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@ -0,0 +1,458 @@
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/*
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* Copyright (c) 2015 Clément Bœsch <u pkh me>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @todo
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* - use integers so it can be made bitexact and a FATE test can be added
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* - >8 bit support
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/file.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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enum color_range {
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// WARNING: do NOT reorder (see parse_psfile())
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RANGE_REDS,
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RANGE_YELLOWS,
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RANGE_GREENS,
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RANGE_CYANS,
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RANGE_BLUES,
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RANGE_MAGENTAS,
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RANGE_WHITES,
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RANGE_NEUTRALS,
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RANGE_BLACKS,
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NB_RANGES
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};
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enum correction_method {
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CORRECTION_METHOD_ABSOLUTE,
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CORRECTION_METHOD_RELATIVE,
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NB_CORRECTION_METHODS,
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};
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static const char *color_names[NB_RANGES] = {
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"red", "yellow", "green", "cyan", "blue", "magenta", "white", "neutral", "black"
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};
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typedef int (*get_adjust_range_func)(int r, int g, int b, int min_val, int max_val);
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struct process_range {
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int range_id;
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uint32_t mask;
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get_adjust_range_func get_adjust_range;
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};
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typedef struct ThreadData {
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AVFrame *in, *out;
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} ThreadData;
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typedef struct {
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const AVClass *class;
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int correction_method;
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char *opt_cmyk_adjust[NB_RANGES];
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float cmyk_adjust[NB_RANGES][4];
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struct process_range process_ranges[NB_RANGES]; // color ranges to process
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int nb_process_ranges;
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char *psfile;
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} SelectiveColorContext;
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#define OFFSET(x) offsetof(SelectiveColorContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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#define RANGE_OPTION(color_name, range) \
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{ color_name"s", "adjust "color_name" regions", OFFSET(opt_cmyk_adjust[range]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS }
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static const AVOption selectivecolor_options[] = {
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{ "correction_method", "select correction method", OFFSET(correction_method), AV_OPT_TYPE_INT, {.i64 = CORRECTION_METHOD_ABSOLUTE}, 0, NB_CORRECTION_METHODS, FLAGS, "correction_method" },
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{ "absolute", NULL, 0, AV_OPT_TYPE_CONST, {.i64=CORRECTION_METHOD_ABSOLUTE}, INT_MIN, INT_MAX, FLAGS, "correction_method" },
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{ "relative", NULL, 0, AV_OPT_TYPE_CONST, {.i64=CORRECTION_METHOD_RELATIVE}, INT_MIN, INT_MAX, FLAGS, "correction_method" },
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RANGE_OPTION("red", RANGE_REDS),
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RANGE_OPTION("yellow", RANGE_YELLOWS),
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RANGE_OPTION("green", RANGE_GREENS),
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RANGE_OPTION("cyan", RANGE_CYANS),
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RANGE_OPTION("blue", RANGE_BLUES),
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RANGE_OPTION("magenta", RANGE_MAGENTAS),
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RANGE_OPTION("white", RANGE_WHITES),
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RANGE_OPTION("neutral", RANGE_NEUTRALS),
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RANGE_OPTION("black", RANGE_BLACKS),
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{ "psfile", "set Photoshop selectivecolor file name", OFFSET(psfile), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(selectivecolor);
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static inline int get_mid_val(int r, int g, int b)
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{
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if ((r < g && r > b) || (r < b && r > g)) return r;
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if ((g < r && g > b) || (g < b && g > r)) return g;
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if ((b < r && b > g) || (b < g && b > r)) return b;
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return -1;
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}
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static int get_rgb_adjust_range(int r, int g, int b, int min_val, int max_val)
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{
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// max - mid
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const int mid_val = get_mid_val(r, g, b);
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if (mid_val == -1) {
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// XXX: can be simplified
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if ((r != min_val && g == min_val && b == min_val) ||
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(r == min_val && g != min_val && b == min_val) ||
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(r == min_val && g == min_val && b != min_val))
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return max_val - min_val;
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return 0;
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}
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return max_val - mid_val;
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}
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static int get_cmy_adjust_range(int r, int g, int b, int min_val, int max_val)
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{
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// mid - min
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const int mid_val = get_mid_val(r, g, b);
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if (mid_val == -1) {
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// XXX: refactor with rgb
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if ((r != max_val && g == max_val && b == max_val) ||
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(r == max_val && g != max_val && b == max_val) ||
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(r == max_val && g == max_val && b != max_val))
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return max_val - min_val;
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return 0;
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}
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return mid_val - min_val;
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}
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static int get_neutrals_adjust_range(int r, int g, int b, int min_val, int max_val)
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{
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// 1 - (|max-0.5| + |min-0.5|)
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return (255*2 - (abs((max_val<<1) - 255) + abs((min_val<<1) - 255)) + 1) >> 1;
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}
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static int get_whites_adjust_range(int r, int g, int b, int min_val, int max_val)
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{
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// (min - 0.5) * 2
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return (min_val<<1) - 255;
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}
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static int get_blacks_adjust_range(int r, int g, int b, int min_val, int max_val)
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{
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// (0.5 - max) * 2
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return 255 - (max_val<<1);
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}
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static int register_range(SelectiveColorContext *s, int range_id)
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{
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const float *cmyk = s->cmyk_adjust[range_id];
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/* If the color range has user settings, register the color range
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* as "to be processed" */
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if (cmyk[0] || cmyk[1] || cmyk[2] || cmyk[3]) {
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struct process_range *pr = &s->process_ranges[s->nb_process_ranges++];
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if (cmyk[0] < -1.0 || cmyk[0] > 1.0 ||
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cmyk[1] < -1.0 || cmyk[1] > 1.0 ||
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cmyk[2] < -1.0 || cmyk[2] > 1.0 ||
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cmyk[3] < -1.0 || cmyk[3] > 1.0) {
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av_log(s, AV_LOG_ERROR, "Invalid %s adjustments (%g %g %g %g). "
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"Settings must be set in [-1;1] range\n",
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color_names[range_id], cmyk[0], cmyk[1], cmyk[2], cmyk[3]);
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return AVERROR(EINVAL);
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}
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pr->range_id = range_id;
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pr->mask = 1 << range_id;
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if (pr->mask & (1<<RANGE_REDS | 1<<RANGE_GREENS | 1<<RANGE_BLUES)) pr->get_adjust_range = get_rgb_adjust_range;
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else if (pr->mask & (1<<RANGE_CYANS | 1<<RANGE_MAGENTAS | 1<<RANGE_YELLOWS)) pr->get_adjust_range = get_cmy_adjust_range;
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else if (pr->mask & 1<<RANGE_WHITES) pr->get_adjust_range = get_whites_adjust_range;
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else if (pr->mask & 1<<RANGE_NEUTRALS) pr->get_adjust_range = get_neutrals_adjust_range;
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else if (pr->mask & 1<<RANGE_BLACKS) pr->get_adjust_range = get_blacks_adjust_range;
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else
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av_assert0(0);
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}
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return 0;
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}
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static int parse_psfile(AVFilterContext *ctx, const char *fname)
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{
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int16_t val;
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int ret, i, version;
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uint8_t *buf;
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size_t size;
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SelectiveColorContext *s = ctx->priv;
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ret = av_file_map(fname, &buf, &size, 0, NULL);
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if (ret < 0)
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return ret;
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#define READ16(dst) do { \
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if (size < 2) { \
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ret = AVERROR_INVALIDDATA; \
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goto end; \
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} \
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dst = AV_RB16(buf); \
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buf += 2; \
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size -= 2; \
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} while (0)
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READ16(version);
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if (version != 1)
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av_log(s, AV_LOG_WARNING, "Unsupported selective color file version %d, "
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"the settings might not be loaded properly\n", version);
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READ16(s->correction_method);
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// 1st CMYK entry is reserved/unused
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for (i = 0; i < FF_ARRAY_ELEMS(s->cmyk_adjust[0]); i++) {
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READ16(val);
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if (val)
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av_log(s, AV_LOG_WARNING, "%c value of first CMYK entry is not 0 "
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"but %d\n", "CMYK"[i], val);
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}
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for (i = 0; i < FF_ARRAY_ELEMS(s->cmyk_adjust); i++) {
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int k;
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for (k = 0; k < FF_ARRAY_ELEMS(s->cmyk_adjust[0]); k++) {
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READ16(val);
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s->cmyk_adjust[i][k] = val / 100.;
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}
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ret = register_range(s, i);
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if (ret < 0)
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goto end;
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}
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end:
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av_file_unmap(buf, size);
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return ret;
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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int i, ret;
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SelectiveColorContext *s = ctx->priv;
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/* If the following conditions are not met, it will cause trouble while
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* parsing the PS file */
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av_assert0(FF_ARRAY_ELEMS(s->cmyk_adjust) == 10 - 1);
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av_assert0(FF_ARRAY_ELEMS(s->cmyk_adjust[0]) == 4);
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if (s->psfile) {
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ret = parse_psfile(ctx, s->psfile);
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if (ret < 0)
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return ret;
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} else {
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for (i = 0; i < FF_ARRAY_ELEMS(s->opt_cmyk_adjust); i++) {
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const char *opt_cmyk_adjust = s->opt_cmyk_adjust[i];
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if (opt_cmyk_adjust) {
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float *cmyk = s->cmyk_adjust[i];
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sscanf(s->opt_cmyk_adjust[i], "%f %f %f %f", cmyk, cmyk+1, cmyk+2, cmyk+3);
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ret = register_range(s, i);
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if (ret < 0)
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return ret;
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}
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}
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}
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av_log(s, AV_LOG_VERBOSE, "Adjustments:%s\n", s->nb_process_ranges ? "" : " none");
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for (i = 0; i < s->nb_process_ranges; i++) {
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const struct process_range *pr = &s->process_ranges[i];
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const float *cmyk = s->cmyk_adjust[pr->range_id];
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av_log(s, AV_LOG_VERBOSE, "%8ss: C=%6g M=%6g Y=%6g K=%6g\n",
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color_names[pr->range_id], cmyk[0], cmyk[1], cmyk[2], cmyk[3]);
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}
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_RGB32, AV_PIX_FMT_0RGB32, AV_PIX_FMT_NONE};
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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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if (!fmts_list)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, fmts_list);
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}
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static inline int comp_adjust(int adjust_range, float value, float adjust, float k, int correction_method)
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{
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const float min = -value;
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const float max = 1. - value;
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float res = (-1. - adjust) * k - adjust;
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if (correction_method == CORRECTION_METHOD_RELATIVE)
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res *= max;
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return lrint(av_clipf(res, min, max) * adjust_range);
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}
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static inline int selective_color(AVFilterContext *ctx, ThreadData *td,
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int jobnr, int nb_jobs, int direct, int correction_method)
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{
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int i, x, y;
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const AVFrame *in = td->in;
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AVFrame *out = td->out;
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const SelectiveColorContext *s = ctx->priv;
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const int height = in->height;
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const int width = in->width;
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const int slice_start = (height * jobnr ) / nb_jobs;
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const int slice_end = (height * (jobnr+1)) / nb_jobs;
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const int dst_linesize = out->linesize[0];
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const int src_linesize = in->linesize[0];
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uint8_t *dst = out->data[0] + slice_start * dst_linesize;
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const uint8_t *src = in->data[0] + slice_start * src_linesize;
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for (y = slice_start; y < slice_end; y++) {
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const uint32_t *src32 = (const uint32_t *)src;
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uint32_t *dst32 = (uint32_t *)dst;
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for (x = 0; x < width; x++) {
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const uint32_t color = *src32++;
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const int r = color >> 16 & 0xff;
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const int g = color >> 8 & 0xff;
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const int b = color & 0xff;
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const int min_color = FFMIN3(r, g, b);
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const int max_color = FFMAX3(r, g, b);
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const uint32_t range_flag = (r == max_color) << RANGE_REDS
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| (r == min_color) << RANGE_CYANS
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| (g == max_color) << RANGE_GREENS
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| (g == min_color) << RANGE_MAGENTAS
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| (b == max_color) << RANGE_BLUES
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| (b == min_color) << RANGE_YELLOWS
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| (r > 128 && g > 128 && b > 128) << RANGE_WHITES
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| (color && (color & 0xffffff) != 0xffffff) << RANGE_NEUTRALS
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| (r < 128 && g < 128 && b < 128) << RANGE_BLACKS;
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const float rnorm = r / 255.;
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const float gnorm = g / 255.;
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const float bnorm = b / 255.;
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int adjust_r = 0, adjust_g = 0, adjust_b = 0;
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for (i = 0; i < s->nb_process_ranges; i++) {
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const struct process_range *pr = &s->process_ranges[i];
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if (range_flag & pr->mask) {
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const int adjust_range = pr->get_adjust_range(r, g, b, min_color, max_color);
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if (adjust_range > 0) {
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const float *cmyk_adjust = s->cmyk_adjust[pr->range_id];
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const float adj_c = cmyk_adjust[0];
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const float adj_m = cmyk_adjust[1];
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const float adj_y = cmyk_adjust[2];
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const float k = cmyk_adjust[3];
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adjust_r += comp_adjust(adjust_range, rnorm, adj_c, k, correction_method);
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adjust_g += comp_adjust(adjust_range, gnorm, adj_m, k, correction_method);
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adjust_b += comp_adjust(adjust_range, bnorm, adj_y, k, correction_method);
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}
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}
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}
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if (!direct || adjust_r || adjust_g || adjust_b)
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*dst32 = (color & 0xff000000)
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| av_clip_uint8(r + adjust_r) << 16
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| av_clip_uint8(g + adjust_g) << 8
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| av_clip_uint8(b + adjust_b);
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dst32++;
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}
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src += src_linesize;
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dst += dst_linesize;
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}
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return 0;
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}
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#define DEF_SELECTIVE_COLOR_FUNC(name, direct, correction_method) \
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static int selective_color_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
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{ \
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return selective_color(ctx, arg, jobnr, nb_jobs, direct, correction_method); \
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}
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DEF_SELECTIVE_COLOR_FUNC(indirect_absolute, 0, CORRECTION_METHOD_ABSOLUTE)
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DEF_SELECTIVE_COLOR_FUNC(indirect_relative, 0, CORRECTION_METHOD_RELATIVE)
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DEF_SELECTIVE_COLOR_FUNC( direct_absolute, 1, CORRECTION_METHOD_ABSOLUTE)
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DEF_SELECTIVE_COLOR_FUNC( direct_relative, 1, CORRECTION_METHOD_RELATIVE)
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typedef int (*selective_color_func_type)(AVFilterContext *ctx, void *td, int jobnr, int nb_jobs);
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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int direct;
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AVFrame *out;
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ThreadData td;
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const SelectiveColorContext *s = ctx->priv;
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static const selective_color_func_type funcs[2][2] = {
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{selective_color_indirect_absolute, selective_color_indirect_relative},
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{selective_color_direct_absolute, selective_color_direct_relative},
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};
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if (av_frame_is_writable(in)) {
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direct = 1;
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out = in;
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} else {
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direct = 0;
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, in);
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}
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td.in = in;
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td.out = out;
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ctx->internal->execute(ctx, funcs[direct][s->correction_method], &td, NULL,
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FFMIN(inlink->h, ctx->graph->nb_threads));
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if (!direct)
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static const AVFilterPad selectivecolor_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad selectivecolor_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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AVFilter ff_vf_selectivecolor = {
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.name = "selectivecolor",
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.description = NULL_IF_CONFIG_SMALL("Apply CMYK adjustments to specific color ranges."),
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.priv_size = sizeof(SelectiveColorContext),
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.init = init,
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.query_formats = query_formats,
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.inputs = selectivecolor_inputs,
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.outputs = selectivecolor_outputs,
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.priv_class = &selectivecolor_class,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
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};
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Clément Bœsch