2 * Copyright (c) 2013 Clément Bœsch
4 * This file is part of FFmpeg.
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.
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.
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
23 * 3D Lookup table filter
26 #include "libavutil/opt.h"
27 #include "libavutil/file.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/avstring.h"
33 #include "drawutils.h"
34 #include "dualinput.h"
46 INTERPOLATE_TRILINEAR,
47 INTERPOLATE_TETRAHEDRAL,
55 /* 3D LUT don't often go up to level 32, but it is common to have a Hald CLUT
56 * of 512x512 (64x64x64) */
59 typedef struct LUT3DContext {
61 enum interp_mode interpolation;
66 struct rgbvec (*interp_8) (const struct LUT3DContext*, uint8_t, uint8_t, uint8_t);
67 struct rgbvec (*interp_16)(const struct LUT3DContext*, uint16_t, uint16_t, uint16_t);
68 struct rgbvec lut[MAX_LEVEL][MAX_LEVEL][MAX_LEVEL];
70 #if CONFIG_HALDCLUT_FILTER
71 uint8_t clut_rgba_map[4];
75 FFDualInputContext dinput;
79 #define OFFSET(x) offsetof(LUT3DContext, x)
80 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
81 #define COMMON_OPTIONS \
82 { "interp", "select interpolation mode", OFFSET(interpolation), AV_OPT_TYPE_INT, {.i64=INTERPOLATE_TETRAHEDRAL}, 0, NB_INTERP_MODE-1, FLAGS, "interp_mode" }, \
83 { "nearest", "use values from the nearest defined points", 0, AV_OPT_TYPE_CONST, {.i64=INTERPOLATE_NEAREST}, INT_MIN, INT_MAX, FLAGS, "interp_mode" }, \
84 { "trilinear", "interpolate values using the 8 points defining a cube", 0, AV_OPT_TYPE_CONST, {.i64=INTERPOLATE_TRILINEAR}, INT_MIN, INT_MAX, FLAGS, "interp_mode" }, \
85 { "tetrahedral", "interpolate values using a tetrahedron", 0, AV_OPT_TYPE_CONST, {.i64=INTERPOLATE_TETRAHEDRAL}, INT_MIN, INT_MAX, FLAGS, "interp_mode" }, \
88 static inline float lerpf(float v0, float v1, float f)
90 return v0 + (v1 - v0) * f;
93 static inline struct rgbvec lerp(const struct rgbvec *v0, const struct rgbvec *v1, float f)
96 lerpf(v0->r, v1->r, f), lerpf(v0->g, v1->g, f), lerpf(v0->b, v1->b, f)
101 #define NEAR(x) ((int)((x) + .5))
102 #define PREV(x) ((int)(x))
103 #define NEXT(x) (FFMIN((int)(x) + 1, lut3d->lutsize - 1))
106 * Get the nearest defined point
108 static inline struct rgbvec interp_nearest(const LUT3DContext *lut3d,
109 const struct rgbvec *s)
111 return lut3d->lut[NEAR(s->r)][NEAR(s->g)][NEAR(s->b)];
115 * Interpolate using the 8 vertices of a cube
116 * @see https://en.wikipedia.org/wiki/Trilinear_interpolation
118 static inline struct rgbvec interp_trilinear(const LUT3DContext *lut3d,
119 const struct rgbvec *s)
121 const int prev[] = {PREV(s->r), PREV(s->g), PREV(s->b)};
122 const int next[] = {NEXT(s->r), NEXT(s->g), NEXT(s->b)};
123 const struct rgbvec d = {s->r - prev[0], s->g - prev[1], s->b - prev[2]};
124 const struct rgbvec c000 = lut3d->lut[prev[0]][prev[1]][prev[2]];
125 const struct rgbvec c001 = lut3d->lut[prev[0]][prev[1]][next[2]];
126 const struct rgbvec c010 = lut3d->lut[prev[0]][next[1]][prev[2]];
127 const struct rgbvec c011 = lut3d->lut[prev[0]][next[1]][next[2]];
128 const struct rgbvec c100 = lut3d->lut[next[0]][prev[1]][prev[2]];
129 const struct rgbvec c101 = lut3d->lut[next[0]][prev[1]][next[2]];
130 const struct rgbvec c110 = lut3d->lut[next[0]][next[1]][prev[2]];
131 const struct rgbvec c111 = lut3d->lut[next[0]][next[1]][next[2]];
132 const struct rgbvec c00 = lerp(&c000, &c100, d.r);
133 const struct rgbvec c10 = lerp(&c010, &c110, d.r);
134 const struct rgbvec c01 = lerp(&c001, &c101, d.r);
135 const struct rgbvec c11 = lerp(&c011, &c111, d.r);
136 const struct rgbvec c0 = lerp(&c00, &c10, d.g);
137 const struct rgbvec c1 = lerp(&c01, &c11, d.g);
138 const struct rgbvec c = lerp(&c0, &c1, d.b);
143 * Tetrahedral interpolation. Based on code found in Truelight Software Library paper.
144 * @see http://www.filmlight.ltd.uk/pdf/whitepapers/FL-TL-TN-0057-SoftwareLib.pdf
146 static inline struct rgbvec interp_tetrahedral(const LUT3DContext *lut3d,
147 const struct rgbvec *s)
149 const int prev[] = {PREV(s->r), PREV(s->g), PREV(s->b)};
150 const int next[] = {NEXT(s->r), NEXT(s->g), NEXT(s->b)};
151 const struct rgbvec d = {s->r - prev[0], s->g - prev[1], s->b - prev[2]};
152 const struct rgbvec c000 = lut3d->lut[prev[0]][prev[1]][prev[2]];
153 const struct rgbvec c111 = lut3d->lut[next[0]][next[1]][next[2]];
157 const struct rgbvec c100 = lut3d->lut[next[0]][prev[1]][prev[2]];
158 const struct rgbvec c110 = lut3d->lut[next[0]][next[1]][prev[2]];
159 c.r = (1-d.r) * c000.r + (d.r-d.g) * c100.r + (d.g-d.b) * c110.r + (d.b) * c111.r;
160 c.g = (1-d.r) * c000.g + (d.r-d.g) * c100.g + (d.g-d.b) * c110.g + (d.b) * c111.g;
161 c.b = (1-d.r) * c000.b + (d.r-d.g) * c100.b + (d.g-d.b) * c110.b + (d.b) * c111.b;
162 } else if (d.r > d.b) {
163 const struct rgbvec c100 = lut3d->lut[next[0]][prev[1]][prev[2]];
164 const struct rgbvec c101 = lut3d->lut[next[0]][prev[1]][next[2]];
165 c.r = (1-d.r) * c000.r + (d.r-d.b) * c100.r + (d.b-d.g) * c101.r + (d.g) * c111.r;
166 c.g = (1-d.r) * c000.g + (d.r-d.b) * c100.g + (d.b-d.g) * c101.g + (d.g) * c111.g;
167 c.b = (1-d.r) * c000.b + (d.r-d.b) * c100.b + (d.b-d.g) * c101.b + (d.g) * c111.b;
169 const struct rgbvec c001 = lut3d->lut[prev[0]][prev[1]][next[2]];
170 const struct rgbvec c101 = lut3d->lut[next[0]][prev[1]][next[2]];
171 c.r = (1-d.b) * c000.r + (d.b-d.r) * c001.r + (d.r-d.g) * c101.r + (d.g) * c111.r;
172 c.g = (1-d.b) * c000.g + (d.b-d.r) * c001.g + (d.r-d.g) * c101.g + (d.g) * c111.g;
173 c.b = (1-d.b) * c000.b + (d.b-d.r) * c001.b + (d.r-d.g) * c101.b + (d.g) * c111.b;
177 const struct rgbvec c001 = lut3d->lut[prev[0]][prev[1]][next[2]];
178 const struct rgbvec c011 = lut3d->lut[prev[0]][next[1]][next[2]];
179 c.r = (1-d.b) * c000.r + (d.b-d.g) * c001.r + (d.g-d.r) * c011.r + (d.r) * c111.r;
180 c.g = (1-d.b) * c000.g + (d.b-d.g) * c001.g + (d.g-d.r) * c011.g + (d.r) * c111.g;
181 c.b = (1-d.b) * c000.b + (d.b-d.g) * c001.b + (d.g-d.r) * c011.b + (d.r) * c111.b;
182 } else if (d.b > d.r) {
183 const struct rgbvec c010 = lut3d->lut[prev[0]][next[1]][prev[2]];
184 const struct rgbvec c011 = lut3d->lut[prev[0]][next[1]][next[2]];
185 c.r = (1-d.g) * c000.r + (d.g-d.b) * c010.r + (d.b-d.r) * c011.r + (d.r) * c111.r;
186 c.g = (1-d.g) * c000.g + (d.g-d.b) * c010.g + (d.b-d.r) * c011.g + (d.r) * c111.g;
187 c.b = (1-d.g) * c000.b + (d.g-d.b) * c010.b + (d.b-d.r) * c011.b + (d.r) * c111.b;
189 const struct rgbvec c010 = lut3d->lut[prev[0]][next[1]][prev[2]];
190 const struct rgbvec c110 = lut3d->lut[next[0]][next[1]][prev[2]];
191 c.r = (1-d.g) * c000.r + (d.g-d.r) * c010.r + (d.r-d.b) * c110.r + (d.b) * c111.r;
192 c.g = (1-d.g) * c000.g + (d.g-d.r) * c010.g + (d.r-d.b) * c110.g + (d.b) * c111.g;
193 c.b = (1-d.g) * c000.b + (d.g-d.r) * c010.b + (d.r-d.b) * c110.b + (d.b) * c111.b;
199 #define DEFINE_INTERP_FUNC(name, nbits) \
200 static struct rgbvec interp_##nbits##_##name(const LUT3DContext *lut3d, \
205 const float scale = (1. / ((1<<nbits) - 1)) * (lut3d->lutsize - 1); \
206 const struct rgbvec scaled_rgb = {r * scale, g * scale, b * scale}; \
207 return interp_##name(lut3d, &scaled_rgb); \
210 DEFINE_INTERP_FUNC(nearest, 8)
211 DEFINE_INTERP_FUNC(trilinear, 8)
212 DEFINE_INTERP_FUNC(tetrahedral, 8)
214 DEFINE_INTERP_FUNC(nearest, 16)
215 DEFINE_INTERP_FUNC(trilinear, 16)
216 DEFINE_INTERP_FUNC(tetrahedral, 16)
218 #define MAX_LINE_SIZE 512
220 static int skip_line(const char *p)
222 while (*p && av_isspace(*p))
224 return !*p || *p == '#';
227 #define NEXT_LINE(loop_cond) do { \
228 if (!fgets(line, sizeof(line), f)) { \
229 av_log(ctx, AV_LOG_ERROR, "Unexpected EOF\n"); \
230 return AVERROR_INVALIDDATA; \
234 /* Basically r g and b float values on each line; seems to be generated by
236 static int parse_dat(AVFilterContext *ctx, FILE *f)
238 LUT3DContext *lut3d = ctx->priv;
239 const int size = lut3d->lutsize;
242 for (k = 0; k < size; k++) {
243 for (j = 0; j < size; j++) {
244 for (i = 0; i < size; i++) {
245 char line[MAX_LINE_SIZE];
246 struct rgbvec *vec = &lut3d->lut[k][j][i];
247 NEXT_LINE(skip_line(line));
248 sscanf(line, "%f %f %f", &vec->r, &vec->g, &vec->b);
256 static int parse_cube(AVFilterContext *ctx, FILE *f)
258 LUT3DContext *lut3d = ctx->priv;
259 char line[MAX_LINE_SIZE];
260 float min[3] = {0.0, 0.0, 0.0};
261 float max[3] = {1.0, 1.0, 1.0};
263 while (fgets(line, sizeof(line), f)) {
264 if (!strncmp(line, "LUT_3D_SIZE ", 12)) {
266 const int size = strtol(line + 12, NULL, 0);
268 if (size < 2 || size > MAX_LEVEL) {
269 av_log(ctx, AV_LOG_ERROR, "Too large or invalid 3D LUT size\n");
270 return AVERROR(EINVAL);
272 lut3d->lutsize = size;
273 for (k = 0; k < size; k++) {
274 for (j = 0; j < size; j++) {
275 for (i = 0; i < size; i++) {
276 struct rgbvec *vec = &lut3d->lut[k][j][i];
280 if (!strncmp(line, "DOMAIN_", 7)) {
282 if (!strncmp(line + 7, "MIN ", 4)) vals = min;
283 else if (!strncmp(line + 7, "MAX ", 4)) vals = max;
285 return AVERROR_INVALIDDATA;
286 sscanf(line + 11, "%f %f %f", vals, vals + 1, vals + 2);
287 av_log(ctx, AV_LOG_DEBUG, "min: %f %f %f | max: %f %f %f\n",
288 min[0], min[1], min[2], max[0], max[1], max[2]);
291 } while (skip_line(line));
292 if (sscanf(line, "%f %f %f", &vec->r, &vec->g, &vec->b) != 3)
293 return AVERROR_INVALIDDATA;
294 vec->r *= max[0] - min[0];
295 vec->g *= max[1] - min[1];
296 vec->b *= max[2] - min[2];
306 /* Assume 17x17x17 LUT with a 16-bit depth
307 * FIXME: it seems there are various 3dl formats */
308 static int parse_3dl(AVFilterContext *ctx, FILE *f)
310 char line[MAX_LINE_SIZE];
311 LUT3DContext *lut3d = ctx->priv;
314 const float scale = 16*16*16;
316 lut3d->lutsize = size;
317 if (!fgets(line, sizeof(line), f))
318 return AVERROR_INVALIDDATA;
319 for (k = 0; k < size; k++) {
320 for (j = 0; j < size; j++) {
321 for (i = 0; i < size; i++) {
323 struct rgbvec *vec = &lut3d->lut[k][j][i];
325 NEXT_LINE(skip_line(line));
326 if (sscanf(line, "%d %d %d", &r, &g, &b) != 3)
327 return AVERROR_INVALIDDATA;
338 static int parse_m3d(AVFilterContext *ctx, FILE *f)
340 LUT3DContext *lut3d = ctx->priv;
342 int i, j, k, size, in = -1, out = -1;
343 char line[MAX_LINE_SIZE];
344 uint8_t rgb_map[3] = {0, 1, 2};
346 while (fgets(line, sizeof(line), f)) {
347 if (!strncmp(line, "in", 2)) in = strtol(line + 2, NULL, 0);
348 else if (!strncmp(line, "out", 3)) out = strtol(line + 3, NULL, 0);
349 else if (!strncmp(line, "values", 6)) {
350 const char *p = line + 6;
351 #define SET_COLOR(id) do { \
352 while (av_isspace(*p)) \
355 case 'r': rgb_map[id] = 0; break; \
356 case 'g': rgb_map[id] = 1; break; \
357 case 'b': rgb_map[id] = 2; break; \
359 while (*p && !av_isspace(*p)) \
369 if (in == -1 || out == -1) {
370 av_log(ctx, AV_LOG_ERROR, "in and out must be defined\n");
371 return AVERROR_INVALIDDATA;
373 if (in < 2 || out < 2 ||
374 in > MAX_LEVEL*MAX_LEVEL*MAX_LEVEL ||
375 out > MAX_LEVEL*MAX_LEVEL*MAX_LEVEL) {
376 av_log(ctx, AV_LOG_ERROR, "invalid in (%d) or out (%d)\n", in, out);
377 return AVERROR_INVALIDDATA;
379 for (size = 1; size*size*size < in; size++);
380 lut3d->lutsize = size;
381 scale = 1. / (out - 1);
383 for (k = 0; k < size; k++) {
384 for (j = 0; j < size; j++) {
385 for (i = 0; i < size; i++) {
386 struct rgbvec *vec = &lut3d->lut[k][j][i];
390 if (sscanf(line, "%f %f %f", val, val + 1, val + 2) != 3)
391 return AVERROR_INVALIDDATA;
392 vec->r = val[rgb_map[0]] * scale;
393 vec->g = val[rgb_map[1]] * scale;
394 vec->b = val[rgb_map[2]] * scale;
401 static void set_identity_matrix(LUT3DContext *lut3d, int size)
404 const float c = 1. / (size - 1);
406 lut3d->lutsize = size;
407 for (k = 0; k < size; k++) {
408 for (j = 0; j < size; j++) {
409 for (i = 0; i < size; i++) {
410 struct rgbvec *vec = &lut3d->lut[k][j][i];
419 static int query_formats(AVFilterContext *ctx)
421 static const enum AVPixelFormat pix_fmts[] = {
422 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
423 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
424 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
425 AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
426 AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
427 AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
428 AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
431 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
435 static int config_input(AVFilterLink *inlink)
437 LUT3DContext *lut3d = inlink->dst->priv;
438 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
440 switch (inlink->format) {
441 case AV_PIX_FMT_RGB48:
442 case AV_PIX_FMT_BGR48:
443 case AV_PIX_FMT_RGBA64:
444 case AV_PIX_FMT_BGRA64:
448 ff_fill_rgba_map(lut3d->rgba_map, inlink->format);
449 lut3d->step = av_get_padded_bits_per_pixel(desc) >> (3 + lut3d->is16bit);
451 #define SET_FUNC(name) do { \
452 if (lut3d->is16bit) lut3d->interp_16 = interp_16_##name; \
453 else lut3d->interp_8 = interp_8_##name; \
456 switch (lut3d->interpolation) {
457 case INTERPOLATE_NEAREST: SET_FUNC(nearest); break;
458 case INTERPOLATE_TRILINEAR: SET_FUNC(trilinear); break;
459 case INTERPOLATE_TETRAHEDRAL: SET_FUNC(tetrahedral); break;
467 #define FILTER(nbits) do { \
468 uint8_t *dstrow = out->data[0]; \
469 const uint8_t *srcrow = in ->data[0]; \
471 for (y = 0; y < inlink->h; y++) { \
472 uint##nbits##_t *dst = (uint##nbits##_t *)dstrow; \
473 const uint##nbits##_t *src = (const uint##nbits##_t *)srcrow; \
474 for (x = 0; x < inlink->w * step; x += step) { \
475 struct rgbvec vec = lut3d->interp_##nbits(lut3d, src[x + r], src[x + g], src[x + b]); \
476 dst[x + r] = av_clip_uint##nbits(vec.r * (float)((1<<nbits) - 1)); \
477 dst[x + g] = av_clip_uint##nbits(vec.g * (float)((1<<nbits) - 1)); \
478 dst[x + b] = av_clip_uint##nbits(vec.b * (float)((1<<nbits) - 1)); \
479 if (!direct && step == 4) \
480 dst[x + a] = src[x + a]; \
482 dstrow += out->linesize[0]; \
483 srcrow += in ->linesize[0]; \
487 static AVFrame *apply_lut(AVFilterLink *inlink, AVFrame *in)
489 int x, y, direct = 0;
490 AVFilterContext *ctx = inlink->dst;
491 LUT3DContext *lut3d = ctx->priv;
492 AVFilterLink *outlink = inlink->dst->outputs[0];
494 const int step = lut3d->step;
495 const uint8_t r = lut3d->rgba_map[R];
496 const uint8_t g = lut3d->rgba_map[G];
497 const uint8_t b = lut3d->rgba_map[B];
498 const uint8_t a = lut3d->rgba_map[A];
500 if (av_frame_is_writable(in)) {
504 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
509 av_frame_copy_props(out, in);
512 if (lut3d->is16bit) FILTER(16);
521 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
523 AVFilterLink *outlink = inlink->dst->outputs[0];
524 AVFrame *out = apply_lut(inlink, in);
526 return AVERROR(ENOMEM);
527 return ff_filter_frame(outlink, out);
530 #if CONFIG_LUT3D_FILTER
531 static const AVOption lut3d_options[] = {
532 { "file", "set 3D LUT file name", OFFSET(file), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
536 AVFILTER_DEFINE_CLASS(lut3d);
538 static av_cold int lut3d_init(AVFilterContext *ctx)
543 LUT3DContext *lut3d = ctx->priv;
546 set_identity_matrix(lut3d, 32);
550 f = fopen(lut3d->file, "r");
552 ret = AVERROR(errno);
553 av_log(ctx, AV_LOG_ERROR, "%s: %s\n", lut3d->file, av_err2str(ret));
557 ext = strrchr(lut3d->file, '.');
559 av_log(ctx, AV_LOG_ERROR, "Unable to guess the format from the extension\n");
560 ret = AVERROR_INVALIDDATA;
565 if (!av_strcasecmp(ext, "dat")) {
567 ret = parse_dat(ctx, f);
568 } else if (!av_strcasecmp(ext, "3dl")) {
569 ret = parse_3dl(ctx, f);
570 } else if (!av_strcasecmp(ext, "cube")) {
571 ret = parse_cube(ctx, f);
572 } else if (!av_strcasecmp(ext, "m3d")) {
573 ret = parse_m3d(ctx, f);
575 av_log(ctx, AV_LOG_ERROR, "Unrecognized '.%s' file type\n", ext);
576 ret = AVERROR(EINVAL);
579 if (!ret && !lut3d->lutsize) {
580 av_log(ctx, AV_LOG_ERROR, "3D LUT is empty\n");
581 ret = AVERROR_INVALIDDATA;
589 static const AVFilterPad lut3d_inputs[] = {
592 .type = AVMEDIA_TYPE_VIDEO,
593 .filter_frame = filter_frame,
594 .config_props = config_input,
599 static const AVFilterPad lut3d_outputs[] = {
602 .type = AVMEDIA_TYPE_VIDEO,
607 AVFilter avfilter_vf_lut3d = {
609 .description = NULL_IF_CONFIG_SMALL("Adjust colors using a 3D LUT."),
610 .priv_size = sizeof(LUT3DContext),
612 .query_formats = query_formats,
613 .inputs = lut3d_inputs,
614 .outputs = lut3d_outputs,
615 .priv_class = &lut3d_class,
616 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
620 #if CONFIG_HALDCLUT_FILTER
622 static void update_clut(LUT3DContext *lut3d, const AVFrame *frame)
624 const uint8_t *data = frame->data[0];
625 const int linesize = frame->linesize[0];
626 const int w = lut3d->clut_width;
627 const int step = lut3d->clut_step;
628 const uint8_t *rgba_map = lut3d->clut_rgba_map;
629 const int level = lut3d->lutsize;
631 #define LOAD_CLUT(nbits) do { \
632 int i, j, k, x = 0, y = 0; \
634 for (k = 0; k < level; k++) { \
635 for (j = 0; j < level; j++) { \
636 for (i = 0; i < level; i++) { \
637 const uint##nbits##_t *src = (const uint##nbits##_t *) \
638 (data + y*linesize + x*step); \
639 struct rgbvec *vec = &lut3d->lut[k][j][i]; \
640 vec->r = src[rgba_map[0]] / (float)((1<<(nbits)) - 1); \
641 vec->g = src[rgba_map[1]] / (float)((1<<(nbits)) - 1); \
642 vec->b = src[rgba_map[2]] / (float)((1<<(nbits)) - 1); \
652 if (!lut3d->clut_is16bit) LOAD_CLUT(8);
657 static int config_output(AVFilterLink *outlink)
659 AVFilterContext *ctx = outlink->src;
661 outlink->w = ctx->inputs[0]->w;
662 outlink->h = ctx->inputs[0]->h;
663 outlink->time_base = ctx->inputs[0]->time_base;
667 static int filter_frame_main(AVFilterLink *inlink, AVFrame *inpicref)
669 LUT3DContext *s = inlink->dst->priv;
670 return ff_dualinput_filter_frame_main(&s->dinput, inlink, inpicref);
673 static int filter_frame_clut(AVFilterLink *inlink, AVFrame *inpicref)
675 LUT3DContext *s = inlink->dst->priv;
676 return ff_dualinput_filter_frame_second(&s->dinput, inlink, inpicref);
679 static int request_frame(AVFilterLink *outlink)
681 LUT3DContext *s = outlink->src->priv;
682 return ff_dualinput_request_frame(&s->dinput, outlink);
685 static int config_clut(AVFilterLink *inlink)
687 int size, level, w, h;
688 AVFilterContext *ctx = inlink->dst;
689 LUT3DContext *lut3d = ctx->priv;
690 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
692 lut3d->clut_is16bit = 0;
693 switch (inlink->format) {
694 case AV_PIX_FMT_RGB48:
695 case AV_PIX_FMT_BGR48:
696 case AV_PIX_FMT_RGBA64:
697 case AV_PIX_FMT_BGRA64:
698 lut3d->clut_is16bit = 1;
701 lut3d->clut_step = av_get_padded_bits_per_pixel(desc) >> 3;
702 ff_fill_rgba_map(lut3d->clut_rgba_map, inlink->format);
704 if (inlink->w > inlink->h)
705 av_log(ctx, AV_LOG_INFO, "Padding on the right (%dpx) of the "
706 "Hald CLUT will be ignored\n", inlink->w - inlink->h);
707 else if (inlink->w < inlink->h)
708 av_log(ctx, AV_LOG_INFO, "Padding at the bottom (%dpx) of the "
709 "Hald CLUT will be ignored\n", inlink->h - inlink->w);
710 lut3d->clut_width = w = h = FFMIN(inlink->w, inlink->h);
712 for (level = 1; level*level*level < w; level++);
713 size = level*level*level;
715 av_log(ctx, AV_LOG_WARNING, "The Hald CLUT width does not match the level\n");
716 return AVERROR_INVALIDDATA;
718 av_assert0(w == h && w == size);
720 if (level > MAX_LEVEL) {
721 const int max_clut_level = sqrt(MAX_LEVEL);
722 const int max_clut_size = max_clut_level*max_clut_level*max_clut_level;
723 av_log(ctx, AV_LOG_ERROR, "Too large Hald CLUT "
724 "(maximum level is %d, or %dx%d CLUT)\n",
725 max_clut_level, max_clut_size, max_clut_size);
726 return AVERROR(EINVAL);
728 lut3d->lutsize = level;
733 static AVFrame *update_apply_clut(AVFilterContext *ctx, AVFrame *main,
734 const AVFrame *second)
736 AVFilterLink *inlink = ctx->inputs[0];
737 update_clut(ctx->priv, second);
738 return apply_lut(inlink, main);
741 static av_cold int haldclut_init(AVFilterContext *ctx)
743 LUT3DContext *lut3d = ctx->priv;
744 lut3d->dinput.process = update_apply_clut;
748 static av_cold void haldclut_uninit(AVFilterContext *ctx)
750 LUT3DContext *lut3d = ctx->priv;
751 ff_dualinput_uninit(&lut3d->dinput);
754 static const AVOption haldclut_options[] = {
755 { "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
756 { "repeatlast", "continue applying the last clut after eos", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS },
760 AVFILTER_DEFINE_CLASS(haldclut);
762 static const AVFilterPad haldclut_inputs[] = {
765 .type = AVMEDIA_TYPE_VIDEO,
766 .filter_frame = filter_frame_main,
767 .config_props = config_input,
770 .type = AVMEDIA_TYPE_VIDEO,
771 .filter_frame = filter_frame_clut,
772 .config_props = config_clut,
777 static const AVFilterPad haldclut_outputs[] = {
780 .type = AVMEDIA_TYPE_VIDEO,
781 .request_frame = request_frame,
782 .config_props = config_output,
787 AVFilter avfilter_vf_haldclut = {
789 .description = NULL_IF_CONFIG_SMALL("Adjust colors using a Hald CLUT."),
790 .priv_size = sizeof(LUT3DContext),
791 .init = haldclut_init,
792 .uninit = haldclut_uninit,
793 .query_formats = query_formats,
794 .inputs = haldclut_inputs,
795 .outputs = haldclut_outputs,
796 .priv_class = &haldclut_class,
797 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,