mirror of
https://git.videolan.org/git/ffmpeg.git
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255 lines
9.2 KiB
C
255 lines
9.2 KiB
C
![]() |
/*
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* Copyright (c) 2013 Paul B Mahol
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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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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "drawutils.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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#define R 0
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#define G 1
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#define B 2
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#define A 3
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typedef struct {
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double in_min, in_max;
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double out_min, out_max;
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} Range;
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typedef struct {
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const AVClass *class;
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Range range[4];
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int nb_comp;
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int bpp;
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int step;
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uint8_t rgba_map[4];
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int linesize;
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} ColorLevelsContext;
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#define OFFSET(x) offsetof(ColorLevelsContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption colorlevels_options[] = {
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{ "rimin", "set input red black point", OFFSET(range[R].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
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{ "gimin", "set input green black point", OFFSET(range[G].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
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{ "bimin", "set input blue black point", OFFSET(range[B].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
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{ "aimin", "set input alpha black point", OFFSET(range[A].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
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{ "rimax", "set input red white point", OFFSET(range[R].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
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{ "gimax", "set input green white point", OFFSET(range[G].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
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{ "bimax", "set input blue white point", OFFSET(range[B].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
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{ "aimax", "set input alpha white point", OFFSET(range[A].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
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{ "romin", "set output red black point", OFFSET(range[R].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
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{ "gomin", "set output green black point", OFFSET(range[G].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
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{ "bomin", "set output blue black point", OFFSET(range[B].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
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{ "aomin", "set output alpha black point", OFFSET(range[A].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
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{ "romax", "set output red white point", OFFSET(range[R].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "gomax", "set output green white point", OFFSET(range[G].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "bomax", "set output blue white point", OFFSET(range[B].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "aomax", "set output alpha white point", OFFSET(range[A].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(colorlevels);
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
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AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
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AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
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AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
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AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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return 0;
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ColorLevelsContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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s->nb_comp = desc->nb_components;
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s->bpp = (desc->comp[0].depth_minus1 + 1) >> 3;
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s->step = (av_get_padded_bits_per_pixel(desc) >> 3) / s->bpp;
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s->linesize = inlink->w * s->step;
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ff_fill_rgba_map(s->rgba_map, inlink->format);
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return 0;
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}
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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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ColorLevelsContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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const int step = s->step;
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AVFrame *out;
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int x, y, i;
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if (av_frame_is_writable(in)) {
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out = in;
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} else {
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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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switch (s->bpp) {
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case 1:
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for (i = 0; i < s->nb_comp; i++) {
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Range *r = &s->range[i];
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const uint8_t offset = s->rgba_map[i];
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const uint8_t *srcrow = in->data[0];
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uint8_t *dstrow = out->data[0];
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int imin = round(r->in_min * UINT8_MAX);
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int imax = round(r->in_max * UINT8_MAX);
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int omin = round(r->out_min * UINT8_MAX);
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int omax = round(r->out_max * UINT8_MAX);
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double coeff;
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if (imin < 0) {
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imin = UINT8_MAX;
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for (y = 0; y < inlink->h; y++) {
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const uint8_t *src = srcrow;
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for (x = 0; x < s->linesize; x += step)
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imin = FFMIN(imin, src[x + offset]);
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srcrow += in->linesize[0];
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}
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}
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if (imax < 0) {
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srcrow = in->data[0];
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imax = 0;
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for (y = 0; y < inlink->h; y++) {
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const uint8_t *src = srcrow;
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for (x = 0; x < s->linesize; x += step)
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imax = FFMAX(imax, src[x + offset]);
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srcrow += in->linesize[0];
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}
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}
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srcrow = in->data[0];
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coeff = (omax - omin) / (double)(imax - imin);
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for (y = 0; y < inlink->h; y++) {
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const uint8_t *src = srcrow;
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uint8_t *dst = dstrow;
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for (x = 0; x < s->linesize; x += step)
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dst[x + offset] = av_clip_uint8((src[x + offset] - imin) * coeff + omin);
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dstrow += out->linesize[0];
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srcrow += in->linesize[0];
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}
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}
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break;
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case 2:
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for (i = 0; i < s->nb_comp; i++) {
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Range *r = &s->range[i];
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const uint8_t offset = s->rgba_map[i];
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const uint8_t *srcrow = in->data[0];
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uint8_t *dstrow = out->data[0];
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int imin = round(r->in_min * UINT16_MAX);
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int imax = round(r->in_max * UINT16_MAX);
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int omin = round(r->out_min * UINT16_MAX);
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int omax = round(r->out_max * UINT16_MAX);
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double coeff;
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if (imin < 0) {
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imin = UINT16_MAX;
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for (y = 0; y < inlink->h; y++) {
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const uint16_t *src = (const uint16_t *)srcrow;
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for (x = 0; x < s->linesize; x += step)
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imin = FFMIN(imin, src[x + offset]);
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srcrow += in->linesize[0];
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}
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}
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if (imax < 0) {
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srcrow = in->data[0];
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imax = 0;
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for (y = 0; y < inlink->h; y++) {
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const uint16_t *src = (const uint16_t *)srcrow;
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for (x = 0; x < s->linesize; x += step)
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imax = FFMAX(imax, src[x + offset]);
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srcrow += in->linesize[0];
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}
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}
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srcrow = in->data[0];
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coeff = (omax - omin) / (double)(imax - imin);
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for (y = 0; y < inlink->h; y++) {
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const uint16_t *src = (const uint16_t*)srcrow;
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uint16_t *dst = (uint16_t *)dstrow;
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for (x = 0; x < s->linesize; x += step)
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dst[x + offset] = av_clip_uint16((src[x + offset] - imin) * coeff + omin);
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dstrow += out->linesize[0];
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srcrow += in->linesize[0];
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}
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}
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}
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if (in != out)
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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 colorlevels_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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.config_props = config_input,
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},
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{ NULL }
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};
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static const AVFilterPad colorlevels_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_colorlevels = {
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.name = "colorlevels",
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.description = NULL_IF_CONFIG_SMALL("Adjust the color levels."),
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.priv_size = sizeof(ColorLevelsContext),
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.priv_class = &colorlevels_class,
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.query_formats = query_formats,
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.inputs = colorlevels_inputs,
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.outputs = colorlevels_outputs,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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};
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