mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
4 years ago
parent
b7251aed46
commit
f6621a8e72
6 changed files with 254 additions and 1 deletions
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/*
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* Copyright (c) 2021 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 <float.h> |
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#include "libavutil/opt.h" |
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#include "libavutil/imgutils.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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typedef struct ColorCorrectContext { |
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const AVClass *class; |
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float rl, bl; |
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float rh, bh; |
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float saturation; |
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int depth; |
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int (*do_slice)(AVFilterContext *s, void *arg, |
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int jobnr, int nb_jobs); |
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} ColorCorrectContext; |
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#define PROCESS() \ |
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float y = yptr[x] * imax; \
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float u = uptr[x] * imax - .5f; \
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float v = vptr[x] * imax - .5f; \
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float ny, nu, nv; \
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\
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ny = y; \
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nu = saturation * (u + y * bd + bl); \
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nv = saturation * (v + y * rd + rl); |
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static int colorcorrect_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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ColorCorrectContext *s = ctx->priv; |
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AVFrame *frame = arg; |
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const int depth = s->depth; |
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const float max = (1 << depth) - 1; |
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const float imax = 1.f / max; |
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const int width = frame->width; |
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const int height = frame->height; |
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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 ylinesize = frame->linesize[0]; |
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const int ulinesize = frame->linesize[1]; |
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const int vlinesize = frame->linesize[2]; |
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uint8_t *yptr = frame->data[0] + slice_start * ylinesize; |
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uint8_t *uptr = frame->data[1] + slice_start * ulinesize; |
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uint8_t *vptr = frame->data[2] + slice_start * vlinesize; |
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const float saturation = s->saturation; |
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const float bl = s->bl; |
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const float rl = s->rl; |
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const float bd = s->bh - bl; |
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const float rd = s->rh - rl; |
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for (int y = slice_start; y < slice_end; y++) { |
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for (int x = 0; x < width; x++) { |
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PROCESS() |
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yptr[x] = av_clip_uint8( ny * max); |
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uptr[x] = av_clip_uint8((nu + 0.5f) * max); |
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vptr[x] = av_clip_uint8((nv + 0.5f) * max); |
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} |
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yptr += ylinesize; |
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uptr += ulinesize; |
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vptr += vlinesize; |
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} |
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return 0; |
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} |
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static int colorcorrect_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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ColorCorrectContext *s = ctx->priv; |
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AVFrame *frame = arg; |
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const int depth = s->depth; |
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const float max = (1 << depth) - 1; |
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const float imax = 1.f / max; |
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const int width = frame->width; |
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const int height = frame->height; |
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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 ylinesize = frame->linesize[0] / 2; |
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const int ulinesize = frame->linesize[1] / 2; |
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const int vlinesize = frame->linesize[2] / 2; |
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uint16_t *yptr = (uint16_t *)frame->data[0] + slice_start * ylinesize; |
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uint16_t *uptr = (uint16_t *)frame->data[1] + slice_start * ulinesize; |
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uint16_t *vptr = (uint16_t *)frame->data[2] + slice_start * vlinesize; |
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const float saturation = s->saturation; |
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const float bl = s->bl; |
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const float rl = s->rl; |
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const float bd = s->bh - bl; |
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const float rd = s->rh - rl; |
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for (int y = slice_start; y < slice_end; y++) { |
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for (int x = 0; x < width; x++) { |
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PROCESS() |
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yptr[x] = av_clip_uintp2_c( ny * max, depth); |
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uptr[x] = av_clip_uintp2_c((nu + 0.5f) * max, depth); |
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vptr[x] = av_clip_uintp2_c((nv + 0.5f) * max, depth); |
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} |
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yptr += ylinesize; |
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uptr += ulinesize; |
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vptr += vlinesize; |
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} |
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return 0; |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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ColorCorrectContext *s = ctx->priv; |
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ctx->internal->execute(ctx, s->do_slice, frame, NULL, |
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FFMIN(frame->height, ff_filter_get_nb_threads(ctx))); |
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return ff_filter_frame(ctx->outputs[0], frame); |
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} |
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static av_cold int query_formats(AVFilterContext *ctx) |
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{ |
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static const enum AVPixelFormat pixel_fmts[] = { |
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, |
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16, |
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AV_PIX_FMT_NONE |
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}; |
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AVFilterFormats *formats = NULL; |
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formats = ff_make_format_list(pixel_fmts); |
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if (!formats) |
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return AVERROR(ENOMEM); |
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return ff_set_common_formats(ctx, formats); |
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} |
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static av_cold int config_input(AVFilterLink *inlink) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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ColorCorrectContext *s = ctx->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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s->depth = desc->comp[0].depth; |
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s->do_slice = s->depth <= 8 ? colorcorrect_slice8 : colorcorrect_slice16; |
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return 0; |
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} |
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static const AVFilterPad colorcorrect_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.needs_writable = 1, |
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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 colorcorrect_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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#define OFFSET(x) offsetof(ColorCorrectContext, x) |
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#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption colorcorrect_options[] = { |
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{ "rl", "set the red shadow spot", OFFSET(rl), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF }, |
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{ "bl", "set the blue shadow spot", OFFSET(bl), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF }, |
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{ "rh", "set the red highlight spot", OFFSET(rh), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF }, |
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{ "bh", "set the blue highlight spot", OFFSET(bh), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF }, |
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{ "saturation", "set the amount of saturation", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl=1}, -3, 3, VF }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(colorcorrect); |
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AVFilter ff_vf_colorcorrect = { |
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.name = "colorcorrect", |
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.description = NULL_IF_CONFIG_SMALL("Adjust color white balance selectively for blacks and whites."), |
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.priv_size = sizeof(ColorCorrectContext), |
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.priv_class = &colorcorrect_class, |
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.query_formats = query_formats, |
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.inputs = colorcorrect_inputs, |
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.outputs = colorcorrect_outputs, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, |
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.process_command = ff_filter_process_command, |
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}; |
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