint8_t
#define av_cold
Definition: attributes.h:74
AVOptions.
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
static av_always_inline av_const int isnan(float x)
Definition: libm.h:96
static double(*const funcs1[])(void *, double)
Definition: vf_lut.c:180
Definition: eval.c:143
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:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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
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:197
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
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:488
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:199
static const AVFilterPad outputs[]
Definition: vf_lut.c:366
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:268
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
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-> in
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:69
Describe the class of an AVClass context structure.
Definition: log.h:67
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:373
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
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:358
static int config_props(AVFilterLink *inlink)
Definition: vf_lut.c:194
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
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:142
#define Y
Definition: vf_lut.c:72
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:70
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:707
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:313
#define FLAGS
Definition: vf_lut.c:81
A list of supported formats for one end of a filter link.
Definition: formats.h:64
int negate_alpha
Definition: vf_lut.c:69
int vsub
Definition: vf_lut.c:65
static const struct twinvq_data tab
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
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:155
int height
Definition: frame.h:220
#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:101
internal API functions
#define B
Definition: vf_lut.c:77
float min
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
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:548
simple arithmetic expression evaluator